Description:
Multi-signature wallet contract requiring multiple confirmations for transaction execution.
Blockchain: Ethereum
Source Code: View Code On The Blockchain
Solidity Source Code:
{{
"language": "Solidity",
"sources": {
"@openzeppelin/contracts/access/Ownable.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {Context} from "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* The initial owner is set to the address provided by the deployer. This can
* later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
constructor(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
"
},
"@openzeppelin/contracts/interfaces/draft-IERC6093.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/draft-IERC6093.sol)
pragma solidity >=0.8.4;
/**
* @dev Standard ERC-20 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
*/
interface IERC20Errors {
/**
* @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param balance Current balance for the interacting account.
* @param needed Minimum amount required to perform a transfer.
*/
error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC20InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC20InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
* @param spender Address that may be allowed to operate on tokens without being their owner.
* @param allowance Amount of tokens a `spender` is allowed to operate with.
* @param needed Minimum amount required to perform a transfer.
*/
error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC20InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `spender` to be approved. Used in approvals.
* @param spender Address that may be allowed to operate on tokens without being their owner.
*/
error ERC20InvalidSpender(address spender);
}
/**
* @dev Standard ERC-721 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
*/
interface IERC721Errors {
/**
* @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
* Used in balance queries.
* @param owner Address of the current owner of a token.
*/
error ERC721InvalidOwner(address owner);
/**
* @dev Indicates a `tokenId` whose `owner` is the zero address.
* @param tokenId Identifier number of a token.
*/
error ERC721NonexistentToken(uint256 tokenId);
/**
* @dev Indicates an error related to the ownership over a particular token. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param tokenId Identifier number of a token.
* @param owner Address of the current owner of a token.
*/
error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC721InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC721InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `operator`’s approval. Used in transfers.
* @param operator Address that may be allowed to operate on tokens without being their owner.
* @param tokenId Identifier number of a token.
*/
error ERC721InsufficientApproval(address operator, uint256 tokenId);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC721InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `operator` to be approved. Used in approvals.
* @param operator Address that may be allowed to operate on tokens without being their owner.
*/
error ERC721InvalidOperator(address operator);
}
/**
* @dev Standard ERC-1155 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
*/
interface IERC1155Errors {
/**
* @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param balance Current balance for the interacting account.
* @param needed Minimum amount required to perform a transfer.
* @param tokenId Identifier number of a token.
*/
error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC1155InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC1155InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `operator`’s approval. Used in transfers.
* @param operator Address that may be allowed to operate on tokens without being their owner.
* @param owner Address of the current owner of a token.
*/
error ERC1155MissingApprovalForAll(address operator, address owner);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC1155InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `operator` to be approved. Used in approvals.
* @param operator Address that may be allowed to operate on tokens without being their owner.
*/
error ERC1155InvalidOperator(address operator);
/**
* @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
* Used in batch transfers.
* @param idsLength Length of the array of token identifiers
* @param valuesLength Length of the array of token amounts
*/
error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}
"
},
"@openzeppelin/contracts/token/ERC20/ERC20.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.20;
import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC-20
* applications.
*/
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
mapping(address account => uint256) private _balances;
mapping(address account => mapping(address spender => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* Both values are immutable: they can only be set once during construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the default value returned by this function, unless
* it's overridden.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return 18;
}
/// @inheritdoc IERC20
function totalSupply() public view virtual returns (uint256) {
return _totalSupply;
}
/// @inheritdoc IERC20
function balanceOf(address account) public view virtual returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `value`.
*/
function transfer(address to, uint256 value) public virtual returns (bool) {
address owner = _msgSender();
_transfer(owner, to, value);
return true;
}
/// @inheritdoc IERC20
function allowance(address owner, address spender) public view virtual returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 value) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, value);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Skips emitting an {Approval} event indicating an allowance update. This is not
* required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `value`.
