Add relay command to Fedify CLI with getActorUri/getSharedInboxUri methods

CHANGES.md

@@ -143,6 +143,18 @@ To be released.
     incorrectly handled dependencies with registry prefixes (e.g., `npm:`),
     creating invalid specifiers in *deno.json*.  [[#460], [#496] by Hyeonseo Kim]
 
+ -  Added `fedify relay` command to run an ephemeral ActivityPub relay server.
+    [[#510], [#518] by Jiwon Kwon]
+
+     -  Supports both Mastodon and LitePub relay protocols via `--protocol`
+        option.
+     -  Provides optional persistent storage via `--persistent` option with
+        SQLite database.
+     -  Allows configuring subscription approval/rejection via `--accept-follow`
+        and `--reject-follow` options.
+     -  Tunnels the relay server to the public internet by default for external
+        access, with `--no-tunnel` option to run locally only.
+
 [Elysia]: https://elysiajs.com/
 [#374]: https://github.com/fedify-dev/fedify/issues/374
 [#397]: https://github.com/fedify-dev/fedify/issues/397
@@ -154,11 +166,13 @@ To be released.
 [#458]: https://github.com/fedify-dev/fedify/pull/458
 [#460]: https://github.com/fedify-dev/fedify/issues/460
 [#496]: https://github.com/fedify-dev/fedify/pull/496
+[#510]: https://github.com/fedify-dev/fedify/issues/510
+[#518]: https://github.com/fedify-dev/fedify/pull/518
 
 ### @fedify/relay
 
  -  Created ActivityPub relay integration as the *@fedify/relay* package.
-    [[#359], [#459], [#471], [#490] by Jiwon Kwon]
+    [[#359], [#459], [#471], [#490], [#510], [#518] by Jiwon Kwon]
 
      -  Added `Relay` interface defining the common contract for relay
         implementations.
@@ -176,6 +190,8 @@ To be released.
 [#459]: https://github.com/fedify-dev/fedify/pull/459
 [#471]: https://github.com/fedify-dev/fedify/pull/471
 [#490]: https://github.com/fedify-dev/fedify/pull/490
+[#510]: https://github.com/fedify-dev/fedify/issues/510
+[#518]: https://github.com/fedify-dev/fedify/pull/518
 
 ### @fedify/vocab-tools
 

docs/manual/relay.md

@@ -55,7 +55,7 @@ import { MemoryKvStore } from "@fedify/fedify";
 
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   name: "My ActivityPub Relay",
   subscriptionHandler: async (ctx, actor) => {
     // Approve all subscriptions
@@ -74,7 +74,7 @@ import { MemoryKvStore } from "@fedify/fedify";
 
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   name: "My ActivityPub Relay",
   subscriptionHandler: async (ctx, actor) => {
     // Approve all subscriptions
@@ -97,7 +97,7 @@ import { serve } from "@hono/node-server";
 
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   name: "My ActivityPub Relay",
   subscriptionHandler: async (ctx, actor) => {
     // Approve all subscriptions
@@ -130,8 +130,8 @@ Configuration options
 :   A [`KvStore`](./kv.md) for storing subscriber information and cryptographic
     keys.
 
-`domain`
-:   The domain name where the relay is hosted. Defaults to `"localhost"`.
+`origin` (required)
+:   The origin URL where the relay is hosted (e.g., `"https://relay.example.com"`).
 
 `name`
 :   Display name for the relay actor. Defaults to `"ActivityPub Relay"`.
@@ -146,7 +146,7 @@ Configuration options
     // ---cut-before---
     const relay = createRelay("mastodon", {
       kv: new MemoryKvStore(),
-      domain: "relay.example.com",
+      origin: "https://relay.example.com",
       queue: new InProcessMessageQueue(),
       subscriptionHandler: async (ctx, actor) => true,
     });
@@ -207,7 +207,7 @@ import { MemoryKvStore } from "@fedify/fedify";
 // ---cut-before---
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   subscriptionHandler: async (ctx, actor) => true,
 });
 ~~~~
@@ -225,7 +225,7 @@ import { MemoryKvStore } from "@fedify/fedify";
 // ---cut-before---
 const relay = createRelay("litepub", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   subscriptionHandler: async (ctx, actor) => true,
 });
 ~~~~
@@ -243,8 +243,8 @@ The subscription URL differs between Mastodon-style and LitePub-style relays:
 
 | Relay type   | Subscription URL                       | Example                           |
 |--------------|----------------------------------------|-----------------------------------|
-| `"mastodon"` | Inbox URL: `https://{domain}/inbox`    | `https://relay.example.com/inbox` |
-| `"litepub"`  | Actor URL: `https://{domain}/actor`    | `https://relay.example.com/actor` |
+| `"mastodon"` | Inbox URL: `{origin}/inbox`            | `https://relay.example.com/inbox` |
+| `"litepub"`  | Actor URL: `{origin}/actor`            | `https://relay.example.com/actor` |
 
 For more details on the protocol differences, see [FEP-ae0c].
 
