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0x054322f8b7b33e6156bacf5b448eb0421285cd9176aee67e369f843ff1af51c0 | Swap And Forward... | (pending) | 2 days ago | IN | 0 ETH | (Pending) | |||
Forward ERC20 | 21836865 | 1 min ago | IN | 0 ETH | 0.00030931 | ||||
Forward Eth | 21836776 | 19 mins ago | IN | 0.0032 ETH | 0.00012704 | ||||
Swap And Forward... | 21836757 | 23 mins ago | IN | 0 ETH | 0.00036783 | ||||
Forward ERC20 | 21836674 | 39 mins ago | IN | 0 ETH | 0.0001457 | ||||
Forward ERC20 | 21836671 | 40 mins ago | IN | 0 ETH | 0.00021064 | ||||
Forward Eth | 21836607 | 53 mins ago | IN | 0.004 ETH | 0.00017399 | ||||
Swap And Forward... | 21836588 | 57 mins ago | IN | 0 ETH | 0.0004147 | ||||
Forward Eth | 21836578 | 1 hrs ago | IN | 0.0086 ETH | 0.00012566 | ||||
Forward ERC20 | 21836549 | 1 hr ago | IN | 0 ETH | 0.00023317 | ||||
Forward Eth | 21836547 | 1 hr ago | IN | 0.002 ETH | 0.00019306 | ||||
Forward Eth | 21836539 | 1 hr ago | IN | 0.16354915 ETH | 0.00010809 | ||||
Swap And Forward... | 21836527 | 1 hr ago | IN | 0 ETH | 0.0008669 | ||||
Swap And Forward... | 21836526 | 1 hr ago | IN | 0 ETH | 0.0008967 | ||||
Forward Eth | 21836518 | 1 hr ago | IN | 1.0041 ETH | 0.00010286 | ||||
Forward Eth | 21836508 | 1 hr ago | IN | 0.03090091 ETH | 0.00019083 | ||||
Swap And Forward... | 21836497 | 1 hr ago | IN | 0 ETH | 0.00044664 | ||||
Forward ERC20 | 21836496 | 1 hr ago | IN | 0 ETH | 0.00020578 | ||||
Swap And Forward... | 21836441 | 1 hr ago | IN | 0 ETH | 0.00145271 | ||||
Swap And Forward... | 21836410 | 1 hr ago | IN | 0 ETH | 0.00059817 | ||||
Swap And Forward... | 21836401 | 1 hr ago | IN | 0 ETH | 0.00103301 | ||||
Forward Eth | 21836358 | 1 hr ago | IN | 0.22196 ETH | 0.00019014 | ||||
Forward Eth | 21836358 | 1 hr ago | IN | 0.22196 ETH | 0.00019012 | ||||
Forward Eth | 21836357 | 1 hr ago | IN | 0.0092 ETH | 0.00017582 | ||||
Forward Eth | 21836349 | 1 hr ago | IN | 0.01 ETH | 0.00019337 |
Latest 25 internal transactions (View All)
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21836871 | 23 secs ago | 0.01066478 ETH | ||||
21836871 | 23 secs ago | 0.01066478 ETH | ||||
21836868 | 1 mins ago | 0.01665036 ETH | ||||
21836868 | 1 mins ago | 0.01665036 ETH | ||||
21836867 | 1 min ago | 0.22181786 ETH | ||||
21836867 | 1 min ago | 0.22181786 ETH | ||||
21836864 | 1 min ago | 1.417845 ETH | ||||
21836864 | 1 min ago | 1.417845 ETH | ||||
21836863 | 1 min ago | 0.95 ETH | ||||
21836863 | 1 min ago | 0.95 ETH | ||||
21836859 | 2 mins ago | 0.01123369 ETH | ||||
21836859 | 2 mins ago | 0.01123369 ETH | ||||
21836853 | 3 mins ago | 0.00496499 ETH | ||||
21836853 | 3 mins ago | 0.00496499 ETH | ||||
21836849 | 4 mins ago | 0.49649999 ETH | ||||
21836849 | 4 mins ago | 0.49649999 ETH | ||||
21836848 | 4 mins ago | 0.02327733 ETH | ||||
21836848 | 4 mins ago | 0.02327733 ETH | ||||
21836845 | 5 mins ago | 0.00397199 ETH | ||||
21836845 | 5 mins ago | 0.00397199 ETH | ||||
21836844 | 5 mins ago | 0.00695099 ETH | ||||
21836844 | 5 mins ago | 0.00695099 ETH | ||||
21836843 | 5 mins ago | 0.00892303 ETH | ||||
21836843 | 5 mins ago | 0.00892303 ETH | ||||
21836826 | 9 mins ago | 0.00775667 ETH |
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Contract Source Code Verified (Exact Match)
Contract Name:
MayanForwarder
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 200 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/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol"; import "./libs/BytesLib.sol"; contract MayanForwarder { using SafeERC20 for IERC20; using BytesLib for bytes; event SwapAndForwarded(uint256 amount); address public guardian; address public nextGuardian; mapping(address => bool) public swapProtocols; mapping(address => bool) public mayanProtocols; event ForwardedEth(address mayanProtocol, bytes protocolData); event ForwardedERC20(address token, uint256 amount, address mayanProtocol, bytes protocolData); event SwapAndForwardedEth(uint256 amountIn, address swapProtocol, address middleToken, uint256 middleAmount, address mayanProtocol, bytes mayanData); event SwapAndForwardedERC20(address tokenIn, uint256 amountIn, address swapProtocol, address middleToken, uint256 middleAmount, address mayanProtocol, bytes mayanData); error UnsupportedProtocol(); struct PermitParams { uint256 value; uint256 deadline; uint8 v; bytes32 r; bytes32 s; } constructor(address _guardian, address[] memory _swapProtocols, address[] memory _mayanProtocols) { guardian = _guardian; for (uint256 i = 0; i < _swapProtocols.length; i++) { swapProtocols[_swapProtocols[i]] = true; } for (uint256 i = 0; i < _mayanProtocols.length; i++) { mayanProtocols[_mayanProtocols[i]] = true; } } function forwardEth( address mayanProtocol, bytes calldata protocolData ) external payable { if (!mayanProtocols[mayanProtocol]) { revert