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32 lines
772 B
32 lines
772 B
3 years ago
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from .string import str_range_replace
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def c_to_iban_i(c: str) -> int:
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a = ord(c)
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if a in range(48, 58):
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return a - 48
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elif a in range(65, 91):
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return a - 65 + 10
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elif a in range(97, 123):
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return a - 97 + 10
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else:
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raise ValueError(f'Invalid IBAN character: {c} (ord: {a})')
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def iban_to_int(iban: str) -> int:
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iban = iban[4:] + iban[0:4]
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return int(''.join(map(str, map(c_to_iban_i, iban))))
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def check_iban(iban: str) -> bool:
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num = iban_to_int(iban)
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return num % 97 == 1
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def gen_check_digits(iban: str) -> str:
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iban = str_range_replace(iban, '00', 2, 4)
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num = iban_to_int(iban)
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check = 98 - (num % 97)
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iban = str_range_replace(iban, str(check).rjust(2, '0'), 2, 4)
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return iban
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