RAHHH

backend/lib/python3.12/site-packages/autobahn/asyncio/xbr/__init__.py

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+###############################################################################
+#
+# The MIT License (MIT)
+#
+# Copyright (c) typedef int GmbH
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+###############################################################################
+
+try:
+    from autobahn import xbr
+    HAS_XBR = True
+except:
+    HAS_XBR = False
+
+
+if HAS_XBR:
+    import uuid
+    import asyncio
+    import txaio
+    from autobahn.util import hl
+    from autobahn.xbr._interfaces import IProvider, ISeller, IConsumer, IBuyer
+
+    def run_in_executor(*args, **kwargs):
+        return asyncio.get_running_loop().run_in_executor(None, *args, **kwargs)
+
+    class SimpleBlockchain(xbr.SimpleBlockchain):
+        backgroundCaller = run_in_executor
+
+    class KeySeries(xbr.KeySeries):
+        log = txaio.make_logger()
+
+        def __init__(self, api_id, price, interval, on_rotate=None):
+            super().__init__(api_id, price, interval, on_rotate)
+            self.running = False
+
+        async def start(self):
+            """
+            Start offering and selling data encryption keys in the background.
+            """
+            assert not self.running
+
+            self.log.info('Starting key rotation every {interval} seconds for api_id="{api_id}" ..',
+                          interval=hl(self._interval), api_id=hl(uuid.UUID(bytes=self._api_id)))
+            self.running = True
+
+            async def rotate_with_interval():
+                while self.running:
+                    await self._rotate()
+                    await asyncio.sleep(self._interval)
+
+            asyncio.create_task(rotate_with_interval())
+
+        def stop(self):
+            """
+            Stop offering/selling data encryption keys.
+            """
+            if not self.running:
+                raise RuntimeError('cannot stop {} - not currently running'.format(self.__class__.__name__))
+
+            self.running = False
+
+    class SimpleSeller(xbr.SimpleSeller):
+        """
+        Simple XBR seller component. This component can be used by a XBR seller delegate to
+        handle the automated selling of data encryption keys to the XBR market maker.
+        """
+        xbr.SimpleSeller.KeySeries = KeySeries
+
+    class SimpleBuyer(xbr.SimpleBuyer):
+        pass
+
+    ISeller.register(SimpleSeller)
+    IProvider.register(SimpleSeller)
+    IBuyer.register(SimpleBuyer)
+    IConsumer.register(SimpleBuyer)