import base58 # Base58 decoding: https://github.com/keis/base58
def bech32_decode(bech):
charset = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
if ((any(ord(x) < 33 or ord(x) > 126 for x in bech)) or
(bech.lower() != bech and bech.upper() != bech)):
return False
bech = bech.lower()
pos = bech.rfind('1')
if pos < 1 or pos + 7 > len(bech) or len(bech) > 90:
return False
if not all(x in charset for x in bech[pos+1:]):
return False
hrp = bech[:pos]
data = [charset.find(x) for x in bech[pos+1:]]
if not bech32_verify_checksum(hrp, data):
return False
return True
def is_ltc_address(address):
if len(address) > 43 or len(address) < 26:
return False
if address[0] == "L": # Legacy Non-P2SH Address
return base58.b58decode_check(address)
elif address[0] == "3": # P2SH Address - Deprecated
return False
elif address[0] == "M": # P2SH Address
return base58.b58decode_check(address)
elif address[:4] == "ltc1": # P2WPKH Bech32 (Segwit)
return bech32_decode(address)
return False
