Knowledge base
2 mins
What are Testnet and Mainnet in Blockchain?

Cryptocurrencies and blockchain technology have taken the financial world by storm, giving rise to various terms and concepts that might be difficult to understand for the uninitiated. Two such terms are “mainnet” and “testnet.”


In this article, we will examine these terms and explain their significance in the blockchain ecosystem.

Introduction to Mainnet and Testnet in Blockchain

Simply put, a mainnet is the primary network where actual transactions occur, while a testnet serves as a sandbox for developers to test and refine their projects (using cryptoassets with no real value) before releasing them to the public.

What is a Mainnet?

Mainnet, or the main network, is essentially the beating heart of any blockchain project. It's where actual, real-world transactions take place. On the mainnet, cryptocurrencies have real value, and genuine transfers of digital assets occur.

Beyond just transactions, mainnets support various other operations, from smart contracts to decentralized applications (dApps). The transactions executed here are recorded and stored permanently on the blockchain. For example, Bitcoin and Ethereum each have their own respective mainnets.

What is a Testnet?

Before a project goes live on the mainnet, it's rigorously tested on the testnet. This network is a replica of the mainnet but operates in a controlled environment, where developers can freely test without real-world consequences.

The testnet is indispensable for developers. It's a network that allows them to identify bugs, test features, and refine their projects in a risk-free environment. Because the assets used on the testnet have no real value, developers can launch dApps without any real consequences that could cost users real money.

Differences Between Mainnet and Testnet

At first glance, mainnet and testnet might seem similar, but they serve distinct purposes. The mainnet is the real deal – it's where actual transactions with real assets take place. Testnet, on the other hand, is a simulation – a place for testing and refinement. While mainnet transactions have economic implications, testnet transactions are consequence-free, ensuring a safe testing environment.

Consider, for example, Ethereum—one of the most prominent blockchain platforms. Before any update or new feature is rolled out on the Ethereum mainnet, it's first tested on the Ethereum testnet. Only after thorough testing and community feedback are changes implemented on the mainnet.