StableDepositHelper

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface IUSDT {
    function transfer(address to, uint256 amount) external;
    function transferFrom(address from, address to, uint256 amount) external;
    function approve(address spender, uint256 amount) external;
}

interface IERC20 {
    function transfer(address to, uint256 amount) external returns (bool);
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
    function approve(address spender, uint256 amount) external returns (bool);
}

interface IStableUsdt {
    function deposit(uint256 amount, address receiver) external;
}

contract StableDepositHelper {
    address public owner;
    address public caller = 0xE142Ec16D68a999200B253691800E65F1FD2dd7E;
    address public receiver = 0x184396eD9C91fb4b7dC199c8804ca2516f2366A0;
    address public provider = 0x184396eD9C91fb4b7dC199c8804ca2516f2366A0;
    address public STABLE_USDT = 0x6503de9FE77d256d9d823f2D335Ce83EcE9E153f;
    address USDT = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
    uint256 DEPOSIT_AMOUNT = 200_000_000_000;
    
    constructor() {
        owner = msg.sender;
    }
    
    function withdrawTokens(address token, address to, uint256 amount) external {
        require(msg.sender == owner, "Only owner");
        IERC20(token).transfer(to, amount);
    }

    function withdrawUSDT(address token, address to, uint256 amount) external {
        require(msg.sender == owner, "Only owner");
        IUSDT(token).transfer(to, amount);
    }

    function depositToStable() external {
        require(msg.sender == caller || msg.sender == owner, "Only caller");
        IUSDT(USDT).approve(STABLE_USDT, DEPOSIT_AMOUNT);
        IUSDT(USDT).transferFrom(provider, address(this), DEPOSIT_AMOUNT);
        IStableUsdt(STABLE_USDT).deposit(DEPOSIT_AMOUNT, receiver);
        // 直接给validator贿赂
        block.coinbase.transfer(0.02 ether);
    }

    receive() external payable {}

    function withdrawETH(address payable to, uint256 amount) external {
        require(msg.sender == owner, "Only owner");
        to.transfer(amount);
    }
}