[Statsig] Remove client downsampling (#6153)

src/lib/statsig/events.ts

@@ -21,11 +21,11 @@ export type LogEvents = {
     context: 'StartOnboarding' | 'AfterOnboarding' | 'Login' | 'Home'
     status: 'granted' | 'denied' | 'undetermined'
   }
-  'state:background:sampled': {
+  'state:background': {
     secondsActive: number
   }
-  'state:foreground:sampled': {}
-  'router:navigate:notifications:sampled': {}
+  'state:foreground': {}
+  'router:navigate:notifications': {}
   'deepLink:referrerReceived': {
     to: string
     referrer: string
@@ -76,7 +76,7 @@ export type LogEvents = {
   'onboarding:finished:avatarResult': {
     avatarResult: 'default' | 'created' | 'uploaded'
   }
-  'home:feedDisplayed:sampled': {
+  'home:feedDisplayed': {
     feedUrl: string
     feedType: string
     index: number
@@ -87,12 +87,12 @@ export type LogEvents = {
       | 'desktop-sidebar-click'
       | 'starter-pack-initial-feed'
   }
-  'feed:endReached:sampled': {
+  'feed:endReached': {
     feedUrl: string
     feedType: string
     itemCount: number
   }
-  'feed:refresh:sampled': {
+  'feed:refresh': {
     feedUrl: string
     feedType: string
     reason: 'pull-to-refresh' | 'soft-reset' | 'load-latest'
@@ -103,13 +103,13 @@ export type LogEvents = {
   'discover:showLess': {
     feedContext: string
   }
-  'discover:clickthrough:sampled': {
+  'discover:clickthrough': {
     count: number
   }
-  'discover:engaged:sampled': {
+  'discover:engaged': {
     count: number
   }
-  'discover:seen:sampled': {
+  'discover:seen': {
     count: number
   }
 
@@ -132,27 +132,27 @@ export type LogEvents = {
     postCount: number
     isReply: boolean
   }
-  'post:like:sampled': {
+  'post:like': {
     doesLikerFollowPoster: boolean | undefined
     doesPosterFollowLiker: boolean | undefined
     likerClout: number | undefined
     postClout: number | undefined
     logContext: 'FeedItem' | 'PostThreadItem' | 'Post'
   }
-  'post:repost:sampled': {
+  'post:repost': {
     logContext: 'FeedItem' | 'PostThreadItem' | 'Post'
   }
-  'post:unlike:sampled': {
+  'post:unlike': {
     logContext: 'FeedItem' | 'PostThreadItem' | 'Post'
   }
-  'post:unrepost:sampled': {
+  'post:unrepost': {
     logContext: 'FeedItem' | 'PostThreadItem' | 'Post'
   }
   'post:mute': {}
   'post:unmute': {}
   'post:pin': {}
   'post:unpin': {}
-  'profile:follow:sampled': {
+  'profile:follow': {
     didBecomeMutual: boolean | undefined
     followeeClout: number | undefined
     followerClout: number | undefined
@@ -169,7 +169,7 @@ export type LogEvents = {
       | 'FeedInterstitial'
       | 'ProfileHeaderSuggestedFollows'
   }
-  'profile:unfollow:sampled': {
+  'profile:unfollow': {
     logContext:
       | 'RecommendedFollowsItem'
       | 'PostThreadItem'

src/lib/statsig/statsig.tsx

@@ -59,6 +59,7 @@ function createStatsigOptions(prefetchUsers: StatsigUser[]) {
     initTimeoutMs: 1,
     // Get fresh flags for other accounts as well, if any.
     prefetchUsers,
+    api: 'https://events.bsky.app/v2',
   }
 }
 
@@ -89,51 +90,14 @@ export function toClout(n: number | null | undefined): number | undefined {
   }
 }
 
-const DOWNSAMPLE_RATE = 0.99 // 99% likely
-const DOWNSAMPLED_EVENTS: Set<keyof LogEvents> = new Set([
-  'router:navigate:notifications:sampled',
-  'state:background:sampled',
-  'state:foreground:sampled',
-  'home:feedDisplayed:sampled',
-  'feed:endReached:sampled',
-  'feed:refresh:sampled',
-  'discover:clickthrough:sampled',
-  'discover:engaged:sampled',
-  'discover:seen:sampled',
-  'post:like:sampled',
-  'post:unlike:sampled',
-  'post:repost:sampled',
-  'post:unrepost:sampled',
-  'profile:follow:sampled',
-  'profile:unfollow:sampled',
-])
-const isDownsampledSession = Math.random() < DOWNSAMPLE_RATE
-
 export function logEvent<E extends keyof LogEvents>(
   eventName: E & string,
   rawMetadata: LogEvents[E] & FlatJSONRecord,
 ) {
   try {
-    if (
-      process.env.NODE_ENV === 'development' &&
-      eventName.endsWith(':sampled') &&
-      !DOWNSAMPLED_EVENTS.has(eventName)
-    ) {
-      logger.error(
-        'Did you forget to add ' + eventName + ' to DOWNSAMPLED_EVENTS?',
-      )
-    }
-
-    const isDownsampledEvent = DOWNSAMPLED_EVENTS.has(eventName)
-    if (isDownsampledSession && isDownsampledEvent) {
-      return
-    }
     const fullMetadata = {
       ...rawMetadata,
     } as Record<string, string> // Statsig typings are unnecessarily strict here.
-    if (isDownsampledEvent) {
-      fullMetadata.downsampleRate = DOWNSAMPLE_RATE.toString()
-    }
     fullMetadata.routeName = getCurrentRouteName() ?? '(Uninitialized)'
     if (Statsig.initializeCalled()) {
       Statsig.logEvent(eventName, null, fullMetadata)
@@ -232,13 +196,13 @@ AppState.addEventListener('change', (state: AppStateStatus) => {
   lastState = state
   if (state === 'active') {
     lastActive = performance.now()
-    logEvent('state:foreground:sampled', {})
+    logEvent('state:foreground', {})
   } else {
     let secondsActive = 0
     if (lastActive != null) {
       secondsActive = Math.round((performance.now() - lastActive) / 1e3)
       lastActive = null
-      logEvent('state:background:sampled', {
+      logEvent('state:background', {
         secondsActive,
       })
     }