Network sync refactoring (part 6) (#11940)

* Extract `NetworkKVProvider` trait in `sc-authority-discovery` and remove unnecessary dependency * Extract `NetworkSyncForkRequest` trait in `sc-finality-grandpa` * Relax requirements on `SyncOracle` trait, remove extra native methods from `NetworkService` that are already provided by trait impls * Move `NetworkSigner` trait from `sc-authority-discovery` into `sc-network-common` and de-duplicate methods on `NetworkService` * Move `NetworkKVProvider` trait from `sc-authority-discovery` into `sc-network-common` and de-duplicate methods on `NetworkService` * Minimize `sc-authority-discovery` dependency on `sc-network` * Move `NetworkSyncForkRequest` trait from `sc-finality-grandpa` to `sc-network-common` and de-duplicate methods in `NetworkService` * Extract `NetworkStatusProvider` trait and de-duplicate methods on `NetworkService` * Extract `NetworkPeers` trait and de-duplicate methods on `NetworkService` * Extract `NetworkEventStream` trait and de-duplicate methods on `NetworkService` * Move more methods from `NetworkService` into `NetworkPeers` trait * Move `NetworkStateInfo` trait into `sc-network-common` * Extract `NetworkNotification` trait and de-duplicate methods on `NetworkService` * Extract `NetworkRequest` trait and de-duplicate methods on `NetworkService` * Remove `NetworkService::local_peer_id()`, it is already provided by `NetworkStateInfo` impl * Extract `NetworkTransaction` trait and de-duplicate methods on `NetworkService` * Extract `NetworkBlock` trait and de-duplicate methods on `NetworkService` * Remove dependencies on `NetworkService` from most of the methods of `sc-service` * Address simple review comments
2026-06-12 08:51:09 +00:00 · 2022-08-09 21:28:32 +03:00
parent 9c56e79c43
commit a685582bfd
49 changed files with 1889 additions and 1029 deletions
@@ -0,0 +1,53 @@
+// This file is part of Substrate.
+//
+// Copyright (C) 2017-2022 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/>.
+//
+// If you read this, you are very thorough, congratulations.
+
+use libp2p::{
+	identity::{error::SigningError, Keypair, PublicKey},
+	PeerId,
+};
+
+/// A result of signing a message with a network identity. Since `PeerId` is potentially a hash of a
+/// `PublicKey`, you need to reveal the `PublicKey` next to the signature, so the verifier can check
+/// if the signature was made by the entity that controls a given `PeerId`.
+pub struct Signature {
+	/// The public key derived from the network identity that signed the message.
+	pub public_key: PublicKey,
+	/// The actual signature made for the message signed.
+	pub bytes: Vec<u8>,
+}
+
+impl Signature {
+	/// Create a signature for a message with a given network identity.
+	pub fn sign_message(
+		message: impl AsRef<[u8]>,
+		keypair: &Keypair,
+	) -> Result<Self, SigningError> {
+		let public_key = keypair.public();
+		let bytes = keypair.sign(message.as_ref())?;
+		Ok(Self { public_key, bytes })
+	}
+
+	/// Verify whether the signature was made for the given message by the entity that controls the
+	/// given `PeerId`.
+	pub fn verify(&self, message: impl AsRef<[u8]>, peer_id: &PeerId) -> bool {
+		*peer_id == self.public_key.to_peer_id() &&
+			self.public_key.verify(message.as_ref(), &self.bytes)
+	}
+}