buzz/docs/admin/README.md

Deployment moderation dashboard

Buzz can expose a private, deployment-wide moderation dashboard from the existing relay process. It shows open moderation reports and recent product feedback.

Configure BUZZ_ADMIN_HOST to activate the dashboard. A private ingress limits access to the operator VPN or approved source IPs.

Required configuration:

BUZZ_ADMIN_HOST=admin.example.com
BUZZ_ADMIN_WEB_DIR=/srv/buzz/admin-web

Plus one of the authentication modes below.

Authentication

The admin API requires explicit authentication configuration. Setting only BUZZ_ADMIN_HOST activates the dashboard in the default nip98 mode. Configure the mode with BUZZ_ADMIN_AUTH, which accepts nip98 (default when unset) or disabled.

BUZZ_ADMIN_TOKEN is no longer recognised: token authentication was removed. Setting it is ignored with a startup warning, so a stale token variable cannot silently run a deployment on a removed auth path — remove it from the environment and use nip98 (or disabled behind a network boundary).

NIP-98 mode (BUZZ_ADMIN_AUTH=nip98, default)

Every /api/admin/v1 request must carry a NIP-98 HTTP Auth header containing a signed kind-27235 event. The signer's pubkey is resolved against a two-tier principal model — Operator or Moderator — that grants capabilities accordingly.

BUZZ_ADMIN_AUTH=nip98
RELAY_OPERATOR_PUBKEYS=<64-char hex pubkey>[,<64-char hex pubkey>...]

• A malformed RELAY_OWNER_PUBKEY alongside nip98 is a startup error (see owner fallback below).
• RELAY_OPERATOR_API_ORIGIN is not required to run the admin console. That origin is only used by the community-provisioning endpoints (POST /operator/communities), which share the RELAY_OPERATOR_PUBKEYS allowlist. When the pubkeys are set but the origin is not, the relay boots with a WARN and provisioning requests fail closed at request time until the origin is set — the admin console is unaffected.

Auto-discovery via NIP-11

When BUZZ_ADMIN_HOST is set, the relay advertises the admin API origin in its NIP-11 relay-information document under an optional admin_api field:

{ "admin_api": "https://admin.example.com" }

The value is the canonical origin scheme://host[:port] (no path), with the scheme derived by the same loopback rule as u-tag verification (http for localhost/127.x/[::1], else https). The field is omitted entirely when no admin surface is configured. Clients (such as the desktop console) read this to auto-discover the admin endpoint instead of requiring manual URL entry. IPv6 admin hosts must be bracketed ([::1], [::1]:3000); an unbracketed literal is a startup error.

Each request requires:

Authorization: Nostr <base64(JSON event)>

The event must be kind 27235, have a u tag matching the exact request URL (including any query string, e.g. https://admin.example.com/api/admin/v1/reports?status=open), a method tag matching the HTTP method, a valid Schnorr signature, and a created_at within ±60 seconds of now. Body-bearing mutations (POST, PUT, PATCH) additionally require a payload tag containing the SHA-256 hex digest of the raw request body. A deployment-scoped replay guard rejects reused event IDs; Redis failure fails closed.

Any auth failure (bad event, bad signature, expired, replay, unrecognised pubkey, missing/incorrect payload tag on mutations, duplicate Authorization header) returns 401 with WWW-Authenticate: Nostr. The dashboard's first-load probe treats any non-200 response as nip98 mode (only a 200 selects disabled mode), so a credential is always required unless the relay explicitly serves the unauthenticated surface.

The dashboard requires a NIP-07 browser extension (such as nos2x or Alby). If no extension is detected, the dashboard shows an installation screen. Once an extension is present, each API request is automatically signed with the principal's nostr key without any prompts.

Principal model: Operator and Moderator

The signer's pubkey is resolved to a principal with an effective role and a source that describes how the grant was established:

Resolution order	Role	Source
Pubkey is in RELAY_OPERATOR_PUBKEYS (config)	Operator	config
Pubkey equals RELAY_OWNER_PUBKEY and RELAY_OPERATOR_PUBKEYS is empty	Operator	owner_fallback
Pubkey has a row in the relay_operators DB table	Operator or Moderator	db
No grant found	—	403

Config always outranks DB: a DB row for a config-backed pubkey is ignored and never demotes the config grant. None never falls through as a role.

