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authorJorge Timón <jtimon@jtimon.cc>2015-11-30 00:46:49 +0100
committerJorge Timón <jtimon@jtimon.cc>2016-01-12 13:43:14 +0100
commite86756193ebdbf71504e2a1a8db43e38d57f9673 (patch)
tree1048571b27029b21d33d889c3f37fb48c1798ad5 /src/pow.cpp
parent3cd836c1d855b92e7c73ab31979f471c4f8dad68 (diff)
MOVEONLY: non-consensus: from pow to chain:
- GetBlockProof - GetBlockProofEquivalentTime
Diffstat (limited to 'src/pow.cpp')
-rw-r--r--src/pow.cpp32
1 files changed, 0 insertions, 32 deletions
diff --git a/src/pow.cpp b/src/pow.cpp
index 5ace3fbc9b..dc58e21e12 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<int64_t>::max();
- }
- return sign * r.GetLow64();
-}