Layer 2 Basics
Learn mainnet relationships, bridging, confirmations and network selection with practical security checks and on-chain verification guidance.
Core concept
Layer 2 systems process more activity outside mainnet and publish key data, proofs or state commitments back to it. Different designs have different settlement and withdrawal characteristics.
Layer 2 Basics should be understood in the broader wallet and on-chain context. Identify the asset, network and controlling address, then determine whether the next step creates a connection, signature, approval or transaction. A clear model of mainnet relationships, bridging, confirmations and network selection makes it easier to separate interface messages from actual on-chain state.
Operating sequence
Moving assets between mainnet and Layer 2 usually involves a bridge or protocol-defined path. Confirm source network, destination network, asset and receiving address at every step.
For mainnet relationships, bridging, confirmations and network selection, use a deliberate sequence: verify the entry point, confirm the network, check the address or contract, review the exact request, then submit. For asset movement, also verify the amount, fee and transaction hash. For DApps, distinguish connection, message signatures, transaction signatures and token approvals because they create different permissions.
Common mistakes and verification
Cross-layer actions can involve source-chain confirmation, message passing, proofs or challenge periods, so settlement and withdrawal time may differ substantially from a normal transfer.
Common mistakes include using the wrong network, copying a bad address, ignoring token contracts, treating pending transactions as failures, or accepting an unclear approval. Troubleshoot mainnet relationships, bridging, confirmations and network selection with verifiable data such as transaction hashes, block heights, address history and contract addresses instead of relying only on interface messages.
Security and risk boundary
Wallets can display networks with similar names. Check Chain ID and reliable documentation, and remember that third-party bridges can add smart-contract and operational risk.
Seed phrases and private keys should remain under the user’s control. Official support should not request them, and verification codes should never be shared. Third-party DApps, smart contracts and network services can introduce risk. Because confirmed transactions are usually not reversible by the wallet alone, pre-signing checks are essential.