def has_matching_signatures(self) -> bool:
"""
Check that the signatures match the terms of trade.
:return: True if the transaction has been signed by both parties
"""
# singable_message = LedgerApis.sign_message(self.sender_hash)
result = (
self.sender_address in LedgerApis.recover_message( # pylint: disable=no-member
identifier=self.ledger_id,
message=self.sender_hash.encode("utf-8"),
signature=self.sender_signature,
))
# counterparty_signable_message = LedgerApis.sign_message(self.counterparty_hash)
result = (
result and self.counterparty_address in LedgerApis.recover_message( # pylint: disable=no-member
identifier=self.ledger_id,
message=self.counterparty_hash.encode("utf-8"),
signature=self.counterparty_signature,
))
return result
def _valid_signature(self, expected_signer: str, signature: str,
message_str: str, ledger_id: str) -> bool:
"""
Check if the signature and message match the expected signer.
:param expected_signer: the signer
:param signature: the signature
:param message_str: the message
:param ledger_id: the ledger id
:return: bool indiciating validity
"""
try:
result = expected_signer in LedgerApis.recover_message(
ledger_id, message_str.encode("utf-8"), signature)
except Exception as e: # pylint: disable=broad-except
self.context.logger.warning(f"Signing exception: {e}")
result = False
return result