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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def decode_transaction_input(self, transaction_hash: bytes) -> Dict: """Return inputs of a method call"""

        transaction = self.contract.web3.eth.getTransaction(
            transaction_hash,
        )

        return self.contract.decode_function_input(
            transaction['input'],
        )