写一个合约

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.0.0
pragma solidity ^0.8.20;import "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/CountersUpgradeable.sol";contract MyContract is Initializable, PausableUpgradeable, OwnableUpgradeable, UUPSUpgradeable {using CountersUpgradeable for CountersUpgradeable.Counter;CountersUpgradeable.Counter private changeId;uint public number;// string public name;/// @custom:oz-upgrades-unsafe-allow constructorconstructor() {_disableInitializers();}function initialize(address initialOwner) initializer public {__Pausable_init();__Ownable_init(initialOwner);__UUPSUpgradeable_init();}function pause() public onlyOwner {_pause();}function unpause() public onlyOwner {_unpause();}function updateNumber(uint _number) public returns (uint, uint) {number = _number;changeId.increment();uint id = changeId.current();return (number, id);}//  function addName(string memory _name) public returns (string memory){//     name = _name;//     return name;// }function _authorizeUpgrade(address newImplementation)internalonlyOwneroverride{}
}

1. 使用代理部署 并添加拥有者

2. 没有name number为10

3. 使用代理升级部署 填写上面代理的合约地址

4. 合约地址没有变，但是添加了name，并且保存了number的属性值