import { Histogram, Counter } from '@opentelemetry/api';
export declare const QueryType: {
    readonly SINGLE: "single";
    readonly MULTIPLE: "multiple";
};
/**
 * Metric instrument names for OpenTelemetry configuration.
 */
export declare const MetricNames: {
    readonly FRAGMENT_GENERATION_DURATION: "optimizely.fragment.generation.duration";
    readonly QUERY_GENERATION_DURATION: "optimizely.query.generation.duration";
    readonly HTTP_REQUEST_DURATION: "optimizely.http.request.duration";
    readonly CONTENT_FETCH_DURATION: "optimizely.content.fetch.duration";
    readonly COMPONENT_RESOLVE_DURATION: "optimizely.component.resolve.duration";
    readonly FRAGMENT_GENERATION_COUNT: "optimizely.fragment.generation.count";
    readonly QUERY_GENERATION_COUNT: "optimizely.query.generation.count";
    readonly HTTP_REQUEST_COUNT: "optimizely.http.requests";
    readonly CONTENT_FETCH_COUNT: "optimizely.content.fetches";
    readonly COMPONENT_LOOKUP_COUNT: "optimizely.component.lookups";
};
export declare const fragmentGenerationDuration: Histogram;
export declare const queryGenerationDuration: Histogram;
export declare const httpRequestDuration: Histogram;
export declare const contentFetchDuration: Histogram;
export declare const componentResolveDuration: Histogram;
export declare const fragmentGenerationCount: Counter;
export declare const queryGenerationCount: Counter;
export declare const httpRequestCount: Counter;
export declare const contentFetchCount: Counter;
export declare const componentLookupCount: Counter;
export declare const recordMetrics: (histogram: Histogram, counter: Counter, startTime: number, attributes: Record<string, any>) => void;