ethereum eth transfer

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

contract SendEther {
    address to = 0xDd17d10B2D08E4036aEe485f8d586bD6aDdB8203;

    //将调用者msg.sender的ETH 转到固定的 to 外部地址
    function sendViaTransfer() public payable {
        // This function is no longer recommended for sending Ether.
        payable(to).transfer(msg.value); //contract
    }

    //将调用者msg.sender的ETH 转到 to 外部地址
    function sendViaTransfer1(address payable _to) public payable {
        // This function is no longer recommended for sending Ether.
        _to.transfer(msg.value); //contract
    }
	//给合约转ETH
    function sendViaTransferContract() public payable {
        // This function is no longer recommended for sending Ether.
        payable(address(this)).transfer(msg.value); //contract
    }

    //将合约地址的ETH转账到调用的钱包地址
    function transferTo(uint256 wad) public returns (bool) {
        payable(msg.sender).transfer(wad);
        return true;
    }

    //将合约地址的ETH转账到指定钱包地址
    function transferTo(address payable _to, uint256 wad)
        public
        returns (bool)
    {
        _to.transfer(wad);
        return true;
    }

    function sendViaSend() public payable {
        // Send returns a boolean value indicating success or failure.
        // This function is not recommended for sending Ether.
        bool sent = payable(to).send(msg.value);
        require(sent, "Failed to send Ether");
    }

    //给合约地址与外部地址同时转账 如果在调用此函数时，附带了10Wei，那么就会给account账户转移10Wei，给合约账户转移10Wei
    function transfer3() public payable {
        payable(to).transfer(10);
    }

    //合约接收 Ether 的合约必须至少具有以下功能之一
    // Function to receive Ether. msg.data must be empty
    receive() external payable {}

    // Fallback function is called when msg.data is not empty
    fallback() external payable {}
	
	//查询以太坊余额
    function getBalance() public view returns (uint256) {
        return address(this).balance;
    }
}