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Raise relay token and policy TTL from 300s to 3600s - #10731
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An always-on endpoint re-minted its endpoint-bound relay JWT every ~4 minutes forever (~288 requests/day/device). Raise RELAY_TOKEN_TTL_SECONDS to 3600 and RELAY_TOKEN_REFRESH_LEAD_SECONDS to 300, cutting steady state to 24 refreshes/day. RELAY_POLICY_TTL_SECONDS rises to 3600 with it: the signed policy ships in the same /api/relay/token response and the client re-verifies the cached policy's exp on every load, so a 300s policy with a 3600s token would strand clients with an expired policy between refreshes. The client verifier accepts policy lifetimes up to 7 days, and the route's own credential invariant already allowed TTLs up to 24h. The add-before-remove catalog rotation overlap tracks the policy TTL and therefore rises from 300s to 3600s. Investigation note: the iroh README's mint quotas (3/endpoint/10min, 12/endpoint/day, 100/account/day) never guarded this route. They guarded only the legacy n0-minter broker route /api/devices/iroh/relay-token (24h tokens, 2 mints/day steady state), and #9269 removed them entirely. The README paragraph is updated to match; no quota re-keying is needed because no server-side quota remains.
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📝 WalkthroughWalkthroughRelay policy and token lifetimes increase from five minutes to one hour. Token refresh timing and related tests are updated. Broker quota documentation now describes the remaining safeguards and optional firewall limits. ChangesRelay lifetime updates
Broker quota documentation
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The PR extends relay credentials and policy lifetime to one hour, but one test fixture still models a five-minute policy expiry, leaving coverage inconsistent with the shipped contract. This is a bounded, mergeable risk requiring explicit owner follow-up. Suggested reviewers: 🚥 Pre-merge checks | ✅ 23 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (23 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 5 files. (2 skipped: 2 unsupported.) Full details: Cmux Swift Actor IsolationExplanation PASS: The pull request changes only Markdown documentation, TypeScript relay constants/comments, and TypeScript tests. Full details: Cmux Swift Blocking RuntimeExplanation PASS: The pull-request diff changes only TypeScript and Markdown files. It contains no Swift production changes, so it does not introduce or expand any Swift blocking or timing-based synchronization primitive covered by the check. Full details: Cmux Browser Automation Off-MainExplanation PASS: The pull request changes only relay TTL code, relay documentation, and related web tests. The parent-to-HEAD diff contains no Full details: Cmux Expensive Synchronous LoadExplanation PASS: The pull request changes only two TypeScript files, two Markdown files, and two TypeScript test files. Full details: Cmux Cache Substitution CorrectnessExplanation PASS. The diff against origin/main changes relay TTL constants, comments, documentation, and derived test expectations. It does not replace an authoritative read with a cached or opportunistic value, and it does not modify a persistence, history, undo, or snapshot path. The cache references are unchanged signing-key memoization and documentation about client policy expiry. Full details: Cmux No Hacky SleepsExplanation PASS. The pull-request diff adds no Full details: Cmux Algorithmic ComplexityExplanation PASS. The production diff changes only relay TTL constants and comments. Full details: Cmux Swift ConcurrencyExplanation PASS. The pull request changes only Markdown and TypeScript files: the parent-to-HEAD diff contains seven paths, and no Full details: Cmux Swift `@Concurrent`Explanation PASS: The pull request changes only Markdown and TypeScript files. The exact diff contains no Swift files and no Swift concurrency changes such as Full details: Cmux Swift Package BoundariesExplanation PASS: The PR diff changes only Markdown and TypeScript files plus TypeScript tests. It introduces no Swift, SwiftPM manifest, or Swift app-target changes. Therefore it cannot violate the Swift package boundary rule. Full details: Cmux Swiftpm LockfilesExplanation PASS: The pull request changes only relay documentation, TypeScript service code, and tests. The diff contains no Full details: Cmux Swift LoggingExplanation PASS: The pull request changes seven documentation, TypeScript, and test files. The exact diff contains no Full details: Cmux User-Facing Error PrivacyExplanation PASS. The production diff changes relay TTL constants and comments only. It does not add or change user-facing error text, alerts, command output, recovery copy, or API error bodies. The relay HTTP error mapper is identical to the parent revision and continues to return generic codes such as Full details: Cmux Full InternationalizationExplanation PASS: The diff changes relay TTL configuration and machine-readable JWT/policy fields, not localized UI or response copy. The added wording in Full details: Cmux Swiftui State LayoutExplanation PASS — The pull request changes only Markdown and TypeScript files. The verified diff contains no Swift or SwiftUI files and no SwiftUI state/layout constructs. Therefore the SwiftUI state-layout failure conditions are not applicable. Full details: Cmux Architecture RethinkExplanation PASS: The pull request does not introduce a Swift architecture change. The parent-to-HEAD diff changes only TypeScript, Markdown, and test files. The changes update relay TTL constants, comments, documentation, and derived test expectations. No Swift files or forbidden timing, blocking, state-owner, duplicate-wiring, or UI-lifecycle patterns were added. Full details: Cmux Swift Auxiliary Window Close ShortcutsExplanation PASS: The pull request changes only seven Markdown/TypeScript files and tests. The exact commit diff contains no Full details: Cmux Source ArtifactsExplanation PASS — The PR diff from its merge base contains only seven modified paths under Full details: Cmux No Test Or Debug Seam In Production SourceExplanation PASS: The pull request changes only Markdown and TypeScript files under Full details: Description checkExplanation The description provides a detailed summary, rationale, migration impact, rate-limit analysis, and revert guidance. It does not follow the required template because it lacks dedicated Testing, Demo Video, Review Trigger, and Checklist sections, including explicit local-testing and review-status confirmations. ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Greptile SummaryThe PR extends managed relay credentials and signed relay policies from five minutes to one hour while retaining a five-minute refresh window.
