hardhat-vechain

A package extending the Hardhat environment with a vechain field. The field contains a Hardhat EthereumProvider enabling requests via Connex.

Usage

• Modify hardhat.config.js to include require("@vechain/hardhat-vechain")
• Configure networks to include a vechain configuration

Note: A solo Thor instance should be running for the below configurations to work

Sample hardhat.config.js

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

module.exports = {
    solidity: {
        version: "0.8.17",
    },
    networks: {
        vechain: {
            url: VECHAIN_URL_SOLO
        },
    }
};

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}.

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

module.exports = {
    solidity: {
        version: "0.8.17",
    },
    networks: {
        vechain: {
            url: VECHAIN_URL_SOLO,
            delegate: {
                url: "${feeDelegationServiceUrl}",
                signer: "${optionalSigner}"
            }
        },
    }
};

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,
            delegate: {
                url: "${feeDelegationServiceUrl}",
                signer: "${optionalSigner}"
            }
        },
        vechain_mainnet: {
            url: "https://mainnet.veblocks.net",
        },
    }
};

Testing

• Access the provider using the globally available vechain

describe("vechain", function() {
    it("should be able to send requests", async function () {
        const accounts = await vechain.request({ method: "eth_accounts" });
        assert.equals(accounts[0], "0xf077b491b355e64048ce21e3a6fc4751eeea77fa");
    });
});