From 3ecbf9013400e6981990450949a298c5fddfb9f2 Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Thu, 8 Mar 2018 01:15:08 +0200
Subject: [PATCH] Test already existing block

---
 src/main.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index ee90b74bd..6a7dd95de 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3437,6 +3437,36 @@ bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBloc
             *ppindex = pindex;
         if (pindex != 0 && pindex->nStatus & BLOCK_FAILED_MASK)
             return state.Invalid(error("%s: block is marked invalid", __func__), 0, "duplicate");
+       if ( pindex != 0 ) // jl777 debug test
+       {
+           if (!CheckBlockHeader(*ppindex!=0?(*ppindex)->nHeight:0,*ppindex, block, state))
+           {
+               fprintf(stderr,"known block failing CheckBlockHeader %d\n",(int32_t)pindex->nHeight);
+               return false;
+           }
+           CBlockIndex* pindexPrev = NULL;
+           if (hash != chainparams.GetConsensus().hashGenesisBlock)
+           {
+               BlockMap::iterator mi = mapBlockIndex.find(block.hashPrevBlock);
+               if (mi == mapBlockIndex.end())
+               {
+                   fprintf(stderr,"known block.%d failing to find prevblock\n",(int32_t)pindex->nHeight);
+                   return state.DoS(10, error("%s: prev block not found", __func__), 0, "bad-prevblk");
+               }
+               pindexPrev = (*mi).second;
+               if (pindexPrev == 0 || (pindexPrev->nStatus & BLOCK_FAILED_MASK) )
+               {
+                   fprintf(stderr,"known block.%d found invalid prevblock\n",(int32_t)pindex->nHeight);
+                   return state.DoS(100, error("%s: prev block invalid", __func__), REJECT_INVALID, "bad-prevblk");
+               }
+           }
+           if (!ContextualCheckBlockHeader(block, state, pindexPrev))
+           {
+               fprintf(stderr,"known block.%d failing ContextualCheckBlockHeader\n",(int32_t)pindex->nHeight);
+               return false;
+           }
+       }
+        
         return true;
     }