refactor(l1): discovery service - #1768
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…o its own folder and files
MarcosNicolau
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Jan 22, 2025
allow many arguments is a temprarily fix, this will be soled in #1768
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MarcosNicolau
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Jan 23, 2025
Comment on lines
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| let digest = Keccak256::digest(msg.get(65..).ok_or(RLPxError::InvalidMessageLength())?); | ||
| let signature = &Signature::from_bytes( | ||
| msg.get(..64) | ||
| .ok_or(RLPxError::InvalidMessageLength())? | ||
| .into(), | ||
| )?; | ||
| let rid = RecoveryId::from_byte(*msg.get(64).ok_or(RLPxError::InvalidMessageLength())?) | ||
| .ok_or(RLPxError::InvalidRecoveryId())?; | ||
| let peer_pk = VerifyingKey::recover_from_prehash(&digest, signature, rid)?; |
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I remove this because it is recovering the pubkey points bytes (node_id) from the msg, something we already do when decoding the packet (see https://github.com/lambdaclass/ethrex/blob/main/crates/networking/p2p/discv4.rs#L87-L97).
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This is great, missed to comment this on previous review!
MarcosNicolau
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Jan 23, 2025
| pub(crate) type RLPxConnBroadcastSender = broadcast::Sender<(tokio::task::Id, Arc<Message>)>; | ||
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| // https://github.com/ethereum/go-ethereum/blob/master/p2p/peer.go#L44 | ||
| pub const P2P_MAX_MESSAGE_SIZE: usize = 2048; |
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The spec doesn't mention a max size but we were using the max size of the discovery protocol, and reading geth code they define 2048 as the max packet size in rlpx, see here.
MarcosNicolau
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Jan 23, 2025
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| tracker.spawn(networking); | ||
| .await.expect("Network starts"); |
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Note that we don't need to spawn the networking as a task. This allows us to panic if there is an err during the network startup.
MarcosNicolau
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January 23, 2025 22:21
ElFantasma
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Jan 27, 2025
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Most comments are minor issues. And some may be wrong 😬
Good work overall!
pedrobergamini
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Aug 24, 2025
**Motivation** Discovery service was becoming too big and unmanageable to be inside `net.rs`. **Description** This refactor splits the discovery service into its own structs and files, now the flow is: - `Discv4` struct: handles the core logic of the `discv4` protocol - Loading bootnodes - Listening for incoming connections and handling messages - Managing revalidations - Initiating lookups - `Discv4LookupHandler`: the complexity of the lookups is encapsulated in this struct. The following improvements have also been made: - All Tokio tasks are now spawned using the tracker. - When receiving neighbors' messages, now we check we do not add ourselves to the table (which could occur occasionally). - Error handling has been improved, and the verification logic is now more readable, especially within message handling. Closes None
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Motivation
Discovery service was becoming too big and unmanageable to be inside
net.rs.Description
This refactor splits the discovery service into its own structs and files, now the flow is:
Discv4struct: handles the core logic of thediscv4protocolDiscv4LookupHandler: the complexity of the lookups is encapsulated in this struct.The following improvements have also been made:
Closes None