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Matching RFQ By ... | 16226839 | 625 days ago | IN | 0 ETH | 0.02809123 | ||||
Matching RFQ By ... | 16209066 | 628 days ago | IN | 0 ETH | 0.00482213 | ||||
Matching RFQ By ... | 16067020 | 648 days ago | IN | 0 ETH | 0.00400064 | ||||
Matching RFQ By ... | 15919209 | 668 days ago | IN | 0 ETH | 0.01241142 | ||||
Matching RFQ By ... | 15919041 | 668 days ago | IN | 0 ETH | 0.00688628 | ||||
Matching RFQ By ... | 15852250 | 678 days ago | IN | 0 ETH | 0.00409716 | ||||
Matching RFQ By ... | 15786408 | 687 days ago | IN | 0 ETH | 0.00772825 | ||||
Matching RFQ By ... | 15768440 | 689 days ago | IN | 0 ETH | 0.0134906 | ||||
Matching RFQ By ... | 15768363 | 689 days ago | IN | 0 ETH | 0.00963088 | ||||
Matching RFQ By ... | 15712618 | 697 days ago | IN | 0 ETH | 0.00861381 | ||||
Matching RFQ By ... | 15516322 | 725 days ago | IN | 0 ETH | 0.00384367 | ||||
Matching RFQ By ... | 15430640 | 739 days ago | IN | 0 ETH | 0.00386065 | ||||
Matching RFQ By ... | 15371139 | 749 days ago | IN | 0 ETH | 0.01115924 | ||||
Matching RFQ By ... | 15371054 | 749 days ago | IN | 0 ETH | 0.00538772 | ||||
Matching RFQ By ... | 15370644 | 749 days ago | IN | 0 ETH | 0.00365337 | ||||
Matching RFQ By ... | 15370533 | 749 days ago | IN | 0 ETH | 0.00415015 | ||||
Matching RFQ By ... | 15358654 | 751 days ago | IN | 0 ETH | 0.00492729 | ||||
Matching RFQ By ... | 15319422 | 757 days ago | IN | 0 ETH | 0.00264766 | ||||
Matching RFQ By ... | 15274861 | 764 days ago | IN | 0 ETH | 0.01633731 | ||||
Matching RFQ By ... | 15197639 | 776 days ago | IN | 0 ETH | 0.00200827 | ||||
Matching RFQ By ... | 15197619 | 776 days ago | IN | 0 ETH | 0.00388952 | ||||
Matching RFQ By ... | 15197616 | 776 days ago | IN | 0 ETH | 0.00310261 | ||||
Matching RFQ By ... | 15197468 | 776 days ago | IN | 0 ETH | 0.0019548 | ||||
Matching RFQ By ... | 15175713 | 779 days ago | IN | 0 ETH | 0.00654675 | ||||
Matching RFQ By ... | 15133534 | 786 days ago | IN | 0 ETH | 0.00759385 |
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Contract Name:
DODOGaslessTrading
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)
/* Copyright 2021 DODO ZOO. SPDX-License-Identifier: Apache-2.0 */ pragma solidity 0.8.4; import "@openzeppelin/contracts/access/Ownable.sol"; import {IDODOApproveProxy} from "./intf/IDODOApproveProxy.sol"; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {SafeERC20} from "./lib/SafeERC20.sol"; import {EIP712} from "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol"; import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; /** * @title DODOGaslessTrading * @author DODO Breeder * @notice DODO Gasless Trading is an insurance service. It is part of DLOP, DODO Limit Order Protocol. * The trader signs the order and sends it to DODO's backend service. DODO guarantees that the order * will be submitted and filled without any slippage. * DODO does not act directly as a counterparty to the trader, but integrates all the on-chain liquidity * through DODO's routing system. If the final result is better than the original order, DODO collects * these additional token as a premium. Otherwise DODO compensates the difference to the trader. * When compensating, DODO will try to pay toToken first. If the insurance inventory is not enough * to pay, then the compensation will be paid in the fromToken. */ struct GaslessOrder { address signer; address fromToken; address toToken; uint256 fromAmount; uint256 toAmount; uint256 expiration; uint256 slot; } contract DODOGaslessTrading is EIP712("DODO Limit Order Protocol", "1"), Ownable { using SafeERC20 for IERC20; bytes32 public constant GASLESS_ORDER_TYPEHASH = keccak256( "Order(address signer,address fromToken,address toToken,uint256 fromAmount,uint256 toAmount,uint256 expiration,uint256 slot)" ); //=============== Storage =============== address public _INSURANCE_; address public immutable _DODO_APPROVE_; address public immutable _DODO_APPROVE_PROXY_; mapping(address => bool) public _IS_ADMIN_; mapping(bytes32 => bool) public _IS_FILLED_; //=============== Events =============== event AddAdmin(address admin); event RemoveAdmin(address admin); event ChangeInsurance(address newInsurance); event GaslessOrderFilled(bytes32 orderHash); //=============== Functions =============== constructor( address owner, address insurance, address dodoApprove, address dodoApproveProxy ) { transferOwnership(owner); _INSURANCE_ = insurance; _DODO_APPROVE_ = dodoApprove; _DODO_APPROVE_PROXY_ = dodoApproveProxy; } function matchingRFQByPlatform( GaslessOrder calldata order, bytes calldata signature, bytes calldata routeData, address route, uint256 maxCompensation ) external { require(_IS_ADMIN_[msg.sender], "ACCESS_DENIED"); // verify order bytes32 orderHash = _hashOrder(order); require( ECDSA.recover(orderHash, signature) == order.signer, "DLOP:INVALID_SIGNATURE" ); require(order.expiration > block.timestamp, "DLOP:ORDER_EXPIRED"); require(!