State machine crate and rust impl of executor (#17)

* Executor.

* Rust contracts implementation.

* Add documentation and fix transfer data.

* Fix auth contract interface.

* Add some executor tests.

* Validator set contract.

substrate/primitives/src/contract.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/>.
+
+//! Contract execution data.
+
+use bytes;
+
+/// Contract call data.
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct CallData(#[serde(with="bytes")] pub Vec<u8>);
+
+/// Contract output data.
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct OutData(#[serde(with="bytes")] pub Vec<u8>);

substrate/primitives/src/lib.rs

@@ -41,6 +41,7 @@ extern crate pretty_assertions;
 
 mod bytes;
 pub mod block;
+pub mod contract;
 pub mod hash;
 pub mod parachain;
 pub mod uint;