UnsupportedProtocol(); } (bool success, bytes memory returnedData) = mayanProtocol.call{value: msg.value}(protocolData); require(success, string(returnedData)); emit ForwardedEth(mayanProtocol, protocolData); } function forwardERC20( address tokenIn, uint256 amountIn, PermitParams calldata permitParams, address mayanProtocol, bytes calldata protocolData ) external payable { if (!mayanProtocols[mayanProtocol]) { revert UnsupportedProtocol(); } pullTokenIn(tokenIn, amountIn, permitParams); maxApproveIfNeeded(tokenIn, mayanProtocol, amountIn); (bool success, bytes memory returnedData) = mayanProtocol.call{value: msg.value}(protocolData); require(success, string(returnedData)); emit ForwardedERC20(tokenIn, amountIn, mayanProtocol, protocolData); } function swapAndForwardEth( uint256 amountIn, address swapProtocol, bytes calldata swapData, address middleToken, uint256 minMiddleAmount, address mayanProtocol, bytes calldata mayanData ) external payable { if (!swapProtocols[swapProtocol] || !mayanProtocols[mayanProtocol]) { revert UnsupportedProtocol(); } require(middleToken != address(0), "middleToken cannot be zero address"); require(msg.value >= amountIn, "insufficient amountIn"); uint256 middleAmount = IERC20(middleToken).balanceOf(address(this)); (bool success, bytes memory returnedData) = swapProtocol.call{value: amountIn}(swapData); require(success, string(returnedData)); middleAmount = IERC20(middleToken).balanceOf(address(this)) - middleAmount; require(middleAmount >= minMiddleAmount, "MayanForwarder: insufficient middle token amount"); maxApproveIfNeeded(middleToken, mayanProtocol, middleAmount); bytes memory modifiedData = replaceMiddleAmount(mayanData, middleAmount); (success, returnedData) = mayanProtocol.call{value: msg.value - amountIn}(modifiedData); require(success, string(returnedData)); emit SwapAndForwardedEth(amountIn, swapProtocol, middleToken, middleAmount, mayanProtocol, mayanData); } function swapAndForwardERC20( address tokenIn, uint256 amountIn, PermitParams calldata permitParams, address swapProtocol, bytes calldata swapData, address middleToken, uint256 minMiddleAmount, address mayanProtocol, bytes calldata mayanData ) external payable { if (!swapProtocols[swapProtocol] || !mayanProtocols[mayanProtocol]) { revert UnsupportedProtocol(); } require(tokenIn != middleToken, "tokenIn and tokenOut must be different"); pullTokenIn(tokenIn, amountIn, permitParams); maxApproveIfNeeded(tokenIn, swapProtocol, amountIn); uint256 middleAmount = IERC20(middleToken).balanceOf(address(this)); (bool success, bytes memory returnedData) = swapProtocol.call{value: 0}(swapData); require(success, string(returnedData)); middleAmount = IERC20(middleToken).balanceOf(address(this)) - middleAmount; require(middleAmount >= minMiddleAmount, "insufficient middle token"); maxApproveIfNeeded(middleToken, mayanProtocol, middleAmount); bytes memory modifiedData = replaceMiddleAmount(mayanData, middleAmount); (success, returnedData) = mayanProtocol.call{value: msg.value}(modifiedData); require(success, string(returnedData)); transferBackRemaining(tokenIn, amountIn); emit SwapAndForwardedERC20(tokenIn, amountIn, swapProtocol, middleToken, middleAmount, mayanProtocol, mayanData); } function replaceMiddleAmount(bytes calldata mayanData, uint256 middleAmount) internal pure returns(bytes memory) { require(mayanData.length >= 68, "Mayan data too short"); bytes memory modifiedData = new bytes(mayanData.length); // Copy the function selector and token in for (uint i = 0; i < 36; i++) { modifiedData[i] = mayanData[i]; } // Encode the amount and place it into the modified call data // Starting from byte 36 to byte 67 (32 bytes for uint256) bytes memory encodedAmount = abi.encode(middleAmount); for (uint i = 0; i < 32; i++) { modifiedData[i + 36] = encodedAmount[i]; } // Copy the rest of the original data after the first argument for (uint i = 68; i < mayanData.length; i++) { modifiedData[i] = mayanData[i]; } return modifiedData; } function maxApproveIfNeeded(address tokenAddr, address spender, uint256 amount) internal { IERC20 token = IERC20(tokenAddr); uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < amount) { token.safeApprove(spender, 0); token.safeApprove(spender, type(uint256).max); } } function execPermit( address token, address owner, PermitParams calldata permitParams ) internal { IERC20Permit(token).permit( owner, address(this), permitParams.value, permitParams.deadline, permitParams.v, permitParams.r, permitParams.s ); } function pullTokenIn( address tokenIn, uint256 amountIn, PermitParams calldata permitParams ) internal { uint256 allowance = IERC20(tokenIn).allowance(msg.sender, address(this)); if (allowance < amountIn) { execPermit(tokenIn, msg.sender, permitParams); } IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), amountIn); } function transferBackRemaining(address