Optimistic Rollups
A way to speed up Ethereum by processing transactions separately, assuming they're valid. Anyone can challenge suspicious transactions.
Example
Using Optimism to trade with much lower fees, with a 7-day waiting period when moving money back to main Ethereum.
Related Terms
Advanced Concepts
⚙️How It Works
- 1
Submit Transactions
Users send transactions to the L2 sequencer
- 2
Optimistic Execution
Transactions are processed assuming they're valid
- 3
Challenge Period
7 days for anyone to submit a fraud proof if invalid
- 4
Finalization
After challenge period, transactions are finalized on L1
⚖️Optimistic vs ZK Rollups
| Feature | optimistic | zk |
|---|---|---|
| Withdrawal Time | 7 days | Minutes-hours |
| EVM Compatibility | Full | Varies |
| Maturity | More established | Newer tech |
| Proof Cost | Only if challenged | Every batch |