import { Duration as DurationPB } from "@bufbuild/protobuf";
/**
 * A time value with nanosecond precision, generated by `now()`.
 *
 * The first element is the number of seconds since some epoch.
 * The second element is the number of nanoseconds.
 */
export type HRTime = [number, number];
/**
 * Returns nanosecond precision time since some epoch based
 * upon a high resolution timer.
 */
export declare function now(): HRTime;
/**
 * A duration of time, generated by `since()`.
 *
 * The first element is the number of seconds.
 * The second element is the number of nanoseconds.
 */
export type Duration = [number, number];
export declare function since(start: HRTime): Duration;
/**
 * This function is used to convert
 */
export declare function toDurationStr([seconds, nanoseconds]: Duration): string;
/**
 * Parses a duration string into a duration.
 */
export declare function parseDuration(str: string): Duration;
export declare function durationToProto([seconds, nanoseconds]: Duration): DurationPB;