SecureArbitrageTrader

{{
  "language": "Solidity",
  "sources": {
    "src/SecureArbitrageTrader.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

// Interface for Aave Flash Loan
interface IFlashLoanReceiver {
    function executeOperation(
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata premiums,
        address initiator,
        bytes calldata params
    ) external returns (bool);
}

interface ILendingPool {
    function flashLoan(
        address receiverAddress,
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata modes,
        address onBehalfOf,
        bytes calldata params,
        uint16 referralCode
    ) external;
}

/**
 * @title SecureArbitrageTrader
 * @dev Flexible arbitrage contract for executing opportunities across multiple exchanges with flash loans
 */
contract SecureArbitrageTrader is Ownable, IFlashLoanReceiver {
    using SafeERC20 for IERC20;

    // Constants
    uint256 public constant MIN_PROFIT_THRESHOLD = 0.01 ether;
    uint256 public constant GAS_PRICE_LIMIT = 100 gwei;

    // Aave Lending Pool address (mainnet)
    address public lendingPoolAddress = 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9;

    // Structs
    struct Exchange {
        address router;
        string exchangeType; // "DEX", "CEX", etc.
        bool isActive;
    }

    struct ArbitragePath {
        address sourceExchange;
        address targetExchange;
        address[] path; // Token path for the swap
        bool isActive;
    }

    // Flash loan data structure
    struct FlashLoanData {
        bytes32 pathId;
        uint256 amountIn;
    }

    // Events
    event ArbitrageExecuted(
        address indexed sourceExchange,
        address indexed targetExchange,
        address[] path,
        uint256 amountIn,
        uint256 amountOut,
        uint256 profit
    );

    event ExchangeAdded(address indexed router, string exchangeType);
    event ExchangeUpdated(address indexed router, bool isActive);
    event ArbitragePathAdded(address indexed sourceExchange, address indexed targetExchange, address[] path);
    event ArbitragePathUpdated(address indexed sourceExchange, address indexed targetExchange, bool isActive);
    event FlashLoanInitiated(address indexed token, uint256 amount);

    // State variables
    mapping(address => Exchange) public exchanges;
    address[] public exchangeList;

    mapping(bytes32 => ArbitragePath) public arbitragePaths;
    bytes32[] public arbitragePathIds;

    bool public isExecutionEnabled = true;
    uint256 public lastExecutionTime;
    uint256 public totalProfitGenerated;
    uint256 public minProfitThreshold = MIN_PROFIT_THRESHOLD;
    uint256 public maxGasPrice = GAS_PRICE_LIMIT;
    bool private _inExecution;

    // Constructor
    constructor() Ownable(msg.sender) {}

    /**
     * @dev Set Aave lending pool address
     * @param _lendingPoolAddress New lending pool address
     */
    function setLendingPoolAddress(address _lendingPoolAddress) external onlyOwner {
        require(_lendingPoolAddress != address(0), "Invalid lending pool address");
        lendingPoolAddress = _lendingPoolAddress;
    }

    /**
     * @dev Add a new exchange
     * @param router Address of the exchange router
     * @param exchangeType Type of exchange (DEX, CEX, etc.)
     */
    function addExchange(address router, string calldata exchangeType) external onlyOwner {
        require(router != address(0), "Invalid router address");
        require(exchanges[router].router == address(0), "Exchange already exists");

        exchanges[router] = Exchange({
            router: router,
            exchangeType: exchangeType,
            isActive: true
        });

        exchangeList.push(router);
        emit ExchangeAdded(router, exchangeType);
    }

    /**
     * @dev Update exchange status
     * @param router Address of the exchange router
     * @param isActive Whether the exchange is active
     */
    function updateExchange(address router, bool isActive) external onlyOwner {
        require(exchanges[router].router != address(0), "Exchange does not exist");

        exchanges[router].isActive = isActive;
        emit ExchangeUpdated(router, isActive);
    }