* - the caller must have allowance for ``from``'s tokens of at least
* `value`.
*/
function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, value);
_transfer(from, to, value);
return true;
}
/**
* @dev Moves a `value` amount of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* NOTE: This function is not virtual, {_update} should be overridden instead.
*/
function _transfer(address from, address to, uint256 value) internal {
if (from == address(0)) {
revert ERC20InvalidSender(address(0));
}
if (to == address(0)) {
revert ERC20InvalidReceiver(address(0));
}
_update(from, to, value);
}
/**
* @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
* (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
* this function.
*
* Emits a {Transfer} event.
*/
function _update(address from, address to, uint256 value) internal virtual {
if (from == address(0)) {
// Overflow check required: The rest of the code assumes that totalSupply never overflows
_totalSupply += value;
} else {
uint256 fromBalance = _balances[from];
if (fromBalance < value) {
revert ERC20InsufficientBalance(from, fromBalance, value);
}
unchecked {
// Overflow not possible: value <= fromBalance <= totalSupply.
_balances[from] = fromBalance - value;
}
}
if (to == address(0)) {
unchecked {
// Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
_totalSupply -= value;
}
} else {
unchecked {
// Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
_balances[to] += value;
}
}
emit Transfer(from, to, value);
}
/**
* @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
* Relies on the `_update` mechanism
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* NOTE: This function is not virtual, {_update} should be overridden instead.
*/
function _mint(address account, uint256 value) internal {
if (account == address(0)) {
revert ERC20InvalidReceiver(address(0));
}
_update(address(0), account, value);
}
/**
* @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
* Relies on the `_update` mechanism.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* NOTE: This function is not virtual, {_update} should be overridden instead
*/
function _burn(address account, uint256 value) internal {
if (account == address(0)) {
revert ERC20InvalidSender(address(0));
}
_update(account, address(0), value);
}
/**
* @dev Sets `value` as the allowance of `spender` over the `owner`'s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*
* Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
*/
function _approve(address owner, address spender, uint256 value) internal {
_approve(owner, spender, value, true);
}
/**
* @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
*
* By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
* `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
* `Approval` event during `transferFrom` operations.
*
* Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
* true using the following override:
*
* ```solidity
* function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
* super._approve(owner, spender, value, true);
* }
* ```
*
* Requirements are the same as {_approve}.
*/
function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
if (owner == address(0)) {
revert ERC20InvalidApprover(address(0));
}
if (spender == address(0)) {
revert ERC20InvalidSpender(address(0));
}
_allowances[owner][spender] = value;
if (emitEvent) {
emit Approval(owner, spender, value);
}
}
/**
* @dev Updates `owner`'s allowance for `spender` based on spent `value`.
*
* Does not update the allowance value in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Does not emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance < type(uint256).max) {
if (currentAllowance < value) {
revert ERC20InsufficientAllowance(spender, currentAllowance, value);
}
unchecked {
_approve(owner, spender, currentAllowance - value, false);
}
}
}
}
"
},
"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity >=0.6.2;
import {IERC20} from "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC-20 standard.
*/
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);
}
"
},
"@openzeppelin/contracts/token/ERC20/IERC20.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)
pragma solidity >=0.4.16;
/**
* @dev Interface of the ERC-20 standard as defined in the ERC.
*/
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 value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` 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 value) external returns (bool);
}
"
},
"@openzeppelin/contracts/token/ERC721/IERC721.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/IERC721.sol)
pragma solidity >=0.6.2;
import {IERC165} from "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC-721 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 ERC-721 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 ERC-721
* 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 address zero.
*
* 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);
}
"
},
"@openzeppelin/contracts/utils/Context.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
"
},
"@openzeppelin/contracts/utils/introspection/IERC165.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)
pragma solidity >=0.4.16;
/**
* @dev Interface of the ERC-165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[ERC].
