Fix consensus VoteOther case

irohad/consensus/gate_object.hpp

@@ -7,8 +7,10 @@
 #define CONSENSUS_GATE_OBJECT_HPP
 
 #include <boost/variant.hpp>
-
 #include "consensus/round.hpp"
+#include "cryptography/hash.hpp"
+#include "cryptography/public_key.hpp"
+#include "interfaces/common_objects/types.hpp"
 
 namespace shared_model {
   namespace interface {
@@ -27,7 +29,8 @@ namespace iroha {
 
     /// Network votes for another pair and round
     struct VoteOther {
-      std::shared_ptr<shared_model::interface::Block> block;
+      shared_model::interface::types::PublicKeyCollectionType public_keys;
+      shared_model::interface::types::HashType hash;
       consensus::Round round;
     };
 

irohad/consensus/yac/impl/yac_gate_impl.cpp

@@ -119,8 +119,19 @@ namespace iroha {
               PairValid{block, current_hash_.vote_round});
         }
         log_->info("Voted for another block, waiting for sync");
+        auto public_keys = std::accumulate(
+            msg.votes.begin(),
+            msg.votes.end(),
+            shared_model::interface::types::PublicKeyCollectionType{},
+            [](auto &acc, const auto &vote) {
+              acc.push_back(vote.signature->publicKey());
+              return acc;
+            });
+        auto model_hash = hash_provider_->toModelHash(hash);
         return rxcpp::observable<>::just<GateObject>(
-            VoteOther{current_block_.value(), current_hash_.vote_round});
+            VoteOther{std::move(public_keys),
+                      std::move(model_hash),
+                      current_hash_.vote_round});
       }
 
       rxcpp::observable<YacGateImpl::GateObject> YacGateImpl::handleReject(

irohad/synchronizer/impl/synchronizer_impl.cpp

@@ -37,7 +37,7 @@ namespace iroha {
             this->processNext(msg.block, msg.round);
           },
           [this](const consensus::VoteOther &msg) {
-            this->processDifferent(msg.block, msg.round);
+            this->processDifferent(msg.public_keys, msg.hash, msg.round);
           },
           [this](const consensus::ProposalReject &msg) {
             notifier_.get_subscriber().on_next(SynchronizationEvent{
@@ -63,17 +63,16 @@ namespace iroha {
     }
 
     SynchronizationEvent SynchronizerImpl::downloadMissingBlocks(
-        std::shared_ptr<shared_model::interface::Block> commit_message,
+        const shared_model::interface::types::PublicKeyCollectionType
+            &public_keys,
+        const shared_model::interface::types::HashType &hash,
         const consensus::Round &round,
         std::unique_ptr<ametsuchi::MutableStorage> storage) {
-      auto hash = commit_message->hash();
-
       // while blocks are not loaded and not committed
       while (true) {
         // TODO andrei 17.10.18 IR-1763 Add delay strategy for loading blocks
-        for (const auto &peer_signature : commit_message->signatures()) {
-          auto network_chain = block_loader_->retrieveBlocks(
-              shared_model::crypto::PublicKey(peer_signature.publicKey()));
+        for (const auto &public_key : public_keys) {
+          auto network_chain = block_loader_->retrieveBlocks(public_key);
 
           std::vector<std::shared_ptr<shared_model::interface::Block>> blocks;
           network_chain.as_blocking().subscribe(
@@ -130,7 +129,9 @@ namespace iroha {
     }
 
     void SynchronizerImpl::processDifferent(
-        std::shared_ptr<shared_model::interface::Block> commit_message,
+        const shared_model::interface::types::PublicKeyCollectionType
+            &public_keys,
+        const shared_model::interface::types::HashType &hash,
         const consensus::Round &round) {
       log_->info("at handleDifferent");
       auto opt_storage = getStorage();
@@ -140,7 +141,7 @@ namespace iroha {
       std::unique_ptr<ametsuchi::MutableStorage> storage =
           std::move(opt_storage.value());
       SynchronizationEvent result =
-          downloadMissingBlocks(commit_message, round, std::move(storage));
+          downloadMissingBlocks(public_keys, hash, round, std::move(storage));
       notifier_.get_subscriber().on_next(result);
     }
 

irohad/synchronizer/impl/synchronizer_impl.hpp

@@ -6,11 +6,12 @@
 #ifndef IROHA_SYNCHRONIZER_IMPL_HPP
 #define IROHA_SYNCHRONIZER_IMPL_HPP
 
