def _public_from_signature(self, tx):
s = self.w3.eth.account._keys.Signature(vrs=(to_standard_v(extract_chain_id(tx.v)[1]), self.w3.toInt(tx.r), self.w3.toInt(tx.s)))
tt = {k: tx[k] for k in ALLOWED_TRANSACTION_KEYS - {'chainId', 'data'}}
tt['data'] = tx.input
tt['chainId'] = extract_chain_id(tx.v)[0]
ut = serializable_unsigned_transaction_from_dict(tt)
return s.recover_public_key_from_msg_hash(ut.hash()).to_hex()[2:]
def _recover_hash(self, message_hash, vrs=None, signature=None):
hash_bytes = HexBytes(message_hash)
if len(hash_bytes) != 32:
raise ValueError("The message hash must be exactly 32-bytes")
if vrs is not None:
v, r, s = map(hexstr_if_str(to_int), vrs)
v_standard = to_standard_v(v)
signature_obj = self._keys.Signature(vrs=(v_standard, r, s))
elif signature is not None:
signature_bytes = HexBytes(signature)
signature_bytes_standard = to_standard_signature_bytes(signature_bytes)
signature_obj = self._keys.Signature(signature_bytes=signature_bytes_standard)
else:
raise TypeError("You must supply the vrs tuple or the signature bytes")
pubkey = signature_obj.recover_public_key_from_msg_hash(hash_bytes)
return pubkey.to_checksum_address()