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Latest 25 from a total of 146 transactions
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Transfer Ownersh... | 15487325 | 714 days ago | IN | 0 ETH | 0.00066745 | ||||
Drain To | 15220137 | 757 days ago | IN | 0 ETH | 0.01434175 | ||||
Drain To | 15220128 | 757 days ago | IN | 0 ETH | 0.0046936 | ||||
Drain To | 15220125 | 757 days ago | IN | 0 ETH | 0.00072663 | ||||
Withdraw Protect... | 15218870 | 757 days ago | IN | 0 ETH | 0.00256951 | ||||
Drain To | 15178538 | 763 days ago | IN | 0 ETH | 0.00396836 | ||||
Withdraw Protect... | 15174758 | 764 days ago | IN | 0 ETH | 0.00084042 | ||||
Withdraw Protect... | 15174756 | 764 days ago | IN | 0 ETH | 0.00056194 | ||||
Withdraw Protect... | 15174756 | 764 days ago | IN | 0 ETH | 0.033617 | ||||
Withdraw Protect... | 15171313 | 764 days ago | IN | 0 ETH | 0.00149217 | ||||
Withdraw Protect... | 15170132 | 764 days ago | IN | 0 ETH | 0.00218897 | ||||
Withdraw Protect... | 15168733 | 765 days ago | IN | 0 ETH | 0.00294841 | ||||
Withdraw Protect... | 15168707 | 765 days ago | IN | 0 ETH | 0.00415908 | ||||
Withdraw Protect... | 15166977 | 765 days ago | IN | 0 ETH | 0.00249413 | ||||
Withdraw Protect... | 15166821 | 765 days ago | IN | 0 ETH | 0.00170551 | ||||
Withdraw Protect... | 15164977 | 765 days ago | IN | 0 ETH | 0.00161146 | ||||
Withdraw Protect... | 15161675 | 766 days ago | IN | 0 ETH | 0.00742926 | ||||
Withdraw Protect... | 15160076 | 766 days ago | IN | 0 ETH | 0.00110293 | ||||
Withdraw Protect... | 15159922 | 766 days ago | IN | 0 ETH | 0.0017999 | ||||
Withdraw Protect... | 15156026 | 767 days ago | IN | 0 ETH | 0.00203019 | ||||
Withdraw Protect... | 15152023 | 767 days ago | IN | 0 ETH | 0.00130029 | ||||
Withdraw Protect... | 15152005 | 767 days ago | IN | 0 ETH | 0.00069376 | ||||
Withdraw Protect... | 15149623 | 768 days ago | IN | 0 ETH | 0.00162473 | ||||
Withdraw Protect... | 15146237 | 768 days ago | IN | 0 ETH | 0.00079899 | ||||
Withdraw Protect... | 15145922 | 768 days ago | IN | 0 ETH | 0.002088 |
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Contract Name:
Pool
Compiler Version
v0.8.7+commit.e28d00a7
Optimization Enabled:
Yes with 999999 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/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@airswap/staking/contracts/interfaces/IStaking.sol"; import "./interfaces/IPool.sol"; /** * @title AirSwap Pool: Claim Tokens * @notice https://www.airswap.io/ */ contract Pool is IPool, Ownable { using SafeERC20 for IERC20; bytes32 public constant DOMAIN_TYPEHASH = keccak256( abi.encodePacked( "EIP712Domain(", "string name,", "string version,", "uint256 chainId,", "address verifyingContract", ")" ) ); bytes32 public constant CLAIM_TYPEHASH = keccak256( abi.encodePacked( "Claim(", "uint256 nonce,", "uint256 expiry,", "address participant,", "uint256 score", ")" ) ); bytes32 public constant DOMAIN_NAME = keccak256("POOL"); bytes32 public constant DOMAIN_VERSION = keccak256("1"); uint256 public immutable DOMAIN_CHAIN_ID; bytes32 public immutable DOMAIN_SEPARATOR; uint256 internal constant MAX_PERCENTAGE = 100; uint256 internal constant MAX_SCALE = 77; // Larger the scale, lower the output for a claim uint256 public scale; // Max percentage for a claim with infinite score uint256 public max; // Mapping of address to boolean to enable admin accounts mapping(address => bool) public admins; /** * @notice Double mapping of signers to nonce groups to nonce states * @dev The nonce group is computed as nonce / 256, so each group of 256 sequential nonces uses the same key * @dev The nonce states are encoded as 256 bits, for each nonce in the group 0 means available and 1 means used */ mapping(address => mapping(uint256 => uint256)) internal noncesClaimed; // Staking contract address address public stakingContract; // Staking token address address public stakingToken; /** * @notice Constructor * @param _scale uint256 * @param _max uint256 * @param _stakingContract address * @param _stakingToken address */ constructor( uint256 _scale, uint256 _max, address _stakingContract, address _stakingToken ) { require(_max <= MAX_PERCENTAGE, "MAX_TOO_HIGH"); require(_scale <= MAX_SCALE, "SCALE_TOO_HIGH"); scale = _scale; max = _max; stakingContract = _stakingContract; stakingToken = _stakingToken; admins[msg.sender] = true; uint256 currentChainId = getChainId(); DOMAIN_CHAIN_ID = currentChainId; DOMAIN_SEPARATOR = keccak256( abi.encode( DOMAIN_TYPEHASH, DOMAIN_NAME, DOMAIN_VERSION, currentChainId, this ) ); IERC20(stakingToken).safeApprove(stakingContract, 2**256 - 1); } /** * @notice Set scale * @dev Only owner * @param _scale uint256 */ function setScale(uint256 _scale) external override onlyOwner { require(_scale <= MAX_SCALE, "SCALE_TOO_HIGH"); scale = _scale; emit SetScale(scale); } /** * @notice Set max * @dev Only owner * @param _max uint256 */ function setMax(uint256 _max) external override onlyOwner { require(_max <= MAX_PERCENTAGE, "MAX_TOO_HIGH"); max = _max; emit SetMax(max); } /** * @notice Add admin address * @dev Only owner * @param _admin address */ function addAdmin(address _admin) external override onlyOwner { require(_admin != address(0), "INVALID_ADDRESS"); admins[_admin] = true; } /** * @notice Remove admin address * @dev Only owner * @param _admin address */ function removeAdmin(address _admin) external override onlyOwner { require(admins[_admin] == true, "ADMIN_NOT_SET"); admins[_admin] = false; } /** * @notice Set staking contract address * @dev Only owner * @param _stakingContract address */ function setStakingContract(address _stakingContract) external override onlyOwner { require(_stakingContract != address(0), "INVALID_ADDRESS"); // set allowance on old staking contract to zero IERC20(stakingToken).safeApprove(stakingContract, 0); stakingContract = _stakingContract; IERC20(stakingToken).safeApprove(stakingContract, 2**256 - 1); } /** * @notice Set staking token address * @dev Only owner * @param _stakingToken address */ function setStakingToken(address _stakingToken) external override onlyOwner { require(_stakingToken != address(0), "INVALID_ADDRESS"); // set allowance on old staking token to zero IERC20(stakingToken).safeApprove(stakingContract, 0); stakingToken = _stakingToken; IERC20(stakingToken).safeApprove(stakingContract, 2**256 - 1); } /** * @notice Admin function to migrate funds * @dev Only owner * @param tokens address[] * @param dest address */ function drainTo(address[] calldata tokens, address dest) external override onlyOwner { for (uint256 i = 0; i < tokens.length; i++) { uint256 bal = IERC20(tokens[i]).balanceOf(address(this)); IERC20(tokens[i]).safeTransfer(dest, bal); } emit DrainTo(tokens, dest); } /** * @notice Withdraw tokens from the pool using a signed claim * @param token address * @param nonce uint256 * @param expiry uint256 * @param score uint256 * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function withdraw( address token, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external override { withdrawProtected(0, msg.sender, token, nonce, expiry, msg.sender, score, v, r, s); } /** * @notice Withdraw tokens from the pool using a signed claim and send to recipient * @param minimumAmount uint256 * @param token address * @param recipient address * @param nonce uint256 * @param expiry uint256 * @param score uint256 * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function withdrawWithRecipient( uint256 minimumAmount, address token, address recipient, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external override { withdrawProtected( minimumAmount, recipient, token, nonce, expiry, msg.sender, score, v, r, s ); } /** * @notice Withdraw tokens from the pool using a signed claim and stake * @param minimumAmount uint256 * @param token address * @param nonce uint256 * @param expiry uint256 * @param score uint256 * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function withdrawAndStake( uint256 minimumAmount, address token, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external override { require(token == address(stakingToken), "INVALID_TOKEN"); _checkValidClaim(nonce, expiry, msg.sender, score, v, r, s); uint256 amount = _withdrawCheck(score, token, minimumAmount); IStaking(stakingContract).stakeFor(msg.sender, amount); emit Withdraw(nonce, expiry, msg.sender, token, amount, score); } /** * @notice Withdraw tokens from the pool using signature and stake for another account * @param minimumAmount uint256 * @param token address * @param account address * @param nonce uint256 * @param expiry uint256 * @param score uint256 * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function withdrawAndStakeFor( uint256 minimumAmount, address token, address account, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external override { require(token == address(stakingToken), "INVALID_TOKEN"); _checkValidClaim(nonce, expiry, msg.sender, score, v, r, s); uint256 amount = _withdrawCheck(score, token, minimumAmount); IStaking(stakingContract).stakeFor(account, amount); emit Withdraw(nonce, expiry, msg.sender, token, amount, score); } /** * @notice Withdraw tokens from the pool using a signed claim * @param minimumAmount uint256 * @param token address * @param participant address * @param nonce uint256 * @param expiry uint256 * @param score uint256 * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function withdrawProtected( uint256 minimumAmount, address recipient, address token, uint256 nonce, uint256 expiry, address participant, uint256 score, uint8 v, bytes32 r, bytes32 s ) public override returns (uint256) { _checkValidClaim(nonce, expiry, participant, score, v, r, s); uint256 amount = _withdrawCheck(score, token, minimumAmount); IERC20(token).safeTransfer(recipient, amount); emit Withdraw(nonce, expiry, participant, token, amount, score); return amount; } /** * @notice Calculate output amount for an input score * @param score uint256 * @param token address * @return amount uint256 amount to claim based on balance, scale, and max */ function calculate(uint256 score, address token) public view override returns (uint256 amount) { uint256 balance = IERC20(token).balanceOf(address(this)); uint256 divisor = (uint256(10)**scale) + score; return (max * score * balance) / divisor / 100; } /** * @notice Verify a signature * @param nonce uint256 * @param expiry uint256 * @param participant address * @param score uint256 * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function verify( uint256 nonce, uint256 expiry, address participant, uint256 score, uint8 v, bytes32 r, bytes32 s ) public view override returns (bool valid) { require(DOMAIN_CHAIN_ID == getChainId(), "CHAIN_ID_CHANGED"); require(expiry > block.timestamp, "EXPIRY_PASSED"); bytes32 claimHash = keccak256( abi.encode(CLAIM_TYPEHASH, nonce, expiry, participant, score) ); address signatory = ecrecover( keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR, claimHash)), v, r, s ); admins[signatory] && !nonceUsed(participant, nonce) ? valid = true : valid = false; } /** * @notice Returns true if the nonce has been used * @param participant address * @param nonce uint256 */ function nonceUsed(address participant, uint256 nonce) public view override returns (bool) { uint256 groupKey = nonce / 256; uint256 indexInGroup = nonce % 256; return (noncesClaimed[participant][groupKey] >> indexInGroup) & 1 == 1; } /** * @notice Returns the current chainId using the chainid opcode * @return id uint256 The chain id */ function getChainId() public view returns (uint256 id) { // no-inline-assembly assembly { id := chainid() } } /** * @notice Checks Claim Nonce, Expiry, Participant, Score, Signature * @param nonce uint256 * @param expiry uint256 * @param participant address * @param score uint256 * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function _checkValidClaim( uint256 nonce, uint256 expiry, address participant, uint256 score, uint8 v, bytes32 r, bytes32 s ) internal { require(DOMAIN_CHAIN_ID == getChainId(), "CHAIN_ID_CHANGED"); require(expiry > block.timestamp, "EXPIRY_PASSED"); bytes32 claimHash = keccak256( abi.encode(CLAIM_TYPEHASH, nonce, expiry, participant, score) ); address signatory = ecrecover( keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR, claimHash)), v, r, s ); require(admins[signatory], "UNAUTHORIZED"); require(_markNonceAsUsed(participant, nonce), "NONCE_ALREADY_USED"); } /** * @notice Marks a nonce as used for the given participant * @param participant address * @param nonce uint256 * @return bool True if nonce was not marked as used already */ function _markNonceAsUsed(address participant, uint256 nonce) internal returns (bool) { uint256 groupKey = nonce / 256; uint256 indexInGroup = nonce % 256; uint256 group = noncesClaimed[participant][groupKey]; // If it is already used, return false if ((group >> indexInGroup) & 1 == 1) { return false; } noncesClaimed[participant][groupKey] = group | (uint256(1) << indexInGroup); return true; } /** * @notice Withdraw tokens from the pool using a score * @param score uint256 * @param token address * @param minimumAmount uint256 */ function _withdrawCheck( uint256 score, address token, uint256 minimumAmount ) internal view returns (uint256) { require(score > 0, "SCORE_MUST_BE_PROVIDED"); uint256 amount = calculate(score, token); require(amount >= minimumAmount, "INSUFFICIENT_AMOUNT"); return amount; } }
// 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/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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IStaking { struct Stake { uint256 duration; uint256 balance; uint256 timestamp; } // ERC-20 Transfer event event Transfer(address indexed from, address indexed to, uint256 tokens); // Schedule timelock event event ScheduleDurationChange(uint256 indexed unlockTimestamp); // Cancel timelock event event CancelDurationChange(); // Complete timelock event event CompleteDurationChange(uint256 indexed newDuration); // Propose Delegate event event ProposeDelegate(address indexed delegate, address indexed account); // Set Delegate event event SetDelegate(address indexed delegate, address indexed account); /** * @notice Stake tokens * @param amount uint256 */ function stake(uint256 amount) external; /** * @notice Unstake tokens * @param amount uint256 */ function unstake(uint256 amount) external; /** * @notice Receive stakes for an account * @param account address */ function getStakes(address account) external view returns (Stake memory accountStake); /** * @notice Total balance of all accounts (ERC-20) */ function totalSupply() external view returns (uint256); /** * @notice Balance of an account (ERC-20) */ function balanceOf(address account) external view returns (uint256); /** * @notice Decimals of underlying token (ERC-20) */ function decimals() external view returns (uint8); /** * @notice Stake tokens for an account * @param account address * @param amount uint256 */ function stakeFor(address account, uint256 amount) external; /** * @notice Available amount for an account * @param account uint256 */ function available(address account) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IPool { event Withdraw( uint256 indexed nonce, uint256 indexed expiry, address indexed account, address token, uint256 amount, uint256 score ); event SetScale(uint256 scale); event SetMax(uint256 max); event DrainTo(address[] tokens, address dest); function setScale(uint256 _scale) external; function setMax(uint256 _max) external; function addAdmin(address _admin) external; function removeAdmin(address _admin) external; function setStakingContract(address _stakingContract) external; function setStakingToken(address _stakingToken) external; function drainTo(address[] calldata tokens, address dest) external; function withdraw( address token, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external; function withdrawWithRecipient( uint256 minimumAmount, address token, address recipient, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external; function withdrawAndStake( uint256 