diff options
Diffstat (limited to 'src/rpc.cpp')
-rw-r--r-- | src/rpc.cpp | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/src/rpc.cpp b/src/rpc.cpp index b05a13e23b..ad1abe333e 100644 --- a/src/rpc.cpp +++ b/src/rpc.cpp @@ -204,12 +204,26 @@ double GetDifficulty() { // Floating point number that is a multiple of the minimum difficulty, // minimum difficulty = 1.0. + if (pindexBest == NULL) return 1.0; - int nShift = 256 - 32 - 31; // to fit in a uint - double dMinimum = (CBigNum().SetCompact(bnProofOfWorkLimit.GetCompact()) >> nShift).getuint(); - double dCurrently = (CBigNum().SetCompact(pindexBest->nBits) >> nShift).getuint(); - return dMinimum / dCurrently; + int nShift = (pindexBest->nBits >> 24) & 0xff; + + double dDiff = + (double)0x0000ffff / (double)(pindexBest->nBits & 0x00ffffff); + + while (nShift < 29) + { + dDiff *= 256.0; + nShift++; + } + while (nShift > 29) + { + dDiff /= 256.0; + nShift--; + } + + return dDiff; } Value getdifficulty(const Array& params, bool fHelp) |