43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
from collections import namedtuple
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LEGACY = namedtuple('Legacy', 'payload')
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NAMED_SECP256K1 = namedtuple('NamedSECP256k1', 'raw_signature certificate_id payload')
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FLAGS = {
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LEGACY: 0x80,
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NAMED_SECP256K1: 0x01
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}
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class Signature:
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def __init__(self, data: namedtuple):
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assert isinstance(data, (LEGACY, NAMED_SECP256K1))
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self.data = data
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@property
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def payload(self):
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return self.data.payload
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@property
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def certificate_id(self):
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if type(self.data) == NAMED_SECP256K1:
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return self.data.certificate_id
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@property
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def raw_signature(self):
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if type(self.data) == NAMED_SECP256K1:
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return self.data.raw_signature
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@classmethod
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def flagged_parse(cls, binary: bytes):
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flag = binary[0]
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if flag == FLAGS[NAMED_SECP256K1]:
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return cls(NAMED_SECP256K1(binary[1:65], binary[65:85], binary[85:]))
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else:
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return cls(LEGACY(binary))
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@property
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def serialized(self):
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if isinstance(self.data, NAMED_SECP256K1):
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return (bytes([FLAGS[type(self.data)]]) + self.data.raw_signature + self.data.certificate_id + self.payload)
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elif isinstance(self.data, LEGACY):
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return self.payload
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