Add consensus gate - interface for ordering transactions in blocks

irohad/network/consensus_gate.hpp

@@ -0,0 +1,49 @@
+/**
+ * Copyright Soramitsu Co., Ltd. 2017 All Rights Reserved.
+ * http://soramitsu.co.jp
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef IROHA_CONSENSUS_GATE_HPP
+#define IROHA_CONSENSUS_GATE_HPP
+
+#include <rxcpp/rx.hpp>
+#include <model/block.hpp>
+
+namespace iroha {
+  namespace network {
+
+    /**
+     * Public api of consensus module
+     */
+    class ConsensusGate {
+     public:
+
+      /**
+       * Providing data for consensus for voting
+       */
+      virtual void vote(model::Block) = 0;
+
+      /**
+       * Emit committed blocks
+       * Note: committed block may be not satisfy for top block in ledger
+       * because synchronization reasons
+       */
+      virtual rxcpp::observable <model::Block> on_commit() = 0;
+
+      virtual ~ConsensusGate() = default;
+    };
+  } // namespace network
+} // namespace iroha
+#endif //IROHA_CONSENSUS_GATE_HPP

irohad/network/impl/peer_communication_service.cpp

@@ -15,4 +15,5 @@ limitations under the License.
 */
 
 #include <network/peer_communication_service.hpp>
+#include <network/consensus_gate.hpp>