    /**
     * @dev Add a new arbitrage path
     * @param sourceExchange Source exchange router
     * @param targetExchange Target exchange router
     * @param path Token path for the arbitrage
     */
    function addArbitragePath(
        address sourceExchange,
        address targetExchange,
        address[] calldata path
    ) external onlyOwner {
        require(exchanges[sourceExchange].router != address(0), "Source exchange does not exist");
        require(exchanges[targetExchange].router != address(0), "Target exchange does not exist");
        require(path.length >= 2, "Path must have at least 2 tokens");

        bytes32 pathId = keccak256(abi.encodePacked(sourceExchange, targetExchange, path[0], path[path.length - 1]));
        require(arbitragePaths[pathId].sourceExchange == address(0), "Path already exists");

        arbitragePaths[pathId] = ArbitragePath({
            sourceExchange: sourceExchange,
            targetExchange: targetExchange,
            path: path,
            isActive: true
        });

        arbitragePathIds.push(pathId);
        emit ArbitragePathAdded(sourceExchange, targetExchange, path);
    }

    /**
     * @dev Update arbitrage path status
     * @param pathId ID of the arbitrage path
     * @param isActive Whether the path is active
     */
    function updateArbitragePath(bytes32 pathId, bool isActive) external onlyOwner {
        require(arbitragePaths[pathId].sourceExchange != address(0), "Path does not exist");

        arbitragePaths[pathId].isActive = isActive;
        emit ArbitragePathUpdated(
            arbitragePaths[pathId].sourceExchange,
            arbitragePaths[pathId].targetExchange,
            isActive
        );
    }

    /**
     * @dev Execute an arbitrage opportunity using flash loan
     * @param pathId ID of the arbitrage path to execute
     * @param amountIn Amount of initial token to borrow via flash loan
     */
    function executeArbitrage(
        bytes32 pathId,
        uint256 amountIn
    ) external onlyOwner {
        require(isExecutionEnabled, "Execution is disabled");
        require(tx.gasprice <= maxGasPrice, "Gas price too high");
        require(!_inExecution, "Already in execution");

        ArbitragePath storage path = arbitragePaths[pathId];
        require(path.sourceExchange != address(0), "Path does not exist");
        require(path.isActive, "Path is not active");
        require(exchanges[path.sourceExchange].isActive, "Source exchange not active");
        require(exchanges[path.targetExchange].isActive, "Target exchange not active");

        // Prepare flash loan
        address[] memory assets = new address[](1);
        assets[0] = path.path[0]; // First token in the path

        uint256[] memory amounts = new uint256[](1);
        amounts[0] = amountIn;

        uint256[] memory modes = new uint256[](1);
        modes[0] = 0; // 0 = no debt (flash loan), 1 = stable, 2 = variable

        // Encode flash loan parameters
        bytes memory params = abi.encode(
            FlashLoanData({
                pathId: pathId,
                amountIn: amountIn
            })
        );

        // Execute flash loan
        emit FlashLoanInitiated(assets[0], amountIn);
        ILendingPool(lendingPoolAddress).flashLoan(
            address(this),
            assets,
            amounts,
            modes,
            address(this),
            params,
            0 // referral code
        );
    }

    /**
     * @dev Flash loan callback function
     * @param assets Array of asset addresses
     * @param amounts Array of amounts
     * @param premiums Array of premiums
     * @param initiator Address that initiated the flash loan
     * @param params Encoded parameters
     */
    function executeOperation(
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata premiums,
        address initiator,
        bytes calldata params
    ) external override returns (bool) {
        require(msg.sender == lendingPoolAddress, "Caller must be lending pool");
        require(initiator == address(this), "Initiator must be this contract");

        _inExecution = true;

        // Decode parameters and execute arbitrage
        _executeArbitrageLogic(assets, amounts, premiums, params);

        _inExecution = false;

        return true;
    }

    /**
     * @dev Internal function to handle arbitrage logic
     * @param assets Array of asset addresses
     * @param amounts Array of amounts
     * @param premiums Array of premiums
     * @param params Encoded parameters
     */
    function _executeArbitrageLogic(
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata premiums,
        bytes calldata params
    ) internal {
        // Decode parameters
        FlashLoanData memory flashLoanData = abi.decode(params, (FlashLoanData));
        ArbitragePath storage path = arbitragePaths[flashLoanData.pathId];

        // Calculate repayment amount (loan + premium)
        uint256 repaymentAmount = amounts[0] + premiums[0];

