Add expected total reward to RPC "getblocktemplate".

Only works from V5 fork onward - returns 0 before that block.

src/cryptonote_basic/miner.cpp

@@ -122,13 +122,15 @@ namespace cryptonote
     block bl = AUTO_VAL_INIT(bl);
     difficulty_type di = AUTO_VAL_INIT(di);
     uint64_t height = AUTO_VAL_INIT(height);
+    uint64_t expected_reward; //only used for RPC calls - could possibly be useful here too?
+
     cryptonote::blobdata extra_nonce;
     if(m_extra_messages.size() && m_config.current_extra_message_index < m_extra_messages.size())
     {
       extra_nonce = m_extra_messages[m_config.current_extra_message_index];
     }
 
-    if(!m_phandler->get_block_template(bl, m_mine_address, di, height, extra_nonce))
+    if(!m_phandler->get_block_template(bl, m_mine_address, di, height, expected_reward, extra_nonce))
     {
       LOG_ERROR("Failed to get_block_template(), stopping mining");
       return false;

src/cryptonote_basic/miner.h

@@ -51,7 +51,7 @@ namespace cryptonote
   struct i_miner_handler
   {
     virtual bool handle_block_found(block& b) = 0;
-    virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, const blobdata& ex_nonce) = 0;
+    virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce) = 0;
   protected:
     ~i_miner_handler(){};
   };

src/cryptonote_core/blockchain.cpp

@@ -1072,7 +1072,7 @@ uint64_t Blockchain::get_current_cumulative_blocksize_limit() const
 // in a lot of places.  That flag is not referenced in any of the code
 // nor any of the makefiles, howeve.  Need to look into whether or not it's
 // necessary at all.
-bool Blockchain::create_block_template(block& b, const account_public_address& miner_address, difficulty_type& diffic, uint64_t& height, const blobdata& ex_nonce)
+bool Blockchain::create_block_template(block& b, const account_public_address& miner_address, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce)
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   size_t median_size;
@@ -1096,7 +1096,7 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m
 
   size_t txs_size;
   uint64_t fee;
-  if (!m_tx_pool.fill_block_template(b, median_size, already_generated_coins, txs_size, fee, m_hardfork->get_current_version()))
+  if (!m_tx_pool.fill_block_template(b, median_size, already_generated_coins, txs_size, fee, expected_reward, m_hardfork->get_current_version()))
   {
     return false;
   }

src/cryptonote_core/blockchain.h

@@ -323,11 +323,12 @@ namespace cryptonote
      * @param miner_address address new coins for the block will go to
      * @param di return-by-reference tells the miner what the difficulty target is
      * @param height return-by-reference tells the miner what height it's mining against
+     * @param expected_reward return-by-reference the total reward awarded to the miner finding this block, including transaction fees
      * @param ex_nonce extra data to be added to the miner transaction's extra
      *
      * @return true if block template filled in successfully, else false
      */
-    bool create_block_template(block& b, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, const blobdata& ex_nonce);
+    bool create_block_template(block& b, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce);
 
     /**
      * @brief checks if a block is known about with a given hash

src/cryptonote_core/cryptonote_core.cpp

@@ -827,9 +827,9 @@ namespace cryptonote
     m_mempool.set_relayed(txs);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, const blobdata& ex_nonce)
+  bool core::get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce)
   {
-    return m_blockchain_storage.create_block_template(b, adr, diffic, height, ex_nonce);
+    return m_blockchain_storage.create_block_template(b, adr, diffic, height, expected_reward, ex_nonce);
   }
   //-----------------------------------------------------------------------------------------------
   bool core::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, NOTIFY_RESPONSE_CHAIN_ENTRY::request& resp) const

src/cryptonote_core/cryptonote_core.h

@@ -180,7 +180,7 @@ namespace cryptonote
       *
       * @note see Blockchain::create_block_template
       */
-     virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, const blobdata& ex_nonce);
+     virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce);
 
      /**
       * @brief called when a transaction is relayed

src/cryptonote_core/tx_pool.cpp

@@ -613,7 +613,7 @@ namespace cryptonote
   }
   //---------------------------------------------------------------------------------
   //TODO: investigate whether boolean return is appropriate
-  bool tx_memory_pool::fill_block_template(block &bl, size_t median_size, uint64_t already_generated_coins, size_t &total_size, uint64_t &fee, uint8_t version)
+  bool tx_memory_pool::fill_block_template(block &bl, size_t median_size, uint64_t already_generated_coins, size_t &total_size, uint64_t &fee, uint64_t &expected_reward, uint8_t version)
   {
     // Warning: This function takes already_generated_
     // coins as an argument and appears to do nothing
@@ -705,6 +705,7 @@ namespace cryptonote
       LOG_PRINT_L2("  added, new block size " << total_size << "/" << max_total_size << ", coinbase " << print_money(best_coinbase));
     }
 
+    expected_reward = best_coinbase;
     LOG_PRINT_L2("Block template filled with " << bl.tx_hashes.size() << " txes, size "
         << total_size << "/" << max_total_size << ", coinbase " << print_money(best_coinbase)
         << " (including " << print_money(fee) << " in fees)");

src/cryptonote_core/tx_pool.h

@@ -220,11 +220,12 @@ namespace cryptonote
      * @param already_generated_coins the current total number of coins "minted"
      * @param total_size return-by-reference the total size of the new block
      * @param fee return-by-reference the total of fees from the included transactions
+     * @param expected_reward return-by-reference the total reward awarded to the miner finding this block, including transaction fees
      * @param version hard fork version to use for consensus rules
      *
      * @return true
      */
-    bool fill_block_template(block &bl, size_t median_size, uint64_t already_generated_coins, size_t &total_size, uint64_t &fee, uint8_t version);
+    bool fill_block_template(block &bl, size_t median_size, uint64_t already_generated_coins, size_t &total_size, uint64_t &fee, uint64_t &expected_reward, uint8_t version);
 
     /**
      * @brief get a list of all transactions in the pool

src/rpc/core_rpc_server.cpp

@@ -883,7 +883,7 @@ namespace cryptonote
     block b = AUTO_VAL_INIT(b);
     cryptonote::blobdata blob_reserve;
     blob_reserve.resize(req.reserve_size, 0);
-    if(!m_core.get_block_template(b, acc, res.difficulty, res.height, blob_reserve))
+    if(!m_core.get_block_template(b, acc, res.difficulty, res.height, res.expected_reward, blob_reserve))
     {
       error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
       error_resp.message = "Internal error: failed to create block template";

src/rpc/core_rpc_server_commands_defs.h

@@ -49,7 +49,7 @@ namespace cryptonote
 // advance which version they will stop working with
 // Don't go over 32767 for any of these
 #define CORE_RPC_VERSION_MAJOR 1
-#define CORE_RPC_VERSION_MINOR 9
+#define CORE_RPC_VERSION_MINOR 10
 #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)
 
@@ -692,6 +692,7 @@ namespace cryptonote
       uint64_t difficulty;
       uint64_t height;
       uint64_t reserved_offset;
+      uint64_t expected_reward;
       std::string prev_hash;
       blobdata blocktemplate_blob;
       blobdata blockhashing_blob;
@@ -701,6 +702,7 @@ namespace cryptonote
         KV_SERIALIZE(difficulty)
         KV_SERIALIZE(height)
         KV_SERIALIZE(reserved_offset)
+        KV_SERIALIZE(expected_reward)
         KV_SERIALIZE(prev_hash)
         KV_SERIALIZE(blocktemplate_blob)
         KV_SERIALIZE(blockhashing_blob)