Add mempool output to daemon via command and RPC

This is for the "print_pool" command and "get_transaction_pool" RPC
method.

Add mempool's spent key images to the results.

src/cryptonote_core/cryptonote_core.cpp

@@ -654,6 +654,11 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
+  bool core::get_pool_transactions_and_spent_keys_info(std::vector<tx_info>& tx_infos, std::vector<spent_key_image_info>& key_image_infos) const
+  {
+    return m_mempool.get_transactions_and_spent_keys_info(tx_infos, key_image_infos);
+  }
+  //-----------------------------------------------------------------------------------------------
   bool core::get_short_chain_history(std::list<crypto::hash>& ids)
   {
     return m_blockchain_storage.get_short_chain_history(ids);

src/cryptonote_core/cryptonote_core.h

@@ -108,6 +108,7 @@ namespace cryptonote
      void set_enforce_dns_checkpoints(bool enforce_dns);
 
      bool get_pool_transactions(std::list<transaction>& txs);
+     bool get_pool_transactions_and_spent_keys_info(std::vector<tx_info>& tx_infos, std::vector<spent_key_image_info>& key_image_infos) const;
      size_t get_pool_transactions_count();
      size_t get_blockchain_total_transactions();
      //bool get_outs(uint64_t amount, std::list<crypto::public_key>& pkeys);

src/cryptonote_core/tx_pool.cpp

@@ -276,6 +276,40 @@ namespace cryptonote
     BOOST_FOREACH(const auto& tx_vt, m_transactions)
       txs.push_back(tx_vt.second.tx);
   }
+  //------------------------------------------------------------------
+  bool tx_memory_pool::get_transactions_and_spent_keys_info(std::vector<tx_info>& tx_infos, std::vector<spent_key_image_info>& key_image_infos) const
+  {
+    CRITICAL_REGION_LOCAL(m_transactions_lock);
+    for (const auto& tx_vt : m_transactions)
+    {
+      tx_info txi;
+      const tx_details& txd = tx_vt.second;
+      txi.id_hash = epee::string_tools::pod_to_hex(tx_vt.first);
+      txi.tx_json = obj_to_json_str(*const_cast<transaction*>(&txd.tx));
+      txi.blob_size = txd.blob_size;
+      txi.fee = txd.fee;
+      txi.kept_by_block = txd.kept_by_block;
+      txi.max_used_block_height = txd.max_used_block_height;
+      txi.max_used_block_id_hash = epee::string_tools::pod_to_hex(txd.max_used_block_id);
+      txi.last_failed_height = txd.last_failed_height;
+      txi.last_failed_id_hash = epee::string_tools::pod_to_hex(txd.last_failed_id);
+      txi.receive_time = txd.receive_time;
+      tx_infos.push_back(txi);
+    }
+
+    for (const key_images_container::value_type& kee : m_spent_key_images) {
+      const crypto::key_image& k_image = kee.first;
+      const std::unordered_set<crypto::hash>& kei_image_set = kee.second;
+      spent_key_image_info ki;
+      ki.id_hash = epee::string_tools::pod_to_hex(k_image);
+      for (const crypto::hash& tx_id_hash : kei_image_set)
+      {
+        ki.txs_hashes.push_back(epee::string_tools::pod_to_hex(tx_id_hash));
+      }
+      key_image_infos.push_back(ki);
+    }
+    return true;
+  }
   //---------------------------------------------------------------------------------
   bool tx_memory_pool::get_transaction(const crypto::hash& id, transaction& tx) const
   {

src/cryptonote_core/tx_pool.h

@@ -43,6 +43,7 @@
 #include "cryptonote_basic_impl.h"
 #include "verification_context.h"
 #include "crypto/hash.h"
+#include "rpc/core_rpc_server_commands_defs.h"
 
 namespace cryptonote
 {
@@ -81,6 +82,7 @@ namespace cryptonote
     bool deinit();
     bool fill_block_template(block &bl, size_t median_size, uint64_t already_generated_coins, size_t &total_size, uint64_t &fee);
     void get_transactions(std::list<transaction>& txs) const;
+    bool get_transactions_and_spent_keys_info(std::vector<tx_info>& tx_infos, std::vector<spent_key_image_info>& key_image_infos) const;
     bool get_transaction(const crypto::hash& h, transaction& tx) const;
     size_t get_transactions_count() const;
     std::string print_pool(bool short_format) const;

src/daemon/rpc_command_executor.cpp

@@ -523,20 +523,58 @@ bool t_rpc_command_executor::print_transaction_pool_long() {
     }
   }
 
