Contract Name:
SeaportV15Module
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to
* 0 before setting it to a non-zero value.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
* Revert on invalid signature.
*/
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return
success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: 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;
interface ISeaport {
enum OrderType {
FULL_OPEN,
PARTIAL_OPEN,
FULL_RESTRICTED,
PARTIAL_RESTRICTED
}
enum ItemType {
NATIVE,
ERC20,
ERC721,
ERC1155,
ERC721_WITH_CRITERIA,
ERC1155_WITH_CRITERIA
}
enum Side {
OFFER,
CONSIDERATION
}
struct OfferItem {
ItemType itemType;
address token;
uint256 identifierOrCriteria;
uint256 startAmount;
uint256 endAmount;
}
struct ConsiderationItem {
ItemType itemType;
address token;
uint256 identifierOrCriteria;
uint256 startAmount;
uint256 endAmount;
address recipient;
}
struct SpentItem {
ItemType itemType;
address token;
uint256 identifier;
uint256 amount;
}
struct ReceivedItem {
ItemType itemType;
address token;
uint256 identifier;
uint256 amount;
address recipient;
}
struct OrderComponents {
address offerer;
address zone;
OfferItem[] offer;
ConsiderationItem[] consideration;
OrderType orderType;
uint256 startTime;
uint256 endTime;
bytes32 zoneHash;
uint256 salt;
bytes32 conduitKey;
uint256 counter;
}
struct OrderParameters {
address offerer;
address zone;
OfferItem[] offer;
ConsiderationItem[] consideration;
OrderType orderType;
uint256 startTime;
uint256 endTime;
bytes32 zoneHash;
uint256 salt;
bytes32 conduitKey;
uint256 totalOriginalConsiderationItems;
}
struct Order {
OrderParameters parameters;
bytes signature;
}
struct AdvancedOrder {
OrderParameters parameters;
uint120 numerator;
uint120 denominator;
bytes signature;
bytes extraData;
}
struct CriteriaResolver {
uint256 orderIndex;
Side side;
uint256 index;
uint256 identifier;
bytes32[] criteriaProof;
}
struct FulfillmentComponent {
uint256 orderIndex;
uint256 itemIndex;
}
struct Fulfillment {
FulfillmentComponent[] offerComponents;
FulfillmentComponent[] considerationComponents;
}
struct Execution {
ReceivedItem item;
address offerer;
bytes32 conduitKey;
}
struct ZoneParameters {
bytes32 orderHash;
address fulfiller;
address offerer;
SpentItem[] offer;
ReceivedItem[] consideration;
bytes extraData;
bytes32[] orderHashes;
uint256 startTime;
uint256 endTime;
bytes32 zoneHash;
}
struct Schema {
uint256 id;
bytes metadata;
}
function getOrderHash(OrderComponents calldata order) external view returns (bytes32 orderHash);
function getOrderStatus(bytes32 orderHash)
external
view
returns (
bool isValidated,
bool isCancelled,
uint256 totalFilled,
uint256 totalSize
);
function getCounter(address offerer) external view returns (uint256 counter);
function fulfillAdvancedOrder(
AdvancedOrder calldata advancedOrder,
CriteriaResolver[] calldata criteriaResolvers,
bytes32 fulfillerConduitKey,
address recipient
) external payable returns (bool fulfilled);
function fulfillAvailableAdvancedOrders(
AdvancedOrder[] memory advancedOrders,
CriteriaResolver[] calldata criteriaResolvers,
FulfillmentComponent[][] calldata offerFulfillments,
FulfillmentComponent[][] calldata considerationFulfillments,
bytes32 fulfillerConduitKey,
address recipient,
uint256 maximumFulfilled
) external payable returns (bool[] memory availableOrders, Execution[] memory executions);
function matchOrders(Order[] calldata orders, Fulfillment[] calldata fulfillments)
external
payable
returns (Execution[] memory executions);
function matchAdvancedOrders(
AdvancedOrder[] calldata advancedOrders,
CriteriaResolver[] calldata criteriaResolvers,