+#include "synchronizer/synchronizer.hpp"
+
 #include "ametsuchi/mutable_factory.hpp"
 #include "logger/logger.hpp"
 #include "network/block_loader.hpp"
 #include "network/consensus_gate.hpp"
-#include "synchronizer/synchronizer.hpp"
 #include "validation/chain_validator.hpp"
 
 namespace iroha {
@@ -35,15 +36,19 @@ namespace iroha {
        * apply the missing blocks
        */
       SynchronizationEvent downloadMissingBlocks(
-          std::shared_ptr<shared_model::interface::Block> commit_message,
+          const shared_model::interface::types::PublicKeyCollectionType
+              &public_keys,
+          const shared_model::interface::types::HashType &hash,
           const consensus::Round &round,
           std::unique_ptr<ametsuchi::MutableStorage> storage);
 
       void processNext(
           std::shared_ptr<shared_model::interface::Block> commit_message,
           const consensus::Round &round);
       void processDifferent(
-          std::shared_ptr<shared_model::interface::Block> commit_message,
+          const shared_model::interface::types::PublicKeyCollectionType
+              &public_keys,
+          const shared_model::interface::types::HashType &hash,
           const consensus::Round &round);
 
       boost::optional<std::unique_ptr<ametsuchi::MutableStorage>> getStorage();

test/module/irohad/consensus/yac/yac_gate_test.cpp

@@ -3,11 +3,12 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include "consensus/yac/impl/yac_gate_impl.hpp"
+
 #include <memory>
 
 #include <rxcpp/rx.hpp>
 #include "consensus/consensus_block_cache.hpp"
-#include "consensus/yac/impl/yac_gate_impl.hpp"
 #include "consensus/yac/storage/yac_proposal_storage.hpp"
 #include "cryptography/crypto_provider/crypto_defaults.hpp"
 #include "framework/specified_visitor.hpp"
@@ -68,18 +69,21 @@ class YacGateTest : public ::testing::Test {
     message.hash = expected_hash;
     message.signature = signature;
     commit_message = CommitMessage({message});
-    expected_commit = rxcpp::observable<>::just(Answer(commit_message));
+    expected_commit = commit_message;
 
-    hash_gate = make_unique<MockHashGate>();
-    peer_orderer = make_unique<MockYacPeerOrderer>();
+    auto hash_gate_ptr = make_unique<MockHashGate>();
+    hash_gate = hash_gate_ptr.get();
+    auto peer_orderer_ptr = make_unique<MockYacPeerOrderer>();
+    peer_orderer = peer_orderer_ptr.get();
     hash_provider = make_shared<MockYacHashProvider>();
     block_creator = make_shared<MockBlockCreator>();
     block_cache = make_shared<ConsensusResultCache>();
-  }
 
-  void init() {
-    gate = std::make_shared<YacGateImpl>(std::move(hash_gate),
-                                         std::move(peer_orderer),
+    EXPECT_CALL(*block_creator, on_block())
+        .WillOnce(Return(block_notifier.get_observable()));
+
+    gate = std::make_shared<YacGateImpl>(std::move(hash_gate_ptr),
+                                         std::move(peer_orderer_ptr),
                                          hash_provider,
                                          block_creator,
                                          block_cache);
@@ -92,10 +96,13 @@ class YacGateTest : public ::testing::Test {
   std::shared_ptr<shared_model::interface::Block> expected_block;
   VoteMessage message;
   CommitMessage commit_message;
-  rxcpp::observable<Answer> expected_commit;
+  Answer expected_commit{commit_message};
+  rxcpp::subjects::subject<std::shared_ptr<shared_model::interface::Block>>
+      block_notifier;
+  rxcpp::subjects::subject<Answer> outcome_notifier;
 
-  unique_ptr<MockHashGate> hash_gate;
-  unique_ptr<MockYacPeerOrderer> peer_orderer;
+  MockHashGate *hash_gate;
+  MockYacPeerOrderer *peer_orderer;
   shared_ptr<MockYacHashProvider> hash_provider;
   shared_ptr<MockBlockCreator> block_creator;
   shared_ptr<ConsensusResultCache> block_cache;
@@ -115,7 +122,8 @@ TEST_F(YacGateTest, YacGateSubscriptionTest) {
   // yac consensus
   EXPECT_CALL(*hash_gate, vote(expected_hash, _)).Times(1);
 
-  EXPECT_CALL(*hash_gate, onOutcome()).WillOnce(Return(expected_commit));
+  EXPECT_CALL(*hash_gate, onOutcome())
+      .WillOnce(Return(outcome_notifier.get_observable()));
 
   // generate order of peers
   EXPECT_CALL(*peer_orderer, getOrdering(_))
@@ -124,11 +132,7 @@ TEST_F(YacGateTest, YacGateSubscriptionTest) {
   // make hash from block
   EXPECT_CALL(*hash_provider, makeHash(_)).WillOnce(Return(expected_hash));
 
