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keystore: speedup for Old_KeyStore

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from Electron-Cash/Electron-Cash@01177d7deb
This commit is contained in:
SomberNight 2019-03-27 16:30:21 +01:00
parent bca6ad5241
commit 1b3f428e88
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GPG key ID: B33B5F232C6271E9
1 changed files with 5 additions and 4 deletions
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9
electrum/keystore.py
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@ -451,14 +451,15 @@ class Old_KeyStore(Deterministic_KeyStore):
def get_private_key(self, sequence, password):
seed = self.get_hex_seed(password)
self.check_seed(seed)
for_change, n = sequence
secexp = self.stretch_key(seed)
self.check_seed(seed, secexp=secexp)
for_change, n = sequence
pk = self.get_private_key_from_stretched_exponent(for_change, n, secexp)
return pk, False
def check_seed(self, seed):
secexp = self.stretch_key(seed)
def check_seed(self, seed, *, secexp=None):
if secexp is None:
secexp = self.stretch_key(seed)
master_private_key = ecc.ECPrivkey.from_secret_scalar(secexp)
master_public_key = master_private_key.get_public_key_bytes(compressed=False)[1:]
if master_public_key != bfh(self.mpk):