referrerpolicy=no-referrer-when-downgrade
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

//! Communication streams for the BEEFY networking protocols.

pub mod notification;
pub mod request_response;

pub(crate) mod gossip;
pub(crate) mod peers;

pub(crate) mod beefy_protocol_name {
	use array_bytes::bytes2hex;
	use sc_network::ProtocolName;

	/// BEEFY votes gossip protocol name suffix.
	const GOSSIP_NAME: &str = "/beefy/2";
	/// BEEFY justifications protocol name suffix.
	const JUSTIFICATIONS_NAME: &str = "/beefy/justifications/1";

	/// Name of the votes gossip protocol used by BEEFY.
	///
	/// Must be registered towards the networking in order for BEEFY voter to properly function.
	pub fn gossip_protocol_name<Hash: AsRef<[u8]>>(
		genesis_hash: Hash,
		fork_id: Option<&str>,
	) -> ProtocolName {
		let genesis_hash = genesis_hash.as_ref();
		if let Some(fork_id) = fork_id {
			format!("/{}/{}{}", bytes2hex("", genesis_hash), fork_id, GOSSIP_NAME).into()
		} else {
			format!("/{}{}", bytes2hex("", genesis_hash), GOSSIP_NAME).into()
		}
	}

	/// Name of the BEEFY justifications request-response protocol.
	pub fn justifications_protocol_name<Hash: AsRef<[u8]>>(
		genesis_hash: Hash,
		fork_id: Option<&str>,
	) -> ProtocolName {
		let genesis_hash = genesis_hash.as_ref();
		if let Some(fork_id) = fork_id {
			format!("/{}/{}{}", bytes2hex("", genesis_hash), fork_id, JUSTIFICATIONS_NAME).into()
		} else {
			format!("/{}{}", bytes2hex("", genesis_hash), JUSTIFICATIONS_NAME).into()
		}
	}
}

/// Returns the configuration value to put in
/// [`sc_network::config::FullNetworkConfiguration`].
/// For standard protocol name see [`beefy_protocol_name::gossip_protocol_name`].
pub fn beefy_peers_set_config<
	B: sp_runtime::traits::Block,
	N: sc_network::NetworkBackend<B, <B as sp_runtime::traits::Block>::Hash>,
>(
	gossip_protocol_name: sc_network::ProtocolName,
	metrics: sc_network::service::NotificationMetrics,
	peer_store_handle: std::sync::Arc<dyn sc_network::peer_store::PeerStoreProvider>,
) -> (N::NotificationProtocolConfig, Box<dyn sc_network::NotificationService>) {
	let (cfg, notification_service) = N::notification_config(
		gossip_protocol_name,
		Vec::new(),
		1024 * 1024,
		None,
		sc_network::config::SetConfig {
			in_peers: 25,
			out_peers: 25,
			reserved_nodes: Vec::new(),
			non_reserved_mode: sc_network::config::NonReservedPeerMode::Accept,
		},
		metrics,
		peer_store_handle,
	);
	(cfg, notification_service)
}

// cost scalars for reporting peers.
mod cost {
	use sc_network::ReputationChange as Rep;
	// Message that's for an outdated round.
	pub(super) const OUTDATED_MESSAGE: Rep = Rep::new(-50, "BEEFY: Past message");
	// Message that's from the future relative to our current set-id.
	pub(super) const FUTURE_MESSAGE: Rep = Rep::new(-100, "BEEFY: Future message");
	// Vote message containing bad signature.
	pub(super) const BAD_SIGNATURE: Rep = Rep::new(-100, "BEEFY: Bad signature");
	// Message received with vote from voter not in validator set.
	pub(super) const UNKNOWN_VOTER: Rep = Rep::new(-150, "BEEFY: Unknown voter");
	// Message containing invalid proof.
	pub(super) const INVALID_PROOF: Rep = Rep::new(-5000, "BEEFY: Invalid commit");
	// Reputation cost per signature checked for invalid proof.
	pub(super) const PER_SIGNATURE_CHECKED: i32 = -25;
	// Reputation cost per byte for un-decodable message.
	pub(super) const PER_UNDECODABLE_BYTE: i32 = -5;
	// On-demand request was refused by peer.
	pub(super) const REFUSAL_RESPONSE: Rep = Rep::new(-100, "BEEFY: Proof request refused");
	// On-demand request for a proof that can't be found in the backend.
	pub(super) const UNKNOWN_PROOF_REQUEST: Rep = Rep::new(-150, "BEEFY: Unknown proof request");
}

// benefit scalars for reporting peers.
mod benefit {
	use sc_network::ReputationChange as Rep;
	pub(super) const VOTE_MESSAGE: Rep = Rep::new(100, "BEEFY: Round vote message");
	pub(super) const NOT_INTERESTED: Rep = Rep::new(10, "BEEFY: Not interested in round");
	pub(super) const VALIDATED_PROOF: Rep = Rep::new(100, "BEEFY: Justification");
}

#[cfg(test)]
mod tests {
	use super::*;

	use sp_core::H256;

	#[test]
	fn beefy_protocols_names() {
		use beefy_protocol_name::{gossip_protocol_name, justifications_protocol_name};
		// Create protocol name using random genesis hash.
		let genesis_hash = H256::random();
		let genesis_hex = array_bytes::bytes2hex("", genesis_hash);

		let expected_gossip_name = format!("/{}/beefy/2", genesis_hex);
		let gossip_proto_name = gossip_protocol_name(&genesis_hash, None);
		assert_eq!(gossip_proto_name.to_string(), expected_gossip_name);

		let expected_justif_name = format!("/{}/beefy/justifications/1", genesis_hex);
		let justif_proto_name = justifications_protocol_name(&genesis_hash, None);
		assert_eq!(justif_proto_name.to_string(), expected_justif_name);

		// Create protocol name using hardcoded genesis hash. Verify exact representation.
		let genesis_hash = [
			50, 4, 60, 123, 58, 106, 216, 246, 194, 188, 139, 193, 33, 212, 202, 171, 9, 55, 123,
			94, 8, 43, 12, 251, 187, 57, 173, 19, 188, 74, 205, 147,
		];
		let genesis_hex = "32043c7b3a6ad8f6c2bc8bc121d4caab09377b5e082b0cfbbb39ad13bc4acd93";

		let expected_gossip_name = format!("/{}/beefy/2", genesis_hex);
		let gossip_proto_name = gossip_protocol_name(&genesis_hash, None);
		assert_eq!(gossip_proto_name.to_string(), expected_gossip_name);

		let expected_justif_name = format!("/{}/beefy/justifications/1", genesis_hex);
		let justif_proto_name = justifications_protocol_name(&genesis_hash, None);
		assert_eq!(justif_proto_name.to_string(), expected_justif_name);
	}
}