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Paul LütznerandClaude Opus 5
b38aaac04e
v0.2.31 could not mint a token at all on a TrueNAS install, and nothing an operator set would have fixed it. That release bound `iss` and `aud` to MERCURE_PUBLIC_URL. truenas.compose.yaml leaves that BLANK ON PURPOSE — the setup screen asks for the public URL on first boot and stores it in the database, which is long after the hub container has had to be told what to trust. An empty issuer is not a weak issuer: the factory refuses it outright with `The "iss" additional claim is required by RFC 9068 access tokens`, so there was no subscriber cookie, every publish threw, and the symptom was a red dot indistinguishable from a hub that was simply down. The mistake underneath was deriving a value that must exist at CONTAINER START from one that only exists after SETUP. So it is a literal now, shared by the application and every compose file, and no installation has to know it. An identifier does not have to resolve — `.invalid` is reserved by RFC 2606 for exactly this — and all that matters is that both halves agree on the same string, which a literal guarantees and a derived value cannot. The same string everywhere costs nothing: the signing secret is generated per installation, so one install's token has never been usable against another's hub however it identifies itself. truenas.compose.yaml had been left behind twice more. It still carried the "/healthz" check that v0.2.30 replaced in the other two files, so its hub would have gone unhealthy the moment the image moved; and it had no pull_policy, so the image never moved at all. That is the combination that produced the original report: an application on the 1.0 protocol talking to a 0.x hub that nothing had ever pulled. The regression test empties MERCURE_PUBLIC_URL rather than reading the config, because what broke was the derivation — a test that read the same placeholder the code did would have passed throughout. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>