examples/python/wasm_c_simple_add.py

#!/usr/bin/env python3

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

import sys

from teaclave import FunctionArgument
from utils import USER_ID, USER_PASSWORD, connect_authentication_service, connect_frontend_service, PlatformAdmin


class WASMAddExample:

    def __init__(self, user_id, user_password):
        self.user_id = user_id
        self.user_password = user_password

    def add(self,
            payload_file="wasm_c_simple_add_payload/simple_add.wasm",
            adder1="3",
            adder2="4"):
        with connect_authentication_service() as client:
            print(f"[+] {self.user_id} login")
            token = client.user_login(self.user_id, self.user_password)
        client = connect_frontend_service()
        metadata = {"id": self.user_id, "token": token}
        client.metadata = metadata

        print("[+] registering function")

        with open(payload_file, "rb") as f:
            payload = f.read()

        function_id = client.register_function(
            name="entrypoint",
            description="test of wasm",
            executor_type="wamr",
            payload=list(payload),
            arguments=[FunctionArgument("adder1"),
                       FunctionArgument("adder2")])

        print("[+] creating task")
        task_id = client.create_task(function_id=function_id,
                                     function_arguments={
                                         "adder1": adder1,
                                         "adder2": adder2
                                     },
                                     executor="wamr")

        print("[+] invoking task")
        client.invoke_task(task_id)

        print("[+] getting result")
        result = client.get_task_result(task_id)
        print("[+] done")
        client.close()

        return bytes(result)


def main():
    example = WASMAddExample(USER_ID, USER_PASSWORD)
    if len(sys.argv) == 2:
        adder1 = sys.argv[1]
        rt = example.add(adder1=adder1)
    elif len(sys.argv) == 3:
        adder1 = sys.argv[1]
        adder2 = sys.argv[2]

        rt = example.add(adder1=adder1, adder2=adder2)
    else:
        rt = example.add()

    print("[+] function return: ", rt)


if __name__ == '__main__':
    main()