1 files changed, 29 insertions, 0 deletions
diff --git a/src/checkpoints.h b/src/checkpoints.h
new file mode 100644
index 0000000000..9d52da404f
--- /dev/null
+++ b/src/checkpoints.h
@@ -0,0 +1,29 @@
+// Copyright (c) 2011 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+#ifndef BITCOIN_CHECKPOINT_H
+#define  BITCOIN_CHECKPOINT_H
+
+#include <map>
+#include "util.h"
+
+class uint256;
+class CBlockIndex;
+
+//
+// Block-chain checkpoints are compiled-in sanity checks.
+// They are updated every release or three.
+//
+namespace Checkpoints
+{
+    // Returns true if block passes checkpoint checks
+    bool CheckBlock(int nHeight, const uint256& hash);
+
+    // Return conservative estimate of total number of blocks, 0 if unknown
+    int GetTotalBlocksEstimate();
+
+    // Returns last CBlockIndex* in mapBlockIndex that is a checkpoint
+    CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex);
+}
+
+#endif