Core JavaScript library for the NewOS
Last updated 5 months ago by xiawu_zeuux .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ cnpm install @newos/upgrades 
SYNC missed versions from official npm registry.

OpenZeppelin SDK JavaScript Library (@openzeppelin/upgrades)

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JavaScript library for the OpenZeppelin smart contract platform.

OpenZeppelin SDK is a platform to develop, deploy and operate smart contract projects on Ethereum and every other EVM and eWASM-powered blockchain.

This is the repository for the OpenZeppelin SDK JavaScript library. It is mainly used by the openzeppelin-sdk command-line interface, which is the recommended way to use the OpenZeppelin SDK; but this library can also be used directly to operate projects when a programmatic interface is preferred or more flexibility and lower-level access is required.


First, install Node.js and npm. Then, install the OpenZeppelin SDK JavaScript Library running:

npm install @openzeppelin/upgrades


Suppose there is a contract called MyContractV0 in the file contracts/MyContractV0.sol, already compiled to build/contracts/MyContractV0.json, and that there is a development blockchain network running locally in port 8545.

Open a Node.js console:

const Web3 = require('web3');
const { Contracts, ProxyAdminProject, ZWeb3 } = require('@openzeppelin/upgrades')

async function main() {
  // Create web3 provider and initialize OpenZeppelin upgrades
  const web3 = new Web3('http://localhost:8545');

  // Create an OpenZeppelin project
  const [from] = await ZWeb3.eth.getAccounts();
  const project = new ProxyAdminProject('MyProject', null, null, { from, gas: 1e6, gasPrice: 1e9 });

  // Deploy an instance of MyContractV0
  console.log('Creating an upgradeable instance of v0...');
  const MyContractV0 = Contracts.getFromLocal('MyContractV0');
  const instance = await project.createProxy(MyContractV0, { initArgs: [42] });
  const address = instance.options.address;
  console.log(`Contract created at ${address}`);

  // And check its initial value
  const initialValue = await instance.methods.value().call();
  console.log(`Initial value is ${initialValue.toString()}\n`);

  // Upgrade it to V1
  console.log('Upgrading to v1...');
  const MyContractV1 = Contracts.getFromLocal('MyContractV1');
  const instanceV1 = await project.upgradeProxy(instance.options.address, MyContractV1);
  console.log(`Contract upgraded at ${instanceV1.options.address}`);

  // And check its new `add` method, note that we use instanceV1 since V0 has no `add` in its ABI
  await instanceV1.methods.add(10).send({ from, gas: 1e5, gasPrice: 1e9 });
  const newValue = await instance.methods.value().call();
  console.log(`Updated value is ${newValue.toString()}\n`);



If you find a security issue, please contact us at security@openzeppelin.com. We give rewards for reported issues, according to impact and severity.





To contribute, join our community channel on Telegram where you can talk to all the OpenZeppelin developers, contributors, partners and users.

You can also follow the recent developments of the project in our blog and Twitter account.


MIT © OpenZeppelin

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