core: fix mining from a block that's not the current top

1 files changed, 11 insertions, 6 deletions

diff --git a/src/cryptonote_core/cryptonote_tx_utils.cpp b/src/cryptonote_core/cryptonote_tx_utils.cpp
index 7ea7e81d9..7400c4328 100644
--- a/src/cryptonote_core/cryptonote_tx_utils.cpp
+++ b/src/cryptonote_core/cryptonote_tx_utils.cpp
@@ -663,9 +663,9 @@ namespace cryptonote
     bl.minor_version = CURRENT_BLOCK_MINOR_VERSION;
     bl.timestamp = 0;
     bl.nonce = nonce;
-    miner::find_nonce_for_given_block([](const cryptonote::block &b, uint64_t height, unsigned int threads, crypto::hash &hash){
-      return cryptonote::get_block_longhash(NULL, b, hash, height, threads);
-    }, bl, 1, 0);
+    miner::find_nonce_for_given_block([](const cryptonote::block &b, uint64_t height, const crypto::hash *seed_hash, unsigned int threads, crypto::hash &hash){
+      return cryptonote::get_block_longhash(NULL, b, hash, height, seed_hash, threads);
+    }, bl, 1, 0, NULL);
     bl.invalidate_hashes();
     return true;
   }
@@ -676,7 +676,7 @@ namespace cryptonote
     rx_slow_hash(main_height, seed_height, seed_hash.data, bd.data(), bd.size(), res.data, 0, 1);
   }
 
-  bool get_block_longhash(const Blockchain *pbc, const block& b, crypto::hash& res, const uint64_t height, const int miners)
+  bool get_block_longhash(const Blockchain *pbc, const block& b, crypto::hash& res, const uint64_t height, const crypto::hash *seed_hash, const int miners)
   {
     // block 202612 bug workaround
     if (height == 202612)
@@ -693,7 +693,7 @@ namespace cryptonote
       if (pbc != NULL)
       {
         seed_height = rx_seedheight(height);
-        hash = pbc->get_pending_block_id_by_height(seed_height);
+        hash = seed_hash ? *seed_hash : pbc->get_pending_block_id_by_height(seed_height);
         main_height = pbc->get_current_blockchain_height();
       } else
       {
@@ -701,7 +701,7 @@ namespace cryptonote
         seed_height = 0;
         main_height = 0;
       }
-      rx_slow_hash(main_height, seed_height, hash.data, bd.data(), bd.size(), res.data, miners, 0);
+      rx_slow_hash(main_height, seed_height, hash.data, bd.data(), bd.size(), res.data, seed_hash ? 0 : miners, !!seed_hash);
     } else {
       const int pow_variant = b.major_version >= 7 ? b.major_version - 6 : 0;
       crypto::cn_slow_hash(bd.data(), bd.size(), res, pow_variant, height);
@@ -709,6 +709,11 @@ namespace cryptonote
     return true;
   }
 
+  bool get_block_longhash(const Blockchain *pbc, const block& b, crypto::hash& res, const uint64_t height, const int miners)
+  {
+    return get_block_longhash(pbc, b, res, height, NULL, miners);
+  }
+
   crypto::hash get_block_longhash(const Blockchain *pbc, const block& b, const uint64_t height, const int miners)
   {
     crypto::hash p = crypto::null_hash;