What is a Layer 2 network?
ZK Rollups use validity proofs to confirm state changes to the mainnet, so withdrawals don’t require a week-long challenge period.
Rollups are currently the most popular Layer 2 solution, and come in two types: Optimistic Rollups and ZK Rollups.
When managing funds, the most important thing to check is whether you’re using an official bridge or a third-party cross-chain bridge to transfer assets from Layer 2 back to the mainnet. Transfer times and risks differ.
$ARB 0.1698 (+1.13%)

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Market conditions change quickly, so make your own judgment.