1 files changed, 3 insertions, 43 deletions

diff --git a/src/pow.cpp b/src/pow.cpp
index 5ace3fbc9b..058404f357 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin Core developers
+// Copyright (c) 2009-2015 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -9,7 +9,6 @@
 #include "chain.h"
 #include "primitives/block.h"
 #include "uint256.h"
-#include "util.h"
 
 unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params)
 {
@@ -57,7 +56,6 @@ unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nF
 
     // Limit adjustment step
     int64_t nActualTimespan = pindexLast->GetBlockTime() - nFirstBlockTime;
-    LogPrintf("  nActualTimespan = %d  before bounds\n", nActualTimespan);
     if (nActualTimespan < params.nPowTargetTimespan/4)
         nActualTimespan = params.nPowTargetTimespan/4;
     if (nActualTimespan > params.nPowTargetTimespan*4)
@@ -75,12 +73,6 @@ unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nF
     if (bnNew > bnPowLimit)
         bnNew = bnPowLimit;
 
-    /// debug print
-    LogPrintf("GetNextWorkRequired RETARGET\n");
-    LogPrintf("params.nPowTargetTimespan = %d    nActualTimespan = %d\n", params.nPowTargetTimespan, nActualTimespan);
-    LogPrintf("Before: %08x  %s\n", pindexLast->nBits, bnOld.ToString());
-    LogPrintf("After:  %08x  %s\n", bnNew.GetCompact(), bnNew.ToString());
-
     return bnNew.GetCompact();
 }
 
@@ -94,43 +86,11 @@ bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params&
 
     // Check range
     if (fNegative || bnTarget == 0 || fOverflow || bnTarget > UintToArith256(params.powLimit))
-        return error("CheckProofOfWork(): nBits below minimum work");
+        return false;
 
     // Check proof of work matches claimed amount
     if (UintToArith256(hash) > bnTarget)
-        return error("CheckProofOfWork(): hash doesn't match nBits");
+        return false;
 
     return true;
 }
-
-arith_uint256 GetBlockProof(const CBlockIndex& block)
-{
-    arith_uint256 bnTarget;
-    bool fNegative;
-    bool fOverflow;
-    bnTarget.SetCompact(block.nBits, &fNegative, &fOverflow);
-    if (fNegative || fOverflow || bnTarget == 0)
-        return 0;
-    // We need to compute 2**256 / (bnTarget+1), but we can't represent 2**256
-    // as it's too large for a arith_uint256. However, as 2**256 is at least as large
-    // as bnTarget+1, it is equal to ((2**256 - bnTarget - 1) / (bnTarget+1)) + 1,
-    // or ~bnTarget / (nTarget+1) + 1.
-    return (~bnTarget / (bnTarget + 1)) + 1;
-}
-
-int64_t GetBlockProofEquivalentTime(const CBlockIndex& to, const CBlockIndex& from, const CBlockIndex& tip, const Consensus::Params& params)
-{
-    arith_uint256 r;
-    int sign = 1;
-    if (to.nChainWork > from.nChainWork) {
-        r = to.nChainWork - from.nChainWork;
-    } else {
-        r = from.nChainWork - to.nChainWork;
-        sign = -1;
-    }
-    r = r * arith_uint256(params.nPowTargetSpacing) / GetBlockProof(tip);
-    if (r.bits() > 63) {
-        return sign * std::numeric_limits<int64_t>::max();
-    }
-    return sign * r.GetLow64();
-}