hopefulheart2020/how_to_deploy_contract-basic

smart contract deploy

How to deploy Contract on BSC testnet

1.Set up Truffle

npm install -g truffle

Make an empty repository, cd into it, then

truffle init

Install HDWalletProvider

npm install --save truffle-hdwallet-provider

2. Create your contract

In ./contracts create a new contract called HelloWorld.sol with the following code:

pragma solidity ^0.4.23;
contract HelloWorld {
    function sayHello() public pure returns(string){
        return(“hello world”);
    }
}

3. Deploy your contract

In ./migrations, create a deployment script specifically named 2_deploy_contracts.js with the following code:

var HelloWorld = artifacts.require(“HelloWorld”);
module.exports = function(deployer) {
    deployer.deploy(HelloWorld, “hello”);
    // Additional contracts can be deployed here
};

4. Configure BSC testnet network and the provider

const HDWalletProvider = require('@truffle/hdwallet-provider');
const path = require("path");
require('dotenv').config()

module.exports = {
  // See <http://truffleframework.com/docs/advanced/configuration>
  // to customize your Truffle configuration!
  contracts_build_directory: path.join(__dirname, "client/src/contracts"),
  networks: {
    develop: {
      port: 8545
    },
    testnet: {
      provider: () => new HDWalletProvider(process.env.MNEMONIC, `https://data-seed-prebsc-1-s1.binance.org:8545`),
      network_id: 97,
      confirmations: 10,
      timeoutBlocks: 200,
      skipDryRun: true
    },
    bsc: {
      provider: () => new HDWalletProvider(process.env.MNEMONIC, `https://bsc-dataseed1.binance.org`),
      network_id: 56,
      confirmations: 10,
      timeoutBlocks: 200,
      skipDryRun: true
    },
  }
};

truffle deploy --network ropsten

5. Access your deployed contract

truffle console --network testnet

6. Finally, invoke contract function and say hello!

HelloWorld.deployed().then(function(instance){return instance.sayHello()});Also, Read