Confidence Score: 5/5The PR appears safe to merge. No blocking failure remains. Important Files Changed
Sequence DiagramsequenceDiagram
participant Client
participant API as Relay Token API
participant Relay
Client->>API: Request endpoint-bound credential
API-->>Client: Token + policy (valid 1 hour)
Client->>Relay: Connect using signed credential
Relay-->>Client: Authenticated relay session
Note over Client,API: Refresh begins about 5 minutes before expiry
Reviews (3): Last reviewed commit: "test(relay): align stub policy exp with ..." | Re-trigger Greptile |
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| export const RELAY_TOKEN_TTL_SECONDS = 3_600; // the client refreshes before expiry | ||
| export const RELAY_TOKEN_REFRESH_LEAD_SECONDS = 300; |
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When an installed client predating relayCredentials support calls this endpoint, its decoder ignores the new array and falls back to the legacy token/ttlSeconds fields that are still emitted by this route; CmxIrohTrustBrokerClient.relayTokenResponse currently requires ttlSeconds == 300 in that fallback path, so the new 3600 value makes the response invalid and prevents those clients from obtaining relay connectivity. Either retain the legacy TTL for that compatibility path or version/negotiate the contract before raising it.
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The db-lane rotation test pinned the 300s overlap as literal timestamps and would fail against the new 3600s RELAY_ROTATION_MIN_OVERLAP_SECONDS. Compute the removal times from the constant instead.
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Inline comments:
In `@web/tests/relay-token-route.test.ts`:
- Around line 106-108: Update the PAYLOAD fixture’s exp value to represent a
one-hour offset from iat, matching the ttlSeconds and
mintManagedRelayCredentials contract. If the test exposes deps().signedPolicy,
add an assertion confirming the returned policy payload uses that one-hour
expiry.
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docs/iroh-app-transport-architecture.mdweb/app/api/relay/token/route.tsweb/services/iroh/README.mdweb/services/relay/catalog.tsweb/services/relay/token.tsweb/tests/relay-policy.test.tsweb/tests/relay-token-route.test.ts
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| export const RELAY_TOKEN_REFRESH_LEAD_SECONDS = 60; | ||
| // One hour keeps the credential device-bound and revocable-by-rotation while | ||
| // cutting an always-on endpoint from ~288 refreshes/day (at 300 s) to 24. | ||
| export const RELAY_TOKEN_TTL_SECONDS = 3_600; // the client refreshes before expiry |
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When a client predating relayCredentials support calls this endpoint, it ignores the new array and falls back to the still-emitted token/ttlSeconds fields. The current client fallback still requires ttlSeconds == 300, so changing this shared constant to 3600 makes those responses invalid and prevents older clients from obtaining relay connectivity. Fresh evidence in the current tree is the hard-coded legacy check in CmxIrohTrustBrokerClient.relayTokenResponse; retain the legacy TTL for that compatibility path or version/negotiate the contract before raising it.