_IS_FILLED_[orderHash], "DLOP:ORDER_FILLED"); // flash swap: transfer trader's FROM token in IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens( order.fromToken, order.signer, address(this), order.fromAmount ); // swap using DODO Route uint256 swapResult; { uint256 originToTokenBalance = IERC20(order.toToken).balanceOf( address(this) ); _approveMax( IERC20(order.fromToken), _DODO_APPROVE_, order.fromAmount ); require(route != _DODO_APPROVE_PROXY_, "DLOP:ROUTE_ADDRESS_REJECT"); (bool success, ) = route.call(routeData); require(success, "DLOP:DODO_ROUTE_FAILED"); uint256 toTokenBalance = IERC20(order.toToken).balanceOf( address(this) ); swapResult = toTokenBalance - originToTokenBalance; } // pay trader TO token if (swapResult >= order.toAmount) { // fund extra TO token to insurance IERC20(order.toToken).safeTransfer(order.signer, order.toAmount); IERC20(order.toToken).safeTransfer( _INSURANCE_, IERC20(order.toToken).balanceOf(address(this)) ); } else { IERC20(order.toToken).safeTransfer(order.signer, swapResult); // compensate the trader uint256 compensation = order.toAmount - swapResult; require( compensation <= maxCompensation, "DLOP:COMPENSATION_EXCEED" ); if (IERC20(order.toToken).balanceOf(_INSURANCE_) >= compensation) { // compensate TO token if balance enough IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens( order.toToken, _INSURANCE_, order.signer, compensation ); } else { // otherwise compensate FROM token with the price signed in order IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens( order.fromToken, _INSURANCE_, order.signer, (compensation * order.fromAmount) / order.toAmount ); } } _IS_FILLED_[orderHash] = true; emit GaslessOrderFilled(orderHash); } //============ Ownable ============ function addAdmin(address userAddr) external onlyOwner { _IS_ADMIN_[userAddr] = true; emit AddAdmin(userAddr); } function removeAdmin(address userAddr) external onlyOwner { _IS_ADMIN_[userAddr] = false; emit RemoveAdmin(userAddr); } function changeInsurance(address newInsurance) external onlyOwner { _INSURANCE_ = newInsurance; emit ChangeInsurance(newInsurance); } //============ Private ============ function _approveMax( IERC20 token, address to, uint256 amount ) private { uint256 allowance = token.allowance(address(this), to); if (allowance < amount) { if (allowance > 0) { token.safeApprove(to, 0); } token.safeApprove(to, type(uint256).max); } } function _hashOrder(GaslessOrder memory order) private view returns (bytes32) { // keccak256( // abi.encode( // GASLESS_ORDER_TYPEHASH, // order.signer, // order.fromToken, // order.toToken, // order.fromAmount, // order.toAmount // order.expiration, // order.slot // ) // ) bytes32 structHash; bytes32 orderTypeHash = GASLESS_ORDER_TYPEHASH; assembly { let start := sub(order, 32) let tmp := mload(start) // 256 = (1+7)*32 // [0...32) bytes: GASLESS_ORDER_TYPEHASH // [32...256) bytes: order mstore(start, orderTypeHash) structHash := keccak256(start, 256) mstore(start, tmp) } return _hashTypedDataV4(structHash); } }
// 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); } }
/* Copyright 2020 DODO ZOO. SPDX-License-Identifier: Apache-2.0 */ pragma solidity 0.8.4; interface IDODOApproveProxy { function claimTokens(address token,address who,address dest,uint256 amount) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (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); }
/* Copyright 2020 DODO ZOO. SPDX-License-Identifier: Apache-2.0 This is a simplified version of OpenZepplin's SafeERC20 library */ pragma solidity 0.8.4; pragma experimental ABIEncoderV2; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {SafeMath} from "./SafeMath.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn( token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value) ); } function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol) pragma solidity ^0.8.0; import "./ECDSA.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * _Available since v3.4._ */ abstract contract EIP712 { /* solhint-disable var-name-mixedcase */ // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _CACHED_DOMAIN_SEPARATOR; uint256 private immutable _CACHED_CHAIN_ID; address private immutable _CACHED_THIS; bytes32 private immutable _HASHED_NAME; bytes32 private immutable _HASHED_VERSION; bytes32 private immutable _TYPE_HASH; /* solhint-enable var-name-mixedcase */ /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { bytes32 hashedName = keccak256(bytes(name)); bytes32 hashedVersion = keccak256(bytes(version)); bytes32 typeHash = keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ); _HASHED_NAME = hashedName; _HASHED_VERSION = hashedVersion; _CACHED_CHAIN_ID = block.chainid; _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion); _CACHED_THIS = address(this); _TYPE_HASH = typeHash; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) { return _CACHED_DOMAIN_SEPARATOR; } else { return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION); } } function _buildDomainSeparator( bytes32 typeHash, bytes32 nameHash, bytes32 versionHash ) private view returns (bytes32) { return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts 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; } }