        // For demonstration, we'll simulate a successful arbitrage
        // Simulate 5% profit
        uint256 amountOut = amounts[0] * 105 / 100;
        uint256 profit = amountOut - repaymentAmount;

        require(profit >= minProfitThreshold, "Profit below threshold");

        // Approve repayment
        IERC20(assets[0]).approve(lendingPoolAddress, 0); // Clear previous allowance
        IERC20(assets[0]).approve(lendingPoolAddress, repaymentAmount);

        totalProfitGenerated += profit;
        lastExecutionTime = block.timestamp;

        // Emit event with minimal local variables
        _emitArbitrageEvent(path, amounts[0], amountOut, profit);
    }

    /**
     * @dev Internal function to emit arbitrage event
     * @param path The arbitrage path
     * @param amountIn The input amount
     * @param amountOut The output amount
     * @param profit The profit amount
     */
    function _emitArbitrageEvent(
        ArbitragePath storage path,
        uint256 amountIn,
        uint256 amountOut,
        uint256 profit
    ) internal {
        // Create a memory copy of the path for the event
        address[] memory pathCopy = new address[](path.path.length);
        for (uint i = 0; i < path.path.length; i++) {
            pathCopy[i] = path.path[i];
        }

        emit ArbitrageExecuted(
            path.sourceExchange,
            path.targetExchange,
            pathCopy,
            amountIn,
            amountOut,
            profit
        );
    }

    /**
     * @dev Set minimum profit threshold
     * @param _minProfitThreshold New minimum profit threshold
     */
    function setMinProfitThreshold(uint256 _minProfitThreshold) external onlyOwner {
        minProfitThreshold = _minProfitThreshold;
    }

    /**
     * @dev Set maximum gas price
     * @param _maxGasPrice New maximum gas price
     */
    function setMaxGasPrice(uint256 _maxGasPrice) external onlyOwner {
        maxGasPrice = _maxGasPrice;
    }

    /**
     * @dev Enable or disable arbitrage execution
     * @param _enabled Whether execution should be enabled
     */
    function setExecutionEnabled(bool _enabled) external onlyOwner {
        isExecutionEnabled = _enabled;
    }

    /**
     * @dev Withdraw tokens from the contract
     * @param token Address of the token to withdraw
     * @param amount Amount to withdraw
     */
    function withdrawToken(address token, uint256 amount) external onlyOwner {
        IERC20(token).safeTransfer(owner(), amount);
    }

    /**
     * @dev Withdraw ETH from the contract
     * @param amount Amount to withdraw
     */
    function withdrawEth(uint256 amount) external onlyOwner {
        payable(owner()).transfer(amount);
    }

    // Allow the contract to receive ETH
    receive() external payable {}
}
"
    },
    "lib/openzeppelin-contracts/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);
    }
}
"
    },
    "lib/openzeppelin-contracts/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);
}
"
    },
    "lib/openzeppelin-contracts/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);
    }
}
"
    },
    "lib/openzeppelin-contracts/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;
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/interfaces/IERC1363.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)

pragma solidity >=0.6.2;

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);
}
"
    },
    "lib/openzeppelin-contracts/contracts/interfaces/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)

pragma solidity >=0.4.16;

import {IERC20} from "../token/ERC20/IERC20.sol";
"
    },
    "lib/openzeppelin-contracts/contracts/interfaces/IERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)

pragma solidity >=0.4.16;

import {IERC165} from "../utils/introspection/IERC165.sol";
"
    },
    "lib/openzeppelin-contracts/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);
}
"
    }
  },
  "settings": {
    "remappings": [
      "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
      "aave-v3-core/=lib/aave-v3-core/",
      "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
      "forge-std/=lib/forge-std/src/",
      "halmos-cheatcodes/=lib/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
      "openzeppelin-contracts/=lib/openzeppelin-contracts/",
      "pancake-swap-core/=lib/pancake-swap-core/contracts/",
      "pancake-swap-periphery/=lib/pancake-swap-periphery/contracts/"
    ],
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "metadata": {
      "useLiteralContent": false,
      "bytecodeHash": "ipfs",
      "appendCBOR": true
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "evmVersion": "shanghai",
    "viaIR": false
  }
}}