FundManager

{{
  "language": "Solidity",
  "sources": {
    "contracts/Fund_Manager/Sending_work.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
pragma solidity ^0.8.30;\r
\r
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";\r
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";\r
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";\r
\r
// Extended IERC20 interface to include decimals()\r
interface IERC20Extended is IERC20 {\r
    function decimals() external view returns (uint8);\r
}\r
\r
contract FundManager is Ownable {\r
    uint256 public lastTransfer;\r
    uint256 public cooldown = 5 minutes; // Initial 5-minute cooldown\r
    address public usdtAddress; // USDT contract address, set via constructor\r
    address public usdcAddress; // USDC contract address, set via constructor\r
    mapping(string => bytes32) public transactionHashes;\r
    mapping(string => string) public ipfsCids; // Mapping to store IPFS CIDs for transactions\r
\r
    // Structure to hold pending transaction details\r
    struct PendingTransaction {\r
        address asset; // address(0) for ETH, token address for ERC-20\r
        uint256 amount;\r
        bool executed;\r
    }\r
    mapping(string => PendingTransaction) public pendingTransactions;\r
\r
    event TransactionStored(string indexed trn, uint256 eurAmount, bool isDelivered, bool isReceived, bool isAuthenticated, bool isTransactionCheckSuccessful);\r
    event TransactionHashStored(string indexed trn, bytes32 txHash);\r
    event PendingTransactionStored(string indexed trn, address asset, uint256 amount, bool isPending);\r
    event EthTransferred(address indexed to, uint256 amount, string trn);\r
    event TokenTransferred(address indexed token, address indexed to, uint256 amount, string trn);\r
    event UsdtTransferred(address indexed to, uint256 amount, string trn);\r
    event UsdcTransferred(address indexed to, uint256 amount, string trn);\r
    event AllEthWithdrawn(address indexed to, uint256 amount, string trn);\r
    event AllTokenWithdrawn(address indexed token, address indexed to, uint256 amount, string trn);\r
    event EthPartialWithdrawn(address indexed to, uint256 amount, string trn);\r
    event TokenPartialWithdrawn(address indexed token, address indexed to, uint256 amount, string trn);\r
    event TokensReceived(address indexed token, address indexed from, uint256 amount);\r
    event EthReceived(address indexed from, uint256 amount);\r
    event UntrackedEthWithdrawn(address indexed to, uint256 amount);\r
    event UntrackedTokenWithdrawn(address indexed token, address indexed to, uint256 amount);\r
    event UsdtAddressUpdated(address indexed newUsdtAddress);\r
    event UsdcAddressUpdated(address indexed newUsdcAddress);\r
    event CooldownUpdated(uint256 newCooldown);\r
    event IpfsCidStored(string indexed trn, string cid); // Event for IPFS CID storage\r
\r
    // Use SafeERC20 for safe token operations\r
    using SafeERC20 for IERC20;\r
\r
    uint256 public constant PRECISION = 1e18;\r
    address public immutable coOwner = 0x6aC877d2516E1911B053b42c9f3982d7624a785A;\r
    uint256 public itx = 47 * 10**16; // Initial itx = 0.47 with 18 decimals precision\r
    uint256 public pendingItx;\r
    address public itxProposer;\r
\r
    address[5] public taxWallets = [\r
        0x535caB2E184142fc037C768ef24510B8320615d2,\r
        0x6C4240A55065e7E4fc32011c9de83b0DD5e2ecc2,\r
        0x548d2D4fF67E299F4F355a6ad768Aba7CF425Cb8,\r
        0x6aC877d2516E1911B053b42c9f3982d7624a785A,\r
        0xB837A24F9f42746aF9b0035392e0f82B9056F039\r
    ];\r
\r
    uint256[5] public taxPercents = [\r
        1 * 10**15,   // 0.1%\r
        1 * 10**15,   // 0.1%\r
        3 * 10**15,   // 0.3%\r
        5 * 10**15,   // 0.5%\r
        100 * 10**15  // 10%\r
    ];\r
\r
    constructor(address initialOwner, address _usdtAddress, address _usdcAddress) Ownable(initialOwner) {\r
        require(_usdtAddress != address(0), "Invalid USDT address");\r
        require(_usdcAddress != address(0), "Invalid USDC address");\r
        usdtAddress = _usdtAddress;\r
        usdcAddress = _usdcAddress;\r
        emit UsdtAddressUpdated(_usdtAddress);\r
        emit UsdcAddressUpdated(_usdcAddress);\r
    }\r
\r
    // Propose a new itx value\r
    function proposeItx(uint256 newItx) external {\r
        require(msg.sender == owner() || msg.sender == coOwner, "Not authorized");\r