token, uint256 maxAmount) internal { uint256 remaining = IERC20(token).balanceOf(address(this)); if (remaining > 0 && remaining <= maxAmount) { IERC20(token).safeTransfer(msg.sender, remaining); } } function rescueToken(address token, uint256 amount, address to) public { require(msg.sender == guardian, 'only guardian'); IERC20(token).safeTransfer(to, amount); } function rescueEth(uint256 amount, address payable to) public { require(msg.sender == guardian, 'only guardian'); require(to != address(0), 'transfer to the zero address'); to.transfer(amount); } function changeGuardian(address newGuardian) public { require(msg.sender == guardian, 'only guardian'); nextGuardian = newGuardian; } function claimGuardian() public { require(msg.sender == nextGuardian, 'only next guardian'); guardian = nextGuardian; } function setSwapProtocol(address swapProtocol, bool enabled) public { require(msg.sender == guardian, 'only guardian'); swapProtocols[swapProtocol] = enabled; } function setMayanProtocol(address mayanProtocol, bool enabled) public { require(msg.sender == guardian, 'only guardian'); mayanProtocols[mayanProtocol] = enabled; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.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; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ 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)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ 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"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @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"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @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). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // 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 cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: Unlicense /* * @title Solidity Bytes Arrays Utils * @author Gonçalo Sá <[email protected]> * * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity. * The library lets you concatenate, slice and type cast bytes arrays both in memory and storage. */ pragma solidity >=0.8.0 <0.9.0; library BytesLib { function concat( bytes memory _preBytes, bytes memory _postBytes ) internal pure returns (bytes memory) { bytes memory tempBytes; assembly { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // Store the length of the first bytes array at the beginning of // the memory for tempBytes. let length := mload(_preBytes) mstore(tempBytes, length) // Maintain a memory counter for the current write location in the // temp bytes array by adding the 32 bytes for the array length to // the starting location. let mc := add(tempBytes, 0x20) // Stop copying when the memory counter reaches the length of the // first bytes array. let end := add(mc, length) for { // Initialize a copy counter to the start of the _preBytes data, // 32 bytes into its memory. let cc := add(_preBytes, 0x20) } lt(mc, end) { // Increase both counters by 32 bytes each iteration. mc := add(mc, 0x20) cc := add(cc, 0x20) } { // Write the _preBytes data into the tempBytes memory 32 bytes // at a time. mstore(mc, mload(cc)) } // Add the length of _postBytes to the current length of tempBytes // and store it as the new length in the first 32 bytes of the // tempBytes memory. length := mload(_postBytes) mstore(tempBytes, add(length, mload(tempBytes))) // Move the memory counter back from a multiple of 0x20 to the // actual end of the _preBytes data. mc := end // Stop copying when the memory counter reaches the new combined // length of the arrays. end := add(mc, length) for { let cc := add(_postBytes, 0x20) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } // Update the free-memory pointer by padding our last write location // to 32 bytes: add 31 bytes to the end of tempBytes to move to the // next 32 byte block, then round down to the nearest multiple of // 32. If the sum of the length of the two arrays is zero then add // one before rounding down to leave a blank 32 bytes (the length block with 0). mstore(0x40, and( add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31) // Round down to the nearest 32 bytes. )) } return tempBytes; } function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal { assembly { // Read the first 32 bytes of _preBytes storage, which is the length // of the array. (We don't need to use the offset into the slot // because arrays use the entire slot.) let fslot := sload(_preBytes.slot) // Arrays of 31 bytes or less have an even value in their slot, // while longer arrays have an odd value. The actual length is // the slot divided by two for odd values, and the lowest order // byte divided by two for even values. // If the slot is even, bitwise and the slot with 255 and divide by // two to get the length. If the slot is odd, bitwise and the slot // with -1 and divide by two. let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) let newlength := add(slength, mlength) // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage switch add(lt(slength, 32), lt(newlength, 32)) case 2 { // Since the new array still fits in the slot, we just need to // update the contents of the slot. // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length sstore( _preBytes.slot, // all the modifications to the slot are inside this // next block add( // we can just add to the slot contents because the // bytes we want to change are the LSBs fslot, add( mul( div( // load the bytes from memory mload(add(_postBytes, 0x20)), // zero all bytes to the right exp(0x100, sub(32, mlength)) ), // and now shift left the number of bytes to // leave space for the length in the slot exp(0x100, sub(32, newlength)) ), // increase length by the double of the memory // bytes length mul(mlength, 2) ) ) ) } case 1 { // The stored value fits in the slot, but the combined value // will exceed it. // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // The contents of the _postBytes array start 32 bytes into // the structure. Our first read should obtain the `submod` // bytes that can fit into the unused space in the last word // of the stored array. To get this, we read 32 bytes starting // from `submod`, so the data we read overlaps with the array // contents by `submod` bytes. Masking the lowest-order // `submod` bytes allows us to add that value directly to the // stored value. let submod := sub(32, slength) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore( sc, add( and( fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00 ), and(mload(mc), mask) ) ) for { mc := add(mc, 0x20) sc := add(sc, 1) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } default { // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) // Start copying to the last used word of the stored array. let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // Copy over the first `submod` bytes of the new data as in // case 1 above. let slengthmod := mod(slength, 32) let mlengthmod := mod(mlength, 32) let submod := sub(32, slengthmod) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore(sc, add(sload(sc), and(mload(mc), mask))) for { sc := add(sc, 1) mc := add(mc, 0x20) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } } } function slice( bytes memory _bytes, uint256 _start, uint256 _length ) internal pure returns (bytes memory) { require(_length + 31 >= _length, "slice_overflow"); require(_bytes.length >= _start + _length, "slice_outOfBounds"); bytes memory tempBytes; assembly { switch iszero(_length) case 0 { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // The first word of the slice result is potentially a partial // word read from the original array. To read it, we calculate // the length of that partial word and start copying that many // bytes into the array. The first word we copy will start with // data we don't care about, but the last `lengthmod` bytes will // land at the beginning of the contents of the new array. When // we're done copying, we overwrite the full first word with // the actual length of the slice. let lengthmod := and(_length, 31) // The multiplication in the next line is necessary // because when slicing multiples of 32 bytes (lengthmod == 0) // the following copy loop was copying the origin's length // and then ending prematurely not copying everything it should. let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod))) let end := add(mc, _length) for { // The multiplication in the next line has the same exact purpose // as the one above. let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } mstore(tempBytes, _length) //update free-memory pointer //allocating the array padded to 32 bytes like the compiler does now mstore(0x40, and(add(mc, 31), not(31))) } //if we want a zero-length slice let's just return a zero-length array default { tempBytes := mload(0x40) //zero out the 32 bytes slice we are about to return //we need to do it because Solidity does not garbage collect mstore(tempBytes, 0) mstore(0x40, add(tempBytes, 0x20)) } } return tempBytes; } function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) { require(_bytes.length >= _start + 20, "toAddress_outOfBounds"); address tempAddress; assembly { tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000) } return tempAddress; } function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) { require(_bytes.length >= _start + 1 , "toUint8_outOfBounds"); uint8 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x1), _start)) } return tempUint; } function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) { require(_bytes.length >= _start + 2, "toUint16_outOfBounds"); uint16 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x2), _start)) } return