How does the mainnet know that a result submitted by a Rollup is correct?
Optimistic Rollups initially assume that submitted results are correct. During the challenge period, anyone can submit a fraud proof to challenge a result.
If the fraud proof is upheld, the incorrect result is overturned, and the party that submitted it has their deposit slashed.
The most important thing to keep in mind when managing funds: allow about a week for the challenge period before withdrawing from an Optimistic Rollup. Don’t wait until the last minute to use the official bridge for money you need urgently.
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