-  // make blocks
-  EXPECT_CALL(*block_creator, on_block())
-      .WillOnce(Return(rxcpp::observable<>::just(expected_block)));
-
-  init();
+  block_notifier.get_subscriber().on_next(expected_block);
 
   // verify that block we voted for is in the cache
   auto cache_block = block_cache->get();
@@ -145,6 +149,8 @@ TEST_F(YacGateTest, YacGateSubscriptionTest) {
     ASSERT_EQ(block, cache_block);
   });
 
+  outcome_notifier.get_subscriber().on_next(expected_commit);
+
   ASSERT_TRUE(gate_wrapper.validate());
 }
 
@@ -165,11 +171,7 @@ TEST_F(YacGateTest, YacGateSubscribtionTestFailCase) {
   // make hash from block
   EXPECT_CALL(*hash_provider, makeHash(_)).WillOnce(Return(expected_hash));
 
-  // make blocks
-  EXPECT_CALL(*block_creator, on_block())
-      .WillOnce(Return(rxcpp::observable<>::just(expected_block)));
-
-  init();
+  block_notifier.get_subscriber().on_next(expected_block);
 }
 
 /**
@@ -179,15 +181,74 @@ TEST_F(YacGateTest, YacGateSubscribtionTestFailCase) {
  */
 TEST_F(YacGateTest, AgreementOnNone) {
   EXPECT_CALL(*hash_gate, vote(_, _)).Times(1);
-  EXPECT_CALL(*block_creator, on_block())
-      .WillOnce(Return(rxcpp::observable<>::empty<
-                       std::shared_ptr<shared_model::interface::Block>>()));
+
   EXPECT_CALL(*peer_orderer, getOrdering(_))
       .WillOnce(Return(ClusterOrdering::create({mk_peer("fake_node")})));
 
-  init();
-
   ASSERT_EQ(block_cache->get(), nullptr);
+
   gate->vote(boost::none, boost::none, {});
+
   ASSERT_EQ(block_cache->get(), nullptr);
 }
+
+/**
+ * @given yac gate
+ * @when voting for one block @and receiving another
+ * @then yac gate will emit the data of block, for which consensus voted
+ */
+TEST_F(YacGateTest, DifferentCommit) {
+  // make hash from block
+  EXPECT_CALL(*hash_provider, makeHash(_)).WillOnce(Return(expected_hash));
+
+  // generate order of peers
+  EXPECT_CALL(*peer_orderer, getOrdering(_))
+      .WillOnce(Return(ClusterOrdering::create({mk_peer("fake_node")})));
+
+  EXPECT_CALL(*hash_gate, vote(expected_hash, _)).Times(1);
+
+  block_notifier.get_subscriber().on_next(expected_block);
+
+  // create another block, which will be "received", and generate a commit
+  // message with it
+  decltype(expected_block) actual_block = std::make_shared<MockBlock>();
+  Hash actual_hash("actual_hash");
+  PublicKey actual_pubkey("actual_pubkey");
+  auto signature = std::make_shared<MockSignature>();
+  EXPECT_CALL(*signature, publicKey())
+      .WillRepeatedly(ReturnRefOfCopy(actual_pubkey));
+
+  message.hash =
+      YacHash(iroha::consensus::Round{1, 1}, "actual_proposal", "actual_block");
+  message.signature = signature;
+  commit_message = CommitMessage({message});
+  expected_commit = commit_message;
+
+  // yac
+  EXPECT_CALL(*hash_gate, onOutcome())
+      .WillOnce(Return(outcome_notifier.get_observable()));
+
+  // convert yac hash to model hash
+  EXPECT_CALL(*hash_provider, toModelHash(message.hash))
+      .WillOnce(Return(actual_hash));
+
+  // verify that block we voted for is in the cache
+  auto cache_block = block_cache->get();
+  ASSERT_EQ(cache_block, expected_block);
+
+  // verify that yac gate emit expected block
+  auto gate_wrapper = make_test_subscriber<CallExact>(gate->onOutcome(), 1);
+  gate_wrapper.subscribe([actual_hash, actual_pubkey](auto outcome) {
+    auto concete_outcome = boost::get<iroha::consensus::VoteOther>(outcome);
+    auto public_keys = concete_outcome.public_keys;
+    auto hash = concete_outcome.hash;
+
+    ASSERT_EQ(1, public_keys.size());
+    ASSERT_EQ(actual_pubkey, public_keys.front());
+    ASSERT_EQ(hash, actual_hash);
+  });
+
+  outcome_notifier.get_subscriber().on_next(expected_commit);
+
+  ASSERT_TRUE(gate_wrapper.validate());
+}