Owner fallback is an implicit Operator grant for self-hosters that do not yet have an operator configured. It activates only when the configured RELAY_OPERATOR_PUBKEYS list is empty, and it is evaluated from config at request time — staffing the roster cannot make it flap. Once any pubkey is added to RELAY_OPERATOR_PUBKEYS, the fallback deactivates. A malformed RELAY_OWNER_PUBKEY is a startup error (not warn-and-ignore): once the owner key can be a break-glass root, silently discarding it would be a lockout.

Capabilities by role

Capability	Operator	Moderator
Read reports, feedback, attachment bytes	✓	✓
Resolve reports (dismiss, escalate, delete, kick, ban, timeout)	✓	✓
Update feedback status	✓	✓
Manage operator roster (GET/PUT/DELETE /operators)	✓	✗

Capability checks are server-authoritative; the desktop console hides Staffing tab controls for Moderators as a UX convenience only.

Roster management

Operators manage the roster via the staffing endpoints (GET/PUT/DELETE /operators/{pubkey}). Staffing operations are only available in nip98 mode.

Config-backed pubkeys (RELAY_OPERATOR_PUBKEYS, owner fallback) cannot be modified through the API — PUT or DELETE against a config-backed pubkey returns 409 Conflict. A DB moderator row for a config-backed Operator pubkey is ignored; it never demotes the config grant.

GET /operators returns every effective principal with its effectiveRole and all contributing sources (config, owner_fallback, db).

Last-operator protection. When no config-backed operator is effective — RELAY_OPERATOR_PUBKEYS is empty and owner fallback is inactive — the roster is staffed entirely by DB operator rows. A demotion or delete that would remove the final DB operator is rejected transactionally with 409 Conflict ("add a replacement operator first"); the row is left unchanged. The safe way to hand off sole authority is the add-first transfer: PUT the replacement operator, then demote or delete the outgoing one. Config-backed operators are unaffected — while any config operator or owner fallback is effective, the DB roster may be emptied freely because config still guarantees an operator.

Disabled mode (BUZZ_ADMIN_AUTH=disabled)

Operators whose admin API is already protected at the network layer — for example by a corporate VPN such as WARP+Okta — can disable request authentication entirely:

BUZZ_ADMIN_AUTH=disabled

Only the exact value disabled is accepted.

In this mode the relay logs a WARN on every startup:

BUZZ_ADMIN_AUTH=disabled — the admin API is unauthenticated; the operator has
asserted that access is controlled at the network layer

The Host/Origin checks remain active as defense-in-depth. The dashboard detects that no credential is needed on first load (probe returns 200) and renders directly.

This mode relies entirely on the operator's network controls. If the admin API is reachable by untrusted clients, the entire moderation and feedback dataset is exposed. Use nip98 mode instead.

When using a reverse proxy in this mode, document the requirement and consider a proxy-injected shared secret or signed identity header for additional assurance.

Mode selection and error behaviour

BUZZ_ADMIN_AUTH accepts exactly nip98 or disabled. Any other non-empty value is a startup error (typo-proofing). BUZZ_ADMIN_TOKEN is no longer recognised and its presence is ignored with a startup warning regardless of the other variables:

Combination	Result
BUZZ_ADMIN_TOKEN set (with or without BUZZ_ADMIN_HOST)	warn + ignore
BUZZ_ADMIN_AUTH=nip98 with a malformed RELAY_OWNER_PUBKEY	startup error
BUZZ_ADMIN_AUTH junk value	startup error
BUZZ_ADMIN_AUTH without BUZZ_ADMIN_HOST	warn + ignore

Content Security Policy

Every admin-host response that carries the dashboard itself — the SPA document on each admin route, the hashed /assets/* bundle, and admin-host 404s — is served with a Content Security Policy response header, ADMIN_CSP in crates/buzz-relay/src/router.rs:

default-src 'none'; script-src 'self'; style-src 'self'; connect-src 'self'; img-src 'self' blob:; object-src 'none'; base-uri 'none'; frame-ancestors 'none'; form-action 'self'

It blocks inline and third-party script and restricts subresource and request destinations to the same origin, which closes the direct paths an injected script would use to exfiltrate credentials or data. It does not constrain top-level navigation, so it is a containment layer, not a substitute for keeping script off the origin. blob: is permitted for images only, for attachment previews. It is a response header rather than a <meta> tag because frame-ancestors is ignored in meta — that directive is the dashboard's authoritative frame protection, superseding the X-Frame-Options: DENY the JSON API sends. The policy applies to the admin host only; the public web bundle keeps its own headers.

