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Glossary

This glossary contains terms related to rollup integrations and EigenDA. It attemps to use stack-agnostic terms, and detail the equivalent terms in the different rollup stacks.

Cert Punctuality Window​

The time window (in number of L1 blocks) during which a batcher must submit a batch to the rollup inbox after it has been created.

A cert is considered valid when it is included onchain before the cert's ReferenceBlockNumber (RBN) + the cert's CPW (Cert punctuality window).

RBN < cert.L1InclusionBlock < RBN+CPW

A default CPW of 12 hours (3600 blocks on ethereum mainnet) is recommended. For OP specifically, this number should be at least as large as the sequencerWindowSize.

Rollup Batcher​

Sequencer service (can either be a separate binary, or a thread in the sequencer) that is responsible for batching transactions (or state diffs) and sending them to the rollup inbox.

Rollup Inbox​

Ethereum address where the rollup batcher sends the batch of transactions (or state diffs). This can either be an EOA (op-stack) or a contract (nitro, zksync).

  • op stack: batcher inbox (EOA)
  • nitro stack: sequencer inbox (contract)
  • zk stack: ExecutorFacet (sometimes also simply referred to as diamond proxy)