*
* 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[ERC 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);
}
"
},
"@openzeppelin/contracts/utils/Pausable.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/Pausable.sol)
pragma solidity ^0.8.20;
import {Context} from "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
bool private _paused;
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
/**
* @dev The operation failed because the contract is paused.
*/
error EnforcedPause();
/**
* @dev The operation failed because the contract is not paused.
*/
error ExpectedPause();
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
_requireNotPaused();
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
_requirePaused();
_;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Throws if the contract is paused.
*/
function _requireNotPaused() internal view virtual {
if (paused()) {
revert EnforcedPause();
}
}
/**
* @dev Throws if the contract is not paused.
*/
function _requirePaused() internal view virtual {
if (!paused()) {
revert ExpectedPause();
}
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
"
},
"@openzeppelin/contracts/utils/ReentrancyGuard.sol": {
"content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)
pragma solidity ^0.8.20;
/**
* @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 EIP-1153 (transient storage) is available on the chain you're deploying at,
* consider using {ReentrancyGuardTransient} instead.
*
* 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;
/**
* @dev Unauthorized reentrant call.
*/
error ReentrancyGuardReentrantCall();
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
if (_status == ENTERED) {
revert ReentrancyGuardReentrantCall();
}
// 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;
}
}
"
},
"contracts/Cookie.sol": {
"content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract Cookie is ERC20 {
mapping(address => bool) public hasMinted;
mapping(uint256 => uint256) public recipeTotalCooked;
mapping(address => mapping(uint256 => uint256)) public userCookedForRecipe;
uint256 public constant MINT_AMOUNT = 1_000_000_000 * 10**18; // 1 billion tokens
event Minted(address indexed user, uint256 amount);
event Cooked(address indexed user, uint256 indexed recipeId, uint256 amount);
constructor() ERC20("Cookie", "COOKIE") {}
function mint() external {
require(!hasMinted[msg.sender], "Address has already minted");
hasMinted[msg.sender] = true;
_mint(msg.sender, MINT_AMOUNT);
emit Minted(msg.sender, MINT_AMOUNT);
}
function cook(uint256 recipeId, uint256 amount) external {
require(amount > 0, "Amount must be greater than zero");
require(balanceOf(msg.sender) >= amount, "Insufficient balance");
// Burn the tokens (they can never be recovered)
_burn(msg.sender, amount);
// Track the cooking activity
recipeTotalCooked[recipeId] += amount;
userCookedForRecipe[msg.sender][recipeId] += amount;
emit Cooked(msg.sender, recipeId, amount);
}
function getRecipeTotalCooked(uint256 recipeId) external view returns (uint256) {
return recipeTotalCooked[recipeId];
}
function getUserCookedForRecipe(address user, uint256 recipeId) external view returns (uint256) {
return userCookedForRecipe[user][recipeId];
}
}"
},
"contracts/FixedNFTArbitrage.sol": {
"content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Pausable.sol";
/// @title Fixed NFT Arbitrage Contract
/// @notice Properly designed to receive ETH from buyTargetNFT, buy NFTs, forward them back, and keep profits
/// @dev Fixes all critical issues identified in code review
contract FixedNFTArbitrage is ReentrancyGuard, Ownable, Pausable {
// Marketplace contract addresses
address public constant SEAPORT_1_6 = 0x0000000000000068F116a894984e2DB1123eB395;