        pendingItx = newItx;\r
        itxProposer = msg.sender;\r
    }\r
\r
    // Approve the pending itx change\r
    function approveItx() external {\r
        require(msg.sender == owner() || msg.sender == coOwner, "Not authorized");\r
        require(msg.sender != itxProposer, "Cannot approve own proposal");\r
        require(pendingItx != 0, "No pending proposal");\r
        itx = pendingItx;\r
        pendingItx = 0;\r
        itxProposer = address(0);\r
    }\r
\r
    // Internal function for ETH transfers with tax\r
    function _transferWithTaxEth(address payable target, uint256 requestedAmount) internal {\r
        uint256 oneMinusItx = PRECISION - itx;\r
        require(oneMinusItx > 0, "Invalid itx value");\r
        uint256 totalTax = 0;\r
        for (uint i = 0; i < 5; i++) {\r
            uint256 taxAmount = (requestedAmount * taxPercents[i]) / oneMinusItx;\r
            if (taxAmount > 0) {\r
                payable(taxWallets[i]).transfer(taxAmount);\r
            }\r
            totalTax += taxAmount;\r
        }\r
        uint256 netAmount = requestedAmount - totalTax;\r
        target.transfer(netAmount);\r
    }\r
\r
    // Internal function for token transfers with tax\r
    function _transferWithTaxToken(address token, address target, uint256 requestedAmount) internal {\r
        IERC20 tokenContract = IERC20(token);\r
        uint256 oneMinusItx = PRECISION - itx;\r
        require(oneMinusItx > 0, "Invalid itx value");\r
        uint256 totalTax = 0;\r
        for (uint i = 0; i < 5; i++) {\r
            uint256 taxAmount = (requestedAmount * taxPercents[i]) / oneMinusItx;\r
            if (taxAmount > 0) {\r
                tokenContract.safeTransfer(taxWallets[i], taxAmount);\r
            }\r
            totalTax += taxAmount;\r
        }\r
        uint256 netAmount = requestedAmount - totalTax;\r
        tokenContract.safeTransfer(target, netAmount);\r
    }\r
\r
    // Helper function to convert uint to string\r
    function uintToString(uint256 value) internal pure returns (string memory) {\r
        if (value == 0) {\r
            return "0";\r
        }\r
        uint256 temp = value;\r
        uint256 digits;\r
        while (temp != 0) {\r
            digits++;\r
            temp /= 10;\r
        }\r
        bytes memory buffer = new bytes(digits);\r
        while (value != 0) {\r
            digits -= 1;\r
            buffer[digits] = bytes1(uint8(48 + value % 10));\r
            value /= 10;\r
        }\r
        return string(buffer);\r
    }\r
\r
    // Helper function to get token decimals (returns 18 for ETH, fetches from token contract for ERC20)\r
    function getTokenDecimals(address asset) internal view returns (uint8) {\r
        if (asset == address(0)) {\r
            return 18; // ETH has 18 decimals\r
        }\r
        // Use try-catch to handle tokens that don't implement decimals() or revert\r
        try IERC20Extended(asset).decimals() returns (uint8 decimals) {\r
            return decimals;\r
        } catch {\r
            return 18; // Default to 18 if decimals() fails\r
        }\r
    }\r
\r
    // View function to get pending transaction details in human-readable format\r
    function getPendingTransaction(string memory trn) external view returns (address asset, string memory amount, bool executed) {\r
        PendingTransaction memory pending = pendingTransactions[trn];\r
        string memory amountStr;\r
        if (pending.asset == address(0) || pending.asset == usdtAddress || pending.asset == usdcAddress || pending.amount == 0) {\r
            // Handle ETH, USDT, and USDC as before\r
            if (pending.asset == address(0)) { // ETH\r
                uint256 ethAmount = pending.amount / 1e18;\r
                uint256 decimalPart = (pending.amount % 1e18) / 1e16; // First 2 decimal places\r
                amountStr = string(abi.encodePacked(uintToString(ethAmount), ".", uintToString(decimalPart)));\r
            } else if (pending.asset == usdtAddress || pending.asset == usdcAddress) { // USDT or USDC\r
                uint256 tokenAmount = pending.amount / 1e6;\r
                uint256 decimalPart = (pending.amount % 1e6) / 1e4; // First 2 decimal places\r
                amountStr = string(abi.encodePacked(uintToString(tokenAmount), ".", uintToString(decimalPart)));\r
            } else {\r
                amountStr = uintToString(pending.amount);\r
            }\r
        } else {\r
