X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=src%2Fcheckpoints.cpp;h=b986de89a8cb6ea79d4d99c4258c975b61b7161c;hb=d8f8063eda45b8dec864b28bb98839a2dd3a8170;hp=1ffe1cb47079ad0b3b1c0a07edd7a2e39e7bc0a1;hpb=adb8391acdf671640adb1e8be564e68b254fca69;p=novacoin.git

diff --git a/src/checkpoints.cpp b/src/checkpoints.cpp
index 1ffe1cb..b986de8 100644
--- a/src/checkpoints.cpp
+++ b/src/checkpoints.cpp
@@ -43,6 +43,8 @@ namespace Checkpoints
         ( 9690, initCheckpoint(uint256("0x00000000026561450859c46868099e0df6068a538f038cb18988fd8d47dcdaf5"), 1362791423) )
         ( 13560, initCheckpoint(uint256("0xa1591a0fcbf11f282d671581edb9f0aadcd06fee69761081e0a3245914c13729"), 1364674052) )
         ( 37092, initCheckpoint(uint256("0x0000000000a38c2f98556f46793b453e92d8fab2d31c0b93fd08bcf78e56099d"), 1376677203) )
+        ( 44200, initCheckpoint(uint256("0xc9bda7232a18b9c1f5ff974a9e5566b2d1879ceb8fc0e9e61fba9038a25b8447"), 1380145962) )
+        ( 65000, initCheckpoint(uint256("0xfb2b51a2fd65062c98a7a6053cde46aeaefebb95ba2f680e85a29ee25b1dcf05"), 1388526385) )
     ;
 
     // TestNet has no checkpoints
@@ -126,7 +128,7 @@ namespace Checkpoints
             CBlockIndex* pindex = pindexSyncCheckpoint;
             while (pindex->nHeight > pindexCheckpointRecv->nHeight)
                 if (!(pindex = pindex->pprev))
-                    return error("ValidateSyncCheckpoint: pprev1 null - block index structure failure");
+                    return error("ValidateSyncCheckpoint: pprev null - block index structure failure");
             if (pindex->GetBlockHash() != hashCheckpoint)
             {
                 hashInvalidCheckpoint = hashCheckpoint;
@@ -161,7 +163,6 @@ namespace Checkpoints
         }
         if (!txdb.TxnCommit())
             return error("WriteSyncCheckpoint(): failed to commit to db sync checkpoint %s", hashCheckpoint.ToString().c_str());
-        txdb.Close();
 
         Checkpoints::hashSyncCheckpoint = hashCheckpoint;
         return true;
@@ -192,7 +193,6 @@ namespace Checkpoints
                     return error("AcceptPendingSyncCheckpoint: SetBestChain failed for sync checkpoint %s", hashPendingCheckpoint.ToString().c_str());
                 }
             }
-            txdb.Close();
 
             if (!WriteSyncCheckpoint(hashPendingCheckpoint))
                 return error("AcceptPendingSyncCheckpoint(): failed to write sync checkpoint %s", hashPendingCheckpoint.ToString().c_str());
@@ -214,14 +214,10 @@ namespace Checkpoints
     // Automatically select a suitable sync-checkpoint 
     uint256 AutoSelectSyncCheckpoint()
     {
-        // Proof-of-work blocks are immediately checkpointed
-        // to defend against 51% attack which rejects other miners block 
-
-        // Select the last proof-of-work block
-        const CBlockIndex *pindex = GetLastBlockIndex(pindexBest, false);
-        // Search forward for a block within max span and maturity window
-        while (pindex->pnext && (pindex->GetBlockTime() + CHECKPOINT_MAX_SPAN <= pindexBest->GetBlockTime() || pindex->nHeight + std::min(6, nCoinbaseMaturity - 20) <= pindexBest->nHeight))
-            pindex = pindex->pnext;
+        const CBlockIndex *pindex = pindexBest;
+        // Search backward for a block within max span and maturity window
+        while (pindex->pprev && (pindex->GetBlockTime() + CHECKPOINT_MAX_SPAN > pindexBest->GetBlockTime() || pindex->nHeight + 8 > pindexBest->nHeight))
+            pindex = pindex->pprev;
         return pindex->GetBlockHash();
     }
 
@@ -283,7 +279,6 @@ namespace Checkpoints
             {
                 return error("ResetSyncCheckpoint: SetBestChain failed for hardened checkpoint %s", hash.ToString().c_str());
             }
-            txdb.Close();
         }
         else if(!mapBlockIndex.count(hash))
         {
@@ -449,7 +444,6 @@ bool CSyncCheckpoint::ProcessSyncCheckpoint(CNode* pfrom)
             return error("ProcessSyncCheckpoint: SetBestChain failed for sync checkpoint %s", hashCheckpoint.ToString().c_str());
         }
     }
-    txdb.Close();
 
     if (!Checkpoints::WriteSyncCheckpoint(hashCheckpoint))
         return error("ProcessSyncCheckpoint(): failed to write sync checkpoint %s", hashCheckpoint.ToString().c_str());