tempUint; } function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) { require(_bytes.length >= _start + 4, "toUint32_outOfBounds"); uint32 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x4), _start)) } return tempUint; } function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) { require(_bytes.length >= _start + 8, "toUint64_outOfBounds"); uint64 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x8), _start)) } return tempUint; } function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) { require(_bytes.length >= _start + 12, "toUint96_outOfBounds"); uint96 tempUint; assembly { tempUint := mload(add(add(_bytes, 0xc), _start)) } return tempUint; } function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) { require(_bytes.length >= _start + 16, "toUint128_outOfBounds"); uint128 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x10), _start)) } return tempUint; } function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) { require(_bytes.length >= _start + 32, "toUint256_outOfBounds"); uint256 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x20), _start)) } return tempUint; } function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) { require(_bytes.length >= _start + 32, "toBytes32_outOfBounds"); bytes32 tempBytes32; assembly { tempBytes32 := mload(add(add(_bytes, 0x20), _start)) } return tempBytes32; } function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let mc := add(_preBytes, 0x20) let end := add(mc, length) for { let cc := add(_postBytes, 0x20) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) } eq(add(lt(mc, end), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } } default { // unsuccess: success := 0 } } return success; } function equalStorage( bytes storage _preBytes, bytes memory _postBytes ) internal view returns (bool) { bool success = true; assembly { // we know _preBytes_offset is 0 let fslot := sload(_preBytes.slot) // Decode the length of the stored array like in concatStorage(). let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) // if lengths don't match the arrays are not equal switch eq(slength, mlength) case 1 { // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage if iszero(iszero(slength)) { switch lt(slength, 32) case 1 { // blank the last byte which is the length fslot := mul(div(fslot, 0x100), 0x100) if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) { // unsuccess: success := 0 } } default { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := keccak256(0x0, 0x20) let mc := add(_postBytes, 0x20) let end := add(mc, mlength) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) for {} eq(add(lt(mc, end), cb), 2) { sc := add(sc, 1) mc := add(mc, 0x20) } { if iszero(eq(sload(sc), mload(mc))) { // unsuccess: success := 0 cb := 0 } } } } } default { // unsuccess: success := 0 } } return success; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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payable","name":"to","type":"address"}],"name":"rescueEth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"rescueToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"mayanProtocol","type":"address"},{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setMayanProtocol","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"swapProtocol","type":"address"},{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setSwapProtocol","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"components":[{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct 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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000933e3922e04d47a466e60a20e486b372b64f1ea8000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001000000000000000000000000111111125421ca6dc452d289314280a0f8842a650000000000000000000000000000000000000000000000000000000000000001000000000000000000000000a4ef5efb2f42edc4f7f5f3ab5557455db55e2464
-----Decoded View---------------
Arg [0] : _guardian (address): 0x933E3922E04d47a466e60A20e486b372B64F1Ea8
Arg [1] : _swapProtocols (address[]): 0x111111125421cA6dc452d289314280a0f8842A65
Arg [2] : _mayanProtocols (address[]): 0xa4EF5EFB2F42edC4f7F5F3Ab5557455DB55E2464
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000933e3922e04d47a466e60a20e486b372b64f1ea8
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [4] : 000000000000000000000000111111125421ca6dc452d289314280a0f8842a65
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [6] : 000000000000000000000000a4ef5efb2f42edc4f7f5f3ab5557455db55e2464
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Multichain Portfolio | 31 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
SCROLL | 100.00% | $2,678.31 | 0.211 | $565.12 |
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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.