Patch GrowthBook and set feature callback

patches/@growthbook+growthbook+1.6.2.patch

@@ -0,0 +1,55 @@
+diff --git a/node_modules/@growthbook/growthbook/dist/GrowthBook.d.ts b/node_modules/@growthbook/growthbook/dist/GrowthBook.d.ts
+index ec532b0..d96a5f1 100644
+--- a/node_modules/@growthbook/growthbook/dist/GrowthBook.d.ts
++++ b/node_modules/@growthbook/growthbook/dist/GrowthBook.d.ts
+@@ -1,4 +1,4 @@
+-import type { ApiHost, Attributes, AutoExperiment, AutoExperimentVariation, ClientKey, Options, Experiment, FeatureApiResponse, FeatureDefinition, FeatureResult, LoadFeaturesOptions, RefreshFeaturesOptions, RenderFunction, Result, SubscriptionFunction, TrackingCallback, TrackingData, WidenPrimitives, InitOptions, InitResponse, InitSyncOptions, PrefetchOptions, StickyAssignmentsDocument, EventLogger, LogUnion, DestroyOptions } from "./types/growthbook";
++import type { ApiHost, Attributes, AutoExperiment, AutoExperimentVariation, ClientKey, Options, Experiment, FeatureApiResponse, FeatureDefinition, FeatureResult, FeatureUsageCallback, LoadFeaturesOptions, RefreshFeaturesOptions, RenderFunction, Result, SubscriptionFunction, TrackingCallback, TrackingData, WidenPrimitives, InitOptions, InitResponse, InitSyncOptions, PrefetchOptions, StickyAssignmentsDocument, EventLogger, LogUnion, DestroyOptions } from "./types/growthbook";
+ import { StickyBucketServiceSync } from "./sticky-bucket-service";
+ export declare class GrowthBook<AppFeatures extends Record<string, any> = Record<string, any>> {
+     private context;
+@@ -106,6 +106,7 @@ export declare class GrowthBook<AppFeatures extends Record<string, any> = Record
+     setDeferredTrackingCalls(calls: TrackingData[]): void;
+     fireDeferredTrackingCalls(): Promise<void>;
+     setTrackingCallback(callback: TrackingCallback): void;
++    setFeatureUsageCallback(callback: FeatureUsageCallback): void;
+     setEventLogger(logger: EventLogger): void;
+     logEvent(eventName: string, properties?: Record<string, unknown>): Promise<void>;
+     private _saveDeferredTrack;
+diff --git a/node_modules/@growthbook/growthbook/dist/esm/GrowthBook.mjs b/node_modules/@growthbook/growthbook/dist/esm/GrowthBook.mjs
+index e0847f0..4bcc20f 100644
+--- a/node_modules/@growthbook/growthbook/dist/esm/GrowthBook.mjs
++++ b/node_modules/@growthbook/growthbook/dist/esm/GrowthBook.mjs
+@@ -682,6 +682,9 @@ export class GrowthBook {
+     this._options.trackingCallback = callback;
+     this.fireDeferredTrackingCalls();
+   }
++  setFeatureUsageCallback(callback) {
++    this._options.onFeatureUsage = callback;
++  }
+   setEventLogger(logger) {
+     this._options.eventLogger = logger;
+   }
+diff --git a/node_modules/@growthbook/growthbook/src/GrowthBook.ts b/node_modules/@growthbook/growthbook/src/GrowthBook.ts
+index 907fc97..e59201c 100644
+--- a/node_modules/@growthbook/growthbook/src/GrowthBook.ts
++++ b/node_modules/@growthbook/growthbook/src/GrowthBook.ts
+@@ -16,6 +16,7 @@ import type {
+   Result,
+   SubscriptionFunction,
+   TrackingCallback,
++  FeatureUsageCallback,
+   TrackingData,
+   WidenPrimitives,
+   EvalContext,
+@@ -952,6 +953,10 @@ export class GrowthBook<
+     this.fireDeferredTrackingCalls();
+   }
+ 
++  public setFeatureUsageCallback(callback: FeatureUsageCallback) {
++    this._options.onFeatureUsage = callback;
++  }
++
+   public setEventLogger(logger: EventLogger) {
+     this._options.eventLogger = logger;
+   }

src/analytics/index.tsx

@@ -1,4 +1,4 @@
-import {createContext, useContext, useEffect, useMemo} from 'react'
+import {createContext, useContext, useMemo} from 'react'
 import {Platform} from 'react-native'
 
 import {Logger} from '#/logger'
@@ -181,20 +181,25 @@ export function AnalyticsFeaturesContext({
   const parentContext = useContext(Context)
 
   /**
-   * Side-effect: we need to synchronously set this during the
+   * Side-effects: we need to synchronously set these during the same render
-   * same render cycle. It does not trigger a re-render, it just
+   * cycle. These calls do not trigger re-renders, they just set properties on
-   * sets properties on the singleton GrowthBook instance.
+   * the singleton GrowthBook instance.
    */
   setAttributes(parentContext.metadata)
-
+  feats.setTrackingCallback((experiment, result) => {
-  useEffect(() => {
+    parentContext.metric('experiment:viewed', {
-    feats.setTrackingCallback((experiment, result) => {
+      experimentId: experiment.key,
-      parentContext.metric('experiment:viewed', {
+      variationId: result.key,
-        experimentId: experiment.key,
-        variationId: result.key,
-      })
     })
-  }, [parentContext.metric])
+  })
+  feats.setFeatureUsageCallback((feature, result) => {
+    parentContext.metric('feature:viewed', {
+      featureId: feature,
+      featureResultValue: result.value,
+      experimentId: result.experiment?.key,
+      variationId: result.experimentResult?.key,
+    })
+  })
 
   const childContext = useMemo<AnalyticsContextType>(() => {
     return {

src/analytics/metrics/types.ts

@@ -15,6 +15,14 @@ export type Events = {
     experimentId: string
     variationId: string
   }
+  'feature:viewed': {
+    featureId: string
+    featureResultValue: unknown
+    /** Only available if feature has experiment rules applied */
+    experimentId?: string
+    /** Only available if feature has experiment rules applied */
+    variationId?: string
+  }
 
   'account:loggedIn': {
     logContext: