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Contract Name:
LooksRareModule
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import {IERC1155} from "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol"; import {BaseExchangeModule} from "./BaseExchangeModule.sol"; import {BaseModule} from "../BaseModule.sol"; import {ILooksRare} from "../../../interfaces/ILooksRare.sol"; // Notes: // - supports filling listings (both ERC721/ERC1155 but only ETH-denominated) // - supports filling offers (both ERC721/ERC1155) contract LooksRareModule is BaseExchangeModule { using SafeERC20 for IERC20; // --- Fields --- ILooksRare public constant EXCHANGE = ILooksRare(0x59728544B08AB483533076417FbBB2fD0B17CE3a); address public constant ERC721_TRANSFER_MANAGER = 0xf42aa99F011A1fA7CDA90E5E98b277E306BcA83e; address public constant ERC1155_TRANSFER_MANAGER = 0xFED24eC7E22f573c2e08AEF55aA6797Ca2b3A051; bytes4 public constant ERC721_INTERFACE = 0x80ac58cd; bytes4 public constant ERC1155_INTERFACE = 0xd9b67a26; // --- Constructor --- constructor(address owner, address router) BaseModule(owner) BaseExchangeModule(router) {} // --- Single ETH listing --- function acceptETHListing( ILooksRare.TakerOrder calldata takerBid, ILooksRare.MakerOrder calldata makerAsk, ETHListingParams calldata params, Fee[] calldata fees ) external payable nonReentrant refundETHLeftover(params.refundTo) chargeETHFees(fees, params.amount) { // Execute fill _buy( takerBid, makerAsk, params.fillTo, params.revertIfIncomplete, params.amount ); } // --- Multiple ETH listings --- function acceptETHListings( ILooksRare.TakerOrder[] calldata takerBids, ILooksRare.MakerOrder[] calldata makerAsks, ETHListingParams calldata params, Fee[] calldata fees ) external payable nonReentrant refundETHLeftover(params.refundTo) chargeETHFees(fees, params.amount) { // LooksRare does not support batch filling so we fill orders one by one for (uint256 i = 0; i < takerBids.length; ) { // Use `memory` to avoid `Stack too deep` errors ILooksRare.TakerOrder memory takerBid = takerBids[i]; // Execute fill _buy( takerBids[i], makerAsks[i], params.fillTo, params.revertIfIncomplete, takerBid.price ); unchecked { ++i; } } } // --- [ERC721] Single offer --- function acceptERC721Offer( ILooksRare.TakerOrder calldata takerAsk, ILooksRare.MakerOrder calldata makerBid, OfferParams calldata params, Fee[] calldata fees ) external nonReentrant { IERC721 collection = IERC721(address(makerBid.collection)); // Approve the transfer manager if needed _approveERC721IfNeeded(collection, ERC721_TRANSFER_MANAGER); // Execute the fill _sell( takerAsk, makerBid, params.fillTo, params.revertIfIncomplete, fees ); // Refund any ERC721 leftover _sendAllERC721(params.refundTo, collection, takerAsk.tokenId); } // --- [ERC1155] Single offer --- function acceptERC1155Offer( ILooksRare.TakerOrder calldata takerAsk, ILooksRare.MakerOrder calldata makerBid, OfferParams calldata params, Fee[] calldata fees ) external nonReentrant { IERC1155 collection = IERC1155(address(makerBid.collection)); // Approve the transfer manager if needed _approveERC1155IfNeeded(collection, ERC1155_TRANSFER_MANAGER); // Execute the fill _sell( takerAsk, makerBid, params.fillTo, params.revertIfIncomplete, fees ); // Refund any ERC1155 leftover _sendAllERC1155(params.refundTo, collection, takerAsk.tokenId); } // --- ERC721 / ERC1155 hooks --- // Single token offer acceptance can be done approval-less by using the // standard `safeTransferFrom` method together with specifying data for // further contract calls. An example: // `safeTransferFrom( // 0xWALLET, // 0xMODULE, // TOKEN_ID, // 0xABI_ENCODED_ROUTER_EXECUTION_CALLDATA_FOR_OFFER_ACCEPTANCE // )` function onERC721Received( address, // operator, address, // from uint256, // tokenId, bytes calldata data ) external returns (bytes4) { if (data.length > 0) { _makeCall(router, data, 0); } return this.onERC721Received.selector; } function onERC1155Received( address, // operator address, // from uint256, // tokenId uint256, // amount bytes calldata data ) external returns (bytes4) { if (data.length > 0) { _makeCall(router, data, 0); } return this.onERC1155Received.selector; } // --- Internal --- function _buy( ILooksRare.TakerOrder calldata takerBid, ILooksRare.MakerOrder calldata