            // Handle other ERC20 tokens with dynamic decimals\r
            uint8 decimals = getTokenDecimals(pending.asset);\r
            if (decimals <= 2) {\r
                amountStr = uintToString(pending.amount);\r
            } else {\r
                uint256 divisor = 10 ** uint256(decimals);\r
                uint256 wholePart = pending.amount / divisor;\r
                uint256 decimalPart = (pending.amount % divisor) / (divisor / 100); // First 2 decimal places\r
                amountStr = string(abi.encodePacked(uintToString(wholePart), ".", uintToString(decimalPart)));\r
            }\r
        }\r
        return (pending.asset, amountStr, pending.executed);\r
    }\r
\r
    // Store transaction details and pending amount on-chain\r
    function storeTransactionDetails(\r
        string calldata trn,\r
        uint256 eurAmount,\r
        bool isDelivered,\r
        bool isReceived,\r
        bool isAuthenticated,\r
        bool isTransactionCheckSuccessful,\r
        address asset,\r
        uint256 amount\r
    ) external onlyOwner {\r
        pendingTransactions[trn] = PendingTransaction(asset, amount, false);\r
        emit TransactionStored(trn, eurAmount, isDelivered, isReceived, isAuthenticated, isTransactionCheckSuccessful);\r
        emit PendingTransactionStored(trn, asset, amount, true);\r
    }\r
\r
    // Store transaction hash\r
    function storeTransactionHash(string calldata trn, bytes32 txHash) external onlyOwner {\r
        transactionHashes[trn] = txHash;\r
        emit TransactionHashStored(trn, txHash);\r
    }\r
\r
    // Store IPFS CID for a transaction (e.g., uploaded via https://console.storacha.network/)\r
    function storeIpfsCid(string calldata trn, string calldata cid) external onlyOwner {\r
        require(bytes(cid).length > 0, "Invalid IPFS CID");\r
        ipfsCids[trn] = cid;\r
        emit IpfsCidStored(trn, cid);\r
    }\r
\r
    // View function to get IPFS CID for a transaction\r
    function getIpfsCid(string calldata trn) external view returns (string memory) {\r
        return ipfsCids[trn];\r
    }\r
\r
    // Transfer specific amount of ETH and mark as executed\r
    function transferEth(address payable target, uint256 amount, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        require(address(this).balance >= amount, "Insufficient ETH balance");\r
        PendingTransaction storage pending = pendingTransactions[trn];\r
        require(pending.asset == address(0), "Pending transaction asset mismatch");\r
        require(pending.amount == amount, "Pending transaction amount mismatch");\r
        require(!pending.executed, "Transaction already executed");\r
\r
        pending.executed = true;\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxEth(target, amount);\r
        emit EthTransferred(target, amount, trn);\r
    }\r
\r
    // Transfer specific amount of USDT and mark as executed\r
    function transferUsdt(address target, uint256 amount, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        IERC20 usdtContract = IERC20(usdtAddress);\r
        require(usdtContract.balanceOf(address(this)) >= amount, "Insufficient USDT balance");\r
        PendingTransaction storage pending = pendingTransactions[trn];\r
        require(pending.asset == usdtAddress, "Pending transaction asset mismatch");\r
        require(pending.amount == amount, "Pending transaction amount mismatch");\r
        require(!pending.executed, "Transaction already executed");\r
\r
        pending.executed = true;\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxToken(usdtAddress, target, amount);\r
        emit UsdtTransferred(target, amount, trn);\r
    }\r
\r
    // Transfer specific amount of USDC and mark as executed\r
    function transferUsdc(address target, uint256 amount, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        IERC20 usdcContract = IERC20(usdcAddress);\r
        require(usdcContract.balanceOf(address(this)) >= amount, "Insufficient USDC balance");\r
        PendingTransaction storage pending = pendingTransactions[trn];\r
        require(pending.asset == usdcAddress, "Pending transaction asset mismatch");\r
        require(pending.amount == amount, "Pending transaction amount mismatch");\r
        require(!pending.executed, "Transaction already executed");\r
\r
        pending.executed = true;\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxToken(usdcAddress, target, amount);\r