address public constant BLUR_EXCHANGE = 0x000000000000Ad05Ccc4F10045630fb830B95127;
// Security limits
uint256 public maxSlippageBps = 500; // 5% max slippage from expected price
uint256 public minProfitThreshold = 0.02 ether; // 0.02 ETH minimum profit
// Events with proper economic tracking
event NFTArbitrageExecuted(
uint256 indexed tokenId,
address indexed collection,
address indexed marketplace,
uint256 ethReceived, // ETH we received from buyTargetNFT
uint256 ethSpent, // ETH we spent on marketplace
uint256 profit, // Real profit = received - spent
address caller,
uint256 timestamp
);
event ProfitWithdrawn(address indexed to, uint256 amount, uint256 timestamp);
event ArbitrageFailed(
uint256 indexed tokenId,
address indexed collection,
uint256 ethReceived,
uint256 actualCost,
string reason
);
// Errors
error InsufficientPayment();
error NFTNotReceived();
error ExternalCallFailed(bytes reason);
error NoProfit();
error WithdrawFailed();
error InvalidCollection();
error UnauthorizedCaller();
error ExcessiveSlippage();
error InsufficientProfit();
error TransactionExpired();
error MarketplaceNotApproved();
error InvalidTokenId();
error ExcessiveCost();
error ZeroPayment();
error WrongNFTReceived();
// State variables
mapping(address => bool) public authorizedCallers;
mapping(address => bool) public approvedMarketplaces;
uint256 public totalProfitEarned; // Real profits earned
uint256 public totalETHProcessed; // Total ETH received from buyTargetNFT
uint256 public transactionCount;
modifier onlyAuthorized() {
if (!authorizedCallers[msg.sender] && msg.sender != owner()) {
revert UnauthorizedCaller();
}
_;
}
modifier notExpired(uint256 deadline) {
if (block.timestamp > deadline) revert TransactionExpired();
_;
}
modifier validInputs(uint256 expectedId, address collection) {
if (collection == address(0)) revert InvalidCollection();
if (expectedId == 0) revert InvalidTokenId();
_;
}
modifier onlyApprovedMarketplace(address marketplace) {
if (!approvedMarketplaces[marketplace]) revert MarketplaceNotApproved();
_;
}
constructor() Ownable(msg.sender) {
authorizedCallers[msg.sender] = true;
// Pre-approve known marketplaces
approvedMarketplaces[SEAPORT_1_6] = true;
approvedMarketplaces[BLUR_EXCHANGE] = true;
}
/// @notice Authorize an address to call arbitrage functions
function authorizeCaller(address caller) external onlyOwner {
authorizedCallers[caller] = true;
}
/// @notice Remove authorization from an address
function revokeCaller(address caller) external onlyOwner {
authorizedCallers[caller] = false;
}
/// @notice Add approved marketplace
function approveMarketplace(address marketplace) external onlyOwner {
approvedMarketplaces[marketplace] = true;
}
/// @notice Remove approved marketplace
function revokeMarketplace(address marketplace) external onlyOwner {
approvedMarketplaces[marketplace] = false;
}
/// @notice Update security limits
function updateLimits(
uint256 _minProfitThreshold,
uint256 _maxSlippageBps
) external onlyOwner {
minProfitThreshold = _minProfitThreshold;
maxSlippageBps = _maxSlippageBps;
}
/// @notice Emergency pause function
function pause() external onlyOwner {
_pause();
}
/// @notice Unpause function
function unpause() external onlyOwner {
_unpause();
}
/// @notice Purchase NFT from OpenSea/Seaport - RECEIVES ETH FROM buyTargetNFT
/// @param data Encoded calldata for the Seaport fulfillment
/// @param expectedId Expected NFT token ID to receive
/// @param collection NFT collection contract address
/// @param maxAcceptableCost Maximum ETH we're willing to spend (slippage protection)
/// @param deadline Transaction deadline
function buyFromSeaport(
bytes calldata data,
uint256 expectedId,
address collection,
uint256 maxAcceptableCost,
uint256 deadline
) external payable
onlyAuthorized
nonReentrant
whenNotPaused
