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big to little in shuffle

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Danny Ryan 2019-02-06 20:32:05 -08:00 committed by GitHub
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commit b3db7b0394
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1 changed files with 2 additions and 2 deletions
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specs/core/0_beacon-chain.md
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@ -707,10 +707,10 @@ def shuffle(values: List[Any], seed: Bytes32) -> List[Any]:
indices = list(range(len(values)))
for round in range(90):
hashvalues = b''.join([
hash(seed + round.to_bytes(1, 'big') + i.to_bytes(4, 'big'))
hash(seed + round.to_bytes(1, 'little') + i.to_bytes(4, 'little'))
for i in range((len(values) + 255) // 256)
])
pivot = int.from_bytes(hash(seed + round.to_bytes(1, 'big')), 'big') % n
pivot = int.from_bytes(hash(seed + round.to_bytes(1, 'little')), 'little') % n
def permute(pos):
flip = (pivot - pos) % n
maxpos = max(pos, flip)