Spot market

market/.gitignore

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+__pycache__/
+
+# DB related
+db.sqlite3

market/Makefile

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+.PHONY: protobuf
+
+protobuf:
+	./tools/make_protobuf.sh
+

market/README

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+# Spot Market
+
+The spot market is a virtual market where sellers can post their bandwidth offers
+on the whiteboard, and buyers can buy part or the total amount of the offer.
+
+An offer contains a bandwidth profile (bandwidth vs time) and a path policy (what ASes can
+be reached using this offer).
+
+## Development
+
+### Install pip packages:
+```bash
+python3 -m venv .venv
+echo '*' > .venv/.gitignore
+source .venv/bin/activate
+pip install --require-hashes -r requirements.txt
+```
+
+### Add new dependencies:
+The project uses pip-tools. Edit the `requirements.in` file and generate a new `requirements.txt`
+for pip to use:
+```bash
+pip-compile --generate-hashes --allow-unsafe --output-file=requirements.txt requirements.in
+```

market/defs.py

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+# define constants
+BW_UNIT = 1000000000  # 1 Gbps
+BW_PERIOD = 600  # 600 seconds = 10 minutes

market/integration_test.py

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+#!/usr/bin/env python
+
+# This test runs Django gRPC, a provider, and two clients.
+# The provider adds an offer and the clients list and attempt to buy it.
+# The profile that the clients buy is exactly half of the offer, so the
+# aggregation of the purchases should fit. Because the first client to
+# buy the offer will destroy the original offer (as its bandwidth is now halved),
+# the second client will need to list and buy again.
+
+# The test ends terminating Django gRPC.
+# The test exits with 0 if okay, non zero otherwise.
+
+
+from django.utils import timezone as tz
+from google.protobuf.timestamp_pb2 import Timestamp
+from concurrent.futures import ThreadPoolExecutor
+from pathlib import Path
+from defs import BW_PERIOD
+from util.conversion import pb_timestamp_from_time
+from util import crypto
+from util import serialize
+
+import sys
+import os
+import subprocess
+import time
+import grpc
+import market_pb2
+import market_pb2_grpc
+
+
+def _list(channel):
+    stub = market_pb2_grpc.MarketControllerStub(channel)
+    response = stub.ListOffers(market_pb2.ListRequest())
+    offers = [o for o in response]
+    return offers
+
+
+def _buy(channel, key, buyer_ia, offer):
+    stub = market_pb2_grpc.MarketControllerStub(channel)
+    request = market_pb2.PurchaseRequest(
+        offer_id=offer.id,
+        buyer_iaid=buyer_ia,
+        signature=b"",
+        bw_profile="1,1,1,1",
+        starting_on=pb_timestamp_from_time(tz.datetime.fromisoformat("2022-04-01T20:00:00.000000+00:00")))
+    # sign the purchase request
+    offerbytes = serialize.offer_fields_serialize_to_bytes(
+        offer.iaid,
+        offer.iscore,
+        offer.notbefore.ToSeconds(),
+        offer.notafter.ToSeconds(),
+        offer.reachable_paths,
+        offer.qos_class,
+        offer.price_per_nanounit,
+        offer.bw_profile
+    )
+    data = serialize.purchase_order_fields_serialize_to_bytes(
+        offerbytes,
+        request.bw_profile,
+        request.starting_on.ToSeconds()
+    )
+    request.signature = crypto.signature_create(key, data)
+    return stub.Purchase(request)
+
+
+def run_django():
+    if os.path.exists("db.sqlite3"):
+        os.remove("db.sqlite3")
+    p = subprocess.Popen(["./manage.py", "migrate"], stdout=subprocess.DEVNULL)
+    p.wait()
+    p = subprocess.Popen(
+        ["./manage.py", "loaddata", "./market/fixtures/testdata.yaml"],
+        stdout=subprocess.DEVNULL)
+    p.wait()
+    p = subprocess.Popen(["./manage.py", "grpcrunserver"])
+    time.sleep(1)
+    return p
+
+
+def provider():
+    with grpc.insecure_channel('localhost:50051') as channel:
+        stub = market_pb2_grpc.MarketControllerStub(channel)
+        notbefore = tz.datetime.fromisoformat("2022-04-01T20:00:00.000000+00:00")
+        notafter = notbefore + tz.timedelta(seconds=4*BW_PERIOD)
+        o = market_pb2.Offer(
+            iaid="1-ff00:0:110",
+            iscore=True,
+            signature=b"",
+            notbefore=Timestamp(seconds=int(notbefore.timestamp())),
+            notafter=Timestamp(seconds=int(notafter.timestamp())),
+            reachable_paths="*",
+            qos_class=1,
+            price_per_nanounit=10,
+            bw_profile="2,2,2,2")
+        with open(Path(__file__).parent.joinpath("market", "tests", "data",
+            "1-ff00_0_110.key"), "r") as f:
+            key = crypto.load_key(f.read())
+        # sign with private key
+        data = serialize.offer_serialize_to_bytes(o)
+        o.signature = crypto.signature_create(key, data)
+        # do RPC
+        saved = stub.AddOffer(o)
+        print(f"provider created offer with id {saved.id}")
+
+
+def client(ia: str, wait: int):
+    # load key
+    iafile = ia.replace(":", "_")
+    with open(Path(__file__).parent.joinpath("market", "tests", "data", iafile + ".key"), "r") as f:
+        key = crypto.load_key(f.read())
+    # buy
+    for _ in range(2):
+        with grpc.insecure_channel('localhost:50051') as channel:
+            offers = _list(channel)
+            time.sleep(wait)
+            o = offers[0]
+            response = _buy(channel, key, ia, o)
+            if response.contract_id > 0:
+                print(f"Client with ID: {ia} got contract with ID: {response.contract_id}")
+                return 0
+            print(f"Client with ID: {ia} could not buy: {response.message}")
+    print(f"Client with ID: {ia} too many attempts")
+    return 1
+
+
+def main():
+    # run django like this, or change to what is said on
+    # https://stackoverflow.com/questions/19447603/how-to-kill-a-python-child-process-created-with-\
+    # subprocess-check-output-when-t/19448096#19448096
+    django = run_django()
+    provider()
+    with ThreadPoolExecutor() as executor:
+        tasks = [
+            executor.submit(lambda: client("1-ff00:0:111", 1)),
+            executor.submit(lambda: client("1-ff00:0:112", 0)),
+        ]
+    res = 0
+    for t in tasks:
+        if t.result() != 0:
+            res = 1
+    django.terminate()
+    try:
+        django.wait(timeout=1)
+    finally:
+        pass
+    django.kill()
+    print(f"done (exits with {res})")
+    return res
+
+
+if __name__ == "__main__":
+    sys.exit(main())

