Make isAuthenticated in middleware fail more loudly.

CHANGELOG.md

@@ -1,10 +1,15 @@
 # Changelog
 
-## 0.0.78
+## Unreleased
 
 - Add support for
   [custom OAuth callback and sign-in URLs](https://labs.convex.dev/auth/advanced#custom-callback-and-sign-in-urls)
 
+- Next.js middleware function `isAuthenticated` fails more loudly; previously it
+  returned false in the case of a Convex backend that didn't expose an endpoint
+  called `auth:isAuthenticated`, now it throws an error. This should help people
+  with the migration required for 0.0.76.
+
 ## 0.0.77
 
 - Fix syntax of an import to work with convex-test.

src/nextjs/server/index.tsx

@@ -308,7 +308,14 @@ async function isAuthenticated(token: string | null): Promise<boolean> {
       {},
       { token: token },
     );
-  } catch {
+  } catch (e: any) {
+    if (e.message.includes("Could not find public function")) {
+      throw new Error(
+        "Server Error: could not find api.auth.isAuthenticated. convex-auth 0.0.76 introduced a new export in convex/auth.ts. Add `isAuthenticated` to the list of functions returned from convexAuth(). See convex-auth changelog for more https://github.com/get-convex/convex-auth/blob/main/CHANGELOG.md",
+      );
+    } else {
+      console.log("Returning false from isAuthenticated because", e);
+    }
     return false;
   }
 }