/**
 * LLM token usage tracker.
 * Extracts token counts from common provider responses and ingests a usage event.
 */
/**
 * Normalized token usage across providers.
 */
export interface TokenUsage {
    inputTokens: number;
    outputTokens: number;
    totalTokens: number;
    model: string;
}
/**
 * Configuration for `LLMTracker`.
 */
export interface TrackingConfig {
    /** Dodo Payments API key for event ingestion */
    apiKey: string;
    /** Environment mode - use 'test_mode' for development, 'live_mode' for production */
    environment?: 'test_mode' | 'live_mode';
    /** Event name for meter tracking - must match your Dodo Payments meter configuration */
    eventName: string;
}
/**
 * Tracks LLM usage by extracting tokens and emitting a Dodo usage event.
 */
export declare class LLMTracker {
    private client;
    private eventName;
    /**
     * Create a tracker that sends usage events via `DodoClient`.
     */
    constructor(config: TrackingConfig);
    /**
     * Track token usage for any LLM response.
     */
    track(response: any, customerId: string, metadata?: Record<string, any>): Promise<void>;
    /**
     * Extract token usage from common LLM response formats.
     */
    private extractUsage;
    /**
     * Generate a unique event ID.
     */
    private generateEventId;
    /**
     * Test API connectivity.
     */
    healthCheck(): Promise<boolean>;
}
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