HelloWorld.sol

🟩 This is a beginner track.

📜 TL;DR:

In this tutorial, we will utilize Remix IDE, a versatile, open-source web-based platform, to develop and deploy our smart contract onto Hemi testnet.
This guide is tested to work with Solidity version 0.8.26. If you experience any issues, try setting this version explicitly in the Solidity Compiler tab on Remix.
Earn and track Hemi Miles for completing this tutorial!

🏁 Prerequisites

📚 Tutorial

Video

1. Go to Remix IDE

Remix IDE is a powerful, open-source web application for developing, compiling, and deploying Ethereum smart contracts with ease.

2. Add the Smart Contract

In Remix IDE, start by creating a new file named HelloWorld.sol.

The following contract is a basic example designed for interaction. Copy the code below and paste it into the file HelloWorld.sol.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract HelloWorld {
    string public greeting = "Hello, World!";

    function getGreeting() public view returns (string memory) {
        return greeting;
    }

    function setGreeting(string memory _greeting) public {
        greeting = _greeting;
    }
}

3. Compile the Contract

Select Compile HelloWorld.sol button to use the Remix IDE's Solidity compiler. Check for any compilation errors and fix them.

4. Connect Remix To MetaMask

The address you choose to connect MUST have some ETH (recommended at least 0.01 ETH) to pay for contract deployment fees. Refer back to earlier documentation to fund your Hemi address with ETH.

Choose Injected Provider - MetaMask under "Environment".