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// SPDX-License-Identifier: Apache 2
pragma solidity ^0.8.19;

import "./interfaces/IVAAv1ReceiveWithGasDropOff.sol";
import "example-messaging-executor/evm/src/interfaces/IVaaV1Receiver.sol";

string constant vaaV1ReceiveWithGasDropOffVersion = "VAAv1ReceiveWithGasDropOff-0.0.1";

/// @title VAAv1ReceiveWithGasDropOff
/// @author Executor Project Contributors.
/// @notice The VAAv1ReceiveWithGasDropOff contract is a shim contract that receives a V1 VAA and drops off gas at the specified address.
contract VAAv1ReceiveWithGasDropOff is IVAAv1ReceiveWithGasDropOff {
    string public constant VERSION = vaaV1ReceiveWithGasDropOffVersion;

    // ==================== External Interface ===============================================

    /// @inheritdoc IVAAv1ReceiveWithGasDropOff
    function receiveMessage(address contractAddr, bytes calldata message, address payeeAddress, uint256 dropOffValue)
        external
        payable
    {
        if (msg.value < dropOffValue) {
            revert InvalidMsgValue(msg.value, dropOffValue);
        }

        uint256 value = msg.value - dropOffValue;
        IVaaV1Receiver(contractAddr).executeVAAv1{value: value}(message);

        if (dropOffValue > 0) {
            (bool dropOffSuccessful,) = payable(payeeAddress).call{value: dropOffValue}("");
            if (!dropOffSuccessful) {
                revert DropOffFailed(payeeAddress, dropOffValue);
            }
        }
    }
}

// SPDX-License-Identifier: Apache 2
pragma solidity ^0.8.19;

interface IVAAv1ReceiveWithGasDropOff {
    error InvalidMsgValue(uint256 msgValue, uint256 dropOffValue);
    error DropOffFailed(address, uint256);

    /// @notice Receive a message on the specified contract and drops off the specified amount of gas.
    /// @param contractAddr The contract to receive message.
    /// @param message The message to be received.
    /// @param payeeAddress The address to receive the gas drop off.
    /// @param dropOffValue The amount of gas to be dropped off.
    function receiveMessage(address contractAddr, bytes calldata message, address payeeAddress, uint256 dropOffValue)
        external
        payable;
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

/// @notice Any contract that wishes to receive V1 VAAs from the executor needs to implement `IVaaV1Receiver`.
interface IVaaV1Receiver {
    /// @notice Receive an attested message from the executor relayer.
    /// @param msg The attested message payload.
    function executeVAAv1(bytes memory msg) external payable;
}

{
  "remappings": [
    "ds-test/=lib/openzeppelin-contracts/lib/forge-std/lib/ds-test/src/",
    "example-messaging-executor/=lib/example-messaging-executor/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "viaIR": true,
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"DropOffFailed","type":"error"},{"inputs":[{"internalType":"uint256","name":"msgValue","type":"uint256"},{"internalType":"uint256","name":"dropOffValue","type":"uint256"}],"name":"InvalidMsgValue","type":"error"},{"inputs":[],"name":"VERSION","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"contractAddr","type":"address"},{"internalType":"bytes","name":"message","type":"bytes"},{"internalType":"address","name":"payeeAddress","type":"address"},{"internalType":"uint256","name":"dropOffValue","type":"uint256"}],"name":"receiveMessage","outputs":[],"stateMutability":"payable","type":"function"}]

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