Web3.js usage example

The web3.js library can be used to interact with the EVM+. In this example, we are retrieving the developerStatus of the EVM contract.

This will validate wether the provided address has the developer status enabled or not. If you wish to learn more about the development accounts, you can read up about them.

In order to be able to use the web3.js library to interact with the predeployed smart contract, we need to add it as well as the precompiled smart contracts to the projects:

yarn --dev web3 @acala-network/contracts

The following example imports the web3.js library and instantiates the connection to the RPC node of the network. It also utilizes the ADDRESS utility of @acala-network/contracts dependency and the precompiled EVM smart contract. We instantiate, call it using the web3.js library and output the result:

const Web3 = require("web3");
const web3 = new Web3("https://eth-rpc-tc9.aca-staging.network");
const { EVM } = require("@acala-network/contracts/utils/Address");
const EVMContract = require("@acala-network/contracts/build/contracts/EVM.json");

const instance = new web3.eth.Contract(EVMContract.abi, EVM);
const address = '0xC9CB0Bd811343Dbf6B9f61704d736dCD1975a7cE'; // is dev
// const address = '0x869e7ed360498A21da9c7EdDFc15FB98Bd1Bf607'; // is not dev

instance.methods.developerStatus(address).call(function (err, res) {
  if (err) {
    console.log("An error occured", err);
    return;
  }
  console.log("The developerStatus is: ", res);
});