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Update specs/core/0_beacon-chain.md

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Co-Authored-By: vbuterin <v@buterin.com>
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Danny Ryan
2019-02-07 21:51:56 -06:00
committed by GitHub
parent 89b9894328
commit f797826ee2
1 changed files with 1 additions and 1 deletions
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specs/core/0_beacon-chain.md
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@@ -708,7 +708,7 @@ def get_permuted_index(index: int, list_size: int, seed: Bytes32, round_count: i
See the 'generalized domain' algorithm on page 3.
"""
for round in range(round_count):
pivot = bytes_to_int(hash(seed + int_to_bytes1(round))) % list_size
pivot = bytes_to_int(hash(seed + int_to_bytes1(round))[0:8]) % list_size
flip = (pivot - index) % list_size
position = max(index, flip)
source = hash(seed + int_to_bytes1(round) + int_to_bytes4(position // 256))