/**
 * Pure transform: Gemini API response → normalized UsageInfo.
 *
 * Kept separate so it can be unit-tested without network access or mocking
 * any provider internals.
 */
import type { UsageInfo } from "../../pricing/types.js";
interface GeminiUsageMetadata {
    promptTokenCount?: number;
    candidatesTokenCount?: number;
    totalTokenCount?: number;
    cachedContentTokenCount?: number;
}
interface GeminiResponseLike {
    candidates?: Array<{
        finishReason?: string;
    }>;
    usageMetadata?: GeminiUsageMetadata;
    modelVersion?: string;
}
export interface GeminiUsageInputs {
    /** The raw JSON response from the Gemini API. */
    raw: GeminiResponseLike;
    /** Model string to use when `raw.modelVersion` is absent. */
    model_fallback: string;
    /** Wall-clock milliseconds from request start to response received. */
    latency_ms: number;
}
/**
 * Convert a raw Gemini API response into a normalized UsageInfo object.
 *
 * Does NOT call `compute_cost()` — callers are responsible for enriching with
 * pricing data after this function returns.
 */
export declare function gemini_response_to_usage(inputs: GeminiUsageInputs): UsageInfo;
export {};
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