Core API

The FlipFlagClient is the shared client used by all SDKs.

• start(): Promise<void> — Starts polling and metrics timers.
• stop(): void — Stops timers.
• isEnabled(flagKey: string, defaultValue?: boolean): boolean
• getVariant(flagKey: string, defaultValue?: FlagValue): SdkFlagEvaluation
• getAllFlags(): Record<string, SdkFlagEvaluation>
• updateContext(context: SdkContext): void
• flushMetrics(): Promise<void>
• getStatus(): { ready: boolean; error?: Error; updatedAt?: string }

Events:

• ready — initial evaluations fetched.
• update — evaluations refreshed.
• error — request failed.
• metrics — metrics flushed.