Move BEEFY code to consensus (#13484)

* Move beefy primitives to consensus dir
* Move beefy gadget to client consensus folder
* Rename beefy crates

substrate/client/consensus/beefy/src/communication/notification.rs

@@ -0,0 +1,55 @@
+// 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/>.
+
+use sc_utils::notification::{NotificationSender, NotificationStream, TracingKeyStr};
+use sp_runtime::traits::Block as BlockT;
+
+use crate::justification::BeefyVersionedFinalityProof;
+
+/// The sending half of the notifications channel(s) used to send
+/// notifications about best BEEFY block from the gadget side.
+pub type BeefyBestBlockSender<Block> = NotificationSender<<Block as BlockT>::Hash>;
+
+/// The receiving half of a notifications channel used to receive
+/// notifications about best BEEFY blocks determined on the gadget side.
+pub type BeefyBestBlockStream<Block> =
+	NotificationStream<<Block as BlockT>::Hash, BeefyBestBlockTracingKey>;
+
+/// The sending half of the notifications channel(s) used to send notifications
+/// about versioned finality proof generated at the end of a BEEFY round.
+pub type BeefyVersionedFinalityProofSender<Block> =
+	NotificationSender<BeefyVersionedFinalityProof<Block>>;
+
+/// The receiving half of a notifications channel used to receive notifications
+/// about versioned finality proof generated at the end of a BEEFY round.
+pub type BeefyVersionedFinalityProofStream<Block> =
+	NotificationStream<BeefyVersionedFinalityProof<Block>, BeefyVersionedFinalityProofTracingKey>;
+
+/// Provides tracing key for BEEFY best block stream.
+#[derive(Clone)]
+pub struct BeefyBestBlockTracingKey;
+impl TracingKeyStr for BeefyBestBlockTracingKey {
+	const TRACING_KEY: &'static str = "mpsc_beefy_best_block_notification_stream";
+}
+
+/// Provides tracing key for BEEFY versioned finality proof stream.
+#[derive(Clone)]
+pub struct BeefyVersionedFinalityProofTracingKey;
+impl TracingKeyStr for BeefyVersionedFinalityProofTracingKey {
+	const TRACING_KEY: &'static str = "mpsc_beefy_versioned_finality_proof_notification_stream";
+}