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Latest 25 from a total of 816 transactions
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Approve | 20509787 | 9 days ago | IN | 0 ETH | 0.00003902 | ||||
Withdraw | 18271147 | 322 days ago | IN | 0 ETH | 0.00332759 | ||||
Withdraw | 18092996 | 347 days ago | IN | 0 ETH | 0.04905331 | ||||
Withdraw | 18092988 | 347 days ago | IN | 0 ETH | 0.07178765 | ||||
Withdraw | 18092979 | 347 days ago | IN | 0 ETH | 0.08261185 | ||||
Withdraw | 18092972 | 347 days ago | IN | 0 ETH | 0.08832853 | ||||
Withdraw | 18092965 | 347 days ago | IN | 0 ETH | 0.07659131 | ||||
Withdraw | 18092954 | 347 days ago | IN | 0 ETH | 0.06665048 | ||||
Withdraw | 18092930 | 347 days ago | IN | 0 ETH | 0.06043838 | ||||
Withdraw | 18092907 | 347 days ago | IN | 0 ETH | 0.10914532 | ||||
Withdraw | 18092898 | 347 days ago | IN | 0 ETH | 0.10479012 | ||||
Withdraw | 18092890 | 347 days ago | IN | 0 ETH | 0.07221918 | ||||
Withdraw | 18078145 | 349 days ago | IN | 0 ETH | 0.01375073 | ||||
Withdraw | 18078140 | 349 days ago | IN | 0 ETH | 0.04701631 | ||||
Withdraw | 18078132 | 349 days ago | IN | 0 ETH | 0.05181595 | ||||
Deposit | 18073007 | 350 days ago | IN | 0 ETH | 0.00383614 | ||||
Withdraw | 18072995 | 350 days ago | IN | 0 ETH | 0.0023492 | ||||
Withdraw | 18072596 | 350 days ago | IN | 0 ETH | 0.08325557 | ||||
Withdraw | 18072590 | 350 days ago | IN | 0 ETH | 0.07297269 | ||||
Withdraw | 18072582 | 350 days ago | IN | 0 ETH | 0.06556668 | ||||
Withdraw | 18072545 | 350 days ago | IN | 0 ETH | 0.05520967 | ||||
Withdraw | 18072530 | 350 days ago | IN | 0 ETH | 0.04585883 | ||||
Withdraw | 18072515 | 350 days ago | IN | 0 ETH | 0.02028976 | ||||
Withdraw | 18072509 | 350 days ago | IN | 0 ETH | 0.01812609 | ||||
Transfer | 17993326 | 361 days ago | IN | 0 ETH | 0.00133975 |
Latest 1 internal transaction
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Parent Transaction Hash | Block | From | To | |||
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16651058 | 550 days ago | Contract Creation | 0 ETH |
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Contract Name:
ERC721Pool
Compiler Version
v0.8.13+commit.abaa5c0e
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity >=0.8.4; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; import "./IERC721Pool.sol"; import "./ERC20Wnft.sol"; /// @title ERC721Pool /// @author Hifi contract ERC721Pool is IERC721Pool, ERC20Wnft { using EnumerableSet for EnumerableSet.UintSet; /// INTERNAL STORAGE /// /// @dev The asset token IDs held in the pool. EnumerableSet.UintSet internal holdings; /// CONSTRUCTOR /// constructor() ERC20Wnft() { // solhint-disable-previous-line no-empty-blocks } /// PUBLIC CONSTANT FUNCTIONS /// /// @inheritdoc IERC721Pool function holdingAt(uint256 index) external view override returns (uint256) { return holdings.at(index); } /// @inheritdoc IERC721Pool function holdingsLength() external view override returns (uint256) { return holdings.length(); } /// PUBLIC NON-CONSTANT FUNCTIONS /// /// @inheritdoc IERC721Pool function deposit(uint256[] calldata ids) external override { if (ids.length == 0) { revert ERC721Pool__InsufficientIn(); } for (uint256 i; i < ids.length; ) { uint256 id = ids[i]; require(holdings.add(id)); IERC721(asset).transferFrom(msg.sender, address(this), id); unchecked { ++i; } } _mint(msg.sender, ids.length * 10**18); emit Deposit(ids, msg.sender); } /// @inheritdoc IERC721Pool function withdraw(uint256[] calldata ids) public override { if (ids.length == 0) { revert ERC721Pool__InsufficientIn(); } _burn(msg.sender, ids.length * 10**18); for (uint256 i; i < ids.length; ) { uint256 id = ids[i]; require(holdings.remove(id)); IERC721(asset).transferFrom(address(this), msg.sender, id); unchecked { ++i; } } emit Withdraw(ids, msg.sender); } /// @inheritdoc IERC721Pool function withdrawWithSignature( uint256[] calldata ids, uint256 deadline, bytes memory signature ) external override { permitInternal(ids.length * 10**18, deadline, signature); withdraw(ids); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * 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 v4.8.