40 lines
814 B
Python
40 lines
814 B
Python
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import logging
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import sha3
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from eth_keys import KeyAPI
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from eth_keys.backends import NativeECCBackend
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keys = KeyAPI(NativeECCBackend)
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logg = logging.getLogger(__name__)
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class Signer:
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def __init__(self, keyGetter):
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self.keyGetter = keyGetter
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def signTransaction(self, tx):
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raise NotImplementedError
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class ReferenceSigner(Signer):
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def __init__(self, keyGetter):
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super(ReferenceSigner, self).__init__(keyGetter)
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def signTransaction(self, tx):
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s = tx.serialize()
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h = sha3.keccak_256()
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h.update(s)
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g = h.digest()
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k = keys.PrivateKey(self.keyGetter(tx.sender))
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z = keys.ecdsa_sign(message_hash=g, private_key=k)
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tx.v = (tx.v * 2) + 35 + z[64]
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tx.r = z[:32]
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tx.s = z[32:64]
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return z
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