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Mint-health transitions are 5-min-poll driven with escalating backoff — repeated mint outages make recovery exceed any test budget

Aperta
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#747 1 commento 0 reazioni 0 assegnatari Vedi su GitHub

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@Amperstrand ci sta già lavorando.

Dal 8/10/2026.

  • #777 di @Amperstrand — aperta

Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
35/100
Tipo di issue
Bug
Chiarezza
Abbastanza chiara
Stato di attività
Attiva
Stack tecnologico
go
Ambito
backend, networking

Direzione di ricerca

Start with the failing tests/api/test_merchant_provider.py and trace how mint probe and swap results reach wallet state and discovery health; the issue does not identify the relevant implementation files. Reproduce a mint block/unblock and restart in the local virtual lab, checking whether probe success refreshes wallet state and resets per-mint backoff. Done means discovery transitions promptly between degraded and full and repeated recovery cycles complete within the test window.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

Migrated from Amperstrand/tollgate-module-basic-go#87 as part of the fork retirement — OpenTollGate/tollgate-module-basic-go is the single source of truth; the fork issue carries the original discussion and any lab evidence. Retirement plan: see the tracking issue linked in the migration comment there.]

Evidence (local virtual lab, 2026-09-04, cdk-mintd 0.18.0 fakewallet)

Live probes during a failing tests/api/test_merchant_provider.py run:

  1. Wallet state vs prober disagree. After the mint work-dir is wiped and restarted (same mnemonic → same keysets), discovery served kind 21023 no-reachable-mints while:

    • proactive prober: mint probe: url=http://10.99.99.2:8383/v1/info status=200 ok=true (twice, 5 min apart)
    • curl http://10.99.99.2:8383/v1/info from the router: 200
    • tollgate status reported wallet_ok=true while discovery said degraded
      Only /etc/init.d/tollgate-wrt restart flipped discovery to kind 10021 (~10s). The wallet's cached mint state (wallet.db) is not re-validated on prober success.

  2. Health transitions ride the 300s proactive poll. iptables-blocking all mints does not flip discovery to degraded until the next probe cycle (up to 5 min); same for unblock→full. Test budgets of 180s expired before the first probe fired. (Worked around test-side: HEALTH_POLL_TIMEOUT 420, module timeout 900 — prta fix/local-lab-green 90bf9c6.)

  3. Recovery after repeated block/unblock cycles exceeds any test budget. In one file run: cycle 1 recovered well within 420s; cycles 2–4 did not recover within 420s (Service did not recover, swap-test stop reason test window ended, recovered=False). Escalating backoff on the mint URL after repeated failures is the likely mechanism; it does not reset on unblock.

Impact

  • Degraded/recovery tests are timing-flaky against any mint that restarts (mints DO restart — new deployments, CDK upgrades).
  • Discovery can serve no-reachable-mints while the mint is healthy, for up to the next probe cycle + wallet re-validation delay (currently: forever, absent a backend restart).

Suggested direction

  • Event-driven health transition: flip degraded/full immediately on swap/probe failure+recovery (probe success already detected per-cycle — propagate it to the wallet/discovery state).
  • Reset per-mint backoff when a probe or swap succeeds.
  • Re-validate cached wallet mint state when the prober reports ok=true but the wallet considers the mint down.
Lingua principale
Go
Stelle
12
Fork
14
Merge medio
1g 5h
PR unite (30g)
227

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