mv "electrum seed" stuff from bitcoin.py to mnemonic.py

electrum/bitcoin.py

@@ -310,56 +310,6 @@ def hash_decode(x: str) -> bytes:
     return bfh(x)[::-1]
 
 
-################################## electrum seeds
-
-
-def is_new_seed(x: str, prefix=version.SEED_PREFIX) -> bool:
-    from . import mnemonic
-    x = mnemonic.normalize_text(x)
-    s = bh2u(hmac_oneshot(b"Seed version", x.encode('utf8'), hashlib.sha512))
-    return s.startswith(prefix)
-
-
-def is_old_seed(seed: str) -> bool:
-    from . import old_mnemonic, mnemonic
-    seed = mnemonic.normalize_text(seed)
-    words = seed.split()
-    try:
-        # checks here are deliberately left weak for legacy reasons, see #3149
-        old_mnemonic.mn_decode(words)
-        uses_electrum_words = True
-    except Exception:
-        uses_electrum_words = False
-    try:
-        seed = bfh(seed)
-        is_hex = (len(seed) == 16 or len(seed) == 32)
-    except Exception:
-        is_hex = False
-    return is_hex or (uses_electrum_words and (len(words) == 12 or len(words) == 24))
-
-
-def seed_type(x: str) -> str:
-    if is_old_seed(x):
-        return 'old'
-    elif is_new_seed(x):
-        return 'standard'
-    elif is_new_seed(x, version.SEED_PREFIX_SW):
-        return 'segwit'
-    elif is_new_seed(x, version.SEED_PREFIX_2FA):
-        return '2fa'
-    elif is_new_seed(x, version.SEED_PREFIX_2FA_SW):
-        return '2fa_segwit'
-    return ''
-
-
-def is_seed(x: str) -> bool:
-    return bool(seed_type(x))
-
-
-def is_any_2fa_seed_type(seed_type):
-    return seed_type in ['2fa', '2fa_segwit']
-
-
 ############ functions from pywallet #####################
 
 def hash160_to_b58_address(h160: bytes, addrtype: int) -> str: