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Latest 25 from a total of 140 transactions
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Get Reward | 50418329 | 122 days ago | IN | 0 MATIC | 0.01694012 | ||||
Exit | 49047533 | 157 days ago | IN | 0 MATIC | 0.01282097 | ||||
Get Reward | 49047469 | 157 days ago | IN | 0 MATIC | 0.01701089 | ||||
Get Reward | 45122513 | 256 days ago | IN | 0 MATIC | 0.02150162 | ||||
Get Reward | 45103667 | 256 days ago | IN | 0 MATIC | 0.01051376 | ||||
Get Reward | 39709033 | 396 days ago | IN | 0 MATIC | 0.0139969 | ||||
Get Reward | 39489615 | 402 days ago | IN | 0 MATIC | 0.00969428 | ||||
Get Reward | 39438592 | 403 days ago | IN | 0 MATIC | 0.05552038 | ||||
Get Reward | 39409943 | 404 days ago | IN | 0 MATIC | 0.02017263 | ||||
Get Reward | 39374614 | 405 days ago | IN | 0 MATIC | 0.02349637 | ||||
Get Reward | 39358068 | 405 days ago | IN | 0 MATIC | 0.048938 | ||||
Get Reward | 39346660 | 406 days ago | IN | 0 MATIC | 0.0233813 | ||||
Get Reward | 39330741 | 406 days ago | IN | 0 MATIC | 0.01815796 | ||||
Get Reward | 39328661 | 406 days ago | IN | 0 MATIC | 0.01597351 | ||||
Get Reward | 39327376 | 406 days ago | IN | 0 MATIC | 0.03345547 | ||||
Get Reward | 39325932 | 406 days ago | IN | 0 MATIC | 0.02098356 | ||||
Get Reward | 39325929 | 406 days ago | IN | 0 MATIC | 0.02112229 | ||||
Exit | 39325891 | 406 days ago | IN | 0 MATIC | 0.01143247 | ||||
Exit | 39325870 | 406 days ago | IN | 0 MATIC | 0.01312358 | ||||
Exit | 39325567 | 406 days ago | IN | 0 MATIC | 0.01370803 | ||||
Get Reward | 39324132 | 406 days ago | IN | 0 MATIC | 0.03404817 | ||||
Get Reward | 39323042 | 406 days ago | IN | 0 MATIC | 0.02723361 | ||||
Get Reward | 39310268 | 407 days ago | IN | 0 MATIC | 0.02614572 | ||||
Get Reward | 39310246 | 407 days ago | IN | 0 MATIC | 0.02265767 | ||||
Get Reward | 39145696 | 411 days ago | IN | 0 MATIC | 0.01488972 |
Latest 1 internal transaction
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35716241 | 496 days ago | Contract Creation | 0 MATIC |
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Minimal Proxy Contract for 0xcc0322c70ffcf6678c98632f1391c2fe3c6656fc
Contract Name:
PopularFarm
Compiler Version
v0.8.2+commit.661d1103
Optimization Enabled:
Yes with 10000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/math/SafeMathUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol"; import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; import "./libraries/OwnableUpgradeable.sol"; import "./libraries/NativeMetaTransaction.sol"; contract PopularFarm is Initializable, ReentrancyGuardUpgradeable, UUPSUpgradeable, OwnableUpgradeable, NativeMetaTransaction { using SafeMathUpgradeable for uint256; using SafeERC20Upgradeable for IERC20Upgradeable; /* ========== STATE VARIABLES ========== */ struct UserVestingInfo { bool hasOptForVesting; bool hasSetConfig; } IERC20Upgradeable public stakingToken; uint256 public startTime; uint256 public periodFinish; uint256 public rewardsDuration; uint256 public burnRate; uint256 public vestingPeriod; uint256 public splits; uint256 public claim; uint256 public splitWindow; mapping(address => uint256) public totalBurnableTokens; address[] public rewardTokens; address public deployer; mapping(address => uint256) public rewardsPerTokenMap; mapping(address => uint256) public tokenRewardRate; mapping(address => uint256) public rewardLastUpdatedTime; mapping(address => mapping(address => uint256)) public userRewardPerTokenPaid; mapping(address => UserVestingInfo) public userVestingInfoByUser; mapping(address => mapping(address => uint256)) public rewards; mapping(address => mapping(address => uint256)) public totalEarnedReward; mapping(address => uint256) public claimedSplits; mapping(address => bool) public hasClaimed; mapping(address => mapping(address => uint256)) public totalVestedRewardForUser; uint256 private _totalSupply; mapping(address => uint256) private _balances; /* ========== Error Codes ========== */ // TLM-Token Length Mismatch //ETITE-End Time Is Too Early //CSZ-Cannot Stake Zero //CWZ-Cannot Withdraw Zero //CUVSN- Cannot update vesting schedule now //CCCAC- Cannot change config after claimed //CCTN-Cannot claims token now //TF-Transfer Failed //ROSTNA-rescue of staking token not allowed /* ========== INITIALIZER ========== */ function initialize(bytes memory _data, address _deployer) external initializer { require(_deployer != address(0), "Deployer Cant be empty"); deployer = _deployer; uint256[] memory _rewardAmounts; bytes memory _encodedData; address _stakingToken; (_stakingToken, startTime, periodFinish, rewardTokens, _rewardAmounts, _encodedData) = dataDecoder(_data); (burnRate, vestingPeriod, splits, claim) = vestingDataDecoder(_encodedData); require(periodFinish != block.timestamp && startTime != periodFinish, "ETITE"); rewardsDuration = periodFinish.sub(startTime); stakingToken = IERC20Upgradeable(_stakingToken); splitWindow = vestingPeriod.div(splits); rewardDataIntializer(_rewardAmounts); __Ownable_init(); __ReentrancyGuard_init(); _initializeEIP712("PopularFarm"); } function rewardDataIntializer(uint256[] memory _rewardAmounts) internal { uint256 rewardTokensLength = rewardTokens.length; uint256 rewardAmountlength = _rewardAmounts.length; require(rewardTokensLength == rewardAmountlength, "TLM"); for (uint256 i = 0; i < rewardTokensLength; i++) { address rewardToken=rewardTokens[i]; rewardsPerTokenMap[rewardToken] = rewardPerToken(rewardToken); tokenRewardRate[rewardToken] = _rewardAmounts[i].div(rewardsDuration); require(tokenRewardRate[rewardToken]!=0,"Low reward"); rewardLastUpdatedTime[rewardToken] = lastTimeRewardApplicable(); } } /* ========== UPGRADABLE FUNCTION ========== */ function _authorizeUpgrade(address newImplementation) internal override onlyOwner {} /* ========== 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) { if (block.timestamp < startTime) { return startTime; } return MathUpgradeable.min(block.timestamp, periodFinish); } function rewardPerToken(address rewardToken) public view returns (uint256) { if (_totalSupply == 0) { return rewardsPerTokenMap[rewardToken]; } return rewardsPerTokenMap[rewardToken].add( lastTimeRewardApplicable() .sub(rewardLastUpdatedTime[rewardToken]) .mul(getTokenRewardRate(rewardToken)) .mul(1e18) .div(_totalSupply) ); } function getTokenRewardRate(address token) public view returns (uint256) { if (block.timestamp < startTime) { return 0; } return tokenRewardRate[token]; } function earned(address account, address rewardToken) public view returns (uint256) { return _balances[account] .mul(rewardPerToken(rewardToken).sub(userRewardPerTokenPaid[account][rewardToken])) .div(1e18) .add(rewards[account][rewardToken]); } function tokensEarned(address _account) external view returns (address[] memory,uint256[] memory) { uint256 _rewardTokensLength = rewardTokens.length; uint256[] memory _totalEarnedAmount = new uint256[](_rewardTokensLength); for (uint256 i = 0; i < _rewardTokensLength; i++) { _totalEarnedAmount[i] = earned(_account, rewardTokens[i]); } return (rewardTokens,_totalEarnedAmount); } function tokensRewardRate() external view returns (address[] memory,uint256[] memory) { uint256 _rewardTokensLength = rewardTokens.length; uint256[] memory _rewardRates = new uint256[](_rewardTokensLength); for (uint256 i = 0; i < rewardTokens.length; i++) { _rewardRates[i] = getTokenRewardRate(rewardTokens[i]); } return (rewardTokens,_rewardRates); } function totalVestedRewards(address _account) external view returns (address[] memory, uint256[] memory) { uint256 _rewardTokensLength = rewardTokens.length; uint256[] memory _vestedAmount = new uint256[](_rewardTokensLength); for (uint256 i = 0; i < _rewardTokensLength; i++) { _vestedAmount[i] = totalVestedRewardForUser[_account][rewardTokens[i]]; } return (rewardTokens, _vestedAmount); } function totalEarnedRewards(address _account) external view returns (address[] memory, uint256[] memory) { uint256 _rewardTokensLength = rewardTokens.length; uint256[] memory _totalEarnedAmount = new uint256[](_rewardTokensLength); for (uint256 i = 0; i < _rewardTokensLength; i++) { _totalEarnedAmount[i] = totalEarnedReward[_account][rewardTokens[i]]; } return (rewardTokens, _totalEarnedAmount); } function getRewardForDuration(address rewardToken) external view returns (uint256) { return getTokenRewardRate(rewardToken).mul(rewardsDuration); } function getUserVestingInfo(address account) external view returns (UserVestingInfo memory) { return userVestingInfoByUser[account]; } /* ========== MUTATIVE FUNCTIONS ========== */ function stakeWithPermit( uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external nonReentrant updateReward(_msgSender()) { require(amount > 0, "CSZ"); _totalSupply = _totalSupply.add(amount); _balances[_msgSender()] = _balances[_msgSender()].add(amount); // permit IUniswapV2ERC20(address(stakingToken)).permit(_msgSender(), address(this), amount, deadline, v, r, s); stakingToken.safeTransferFrom(_msgSender(), address(this), amount); emit Staked(_msgSender(), amount); } function stake(uint256 amount) external nonReentrant updateReward(_msgSender()) { require(amount > 0, "CSZ"); _totalSupply = _totalSupply.add(amount); _balances[_msgSender()] = _balances[_msgSender()].add(amount); stakingToken.safeTransferFrom(_msgSender(), address(this), amount); emit Staked(_msgSender(), amount); } function withdraw(uint256 amount) public nonReentrant updateReward(_msgSender()) { require(amount > 0, "CWZ"); _totalSupply = _totalSupply.sub(amount); _balances[_msgSender()] = _balances[_msgSender()].sub(amount); stakingToken.safeTransfer(_msgSender(), amount); emit Withdrawn(_msgSender(), amount); } function setVestingConfig(bool _setConfig) external { require(block.timestamp <= periodFinish, "CUVSN"); UserVestingInfo storage info = userVestingInfoByUser[_msgSender()]; info.hasSetConfig = true; require(!hasClaimed[_msgSender()], "CCCAC"); info.hasOptForVesting = _setConfig; } // Before calling this function caller must set the config for vesting // if caller set false for hasOptForVesting 50% of his reward will give right way // and remaining will account for burn // if set true, his reward will get vested for configured period. function getReward() public nonReentrant updateReward(_msgSender()) { require(block.timestamp >= periodFinish && periodFinish > 0, "CCTN"); UserVestingInfo storage info = userVestingInfoByUser[_msgSender()]; if (!info.hasSetConfig) { info.hasOptForVesting = true; info.hasSetConfig = true; } uint256 reward; uint256 currentSplit; uint256 _rewardTokensLength = rewardTokens.length; if (!info.hasOptForVesting) { hasClaimed[_msgSender()] = true; for (uint256 i = 0; i < _rewardTokensLength; i++) { address rewardToken=rewardTokens[i]; uint256 burnable = rewards[_msgSender()][rewardToken].mul(burnRate).div(100); reward = rewards[_msgSender()][rewardToken].sub(burnable); totalBurnableTokens[rewardToken] = totalBurnableTokens[rewardToken].add(burnable); rewards[_msgSender()][rewardToken] = 0; IERC20Upgradeable(rewardToken).safeTransfer(_msgSender(), reward); emit RewardPaid(_msgSender(), rewardToken, reward); } } else { uint256 claimedSplitsForUser = claimedSplits[_msgSender()]; uint256 currentDate = block.timestamp; for (uint256 i = 0; i < _rewardTokensLength; i++) { address rewardToken=rewardTokens[i]; reward = 0; currentSplit = 0; if (claimedSplitsForUser == 0 && !hasClaimed[_msgSender()]) { totalEarnedReward[_msgSender()][rewardToken] = rewards[_msgSender()][rewardToken]; reward = reward.add((rewards[_msgSender()][rewardToken].mul(claim).div(100))); totalVestedRewardForUser[_msgSender()][rewardToken] = rewards[_msgSender()][rewardToken] .sub(reward); } if (claimedSplitsForUser < splits) { currentSplit = (currentDate.sub(periodFinish)).div(splitWindow); currentSplit = currentSplit > splits ? splits : currentSplit; reward = reward.add( ( totalVestedRewardForUser[_msgSender()][rewardToken].mul( (currentSplit.sub(claimedSplitsForUser)) ) ).div(splits) ); if (claimedSplitsForUser != currentSplit) { claimedSplits[_msgSender()] = currentSplit; } if (reward > 0) { if (i == _rewardTokensLength - 1) { hasClaimed[_msgSender()] = true; } rewards[_msgSender()][rewardToken] = rewards[_msgSender()][rewardToken].sub(reward); IERC20Upgradeable(rewardToken).safeTransfer(_msgSender(), reward); emit RewardPaid(_msgSender(), rewardToken, reward); } } } } } function exit() external { withdraw(_balances[_msgSender()]); if (block.timestamp >= periodFinish && periodFinish > 0) getReward(); } /* ========== RESTRICTED FUNCTIONS ========== */ function rescueBurnableFunds(address receiver, address tokenAddress) external onlyOwner { require(tokenAddress != address(stakingToken), "ROSTNA"); uint256 burnAmount = totalBurnableTokens[tokenAddress]; totalBurnableTokens[tokenAddress] = 0; require(IERC20Upgradeable(tokenAddress).transfer(receiver, burnAmount), "TF"); emit Burned(receiver, tokenAddress, burnAmount); } function rescueFunds(address tokenAddress, address receiver) external onlyOwner { require(tokenAddress != address(stakingToken), "ROSTNA"); require( IERC20Upgradeable(tokenAddress).transfer( receiver, IERC20Upgradeable(tokenAddress).balanceOf(address(this)) ), "TF" ); } function dataDecoder(bytes memory data) internal pure returns ( address _stakingToken, uint256 _startTime, uint256 _endTime, address[] memory _rewardTokens, uint256[] memory _rewardAmounts, bytes memory _basedata ) { (_stakingToken, _startTime, _endTime, _rewardTokens, _rewardAmounts, _basedata) = abi.decode( data, (address, uint256, uint256, address[], uint256[], bytes) ); } function vestingDataDecoder(bytes memory _data) internal pure returns ( uint256 _burnRate, uint256 _vesting, uint256 _splits, uint256 _claim ) { (_burnRate, _vesting, _splits, _claim) = abi.decode(_data, (uint256, uint256, uint256, uint256)); } /* ========== MODIFIERS ========== */ modifier updateReward(address account) { uint256 _rewardTokensLength = rewardTokens.length; for (uint256 i = 0; i < _rewardTokensLength; i++) { address rewardToken=rewardTokens[i]; rewardsPerTokenMap[rewardToken] = rewardPerToken(rewardToken); rewardLastUpdatedTime[rewardToken] = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account][rewardToken] = earned(account, rewardToken); userRewardPerTokenPaid[account][rewardToken] = rewardsPerTokenMap[rewardToken]; } } _; } modifier onlyDeployer(address _account) { require(_account == deployer, "OnlyWhitelisted"); _; } /* ========== EVENTS ========== */ event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, address token, uint256 reward); event Burned(address receiver, address rewardToken, uint256 burnAmount); } interface IUniswapV2ERC20 { function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library MathUpgradeable { /** * @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; // 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 "../IERC20Upgradeable.sol"; import "../../../utils/AddressUpgradeable.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20Upgradeable { using AddressUpgradeable for address; function safeTransfer( IERC20Upgradeable token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20Upgradeable token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20Upgradeable token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20Upgradeable token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20Upgradeable token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuardUpgradeable is Initializable { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; function __ReentrancyGuard_init() internal 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 ^0.8.0; import "../ERC1967/ERC1967UpgradeUpgradeable.sol"; import "./Initializable.sol"; /** * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy. * * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing * `UUPSUpgradeable` with a custom implementation of upgrades. * * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism. * * _Available since v4.1._ */ abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable { function __UUPSUpgradeable_init() internal initializer { __ERC1967Upgrade_init_unchained(); __UUPSUpgradeable_init_unchained(); } function __UUPSUpgradeable_init_unchained() internal initializer { } /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment address private immutable __self = address(this); /** * @dev Check that the execution is being performed through a delegatecall call and that the execution context is * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to * fail. */ modifier onlyProxy() { require(address(this) != __self, "Function must be called through delegatecall"); require(_getImplementation() == __self, "Function must be called through active proxy"); _; } /** * @dev Upgrade the implementation of the proxy to `newImplementation`. * * Calls {_authorizeUpgrade}. * * Emits an {Upgraded} event. */ function upgradeTo(address newImplementation) external virtual onlyProxy { _authorizeUpgrade(newImplementation); _upgradeToAndCallSecure(newImplementation, new bytes(0), false); } /** * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call * encoded in `data`. * * Calls {_authorizeUpgrade}. * * Emits an {Upgraded} event. */ function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy { _authorizeUpgrade(newImplementation); _upgradeToAndCallSecure(newImplementation, data, true); } /** * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by * {upgradeTo} and {upgradeToAndCall}. * * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}. * * ```solidity * function _authorizeUpgrade(address) internal override onlyOwner {} * ``` */ function _authorizeUpgrade(address newImplementation) internal virtual; uint256[50] private __gap; }
