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-rw-r--r--src/cryptonote_core/checkpoints.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/cryptonote_core/checkpoints.cpp b/src/cryptonote_core/checkpoints.cpp
index 58edda7c9..e4223afb5 100644
--- a/src/cryptonote_core/checkpoints.cpp
+++ b/src/cryptonote_core/checkpoints.cpp
@@ -84,6 +84,10 @@ namespace cryptonote
return check_block(height, h, ignored);
}
//---------------------------------------------------------------------------
+ // this basically says if the blockchain is smaller than the first
+ // checkpoint then alternate blocks are allowed. Alternatively, if the
+ // last checkpoint *before* the end of the current chain is also before
+ // the block to be added, then this is fine.
bool checkpoints::is_alternative_block_allowed(uint64_t blockchain_height, uint64_t block_height) const
{
if (0 == block_height)