无法使用 Truffle Infura 将智能合约部署到测试网 (Ropsten)

Question

I'm trying to deploy a simple smart contract to Testnet Ropsten but always fails with the following error:

Error: *** Deployment Failed ***

"Migrations" -- Transaction was not mined within 750 seconds, please make sure your transaction was properly sent. Be aware that it might still be mined..

I've searched in many places, and it says to change the gas value, I tried almost every value but still got the same error. Sometimes it says that the gas value is not enough and sometimes it's too much.

This is my code:

require("dotenv").config();
const HDWalletProvider = require("truffle-hdwallet-provider");
const MNEMONIC = process.env.MNEMONIC;

module.exports = {
  networks: {
    development: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*",
    },
    ropsten: {
      provider: function () {
        return new HDWalletProvider(
          MNEMONIC,
          `https://ropsten.infura.io/v3/${process.env.INFURA_API_KEY}`
        );
      },
      network_id: 3,
      gas: 5500000, // Here I tried from 1000000 to 5500000
    },
  },
  compilers: {
    solc: {
      version: "0.8.10",
    },
  },
};

Contract:

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.3;

contract HelloWorld {
    function sayHello() public pure returns(string memory){
        return("hello world");
    }
}

Migrations:

const Migrations = artifacts.require("Migrations");

module.exports = function (deployer) {
  deployer.deploy(Migrations);
};

const HelloWorld = artifacts.require("HelloWorld");
module.exports = function (deployer) {
  deployer.deploy(HelloWorld, "hello");
};

I have my metamask wallet with 1 ether in red ropstem

Any idea on how to deploy a smart contract in a testnet?

Answer 1

It might be because, you are not speciying address and gasPrice. gasPrice varies depending on network activities. You can get the current gasPrice here: https://ethgas.watch/

ropsten: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: {
            phrase: MENMONICS,
          },
          providerOrUrl: `https://ropsten.infura.io/v3/${process.env.INFURA_API_KEY}`,
          // first address
          addressIndex: 0,
        }),
      network_id: 3,
      gas: 5500000, 
      // this might varies depending on the network activity
      gasPrice: 20000000000, 
      confirmations: 2, // number of blocks to wait between deployment
      timeoutBlocks: 200, // number of blocks before deployment times out
    },