History

Etan Kissling 3bc42994e4 update to latest LC test format (#3879 ) The EF test format for the LC sync protocol is modified to verify checks after each step: https://github.com/ethereum/consensus-specs/pull/2938 - The test runner is updated accordingly.		2022-07-23 05:54:01 +00:00
..
README.md	update CL spec URLs (#3690 )	2022-06-01 15:52:45 +00:00
batch_validation.nim	bearssl: split abi (#3755 )	2022-06-21 10:29:16 +02:00
block_processor.nim	optimistic block gossip validation (#3876 )	2022-07-21 21:39:43 +03:00
eth2_processor.nim	Introduce message router (#3829 )	2022-07-06 16:11:44 +00:00
gossip_validation.nim	optimistic block gossip validation (#3876 )	2022-07-21 21:39:43 +03:00
light_client_processor.nim	update to latest LC test format (#3879 )	2022-07-23 05:54:01 +00:00

Gossip Processing

This folder holds a collection of modules to:

validate raw gossip data before
- rebroadcasting it (potentially aggregated)
- sending it to one of the consensus object pools

Validation

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

There are multiple consumers of validated consensus objects:

a ValidationResult.Accept output triggers rebroadcasting in libp2p
- We jump into method validate(PubSub, Message) in libp2p/protocols/pubsub/pubsub.nim
- which was called by rpcHandler(GossipSub, PubSubPeer, RPCMsg)
a blockValidator message enqueues the validated object to the processing queue in block_processor
- blockQueue: AsyncQueue[BlockEntry] (shared with request_manager and sync_manager)
- This queue is then regularly processed to be made available to the consensus object pools.
a xyzValidator message adds the validated object to a pool in eth2_processor
- Attestations (unaggregated and aggregated) get collected into batches.
- Once a threshold is exceeded or after a timeout, they get validated together using BatchCrypto.

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