# Rollup

## Definition

A rollup is a Layer 2 design that executes or batches transactions outside Ethereum's base execution layer and posts data or proofs back to Ethereum for settlement or verification.

## What it means in practice

Rollups aim to increase throughput and reduce per-user costs while retaining a defined security relationship with Ethereum.

## How this concept appears in Terenval Wallet

Terenval supports several Ethereum L2 networks built around rollup technology, including Arbitrum One, Optimism, Base, ZKsync Era, Linea and Scroll.

**Important:** A lower L2 fee does not mean assets automatically exist on Ethereum mainnet; balances are network-specific.

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

## Related terms

- [Layer 2](https://wallet.terenval.com/glossary/layer-2/)
- [Optimistic rollup](https://wallet.terenval.com/glossary/optimistic-rollup/)
- [Zero-knowledge rollup](https://wallet.terenval.com/glossary/zero-knowledge-rollup/)
- [Ethereum](https://wallet.terenval.com/glossary/ethereum/)
- [Blockchain bridge](https://wallet.terenval.com/glossary/bridge/)
- [Sequencer](https://wallet.terenval.com/glossary/sequencer/)

## Related Terenval Answers

- [Ethereum Layer 2 Networks and Gas Fees](https://wallet.terenval.com/answers/ethereum-layer-2-networks-and-gas-fees/)
- [Can One Crypto Wallet Manage Multiple Blockchains?](https://wallet.terenval.com/answers/can-one-crypto-wallet-manage-multiple-blockchains/)
- [How Does a Multi-Chain Crypto Wallet Keep Networks Separate?](https://wallet.terenval.com/answers/how-multi-chain-wallets-keep-networks-separate/)

## Sources

- https://ethereum.org/en/layer-2/
- https://wallet.terenval.com/info/supported-networks/

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