import type { LiteLLMUsageMetadata, LiteLLMChatCompletionRequest, LiteLLMChatCompletionResponse } from "./types.js";
export declare function sendReveniumMetrics(data: {
    requestId: string;
    model: string;
    promptTokens: number;
    completionTokens: number;
    totalTokens: number;
    reasoningTokens?: number;
    cachedTokens?: number;
    duration: number;
    finishReason: string | null;
    usageMetadata?: LiteLLMUsageMetadata;
    isStreamed?: boolean;
    timeToFirstToken?: number;
    operationType?: "CHAT" | "EMBED";
    responseFormat?: any;
    request?: LiteLLMChatCompletionRequest;
    response?: LiteLLMChatCompletionResponse;
}): Promise<void>;
export declare function trackUsageAsync(trackingData: Parameters<typeof sendReveniumMetrics>[0]): void;
export declare function trackEmbeddingsUsageAsync(data: {
    requestId: string;
    model: string;
    promptTokens: number;
    totalTokens: number;
    duration: number;
    usageMetadata?: LiteLLMUsageMetadata;
}): void;
export declare function extractMetadataFromHeaders(headers: Record<string, string>): LiteLLMUsageMetadata;
export declare function extractUsageFromResponse(response: LiteLLMChatCompletionResponse): {
    promptTokens: number;
    completionTokens: number;
    totalTokens: number;
    cachedTokens?: number;
    finishReason: string | null;
};
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