Adds validate_block support for runtime

cumulus/runtime/src/lib.rs

@@ -0,0 +1,52 @@
+// Copyright 2019 Parity Technologies (UK) Ltd.
+// This file is part of Cumulus.
+
+// Cumulus 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.
+
+// Cumulus 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 Cumulus.  If not, see <http://www.gnu.org/licenses/>.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use rstd::{vec::Vec, collections::btree_map::BTreeMap};
+use codec::{Encode, Decode};
+use runtime_primitives::traits::Block as BlockT;
+
+pub mod validate_block;
+
+type WitnessData = BTreeMap<Vec<u8>, Vec<u8>>;
+
+/// The parachain block that is created on a collator and validated by a validator.
+#[derive(Encode, Decode)]
+struct ParachainBlock<B: BlockT> {
+	extrinsics: Vec<<B as BlockT>::Extrinsic>,
+	/// The data that is required to emulate the storage accesses executed by all extrinsics.
+	witness_data: WitnessData,
+}
+
+impl<B: BlockT> ParachainBlock<B> {
+	#[cfg(test)]
+	fn new(extrinsics: Vec<<B as BlockT>::Extrinsic>, witness_data: WitnessData) -> Self {
+		Self {
+			extrinsics,
+			witness_data,
+		}
+	}
+}
+
+impl<B: BlockT> Default for ParachainBlock<B> {
+	fn default() -> Self {
+		Self {
+			extrinsics: Vec::default(),
+			witness_data: BTreeMap::default(),
+		}
+	}
+}