Fulfillment[] calldata fulfillments
) external payable returns (Execution[] memory executions);
}
// 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);
}
}
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);
}
}
}
// 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 {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import {BaseExchangeModule} from "./BaseExchangeModule.sol";
import {BaseModule} from "../BaseModule.sol";
import {ISeaport} from "../../../interfaces/ISeaport.sol";
// Notes on the Seaport module:
// - supports filling listings (both ERC721/ERC1155)
// - supports filling offers (both ERC721/ERC1155)
contract SeaportV15Module is BaseExchangeModule {
// --- Structs ---
struct SeaportETHListingWithPrice {
ISeaport.AdvancedOrder order;
uint256 price;
}
// --- Fields ---
ISeaport public immutable EXCHANGE;
// --- Constructor ---
constructor(
address owner,
address router,
address exchange
) BaseModule(owner) BaseExchangeModule(router) {
EXCHANGE = ISeaport(exchange);
}
// --- Fallback ---
receive() external payable {}
// --- Single ETH listing ---
function acceptETHListing(
ISeaport.AdvancedOrder calldata order,
ETHListingParams calldata params,
Fee[] calldata fees
)
external
payable
nonReentrant
refundETHLeftover(params.refundTo)
chargeETHFees(fees, params.amount)
{
// Execute the fill
params.revertIfIncomplete
? _fillSingleOrderWithRevertIfIncomplete(
order,
new ISeaport.CriteriaResolver[](0),
params.fillTo,
params.amount
)
: _fillSingleOrder(order, new ISeaport.CriteriaResolver[](0), params.fillTo, params.amount);
}
// --- Single ERC20 listing ---
function acceptERC20Listing(
ISeaport.AdvancedOrder calldata order,
ERC20ListingParams calldata params,
Fee[] calldata fees
)
external
nonReentrant
refundERC20Leftover(params.refundTo, params.token)
chargeERC20Fees(fees, params.token, params.amount)
{
// Approve the exchange if needed
_approveERC20IfNeeded(params.token, address(EXCHANGE), params.amount);
// Execute the fill
params.revertIfIncomplete
? _fillSingleOrderWithRevertIfIncomplete(
order,
new ISeaport.CriteriaResolver[](0),
params.fillTo,
0
)
: _fillSingleOrder(order, new ISeaport.CriteriaResolver[](0), params.fillTo, 0);
}
// --- Multiple ETH listings ---
function acceptETHListings(
SeaportETHListingWithPrice[] calldata orders,
ETHListingParams calldata params,
Fee[] calldata fees
)
external
payable
nonReentrant
refundETHLeftover(params.refundTo)
chargeETHFees(fees, params.amount)
{
uint256 length = orders.length;
ISeaport.CriteriaResolver[] memory criteriaResolvers = new ISeaport.CriteriaResolver[](0);
// Execute the fills
if (params.revertIfIncomplete) {
for (uint256 i; i < length; ) {
_fillSingleOrderWithRevertIfIncomplete(
orders[i].order,
criteriaResolvers,
params.fillTo,
orders[i].price
);
unchecked {
++i;
}
}
} else {
for (uint256 i; i < length; ) {
_fillSingleOrder(orders[i].order, criteriaResolvers, params.fillTo, orders[i].price);
unchecked {
++i;
}
}
}
}
// --- Multiple ERC20 listings ---
function acceptERC20Listings(
ISeaport.AdvancedOrder[] calldata orders,
ERC20ListingParams calldata params,
Fee[] calldata fees
)
external
nonReentrant
refundERC20Leftover(params.refundTo, params.token)
chargeERC20Fees(fees, params.token, params.amount)
{
// Approve the exchange if needed
_approveERC20IfNeeded(params.token, address(EXCHANGE), params.amount);
uint256 length = orders.length;
ISeaport.CriteriaResolver[] memory criteriaResolvers = new ISeaport.CriteriaResolver[](0);
// Execute the fills
if (params.revertIfIncomplete) {
for (uint256 i; i < length; ) {
_fillSingleOrderWithRevertIfIncomplete(orders[i], criteriaResolvers, params.fillTo, 0);
