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/// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "./IAssetCheckerFeature.sol";


contract AssetCheckerFeature is IAssetCheckerFeature {

    bytes4 public constant INTERFACE_ID_ERC20 = 0x36372b07;
    bytes4 public constant INTERFACE_ID_ERC721 = 0x80ac58cd;
    bytes4 public constant INTERFACE_ID_ERC1155 = 0xd9b67a26;
    address internal constant NATIVE_TOKEN_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    function checkAssetsEx(
        address account,
        address operator,
        uint8[] calldata itemTypes,
        address[] calldata tokens,
        uint256[] calldata tokenIds
    )
        external
        override
        view
        returns (AssetCheckResultInfo[] memory infos)
    {
        require(itemTypes.length == tokens.length, "require(itemTypes.length == tokens.length)");
        require(itemTypes.length == tokenIds.length, "require(itemTypes.length == tokenIds.length)");

        infos = new AssetCheckResultInfo[](tokens.length);
        for (uint256 i = 0; i < tokens.length; i++) {
            address token = tokens[i];
            uint256 tokenId = tokenIds[i];

            infos[i].itemType = itemTypes[i];
            if (itemTypes[i] == 0) {
                infos[i].allowance = isApprovedForAll(token, account, operator) ? 1 : 0;
                infos[i].erc721Owner = ownerOf(token, tokenId);
                infos[i].erc721ApprovedAccount = getApproved(token, tokenId);
                infos[i].balance = (infos[i].erc721Owner == account) ? 1 : 0;
                continue;
            }

            if (itemTypes[i] == 1) {
                infos[i].allowance = isApprovedForAll(token, account, operator) ? 1 : 0;
                infos[i].balance = balanceOf(token, account, tokenId);
                continue;
            }

            if (itemTypes[i] == 2) {
                if (token == address(0) || token == NATIVE_TOKEN_ADDRESS) {
                    infos[i].balance = account.balance;
                    infos[i].allowance = type(uint256).max;
                } else {
                    infos[i].balance = balanceOf(token, account);
                    infos[i].allowance = allowanceOf(token, account, operator);
                }
            }
        }
        return infos;
    }

    function checkAssets(address account, address operator, address[] calldata tokens, uint256[] calldata tokenIds)
        external
        override
        view
        returns (AssetCheckResultInfo[] memory infos)
    {
        require(tokens.length == tokenIds.length, "require(tokens.length == tokenIds.length)");

        infos = new AssetCheckResultInfo[](tokens.length);
        for (uint256 i = 0; i < tokens.length; i++) {
            address token = tokens[i];
            uint256 tokenId = tokenIds[i];

            if (supportsInterface(token, INTERFACE_ID_ERC721)) {
                infos[i].itemType = 0;
                infos[i].allowance = isApprovedForAll(token, account, operator) ? 1 : 0;
                infos[i].erc721Owner = ownerOf(token, tokenId);
                infos[i].erc721ApprovedAccount = getApproved(token, tokenId);
                infos[i].balance = (infos[i].erc721Owner == account) ? 1 : 0;
                continue;
            }

            if (supportsInterface(token, INTERFACE_ID_ERC1155)) {
                infos[i].itemType = 1;
                infos[i].allowance = isApprovedForAll(token, account, operator) ? 1 : 0;
                infos[i].balance = balanceOf(token, account, tokenId);
                continue;
            }

            if (supportsInterface(token, INTERFACE_ID_ERC20)) {
                infos[i].itemType = 2;
                if (token == address(0) || token == NATIVE_TOKEN_ADDRESS) {
                    infos[i].balance = account.balance;
                    infos[i].allowance = type(uint256).max;
                } else {
                    infos[i].balance = balanceOf(token, account);
                    infos[i].allowance = allowanceOf(token, account, operator);
                }
            } else {
                infos[i].itemType = 255;
            }
        }
        return infos;
    }

    function supportsInterface(address nft, bytes4 interfaceId) internal view returns (bool) {
        try IERC165(nft).supportsInterface(interfaceId) returns (bool support) {
            return support;
        } catch {
        }
        return false;
    }

    function ownerOf(address nft, uint256 tokenId) internal view returns (address owner) {
        try IERC721(nft).ownerOf(tokenId) returns (address _owner) {
            owner = _owner;
        } catch {
        }
        return owner;
    }

    function getApproved(address nft, uint256 tokenId) internal view returns (address operator) {
        try IERC721(nft).getApproved(tokenId) returns (address approvedAccount) {
            operator = approvedAccount;
        } catch {
        }
        return operator;
    }

    function isApprovedForAll(address nft, address owner, address operator) internal view returns (bool isApproved) {
        if (operator != address(0)) {
            try IERC721(nft).isApprovedForAll(owner, operator) returns (bool _isApprovedForAll) {
                isApproved = _isApprovedForAll;
            } catch {
            }
        }
        return isApproved;
    }

    function balanceOf(address erc20, address account) internal view returns (uint256 balance) {
        try IERC20(erc20).balanceOf(account) returns (uint256 _balance) {
            balance = _balance;
        } catch {
        }
        return balance;
    }

    function allowanceOf(address erc20, address owner, address spender) internal view returns (uint256 allowance) {
        try IERC20(erc20).allowance(owner, spender) returns (uint256 _allowance) {
            allowance = _allowance;
        } catch {
        }
        return allowance;
    }

    function balanceOf(address nft, address account, uint256 id) internal view returns (uint256 balance) {
        try IERC1155(nft).balanceOf(account, id) returns (uint256 _balance) {
            balance = _balance;
        } catch {
        }
        return balance;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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`, 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 be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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 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);

    /**
     * @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;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 be 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

pragma solidity ^0.8.15;


interface IAssetCheckerFeature {

    struct AssetCheckResultInfo {
        uint8 itemType; // 0: ERC721, 1: ERC1155, 2: ERC20, 255: other
        uint256 allowance;
        uint256 balance;
        address erc721Owner;
        address erc721ApprovedAccount;
    }

    function checkAssetsEx(
        address account,
        address operator,
        uint8[] calldata itemTypes,
        address[] calldata tokens,
        uint256[] calldata tokenIds
    )
        external
        view
        returns (AssetCheckResultInfo[] memory infos);

    function checkAssets(
        address account,
        address operator,
        address[] calldata tokens,
        uint256[] calldata tokenIds
    )
        external
        view
        returns (AssetCheckResultInfo[] memory infos);
}

// 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);
}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"name":"INTERFACE_ID_ERC1155","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INTERFACE_ID_ERC20","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INTERFACE_ID_ERC721","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"address","name":"operator","type":"address"},{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"checkAssets","outputs":[{"components":[{"internalType":"uint8","name":"itemType","type":"uint8"},{"internalType":"uint256","name":"allowance","type":"uint256"},{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"address","name":"erc721Owner","type":"address"},{"internalType":"address","name":"erc721ApprovedAccount","type":"address"}],"internalType":"struct IAssetCheckerFeature.AssetCheckResultInfo[]","name":"infos","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"address","name":"operator","type":"address"},{"internalType":"uint8[]","name":"itemTypes","type":"uint8[]"},{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"checkAssetsEx","outputs":[{"components":[{"internalType":"uint8","name":"itemType","type":"uint8"},{"internalType":"uint256","name":"allowance","type":"uint256"},{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"address","name":"erc721Owner","type":"address"},{"internalType":"address","name":"erc721ApprovedAccount","type":"address"}],"internalType":"struct IAssetCheckerFeature.AssetCheckResultInfo[]","name":"infos","type":"tuple[]"}],"stateMutability":"view","type":"function"}]

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