@@ -295,7 +295,7 @@ import { MemoryKvStore } from "@fedify/fedify";
 // ---cut-before---
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   subscriptionHandler: async (ctx, actor) => true,  // Accept all
 });
 ~~~~
@@ -310,7 +310,7 @@ const blockedDomains = ["spam.example", "blocked.example"];
 
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   subscriptionHandler: async (ctx, actor) => {
     const domain = new URL(actor.id!).hostname;
     if (blockedDomains.includes(domain)) {
@@ -345,7 +345,7 @@ import { createRelay } from "@fedify/relay";
 import { MemoryKvStore } from "@fedify/fedify";
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   subscriptionHandler: async (ctx, actor) => true,
 });
 // ---cut-before---
@@ -365,7 +365,7 @@ import { createRelay } from "@fedify/relay";
 import { MemoryKvStore } from "@fedify/fedify";
 const relay = createRelay("mastodon", {
   kv: new MemoryKvStore(),
-  domain: "relay.example.com",
+  origin: "https://relay.example.com",
   subscriptionHandler: async (ctx, actor) => true,
 });
 // ---cut-before---

packages/cli/package.json

@@ -45,6 +45,7 @@
   },
   "dependencies": {
     "@fedify/fedify": "workspace:*",
+    "@fedify/relay": "workspace:*",
     "@fedify/sqlite": "workspace:*",
     "@fedify/vocab-runtime": "workspace:*",
     "@fedify/vocab-tools": "workspace:*",
@@ -84,7 +85,7 @@
   },
   "scripts": {
     "codegen": "deno task -f @fedify/fedify codegen",
-    "build": "pnpm run codegen && pnpm run --filter fedify build && pnpm run --filter sqlite build && tsdown",
+    "build": "pnpm run codegen && pnpm run --filter fedify build && pnpm run --filter relay build && pnpm run --filter sqlite build && tsdown",
     "prepack": "pnpm run build",
     "prepublish": "pnpm run build",
     "test": "pnpm build && node --test --experimental-transform-types 'src/**/*.test.ts' '!src/init/test/**'",

packages/cli/src/inbox.tsx

@@ -11,7 +11,6 @@ import {
   Endpoints,
   Follow,
   generateCryptoKeyPair,
-  getActorHandle,
   Image,
   isActor,
   lookupObject,
@@ -46,7 +45,7 @@ import { ActivityEntryPage, ActivityListPage } from "./inbox/view.tsx";
 import { recordingSink } from "./log.ts";
 import { tableStyle } from "./table.ts";
 import { spawnTemporaryServer, type TemporaryServer } from "./tempserver.ts";
-import { colors } from "./utils.ts";
+import { colors, matchesActor } from "./utils.ts";
 
 /**
  * Context data for the ephemeral ActivityPub inbox server.
@@ -256,22 +255,6 @@ const activities: ActivityEntry[] = [];
 
 const acceptFollows: string[] = [];
 
-async function acceptsFollowFrom(actor: Actor): Promise<boolean> {
-  const actorUri = actor.id;
-  let actorHandle: string | undefined = undefined;
-  if (actorUri == null) return false;
-  for (let uri of acceptFollows) {
-    if (uri === "*") return true;
-    if (uri.startsWith("http:") || uri.startsWith("https:")) {
-      uri = new URL(uri).href; // normalize
-      if (uri === actorUri.href) return true;
-    }
-    if (actorHandle == null) actorHandle = await getActorHandle(actor);
-    if (actorHandle === uri) return true;
-  }
-  return false;
-}
-
 const peers: Record<string, Actor> = {};
 
 function createSendDeleteToPeers(
@@ -329,7 +312,7 @@ federation
       const { identifier } = parsed;
       const follower = await activity.getActor();
       if (!isActor(follower)) return;
-      const accepts = await acceptsFollowFrom(follower);
+      const accepts = await matchesActor(follower, acceptFollows);
       if (!accepts || activity.id == null) {
         logger.debug("Does not accept follow from {actor}.", {
           actor: follower.id?.href,

packages/cli/src/mod.ts

@@ -11,6 +11,7 @@ import { lookupCommand, runLookup } from "./lookup.ts";
 import { nodeInfoCommand, runNodeInfo } from "./nodeinfo.ts";
 import { runTunnel, tunnelCommand } from "./tunnel.ts";
 import { runWebFinger, webFingerCommand } from "./webfinger/mod.ts";
+import { relayCommand, runRelay } from "./relay.ts";
 
 const command = or(
   initCommand,
@@ -20,6 +21,7 @@ const command = or(
   nodeInfoCommand,
   tunnelCommand,
   generateVocabCommand,
+  relayCommand,
 );
 
 async function main() {
@@ -48,6 +50,9 @@ async function main() {
   if (result.command === "generate-vocab") {
     await runGenerateVocab(result);
   }
+  if (result.command === "relay") {
+    await runRelay(result);
+  }
 }
 
 await main();