interact.ts

import { Deployer } from "@matterlabs/hardhat-zksync-toolbox";
import * as dotenv from "dotenv";
import { HardhatRuntimeEnvironment } from "hardhat/types";
import { ContractFactory, Wallet } from "zksync-web3";

// env vars from the .env file.
dotenv.config();

const interact = async (hre: HardhatRuntimeEnvironment) => {
  console.log(`Running example interact script for the Greeter contract`);
  console.log();

  const contractAddress = "";
  if (!contractAddress) {
    throw new Error(`Contract address not provided. Use the contractAddress variable to set it.`);
  }

  // private key from env var
  const privateKey = (hre.network.name === "zkSyncLocal") ?
    process.env.LOCAL_TESTNET_RICH_WALLET_PRIVATE_KEY : process.env.PRIVATE_KEY;
  if (!privateKey) {
    throw new Error(`Please set your PRIVATE_KEY in the '.env' file. Use the '.env.example' file as an example.`);
  }

  // artifact loading
  const wallet = new Wallet(privateKey);
  const deployer = new Deployer(hre, wallet);
  const artifact = await deployer.loadArtifact("Greeter");

  // contract loading
  console.log(`Attaching to ${artifact.contractName} contract (${contractAddress})...`);
  const greeterContractFactory = new ContractFactory(artifact.abi, artifact.bytecode, deployer.zkWallet);
  const greeterContract = greeterContractFactory.attach(contractAddress);
  console.log(`Attached to ${artifact.contractName} contract.`);
  console.log();

  // setGreeting function call (WRITE)
  console.log("Setting a new greeting with the setGreeting function...");
  const greeting = "Hello there!";
  const setGreetingHandle = await greeterContract.setGreeting(greeting);
  await setGreetingHandle.wait();
  console.log("New greeting set.");
  console.log();

  // greet function call (READ)
  console.log(`Calling the greet function...`)
  const greetingFromContract = await greeterContract.greet();
  console.log(`Function responded with: ${greetingFromContract}`);
  console.log();

  // setGreeting function call (WRITE)
  console.log("Setting a new greeting with the setGreeting function...");
  const newGreeting = "General Kenobi!";
  const setNewGreetingHandle = await greeterContract.setGreeting(newGreeting);
  await setNewGreetingHandle.wait();
  console.log("New greeting set.");
  console.log();

  // greet function call (READ)
  console.log(`Calling the greet function...`);
  const newGreetingFromContract = await greeterContract.greet();
  console.log(`Function responded with: ${newGreetingFromContract}`);
  console.log();
}

export default interact;