def query_decimals(self, asset: str) -> int:
        """
        This interface is used to query the asset's decimals of ONT or ONG.

        :param asset: a string which is used to indicate which asset's decimals we want to get
        :return: asset's decimals in the form of int
        """
        contract_address = self.get_asset_address(asset)
        invoke_code = build_native_invoke_code(contract_address, b'\x00', 'decimals', bytearray())
        tx = Transaction(0, 0xd1, int(time()), 0, 0, None, invoke_code, bytearray(), list())
        response = self.__sdk.rpc.send_raw_transaction_pre_exec(tx)
        try:
            decimal = ContractDataParser.to_int(response['Result'])
            return decimal
        except SDKException:
            return 0
def query_decimals ( self , asset : str ) -> int : contract_address = self . get_asset_address ( asset ) invoke_code = build_native_invoke_code ( contract_address , b'\x00' , 'decimals' , bytearray ( ) ) tx = Transaction ( 0 , 0xd1 , int ( time ( ) ) , 0 , 0 , None , invoke_code , bytearray ( ) , list ( ) ) response = self . __sdk . rpc . send_raw_transaction_pre_exec ( tx ) try : decimal = ContractDataParser . to_int ( response [ 'Result' ] ) return decimal except SDKException : return 0
This interface is used to query the asset's decimals of ONT or ONG.

        :param asset: a string which is used to indicate which asset's decimals we want to get
        :return: asset's decimals in the form of int