print_coinbase_tx_sum now supports 128 bits sums

The tail emission will bring the total above 64 bits

src/cryptonote_basic/cryptonote_format_utils.cpp

@@ -996,17 +996,31 @@ namespace cryptonote
     }
   }
   //---------------------------------------------------------------
-  std::string print_money(uint64_t amount, unsigned int decimal_point)
+  static void insert_money_decimal_point(std::string &s, unsigned int decimal_point)
   {
     if (decimal_point == (unsigned int)-1)
       decimal_point = default_decimal_point;
-    std::string s = std::to_string(amount);
     if(s.size() < decimal_point+1)
     {
       s.insert(0, decimal_point+1 - s.size(), '0');
     }
     if (decimal_point > 0)
       s.insert(s.size() - decimal_point, ".");
+  }
+  //---------------------------------------------------------------
+  std::string print_money(uint64_t amount, unsigned int decimal_point)
+  {
+    std::string s = std::to_string(amount);
+    insert_money_decimal_point(s, decimal_point);
+    return s;
+  }
+  //---------------------------------------------------------------
+  std::string print_money(const boost::multiprecision::uint128_t &amount, unsigned int decimal_point)
+  {
+    std::stringstream ss;
+    ss << amount;
+    std::string s = ss.str();
+    insert_money_decimal_point(s, decimal_point);
     return s;
   }
   //---------------------------------------------------------------

src/cryptonote_basic/cryptonote_format_utils.h

@@ -38,6 +38,7 @@
 #include "crypto/crypto.h"
 #include "crypto/hash.h"
 #include <unordered_map>
+#include <boost/multiprecision/cpp_int.hpp>
 
 namespace epee
 {
@@ -139,6 +140,7 @@ namespace cryptonote
   unsigned int get_default_decimal_point();
   std::string get_unit(unsigned int decimal_point = -1);
   std::string print_money(uint64_t amount, unsigned int decimal_point = -1);
+  std::string print_money(const boost::multiprecision::uint128_t &amount, unsigned int decimal_point = -1);
   //---------------------------------------------------------------
   template<class t_object>
   bool t_serializable_object_from_blob(t_object& to, const blobdata& b_blob)

src/cryptonote_core/cryptonote_core.cpp

@@ -1178,10 +1178,10 @@ namespace cryptonote
     return m_mempool.check_for_key_images(key_im, spent);
   }
   //-----------------------------------------------------------------------------------------------
-  std::pair<uint64_t, uint64_t> core::get_coinbase_tx_sum(const uint64_t start_offset, const size_t count)
+  std::pair<boost::multiprecision::uint128_t, boost::multiprecision::uint128_t> core::get_coinbase_tx_sum(const uint64_t start_offset, const size_t count)
   {
-    uint64_t emission_amount = 0;
-    uint64_t total_fee_amount = 0;
+    boost::multiprecision::uint128_t emission_amount = 0;
+    boost::multiprecision::uint128_t total_fee_amount = 0;
     if (count)
     {
       const uint64_t end = start_offset + count - 1;
@@ -1203,7 +1203,7 @@ namespace cryptonote
       });
     }
 
-    return std::pair<uint64_t, uint64_t>(emission_amount, total_fee_amount);
+    return std::pair<boost::multiprecision::uint128_t, boost::multiprecision::uint128_t>(emission_amount, total_fee_amount);
   }
   //-----------------------------------------------------------------------------------------------
   bool core::check_tx_inputs_keyimages_diff(const transaction& tx) const

src/cryptonote_core/cryptonote_core.h

@@ -743,7 +743,7 @@ namespace cryptonote
       *
       * @return the number of blocks to sync in one go
       */
-     std::pair<uint64_t, uint64_t> get_coinbase_tx_sum(const uint64_t start_offset, const size_t count);
+     std::pair<boost::multiprecision::uint128_t, boost::multiprecision::uint128_t> get_coinbase_tx_sum(const uint64_t start_offset, const size_t count);
      
