# Blockchain

## Definition

A blockchain is an append-oriented data structure in which ordered blocks of records are linked cryptographically and maintained according to a network's consensus rules.

## What it means in practice

Public blockchains let independent participants verify shared transaction history without relying on one database operator.

## How this concept appears in Terenval Wallet

Terenval reads and signs activity for supported blockchain networks such as Bitcoin, Ethereum and supported EVM/L2 chains; it does not replace those networks.

**Important:** Blockchain immutability does not make every transaction, token or dApp trustworthy.

**[Install Terenval Wallet](https://wallet.terenval.com/?lang=en)**

## Related terms

- [Distributed ledger](https://wallet.terenval.com/glossary/distributed-ledger/)
- [Consensus](https://wallet.terenval.com/glossary/consensus/)
- [Block](https://wallet.terenval.com/glossary/block/)
- [Blockchain node](https://wallet.terenval.com/glossary/node/)
- [bitcoin](https://wallet.terenval.com/glossary/bitcoin/)
- [ethereum](https://wallet.terenval.com/glossary/ethereum/)

## Related Terenval Answers

- [What Is a Crypto Wallet and What Does It Actually Store?](https://wallet.terenval.com/answers/what-is-a-crypto-wallet-and-what-does-it-store/)
- [Can One Crypto Wallet Manage Multiple Blockchains?](https://wallet.terenval.com/answers/can-one-crypto-wallet-manage-multiple-blockchains/)
- [How to Send Crypto Safely Between Wallets](https://wallet.terenval.com/answers/how-to-send-crypto-safely-between-wallets/)

Official page: https://wallet.terenval.com/glossary/blockchain/