feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

substrate/client/consensus/epochs/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "sc-consensus-epochs"
+version = "0.33.0"
+authors.workspace = true
+description = "Generic epochs-based utilities for consensus"
+edition.workspace = true
+license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
+homepage.workspace = true
+repository.workspace = true
+readme = "README.md"
+
+[lints]
+workspace = true
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dependencies]
+codec = { features = ["derive"], workspace = true, default-features = true }
+fork-tree = { workspace = true, default-features = true }
+sc-client-api = { workspace = true, default-features = true }
+sc-consensus = { workspace = true, default-features = true }
+sp-blockchain = { workspace = true, default-features = true }
+sp-runtime = { workspace = true, default-features = true }
+
+[features]
+runtime-benchmarks = [
+	"sc-client-api/runtime-benchmarks",
+	"sc-consensus/runtime-benchmarks",
+	"sp-blockchain/runtime-benchmarks",
+	"sp-runtime/runtime-benchmarks",
+]

substrate/client/consensus/epochs/README.md

@@ -0,0 +1,3 @@
+Generic utilities for epoch-based consensus engines.
+
+License: GPL-3.0-or-later WITH Classpath-exception-2.0

substrate/client/consensus/epochs/src/migration.rs

@@ -0,0 +1,80 @@
+// 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/>.
+
+//! Migration types for epoch changes.
+
+use crate::{Epoch, EpochChanges, PersistedEpoch, PersistedEpochHeader};
+use codec::{Decode, Encode};
+use fork_tree::ForkTree;
+use sp_runtime::traits::{Block as BlockT, NumberFor};
+use std::collections::BTreeMap;
+
+/// Legacy definition of epoch changes.
+#[derive(Clone, Encode, Decode)]
+pub struct EpochChangesV0<Hash, Number, E: Epoch> {
+	inner: ForkTree<Hash, Number, PersistedEpoch<E>>,
+}
+
+/// Legacy definition of epoch changes.
+#[derive(Clone, Encode, Decode)]
+pub struct EpochChangesV1<Hash, Number, E: Epoch> {
+	inner: ForkTree<Hash, Number, PersistedEpochHeader<E>>,
+	epochs: BTreeMap<(Hash, Number), PersistedEpoch<E>>,
+}
+
+/// Type alias for v0 definition of epoch changes.
+pub type EpochChangesV0For<Block, Epoch> =
+	EpochChangesV0<<Block as BlockT>::Hash, NumberFor<Block>, Epoch>;
+/// Type alias for v1 and v2 definition of epoch changes.
+pub type EpochChangesV1For<Block, Epoch> =
+	EpochChangesV1<<Block as BlockT>::Hash, NumberFor<Block>, Epoch>;
+
+impl<Hash, Number, E: Epoch> EpochChangesV0<Hash, Number, E>
+where
+	Hash: PartialEq + Ord + Copy,
+	Number: Ord + Copy,
+{
+	/// Create a new value of this type from raw.
+	pub fn from_raw(inner: ForkTree<Hash, Number, PersistedEpoch<E>>) -> Self {
+		Self { inner }
+	}
+
+	/// Migrate the type into current epoch changes definition.
+	pub fn migrate(self) -> EpochChanges<Hash, Number, E> {
+		let mut epochs = BTreeMap::new();
+
+		let inner = self.inner.map(&mut |hash, number, data| {
+			let header = PersistedEpochHeader::from(&data);
+			epochs.insert((*hash, *number), data);
+			header
+		});
+
+		EpochChanges { inner, epochs }
+	}
+}
+
+impl<Hash, Number, E: Epoch> EpochChangesV1<Hash, Number, E>
+where
+	Hash: PartialEq + Ord + Copy,
+	Number: Ord + Copy,
+{
+	/// Migrate the type into current epoch changes definition.
+	pub fn migrate(self) -> EpochChanges<Hash, Number, E> {
+		EpochChanges { inner: self.inner, epochs: self.epochs }
+	}
+}