Setup a project with Hardhat

Setup Project

Setup example project using the Hardhat Documentation at: https://hardhat.org/getting-started/ (opens in a new tab)

For testing purpose the "basic sample project" was chosen.

Enable vechain thor

Install our hardhat-thor plugin.

yarn add @vechain.energy/hardhat-thor

Enable it in hardhat.config.js and configure network. Here is a full working config file:

require("@nomiclabs/hardhat-waffle");
require('@vechain.energy/hardhat-thor')
 
module.exports = {
  solidity: "0.8.4",
  networks: {
    vechain: {
      url: 'https://testnet.veblocks.net',
      privateKey: "0x80b97e2ecfab8b1c78100c418328e8a88624e3d19928ec791a8a51cdcf01f16f",
      delegateUrl: 'https://sponsor-testnet.vechain.energy/by/90'
    }
  }
};

Defining delegateUrl enables Fee Delegation and the contract deployment will be paid by a Sponsorship from testnet.vechain.energy (opens in a new tab).

If undefined, the fee will be paid by the wallet defined with privateKey.

Deploy & Interaction

Modify the scripts/sample-script.js to use hre.thor instead of hre.ethers. Here is a full working example:

const hre = require("hardhat");
 
async function main() {
  await hre.run('compile');
 
  const Greeter = await hre.thor.getContractFactory("Greeter");
  const greeter = await Greeter.deploy("Hello, VeChain!");
 
  await greeter.deployed();
  console.log("Greeter deployed to:", greeter.address);
 
  const deployedGreeter = await hre.thor.getContractAt('Greeter', greeter.address)
 
  const greeting = await deployedGreeter.greet()
  console.log("Greeter responded with:", greeting)
}
 
main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });

Notes

The example project:
https://gitlab.com/vechain.energy/examples/hardhat-deployment (opens in a new tab)

hardhat-thor plugin:
https://www.npmjs.com/package/@vechain.energy/hardhat-thor (opens in a new tab)

Multi Task Atomic Transactions Openzeppelin