Add expected total reward to RPC "getblocktemplate".

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

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