A third Android build, fcm (io.coinos.beta, "Coinos Beta"): the wallet in its own WebView, as the webview build, with Firebase Cloud Messaging for push on phones with Google Play Services — no distributor app to install. A user on the TWA APK found launching slow next to Minibits (2026-11-05); measured on a Pixel 9, a WebView paints ~0.7 s sooner than a cold Chrome. This build installs beside the TWA for a side-by-side trial before deciding whether it replaces it. Fcm asks for the token and stores "fcm:<token>" as the push endpoint, which reaches the page down the UnifiedPush road (?up= on the next launch, or written straight into the page's localStorage once it has loaded, since the token arrives after the first load starts); nwcpush (coinosv3-server 0c50417) sends an fcm: endpoint through Firebase. FcmService hands a message's "body" to the same handler UnifiedPush messages use (PushReceiver.onPush: wake the wallet off-screen, notify unless it answered a silent request). Firebase is set up in code (CoinosApp → Fcm.init) from values build.gradle reads out of app/google-services.json (gitignored) — without it the build still builds and falls back to UnifiedPush. The webview and fdroid builds get a stub Fcm (src/nofcm) and carry no Google code; the notification permission is asked when Firebase or a distributor can deliver; CoinosHost.env reports app "fcm"

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VMan6Ts5Tktega8VbLg31q

1 files changed, 14 insertions, 0 deletions

diff --git a/android/app/src/nofcm/java/io/coinos/app/Fcm.java b/android/app/src/nofcm/java/io/coinos/app/Fcm.java
new file mode 100644
index 0000000..bb68bbc
--- /dev/null
+++ b/android/app/src/nofcm/java/io/coinos/app/Fcm.java
@@ -0,0 +1,14 @@
+package io.coinos.app;
+
+import android.content.Context;
+
+/**
+ * The WebView and F-Droid builds carry no Firebase: push there is UnifiedPush
+ * only. The fcm build's version of this class (src/fcm) is the real one.
+ */
+final class Fcm {
+  private Fcm() {}
+  static boolean available(Context c) { return false; }
+  /** @return whether Firebase will deliver this app's pushes (never, here) */
+  static boolean register(Context c, Runnable onEndpoint) { return false; }
+}