unchecked {
++i;
}
}
} else {
for (uint256 i; i < length; ) {
_fillSingleOrder(orders[i], criteriaResolvers, params.fillTo, 0);
unchecked {
++i;
}
}
}
}
// --- Single ERC721 offer ---
function acceptERC721Offer(
ISeaport.AdvancedOrder calldata order,
// Use `memory` instead of `calldata` to avoid `Stack too deep` errors
ISeaport.CriteriaResolver[] memory criteriaResolvers,
OfferParams calldata params,
Fee[] calldata fees
) external nonReentrant {
// Extract the ERC721 token from the consideration items
ISeaport.ConsiderationItem calldata nftItem = order.parameters.consideration[0];
if (
nftItem.itemType != ISeaport.ItemType.ERC721 &&
nftItem.itemType != ISeaport.ItemType.ERC721_WITH_CRITERIA
) {
revert WrongParams();
}
IERC721 nftToken = IERC721(nftItem.token);
// Extract the payment token from the offer items
ISeaport.OfferItem calldata paymentItem = order.parameters.offer[0];
IERC20 paymentToken = IERC20(paymentItem.token);
// Approve the exchange if needed
_approveERC721IfNeeded(nftToken, address(EXCHANGE));
_approveERC20IfNeeded(paymentToken, address(EXCHANGE), type(uint256).max);
// Execute the fill
params.revertIfIncomplete
? _fillSingleOrderWithRevertIfIncomplete(order, criteriaResolvers, address(this), 0)
: _fillSingleOrder(order, criteriaResolvers, address(this), 0);
uint256 identifier = nftItem.itemType == ISeaport.ItemType.ERC721
? nftItem.identifierOrCriteria
: criteriaResolvers[0].identifier;
// Pay fees
if (nftToken.ownerOf(identifier) != address(this)) {
// Only pay fees if the fill was successful
uint256 feesLength = fees.length;
for (uint256 i; i < feesLength; ) {
Fee memory fee = fees[i];
_sendERC20(fee.recipient, fee.amount, paymentToken);
unchecked {
++i;
}
}
}
// Refund any ERC721 leftover
_sendAllERC721(params.refundTo, nftToken, identifier);
// Forward any left payment to the specified receiver
_sendAllERC20(params.fillTo, paymentToken);
}
// --- Single ERC1155 offer ---
function acceptERC1155Offer(
ISeaport.AdvancedOrder calldata order,
// Use `memory` instead of `calldata` to avoid `Stack too deep` errors
ISeaport.CriteriaResolver[] memory criteriaResolvers,
OfferParams calldata params,
Fee[] calldata fees
) external nonReentrant {
// Extract the ERC1155 token from the consideration items
ISeaport.ConsiderationItem calldata nftItem = order.parameters.consideration[0];
if (
nftItem.itemType != ISeaport.ItemType.ERC1155 &&
nftItem.itemType != ISeaport.ItemType.ERC1155_WITH_CRITERIA
) {
revert WrongParams();
}
IERC1155 nftToken = IERC1155(nftItem.token);
// Extract the payment token from the offer items
ISeaport.OfferItem calldata paymentItem = order.parameters.offer[0];
IERC20 paymentToken = IERC20(paymentItem.token);
// Approve the exchange if needed
_approveERC1155IfNeeded(nftToken, address(EXCHANGE));
_approveERC20IfNeeded(paymentToken, address(EXCHANGE), type(uint256).max);
uint256 identifier = nftItem.itemType == ISeaport.ItemType.ERC1155
? nftItem.identifierOrCriteria
: criteriaResolvers[0].identifier;
uint256 balanceBefore = nftToken.balanceOf(address(this), identifier);
// Execute the fill
params.revertIfIncomplete
? _fillSingleOrderWithRevertIfIncomplete(order, criteriaResolvers, address(this), 0)
: _fillSingleOrder(order, criteriaResolvers, address(this), 0);
uint256 balanceAfter = nftToken.balanceOf(address(this), identifier);
// Pay fees
uint256 amountFilled = balanceBefore - balanceAfter;
if (amountFilled > 0) {
uint256 feesLength = fees.length;
for (uint256 i; i < feesLength; ) {
Fee memory fee = fees[i];
_sendERC20(
fee.recipient,
// Only pay fees for the amount that was actually filled