      /**
       * @brief get the network type we're on

src/daemon/rpc_command_executor.cpp

@@ -1851,9 +1851,9 @@ bool t_rpc_command_executor::print_coinbase_tx_sum(uint64_t height, uint64_t cou
 
   tools::msg_writer() << "Sum of coinbase transactions between block heights ["
     << height << ", " << (height + count) << ") is "
-    << cryptonote::print_money(res.emission_amount + res.fee_amount) << " "
-    << "consisting of " << cryptonote::print_money(res.emission_amount) 
-    << " in emissions, and " << cryptonote::print_money(res.fee_amount) << " in fees";
+    << cryptonote::print_money(boost::multiprecision::uint128_t(res.wide_emission_amount) + boost::multiprecision::uint128_t(res.wide_fee_amount)) << " "
+    << "consisting of " << cryptonote::print_money(boost::multiprecision::uint128_t(res.wide_emission_amount))
+    << " in emissions, and " << cryptonote::print_money(boost::multiprecision::uint128_t(res.wide_fee_amount)) << " in fees";
   return true;
 }
 

src/rpc/core_rpc_server.cpp

@@ -120,11 +120,16 @@ namespace
     return (value + quantum - 1) / quantum * quantum;
   }
 
+  void store_128(boost::multiprecision::uint128_t value, uint64_t &slow64, std::string &swide, uint64_t &stop64)
+  {
+    slow64 = (value & 0xffffffffffffffff).convert_to<uint64_t>();
+    swide = cryptonote::hex(value);
+    stop64 = ((value >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
+  }
+
   void store_difficulty(cryptonote::difficulty_type difficulty, uint64_t &sdiff, std::string &swdiff, uint64_t &stop64)
   {
-    sdiff = (difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
-    swdiff = cryptonote::hex(difficulty);
-    stop64 = ((difficulty >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
+    store_128(difficulty, sdiff, swdiff, stop64);
   }
 }
 
@@ -2486,9 +2491,9 @@ namespace cryptonote
       return true;
     }
     CHECK_PAYMENT_MIN1(req, res, COST_PER_COINBASE_TX_SUM_BLOCK * req.count, false);
-    std::pair<uint64_t, uint64_t> amounts = m_core.get_coinbase_tx_sum(req.height, req.count);
-    res.emission_amount = amounts.first;
-    res.fee_amount = amounts.second;
+    std::pair<boost::multiprecision::uint128_t, boost::multiprecision::uint128_t> amounts = m_core.get_coinbase_tx_sum(req.height, req.count);
+    store_128(amounts.first, res.emission_amount, res.wide_emission_amount, res.emission_amount_top64);
+    store_128(amounts.second, res.fee_amount, res.wide_fee_amount, res.fee_amount_top64);
     res.status = CORE_RPC_STATUS_OK;
     return true;
   }

src/rpc/core_rpc_server_commands_defs.h

@@ -2021,12 +2021,20 @@ namespace cryptonote
     struct response_t: public rpc_access_response_base
     {
       uint64_t emission_amount;
+      std::string wide_emission_amount;
+      uint64_t emission_amount_top64;
       uint64_t fee_amount;
+      std::string wide_fee_amount;
+      uint64_t fee_amount_top64;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE_PARENT(rpc_access_response_base)
         KV_SERIALIZE(emission_amount)
+        KV_SERIALIZE(wide_emission_amount)
+        KV_SERIALIZE(emission_amount_top64)
         KV_SERIALIZE(fee_amount)
+        KV_SERIALIZE(wide_fee_amount)
+        KV_SERIALIZE(fee_amount_top64)
       END_KV_SERIALIZE_MAP()
     };
     typedef epee::misc_utils::struct_init<response_t> response;

tests/functional_tests/blockchain.py

@@ -203,10 +203,15 @@ class BlockchainTest():
             res_sum = daemon.get_coinbase_tx_sum(i, 1)
             res_header = daemon.getblockheaderbyheight(i)
             assert res_sum.emission_amount == res_header.block_header.reward
+            assert res_sum.emission_amount_top64 == 0
+            assert res_sum.emission_amount == int(res_sum.wide_emission_amount, 16)
+            assert res_sum.fee_amount == int(res_sum.wide_fee_amount, 16)
 
         res = daemon.get_coinbase_tx_sum(0, 1)
         assert res.emission_amount == 17592186044415
+        assert res.emission_amount_top64 == 0
         assert res.fee_amount == 0
+        assert res.fee_amount_top64 == 0
         sum_blocks = height + nblocks - 1
         res = daemon.get_coinbase_tx_sum(0, sum_blocks)
         extrapolated = 17592186044415 + 17592186044415 * 2 * (sum_blocks - 1)