checkpoints.cpp depends on main, it can use mapBlockIndex directly

src/checkpoints.cpp

@@ -146,7 +146,7 @@ namespace Checkpoints {
         return checkpoints.rbegin()->first;
     }
 
-    CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex)
+    CBlockIndex* GetLastCheckpoint()
     {
         if (!fEnabled)
             return NULL;

src/checkpoints.h

@@ -22,7 +22,7 @@ namespace Checkpoints {
     int GetTotalBlocksEstimate();
 
     // Returns last CBlockIndex* in mapBlockIndex that is a checkpoint
-    CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex);
+    CBlockIndex* GetLastCheckpoint();
 
     double GuessVerificationProgress(CBlockIndex *pindex, bool fSigchecks = true);
 

src/main.cpp

@@ -2302,7 +2302,7 @@ bool AcceptBlockHeader(CBlockHeader& block, CValidationState& state, CBlockIndex
             return state.Invalid(error("AcceptBlock() : block is marked invalid"), 0, "duplicate");
     }
 
-    CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex);
+    CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint();
     if (pcheckpoint && block.hashPrevBlock != (chainActive.Tip() ? chainActive.Tip()->GetBlockHash() : uint256(0)))
     {
         // Extra checks to prevent "fill up memory by spamming with bogus blocks"
@@ -2345,7 +2345,7 @@ bool AcceptBlockHeader(CBlockHeader& block, CValidationState& state, CBlockIndex
                              REJECT_CHECKPOINT, "checkpoint mismatch");
 
         // Don't accept any forks from the main chain prior to last checkpoint
-        CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex);
+        CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint();
         if (pcheckpoint && nHeight < pcheckpoint->nHeight)
             return state.DoS(100, error("AcceptBlock() : forked chain older than last checkpoint (height %d)", nHeight));
 
@@ -3286,7 +3286,7 @@ void static ProcessGetData(CNode* pfrom)
                     // If the requested block is at a height below our last
                     // checkpoint, only serve it if it's in the checkpointed chain
                     int nHeight = mi->second->nHeight;
-                    CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex);
+                    CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint();
                     if (pcheckpoint && nHeight < pcheckpoint->nHeight) {
                         if (!chainActive.Contains(mi->second))
                         {