nimbus-eth2/beacon_chain/gossip_processing
zah eb2dc5cbbb
Implement the new Altair req/resp protocols (#2676)
* Implement the new Altair req/resp protocols

Also fixes the altair message-id computation by providing the correct
forkdigest prefix in `isAltairTopic`.

Co-authored-by: Tanguy Cizain <tanguycizain@gmail.com>
2021-07-07 12:09:47 +03:00
..
README.md Reorg (5/5) (#2377) 2021-03-05 14:12:00 +01:00
batch_validation.nim remove false OnBlockAdded dependency on phase0 HashedBeaconState (#2661) 2021-06-21 08:35:24 +00:00
block_processor.nim Implement the new Altair req/resp protocols (#2676) 2021-07-07 12:09:47 +03:00
consensus_manager.nim singe validator key cache 2021-06-01 20:43:44 +03:00
eth2_processor.nim Implement the new Altair req/resp protocols (#2676) 2021-07-07 12:09:47 +03:00
gossip_validation.nim use ForkedHashedBeaconState in StateData (#2634) 2021-06-11 20:51:46 +03:00

README.md

Gossip Processing

This folders hold a collection of modules to:

  • validate raw gossip data before
    • rebroadcasting them (potentially aggregated)
    • sending it to one of the consensus object pool

Validation

Gossip Validation is different from consensus verification in particular for blocks.

There are 2 consumers of validated consensus objects:

  • a ValidationResult.Accept output triggers rebroadcasting in libp2p
    • method validate(PubSub, message) in libp2p/protocols/pubsub/pubsub.nim in the
    • which was called by rpcHandler(GossipSub, PubSubPeer, RPCMsg)
  • a xyzValidator message enqueues the validated object in one of the processing queue in eth2_processor
    • blocksQueue: AsyncQueue[BlockEntry], (shared with request_manager and sync_manager)
    • attestationsQueue: AsyncQueue[AttestationEntry]
    • aggregatesQueue: AsyncQueue[AggregateEntry]

Those queues are then regularly processed to be made available to the consensus object pools.

Security concerns

As the first line of defense in Nimbus, modules must be able to handle burst of data that may come:

  • from malicious nodes trying to DOS us
  • from long periods of non-finality, creating lots of forks, attestations, forks