resolved the yield calculation issue

src/blockchain_db/blockchain_db.cpp

@@ -368,6 +368,7 @@ uint64_t BlockchainDB::add_block( const std::pair<block, blobdata>& blck
   // Now convert all of the residual balances into SAL
   boost::multiprecision::int128_t slippage_total_128 = 0;
   uint64_t slippage_total = 0;
+  if (blk.major_version >= HF_VERSION_ENABLE_CONVERT) {
     for (const auto& tally: slippage_counts) {
       boost::multiprecision::int128_t slippage_amount_128 = 0;
       if (tally.first == "SAL") {
@@ -396,6 +397,14 @@ uint64_t BlockchainDB::add_block( const std::pair<block, blobdata>& blck
       throw std::runtime_error("Found a negative slippage total when summing the burnt/minted amounts");
     slippage_total = slippage_total_128.convert_to<uint64_t>();
 
+  } else {
+
+    // Prior to activation of conversions, the staking reward is purely a percentage of the block reward
+    if (blk.miner_tx.amount_burnt == 0)
+      throw std::runtime_error("Staking reward is zero, but block reward is present");
+    slippage_total = blk.miner_tx.amount_burnt;
+  }
+  
   TIME_MEASURE_FINISH(time1);
   time_add_transaction += time1;
 

src/cryptonote_basic/cryptonote_basic.h

@@ -219,14 +219,16 @@ namespace cryptonote
       FIELD(vout)
       FIELD(extra)
       VARINT_FIELD(type)
-      if (type != cryptonote::transaction_type::MINER && type != cryptonote::transaction_type::PROTOCOL) {
+      if (type != cryptonote::transaction_type::PROTOCOL) {
+        VARINT_FIELD(amount_burnt)
+        if (type != cryptonote::transaction_type::MINER) {
           FIELD(return_address)
           FIELD(return_pubkey)
           FIELD(source_asset_type)
           FIELD(destination_asset_type)
-        VARINT_FIELD(amount_burnt)
           VARINT_FIELD(amount_slippage_limit)
         }
+      }
     END_SERIALIZE()
 
   public:

src/cryptonote_config.h

@@ -259,7 +259,7 @@ namespace config
       0x12 ,0x30, 0xF1, 0x71 , 0x61, 0x04 , 0x41, 0x61, 0x17, 0x31, 0x00, 0x82, 0x16, 0xA1, 0xA1, 0x10
     } }; // Bender's nightmare
 
-  std::string const GENESIS_TX = "0201ff000180c0d0c7bbbff60302e03c14d309ba99f81fe1e523cf7bac8cbbb10dcbb9aba66d20c31ec0ff7d0a880353414c3c000000000000002101345d3471cba278cb9969e63704569b2a531f4bd99f75224f6494ed16b966deb40100";
+  std::string const GENESIS_TX = "0201ff000180c0d0c7bbbff60302c33815291bac1b6d5c685129c1de6383e550688d005a3ce2b66a96b7050579060353414c3c00000000000000210149117096744b390170a118fc14d8f13edb40a7d2764fde3043d9fbae7d2efdef010000";
   
   uint32_t const GENESIS_NONCE = 10000;
 

src/cryptonote_core/blockchain.cpp

@@ -464,17 +464,8 @@ bool Blockchain::init(BlockchainDB* db, const network_type nettype, bool offline
     rx_set_main_seedhash(seedhash.data, tools::get_max_concurrency());
 
