From 24809b16b63c43ca3b2935889b32605b76c2f2ea Mon Sep 17 00:00:00 2001
From: aniemerg <niemerg@gmail.com>
Date: Mon, 20 Jun 2016 22:21:42 -0400
Subject: [PATCH] Update GetDifficulty() to use consensus.powLimit from
 consensus parameters. Fixes #1032.

---
 src/rpcblockchain.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index 4d46a1370..0450a5a3b 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -34,16 +34,20 @@ double GetDifficulty(const CBlockIndex* blockindex)
     }
 
     int nShift = (blockindex->nBits >> 24) & 0xff;
+    uint32_t powLimit =
+        UintToArith256(Params().GetConsensus().powLimit).GetCompact();;
+    int nShiftAmount = (powLimit >> 24) & 0xff;
 
     double dDiff =
-        (double)0x0000ffff / (double)(blockindex->nBits & 0x00ffffff);
+        (double)(powLimit & 0x00ffffff) / 
+        (double)(blockindex->nBits & 0x00ffffff);
 
-    while (nShift < 29)
+    while (nShift < nShiftAmount)
     {
         dDiff *= 256.0;
         nShift++;
     }
-    while (nShift > 29)
+    while (nShift > nShiftAmount)
     {
         dDiff /= 256.0;
         nShift--;