Truffle: Deploying a Smart Contract

Learn how to deploy a simple Solidity-based smart contract to Majestic StarChain using the Truffle environment

Truffle (opens new window) is a development framework for deploying and managing Solidity (opens new window) smart contracts.

Install Dependencies

First, install the latest Truffle version on your machine globally.

Copy yarn install truffle -g

Create Truffle Project

In this step we will create a simple counter contract. Feel free to skip this step if you already have your own compiled contract.

Create a new directory to host the contracts and initialize it:

Copy mkdir mjt-truffle cd mjt-truffle

Initialize the Truffle suite with:

Copy truffle init

Create contracts/Counter.sol containing the following contract:

Copy pragma solidity >=0.7.0 <0.9.0; contract Counter { uint256 counter = 0; function add() public { counter++; } function subtract() public { counter--; } function getCounter() public view returns (uint256) { return counter; } }

Compile the contract using the compile command:

Copy truffle compile

Create test/counter_test.js containing the following tests in Javascript using Mocha (opens new window):

Copy const Counter = artifacts.require("Counter") contract('Counter', accounts => { const from = accounts[0] let counter before(async() => { counter = await Counter.new() }) it('should add', async() => { await counter.add() let count = await counter.getCounter() assert(count == 1, `count was ${count}`) }) })

Truffle configuration

Open truffle-config.js and uncomment the development section in networks:

Copy development: { host: "http://test.validator-1.majesticchain.io", // Localhost (default: none) port: 8545, // Standard Ethereum port (default: none) network_id: "*", // Any network (default: none) },

This will allow your contract to connect to your Majestic StarChain local node.

Deploy contract

In the Truffle terminal, migrate the contract using:

Copy truffle migrate --network development