-  if (res.transactions.empty())
+  if (res.transactions.empty() && res.spent_key_images.empty())
   {
     tools::msg_writer() << "Pool is empty" << std::endl;
   }
-  for (auto & tx_info : res.transactions)
+  if (! res.transactions.empty())
   {
-    tools::msg_writer() << "id: " << tx_info.id_hash << std::endl
-                        << "blob_size: " << tx_info.blob_size << std::endl
-                        << "fee: " << tx_info.fee << std::endl
-                        << "kept_by_block: " << tx_info.kept_by_block << std::endl
-                        << "max_used_block_height: " << tx_info.max_used_block_height << std::endl
-                        << "max_used_block_id: " << tx_info.max_used_block_id_hash << std::endl
-                        << "last_failed_height: " << tx_info.last_failed_height << std::endl
-                        << "last_failed_id: " << tx_info.last_failed_id_hash << std::endl;
+    tools::msg_writer() << "Transactions: ";
+    for (auto & tx_info : res.transactions)
+    {
+      tools::msg_writer() << "id: " << tx_info.id_hash << std::endl
+                          << tx_info.tx_json << std::endl
+                          << "blob_size: " << tx_info.blob_size << std::endl
+                          << "fee: " << cryptonote::print_money(tx_info.fee) << std::endl
+                          << "kept_by_block: " << (tx_info.kept_by_block ? 'T' : 'F') << std::endl
+                          << "max_used_block_height: " << tx_info.max_used_block_height << std::endl
+                          << "max_used_block_id: " << tx_info.max_used_block_id_hash << std::endl
+                          << "last_failed_height: " << tx_info.last_failed_height << std::endl
+                          << "last_failed_id: " << tx_info.last_failed_id_hash << std::endl;
+    }
+    if (res.spent_key_images.empty())
+    {
+      tools::msg_writer() << "WARNING: Inconsistent pool state - no spent key images";
+    }
+  }
+  if (! res.spent_key_images.empty())
+  {
+    tools::msg_writer() << ""; // one newline
+    tools::msg_writer() << "Spent key images: ";
+    for (const cryptonote::spent_key_image_info& kinfo : res.spent_key_images)
+    {
+      tools::msg_writer() << "key image: " << kinfo.id_hash;
+      if (kinfo.txs_hashes.size() == 1)
+      {
+        tools::msg_writer() << "  tx: " << kinfo.txs_hashes[0];
+      }
+      else if (kinfo.txs_hashes.size() == 0)
+      {
+        tools::msg_writer() << "  WARNING: spent key image has no txs associated";
+      }
+      else
+      {
+        tools::msg_writer() << "  NOTE: key image for multiple txs: " << kinfo.txs_hashes.size();
+        for (const std::string& tx_id : kinfo.txs_hashes)
+        {
+          tools::msg_writer() << "  tx: " << tx_id;
+        }
+      }
+    }
+    if (res.transactions.empty())
+    {
+      tools::msg_writer() << "WARNING: Inconsistent pool state - no transactions";
+    }
   }
 
   return true;
@@ -571,10 +609,9 @@ bool t_rpc_command_executor::print_transaction_pool_short() {
   for (auto & tx_info : res.transactions)
   {
     tools::msg_writer() << "id: " << tx_info.id_hash << std::endl
-                        <<  tx_info.tx_json << std::endl
                         << "blob_size: " << tx_info.blob_size << std::endl
-                        << "fee: " << tx_info.fee << std::endl
-                        << "kept_by_block: " << tx_info.kept_by_block << std::endl
+                        << "fee: " << cryptonote::print_money(tx_info.fee) << std::endl
+                        << "kept_by_block: " << (tx_info.kept_by_block ? 'T' : 'F') << std::endl
                         << "max_used_block_height: " << tx_info.max_used_block_height << std::endl
                         << "max_used_block_id: " << tx_info.max_used_block_id_hash << std::endl
                         << "last_failed_height: " << tx_info.last_failed_height << std::endl

src/rpc/core_rpc_server.cpp

@@ -401,10 +401,8 @@ namespace cryptonote
   //------------------------------------------------------------------------------------------------------------------------------
   bool core_rpc_server::on_get_transaction_pool(const COMMAND_RPC_GET_TRANSACTION_POOL::request& req, COMMAND_RPC_GET_TRANSACTION_POOL::response& res)
   {
-    /*
     CHECK_CORE_BUSY();
-    res.transactions = m_core.transaction_pool_info();
-    */
+    m_core.get_pool_transactions_and_spent_keys_info(res.transactions, res.spent_key_images);
     res.status = CORE_RPC_STATUS_OK;
     return true;
   }

src/rpc/core_rpc_server_commands_defs.h

@@ -619,7 +619,18 @@ namespace cryptonote
       KV_SERIALIZE(receive_time)
     END_KV_SERIALIZE_MAP()
   };
-  
+
+  struct spent_key_image_info
+  {
+    std::string id_hash;
+    std::vector<std::string> txs_hashes;
+
+    BEGIN_KV_SERIALIZE_MAP()
+      KV_SERIALIZE(id_hash)
+      KV_SERIALIZE(txs_hashes)
+    END_KV_SERIALIZE_MAP()
+  };
+
   struct COMMAND_RPC_GET_TRANSACTION_POOL
   {
     struct request
@@ -632,10 +643,12 @@ namespace cryptonote
     {
       std::string status;
       std::vector<tx_info> transactions;
+      std::vector<spent_key_image_info> spent_key_images;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(status)
         KV_SERIALIZE(transactions)
+        KV_SERIALIZE(spent_key_images)
       END_KV_SERIALIZE_MAP()
     };
   };