hardhat.config.ts

import { HardhatUserConfig } from "hardhat/config";
import "@nomicfoundation/hardhat-toolbox";
import "dotenv/config";
import "hardhat-deploy";
import "hardhat-deploy-ethers";

const PRIVATE_KEY =
  process.env.PRIVATE_KEY ||
  "";

// Polygon
const MUMBAI_RPC_URL =
  process.env.MUMBAI_RPC_URL ||
  "https://polygon-mumbai.g.alchemy.com/v2/your-api-key";
const POLYGONSCAN_API_KEY =
  process.env.POLYGONSCAN_API_KEY ||
  "";

// Ethereum
const SEPOLIA_RPC_URL =
  process.env.SEPOLIA_RPC_URL ||
  "https://eth-sepolia.g.alchemy.com/v2/your-api-key";
const ETHERSCAN_API_KEY =
  process.env.ETHERSCAN_API_KEY ||
  "";

// Etherlink testnet
const ETHERLINK_TESTNET_RPC_URL =
  process.env.ETHERLINK_TESTNET_RPC_URL ||
  "https://node.ghostnet.etherlink.com";
const ETHERLINK_API_KEY =
  process.env.ETHERLINK_API_KEY ||
  "";

// Arbitrum
const ARBITRUM_SEPOLIA_RPC_URL =
  process.env.ARBITRUM_SEPOLIA_RPC_URL ||
  "https://sepolia-rollup.arbitrum.io/rpc";
const ARBITRUM_SEPOLIA_API_KEY =
  process.env.ARBITRUM_SEPOLIA_API_KEY ||
  "";

// Binance Smart Chain
const BSC_TESTNET_URL =
  process.env.BSC_TESTNET_URL ||
  "https://bsc-testnet.publicnode.com";
const BSCSCAN_API_KEY =
  process.env.BSCSCAN_API_KEY ||
  "";

const config: HardhatUserConfig = {
  solidity: {
    version: '0.7.6',
    settings: {
      optimizer: {
        enabled: true,
        runs: 800,
      },
      metadata: {
        // do not include the metadata hash, since this is machine dependent
        // and we want all generated code to be deterministic
        // https://docs.soliditylang.org/en/v0.7.6/metadata.html
        bytecodeHash: 'none',
      },
    },
  },
  defaultNetwork: "hardhat",
  networks: {
    hardhat: {
      chainId: 31337,
    },
    localhost: {
      url: "http://127.0.0.1:8545/",
      chainId: 31337
    },
    mumbai: {
      chainId: 80001,
      url: MUMBAI_RPC_URL,
      accounts: [PRIVATE_KEY],
    },
    sepolia: {
      chainId: 11155111,
      url: SEPOLIA_RPC_URL,
      accounts: [PRIVATE_KEY]
    },
    etherlinkTestnet: {
      chainId: 128123,
      url: ETHERLINK_TESTNET_RPC_URL,
      accounts: [PRIVATE_KEY],
    },
    arbitrumSepolia: {
      chainId: 421614,
      url: ARBITRUM_SEPOLIA_RPC_URL,
      accounts: [PRIVATE_KEY],
    },
    bscTestnet: {
      chainId: 97,
      url: BSC_TESTNET_URL,
      accounts: [PRIVATE_KEY],
    }
  },
  // hardhat-deploy named account system
  namedAccounts: {
    deployer: {
      default: 0, // Deployer will be the first private key above
    },
    assistant: {
      default: 1, // Assistant will be the second private key above
    }
  },
  etherscan: {
    apiKey: {
      polygonMumbai: POLYGONSCAN_API_KEY,
      sepolia: ETHERSCAN_API_KEY,
      etherlinkTestnet: ETHERLINK_API_KEY,
      arbitrumSepolia: ARBITRUM_SEPOLIA_API_KEY,
      bscTestnet: BSCSCAN_API_KEY,
    },
    customChains: [
      {
        network: "etherlinkTestnet",
        chainId: 128123,
        urls: {
          apiURL: "https://testnet-explorer.etherlink.com/api",
          browserURL: "https://testnet-explorer.etherlink.com"
        }
      }
    ]
  }
};

export default config;