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A Crash Course in Building a Simple Ethereum Smart Contract

In today’s increasingly digitally-focused world, blockchain technology is emerging as a game-changer. With the ability to create immutable transparent transactions, blockchain tech has already revolutionized areas like finance and supply chain. But blockchain is not only about Bitcoin or other cryptocurrencies; its potential stretches far more. In this tutorial, we will walk you through creating a basic Ethereum smart contract using Solidity programming language.

Prerequisite Tools

Before venturing into the nitty-gritty of smart contract coding, you need to equip your digital arsenal with some necessary tools:

  • MetaMask: A crypto wallet and gateway to blockchain apps. Install it as a browser extension.
  • Remix: A powerful, open-source tool used for writing Solidity contracts.

Steps to Create an Ethereum Smart Contract

1. Setting up MetaMask

Start off by setting up your MetaMask account. Here, your account alias is similar to a username, while the public and private keys are akin to your email address and password, respectively. Never share your private keys!

2. Building the Contract in Remix

Head to the Remix Ethereum website to code your smart contract. This contract will basically be an Ethereum-based P2P transaction. Think of it as a Dropbox file accessible to all but changeable only if conditions are met.

The code is executed as follows:

pragma solidity ^0.4.24;

contract MySmartContract {
function set(uint _x) public {
x = _x;

function get() public view returns (uint) {
return x;

uint x;

3. Deploying and Interacting with Your Smart Contract

After crafting your contract, the next step is deploying it. Press the ‘Deploy’ button after selecting “Injected Web3” under the ‘Environment’ dropdown. This lets Remix connect with MetaMask and deploy the contract onto the blockchain.

Once deployed, you can interact with your contract under the ‘Deployed Contracts’ section.


Voila! You’ve created your first Ethereum smart contract. This basic contract acts as a foundation for you to explore more complex blockchain areas like ICOs, DApps, or DAOs. Remember, with great blockchain power comes great responsibility. Happy BUIDLing!

Disclaimer: This guide is for educational purposes only. Always ensure you understand potential risks and legal implications before working with blockchain technology or cryptocurrency.

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