Sample Hardhat Project

This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a script that deploys that contract.

Sample hardhat.config.js with fee delegation

Fee delegation can be configured by providing optional delegate config which has required url and optional signer field. Url needs to point to delegation a valid delegation service, for example https://sponsor-testnet.vechain.energy/by/${projectId}.

module.exports = {
    solidity: {
        version: "0.8.17",
    },
    networks: {
        vechain: {
            url: "https://testnet.veblocks.net/",
            delegate: {
                url: "${feeDelegationServiceUrl}",
                signer: "${optionalSigner}"
            }
        },
    }
};

Clauses support

Vechain Thor network supports sending multiple clauses as part of one transaction. Clauses are then executed atomically on a chain. Hardhat plugin supports Vechain tx construction with multiple clauses. Example code:

const clauseBuilder = new ClausesBuilder(baseContract);
const tx = await clauseBuilder.withClause({
    args: [1],
    abi: JSON.stringify([{ type: 'function', name: 'method1'}] ),
    method: 'method1'
}).withClause({
    args: [2],
    abi: JSON.stringify([{ type: 'function', name: 'method2'}] ),
    method: 'method2'
}).send()

Multi network support sample hardhat.config.js

Multiple network can also be configured to simplify testing and deployments. Networks which are targeting VechainThor nodes should have vechain as part of the network name (vechain, vechain_testnet, vechainNode are all valid). Network names without this requirement won't be preprocessed by the plugin and it is not expected to function properly with Thor network. Sample configuration:

const {
  VECHAIN_URL_SOLO
} = require("@vechain/hardhat-vechain");
require("@vechain/hardhat-web3");

module.exports = {
    solidity: {
        version: "0.8.17",
    },
    networks: {
        vechain_solo: {
            url: VECHAIN_URL_SOLO,
        },
        vechain_mainnet: {
            url: "https://mainnet.veblocks.net",
        },
    }
};

Multi network configuration can be tested with:

npx hardhat test --network vechain_solo  

Thor solo node can be started via docker-compose

docker-compose up -d  

Try running some of the following tasks:

npx hardhat help
npx hardhat test --network vechain
REPORT_GAS=true npx hardhat test --network vechain
npx hardhat node
npx hardhat run scripts/deploy.ts --network vechain