Improve datadog aggregate key for publisher checks (#52)

* Improve datadog aggregate key for publisher checks

* Add some comments

pyproject.toml

@@ -4,7 +4,7 @@ ignore_missing_imports = true
 
 [tool.poetry]
 name = "pyth-observer"
-version = "0.1.6"
+version = "0.1.7"
 description = "Alerts and stuff"
 authors = []
 readme = "README.md"

pyth_observer/event.py

@@ -11,6 +11,7 @@
 from loguru import logger
 
 from pyth_observer.check import Check
+from pyth_observer.check.publisher import PublisherCheck
 
 
 class Context(TypedDict):
@@ -35,8 +36,17 @@ async def send(self):
         # Publisher checks expect the key -> name mapping of publishers when
         # generating the error title/message.
         text = self.check.error_message()
+
+        # An example is: PriceFeedOfflineCheck-Crypto.AAVE/USD
+        aggregation_key = f"{self.check.__class__.__name__}-{self.check.state().symbol}"
+
+        if self.check.__class__.__bases__ == (PublisherCheck,):
+            # Add publisher key to the aggregation key to separate different faulty publishers
+            # An example would be: PublisherPriceCheck-Crypto.AAVE/USD-9TvAYCUkGajRXs....
+            aggregation_key += "-" + self.check.state().public_key
+
         event = DatadogAPIEvent(
-            aggregation_key=f"{self.check.__class__.__name__}-{self.check.state().symbol}",
+            aggregation_key=aggregation_key,
             title=text.split("\n")[0],
             text=text,
             tags=[