rename SEED_PREFIX constant

lib/bitcoin.py

@@ -150,7 +150,7 @@ hash_encode = lambda x: x[::-1].encode('hex')
 hash_decode = lambda x: x.decode('hex')[::-1]
 hmac_sha_512 = lambda x,y: hmac.new(x, y, hashlib.sha512).digest()
 
-def is_new_seed(x, prefix=version.SEED_BIP44):
+def is_new_seed(x, prefix=version.SEED_PREFIX):
     import mnemonic
     x = mnemonic.prepare_seed(x)
     s = hmac_sha_512("Seed version", x.encode('utf8')).encode('hex')

lib/version.py

@@ -5,5 +5,5 @@ OLD_SEED_VERSION = 4        # electrum versions < 2.0
 
 
 # The hash of the mnemonic seed must begin with this
-SEED_BIP44       = '01'      # BIP44
-SEED_2FA         = '101'     # extended seed for two-factor authentication
+SEED_PREFIX      = '01'      # BIP44
+SEED_PREFIX_2FA  = '101'     # extended seed for two-factor authentication