Atproto sync package (bluesky-social#2752)

* first pass/port

* reworking

* authenticated commit parsing

* authenticate identity evts

* some testing

* tidy & add firehose to queue

* error handling

* fix test

* refactor sync queue + some tests

* fix race in sync queue

* rm firehose from syncqueue

* add tests for queue utils

* README

* lint readme

* filter before parsing

* pr feedback

* small fix

* changesets

* fix type

* Rework dataplane subscription (bluesky-social#2766)

* working sync package into appview subscription

* add restart method to subscription for tests

* fix another test

* tidy subscription utils/files

* remove dupe property

* tidy after merge

* fix start cursor on subscription

* tweak process full subscription logic

* fixes

.changeset/gorgeous-oranges-wink.md

@@ -0,0 +1,5 @@
+---
+"@atproto/sync": minor
+---
+
+Introduced initial sync package for consuming firehose (com.atproto.sync.subscribeRepos)

.changeset/silver-badgers-chew.md

@@ -0,0 +1,5 @@
+---
+"@atproto/repo": minor
+---
+
+Updated verifyProofs consumer method to verify Cid claims rather than record claims

packages/bsky/package.json

@@ -33,6 +33,7 @@
     "@atproto/identity": "workspace:^",
     "@atproto/lexicon": "workspace:^",
     "@atproto/repo": "workspace:^",
+    "@atproto/sync": "workspace:^",
     "@atproto/syntax": "workspace:^",
     "@atproto/xrpc-server": "workspace:^",
     "@bufbuild/protobuf": "^1.5.0",

packages/bsky/src/data-plane/server/db/migrations/20240829T211238293Z-simplify-actor-sync.ts

@@ -0,0 +1,23 @@
+import { Kysely } from 'kysely'
+
+export async function up(db: Kysely<unknown>): Promise<void> {
+  await db.schema.alterTable('actor_sync').dropColumn('commitDataCid').execute()
+  await db.schema.alterTable('actor_sync').dropColumn('rebaseCount').execute()
+  await db.schema.alterTable('actor_sync').dropColumn('tooBigCount').execute()
+  // Migration code
+}
+
+export async function down(db: Kysely<unknown>): Promise<void> {
+  await db.schema
+    .alterTable('actor_sync')
+    .addColumn('commitDataCid', 'varchar', (col) => col.notNull())
+    .execute()
+  await db.schema
+    .alterTable('actor_sync')
+    .addColumn('rebaseCount', 'integer', (col) => col.notNull())
+    .execute()
+  await db.schema
+    .alterTable('actor_sync')
+    .addColumn('tooBigCount', 'integer', (col) => col.notNull())
+    .execute()
+}

packages/bsky/src/data-plane/server/db/migrations/index.ts

@@ -42,3 +42,4 @@ export * as _20240723T220700077Z from './20240723T220700077Z-quotes-post-aggs'
 export * as _20240723T220703655Z from './20240723T220703655Z-quotes'
 export * as _20240801T193939827Z from './20240801T193939827Z-post-gate'
 export * as _20240808T224251220Z from './20240808T224251220Z-post-gate-flags'
+export * as _20240829T211238293Z from './20240829T211238293Z-simplify-actor-sync'

packages/bsky/src/data-plane/server/db/tables/actor-sync.ts

@@ -1,10 +1,7 @@
 export interface ActorSync {
   did: string
   commitCid: string
-  commitDataCid: string
   repoRev: string | null
-  rebaseCount: number
-  tooBigCount: number
 }
 
 export const tableName = 'actor_sync'

packages/bsky/src/data-plane/server/indexing/index.ts

@@ -5,7 +5,6 @@ import {
   readCarWithRoot,
   WriteOpAction,
   verifyRepo,
-  Commit,
   VerifiedRepo,
   getAndParseRecord,
 } from '@atproto/repo'
@@ -227,45 +226,25 @@ export class IndexingService {
     )
   }
 
