// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
contract ABIEncode {
// ABI(Application Binary Interface): 应用二进制接口
// 编码函数:encode, encodePacked, encodeWithSigature, encodeWithSelector
// 解码函数: decode
uint x = 10;
address addr = 0x7A58c0Be72BE218B41C608b7Fe7C5bB630736C71;
string name = "0xAA";
uint[2] array = [5,6];
function encode() public view returns(bytes memory result){
result = abi.encode(x, addr, name, array);
}
function encodePacked() public view returns(bytes memory result) {
result = abi.encodePacked(x, addr, name, array);
}
function encodeWithSignature() public view returns(bytes memory result) {
result = abi.encodeWithSignature("foo(uint256,address,string,uint256[2])", x, addr, name, array);
}
function encodeWithSelector() public view returns(bytes memory result) {
result = abi.encodeWithSelector(bytes4(keccak256("foo(uint256,address,string,uint256[2])")), x, addr, name, array);
}
function decode(bytes memory data) public pure returns(uint dx, address daddr, string memory dname, uint[2] memory darray) {
(dx, daddr, dname, darray) = abi.decode(data, (uint, address, string, uint[2]));
}
}