isAuthFailure

Whether the binary is reporting that the token it was handed was rejected.

The binary makes its own HTTP calls, so a 401 on an MPC operation is never visible to io.portalhq.android.utils.PortalRequests the way every other Portal-authenticated request's is. It comes back as this ID instead — the client emits it from exactly one place, the 401 branch of its upgrade-response mapping — which makes this the same signal one layer up, not an inference from it.