Use Fedify's helpers for quote authorization - #53
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BotKit implemented the FEP-044f protocol logic itself: building quote requests, authorization stamps, Accept/Reject/Delete activities, evaluating canQuote policies, and validating stamps. Fedify 2.4.0 now ships these as quoteInteraction in @fedify/interaction-controls, so BotKit uses that instead and gets Fedify's fixes for free. Persistence, delivery, visibility checks, and moderation stay in BotKit. Where Fedify's semantics differ, BotKit keeps its own behavior through small adapters: - A target without a canQuote rule is evaluated against the bot's quotePolicy instead of being denied. - Automatic approvals are evaluated before manual approvals, one axis at a time, so an explicit actor entry in manual approvals cannot override a broader automatic entry. - Incoming requests are verified on a normalized copy that fills in a missing quote attribution and lets quote win over a conflicting quoteUrl; the application still sees the original objects, and the requester is the resolved actor ID as before. - Follower lookup failures during policy evaluation are rethrown instead of becoming denials, so a transient repository error cannot revoke an existing authorization. - Stamps are verified according to how they were obtained: locally stored ones are trusted, and remote ones only when their ID is the one that was dereferenced. Two user-visible changes come with this. Stamp origins are now compared as FEP-fe34 origins, so stamps with opaque IDs are rejected. And the stamp ID named by an incoming Accept is captured before it is dereferenced, because getResult() replaced it with whatever ID the fetched document claimed, which let a same-origin substitute stamp approve a quote. The dependency is added to both deno.json and the pnpm catalog. Closes fedify-dev#52 Assisted-by: Claude Code:claude-opus-5-5 Assisted-by: Codex:gpt-6-astra
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Included review availability: This review used your included allowance. Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughBotKit now uses Fedify’s interaction-controls helpers to create quote activities, verify quote requests and authorizations, and evaluate quote policies. The changes update authorization checks and revocation handling, and add tests and changelog entries. ChangesFEP-044f quote interactions
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant Requester
participant BotImpl
participant quoteInteraction
participant Repository
Requester->>BotImpl: Send quote request
BotImpl->>quoteInteraction: Verify normalized request
quoteInteraction-->>BotImpl: Verification result
BotImpl->>Repository: Look up followers for policy evaluation
Repository-->>BotImpl: Follower lookup result
BotImpl-->>Requester: Send accepted or rejected response
Merge Risk: ⚪ Minimal · up to Cancellation now reaches quote-approval verification. No concrete remaining issue has been established that would prevent merging after normal checks. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change strengthens authorization identity checks and preserves important policy and failure-handling behavior. No introduced authorization bypass was established, but the delegated verifier and remote authentication behavior could not be fully verified. Retained concerns Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
Full details: Linked Issues checkExplanation Issue Resolution Restore a compatible
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Review comments at @packages/botkit/src/quote-authorization.ts:
- Around line 68-72: Update the exported verifyQuoteAuthorization function to
accept an optional AbortSignal, check it before and after
quoteInteraction.verifyAuthorization, and pass it to the Fedify helper if
supported. Update verifyQuoteApproval to forward its signal to the verifier, and
document the signal parameter and abort behavior.
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deno.lockis excluded by!**/*.lockpnpm-lock.yamlis excluded by!**/pnpm-lock.yaml
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CHANGES.mdchanges.d/botkit/quote-authorization-verification.mddeno.jsonpackages/botkit/package.jsonpackages/botkit/src/bot-impl.test.tspackages/botkit/src/bot-impl.tspackages/botkit/src/message-impl.tspackages/botkit/src/quote-authorization.test.tspackages/botkit/src/quote-authorization.tspackages/botkit/src/quote-impl.tspackages/botkit/src/session-impl.tspnpm-workspace.yaml
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verifyQuoteAuthorization() is async but took no AbortSignal, so verifyQuoteApproval() could pass its signal to lookupObject() but not on to the verification step. It now accepts an optional signal and checks it before and after calling Fedify's verifyAuthorization(), which has no signal of its own. fedify-dev#53 (comment) Assisted-by: Claude Code:claude-opus-5-5
Closes #52.
BotKit now uses
quoteInteractionfrom @fedify/interaction-controls for FEP-044f, with small adapters where Fedify's defaults differ from BotKit's.Keeping BotKit's behavior
Without a
canQuoterule on the target, the adapter derives one from the bot'squotePolicywithserializeQuotePolicy(). Fedify would deny the request.Policies are evaluated one axis at a time, automatic first. Evaluated together, an explicit actor in
manualApprovalswould override Public inautomaticApprovals, where BotKit has always approved automatically.verifyRequest()gets a clone of the request with a missing attribution filled in from the requester andquotepreferred over a conflictingquoteUrl. The bot still receives the original objects, and the requester remains the resolved actor's ID.matchesApprovalCollectionrethrows caughthasFollower()errors after evaluation. Fedify treats them as a denial, which would revoke an existing stamp on a transient database failure.verifyAuthorization()requires an authenticity check for objects passed directly. In quote-authorization.ts, that check trusts stamps from the repository, and remote stamps only when their ID is the one we dereferenced. That covers stamps embedded in anAccept, because Fedify's accessors refetch cross-origin embedded objects.Behavior changes
"null", are now rejected.#validateQuoteApprovalnow capturesaccept.resultIdbeforegetResult()replaces it with the fetched document's claimed ID. Previously, a same-origin stamp with a different ID could approve a quote.Both are in the changelog. One intentional change is not: Fedify skips the follower lookup when the requester or Public matches directly, so a failing lookup no longer aborts a request the policy accepts anyway.
Tests
New tests in bot-impl.test.ts cover each adapter and the
Acceptcases: same-origin, forged cross-origin, mismatched-ID, and unreachable stamps. All of them pass on the old code too, except the mismatched-ID test, which reproduces the bug, and the Public-before-followers test, which documents the lookup change. Existing quote tests pass unchanged.JSR published 2.4.0 less than a day ago, so updating deno.lock needed
--minimum-dependency-age=0; that also bumped@opentelemetry/*.Summary by CodeRabbit