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values in the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity >=0.8.4; /// @title IERC721Pool /// @author Hifi interface IERC721Pool { /// CUSTOM ERRORS /// error ERC721Pool__InsufficientIn(); error ERC721Pool__InvalidTo(); /// EVENTS /// /// @notice Emitted when NFTs are deposited and an equal amount of pool tokens are minted. /// @param ids The asset token IDs sent from the user's account to the pool. /// @param caller The caller of the function equal to msg.sender event Deposit(uint256[] ids, address caller); /// @notice Emitted when NFTs are withdrawn from the pool in exchange for an equal amount of pool tokens. /// @param ids The asset token IDs released from the pool. /// @param caller The caller of the function equal to msg.sender event Withdraw(uint256[] ids, address caller); /// CONSTANT FUNCTIONS /// /// @notice Returns the asset token ID held at index. /// @param index The index to check. function holdingAt(uint256 index) external view returns (uint256); /// @notice Returns the total number of asset token IDs held. function holdingsLength() external view returns (uint256); /// NON-CONSTANT FUNCTIONS /// /// @notice Deposit NFTs in exchange for an equivalent amount of pool tokens. /// /// @dev Emits a {Deposit} event. /// /// @dev Requirements: /// /// - The length of `ids` must be greater than zero. /// - The length of `ids` scaled to 18 decimals. /// - The address `to` must not be the zero address. /// /// @param ids The asset token IDs sent from the user's account to the pool. function deposit(uint256[] calldata ids) external; /// @notice Withdraw specified NFTs in exchange for an equivalent amount of pool tokens. /// /// @dev Emits a {Withdraw} event. /// /// @dev Requirements: /// /// - The length of `ids` must be greater than zero. /// - The length of `ids` scaled to 18 decimals. /// - The address `to` must not be the zero address. /// /// @param ids The asset token IDs to be released from the pool. function withdraw(uint256[] calldata ids) external; /// @notice Withdraw specified NFTs in exchange for an equivalent amount of pool tokens. /// /// @dev Emits a {Withdraw} event. /// /// @dev Requirements: /// - The `signature` must be a valid signed approval given by the caller to the ERC721Pool to spend pool tokens /// equal to the length of the ids array for the given `deadline` and the caller's current nonce. /// - The length of `ids` must be greater than zero. /// - The length of `ids` scaled to 18 decimals. /// - The address `to` must not be the zero address. /// /// @param ids The asset token IDs to be released from the pool. /// @param deadline The deadline beyond which the signature is not valid anymore. /// @param signature The packed signature for ERC721Pool. function withdrawWithSignature( uint256[] calldata ids, uint256 deadline, bytes memory signature ) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity >=0.8.4; import "./IERC20Wnft.sol"; /// @title ERC20Wnft /// @author Hifi contract ERC20Wnft is IERC20Wnft { /// PUBLIC STORAGE /// /// @inheritdoc IERC20 uint256 public override totalSupply; /// @inheritdoc IERC20 mapping(address => uint256) public override balanceOf; /// @inheritdoc IERC20 mapping(address => mapping(address => uint256)) public override allowance; /// @inheritdoc IERC20Metadata string public override name; /// @inheritdoc IERC20Metadata string public override symbol; /// @inheritdoc IERC20Metadata uint8 public constant override decimals = 18; /// @dev version string public constant version = "1"; /// @inheritdoc IERC20Permit bytes32 public override DOMAIN_SEPARATOR; // solhint-disable-previous-line var-name-mixedcase /// @inheritdoc IERC20Permit mapping(address => uint256) public override nonces; /// @dev keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; /// @inheritdoc IERC20Wnft address public override asset; /// @inheritdoc IERC20Wnft address public immutable override factory; /// CONSTRUCTOR /// constructor() { factory = msg.sender; } /// PUBLIC NON-CONSTANT FUNCTIONS /// /// @inheritdoc IERC20Wnft function initialize( string memory name_, string memory symbol_, address asset_ ) public override { if (msg.sender != factory) { revert ERC20Wnft__Forbidden(); } name = name_; symbol = symbol_; asset = asset_; uint256 chainId; assembly { // solhint-disable-previous-line no-inline-assembly chainId := chainid() } DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(name)), keccak256(bytes(version)), chainId, address(this) ) ); emit Initialize(name, symbol, asset); } /// @inheritdoc IERC20 function approve(address spender, uint256 value) external override returns (bool) { _approve(msg.sender, spender, value); return true; } /// @inheritdoc IERC20 function transfer(address to, uint256 value) external override returns (bool) { _transfer(msg.sender, to, value); return true; } /// @inheritdoc IERC20 function transferFrom( address from, address to, uint256 value ) external override returns (bool) { if (allowance[from][msg.sender] != type(uint256).max) { allowance[from][msg.sender] = allowance[from][msg.sender] - value; } _transfer(from, to, value); return true; } /// @inheritdoc IERC20Permit function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public override { if (deadline < block.timestamp) { revert ERC20Wnft__PermitExpired(); } bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline)) ) ); address recoveredAddress = ecrecover(digest, v, r, s); if (recoveredAddress == address(0) || recoveredAddress != owner) { revert ERC20Wnft__InvalidSignature(); } _approve(owner, spender, value); } /// INTERNAL NON-CONSTANT FUNCTIONS /// function _mint(address to, uint256 value) internal { totalSupply = totalSupply + value; balanceOf[to] = balanceOf[to] + value; emit Transfer(address(0), to, value); } function _burn(address from, uint256 value) internal { balanceOf[from] = balanceOf[from] - value; totalSupply = totalSupply - value; emit Transfer(from, address(0), value); } /// @dev See the documentation for the public functions that call this internal function. function permitInternal( uint256 amount, uint256 deadline, bytes memory signature ) internal { if (signature.length > 0) { bytes32 r; bytes32 s; uint8 v; // solhint-disable-next-line no-inline-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } permit(msg.sender, address(this), amount, deadline, v, r, s); } } function _approve( address owner, address spender, uint256 value ) private { allowance[owner][spender] = value; emit Approval(owner, spender, value); } function _transfer( address from, address to, uint256 value ) private { balanceOf[from] = balanceOf[from] - value; balanceOf[to] = balanceOf[to] + value; emit Transfer(from, to, value); } }
// 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: GPL-3.0-or-later pragma solidity >=0.8.4; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol"; /// @title IERC20Wnft /// @author Hifi interface IERC20Wnft is IERC20Permit, IERC20Metadata { /// CUSTOM ERRORS /// error ERC20Wnft__Forbidden(); error ERC20Wnft__InvalidSignature(); error ERC20Wnft__PermitExpired(); /// EVENTS /// /// @notice Emitted when the contract is initialized. /// @param name The ERC-20 name of the vault. /// @param symbol The ERC-20 symbol of the vault. /// @param asset The underlying ERC-721 asset contract address. event Initialize(string name, string symbol, address indexed asset); /// CONSTANT FUNCTIONS /// /// @notice Returns the address of the underlying ERC-721 asset. function asset() external view returns (address); /// @notice Returns the factory contract address. function factory() external view returns (address); /// NON-CONSTANT FUNCTIONS /// /// @notice Initializes the contract with the given values. /// /// @dev Emits an {Initialize} event. /// /// @dev Requirements: /// - Can only be called by the factory. /// /// @param name The ERC-20 name of the vault. /// @param symbol The ERC-20 symbol of the vault. /// @param asset The underlying ERC-721 asset contract address. function initialize( string memory name, string memory symbol, address asset ) 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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// 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); }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ERC20Wnft__Forbidden","type":"error"},{"inputs":[],"name":"ERC20Wnft__InvalidSignature","type":"error"},{"inputs":[],"name":"ERC20Wnft__PermitExpired","type":"error"},{"inputs":[],"name":"ERC721Pool__InsufficientIn","type":"error"},{"inputs":[],"name":"ERC721Pool__InvalidTo","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256[]","name":"ids","type":"uint256[]"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":false,"internalType":"string","name":"symbol","type":"string"},{"indexed":true,"internalType":"address","name":"asset","type":"address"}],"name":"Initialize","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256[]","name":"ids","type":"uint256[]"},{"indexed":false,"internalType":"address","name":"caller","type":"address"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"asset","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"holdingAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"holdingsLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"address","name":"asset_","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"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"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"ids","type":"uint256[]"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"withdrawWithSignature","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.