Analytics Event Tracking

OneKey uses a decorator-based logger system to track user behavior events. Events are routed to the analytics server (Mixpanel) via @LogToServer() decorator on scene methods. NEVER call analytics.trackEvent() directly.

Quick Reference

Topic	Guide	Key Files
Adding events	adding-events.md	packages/shared/src/logger/scopes/
Architecture	architecture.md	packages/shared/src/logger/base/
Common pitfalls	pitfalls.md	—

Critical Rules

1. MUST use @LogToServer() decorator — never call analytics.trackEvent() directly
2. Event method names use camelCase — the method name becomes the event name sent to Mixpanel
3. Methods MUST return params synchronously — never return a Promise
4. Deduplicate high-frequency events — prevent Mixpanel usage spikes (e.g., use in-memory Set for per-session dedup)
5. Add events to existing scopes when possible — only create new scopes for entirely new feature domains

Adding a Server Event (Quick Steps)

1. Create or update a Scene class

// packages/shared/src/logger/scopes/{scope}/scenes/{scene}.ts
import { BaseScene } from '../../../base/baseScene';
import { LogToServer } from '../../../base/decorators';

export class MyScene extends BaseScene {
  @LogToServer()
  public myEventName(params: { key: string; value: string }) {
    return params;
  }
}

2. Register scene in scope index

// packages/shared/src/logger/scopes/{scope}/index.ts
import { MyScene } from './scenes/myScene';

export class MyScope extends BaseScope {
  protected override scopeName = EScopeName.myScope;
  myScene = this.createScene('myScene', MyScene);
}

3. Call from business code

import { defaultLogger } from '@onekeyhq/shared/src/logger/logger';

defaultLogger.myScope.myScene.myEventName({ key: 'foo', value: 'bar' });

Decorator Types

Decorator	Destination	Use Case
@LogToServer()	Mixpanel analytics server	User behavior tracking, business metrics
@LogToLocal()	Device local log (React Native logger)	Debugging, device-side diagnostics
@LogToConsole()	Console only	Dev-time debugging

Stack decorators for dual logging: @LogToServer() + @LogToLocal().

Related Skills

• /1k-architecture — Import hierarchy rules (logger is in @onekeyhq/shared)
• /1k-coding-patterns — TypeScript and React conventions