notExpired(deadline)
validInputs(expectedId, collection)
onlyApprovedMarketplace(SEAPORT_1_6)
{
_executePurchase(SEAPORT_1_6, data, expectedId, collection, maxAcceptableCost);
}
/// @notice Purchase NFT from Blur - RECEIVES ETH FROM buyTargetNFT
/// @param data Encoded calldata for the Blur execution
/// @param expectedId Expected NFT token ID to receive
/// @param collection NFT collection contract address
/// @param maxAcceptableCost Maximum ETH we're willing to spend (slippage protection)
/// @param deadline Transaction deadline
function buyFromBlur(
bytes calldata data,
uint256 expectedId,
address collection,
uint256 maxAcceptableCost,
uint256 deadline
) external payable
onlyAuthorized
nonReentrant
whenNotPaused
notExpired(deadline)
validInputs(expectedId, collection)
onlyApprovedMarketplace(BLUR_EXCHANGE)
{
_executePurchase(BLUR_EXCHANGE, data, expectedId, collection, maxAcceptableCost);
}
/// @notice Purchase NFT from approved marketplace - RECEIVES ETH FROM buyTargetNFT
/// @param marketplace Address of the marketplace contract
/// @param data Encoded calldata for the marketplace
/// @param expectedId Expected NFT token ID to receive
/// @param collection NFT collection contract address
/// @param maxAcceptableCost Maximum ETH we're willing to spend (slippage protection)
/// @param deadline Transaction deadline
function buyFromMarketplace(
address marketplace,
bytes calldata data,
uint256 expectedId,
address collection,
uint256 maxAcceptableCost,
uint256 deadline
) external payable
onlyAuthorized
nonReentrant
whenNotPaused
notExpired(deadline)
validInputs(expectedId, collection)
onlyApprovedMarketplace(marketplace)
{
_executePurchase(marketplace, data, expectedId, collection, maxAcceptableCost);
}
/// @notice Internal function to execute purchase with proper economics
/// @dev Now uses real ETH received from buyTargetNFT (msg.value)
function _executePurchase(
address marketplace,
bytes calldata data,
uint256 expectedId,
address collection,
uint256 maxAcceptableCost
) internal {
// Validate payment
if (msg.value == 0) revert ZeroPayment();
// Track what we received from buyTargetNFT
uint256 ethReceived = msg.value;
totalETHProcessed += ethReceived;
// Pre-execution state
uint256 ethBefore = address(this).balance - ethReceived; // Don't count the ETH we just received
uint256 nftCountBefore = IERC721(collection).balanceOf(address(this));
// Ensure we don't already own this NFT
try IERC721(collection).ownerOf(expectedId) returns (address currentOwner) {
if (currentOwner == address(this)) {
revert NFTNotReceived();
}
} catch {
// Token doesn't exist or other error, continue
}
// Execute the marketplace call with the ETH we received
(bool success, bytes memory returnData) = marketplace.call{value: ethReceived}(data);
if (!success) {
revert ExternalCallFailed(returnData);
}
// Post-execution validation
uint256 nftCountAfter = IERC721(collection).balanceOf(address(this));
if (nftCountAfter != nftCountBefore + 1) {
revert NFTNotReceived();
}
// Verify we own the expected token ID
if (IERC721(collection).ownerOf(expectedId) != address(this)) {
revert WrongNFTReceived();
}
// Calculate actual cost - this is the REAL amount spent
uint256 currentBalance = address(this).balance;
uint256 actualCost = ethBefore + ethReceived - currentBalance;
// Slippage protection - don't let marketplace spend more than expected
if (actualCost > maxAcceptableCost) {
revert ExcessiveCost();
}
// Calculate real profit
if (actualCost > ethReceived) {
// We somehow spent more than we received - this should be impossible
// but if it happens, it's a critical error
emit ArbitrageFailed(expectedId, collection, ethReceived, actualCost, "Cost exceeds payment");
revert InsufficientPayment();
}
uint256 profit = ethReceived - actualCost;
