truffle-config.js

require('dotenv').config()
const { TruffleProvider } = require('@harmony-js/core')
const account_1_mnemonic = process.env.MNEMONIC
const account_1_private_key = process.env.PRIVATE_KEY
const account_2_mnemonic = process.env.MNEMONIC2
const account_2_private_key = process.env.PRIVATE_KEY2
const testnet_url = process.env.TESTNET_URL
gasLimit = process.env.GAS_LIMIT
gasPrice = process.env.GAS_PRICE

module.exports = {
  networks: {
    testnet: {
      network_id: '2',
      gas: gasLimit,
      gasPrice: gasPrice,
      provider: () => {
        const truffleProvider = new TruffleProvider(
          testnet_url,
          { memonic: account_1_mnemonic },
          { shardID: 0, chainId: 2 },
          { gasLimit: gasLimit, gasPrice: gasPrice},
        );
        const newAcc = truffleProvider.addByPrivateKey(account_1_private_key);
        truffleProvider.setSigner(newAcc);
        return truffleProvider;
      },
    },
    test: {
      network_id: '2',
      gas: gasLimit,
      gasPrice: gasPrice,
      provider: () => {
        const truffleProvider = new TruffleProvider(
          testnet_url,
          { memonic: account_2_mnemonic },
          { shardID: 0, chainId: 2 },
          { gasLimit: gasLimit, gasPrice: gasPrice },
        );
        const newAcc = truffleProvider.addByPrivateKey(account_2_private_key);
        truffleProvider.setSigner(newAcc);
        return truffleProvider;
      },
    },
  },

  // Set default mocha options here, use special reporters etc.
  mocha: {
    // timeout: 100000
  },

  // Configure your compilers
  compilers: {
    solc: {
      version: "^0.5.0",
      settings: {
        optimizer: {
          enabled: true,
          runs: 200
        }
      }
    }
  }
}