hardhat.config.ts

import fs from 'fs';
import 'hardhat-gas-reporter';
import '@nomiclabs/hardhat-ethers';
import '@nomiclabs/hardhat-waffle';
import '@nomiclabs/hardhat-etherscan';
import { contracts, deploy } from './scripts/deploy';
import { HardhatUserConfig, task } from 'hardhat/config';

const paths = {
  infuraKey: '.infura.key',
  etherscanKey: '.etherscan.key',
  mnemonics: '.mnemonics.json',
};

const mnemonics = fs.existsSync(paths.mnemonics) ? JSON.parse(fs.readFileSync(paths.mnemonics).toString()) : undefined;
const infuraKey = fs.existsSync(paths.infuraKey) ? fs.readFileSync(paths.infuraKey).toString().trim() : undefined;
const etherscanKey = fs.existsSync(paths.etherscanKey) ? fs.readFileSync(paths.etherscanKey).toString().trim() : undefined;

const config: HardhatUserConfig = {
  solidity: {
    compilers: [
      {
        version: '0.8.10',
        settings: {
          optimizer: {
            enabled: true,
            runs: 1000,
            details: {
              yul: true,
              cse: true,
              deduplicate: true,
              orderLiterals: true,
              constantOptimizer: true,
            }
          },
        }
      },
    ],
  },
};

if (mnemonics && infuraKey) {
  config.networks = {
    rinkeby: {
      accounts: {
        count: 1,
        mnemonic: mnemonics.testnet,
      },
      url: `https://rinkeby.infura.io/v3/${infuraKey}`,
    },
    mainnet: {
      accounts: {
        count: 1,
        mnemonic: mnemonics.mainnet,
      },
      url: `https://mainnet.infura.io/v3/${infuraKey}`,
    },
  };
}

if (etherscanKey) {
  config.etherscan = {
    apiKey: etherscanKey,
  };
}

task('accounts', 'Prints all accounts', async (_, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (let i = 0; i < accounts.length; i += 1) {
    console.log(`${i + 1}: ${await accounts[i].getAddress()}`);
  }
});

task('deploy', 'Deploy the contracts', async (_, hre) => {
  await deploy(hre);
});

task('deploy-verify', 'Deploy the contracts and verify them on Etherscan', async (_, hre) => {
  const addresses = await deploy(hre);

  // Don't verify the ERC20 contract
  if (contracts.length === 3) {
    contracts.pop();
  }

  console.log(`Verifying contracts on Etherscan contracts: ${Object.values(contracts).join(', ')}`);
  console.log();

  for (let i = 0; i < contracts.length; i += 1) {
    await hre.run('verify', { contractName: contracts[i], address: addresses[i] });
  }
});

task('metamask-register', 'Generate method names and their hashes for the MetaMask registration', async (_, hre) => {
  console.log();
  console.log();

  for (const contract of contracts) {
    if (contract === 'TestERC20') {
      continue;
    }

    const factory = await hre.ethers.getContractFactory(contract);

    console.log(`Contract ${contract}`);
    console.log();

    for (const methodName of Object.keys(factory.interface.functions)) {
      // Do not print view functions for which no MetaMask popup approval is needed
      if (factory.interface.functions[methodName].stateMutability !== 'view') {
        console.log(`  Method name: ${methodName}`);
        console.log(`  Trimmed hash: ${hre.ethers.utils.solidityKeccak256(['string'], [methodName]).substring(0, 10)}`);
        console.log();
      }
    }

    console.log();
  }
});

export default config;