Merge pull request #644

9d62c16 blockchain_import: Add hard fork data for each block when verify mode is off (warptangent)
7006b2e blockchain_utilities: Have fake_core create HardFork object (warptangent)
8f863e7 Blockchain: Optionally pass in HardFork object (warptangent)
f7e337e fake_core: Check if hard fork subdbs need reset at start (warptangent)
c657e77 blockchain_import: Add --drop-hard-fork command (warptangent)
4122439 blockchain_import: Add exception to log output (warptangent)

1 files changed, 21 insertions, 2 deletions

diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index c18db7724..5982b9d9a 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -2450,13 +2450,32 @@ void BlockchainLMDB::check_hard_fork_info()
     throw0(DB_ERROR("Failed to query m_hf_starting_heights"));
   if (db_stat1.ms_entries != db_stat2.ms_entries)
   {
-    mdb_drop(*txn_ptr, m_hf_starting_heights, 1);
-    mdb_drop(*txn_ptr, m_hf_versions, 1);
+    // Empty, but don't delete. This allows this function to be called after
+    // startup, after the subdbs have already been created, and rest of startup
+    // can proceed. If these don't exist, hard fork's init() will fail.
+    //
+    // If these are empty, hard fork's init() will repopulate the hard fork
+    // data.
+    mdb_drop(*txn_ptr, m_hf_starting_heights, 0);
+    mdb_drop(*txn_ptr, m_hf_versions, 0);
   }
 
   TXN_POSTFIX_SUCCESS();
 }
 
+void BlockchainLMDB::drop_hard_fork_info()
+{
+  LOG_PRINT_L3("BlockchainLMDB::" << __func__);
+  check_open();
+
+  TXN_PREFIX(0);
+
+  mdb_drop(*txn_ptr, m_hf_starting_heights, 1);
+  mdb_drop(*txn_ptr, m_hf_versions, 1);
+
+  TXN_POSTFIX_SUCCESS();
+}
+
 void BlockchainLMDB::set_hard_fork_starting_height(uint8_t version, uint64_t height)
 {
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);