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REST API produceBlockV3 implementation #5474
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beacon_chain/spec/mev/deneb_mev.nim
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@@ -89,6 +89,11 @@ type | |||
signed_blinded_blob_sidecars*: | |||
List[SignedBlindedBlobSidecar, Limit MAX_BLOBS_PER_BLOCK] | |||
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BlindedBlockContents* = object |
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Would be good to either note as explicitly non-spec, or if it's derived from, e.g., a Beacon API requirement fairly directly (it's the type required by or returned by some REST endpoint), link to a stable, not master
/main
/etc URL for that.
writer.endRecord() | ||
writer.endRecord() | ||
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proc readValue*(reader: var JsonReader[RestJson], |
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Why would the REST server ever have to read a BlindedBeaconBlock
it doesn't know the specific fork of already? It's for proposing, in the moment, and if it doesn't match the current slot/epoch it's not relevant to the node.
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This is not for REST server it is made for VC, because VC will use this readValue
procedure to decode produceBlockV3
response.
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The VC knows too though. It knows the fork schedule and if it's asking for a produceBlockV3
response during Capella, anything except a Capella response is simply an error.
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The REST library uses a single type for each API, so the Forked
type is needed here I think.
qslot, proposer, qrandao, qskip_randao_verification): | ||
return RestApiResponse.jsonError(Http400, InvalidRandaoRevealValue) | ||
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(await node.makeBeaconBlockForHeadAndSlotV3(qrandao, qgraffiti, qhead, |
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It apparently needs ForkedAndBlindedBeaconBlock
here primarily because it's storing one as message
, but then it immediately does two things with this message
:
- calls
getHeaders
(defined above); and - calls
RestApiResponse.sszResponse
, not even on theForked
type per se, but on each specific case object field. See question there about whywriteValue
is defined onForkedAndBlindedBeaconBlock
, as a result.
But neither really requires storage of a forked/"any fork" version of a BlindedBeaconBlock
or BlindedBeaconBlockContents
, because what this produceBlockV3
endpoint returns is neither, but a bytestring of some sort (e.g., SSZ). So it's still unclear to me why have all this infrastructure for a ForkedAndBlindedBeaconBlock
which seems not to be necessary to begin with.
The result is hundreds of lines of
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I think you need some form of ForkedBlindedBeaconBlock
, because v3 may return either forked or non-forked depending on which one is better. And that is not known at call-time.
This, unless you want to do that logic inside the REST layer, which doesn't seem correct, because it makes it non-reusable, e.g., for the non-VC local block proposal flow.
Also having a Forked
type instead of forky MaybeBlindedBeaconBlock
makes it consistent with the existing v1/v2 makeBeaconBlockForHeadAndSlot
which also returns a ForkedBeaconBlock
.
consensusValue: Opt[UInt256] | ||
data: Opt[JsonString] | ||
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for fieldName in readObjectFields(reader): |
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Is this entire loop, with its specifically handwritten multiple-field detection, etc, not basically equivalent to something like
type
RestForkedAndBlindedBeaconBlockSkeleton = object
version: Opt[string] # because it otherwise has to do a special conversion
blinded: Opt[bool]
executionValue: Opt[UInt256]
consensusValue: Opt[UInt256]
data: Opt[JsonString]
and then letting the JSON parser handle this, or would it not detect multiple fields with each name?
It seems like recreating logic that exists elsewhere.
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there's also strictParse
for the other fields and so on.
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More deser logic.
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Co-authored-by: Jacek Sieka <jacek@status.im>
No description provided.