import type CDP from 'chrome-remote-interface';
export declare enum HookOrderToMetricOrder {
    'onStart' = "startMetrics",
    'onStop' = "stopMetrics"
}
export declare enum HookOrderToMeasurementOrder {
    'onStart' = "startMeasurement",
    'onStop' = "endMeasurement"
}
export declare enum HookOrderToMeasurementOffsetOrder {
    'onStart' = "startMeasurementOffset",
    'onStop' = "endMeasurementOffset"
}
/**
 * Common metric type
 */
export type Metric = Record<string, string | number>;
/**
 * Metric type specific for targets
 */
export type TargetMetric = {
    metric: Metric;
} & Partial<CDP.Target>;
/**
 * Common interface to expose performance metrics during a timeframe
 */
export type PerformanceMetrics = {
    /**
     * Unix timestamp of start of capture
     */
    startMeasurement: number;
    /**
     * Amount of milliseconds between metric trigger and when it was measured
     */
    startMeasurementOffset?: number;
    /**
     * Unix timestamp of end of capture
     */
    endMeasurement: number;
    /**
     * Amount of milliseconds between metric trigger and when it was measured
     */
    endMeasurementOffset?: number;
    /**
     * Metrics gathered from the extractors
     */
    startMetrics: TargetMetric[];
    /**
     * Metrics gathered from the extractors
     */
    stopMetrics: TargetMetric[];
    /**
     * Metrics gathered from the extractors in sampling mode
     */
    samplingMetrics: TargetMetric[];
};
/**
 * Plugin to execute before the metrics are fetched. Can be used to make the metrics fetch possible.
 */
export type MeasurePlugin = <T extends CDP.Client>(developmentTools: T) => Promise<any>;
/**
 * Start metric measurement and write the preliminary result into the storage
 */
export type OnStartMeasure = <T extends CDP.Client>(accumulator: Metric, developmentTools: T) => Promise<void>;
/**
 * Sampling metric measurement and write the result into the storage
 */
export type OnSamplingMeasure = <T extends CDP.Client>(accumulator: Metric, developmentTools: T) => Promise<void>;
/**
 * Stop metric measurement and write the result into the storage
 */
export type OnStopMeasure = <T extends CDP.Client>(accumulator: Metric, developmentTools: T) => Promise<void>;
export { type default as CDP } from 'chrome-remote-interface';