// Ensure minimum profit threshold
if (profit < minProfitThreshold) {
emit ArbitrageFailed(expectedId, collection, ethReceived, actualCost, "Insufficient profit");
revert InsufficientProfit();
}
// Track real profits
totalProfitEarned += profit;
transactionCount++;
// Transfer NFT back to caller (buyTargetNFT contract)
IERC721(collection).transferFrom(address(this), msg.sender, expectedId);
// Emit success event with real economics
emit NFTArbitrageExecuted(
expectedId,
collection,
marketplace,
ethReceived,
actualCost,
profit,
msg.sender,
block.timestamp
);
}
/// @notice Withdraw accumulated profits
/// @param to Address to send profits to
/// @param amount Amount to withdraw (0 for all)
function withdrawProfit(address payable to, uint256 amount) external onlyOwner nonReentrant {
if (to == address(0)) revert InvalidCollection();
uint256 withdrawAmount = amount == 0 ? address(this).balance : amount;
if (withdrawAmount == 0) revert NoProfit();
(bool success,) = to.call{value: withdrawAmount}("");
if (!success) revert WithdrawFailed();
emit ProfitWithdrawn(to, withdrawAmount, block.timestamp);
}
/// @notice Emergency withdrawal function
function emergencyWithdraw(address payable to) external onlyOwner {
if (to == address(0)) revert InvalidCollection();
uint256 balance = address(this).balance;
(bool success,) = to.call{value: balance}("");
if (!success) revert WithdrawFailed();
emit ProfitWithdrawn(to, balance, block.timestamp);
}
/// @notice Transfer NFT out of contract (emergency)
function transferNFT(address collection, uint256 tokenId, address to) external onlyOwner {
if (to == address(0)) revert InvalidCollection();
IERC721(collection).transferFrom(address(this), to, tokenId);
}
/// @notice Get contract statistics with real economics
function getStats() external view returns (
uint256 balance,
uint256 _totalProfitEarned,
uint256 _totalETHProcessed,
uint256 _transactionCount,
uint256 averageProfitPerTx
) {
return (
address(this).balance,
totalProfitEarned,
totalETHProcessed,
transactionCount,
transactionCount > 0 ? totalProfitEarned / transactionCount : 0
);
}
/// @notice Handle NFT transfers
function onERC721Received(
address,
address,
uint256,
bytes calldata
) external pure returns (bytes4) {
return this.onERC721Received.selector;
}
/// @notice Allow contract to receive ETH
receive() external payable {}
/// @notice Fallback function
fallback() external payable {}
/// @notice Get contract balance
function getBalance() external view returns (uint256) {
return address(this).balance;
}
}"
},
"contracts/Lock.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.28;
contract Lock {
uint public unlockTime;
address payable public owner;
event Withdrawal(uint amount, uint when);
constructor(uint _unlockTime) payable {
require(
block.timestamp < _unlockTime,
"Unlock time should be in the future"
);
unlockTime = _unlockTime;
owner = payable(msg.sender);
}
function withdraw() public {
require(block.timestamp >= unlockTime, "You can't withdraw yet");
require(msg.sender == owner, "You aren't the owner");
emit Withdrawal(address(this).balance, block.timestamp);
owner.transfer(address(this).balance);
}
}"
},
"contracts/NFTArbitrage.sol": {
"content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
interface ISeaport {
struct OrderParameters {
address offerer;
address zone;
OfferItem[] offer;
ConsiderationItem[] consideration;
uint8 orderType;
uint256 startTime;
uint256 endTime;
bytes32 zoneHash;
uint256 salt;
bytes32 conduitKey;
uint256 totalOriginalConsiderationItems;
}
struct OfferItem {
uint8 itemType;
address token;
uint256 identifierOrCriteria;
uint256 startAmount;
uint256 endAmount;
}
struct ConsiderationItem {
uint8 itemType;
address token;
uint256 identifierOrCriteria;
uint256 startAmount;
uint256 endAmount;