// 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; } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable { 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 { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal initializer { _setOwner(msg.sender); } /** * @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() == msg.sender, "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } uint256[49] private __gap; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.11; import '@openzeppelin/contracts/utils/math/SafeMath.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); } function _msgSender() internal view returns (address 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 = msg.sender; } return sender; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.2; import "../beacon/IBeaconUpgradeable.sol"; import "../../utils/AddressUpgradeable.sol"; import "../../utils/StorageSlotUpgradeable.sol"; import "../utils/Initializable.sol"; /** * @dev This abstract contract provides getters and event emitting update functions for * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots. * * _Available since v4.1._ * * @custom:oz-upgrades-unsafe-allow delegatecall */ abstract contract ERC1967UpgradeUpgradeable is Initializable { function __ERC1967Upgrade_init() internal initializer { __ERC1967Upgrade_init_unchained(); } function __ERC1967Upgrade_init_unchained() internal initializer { } // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1 bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143; /** * @dev Storage slot with the address of the current implementation. * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is * validated in the constructor. */ bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; /** * @dev Emitted when the implementation is upgraded. */ event Upgraded(address indexed implementation); /** * @dev Returns the current implementation address. */ function _getImplementation() internal view returns (address) { return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value; } /** * @dev Stores a new address in the EIP1967 implementation slot. */ function _setImplementation(address newImplementation) private { require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract"); StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; } /** * @dev Perform implementation upgrade * * Emits an {Upgraded} event. */ function _upgradeTo(address newImplementation) internal { _setImplementation(newImplementation); emit Upgraded(newImplementation); } /** * @dev Perform implementation upgrade with additional setup call. * * Emits an {Upgraded} event. */ function _upgradeToAndCall( address newImplementation, bytes memory data, bool forceCall ) internal { _upgradeTo(newImplementation); if (data.length > 0 || forceCall) { _functionDelegateCall(newImplementation, data); } } /** * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call. * * Emits an {Upgraded} event. */ function _upgradeToAndCallSecure( address newImplementation, bytes memory data, bool forceCall ) internal { address oldImplementation = _getImplementation(); // Initial upgrade and setup call _setImplementation(newImplementation); if (data.length > 0 || forceCall) { _functionDelegateCall(newImplementation, data); } // Perform rollback test if not already in progress StorageSlotUpgradeable.BooleanSlot storage rollbackTesting = StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT); if (!rollbackTesting.value) { // Trigger rollback using upgradeTo from the new implementation rollbackTesting.value = true; _functionDelegateCall( newImplementation, abi.encodeWithSignature("upgradeTo(address)", oldImplementation) ); rollbackTesting.value = false; // Check rollback was effective require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades"); // Finally reset to the new implementation and log the upgrade _upgradeTo(newImplementation); } } /** * @dev Storage slot with the admin of the contract. * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is * validated in the constructor. */ bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103; /** * @dev Emitted when the admin account has changed. */ event AdminChanged(address previousAdmin, address newAdmin); /** * @dev Returns the current admin. */ function _getAdmin() internal view returns (address) { return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value; } /** * @dev Stores a new address in the EIP1967 admin slot. */ function _setAdmin(address newAdmin) private { require(newAdmin != address(0), "ERC1967: new admin is the zero address"); StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin; } /** * @dev Changes the admin of the proxy. * * Emits an {AdminChanged} event. */ function _changeAdmin(address newAdmin) internal { emit AdminChanged(_getAdmin(), newAdmin); _setAdmin(newAdmin); } /** * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy. * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor. */ bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50; /** * @dev Emitted when the beacon is upgraded. */ event BeaconUpgraded(address indexed beacon); /** * @dev Returns the current beacon. */ function _getBeacon() internal view returns (address) { return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value; } /** * @dev Stores a new beacon in the EIP1967 beacon slot. */ function _setBeacon(address newBeacon) private { require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract"); require( AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()), "ERC1967: beacon implementation is not a contract" ); StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon; } /** * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that). * * Emits a {BeaconUpgraded} event. */ function _upgradeBeaconToAndCall( address newBeacon, bytes memory data, bool forceCall ) internal { _setBeacon(newBeacon); emit BeaconUpgraded(newBeacon); if (data.length > 0 || forceCall) { _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data); } } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) { require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed"); } uint256[50] private __gap; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev This is the interface that {BeaconProxy} expects of its beacon. */ interface IBeaconUpgradeable { /** * @dev Must return an address that can be used as a delegate call target. * * {BeaconProxy} will check that this address is a contract. */ function implementation() external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ``` * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` * * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._ */ library StorageSlotUpgradeable { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { assembly { r.slot := slot } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.11; import "./MetaInitializable.sol"; contract EIP712Base is MetaInitializable { struct EIP712Domain { string name; string version; address verifyingContract; bytes32 salt; } string public constant 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 contractsa that inherits this contract follows proxy pattern // so it is not possible to do this in a constructor function _initializeEIP712(string memory name) internal metaInitializer { _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 >=0.6.11; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; contract MetaInitializable is Initializable{ bool inited; function __MetaInitializable_init() internal initializer { inited = false; } modifier metaInitializer() { require(!inited, 'already inited'); _; inited = true; } }
{ "metadata": { "bytecodeHash": "none", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 10000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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Multichain Portfolio | 24 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
MATIC | 100.00% | $0.030397 | 2,974.6861 | $90.42 |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.