Crypto glossary

Mainnet

Definition

A mainnet is the live, production version of a blockchain, where transactions are final and tokens carry real economic value, unlike a test network.

A mainnet is the public network on which a blockchain actually runs: nodes process real transactions, validators or miners earn real rewards and the native token has a market price. It is the counterpart of a testnet, where the same software runs with free tokens so developers can experiment without risk.

In news, "mainnet launch" marks the moment a project moves from testing to production. Many tokens first circulate as ERC-20 tokens on Ethereum and are later swapped for native coins once the project's own mainnet goes live. Ethereum's mainnet started in July 2015; large upgrades are rehearsed on testnets before they reach it.

A mainnet launch is a technical milestone, not proof of adoption or security. Early mainnets are often labeled beta, may depend on a small validator set and can suffer outages or emergency patches, so bugs at this stage cost real money.

Example

A team that has spent a year on testnet announces its mainnet launch; from that block on, sending 100 of its tokens costs a real fee and cannot be undone.

Related terms

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