address payable recipient;
}
struct Order {
OrderParameters parameters;
bytes signature;
}
struct AdvancedOrder {
OrderParameters parameters;
uint120 numerator;
uint120 denominator;
bytes signature;
bytes extraData;
}
function fulfillAdvancedOrder(
AdvancedOrder calldata advancedOrder,
CriteriaResolver[] calldata criteriaResolvers,
bytes32 fulfillerConduitKey,
address recipient
) external payable returns (bool fulfilled);
struct CriteriaResolver {
uint256 orderIndex;
uint8 side;
uint256 index;
uint256 identifier;
bytes32[] criteriaProof;
}
}
interface IBlurExchange {
struct Order {
address trader;
uint8 side;
address matchingPolicy;
address collection;
uint256 tokenId;
uint256 amount;
address paymentToken;
uint256 price;
uint256 listingTime;
uint256 expirationTime;
Fee[] fees;
uint256 salt;
bytes extraParams;
}
struct Fee {
uint16 rate;
address payable recipient;
}
struct Input {
Order order;
uint8 v;
bytes32 r;
bytes32 s;
bytes extraSignature;
uint8 signatureVersion;
uint256 blockNumber;
}
function execute(Input calldata sell, Input calldata buy) external payable;
}
/// @title NFT Arbitrage Contract
/// @notice Allows purchasing NFTs from OpenSea/Seaport or Blur and pocketing the difference
contract NFTArbitrage is ReentrancyGuard, Ownable {
// Marketplace contract addresses
address public constant SEAPORT_1_6 = 0x0000000000000068F116a894984e2DB1123eB395;
address public constant BLUR_EXCHANGE = 0x000000000000Ad05Ccc4F10045630fb830B95127;
// Events
event NFTPurchasedFromSeaport(uint256 indexed tokenId, address indexed collection, uint256 price, uint256 profit);
event NFTPurchasedFromBlur(uint256 indexed tokenId, address indexed collection, uint256 price, uint256 profit);
event ProfitWithdrawn(address indexed to, uint256 amount);
// Errors
error InsufficientValue();
error NFTNotReceived();
error ExternalCallFailed();
error NoProfit();
error WithdrawFailed();
error InvalidCollection();
error UnauthorizedCaller();
// State variables
mapping(address => bool) public authorizedCallers;
uint256 public totalProfit;
modifier onlyAuthorized() {
if (!authorizedCallers[msg.sender] && msg.sender != owner()) {
revert UnauthorizedCaller();
}
_;
}
constructor() Ownable(msg.sender) {
authorizedCallers[msg.sender] = true;
}
/// @notice Authorize an address to call arbitrage functions
/// @param caller Address to authorize
function authorizeCaller(address caller) external onlyOwner {
authorizedCallers[caller] = true;
}
/// @notice Remove authorization from an address
/// @param caller Address to deauthorize
function revokeCaller(address caller) external onlyOwner {
authorizedCallers[caller] = false;
}
/// @notice Purchase NFT from OpenSea/Seaport marketplace and transfer to caller
/// @param value ETH value to send with the call
/// @param data Encoded calldata for the Seaport fulfillment
/// @param expectedId Expected NFT token ID to receive
/// @param collection NFT collection contract address
function buyFromSeaport(
uint256 value,
bytes calldata data,
uint256 expectedId,
address collection
) external onlyAuthorized nonReentrant {
// Validate inputs
if (value > address(this).balance) revert InsufficientValue();
// Store balances before purchase
uint256 ethBefore = address(this).balance;
uint256 nftCountBefore = IERC721(collection).balanceOf(address(this));
// Ensure we don't already own this NFT
try IERC721(collection).ownerOf(expectedId) returns (address currentOwner) {
if (currentOwner == address(this)) {
revert NFTNotReceived();
}
} catch {
// Token doesn't exist or other error, continue
}
// Execute the Seaport call
(bool success,) = SEAPORT_1_6.call{value: value}(data);
if (!success) revert ExternalCallFailed();
// Verify we received the expected NFT
uint256 nftCountAfter = IERC721(collection).balanceOf(address(this));