   // Preload the yield_block_info cache
-  uint64_t yield_lock_period = get_config(m_nettype).YIELD_LOCK_PERIOD;
-  m_yield_block_info_cache.clear();
-  uint64_t end_height = m_db->height();
-  uint64_t start_height = (end_height > yield_lock_period) ? (end_height - yield_lock_period) : 0;
-  for (uint64_t idx = start_height; idx < end_height; idx++) {
-    yield_block_info ybi;
-    int result = m_db->get_yield_block_info(idx, ybi);
-    if (result)
-      return false;
-    m_yield_block_info_cache[idx] = ybi;
-  }
+  rebuild_ybi_cache();
+  
   return true;
 }
 //------------------------------------------------------------------
@@ -1590,7 +1581,7 @@ bool Blockchain::validate_protocol_transaction(const block& b, uint64_t height,
   // Get the data for the block that matured this time
   cryptonote::yield_block_info ybi_matured;
   uint64_t lock_period = get_config(m_nettype).YIELD_LOCK_PERIOD;
-  uint64_t start_height = (height > lock_period) ? height - lock_period : 0;
+  uint64_t start_height = (height > lock_period) ? height - lock_period - 1 : 0;
   bool ok = get_ybi_entry(start_height, ybi_matured);
   if (ok && ybi_matured.locked_coins_this_block > 0) {
   
@@ -1881,7 +1872,7 @@ bool Blockchain::create_block_template(block& b, const crypto::hash *from_block,
 
   // Check to see if there are any matured YIELD TXs
   uint64_t yield_lock_period = get_config(m_nettype).YIELD_LOCK_PERIOD;
-  uint64_t start_height = (height > yield_lock_period) ? height - yield_lock_period : 0;
+  uint64_t start_height = (height > yield_lock_period) ? height - yield_lock_period - 1 : 0;
 
   cryptonote::yield_block_info ybi_matured;
   bool ok = get_ybi_entry(start_height, ybi_matured);
@@ -4296,7 +4287,7 @@ bool Blockchain::calculate_yield_payouts(const uint64_t start_height, std::vecto
   // Get the YIELD TX information for matured staked coins
   std::vector<cryptonote::yield_tx_info> yield_entries;
   // We get the yield_tx_info from the block _before_ they started to accrue yield
-  int yield_tx_result = m_db->get_yield_tx_info(start_height - 1, yield_entries);
+  int yield_tx_result = m_db->get_yield_tx_info(start_height, yield_entries);
   if (!yield_entries.size()) {
 
     // Report error and abort
@@ -4311,7 +4302,7 @@ bool Blockchain::calculate_yield_payouts(const uint64_t start_height, std::vecto
   
   // Iterate over the cached yield_block_info data
   uint64_t yield_lock_period = cryptonote::get_config(m_nettype).YIELD_LOCK_PERIOD;
-  for (uint64_t idx = start_height; idx < start_height + yield_lock_period; ++idx) {
+  for (uint64_t idx = start_height+1; idx <= start_height + yield_lock_period; ++idx) {
     // Get the next block
     if (m_yield_block_info_cache.count(idx) == 0) {
       LOG_ERROR("failed to locate yield information for block height " << idx <<"  - aborting");
@@ -4321,7 +4312,6 @@ bool Blockchain::calculate_yield_payouts(const uint64_t start_height, std::vecto
     if (ybi.slippage_total_this_block == 0) continue;
     
     boost::multiprecision::int128_t slippage_128 = ybi.slippage_total_this_block;
-    slippage_128 = (slippage_128 * 3) / 10;
 
     // Get the total number of coins locked at this height
     boost::multiprecision::int128_t locked_total_128 = ybi.locked_coins_tally;
@@ -4351,7 +4341,7 @@ bool Blockchain::rebuild_ybi_cache()
   // Get the size that the cache should be when fully populated (could be less than the lock period if the chain is young)
   uint64_t height = m_db->height();
   uint64_t yield_lock_period = cryptonote::get_config(m_nettype).YIELD_LOCK_PERIOD;
-  uint64_t ybi_cache_expected_size = std::min(height, yield_lock_period);
+  uint64_t ybi_cache_expected_size = std::min(height, yield_lock_period+1);
 