makerAsk, address receiver, bool revertIfIncomplete, uint256 value ) internal { // Execute the fill try EXCHANGE.matchAskWithTakerBidUsingETHAndWETH{value: value}( takerBid, makerAsk ) { IERC165 collection = makerAsk.collection; // Forward any token to the specified receiver bool isERC721 = collection.supportsInterface(ERC721_INTERFACE); if (isERC721) { IERC721(address(collection)).safeTransferFrom( address(this), receiver, takerBid.tokenId ); } else { bool isERC1155 = collection.supportsInterface( ERC1155_INTERFACE ); if (isERC1155) { IERC1155(address(collection)).safeTransferFrom( address(this), receiver, takerBid.tokenId, makerAsk.amount, "" ); } } } catch { // Revert if specified if (revertIfIncomplete) { revert UnsuccessfulFill(); } } } function _sell( ILooksRare.TakerOrder calldata takerAsk, ILooksRare.MakerOrder calldata makerBid, address receiver, bool revertIfIncomplete, Fee[] calldata fees ) internal { // Execute the fill try EXCHANGE.matchBidWithTakerAsk(takerAsk, makerBid) { // Pay fees uint256 feesLength = fees.length; for (uint256 i; i < feesLength; ) { Fee memory fee = fees[i]; _sendERC20(fee.recipient, fee.amount, makerBid.currency); unchecked { ++i; } } // Forward any left payment to the specified receiver _sendAllERC20(receiver, makerBid.currency); } catch { // Revert if specified if (revertIfIncomplete) { revert UnsuccessfulFill(); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC1155 compliant contract, as defined in the * https://eips.ethereum.org/EIPS/eip-1155[EIP]. * * _Available since v3.1._ */ interface IERC1155 is IERC165 { /** * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`. */ event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); /** * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all * transfers. */ event TransferBatch( address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values ); /** * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to * `approved`. */ event ApprovalForAll(address indexed account, address indexed operator, bool approved); /** * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI. * * If an {URI} event was emitted for `id`, the standard * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value * returned by {IERC1155MetadataURI-uri}. */ event URI(string value, uint256 indexed id); /** * @dev Returns the amount of tokens of token type `id` owned by `account`. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) external view returns (uint256); /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory); /** * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`, * * Emits an {ApprovalForAll} event. * * Requirements: * * - `operator` cannot be the caller. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns true if `operator` is approved to transfer ``account``'s tokens. * * See {setApprovalForAll}. */ function isApprovedForAll(address account, address operator) external view returns (bool); /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes calldata data ) external; /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function safeBatchTransferFrom( address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-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 v4.6.0) (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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/draft-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; 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)); } } 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"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol"; interface ILooksRare { struct MakerOrder { bool isOrderAsk; address signer; IERC165 collection; uint256 price; uint256 tokenId; uint256 amount; address strategy; IERC20 currency; uint256 nonce; uint256 startTime; uint256 endTime; uint256 minPercentageToAsk; bytes params; uint8 v; bytes32 r; bytes32 s; } struct TakerOrder { bool isOrderAsk; address taker; uint256 price; uint256 tokenId; uint256 minPercentageToAsk; bytes params; } function transferSelectorNFT() external view returns (address); function matchAskWithTakerBidUsingETHAndWETH( TakerOrder calldata takerBid, MakerOrder calldata makerAsk ) external payable; function matchAskWithTakerBid( TakerOrder calldata takerBid, MakerOrder calldata makerAsk ) external payable; function