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EIP4844: Clarify ratelimit behavior for sidecar with zero blobs #3174

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merged 7 commits into from
Jan 12, 2023
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EIP4844: Clarify ratelimit behavior for sidecar with zero blobs #3174

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5a75704
Clarify behavior for empty blobs sidecar
terencechain Dec 23, 2022
42121ad
Clarify what empty means
terencechain Dec 23, 2022
518c49b
Update specs/eip4844/p2p-interface.md
terencechain Dec 23, 2022
491bb1d
Clean ups
terencechain Dec 23, 2022
7204b5c
Merge branch 'clarify-empty-blob-sidecar' of github.com:terencechain/…
terencechain Dec 23, 2022
96a5536
Add rate limit suggestion
terencechain Jan 10, 2023
8d841c8
minor copy edit
djrtwo Jan 12, 2023
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4 changes: 4 additions & 0 deletions specs/eip4844/p2p-interface.md
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Expand Up @@ -226,6 +226,8 @@ The request MUST be encoded as an SSZ-container.
The response MUST consist of zero or more `response_chunk`.
Each _successful_ `response_chunk` MUST contain a single `BlobsSidecar` payload.

In cases where a slot contains a `BlobSidecar` that does not contain any blobs, but contain non-zero `beacon_block_root` and `beacon_block_slot`, no `blobs_sidecar` is returned.
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Clients MUST keep a record of signed blobs sidecars seen on the epoch range
`[max(current_epoch - MIN_EPOCHS_FOR_BLOBS_SIDECARS_REQUESTS, EIP4844_FORK_EPOCH), current_epoch]`
where `current_epoch` is defined by the current wall-clock time,
Expand All @@ -247,6 +249,8 @@ disconnect and/or temporarily ban such an un-synced or semi-synced client.
Clients MUST respond with at least the first blobs sidecar that exists in the range, if they have it,
and no more than `MAX_REQUEST_BLOBS_SIDECARS` sidecars.

Clients MUST not respond with empty blobs sidecars.
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To clarify what an "empty" blob sidecar is. It's a BlobSidecar that does not contain any blobs, but it may contain a non-zero beacon_block_root and beacon_block_slot per get_blobs_sidecar.

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@g11tech g11tech Dec 23, 2022 •
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Suggested change
Clients MUST not respond with empty blobs sidecars.
Clients MAY skip empty blobs sidecars.


The following blobs sidecars, where they exist, MUST be sent in consecutive order.

Clients MAY limit the number of blobs sidecars in the response.
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