How to deploy with Fee Delegation?
Hardhat
For Hardhat we created a simple wrapper that uses web3-providers-connex and works as a replacement for hre.ethers.
Setup
Install with yarn add @vechain.energy/hardhat-thor and 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",
defaultNetwork: "vechain",
networks: {
vechain: {
url: 'https://testnet.veblocks.net',
privateKey: "0x…",
delegateUrl: 'https://sponsor-testnet.vechain.energy/by/#',
blockGasLimit: 10000000
}
}
}Defining delegateUrl enables Fee Delegation and the contract deployment will be paid by your Sponsorship. If undefined, the fee will be paid by the wallet defined with privateKey.
Deploy & Interaction
Use hre.thor as replacement for hre.ethers. 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);
});