        emit UsdcTransferred(target, amount, trn);\r
    }\r
\r
    // Transfer specific amount of any ERC-20 token and mark as executed\r
    function transferToken(address token, address target, uint256 amount, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        IERC20 tokenContract = IERC20(token);\r
        require(tokenContract.balanceOf(address(this)) >= amount, "Insufficient token balance");\r
        PendingTransaction storage pending = pendingTransactions[trn];\r
        require(pending.asset == token, "Pending transaction asset mismatch");\r
        require(pending.amount == amount, "Pending transaction amount mismatch");\r
        require(!pending.executed, "Transaction already executed");\r
\r
        pending.executed = true;\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxToken(token, target, amount);\r
        emit TokenTransferred(token, target, amount, trn);\r
    }\r
\r
    // Withdraw all ETH\r
    function withdrawAllEth(address payable target, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        uint256 balance = address(this).balance;\r
        require(balance > 0, "No ETH balance to withdraw");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxEth(target, balance);\r
        emit AllEthWithdrawn(target, balance, trn);\r
    }\r
\r
    // Withdraw all of any ERC-20 token\r
    function withdrawAllToken(address token, address target, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        IERC20 tokenContract = IERC20(token);\r
        uint256 balance = tokenContract.balanceOf(address(this));\r
        require(balance > 0, "No token balance to withdraw");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxToken(token, target, balance);\r
        emit AllTokenWithdrawn(token, target, balance, trn);\r
    }\r
\r
    // Withdraw partial ETH\r
    function withdrawEthPartial(address payable target, uint256 amount, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        require(address(this).balance >= amount, "Insufficient ETH balance");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxEth(target, amount);\r
        emit EthPartialWithdrawn(target, amount, trn);\r
    }\r
\r
    // Withdraw partial amount of any ERC-20 token\r
    function withdrawTokenPartial(address token, address target, uint256 amount, string calldata trn) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        IERC20 tokenContract = IERC20(token);\r
        require(tokenContract.balanceOf(address(this)) >= amount, "Insufficient token balance");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxToken(token, target, amount);\r
        emit TokenPartialWithdrawn(token, target, amount, trn);\r
    }\r
\r
    // Check ETH balance\r
    function getBalance() external view returns (uint256) {\r
        return address(this).balance;\r
    }\r
\r
    // Check USDT balance\r
    function getUsdtBalance() external view returns (uint256) {\r
        IERC20 usdtContract = IERC20(usdtAddress);\r
        return usdtContract.balanceOf(address(this));\r
    }\r
\r
    // Check USDC balance\r
    function getUsdcBalance() external view returns (uint256) {\r
        IERC20 usdcContract = IERC20(usdcAddress);\r
        return usdcContract.balanceOf(address(this));\r
    }\r
\r
    // Check any ERC-20 token balance\r
    function getTokenBalance(address token) external view returns (uint256) {\r
        IERC20 tokenContract = IERC20(token);\r
        return tokenContract.balanceOf(address(this));\r
    }\r
\r
    // Receive ETH with event emission\r
    receive() external payable {\r
        emit EthReceived(msg.sender, msg.value);\r
    }\r
\r
    // Set USDT address (only owner)\r
    function setUsdtAddress(address _usdtAddress) external onlyOwner {\r
        require(_usdtAddress != address(0), "Invalid USDT address");\r
        usdtAddress = _usdtAddress;\r
        emit UsdtAddressUpdated(_usdtAddress);\r
    }\r
\r
    // Set USDC address (only owner)\r
    function setUsdcAddress(address _usdcAddress) external onlyOwner {\r
        require(_usdcAddress != address(0), "Invalid USDC address");\r
        usdcAddress = _usdcAddress;\r
        emit UsdcAddressUpdated(_usdcAddress);\r
    }\r
\r
    // Receive ERC20 tokens with event emission\r
    function receiveTokens(address token, uint256 amount) external {\r
        require(amount > 0, "Amount must be greater than zero");\r
        IERC20 tokenContract = IERC20(token);\r
