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Summary of ChangesHello @jcstein, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces new documentation pages that describe how two major rollup solutions, Arbitrum Nitro and OP Stack, can integrate with Celestia for data availability. The documentation outlines the mechanisms, benefits, and specific implementations for using Celestia as an alternative data availability layer, aiming to enhance scalability and reduce costs for these blockchain stacks. Highlights
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Code Review
This pull request adds documentation for integrating Arbitrum Nitro and OP Stack with Celestia for Data Availability. The documentation is well-structured and provides a good technical overview. My feedback focuses on improving the long-term maintainability of the documentation by using permanent links to code references.
| Nitro's batch poster coordinates with the Celestia DAS server to store batch data: | ||
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| 1. **Batch posting**: The [`MaybePostSequencerBatch`](https://github.com/celestiaorg/nitro/blob/v3.6.8/arbnode/batch_poster.go#L1675) method checks if a DAS writer is configured and acquires a lock before posting | ||
| 2. **Data storage**: The DAS writer calls the Celestia server's [`Store`](https://github.com/celestiaorg/nitro-das-celestia/blob/main/daserver/celestia.go#L302) method, which: |
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For long-term stability of the documentation, it's better to link to a specific commit hash or tag instead of the main branch. The main branch can be updated, which might make the line number in the link point to incorrect or irrelevant code in the future. For example, the link on line 11 correctly uses a tag (v3.6.8).
| 1. **Data submission**: The batcher calls [`publishTxToL1`](https://github.com/ethereum-optimism/optimism/blob/develop/op-batcher/batcher/driver.go#L931) which retrieves batch data from the channel manager | ||
| 2. **Celestia storage**: For Celestia-enabled chains, [`celestia_storage.Put`](https://github.com/celestiaorg/op-alt-da/blob/main/celestia_storage.go#L200) submits the blob to Celestia using a configured namespace | ||
| 3. **Commitment recording**: A commitment identifier (version byte + blob ID) is generated and recorded on Ethereum | ||
| 4. **Data retrieval**: When `op-node` needs data, it reads the commitment from Ethereum, then fetches the actual blob from Celestia | ||
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| ## Celestia fork differences | ||
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| The [Celestia fork](https://github.com/celestiaorg/optimism/blob/celestia-develop/op-batcher/batcher/driver.go#L1092) of OP Stack includes: |
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The links to code on lines 11, 12, and 18 point to mutable branches (develop, main, and celestia-develop). To ensure the documentation remains accurate and the links don't break or become misleading over time, it's a best practice to use permalinks that point to a specific commit hash or a tag. This guarantees that the link will always point to the exact version of the code being referenced.
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Overview