What it means
A kind of layer 2 that rolls many transactions into one batch and posts it to the main chain.
Optimistic rollups, like Base, assume the batch is correct unless someone proves otherwise within a set window.
How it works
Rollups inherit much of the main chain's security at a fraction of the cost.
Related terms
| Term | What it means |
|---|---|
| Layer 2 | A network built on top of a main blockchain such as Ethereum that handles transactions faster and for less. |
| Base | A public blockchain built by Coinbase that runs on top of Ethereum, with low fees and fast confirmations. |
| Sequencer | The operator of a layer 2 that puts transactions in order and bundles them for the main chain. |
This glossary explains terms in general. It isn't investment, tax or legal advice.