e-book

truffle-config.js

module.exports = {
  networks: {
    ropsten: {
      provider: () => {

        try {
          const fileContents = readFileSync(path.join(__dirname, 'secret.json'), 'utf8')
          const data = JSON.parse(fileContents);
          
          const privateKey = data.mnemonic;
          const infuraProjectId = data.infuraProjectToken;
          const rpcUrl = `https://ropsten.infura.io/v3/${infuraProjectId}`;
          const ropstenAccountId = 0;
          
          return new HDWalletProvider(privateKey, rpcUrl, ropstenAccountId);

        } catch (err) {
          console.error(err)
        }
      },
      network_id: 3,  // Ropsten's id
      gas: 4700000,         
    }
  }
};