   // Now get this number of entries from the blockchain
   for (uint64_t idx = height - ybi_cache_expected_size; idx < height; ++idx) {
@@ -4380,7 +4370,7 @@ bool Blockchain::validate_ybi_cache()
   // Get the size that the cache should be if fully populated
   uint64_t height = m_db->height();
   uint64_t yield_lock_period = cryptonote::get_config(m_nettype).YIELD_LOCK_PERIOD;
-  uint64_t ybi_cache_expected_size = std::min(height, yield_lock_period);
+  uint64_t ybi_cache_expected_size = std::min(height, yield_lock_period + 1);
   if (m_yield_block_info_cache.size() != ybi_cache_expected_size) {
     // It's not the right size - report error and bail out
     LOG_ERROR("YBI cache is incorrect size - should be " << ybi_cache_expected_size << ", but found " << m_yield_block_info_cache.size() << " - aborting");
@@ -4884,8 +4874,8 @@ leave:
       uint64_t yield_lock_period = cryptonote::get_config(m_nettype).YIELD_LOCK_PERIOD;
       uint64_t ybi_cache_expected_size = std::min(new_height, yield_lock_period);
       if (new_height > yield_lock_period) {
-        if (m_yield_block_info_cache.count(new_height - yield_lock_period - 1) != 0) {
-          m_yield_block_info_cache.erase(new_height - yield_lock_period - 1);
+        if (m_yield_block_info_cache.count(new_height - yield_lock_period - 2) != 0) {
+          m_yield_block_info_cache.erase(new_height - yield_lock_period - 2);
         }
       }
       m_yield_block_info_cache[new_ybi.block_height] = new_ybi;

src/rpc/core_rpc_server_commands_defs.h

@@ -33,6 +33,7 @@
 #include "string_tools.h"
 
 #include "cryptonote_protocol/cryptonote_protocol_defs.h"
+#include "blockchain_db/blockchain_db.h"
 #include "cryptonote_basic/cryptonote_basic.h"
 #include "cryptonote_basic/difficulty.h"
 #include "crypto/hash.h"
@@ -1222,6 +1223,27 @@ namespace cryptonote
     typedef epee::misc_utils::struct_init<response_t> response;
   };
 
+  struct COMMAND_RPC_GET_YIELD_INFO
+  {
+    struct request_t
+    {
+      BEGIN_KV_SERIALIZE_MAP()
+      END_KV_SERIALIZE_MAP()
+    };
+    typedef epee::misc_utils::struct_init<request_t> request;
+    
+
+    struct response_t
+    {
+      cryptonote::yield_block_info& latest_ybi;
+      
+      BEGIN_KV_SERIALIZE_MAP()
+      KV_SERIALIZE(latest_ybi)
+      END_KV_SERIALIZE_MAP()
+    };
+    typedef epee::misc_utils::struct_init<response_t> response;
+  };
+
   struct COMMAND_RPC_GET_LAST_BLOCK_HEADER
   {
     struct request_t: public rpc_access_request_base

src/simplewallet/simplewallet.cpp

@@ -6964,7 +6964,15 @@ bool simple_wallet::transfer_main(
           if (subaddr_indices.size() > 1)
             prompt << tr("WARNING: Outputs of multiple addresses are being used together, which might potentially compromise your privacy.\n");
         }
-        prompt << boost::format(tr("Sending %s.  ")) % print_money(total_sent);
+        if (transfer_type == Burn) {
+          prompt << boost::format(tr("Burning %s %s.  ")) % print_money(total_sent) % source_asset;
+        } else if (transfer_type == Convert) {
+          prompt << boost::format(tr("Converting %s %s to %s.  ")) % print_money(total_sent) % source_asset % dest_asset;
+        } else if (transfer_type == LockForYield) {
+          prompt << boost::format(tr("Staking %s %s for yield accrual.  ")) % print_money(total_sent) % source_asset;
+        } else {
+          prompt << boost::format(tr("Sending %s %s.  ")) % print_money(total_sent) % source_asset;
+        }
         if (ptx_vector.size() > 1)
         {
           prompt << boost::format(tr("Your transaction needs to be split into %llu transactions.  "