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Both review findings addressed: Codex P1 (legacy CodeRabbit (stub |
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Sequencing note from the local autoreview gate: the P2 finding (1 h tokens widen the revocation window because relays verify offline) is correct as long as the fleet has no relay-side revocation. manaflow-ai/cmux-relay#9 adds exactly that (broker allow-hook with revocation kick). Merge order is therefore: cmux-relay#9 rolled out to the fleet first, then this PR. Holding this PR until that rollout completes. |
teamleaderleo
added
S2: major
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Still live. Holding this TTL increase until cmux-relay#9 is deployed, as documented in the PR. |
This branch has not been deployed
2 participants
Quota finding
The suspected contradiction behind #8531 (300 s tokens needing ~288 refreshes/day vs a 12/endpoint/day mint quota) does not exist, on two independent grounds. First, the quotas documented in
web/services/iroh/README.md(3 relay mints per endpoint per 10 minutes, 12 per endpoint per day, 100 per account per day) were enforced only inIrohRepository.reserveRelayIssuance, reached solely through the trust broker'sissueRelayToken, which serves the legacy n0-minter routePOST /api/devices/iroh/relay-tokenand registration bootstrap. Tokens on that path haveIROH_RELAY_TOKEN_LIFETIME_SECONDS = 24 hand a 12 h refresh, so its steady state is 2 mints per endpoint per day and 12/day could never be exhausted by an always-on endpoint. The 300 s fleet routePOST /api/relay/token, which every current client uses, never calledreserveRelayIssuanceand was never subject to those quotas; its only gate is the optional Vercel firewall rule with per-endpoint, per-phase, per-minute-bucket partitions built for the 4-minute cadence. Second, #9269 removed every broker quota on Jul 31, so no DB-side quota remains anywhere. The README was stale; this PR fixes it. Because the quotas could never exhaust a live endpoint, there is no failing-test regression commit: there is no quota code left to demonstrate exhaustion against.What changed
RELAY_TOKEN_TTL_SECONDS300 → 3600 andRELAY_TOKEN_REFRESH_LEAD_SECONDS60 → 300 (web/services/relay/token.ts). Steady state falls from ~288 to 24 refreshes per endpoint per day, with a 5-minute retry window before expiry.RELAY_POLICY_TTL_SECONDS300 → 3600 (web/services/relay/catalog.ts). The signed policy ships in the same/api/relay/tokenresponse as the credential andCmxIrohRelayPolicyCache.loadre-verifies the cached policy'sexpon every load, so keeping the policy at 300 s under a 3600 s token would strand clients with an expired policy between refreshes. The client verifier (CmxIrohRelayPolicyVerifier) accepts lifetimes up to 7 days.RELAY_ROTATION_MIN_OVERLAP_SECONDStracks the policy TTL, so add-before-remove catalog rotations now require a 1-hour overlap instead of 5 minutes; that is an operational slowdown for fleet removals, not a client risk.web/services/iroh/README.md, the four-minute-renewal comment inweb/app/api/relay/token/route.ts, and two "five-minute" mentions indocs/iroh-app-transport-architecture.md.expinweb/tests/relay-policy.test.ts, minted-credentialexpiresAt/refreshAfter/ttlSecondsand tokenexpinweb/tests/relay-token-route.test.ts. RemainingttlSeconds: 300literals in that file are synthetic stub credentials exercisinghasExactCredentialSetinvariants and are independent of the constants. The db-lane rotation test (web/tests/iroh-db-behavior.test.ts) now derives its removal timestamps fromRELAY_ROTATION_MIN_OVERLAP_SECONDSinstead of pinning 300 s.Why 3600 s is safe
The token is a device-bound EdDSA JWT:
endpoint_idbinds it to the caller's own iroh key, so a leaked token cannot be replayed from another endpoint, and the relay requires the handshake-authenticated key to match. Revocation still works through binding revocation and policy/catalog rotation; the credential invariant in the route already accepted TTLs up to 24 h, and the client's refresh schedule is entirely server-driven (refreshAfter), so no client change is needed. The relay VMs verifyexpoffline and impose no lifetime cap that this change approaches.Rate limiting
No infra or env change is needed. The
CMUX_RELAY_TOKEN_RATE_LIMIT_IDfirewall partition key includes a per-minute bucket, so an hourly refresh cadence is strictly lighter than the 4-minute cadence the rule was provisioned for.CMUX_IROH_RATE_LIMIT_IDgates only the broker routes and is unaffected.Revert
The change is config-constant only (two TTL constants, comments, docs, and test literals derived from them). It reverts cleanly with
git revert; tokens and policies minted during the window simply age out at their signed expiry.Dictionary:
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@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Raises relay token and policy TTLs from 300s to 3600s and increases the refresh lead to 300s, reducing refreshes from ~288/day to 24/day and avoiding policy expiry between token renewals.
Migration
RELAY_ROTATION_MIN_OVERLAP_SECONDSand stub policy exp aligns with the new TTL.Written for commit 974e548. Summary will update on new commits.
Summary by CodeRabbit