(fee.amount * amountFilled) / order.numerator,
paymentToken
);
unchecked {
++i;
}
}
}
// Refund any ERC1155 leftover
_sendAllERC1155(params.refundTo, nftToken, identifier);
// Forward any left payment to the specified receiver
_sendAllERC20(params.fillTo, paymentToken);
}
// --- Generic handler (used for Seaport-based approvals) ---
function matchOrders(
ISeaport.Order[] calldata orders,
ISeaport.Fulfillment[] calldata fulfillments
) external nonReentrant {
// We don't perform any kind of input or return value validation,
// so this function should be used with precaution - the official
// way to use it is only for Seaport-based approvals
EXCHANGE.matchOrders(orders, fulfillments);
}
// --- 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 ---
// NOTE: In lots of cases, Seaport will not revert if fills were not
// fully executed. An example of that is partial filling, which will
// successfully fill any amount that is still available (including a
// zero amount). One way to ensure that we revert in case of partial
// executions is to check the order's filled amount before and after
// we trigger the fill (we can use Seaport's `getOrderStatus` method
// to check). Since this can be expensive in terms of gas, we have a
// separate method variant to be called when reverts are enabled.
function _fillSingleOrder(
ISeaport.AdvancedOrder calldata order,
// Use `memory` instead of `calldata` to avoid `Stack too deep` errors
ISeaport.CriteriaResolver[] memory criteriaResolvers,
address receiver,
uint256 value
) internal {
// Execute the fill
try
EXCHANGE.fulfillAdvancedOrder{value: value}(order, criteriaResolvers, bytes32(0), receiver)
{} catch {}
}
function _fillSingleOrderWithRevertIfIncomplete(
ISeaport.AdvancedOrder calldata order,
// Use `memory` instead of `calldata` to avoid `Stack too deep` errors
ISeaport.CriteriaResolver[] memory criteriaResolvers,
address receiver,
uint256 value
) internal {
// Cache the order's hash
bytes32 orderHash = _getOrderHash(order.parameters);
// Before filling, get the order's filled amount
uint256 beforeFilledAmount = _getFilledAmount(orderHash, order.denominator);
// Execute the fill
bool success;
try
EXCHANGE.fulfillAdvancedOrder{value: value}(order, criteriaResolvers, bytes32(0), receiver)
returns (bool fulfilled) {
success = fulfilled;
} catch {
revert UnsuccessfulFill();
}
if (!success) {
revert UnsuccessfulFill();
} else {
// After successfully filling, get the order's filled amount
uint256 afterFilledAmount = _getFilledAmount(orderHash, order.denominator);
// Make sure the amount filled as part of this call is correct
if (afterFilledAmount - beforeFilledAmount != order.numerator) {
revert UnsuccessfulFill();
}
}
}
function _getOrderHash(
// Must use `memory` instead of `calldata` for the below cast
ISeaport.OrderParameters memory orderParameters
) internal view returns (bytes32 orderHash) {
// `OrderParameters` and `OrderComponents` share the exact same
// fields, apart from the last one, so here we simply treat the
// `orderParameters` argument as `OrderComponents` and then set
// the last field to the correct data
ISeaport.OrderComponents memory orderComponents;
assembly {
orderComponents := orderParameters
}
orderComponents.counter = EXCHANGE.getCounter(orderParameters.offerer);
orderHash = EXCHANGE.getOrderHash(orderComponents);
}
function _getFilledAmount(
bytes32 orderHash,
uint256 adjustedTotalSize
) internal view returns (uint256 adjustedTotalFilled) {
(, , uint256 totalFilled, uint256 totalSize) = EXCHANGE.getOrderStatus(orderHash);
adjustedTotalFilled = totalSize > 0 ? (totalFilled * adjustedTotalSize) / totalSize : 0;
}
}