-  async setCommitLastSeen(
-    commit: Commit,
-    details: { commit: CID; rebase: boolean; tooBig: boolean },
-  ) {
+  async setCommitLastSeen(did: string, commit: CID, rev: string) {
     const { ref } = this.db.db.dynamic
     await this.db.db
       .insertInto('actor_sync')
       .values({
-        did: commit.did,
-        commitCid: details.commit.toString(),
-        commitDataCid: commit.data.toString(),
-        repoRev: commit.rev ?? null,
-        rebaseCount: details.rebase ? 1 : 0,
-        tooBigCount: details.tooBig ? 1 : 0,
+        did,
+        commitCid: commit.toString(),
+        repoRev: rev ?? null,
       })
       .onConflict((oc) => {
-        const sync = (col: string) => ref(`actor_sync.${col}`)
         const excluded = (col: string) => ref(`excluded.${col}`)
         return oc.column('did').doUpdateSet({
           commitCid: sql`${excluded('commitCid')}`,
-          commitDataCid: sql`${excluded('commitDataCid')}`,
           repoRev: sql`${excluded('repoRev')}`,
-          rebaseCount: sql`${sync('rebaseCount')} + ${excluded('rebaseCount')}`,
-          tooBigCount: sql`${sync('tooBigCount')} + ${excluded('tooBigCount')}`,
         })
       })
       .execute()
   }
 
-  async checkCommitNeedsIndexing(commit: Commit) {
-    const sync = await this.db.db
-      .selectFrom('actor_sync')
-      .select('commitDataCid')
-      .where('did', '=', commit.did)
-      .executeTakeFirst()
-    if (!sync) return true
-    return sync.commitDataCid !== commit.data.toString()
-  }
-
   findIndexerForCollection(collection: string) {
     const indexers = Object.values(
       this.records as Record<string, RecordProcessor<unknown, unknown>>,

packages/bsky/src/data-plane/server/subscription.ts

@@ -0,0 +1,104 @@
+import { Firehose, MemoryRunner } from '@atproto/sync'
+import { IdResolver } from '@atproto/identity'
+import { WriteOpAction } from '@atproto/repo'
+import { subLogger as log } from '../../logger'
+import { IndexingService } from './indexing'
+import { Database } from './db'
+import { BackgroundQueue } from './background'
+
+export class RepoSubscription {
+  firehose: Firehose
+  runner: MemoryRunner
+  background: BackgroundQueue
+  indexingSvc: IndexingService
+
+  constructor(
+    public opts: { service: string; db: Database; idResolver: IdResolver },
+  ) {
+    const { service, db, idResolver } = opts
+    this.background = new BackgroundQueue(db)
+    this.indexingSvc = new IndexingService(db, idResolver, this.background)
+
+    const { runner, firehose } = createFirehose({
+      idResolver,
+      service,
+      indexingSvc: this.indexingSvc,
+    })
+    this.runner = runner
+    this.firehose = firehose
+  }
+
+  start() {
+    this.firehose.start()
+  }
+
+  async restart() {
+    await this.destroy()
+    const { runner, firehose } = createFirehose({
+      idResolver: this.opts.idResolver,
+      service: this.opts.service,
+      indexingSvc: this.indexingSvc,
+    })
+    this.runner = runner
+    this.firehose = firehose
+    this.start()
+  }
+
+  async processAll() {
+    await this.runner.processAll()
+    await this.background.processAll()
+  }
+
+  async destroy() {
+    await this.firehose.destroy()
+    await this.runner.destroy()
+    await this.background.processAll()
+  }
+}
+
+const createFirehose = (opts: {
+  idResolver: IdResolver
+  service: string
+  indexingSvc: IndexingService
+}) => {
+  const { idResolver, service, indexingSvc } = opts
+  const runner = new MemoryRunner({ startCursor: 0 })
+  const firehose = new Firehose({
+    idResolver,
+    runner,
+    service,
+    unauthenticatedHandles: true, // indexing service handles these
+    unauthenticatedCommits: true, // @TODO there seems to be a very rare issue where the authenticator thinks a block is missing in deletion ops
+    onError: (err) => log.error({ err }, 'error in subscription'),
+    handleEvent: async (evt) => {
+      if (evt.event === 'identity') {
+        await indexingSvc.indexHandle(evt.did, evt.time, true)
+      } else if (evt.event === 'account') {
+        if (evt.active === false && evt.status === 'deleted') {
+          await indexingSvc.deleteActor(evt.did)
+        } else {
+          await indexingSvc.updateActorStatus(evt.did, evt.active, evt.status)
+        }
+      } else {
+        const indexFn =
+          evt.event === 'delete'
+            ? indexingSvc.deleteRecord(evt.uri)
+            : indexingSvc.indexRecord(
+                evt.uri,
+                evt.cid,
+                evt.record,
+                evt.event === 'create'
+                  ? WriteOpAction.Create
+                  : WriteOpAction.Update,
+                evt.time,
+              )
+        await Promise.all([
+          indexFn,
+          indexingSvc.setCommitLastSeen(evt.did, evt.commit, evt.rev),
+          indexingSvc.indexHandle(evt.did, evt.time),
+        ])
+      }
+    },
+  })
+  return { firehose, runner }
+}