github/consensus-specs
1
1
Fork 0
mirror of https://github.com/ethereum/consensus-specs.git synced 2026-02-03 03:24:59 -05:00
Code Issues Packages Projects Releases Wiki Activity

big to little in shuffle

Browse Source
This commit is contained in:
Danny Ryan
2019-02-06 20:32:05 -08:00
committed by GitHub
parent 47b00f38dd
commit b3db7b0394
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
specs/core/0_beacon-chain.md
View File

@@ -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)