Daemon RPC: /getblocks.bin return chain's top_block_hash in resp

8 files changed, 18 insertions, 10 deletions

diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 3a7575119..a33363be7 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -2765,7 +2765,7 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
 // find split point between ours and foreign blockchain (or start at
 // blockchain height <req_start_block>), and return up to max_count FULL
 // blocks by reference.
-bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const
+bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, crypto::hash& top_hash, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -2774,7 +2774,9 @@ bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, cons
   if(req_start_block > 0)
   {
     // if requested height is higher than our chain, return false -- we can't help
-    if (req_start_block >= m_db->height())
+    top_hash = m_db->top_block_hash(&total_height);
+    ++total_height;
+    if (req_start_block >= total_height)
     {
       return false;
     }
@@ -2789,7 +2791,8 @@ bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, cons
   }
 
   db_rtxn_guard rtxn_guard(m_db);
-  total_height = get_current_blockchain_height();
+  top_hash = m_db->top_block_hash(&total_height);
+  ++total_height;
   blocks.reserve(std::min(std::min(max_block_count, (size_t)10000), (size_t)(total_height - start_height)));
   CHECK_AND_ASSERT_MES(m_db->get_blocks_from(start_height, 3, max_block_count, max_tx_count, FIND_BLOCKCHAIN_SUPPLEMENT_MAX_SIZE, blocks, pruned, true, get_miner_tx_hash),
       false, "Error getting blocks");
diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index 2249d8cb2..1a21275fc 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -485,6 +485,7 @@ namespace cryptonote
      * @param qblock_ids the foreign chain's "short history" (see get_short_chain_history)
      * @param blocks return-by-reference the blocks and their transactions
      * @param total_height return-by-reference our current blockchain height
+     * @param top_hash return-by-reference top block hash
      * @param start_height return-by-reference the height of the first block returned
      * @param pruned whether to return full or pruned tx blobs
      * @param max_block_count the max number of blocks to get
@@ -492,7 +493,7 @@ namespace cryptonote
      *
      * @return true if a block found in common or req_start_block specified, else false
      */
-    bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const;
+    bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, crypto::hash& top_hash, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const;
 
     /**
      * @brief retrieves a set of blocks and their transactions, and possibly other transactions
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index a5a59c892..53abd8bfb 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -1488,9 +1488,9 @@ namespace cryptonote
     return m_blockchain_storage.find_blockchain_supplement(qblock_ids, clip_pruned, resp);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const
+  bool core::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, crypto::hash& top_hash, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const
   {
-    return m_blockchain_storage.find_blockchain_supplement(req_start_block, qblock_ids, blocks, total_height, start_height, pruned, get_miner_tx_hash, max_block_count, max_tx_count);
+    return m_blockchain_storage.find_blockchain_supplement(req_start_block, qblock_ids, blocks, total_height, top_hash, start_height, pruned, get_miner_tx_hash, max_block_count, max_tx_count);
   }
   //-----------------------------------------------------------------------------------------------
   bool core::get_outs(const COMMAND_RPC_GET_OUTPUTS_BIN::request& req, COMMAND_RPC_GET_OUTPUTS_BIN::response& res) const
diff --git a/src/cryptonote_core/cryptonote_core.h b/src/cryptonote_core/cryptonote_core.h
index 8108dfae0..a0ac22505 100644
--- a/src/cryptonote_core/cryptonote_core.h
+++ b/src/cryptonote_core/cryptonote_core.h
@@ -597,7 +597,7 @@ namespace cryptonote
       *
       * @note see Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::vector<std::pair<cryptonote::blobdata, std::vector<transaction> > >&, uint64_t&, uint64_t&, size_t) const
       */
-     bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const;
+     bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, crypto::hash& top_hash, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_block_count, size_t max_tx_count) const;
 
