Ethereum Layer 2 solutions boost transaction speeds and cut fees. But they rely heavily on Layer 1. Ethereanbull.eth explained why L2s need L1 for finality, fraud prevention, and data integrity.
According to Ethereanbull.eth X post, L2s use `submitBatch` to send transaction data to L1. This step makes L2 data available and secure. Without this, L2 data could be lost. Validators on L1 confirm L2 states and create a reliable source of truth. L1 acts as the safe storage that keeps L2s accountable.
Optimistic rollups depend on L1 for fraud detection. If a rollup finds a suspicious batch, it flags it on L1 for review. L1 handles disputes to maintain trust. Without L1, there is no way to stop fraud.
Also, within the case of the ZK-rollups, the dependencies rest on validity proofs confirmed on L1. The checks run at L2 through `verifyProof`, navigating the proper care taken that a batch is indeed valid. Such confirmation, in the first place, depends upon L1. Without the involvement of L1, it is not possible for the L2s to ensure the same level of security.
Achieving finality on Ethereum L2s through L1 commitments
Moreover, Finality on L2 happens when batches are locked on L1 with `commitBatch.` This final step ensures that the L2 state is set. Without this, L2s stay exposed to risks.
L2s use L1 contracts to hold ETH while the system issues matching tokens. The bond between the two parties keeps the value of assets from dwindling. In the absence of it, L2 tokens could become valueless. L1 is responsible for the security of these transactions and shows their reliability.
Nevertheless, L2s extend Ethereum’s L1 but can’t replace it. They need L1 for data, fraud prevention, finality, and asset safety. Without L1’s consensus and protocols, L2s lose their integrity. Ethereum’s L1 holds the network together, securing every layer above it.
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