matchBidWithTakerAsk( TakerOrder calldata takerAsk, MakerOrder calldata makerBid ) external; } interface ILooksRareTransferSelectorNFT { function TRANSFER_MANAGER_ERC721() external view returns (address); function TRANSFER_MANAGER_ERC1155() external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; // Adapted from: // https://github.com/boringcrypto/BoringSolidity/blob/e74c5b22a61bfbadd645e51a64aa1d33734d577a/contracts/BoringOwnable.sol contract TwoStepOwnable { // --- Fields --- address public owner; address public pendingOwner; // --- Events --- event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); // --- Errors --- error InvalidParams(); error Unauthorized(); // --- Modifiers --- modifier onlyOwner() { if (msg.sender != owner) { revert Unauthorized(); } _; } // --- Constructor --- constructor(address initialOwner) { owner = initialOwner; emit OwnershipTransferred(address(0), initialOwner); } // --- Methods --- function transferOwnership(address newOwner) public onlyOwner { pendingOwner = newOwner; } function claimOwnership() public { address _pendingOwner = pendingOwner; if (msg.sender != _pendingOwner) { revert Unauthorized(); } owner = _pendingOwner; pendingOwner = address(0); emit OwnershipTransferred(owner, _pendingOwner); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {TwoStepOwnable} from "../../misc/TwoStepOwnable.sol"; // Notes: // - includes common helpers useful for all modules abstract contract BaseModule is TwoStepOwnable, ReentrancyGuard { using SafeERC20 for IERC20; // --- Events --- event CallExecuted(address target, bytes data, uint256 value); // --- Errors --- error UnsuccessfulCall(); error UnsuccessfulPayment(); error WrongParams(); // --- Constructor --- constructor(address owner) TwoStepOwnable(owner) {} // --- Owner --- // To be able to recover anything that gets stucked by mistake in the module, // we allow the owner to perform any arbitrary call. Since the goal is to be // stateless, this should only happen in case of mistakes. In addition, this // method is also useful for withdrawing any earned trading rewards. function makeCalls( address[] calldata targets, bytes[] calldata data, uint256[] calldata values ) external payable onlyOwner nonReentrant { uint256 length = targets.length; for (uint256 i = 0; i < length; ) { _makeCall(targets[i], data[i], values[i]); emit CallExecuted(targets[i], data[i], values[i]); unchecked { ++i; } } } // --- Helpers --- function _sendETH(address to, uint256 amount) internal { if (amount > 0) { (bool success, ) = payable(to).call{value: amount}(""); if (!success) { revert UnsuccessfulPayment(); } } } function _sendERC20( address to, uint256 amount, IERC20 token ) internal { if (amount > 0) { token.safeTransfer(to, amount); } } function _makeCall( address target, bytes memory data, uint256 value ) internal { (bool success, ) = payable(target).call{value: value}(data); if (!success) { revert UnsuccessfulCall(); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import {IERC1155} from "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import {BaseModule} from "../BaseModule.sol"; // Notes: // - includes common helpers useful for all marketplace/exchange modules abstract contract BaseExchangeModule is BaseModule { using SafeERC20 for IERC20; // --- Structs --- // Every fill execution has the following parameters: // - `fillTo`: the recipient of the received items // - `refundTo`: the recipient of any refunds // - `revertIfIncomplete`: whether to revert or skip unsuccessful fills // The below `ETHListingParams` and `ERC20ListingParams` rely on the // off-chain execution encoder to ensure that the orders filled with // the passed in listing parameters exactly match (eg. order amounts // and payment tokens match). struct ETHListingParams { address fillTo; address refundTo; bool revertIfIncomplete; // The total amount of ETH to be provided when filling uint256 amount; } struct ERC20ListingParams { address fillTo; address refundTo; bool revertIfIncomplete; // The ERC20 payment token for the listings IERC20 token; // The total amount of `token` to be provided when filling uint256 amount; } struct OfferParams { address fillTo; address refundTo; bool revertIfIncomplete; } struct Fee { address recipient; uint256 amount; } // --- Fields --- address public immutable router; // --- Errors --- error UnsuccessfulFill(); // --- Constructor --- constructor(address routerAddress) { router = routerAddress; } // --- Modifiers --- modifier refundETHLeftover(address refundTo) { _; uint256 leftover = address(this).balance; if (leftover > 0) { _sendETH(refundTo, leftover); } } modifier refundERC20Leftover(address refundTo, IERC20 token) { _; uint256 leftover = token.balanceOf(address(this)); if (leftover > 0) { token.safeTransfer(refundTo, leftover); } } modifier chargeETHFees(Fee[] calldata fees, uint256 amount) { if (fees.length == 0) { _; } else { uint256 balanceBefore = address(this).balance; _; uint256 length = fees.length; if (length > 0) { uint256 balanceAfter = address(this).balance; uint256 actualPaid = balanceBefore - balanceAfter; uint256 actualFee; for (uint256 i = 0; i < length; ) { // Adjust the fee to what was actually paid actualFee = (fees[i].amount * actualPaid) / amount; if (actualFee > 0) { _sendETH(fees[i].recipient, actualFee); } unchecked { ++i; } } } } } modifier chargeERC20Fees( Fee[] calldata fees, IERC20 token, uint256 amount ) { if (fees.length == 0) { _; } else { uint256 balanceBefore = token.balanceOf(address(this)); _; uint256 length = fees.length; if (length > 0) { uint256 balanceAfter = token.balanceOf(address(this)); uint256 actualPaid = balanceBefore - balanceAfter; uint256 actualFee; for (uint256 i = 0; i < length; ) { // Adjust the fee to what was actually paid actualFee = (fees[i].amount * actualPaid) / amount; if (actualFee > 0) { token.safeTransfer(fees[i].recipient, actualFee); } unchecked { ++i; } } } } } // --- Helpers --- function _sendAllETH(address to) internal { _sendETH(to, address(this).balance); } function _sendAllERC20(address to, IERC20 token) internal { uint256 balance = token.balanceOf(address(this)); if (balance > 0) { token.safeTransfer(to, balance); } } function _sendAllERC721( address to, IERC721 token, uint256 tokenId ) internal { if (token.ownerOf(tokenId) == address(this)) { token.safeTransferFrom(address(this), to, tokenId); } } function _sendAllERC1155( address to, IERC1155 token, uint256 tokenId ) internal { uint256 balance = token.balanceOf(address(this), tokenId); if (balance > 0) { token.safeTransferFrom(address(this), to, tokenId, balance, ""); } } function _approveERC20IfNeeded( IERC20 token, address spender, uint256 amount ) internal { uint256 allowance = token.allowance(address(this), spender); if (allowance < amount) { token.approve(spender, amount - allowance); } } function _approveERC721IfNeeded(IERC721 token, address operator) internal { bool isApproved = token.isApprovedForAll(address(this), operator); if (!isApproved) { token.setApprovalForAll(operator, true); } } function _approveERC1155IfNeeded(IERC1155 token, address operator) internal { bool isApproved = token.isApprovedForAll(address(this), operator); if (!isApproved) { token.setApprovalForAll(operator, true); } } }
{ "viaIR": true, "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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BaseExchangeModule.Fee[]","name":"fees","type":"tuple[]"}],"name":"acceptETHListings","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"claimOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"targets","type":"address[]"},{"internalType":"bytes[]","name":"data","type":"bytes[]"},{"internalType":"uint256[]","name":"values","type":"uint256[]"}],"name":"makeCalls","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC1155Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"router","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","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)
000000000000000000000000f3d63166f0ca56c3c1a3508fce03ff0cf3fb691e000000000000000000000000178a86d36d89c7fdebea90b739605da7b131ff6a
-----Decoded View---------------
Arg [0] : owner (address): 0xf3d63166F0Ca56C3c1A3508FcE03Ff0Cf3Fb691e
Arg [1] : router (address): 0x178A86D36D89c7FDeBeA90b739605da7B131ff6A
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000f3d63166f0ca56c3c1a3508fce03ff0cf3fb691e
Arg [1] : 000000000000000000000000178a86d36d89c7fdebea90b739605da7b131ff6a
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Multichain Portfolio | 30 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.