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blockchain: bits_to_target: small clean-up

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note: why is the first byte cut unconditionally? what if it's non-zero?
Maybe the intention of cutting the first two chars in the hex case intended to
cut a "0x" prefix?? But there was no such prefix with the given format string...
This commit is contained in:
SomberNight
2021-11-13 03:07:36 +01:00
parent 6033471853
commit ee10e8e4d3
1 changed files with 5 additions and 4 deletions
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9
electrum/blockchain.py
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@@ -552,10 +552,11 @@ class Blockchain(Logger):
@classmethod @classmethod
def target_to_bits(cls, target: int) -> int: def target_to_bits(cls, target: int) -> int:
c = ("%064x" % target)[2:] c = target.to_bytes(length=32, byteorder='big')
while c[:2] == '00' and len(c) > 6: c = c[1:] # FIXME why is this done unconditionally?
c = c[2:] while c[0] == 0 and len(c) > 3:
bitsN, bitsBase = len(c) // 2, int.from_bytes(bfh(c[:6]), byteorder='big') c = c[1:]
bitsN, bitsBase = len(c), int.from_bytes(c[:3], byteorder='big')
if bitsBase >= 0x800000: if bitsBase >= 0x800000:
bitsN += 1 bitsN += 1
bitsBase >>= 8 bitsBase >>= 8