hardhat.config.ts

/**
 * Copyright 2026 Circle Internet Group, Inc.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

import { HardhatUserConfig } from "hardhat/config";
import "@nomicfoundation/hardhat-toolbox";
import * as dotenv from "dotenv";

dotenv.config({ path: ".env.local" });

const accounts: string[] = (() => {
  let key = process.env.PRIVATE_KEY?.trim();
  if (!key) return [];
  if (key.startsWith("0x")) key = key.slice(2);
  if (key.length !== 64) return [];
  return [`0x${key}`];
})();

const config: HardhatUserConfig = {
  solidity: {
    version: "0.8.17",
    settings: {
      optimizer: {
        enabled: true,
        runs: 1000000,
      },
    },
  },
  networks: {
    arcTestnet: {
      url: process.env.NEXT_PUBLIC_ALCHEMY_RPC_URL || "https://rpc.testnet.arc.network",
      accounts,
      chainId: 5042002,
    },
  },
  etherscan: {
    apiKey: {
      arcTestnet: "empty",
    },
    customChains: [
      {
        network: "arcTestnet",
        chainId: 5042002,
        urls: {
          apiURL: "https://testnet.arcscan.app/api",
          browserURL: "https://testnet.arcscan.app",
        },
      },
    ],
  },
};

export default config;