public double GetDifficulty(ChainedBlock blockindex)
{
// Floating point number that is a multiple of the minimum difficulty,
// minimum difficulty = 1.0.
if (blockindex == null)
{
if (this.ChainIndex.Tip == null)
{
return(1.0);
}
else
{
blockindex = BlockValidator.GetLastBlockIndex(this.ChainIndex.Tip, false);
}
}
var nShift = (blockindex.Header.Bits >> 24) & 0xff;
double dDiff =
(double)0x0000ffff / (double)(blockindex.Header.Bits & 0x00ffffff);
while (nShift < 29)
{
dDiff *= 256.0;
nShift++;
}
while (nShift > 29)
{
dDiff /= 256.0;
nShift--;
}
return(dDiff);
}
