rpc: fix get_block_hashes.bin from wallet on pruned blockchain

We want to get all blocks here, even pruned ones

src/cryptonote_core/blockchain.cpp

@@ -2284,7 +2284,7 @@ bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container
 // Find the split point between us and foreign blockchain and return
 // (by reference) the most recent common block hash along with up to
 // BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT additional (more recent) hashes.
-bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::vector<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const
+bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::vector<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height, bool clip_pruned) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -2297,9 +2297,13 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
 
   m_db->block_txn_start(true);
   current_height = get_current_blockchain_height();
-  const uint32_t pruning_seed = get_blockchain_pruning_seed();
-  start_height = tools::get_next_unpruned_block_height(start_height, current_height, pruning_seed);
-  uint64_t stop_height = tools::get_next_pruned_block_height(start_height, current_height, pruning_seed);
+  uint64_t stop_height = current_height;
+  if (clip_pruned)
+  {
+    const uint32_t pruning_seed = get_blockchain_pruning_seed();
+    start_height = tools::get_next_unpruned_block_height(start_height, current_height, pruning_seed);
+    stop_height = tools::get_next_pruned_block_height(start_height, current_height, pruning_seed);
+  }
   size_t count = 0;
   hashes.reserve(std::min((size_t)(stop_height - start_height), (size_t)BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT));
   for(size_t i = start_height; i < stop_height && count < BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT; i++, count++)
@@ -2316,7 +2320,7 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
 
-  bool result = find_blockchain_supplement(qblock_ids, resp.m_block_ids, resp.start_height, resp.total_height);
+  bool result = find_blockchain_supplement(qblock_ids, resp.m_block_ids, resp.start_height, resp.total_height, true);
   if (result)
   {
     cryptonote::difficulty_type wide_cumulative_difficulty = m_db->get_block_cumulative_difficulty(resp.total_height - 1);

src/cryptonote_core/blockchain.h

@@ -394,10 +394,11 @@ namespace cryptonote
      * @param hashes the hashes to be returned, return-by-reference
      * @param start_height the start height, return-by-reference
      * @param current_height the current blockchain height, return-by-reference
+     * @param clip_pruned whether to constrain results to unpruned data
      *
      * @return true if a block found in common, else false
      */
-    bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::vector<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const;
+    bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::vector<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height, bool clip_pruned) const;
 
     /**
      * @brief get recent block hashes for a foreign chain

src/rpc/core_rpc_server.cpp

@@ -432,17 +432,12 @@ namespace cryptonote
     if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_HASHES_FAST>(invoke_http_mode::BIN, "/gethashes.bin", req, res, r))
       return r;
 
-    NOTIFY_RESPONSE_CHAIN_ENTRY::request resp;
-
-    resp.start_height = req.start_height;
-    if(!m_core.find_blockchain_supplement(req.block_ids, resp))
+    res.start_height = req.start_height;
+    if(!m_core.get_blockchain_storage().find_blockchain_supplement(req.block_ids, res.m_block_ids, res.start_height, res.current_height, false))
     {
       res.status = "Failed";
       return false;
     }
-    res.current_height = resp.total_height;
-    res.start_height = resp.start_height;
-    res.m_block_ids = std::move(resp.m_block_ids);
 
     res.status = CORE_RPC_STATUS_OK;
     return true;

src/rpc/daemon_handler.cpp

@@ -141,7 +141,7 @@ namespace rpc
 
     auto& chain = m_core.get_blockchain_storage();
 
-    if (!chain.find_blockchain_supplement(req.known_hashes, res.hashes, res.start_height, res.current_height))
+    if (!chain.find_blockchain_supplement(req.known_hashes, res.hashes, res.start_height, res.current_height, false))
     {
       res.status = Message::STATUS_FAILED;
       res.error_details = "Blockchain::find_blockchain_supplement() returned false";