The exact admin Host and matching browser Origin are still required in both auth modes, but they are defense-in-depth, not the primary access control. HTTPS and a private ingress remain required: in nip98 mode the signed credential travels in the Authorization header; in network-layer mode the VPN/firewall boundary is the only access control.

When the UI runs in a separate pod, proxy /api/admin/v1/* to the relay while preserving the admin Host header and (in nip98 mode) the client's Authorization header. A NetworkPolicy grants the admin pod access to that relay path.

Operator migration

Upgrading from a pre-auth release (Buzz prior to the introduction of this BUZZ_ADMIN_HOST requirement): any deployed relay with BUZZ_ADMIN_HOST set boots in nip98 mode after upgrade unless BUZZ_ADMIN_AUTH=disabled is set. Choose the mode that fits your deployment:

• Nostr principal model (default): set BUZZ_ADMIN_AUTH=nip98 (or leave it unset) and populate RELAY_OPERATOR_PUBKEYS with at least one operator pubkey (or rely on owner fallback if RELAY_OWNER_PUBKEY is already set) in your deploy config, then roll the new version. In a single config rollout, both set BUZZ_ADMIN_AUTH=nip98 and add the operator pubkey(s) — never split these across separate rollouts, as a mode-flip without operators configured leaves no-one able to authenticate.
• Network-layer mode (e.g. Block's bb-public behind WARP+Okta): set BUZZ_ADMIN_AUTH=disabled in your deploy config, then roll the new version.

Upgrading from a token-mode release: token authentication was removed. Remove BUZZ_ADMIN_TOKEN from the environment — leaving it set is ignored with a startup warning — and adopt nip98 (populate RELAY_OPERATOR_PUBKEYS) or disabled before rolling the new version.

Upgrading from the previous BUZZ_ADMIN_INSECURE_NO_AUTH=true variable: replace it with BUZZ_ADMIN_AUTH=disabled. Behavior is identical; the old variable is no longer recognised.

Relays without BUZZ_ADMIN_HOST are completely unaffected, except that a lingering BUZZ_ADMIN_TOKEN now logs a startup warning and must be removed.

Any non-browser client of /api/admin/v1 (monitoring probes, scripts, cron jobs) must sign each request with a NIP-98 Authorization: Nostr header after the upgrade, unless the deployment runs in disabled mode. The dashboard handles itself. If a reverse proxy strips or rewrites Authorization headers, the dashboard breaks post-upgrade in nip98 mode — check proxy configuration before rolling.

Local development

For local review, run just admin-seed before just admin. just admin defaults to BUZZ_ADMIN_AUTH=disabled, so the dashboard renders without a credential. The seed command also uploads real image and diagnostic fixtures to local MinIO. Feedback search and filters run over the bounded browser result set. The feedback status control (new/reviewed/archived) is server-backed: in nip98 mode it PATCHes the relay and adopts the returned status, so every operator sees the same state; in disabled mode it renders as a read-only badge because the server rejects mutations.

Routes

Read routes (Operator and Moderator)

• GET /api/admin/v1/probe
• GET /api/admin/v1/reports
• GET /api/admin/v1/reports/:id
• GET /api/admin/v1/feedback
• GET /api/admin/v1/feedback/:id
• GET /api/admin/v1/feedback/:id/attachments/:sha256

Action routes (Operator and Moderator)

• POST /api/admin/v1/reports/:id/resolve Body: {"action": "delete|kick|ban|timeout|dismiss|escalate", "expirationSecs": <number>, "reason": "<string>", "requestId": "<uuid>"} expirationSecs required for timeout, rejected for all others. Target/channel are always derived from server-owned report provenance. Response: {"status": "<terminal>", "activeAction": <action | null>}. Enforcement actions return the governing action record; dismiss/escalate return null.

  reason is PUBLIC. For delete/kick/ban/timeout the string is broadcast verbatim to the channel as the removal tombstone's public reason and sent verbatim to the affected user in a moderation DM. It is not sanitized, redacted, or mapped to a code. Never put private, internal, or report-derived context in reason — write only text that is safe for the room and the actioned user to read.

