abi的编码和解码过程：

1、abi.encode

2、abi.decode

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.30;

contract abiDecode {

    struct MyStruct{
        string name;
        uint[2] nums;
    }

    function encode(uint x, address addr, uint[] calldata arr, MyStruct calldata myStruct) external pure returns(bytes memory){
        return abi.encode(x,addr,arr,myStruct);
    }

    function decode(bytes calldata data) external pure returns(
        uint x, address addr, uint[] memory arr, MyStruct memory myStruct
    ){
        (x,addr,arr,myStruct) = abi.decode(data, (uint, address, uint[], MyStruct));
    }
}