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A Quick Introduction to Writing Smart Contracts on the Ethereum Blockchain

Within the vast and exciting landscape of the *blockchain*, perhaps nothing holds as much potential as *smart contracts*. These are self-executing contracts with the agreement between buyer and seller directly written into lines of code on the blockchain. Today, we will quickly introduce you to writing smart contracts on the Ethereum blockchain, the leading platform for such activity.

Step 1: Understanding What a Smart Contract is and How it Works on Ethereum

A smart contract is a digital agreement between two parties that automatically executes itself once the conditions coded into it are met. On the Ethereum blockchain, these contracts are written in an Ethereum-specific language called *Solidity*. Ethereum’s blockchain then tracks these contracts, making sure all actions are executed as coded.

Step 2: Get Yourself an Ethereum Test Network

To safely write, test, and deploy your smart contracts, you’ll need an Ethereum test network to work on. Examples of test networks are *Ropsten*, *Kovan*, and *Rinkeby*. You can connect to these networks through an Ethereum client like Geth or Parity or through a service like Infura.

Step 3: Learn Solidity

An understanding of *Solidity* is crucial to smart contract development on Ethereum. This high-level, statically-typed programming language was specifically designed for implementing smart contracts within the Ethereum ecosystem. You can start with the official Solidity documentation and dive into various online tutorials and courses to learn.

Step 4: Writing Your First Smart Contract

Let’s write our first basic contract. You can use an IDE like Remix for this purpose.

Here’s an example of a simple smart contract that stores a single number:

pragma solidity ^0.4.22;

contract SimpleStorage {
uint storedData;

function set(uint x) public {
storedData = x;

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

  • SimpleStorage is the contract name.
  • storedData is a state variable (where the contract’s data resides).
  • set() and get() are functions that update and retrieve the state variable.

Step 5: Deploy Your Smart Contract

After writing the smart contract, the next step is deployment. This can be done using Remix (an online Ethereum IDE), Truffle (a development environment), or even manually using web3.js.

We’ve only skimmed the surface of Ethereum smart contract writing here. Keep exploring, learning, and experimenting. As you understand more about blockchain and smart contract technology, you’ll be unlocking the future of digital agreements.

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