minimumAmount, address token, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external; function withdrawAndStakeFor( uint256 minimumAmount, address token, address account, uint256 nonce, uint256 expiry, uint256 score, uint8 v, bytes32 r, bytes32 s ) external; function withdrawProtected( uint256 minimumAmount, address recipient, address token, uint256 nonce, uint256 expiry, address participant, uint256 score, uint8 v, bytes32 r, bytes32 s ) external returns (uint256); function calculate(uint256 score, address token) external view returns (uint256 amount); function verify( uint256 nonce, uint256 expiry, address participant, uint256 score, uint8 v, bytes32 r, bytes32 s ) external view returns (bool valid); function nonceUsed(address participant, uint256 nonce) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Address.sol) pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
{ "optimizer": { "enabled": true, "runs": 999999 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"uint256","name":"_scale","type":"uint256"},{"internalType":"uint256","name":"_max","type":"uint256"},{"internalType":"address","name":"_stakingContract","type":"address"},{"internalType":"address","name":"_stakingToken","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address[]","name":"tokens","type":"address[]"},{"indexed":false,"internalType":"address","name":"dest","type":"address"}],"name":"DrainTo","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"max","type":"uint256"}],"name":"SetMax","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"scale","type":"uint256"}],"name":"SetScale","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"nonce","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"expiry","type":"uint256"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"score","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"CLAIM_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_CHAIN_ID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_NAME","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_VERSION","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"name":"addAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"admins","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"score","type":"uint256"},{"internalType":"address","name":"token","type":"address"}],"name":"calculate","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"address","name":"dest","type":"address"}],"name":"drainTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getChainId","outputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"max","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"participant","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"nonceUsed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"name":"removeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"scale","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_max","type":"uint256"}],"name":"setMax","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_scale","type":"uint256"}],"name":"setScale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_stakingContract","type":"address"}],"name":"setStakingContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_stakingToken","type":"address"}],"name":"setStakingToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakingContract","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"stakingToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"address","name":"participant","type":"address"},{"internalType":"uint256","name":"score","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"verify","outputs":[{"internalType":"bool","name":"valid","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"score","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"minimumAmount","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"score","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"withdrawAndStake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"minimumAmount","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"score","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"withdrawAndStakeFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"minimumAmount","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"address","name":"participant","type":"address"},{"internalType":"uint256","name":"score","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"withdrawProtected","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"minimumAmount","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"score","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"withdrawWithRecipient","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000640000000000000000000000006d88b09805b90dad911e5c5a512eedd984d6860b00000000000000000000000027054b13b1b798b345b591a4d22e6562d47ea75a
-----Decoded View---------------
Arg [0] : _scale (uint256): 10
Arg [1] : _max (uint256): 100
Arg [2] : _stakingContract (address): 0x6d88B09805b90dad911E5C5A512eEDd984D6860B
Arg [3] : _stakingToken (address): 0x27054b13b1B798B345b591a4d22e6562d47eA75a
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000064
Arg [2] : 0000000000000000000000006d88b09805b90dad911e5c5a512eedd984d6860b
Arg [3] : 00000000000000000000000027054b13b1b798b345b591a4d22e6562d47ea75a
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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.