// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.17;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";


interface IMetaAggregatorManager {
    function swap(
        IERC20 tokenIn,
        IERC20 tokenOut,
        address aggregator,
        bytes calldata swapData,
        uint256 amountIn,
        uint256 minAmountOut,
        address receiver,
        bool isDelegate
    ) external;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.17;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";


interface IMetaAggregatorSwapContract {
    function swapERC20(
        IERC20 tokenIn,
        IERC20 tokenOut,
        address aggregator,
        bytes calldata swapData,
        uint256 amountIn,
        uint256 minAmountOut,
        address receiver,
        bool isDelegate
    ) external;

    function swapETH(
        address tokenIn,
        IERC20 tokenOut,
        address aggregator,
        bytes calldata swapData,
        uint256 amountIn,
        uint256 minAmountOut,
        address receiver,
        bool isDelegate
    ) external payable;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.17;

import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {IMetaAggregatorSwapContract} from "./interfaces/IMetaAggregatorSwapContract.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IMetaAggregatorManager} from "./interfaces/IMetaAggregatorManager.sol";
import {TransferHelper} from "./libraries/TransferHelper.sol";
/**
 * @title MetaAggregatorManager
 * @dev This contract manages the swapping of tokens through a meta aggregator.
 */
contract MetaAggregatorManager is ReentrancyGuard, IMetaAggregatorManager {
    IMetaAggregatorSwapContract immutable MetaAggregatorSwap;
    address nativeToken = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    // Custom error definitions
    error CannotSwapETH();
    error InvalidMetaAggregatorAddress();


    /**
     * @dev Sets the address of the MetaAggregatorSwap contract.
     * @param _metaAggregatorSwap The address of the MetaAggregatorSwap contract.
     */
    constructor(address _metaAggregatorSwap) {
         if(_metaAggregatorSwap == address(0)) {
            revert InvalidMetaAggregatorAddress();
        }
        MetaAggregatorSwap = IMetaAggregatorSwapContract(_metaAggregatorSwap);
    }

    /**
     * @dev Swaps tokens using the MetaAggregatorSwap contract.
     * @param tokenIn The input token (ERC20).
     * @param tokenOut The output token (ERC20).
     * @param aggregator The address of the aggregator to perform the swap.
     * @param swapData The data required for the swap.
     * @param amountIn The amount of tokenIn to swap.
     * @param minAmountOut The minimum amount of tokenOut expected.
     * @param receiver The address to receive the output tokens.
     * @param isDelegate Whether to use delegatecall for the swap.
     * @notice This function is non-reentrant to prevent reentrancy attacks.
     */
    function swap(
        IERC20 tokenIn,
        IERC20 tokenOut,
        address aggregator,
        bytes calldata swapData,
        uint256 amountIn,
        uint256 minAmountOut,
        address receiver,
        bool isDelegate
    ) external nonReentrant {
        // Check if the input token is the native token (ETH)
        if (address(tokenIn) == nativeToken) {
            revert CannotSwapETH();
        }

        TransferHelper.safeTransferFrom(address(tokenIn), msg.sender, address(MetaAggregatorSwap), amountIn);

        MetaAggregatorSwap.swapERC20(
            tokenIn,
            tokenOut,
            aggregator,
            swapData,
            amountIn,
            minAmountOut,
            receiver,
            isDelegate
        );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.0;

// Helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    // Custom errors
    error ApprovalFailed(address token, address to, uint256 value);
    error TransferFailed(address token, address to, uint256 value);
    error TransferFromFailed(address token, address from, address to, uint256 value);
    error ETHTransferFailed(address to, uint256 value);

    /**
     * @dev Safely approves a token for spending.
     * @param token The address of the token contract.
     * @param to The address to approve.
     * @param value The amount to approve.
     */
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        if (!success || (data.length != 0 && !abi.decode(data, (bool)))) {
            revert ApprovalFailed(token, to, value);
        }
    }

    /**
     * @dev Safely transfers tokens.
     * @param token The address of the token contract.
     * @param to The address to transfer to.
     * @param value The amount to transfer.
     */
    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        if (!success || (data.length != 0 && !abi.decode(data, (bool)))) {
            revert TransferFailed(token, to, value);
        }
    }

    /**
     * @dev Safely transfers tokens from one address to another.
     * @param token The address of the token contract.
     * @param from The address to transfer from.
     * @param to The address to transfer to.
     * @param value The amount to transfer.
     */
    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        if (!success || (data.length != 0 && !abi.decode(data, (bool)))) {
            revert TransferFromFailed(token, from, to, value);
        }
    }
}

{
  "compilationTarget": {
    "contracts/MetaAggregatorManager.sol": "MetaAggregatorManager"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 125
  },
  "remappings": []
}