Support for FCM v1 API

README.md

@@ -78,11 +78,26 @@ For either type, it can accept:
 ### gcm
 
 This sends messages via Google/Firebase Cloud Messaging (GCM/FCM)
-and hence can be used to deliver notifications to Android apps. It
-expects the 'api_key' parameter to contain the 'Server key',
-which can be acquired from Firebase Console at:
-`https://console.firebase.google.com/project/<PROJECT NAME>/settings/cloudmessaging/`
+and hence can be used to deliver notifications to Android apps.
 
+The expected configuration depends on which version of the firebase api you
+wish to use.
+
+For legacy API, it expects:
+
+- the `api_key` parameter to contain the `Server key`,
+  which can be acquired from Firebase Console at:
+  `https://console.firebase.google.com/project/<PROJECT NAME>/settings/cloudmessaging/`
+
+For API v1, it expects:
+
+- the `api_version` parameter to contain `v1`
+- the `project_id` parameter to contain the `Project ID`,
+  which can be acquired from Firebase Console at:
+  `https://console.cloud.google.com/project/<PROJECT NAME>/settings/general/`
+- the `service_account_file` parameter to contain the path to the service account file,
+  which can be acquired from Firebase Console at:
+  `https://console.firebase.google.com/project/<PROJECT NAME>/settings/serviceaccounts/adminsdk`
 
 Using an HTTP Proxy for outbound traffic
 ----------------------------------------

changelog.d/361.feature

@@ -0,0 +1 @@
+Adds the ability to use the new FCM v1 API.

docs/applications.md

@@ -211,7 +211,14 @@ may be useful for reference.
 
 ### Firebase Cloud Messaging
 
-The client will receive a message with an FCM `data` payload with this structure:
+The client will receive a message with an FCM `data` payload with a structure depending on the api version used:
+
+Please note that fields may be truncated if they are large, so that they fit
+within FCM's limit.
+Please also note that some fields will be unavailable if you registered a pusher
+with `event_id_only` format.
+
+#### Legacy API
 
 ```json
 {
@@ -232,10 +239,24 @@ The client will receive a message with an FCM `data` payload with this structure
 }
 ```
 
-Please note that fields may be truncated if they are large, so that they fit
-within FCM's limit.
-Please also note that some fields will be unavailable if you registered a pusher
-with `event_id_only` format.
+#### API v1
+
+```json
+{
+  "event_id": "$3957tyerfgewrf384",
+  "type": "m.room.message",
+  "sender": "@exampleuser:example.org",
+  "room_name": "Mission Control",
+  "room_alias": "#exampleroom:example.org",
+  "sender_display_name": "Major Tom",
+  "content_msgtype": "m.text",
+  "content_body": "I'm floating in a most peculiar way."
+  "room_id": "!slw48wfj34rtnrf:example.org",
+  "prio": "high",
+  "unread": "2",
+  "missed_calls": "1"
+}
+```
 
 ### WebPush
 

docs/troubleshooting.md

@@ -207,7 +207,7 @@ EOF
 ```
 
 
-## Example of an FCM request
+## Example of an FCM request (Legacy API)
 
 HTTP data sent to `https://fcm.googleapis.com/fcm/send`:
 

pyproject.toml

@@ -78,6 +78,7 @@ dependencies = [
     "attrs>=19.2.0",
     "cryptography>=2.6.1",
     "idna>=2.8",
+    "google-auth>=2.27.0",
     "jaeger-client>=4.0.0",
     "matrix-common==1.3.0",
     "opentracing>=2.2.0",

stubs/google/auth/__init__.pyi

@@ -0,0 +1,3 @@
+from google.auth._default import default
+
+__all__ = ["default"]

stubs/google/auth/_default.pyi

@@ -0,0 +1,15 @@
+from typing import Optional
+
+from google.auth.transport.requests import Request
+
+class Credentials:
+    token = "token"
+
+    def refresh(self, request: Request) -> None: ...
+
+def default(
+    scopes: Optional[list[str]] = None,
+    request: Optional[str] = None,
+    quota_project_id: Optional[int] = None,
+    default_scopes: Optional[list[str]] = None,
+) -> tuple[Credentials, Optional[str]]: ...

stubs/google/auth/transport/__init__.pyi

@@ -0,0 +1,3 @@
+from google.auth.transport.requests import Request
+
+__all__ = ["Request"]

stubs/google/auth/transport/requests.pyi

@@ -0,0 +1 @@
+class Request: ...

stubs/google/oauth2/__init__.pyi

@@ -0,0 +1,3 @@
+from google.oauth2.service_account import Credentials
+
+__all__ = ["Credentials"]

stubs/google/oauth2/service_account.pyi

@@ -0,0 +1,16 @@
+from typing import Optional
+
+from google.auth.transport.requests import Request
+
+class Credentials:
+    token = "token"
+
+    def refresh(self, request: Request) -> None: ...
+    @staticmethod
+    def from_service_account_file(
+        service_account_file: str,
+        scopes: Optional[list[str]] = None,
+        request: Optional[str] = None,
+        quota_project_id: Optional[int] = None,
+        default_scopes: Optional[list[str]] = None,
+    ) -> Credentials: ...

sygnal.yaml.sample

@@ -205,9 +205,12 @@ apps:
 
   # This is an example GCM/FCM push configuration.
   #
-  #com.example.myapp.android:
+  #im.vector.app:
   #  type: gcm
-  #  api_key: your_api_key_for_gcm
+  #  #api_key: 
+  #  api_version: v1
+  #  project_id: project-id
+  #  service_account_file: /path/to/service_account.json
   #
   #  # This is the maximum number of connections to GCM servers at any one time
   #  # the default is 20.

sygnal/exceptions.py

@@ -39,6 +39,18 @@ def __init__(self, *args: object, custom_retry_delay: Optional[int] = None) -> N
         self.custom_retry_delay = custom_retry_delay
 
 
+class NotificationQuotaDispatchException(Exception):
+    """
+    To be used by pushkins for errors that are do to exceeding the quota
+    limits and are hopefully temporary, so the request should possibly be
+    retried soon.
+    """
+
+    def __init__(self, *args: object, custom_retry_delay: Optional[int] = None) -> None:
+        super().__init__(*args)
+        self.custom_retry_delay = custom_retry_delay
+
+
 class ProxyConnectError(ConnectError):
     """
     Exception raised when we are unable to start a connection using a HTTP proxy