• POST /api/admin/v1/reports/:id/reopen Body: {"requestId": "<uuid>", "reason": "<string>"} Returns a terminal report (resolved, dismissed, or escalated) to open and records a durable reopen audit row. Idempotent on requestId: a retry after the report has been reopened (and possibly re-resolved) returns the same 200 without re-reopening. Returns {"status": "open"} on success, 409 if the report is not in a terminal state, 404 if it does not exist.

• POST /api/admin/v1/reports/:id/cancel Body: {"actionId": "<uuid>"} Cancels a pre-mutation failed enforcement action, returning the report to open. Cancel is the only recovery path for a failed action. actionId fences the cancel to exactly the action the client observed. Returns {"status": "open", "activeAction": <cancelled action>} — the embedded record is the last look at that action, since a subsequent detail read (report back to open) serves activeAction: null. Returns 409 if the action is not cancellable (already cancelled, superseded, or past the mutation point) — treat as "refresh detail".

• PATCH /api/admin/v1/feedback/:id Body: {"status": "new|reviewed|archived"}

Staffing routes (Operator only)

• GET /api/admin/v1/operators Returns every effective principal with its effectiveRole and all contributing sources (config, owner_fallback, db).
• PUT /api/admin/v1/operators/:pubkey Body: {"role": "operator|moderator"} Returns 409 if the target is config-backed.
• DELETE /api/admin/v1/operators/:pubkey Returns 409 if the target is config-backed.

Report reads accept optional communityId, status, reportType, targetKind, after, before, scope, and limit parameters. Limits are capped at 200. Feedback is a bounded newest-first summary from the existing product-feedback repository.

Escalation-scoped default

GET /reports with no status parameter returns only escalated reports — the escalation backstop the operator queue is meant to hold per VISION_MODERATION, where the severe class is the platform's to review rather than the community's. An explicit status=<open|resolved|dismissed|escalated> filter is always honored as given. Full visibility across every status stays available for platform-safety and legal review via scope=all, which lists reports regardless of status; scope accepts only all and is ignored when an explicit status is present.

Reports whose category is illegal bypass community triage entirely: they are ingested with status=escalated rather than open, so the severe class reaches the operator backstop without waiting for a community admin to forward it (per VISION_MODERATION, that class was never the community's to hold). Every other category still lands open. Auto-escalation only sets the queue status — it records no moderator decision and stamps no resolver, so an auto-escalated report is indistinguishable downstream from an admin-escalated one: the reopen route returns it to open on the same terms, keyed only on status, never on how the report became escalated.

Feedback attachment boundary

Feedback attachment bytes are available only through the feedback-scoped read route (GET /api/admin/v1/feedback/:id/attachments/:sha256, listed under Read routes above).

The route uses the same credential requirement (NIP-98 event, or network-layer boundary in disabled mode), private-ingress, exact admin Host, and same-origin boundary as the JSON API. It is not a generic media endpoint. The relay loads the feedback row, derives its community from server-owned provenance, verifies that host resolution still maps to the row's community_id, and requires the requested SHA-256 to match both the x field and source-community /media/ URL in that row's persisted imeta tag. It then reads the tenant-scoped media sidecar before accessing the shared content-addressed blob. Unknown feedback, unreferenced hashes, malformed paths, and cross-community substitutions all collapse to 404.

Product feedback is deployment-global operator evidence: when its source community is purged, the row's community_id is severed to NULL (the row survives, its provenance does not). List and detail reads still return such rows with communityId and communityHost as null. Their attachments, however, were purged with the tenant, so the attachment route fails closed to 404 for any severed feedback — there is no tenant to bind and no tenant-scoped media to serve.

Only GET and HEAD are routed. Community /media/* reads always require Blossom authorization and relay membership; the browser receives no reusable signed URL. Responses are uncached, nosniff, governed by a restrictive CSP, streamed from object storage, and non-previewable content retains attachment disposition. Successful reads produce a structured trace containing feedback ID, community ID, and attachment hash, but no feedback body or attachment URL.

The human trust boundary is the chosen auth mode plus the private admin ingress. Disabled mode provides no per-operator identity; anyone admitted to the dashboard can read attachments for feedback records they can access. NIP-98 mode provides per-operator attribution and individual revocability. Per-person identity in disabled mode requires authenticated operator identity at ingress/application level (for example an Okta-injected identity header).