feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

substrate/client/network/common/src/sync.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/>.
+
+//! Abstract interfaces and data structures related to network sync.
+
+pub mod message;
+
+/// Sync operation mode.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum SyncMode {
+	/// Full block download and verification.
+	Full,
+	/// Download blocks and the latest state.
+	LightState {
+		/// Skip state proof download and verification.
+		skip_proofs: bool,
+		/// Download indexed transactions for recent blocks.
+		storage_chain_mode: bool,
+	},
+	/// Warp sync - verify authority set transitions and the latest state.
+	Warp,
+}
+
+impl SyncMode {
+	/// Returns `true` if `self` is [`Self::Warp`].
+	pub fn is_warp(&self) -> bool {
+		matches!(self, Self::Warp)
+	}
+
+	/// Returns `true` if `self` is [`Self::LightState`].
+	pub fn light_state(&self) -> bool {
+		matches!(self, Self::LightState { .. })
+	}
+}
+
+impl Default for SyncMode {
+	fn default() -> Self {
+		Self::Full
+	}
+}