sc_consensus_beefy/communication/
mod.rs

1// This file is part of Substrate.
2
3// Copyright (C) Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
5
6// This program is free software: you can redistribute it and/or modify
7// it under the terms of the GNU General Public License as published by
8// the Free Software Foundation, either version 3 of the License, or
9// (at your option) any later version.
10
11// This program is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License
17// along with this program. If not, see <https://www.gnu.org/licenses/>.
18
19//! Communication streams for the BEEFY networking protocols.
20
21pub mod notification;
22pub mod request_response;
23
24pub(crate) mod gossip;
25pub(crate) mod peers;
26
27pub(crate) mod beefy_protocol_name {
28	use array_bytes::bytes2hex;
29	use sc_network::ProtocolName;
30
31	/// BEEFY votes gossip protocol name suffix.
32	const GOSSIP_NAME: &str = "/beefy/2";
33	/// BEEFY justifications protocol name suffix.
34	const JUSTIFICATIONS_NAME: &str = "/beefy/justifications/1";
35
36	/// Name of the votes gossip protocol used by BEEFY.
37	///
38	/// Must be registered towards the networking in order for BEEFY voter to properly function.
39	pub fn gossip_protocol_name<Hash: AsRef<[u8]>>(
40		genesis_hash: Hash,
41		fork_id: Option<&str>,
42	) -> ProtocolName {
43		let genesis_hash = genesis_hash.as_ref();
44		if let Some(fork_id) = fork_id {
45			format!("/{}/{}{}", bytes2hex("", genesis_hash), fork_id, GOSSIP_NAME).into()
46		} else {
47			format!("/{}{}", bytes2hex("", genesis_hash), GOSSIP_NAME).into()
48		}
49	}
50
51	/// Name of the BEEFY justifications request-response protocol.
52	pub fn justifications_protocol_name<Hash: AsRef<[u8]>>(
53		genesis_hash: Hash,
54		fork_id: Option<&str>,
55	) -> ProtocolName {
56		let genesis_hash = genesis_hash.as_ref();
57		if let Some(fork_id) = fork_id {
58			format!("/{}/{}{}", bytes2hex("", genesis_hash), fork_id, JUSTIFICATIONS_NAME).into()
59		} else {
60			format!("/{}{}", bytes2hex("", genesis_hash), JUSTIFICATIONS_NAME).into()
61		}
62	}
63}
64
65/// Returns the configuration value to put in
66/// [`sc_network::config::FullNetworkConfiguration`].
67/// For standard protocol name see [`beefy_protocol_name::gossip_protocol_name`].
68pub fn beefy_peers_set_config<
69	B: sp_runtime::traits::Block,
70	N: sc_network::NetworkBackend<B, <B as sp_runtime::traits::Block>::Hash>,
71>(
72	gossip_protocol_name: sc_network::ProtocolName,
73	metrics: sc_network::service::NotificationMetrics,
74	peer_store_handle: std::sync::Arc<dyn sc_network::peer_store::PeerStoreProvider>,
75) -> (N::NotificationProtocolConfig, Box<dyn sc_network::NotificationService>) {
76	let (cfg, notification_service) = N::notification_config(
77		gossip_protocol_name,
78		Vec::new(),
79		1024 * 1024,
80		None,
81		sc_network::config::SetConfig {
82			in_peers: 25,
83			out_peers: 25,
84			reserved_nodes: Vec::new(),
85			non_reserved_mode: sc_network::config::NonReservedPeerMode::Accept,
86		},
87		metrics,
88		peer_store_handle,
89	);
90	(cfg, notification_service)
91}
92
93// cost scalars for reporting peers.
94mod cost {
95	use sc_network::ReputationChange as Rep;
96	// Message that's for an outdated round.
97	pub(super) const OUTDATED_MESSAGE: Rep = Rep::new(-50, "BEEFY: Past message");
98	// Message that's from the future relative to our current set-id.
99	pub(super) const FUTURE_MESSAGE: Rep = Rep::new(-100, "BEEFY: Future message");
100	// Vote message containing bad signature.
101	pub(super) const BAD_SIGNATURE: Rep = Rep::new(-100, "BEEFY: Bad signature");
102	// Message received with vote from voter not in validator set.
103	pub(super) const UNKNOWN_VOTER: Rep = Rep::new(-150, "BEEFY: Unknown voter");
104	// Message containing invalid proof.
105	pub(super) const INVALID_PROOF: Rep = Rep::new(-5000, "BEEFY: Invalid commit");
106	// Reputation cost per signature checked for invalid proof.
107	pub(super) const PER_SIGNATURE_CHECKED: i32 = -25;
108	// Reputation cost per byte for un-decodable message.
109	pub(super) const PER_UNDECODABLE_BYTE: i32 = -5;
110	// On-demand request was refused by peer.
111	pub(super) const REFUSAL_RESPONSE: Rep = Rep::new(-100, "BEEFY: Proof request refused");
112	// On-demand request for a proof that can't be found in the backend.
113	pub(super) const UNKNOWN_PROOF_REQUEST: Rep = Rep::new(-150, "BEEFY: Unknown proof request");
114}
115
116// benefit scalars for reporting peers.
117mod benefit {
118	use sc_network::ReputationChange as Rep;
119	pub(super) const VOTE_MESSAGE: Rep = Rep::new(100, "BEEFY: Round vote message");
120	pub(super) const NOT_INTERESTED: Rep = Rep::new(10, "BEEFY: Not interested in round");
121	pub(super) const VALIDATED_PROOF: Rep = Rep::new(100, "BEEFY: Justification");
122}
123
124#[cfg(test)]
125mod tests {
126	use super::*;
127
128	use sp_core::H256;
129
130	#[test]
131	fn beefy_protocols_names() {
132		use beefy_protocol_name::{gossip_protocol_name, justifications_protocol_name};
133		// Create protocol name using random genesis hash.
134		let genesis_hash = H256::random();
135		let genesis_hex = array_bytes::bytes2hex("", genesis_hash);
136
137		let expected_gossip_name = format!("/{}/beefy/2", genesis_hex);
138		let gossip_proto_name = gossip_protocol_name(&genesis_hash, None);
139		assert_eq!(gossip_proto_name.to_string(), expected_gossip_name);
140
141		let expected_justif_name = format!("/{}/beefy/justifications/1", genesis_hex);
142		let justif_proto_name = justifications_protocol_name(&genesis_hash, None);
143		assert_eq!(justif_proto_name.to_string(), expected_justif_name);
144
145		// Create protocol name using hardcoded genesis hash. Verify exact representation.
146		let genesis_hash = [
147			50, 4, 60, 123, 58, 106, 216, 246, 194, 188, 139, 193, 33, 212, 202, 171, 9, 55, 123,
148			94, 8, 43, 12, 251, 187, 57, 173, 19, 188, 74, 205, 147,
149		];
150		let genesis_hex = "32043c7b3a6ad8f6c2bc8bc121d4caab09377b5e082b0cfbbb39ad13bc4acd93";
151
152		let expected_gossip_name = format!("/{}/beefy/2", genesis_hex);
153		let gossip_proto_name = gossip_protocol_name(&genesis_hash, None);
154		assert_eq!(gossip_proto_name.to_string(), expected_gossip_name);
155
156		let expected_justif_name = format!("/{}/beefy/justifications/1", genesis_hex);
157		let justif_proto_name = justifications_protocol_name(&genesis_hash, None);
158		assert_eq!(justif_proto_name.to_string(), expected_justif_name);
159	}
160}
sc_consensus_beefy/communication/mod.rs

sc_consensus_beefy/communication/
mod.rs
