Repot and fix a ser/de bug.

substrate/wasm-runtime/polkadot/src/primitives/digest.rs

@@ -0,0 +1,27 @@
+// Copyright 2017 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot 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.
+
+// Polkadot 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 Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Digest type.
+
+use runtime_support::prelude::*;
+
+#[derive(Clone, Default)]
+#[cfg_attr(feature = "with-std", derive(PartialEq, Debug))]
+/// The digest of a block, useful for light-clients.
+pub struct Digest {
+	/// All logs that have happened in the block.
+	pub logs: Vec<Vec<u8>>,
+}