/**
 * Start timer command payload definition.
 */
export type TimingStartTimerPayload = {
    /**
     * The title for the timer.
     */
    title?: string;
    /**
     * The notes for the timer.
     */
    notes?: string;
    /**
     * The ID or name of the project for the timer.
     */
    project?: string;
    /**
     * The estimated duration for the timer, in seconds.
     */
    estimatedDuration?: number;
    /**
     * The start date for the timer.
     */
    startDate?: string;
    /**
     * Start the timer without presenting a dialogue first.
     */
    startImmediately?: boolean;
    /**
     * Center the timer editor on the screen. Timing documents this as only
     * available when `startImmediately` is not true.
     */
    center?: boolean;
};
/**
 * Start a timer in the Timing tracker app.
 *
 * @param payload Timing start timer payload.
 * @returns Timing start timer URL.
 * @example
 * startTimer({
 *   title: 'Some title',
 *   notes: 'Some\nnotes',
 *   project: 'Work',
 *   estimatedDuration: 600,
 *   startDate: '2022-04-01T12:00:00Z',
 *   startImmediately: false,
 *   center: true,
 * })
 * // => 'timing2helper://startTimer?title=Some%20title&notes=Some%0Anotes&project=Work&estimatedDuration=600&startDate=2022-04-01T12:00:00Z&startImmediately=false&center=true'
 * @link https://timingapp.com/help/url-schemes
 */
export declare function startTimer(payload?: TimingStartTimerPayload): string;