export interface Beacon<T> {
    readonly key?: string;
    emit(value: T): void;
    on(listener: (value: T) => void): () => void;
    once(listener: (value: T) => void): () => void;
    off(listener: (value: T) => void): void;
    clear(): void;
}
export interface Pulse {
    readonly key?: string;
    emit(): void;
    on(listener: () => void): () => void;
    once(listener: () => void): () => void;
    off(listener: () => void): void;
    clear(): void;
}
export declare function createBeacon<T>(): Beacon<T>;
export declare function createBeacon<T>(key: string): Beacon<T>;
export declare function useBeacon<T>(key: string): Beacon<T>;
export declare function hasBeacon(key: string): boolean;
export declare function getBeacon<T>(key: string): Beacon<T> | undefined;
export declare function clearBeacons(): void;
export declare function createPulse(): Pulse;
export declare function createPulse(key: string): Pulse;
export declare function usePulse(key: string): Pulse;
export declare function hasPulse(key: string): boolean;
export declare function getPulse(key: string): Pulse | undefined;
export declare function clearPulses(): void;
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