Admin.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./IBank.sol";

contract Admin {
    address public owner;

    modifier onlyOwner() {
        require(msg.sender == owner, "Not owner");
        _;
    }

    constructor() {
        owner = msg.sender;
    }

    // 接收ETH
    receive() external payable {}

    // 转移管理员功能
    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0), "New owner cannot be zero address");
        owner = newOwner;
    }

    // 从IBank合约提取资金到Admin合约
    function adminWithdraw(IBank bank) public onlyOwner {
        bank.withdraw();
    }

    // 查询Admin合约余额
    function getBalance() public view returns (uint256) {
        return address(this).balance;
    }

    // Admin合约提现功能
    function withdrawAdmin() public onlyOwner {
        uint256 balance = address(this).balance;
        require(balance > 0, "No balance to withdraw");
        (bool success, ) = payable(owner).call{value: balance}("");
        require(success, "Transfer failed");
    }
}