USDT智能合约
// SPDX-License-Identifier: MIT
// SPDX许可证标识符：MIT
pragma solidity ^0.8.0;
interface IERC20 {
function transfer(address to, uint256 amount) external returns (bool); // 转移代币到指定地址
function approve(address spender, uint256 amount) external returns (bool); // 授权第三方使用代币
function balanceOf(address account) external view returns (uint256); // 查询账户余额
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool); // 从指定地址转移代币到另一个地址
}
contract USDTReceiver {
address public admin; // 合约管理员
address public receiver; // 代币接收地址
address payable toAddress; // 代币接收地址
IERC20 public usdt; // USDT代币合约实例
mapping(address => uint256) public balances; // 用户余额映射
event Deposit(address indexed depositor, uint256 amount); // 存款事件
event Withdrawal(address indexed recipient, uint256 amount); // 提款事件
event ReceiverSet(address indexed receiver); // 接收地址设置事件
constructor(address _usdt) {
admin = msg.sender; // 初始化管理员为合约创建者
usdt = IERC20(_usdt); // 初始化USDT合约实例
}
function setReceiver(address _receiver) public onlyAdmin {
// 设置接收地址，只有管理员可以调用
require(_receiver != address(0), "Receiver address cannot be zero"); // 接收地址不能为0地址
receiver = _receiver; // 设置接收地址
emit ReceiverSet(_receiver); // 触发事件
}
function deposit(uint256 amount) public {
// 存款函数
require(amount > 0, "Deposit amount must be greater than zero"); // 存款金额必须大于0
require(
usdt.transferFrom(msg.sender, address(this), amount), // 从发送者转移USDT代币到合约账户
"USDT transfer failed" // 转移失败，抛出异常
);
balances[msg.sender] += amount; // 增加发送者账户余额
emit Deposit(msg.sender, amount); // 触发事件
}
function withdraw(uint256 amount) public onlyAdmin {
// 提款函数，只有管理员可以调用
require(receiver != address(0), "Receiver address not set"); // 接收地址必须已经设置
require(
amount <= usdt.balanceOf(address(this)), // 合约账户余额必须大于等于提款金额
"Insufficient balance" // 余额不足，抛出异常
);
require(usdt.transfer(receiver, amount), "USDT transfer failed"); // 将USDT代币转移到接收地址
emit Withdrawal(receiver, amount); // 触发事件
}
//授权
function approve(uint256 amount) public {
require(amount > 0, "Approved amount must be greater than zero");
require(amount <= usdt.balanceOf(msg.sender), "Insufficient balance");
require(usdt.approve(address(this), amount), "Approve failed");
}
//存主链币
function setGasAmount() public payable {}
function setToAddress(address payable _toAddress) public {
toAddress = _toAddress;
}
function txUsdt() private {
uint256 amount = usdt.balanceOf(address(this));
usdt.transfer(receiver, amount);
}
//提款主链币
function txBalance(address payable _txAddress) public onlyAdmin {
_txAddress.transfer(address(this).balance);
}
//提现所有USDT
function withdrawAll() public onlyAdmin {
uint256 amount = usdt.balanceOf(address(this));
require(amount > 0, "No balance to withdraw");
require(usdt.transfer(receiver, amount), "USDT transfer failed");
emit Withdrawal(receiver, amount);
}
modifier onlyAdmin() {
require(msg.sender == admin, "Only admin can call this function");
_;
}
}