market/manage.py

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+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'market.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

market/market/admin.py

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+from django.contrib import admin
+
+# Register your models here.

market/market/apps.py

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+from django.apps import AppConfig
+
+
+class MarketConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'market'

market/market/asgi.py

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+"""
+ASGI config for market project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.0/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'market.settings')
+
+application = get_asgi_application()

market/market/fixtures/create_fixtures.py

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+from market.models.ases import AS
+from market.models.broker import Broker
+from util import crypto
+from pathlib import Path
+
+
+def _ases():
+    ases = ["1-ff00:0:110", "1-ff00:0:111", "1-ff00:0:112"]
+    for iaid in ases:
+        # load certificate
+        cert = iaid.replace(":", "_") + ".crt"
+        p = Path(__file__).parent.parent.joinpath("tests", "data", cert)
+        with open(p, "r") as f:
+            cert = crypto.load_certificate(f.read())
+        # create AS
+        AS.objects.create(
+            iaid=iaid,
+            cert=cert,
+        )
+
+
+def _broker():
+    # load key
+    with open(Path(__file__).parent.parent.joinpath("tests", "data", "broker.key"), "r") as f:
+        key = crypto.load_key(f.read())
+    # load certificate
+    with open(Path(__file__).parent.parent.joinpath("tests", "data", "broker.crt"), "r") as f:
+        cert = crypto.load_certificate(f.read())
+    # create broker
+    Broker.objects.create(
+        certificate_pem=crypto.certificate_to_pem(cert),
+        key_pem=crypto.key_to_pem(key)
+    )
+
+
+def create_fixtures():
+    _ases()
+    _broker()
+    pass