[Core Protocol] Sync without beacon node & sync pruned blob

[pengin7384]

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Issue Description

Hi. I have some questions about ecotone update.

1. Can I run op-node without beacon node? I think op-node can receive blocks from p2p network, instead of derive from blob.
2. If my op-node misses the blob pruning cycle, is there any other way than using the latest snapshot where the blob has not been deleted yet, or syncing from the blob-archiver?
   There are L2 blocks in the blob, but since that information is also available to other nodes, can't it be received from other Op-nodes through p2p?

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[sbvegan]

Can I run op-node without beacon node? I think op-node can receive blocks from p2p network, instead of derive from blob.

No you need the beacon node endpoint. The rollup node needs to be able to derive blocks from the safe head from the L1.

If my op-node misses the blob pruning cycle, is there any other way than using the latest snapshot where the blob has not been deleted yet, or syncing from the blob-archiver?

There are three ways to handle this:

• the node is always online
• utilize a blob archiver
• utilize snap sync, this is being added to the next software release

There are L2 blocks in the blob, but since that information is also available to other nodes, can't it be received from other Op-nodes through p2p?

No, the rollup node need to be able to read from the L1. This is how the rollup can inherit security from the L1.

[pengin7384]

Thank you for your answers! 👍 👍

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