A minimal demonstration of creating an empty collection and minting an empty token on Unique using hardhat.

hardhat.config.ts

import { HardhatUserConfig, task } from "hardhat/config"
import "@typechain/hardhat"

import * as dotenv from "dotenv"

dotenv.config()

const config: HardhatUserConfig = {
  solidity: "0.8.21",
  defaultNetwork: "localhost",
  networks: {
    localhost: { url: "http://localhost:8545", },
    opal: {
      url: "https://rpc-opal.unique.network",
      accounts: process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : [],
    },
  },
}

export default config

hardhat_demo.ts

import {ethers} from 'hardhat'
import {CollectionHelpersFactory, UniqueNFTFactory, parseEthersV5TxReceipt} from '@unique-nft/solidity-interfaces'
import {Address} from '@unique-nft/utils'

async function main() {
  // network is already provided by hardhat
  const provider = ethers.provider
  console.log(`Network is:`, await provider.getNetwork())

  //////////////////////////////////////////////////////
  // initialize wallet and check that balance is enough
  //////////////////////////////////////////////////////
  const wallet = (await ethers.getSigners())[0]
  if (!wallet) {
    throw new Error(`wallet is not initialized, please set it up in hardhat.config.ts`)
  }
  const balance = parseFloat(ethers.utils.formatEther(await wallet.getBalance()))
  console.log(`Wallet address is ${wallet.address}, balance is ${balance.toFixed(2)} OPL/QTZ/UNQ`)
  if (balance < 3) {
    throw new Error(`balance should be at least 3 OPL/QTZ/UNQ`)
  }

  const collectionHelpers = await CollectionHelpersFactory(wallet, ethers)

  const gasLimit= 1000000
  const gasPrice = await provider.getGasPrice()


  //////////////////////////////////////////////////////
  // create collection
  //////////////////////////////////////////////////////
  const collectionCreationTx = await (await collectionHelpers.createNFTCollection(
    'My first collection',
    'My first collection description',
    'MY',
    {
      value: await collectionHelpers.collectionCreationFee(),
      gasLimit,
      gasPrice,
    }
  )).wait()

  // yes, CollectionCreated.collectionId, but actually it returns address, not collection id
  const collectionAddress = parseEthersV5TxReceipt(collectionCreationTx).events.CollectionCreated.collectionId
  const collectionId = Address.collection.addressToId(collectionAddress)

  console.log(`Created collection ${collectionId}, address is ${collectionAddress}`)

  //////////////////////////////////////////////////////
  // mint token
  //////////////////////////////////////////////////////
  const collection = await UniqueNFTFactory(collectionAddress, wallet, ethers)

  const mintTx = await (await collection.mint(
    wallet.address,
    {
      gasLimit,
      gasPrice,
    }
  )).wait()
  const tokenId = parseEthersV5TxReceipt(mintTx).events.Transfer.tokenId

  console.log(`Minted token #${tokenId} (${collectionId}/${tokenId}) to ${wallet.address}`)
}

main().catch((error) => {
  console.error(error)
  process.exitCode = 1
})