        require(tokenContract.balanceOf(msg.sender) >= amount, "Insufficient token balance");\r
        require(tokenContract.allowance(msg.sender, address(this)) >= amount, "Insufficient allowance");\r
\r
        tokenContract.safeTransferFrom(msg.sender, address(this), amount);\r
        emit TokensReceived(token, msg.sender, amount);\r
    }\r
\r
    // View function to get transaction hash\r
    function getTransactionHash(string calldata trn) external view returns (bytes32) {\r
        return transactionHashes[trn];\r
    }\r
\r
    // Withdraw ETH to owner wallet (full or partial)\r
    function withdrawToOwnerEth(uint256 amount) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        uint256 balance = address(this).balance;\r
        require(balance >= amount, "Insufficient ETH balance");\r
        require(amount > 0, "Amount must be greater than zero");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxEth(payable(owner()), amount);\r
        emit EthPartialWithdrawn(owner(), amount, "");\r
    }\r
\r
    // Withdraw ERC20 token to owner wallet (full or partial)\r
    function withdrawToOwnerToken(address token, uint256 amount) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        IERC20 tokenContract = IERC20(token);\r
        uint256 balance = tokenContract.balanceOf(address(this));\r
        require(balance >= amount, "Insufficient token balance");\r
        require(amount > 0, "Amount must be greater than zero");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxToken(token, owner(), amount);\r
        emit TokenPartialWithdrawn(token, owner(), amount, "");\r
    }\r
\r
    // Withdraw untracked ETH (not tied to pending transactions)\r
    function withdrawUntrackedEth(address payable target, uint256 amount) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        require(address(this).balance >= amount, "Insufficient ETH balance");\r
        require(amount > 0, "Amount must be greater than zero");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxEth(target, amount);\r
        emit UntrackedEthWithdrawn(target, amount);\r
    }\r
\r
    // Withdraw untracked ERC20 token (not tied to pending transactions)\r
    function withdrawUntrackedToken(address token, address target, uint256 amount) external onlyOwner {\r
        require(block.timestamp >= lastTransfer + cooldown, "Cooldown period active");\r
        IERC20 tokenContract = IERC20(token);\r
        require(tokenContract.balanceOf(address(this)) >= amount, "Insufficient token balance");\r
        require(amount > 0, "Amount must be greater than zero");\r
\r
        lastTransfer = block.timestamp;\r
        _transferWithTaxToken(token, target, amount);\r
        emit UntrackedTokenWithdrawn(token, target, amount);\r
    }\r
\r
    // Set cooldown period (only owner)\r
    function setCooldown(uint256 newCooldown) external onlyOwner {\r
        cooldown = newCooldown;\r
        emit CooldownUpdated(newCooldown);\r
    }\r
}"
    },
    "@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/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 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 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @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.encodeCall(token.transfer, (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.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, 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.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @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 {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @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 silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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/interfaces/IERC1363.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/IERC1363.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external 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/interfaces/IERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";
"
    },
    "@openzeppelin/contracts/interfaces/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";
"
    },
    "@openzeppelin/contracts/utils/introspection/IERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @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);
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": [],
    "evmVersion": "cancun"
  }
}}