if (nftCountAfter != nftCountBefore + 1) revert NFTNotReceived();
// Verify we own the expected token ID
if (IERC721(collection).ownerOf(expectedId) != address(this)) {
revert NFTNotReceived();
}
// Transfer NFT to the original caller (msg.sender = buyTargetNFT contract)
IERC721(collection).transferFrom(address(this), msg.sender, expectedId);
// Calculate actual cost and profit
uint256 actualCost = ethBefore - address(this).balance;
uint256 profit = value > actualCost ? value - actualCost : 0;
totalProfit += profit;
emit NFTPurchasedFromSeaport(expectedId, collection, actualCost, profit);
}
/// @notice Purchase NFT from Blur marketplace and transfer to caller
/// @param value ETH value to send with the call
/// @param data Encoded calldata for the Blur execution
/// @param expectedId Expected NFT token ID to receive
/// @param collection NFT collection contract address
function buyFromBlur(
uint256 value,
bytes calldata data,
uint256 expectedId,
address collection
) external onlyAuthorized nonReentrant {
// Validate inputs
if (value > address(this).balance) revert InsufficientValue();
// Store balances before purchase
uint256 ethBefore = address(this).balance;
uint256 nftCountBefore = IERC721(collection).balanceOf(address(this));
// Ensure we don't already own this NFT
try IERC721(collection).ownerOf(expectedId) returns (address currentOwner) {
if (currentOwner == address(this)) {
revert NFTNotReceived();
}
} catch {
// Token doesn't exist or other error, continue
}
// Execute the Blur call
(bool success,) = BLUR_EXCHANGE.call{value: value}(data);
if (!success) revert ExternalCallFailed();
// Verify we received the expected NFT
uint256 nftCountAfter = IERC721(collection).balanceOf(address(this));
if (nftCountAfter != nftCountBefore + 1) revert NFTNotReceived();
// Verify we own the expected token ID
if (IERC721(collection).ownerOf(expectedId) != address(this)) {
revert NFTNotReceived();
}
// Transfer NFT to the original caller (msg.sender = buyTargetNFT contract)
IERC721(collection).transferFrom(address(this), msg.sender, expectedId);
// Calculate actual cost and profit
uint256 actualCost = ethBefore - address(this).balance;
uint256 profit = value > actualCost ? value - actualCost : 0;
totalProfit += profit;
emit NFTPurchasedFromBlur(expectedId, collection, actualCost, profit);
}
/// @notice Generic function to buy from any marketplace and transfer to caller
/// @param marketplace Address of the marketplace contract
/// @param value ETH value to send with the call
/// @param data Encoded calldata for the marketplace
/// @param expectedId Expected NFT token ID to receive
/// @param collection NFT collection contract address
function buyFromMarketplace(
address marketplace,
uint256 value,
bytes calldata data,
uint256 expectedId,
address collection
) external onlyAuthorized nonReentrant {
// Validate inputs
if (value > address(this).balance) revert InsufficientValue();
// Store balances before purchase
uint256 ethBefore = address(this).balance;
uint256 nftCountBefore = IERC721(collection).balanceOf(address(this));
// Ensure we don't already own this NFT
try IERC721(collection).ownerOf(expectedId) returns (address currentOwner) {
if (currentOwner == address(this)) {
revert NFTNotReceived();
}
} catch {
// Token doesn't exist or other error, continue
}
// Execute the marketplace call
(bool success,) = marketplace.call{value: value}(data);
if (!success) revert ExternalCallFailed();
// Verify we received the expected NFT
uint256 nftCountAfter = IERC721(collection).balanceOf(address(this));
if (nftCountAfter != nftCountBefore + 1) revert NFTNotReceived();
// Verify we own the expected token ID
if (IERCSubmitted on: 2025-09-27 21:06:42
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