      /**
       * @copydoc Blockchain::get_tx_outputs_gindexs
diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 16d66e79d..92948b6d1 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -711,6 +711,7 @@ namespace cryptonote
         {
           res.start_height = 0;
           res.current_height = last_block_height + 1;
+          res.top_block_hash = last_block_hash;
           res.status = CORE_RPC_STATUS_OK;
           return true;
         }
@@ -730,7 +731,7 @@ namespace cryptonote
       }
 
       std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > > bs;
-      if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, bs, res.current_height, res.start_height, req.prune, !req.no_miner_tx, max_blocks, COMMAND_RPC_GET_BLOCKS_FAST_MAX_TX_COUNT))
+      if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, bs, res.current_height, res.top_block_hash, res.start_height, req.prune, !req.no_miner_tx, max_blocks, COMMAND_RPC_GET_BLOCKS_FAST_MAX_TX_COUNT))
       {
         res.status = "Failed";
         add_host_fail(ctx);
diff --git a/src/rpc/core_rpc_server_commands_defs.h b/src/rpc/core_rpc_server_commands_defs.h
index c634b8957..46b17bae9 100644
--- a/src/rpc/core_rpc_server_commands_defs.h
+++ b/src/rpc/core_rpc_server_commands_defs.h
@@ -88,7 +88,7 @@ namespace cryptonote
 // advance which version they will stop working with
 // Don't go over 32767 for any of these
 #define CORE_RPC_VERSION_MAJOR 3
-#define CORE_RPC_VERSION_MINOR 14
+#define CORE_RPC_VERSION_MINOR 15
 #define MAKE_CORE_RPC_VERSION(major,minor) (((major)<<16)|(minor))
 #define CORE_RPC_VERSION MAKE_CORE_RPC_VERSION(CORE_RPC_VERSION_MAJOR, CORE_RPC_VERSION_MINOR)
 
@@ -232,6 +232,7 @@ namespace cryptonote
       std::vector<block_complete_entry> blocks;
       uint64_t    start_height;
       uint64_t    current_height;
+      crypto::hash top_block_hash;
       std::vector<block_output_indices> output_indices;
       uint64_t    daemon_time;
       uint8_t     pool_info_extent;
@@ -244,6 +245,7 @@ namespace cryptonote
         KV_SERIALIZE(blocks)
         KV_SERIALIZE(start_height)
         KV_SERIALIZE(current_height)
+        KV_SERIALIZE_VAL_POD_AS_BLOB_OPT(top_block_hash, crypto::null_hash)
         KV_SERIALIZE(output_indices)
         KV_SERIALIZE_OPT(daemon_time, (uint64_t) 0)
         KV_SERIALIZE_OPT(pool_info_extent, (uint8_t) 0)
diff --git a/src/rpc/daemon_handler.cpp b/src/rpc/daemon_handler.cpp
index 4712de134..ef767ffbc 100644
--- a/src/rpc/daemon_handler.cpp
+++ b/src/rpc/daemon_handler.cpp
@@ -128,7 +128,7 @@ namespace rpc
   {
     std::vector<std::pair<std::pair<blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, blobdata> > > > blocks;
 
-    if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, blocks, res.current_height, res.start_height, req.prune, true, COMMAND_RPC_GET_BLOCKS_FAST_MAX_BLOCK_COUNT, COMMAND_RPC_GET_BLOCKS_FAST_MAX_TX_COUNT))
+    if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, blocks, res.current_height, res.top_block_hash, res.start_height, req.prune, true, COMMAND_RPC_GET_BLOCKS_FAST_MAX_BLOCK_COUNT, COMMAND_RPC_GET_BLOCKS_FAST_MAX_TX_COUNT))
     {
       res.status = Message::STATUS_FAILED;
       res.error_details = "core::find_blockchain_supplement() returned false";
diff --git a/src/rpc/daemon_messages.h b/src/rpc/daemon_messages.h
index d4b55f8fd..f4e4d00f7 100644
--- a/src/rpc/daemon_messages.h
+++ b/src/rpc/daemon_messages.h
@@ -97,6 +97,7 @@ BEGIN_RPC_MESSAGE_CLASS(GetBlocksFast);
     RPC_MESSAGE_MEMBER(std::vector<cryptonote::rpc::block_with_transactions>, blocks);
     RPC_MESSAGE_MEMBER(uint64_t, start_height);
     RPC_MESSAGE_MEMBER(uint64_t, current_height);
+    RPC_MESSAGE_MEMBER(crypto::hash, top_block_hash);
     RPC_MESSAGE_MEMBER(std::vector<cryptonote::rpc::block_output_indices>, output_indices);
   END_RPC_MESSAGE_RESPONSE;
 END_RPC_MESSAGE_CLASS;