From fa24439ff3d8ab5b9efaf66ef4dae6713b88cb35 Mon Sep 17 00:00:00 2001 From: MarcoFalke Date: Sun, 13 Dec 2015 17:58:29 +0100 Subject: Bump copyright headers to 2015 --- src/pow.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/pow.cpp') diff --git a/src/pow.cpp b/src/pow.cpp index 5ace3fbc9..7392defe6 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. -- cgit v1.2.3 From e86756193ebdbf71504e2a1a8db43e38d57f9673 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jorge=20Tim=C3=B3n?= Date: Mon, 30 Nov 2015 00:46:49 +0100 Subject: MOVEONLY: non-consensus: from pow to chain: - GetBlockProof - GetBlockProofEquivalentTime --- src/pow.cpp | 32 -------------------------------- 1 file changed, 32 deletions(-) (limited to 'src/pow.cpp') diff --git a/src/pow.cpp b/src/pow.cpp index 5ace3fbc9..dc58e21e1 100644 --- a/src/pow.cpp +++ b/src/pow.cpp @@ -102,35 +102,3 @@ bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params& 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::max(); - } - return sign * r.GetLow64(); -} -- cgit v1.2.3 From f3757a039196c804f252a4efba294e8f2b4d301d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jorge=20Tim=C3=B3n?= Date: Wed, 2 Dec 2015 03:15:42 +0100 Subject: Consensus: Decouple pow.cpp from util.h --- src/pow.cpp | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) (limited to 'src/pow.cpp') diff --git a/src/pow.cpp b/src/pow.cpp index 40c72f9d7..058404f35 100644 --- a/src/pow.cpp +++ b/src/pow.cpp @@ -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(); } @@ -94,11 +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; } -- cgit v1.2.3