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Fix lint

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Dankrad Feist 2020-04-05 15:35:11 +01:00
parent bf34fdf023
commit c3c24b4fc4
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GPG Key ID: 6815E6A20BEBBABA
1 changed files with 7 additions and 5 deletions
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specs/phase1/custody-game.md
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@ -193,11 +193,12 @@ def get_custody_atoms(bytez: bytes) -> Sequence[bytes]:
Extract the custody secrets from the signature Extract the custody secrets from the signature
```python ```python
def get_custody_secrets(key: BLSSignature): def get_custody_secrets(key: BLSSignature) -> Sequence[int]:
full_G2_element = bls.signature_to_G2(key) full_G2_element = bls.signature_to_G2(key)
signature = full_G2_element[0].coeffs signature = full_G2_element[0].coeffs
signature_bytes = sum(x.to_bytes(48, "little") for x in signature) signature_bytes = b"".join(x.to_bytes(48, "little") for x in signature)
secrets = [int.from_bytes(x[i:i+BYTES_PER_CUSTODY_ATOM]) for i in range(0, len(signature_bytes), 32)] secrets = [int.from_bytes(signature_bytes[i:i + BYTES_PER_CUSTODY_ATOM], "little")
for i in range(0, len(signature_bytes), 32)]
return secrets return secrets
``` ```
@ -208,8 +209,9 @@ def compute_custody_bit(key: BLSSignature, data: bytes) -> bit:
secrets = get_custody_secrets(key) secrets = get_custody_secrets(key)
custody_atoms = get_custody_atoms(data) custody_atoms = get_custody_atoms(data)
n = len(custody_atoms) n = len(custody_atoms)
uhf = sum(secrets[i % CUSTORY_SECRETS]**i * int.from_bytes(atom, "little") for i, atom in enumerate(custody_atoms)) + secrets[n % CUSTORY_SECRETS]**n uhf = (sum(secrets[i % CUSTODY_SECRETS]**i * int.from_bytes(atom, "little") % CUSTODY_PRIME
return legendre_bit(uhf + secrets[0], BLS12_381_Q) for i, atom in enumerate(custody_atoms)) + secrets[n % CUSTODY_SECRETS]**n) % CUSTODY_PRIME
return legendre_bit(uhf + secrets[0], CUSTODY_PRIME)
``` ```
### `get_randao_epoch_for_custody_period` ### `get_randao_epoch_for_custody_period`