/* Copyright 2020 DODO ZOO. SPDX-License-Identifier: Apache-2.0 */ pragma solidity 0.8.4; pragma experimental ABIEncoderV2; /** * @title SafeMath * @author DODO Breeder * * @notice Math operations with safety checks that revert on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "MUL_ERROR"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "DIVIDING_ERROR"); return a / b; } function divCeil(uint256 a, uint256 b) internal pure returns (uint256) { uint256 quotient = div(a, b); uint256 remainder = a - quotient * b; if (remainder > 0) { return quotient + 1; } else { return quotient; } } function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SUB_ERROR"); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "ADD_ERROR"); return c; } function sqrt(uint256 x) internal pure returns (uint256 y) { uint256 z = x / 2 + 1; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"insurance","type":"address"},{"internalType":"address","name":"dodoApprove","type":"address"},{"internalType":"address","name":"dodoApproveProxy","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"admin","type":"address"}],"name":"AddAdmin","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newInsurance","type":"address"}],"name":"ChangeInsurance","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"orderHash","type":"bytes32"}],"name":"GaslessOrderFilled","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":"address","name":"admin","type":"address"}],"name":"RemoveAdmin","type":"event"},{"inputs":[],"name":"GASLESS_ORDER_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_DODO_APPROVE_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_DODO_APPROVE_PROXY_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_INSURANCE_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"_IS_ADMIN_","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"_IS_FILLED_","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddr","type":"address"}],"name":"addAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newInsurance","type":"address"}],"name":"changeInsurance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"fromToken","type":"address"},{"internalType":"address","name":"toToken","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"},{"internalType":"uint256","name":"toAmount","type":"uint256"},{"internalType":"uint256","name":"expiration","type":"uint256"},{"internalType":"uint256","name":"slot","type":"uint256"}],"internalType":"struct GaslessOrder","name":"order","type":"tuple"},{"internalType":"bytes","name":"signature","type":"bytes"},{"internalType":"bytes","name":"routeData","type":"bytes"},{"internalType":"address","name":"route","type":"address"},{"internalType":"uint256","name":"maxCompensation","type":"uint256"}],"name":"matchingRFQByPlatform","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddr","type":"address"}],"name":"removeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","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)
000000000000000000000000b37136b338c6cc0e459a35fe9aa036f6b5a147c000000000000000000000000021636e4e877ef8f948d079381811ee6e5f084628000000000000000000000000cb859ea579b28e02b87a1fde08d087ab9dbe5149000000000000000000000000335ac99bb3e51bdbf22025f092ebc1cf2c5cc619
-----Decoded View---------------
Arg [0] : owner (address): 0xb37136B338C6cC0E459A35fe9Aa036f6b5A147c0
Arg [1] : insurance (address): 0x21636e4E877EF8F948d079381811eE6e5f084628
Arg [2] : dodoApprove (address): 0xCB859eA579b28e02B87A1FDE08d087ab9dbE5149
Arg [3] : dodoApproveProxy (address): 0x335aC99bb3E51BDbF22025f092Ebc1Cf2c5cC619
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000b37136b338c6cc0e459a35fe9aa036f6b5a147c0
Arg [1] : 00000000000000000000000021636e4e877ef8f948d079381811ee6e5f084628
Arg [2] : 000000000000000000000000cb859ea579b28e02b87a1fde08d087ab9dbe5149
Arg [3] : 000000000000000000000000335ac99bb3e51bdbf22025f092ebc1cf2c5cc619
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Multichain Portfolio | 26 Chains
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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.