Implement engine_getBlobsV1

[somnathb1]

Rationale

Why should this feature exist?
Helps CL fetch blobs directly from the EL's mempool, not having to wait on p2p to get blobs

What are the use-cases?
To be used by CLs and Caplin

Refer to https://github.com/ethereum/execution-apis/blob/main/src/engine/cancun.md#engine_getblobsv1

Implementation

Do you have ideas regarding the implementation of this feature?

• Create a memory map for Blob hashes in the TxPool
• Implement method eth_getBlobs in the Engine-API

Are you willing to implement this feature?
Yeah

[jasonyic]

I am still getting the following error on erigon v3.0.0, thought was merged already 3 weeks earlier

2025-03-26 09:45:19.837 WARN  - Local EL blobs lookup failed: Invalid remote response from the execution client: JSON-RPC error: Method not found (-32601): the method engine_getBlobsV1 does not exist/is not available

[somnathb1]

I am still getting the following error on erigon v3.0.0, thought was merged already 3 weeks earlier

2025-03-26 09:45:19.837 WARN  - Local EL blobs lookup failed: Invalid remote response from the execution client: JSON-RPC error: Method not found (-32601): the method engine_getBlobsV1 does not exist/is not available

We had a code-freeze, didn't make it to the release in time. cc @yperbasis

[jasonyic]

thank you, just to confirm.