Passkeys in the WebView builds: the apps name v3.coinos.io too, and a failed passkey sign-in no longer goes on to make a new one. Coinos Beta's passkey sign-in failed after the account was picked — "CredMan getCredential call failed … RP ID cannot be validated" (Pixel 9, 2026-11-06). An app's association with a site runs both ways: the site's assetlinks.json names the app (it did), and the app's manifest names the site through asset_statements meta-data — which the TWA has and the webview/fcm manifests didn't. They declare it now, and the shared asset_statements string carries get_login_creds beside handle_all_urls. And passkeyLogin rolled any sign-in failure into creating a passkey, so the validation error was followed by a second, failed create dialog: only NotAllowedError (how browsers report "no passkey here", or a dismissed sheet) leads to creating one now; any other error is shown

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

4 files changed, 18 insertions, 1 deletions

diff --git a/android/app/src/fcm/AndroidManifest.xml b/android/app/src/fcm/AndroidManifest.xml
index 71e75b9..640056c 100644
--- a/android/app/src/fcm/AndroidManifest.xml
+++ b/android/app/src/fcm/AndroidManifest.xml
@@ -16,6 +16,12 @@
       android:theme="@style/AppTheme"
       android:supportsRtl="true"
       android:usesCleartextTraffic="false">
+    <!-- the app's half of the association with v3.coinos.io (the site's half
+         is its assetlinks.json): passkeys for the site work in this app only
+         when both name each other -->
+    <meta-data
+        android:name="asset_statements"
+        android:resource="@string/asset_statements" />
     <activity
         android:name="io.coinos.app.MainActivity"
         android:exported="true"
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index 8132a82..77fa055 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -12,7 +12,7 @@
   <!-- must match the site's /.well-known/assetlinks.json for URL-bar-less TWA -->
   <string name="asset_statements">
     [{
-      \"relation\": [\"delegate_permission/common.handle_all_urls\"],
+      \"relation\": [\"delegate_permission/common.handle_all_urls\", \"delegate_permission/common.get_login_creds\"],
       \"target\": { \"namespace\": \"web\", \"site\": \"https://v3.coinos.io\" }
     }]
   </string>
diff --git a/android/app/src/webview/AndroidManifest.xml b/android/app/src/webview/AndroidManifest.xml
index 0942377..85a6f95 100644
--- a/android/app/src/webview/AndroidManifest.xml
+++ b/android/app/src/webview/AndroidManifest.xml
@@ -14,6 +14,12 @@
       android:theme="@style/AppTheme"
       android:supportsRtl="true"
       android:usesCleartextTraffic="false">
+    <!-- the app's half of the association with v3.coinos.io (the site's half
+         is its assetlinks.json): passkeys for the site work in this app only
+         when both name each other -->
+    <meta-data
+        android:name="asset_statements"
+        android:resource="@string/asset_statements" />
     <activity
         android:name="io.coinos.app.MainActivity"
         android:exported="true"
diff --git a/src/features/nostrlogin.js b/src/features/nostrlogin.js
index 1c227c3..a4cfa24 100644
--- a/src/features/nostrlogin.js
+++ b/src/features/nostrlogin.js
@@ -364,6 +364,11 @@ export function nostrLoginFeature(ctx) {
       await run(() => keySigner(sk));
     } catch (e) {
       if (/derive a wallet key/.test(e.message) || e.message === pass.LOCK_PASSKEY) { ui.nostrLoginError = e.message; render(); return; }
+      // Only "no passkey here" (NotAllowedError, as browsers report it) rolls
+      // into creating one; anything else is a failure to show, not a reason
+      // to make a second passkey (the Beta's "RP ID cannot be validated" went
+      // on to fail a create too, 2026-11-06).
+      if (e && e.name && e.name !== 'NotAllowedError') { ui.nostrLoginError = e.message || String(e); render(); return; }
       try {
         const sk = await pass.passkeyCreate();
         await run(() => keySigner(sk));