import type { ActivityPrincipal, ActivitySource } from './types.js';
export interface ActivityContext {
    actor?: ActivityPrincipal;
    initiator?: ActivityPrincipal;
    source?: ActivitySource;
}
export declare function runWithActivityContext<T>(context: ActivityContext, fn: () => T): T;
export declare function getActivityContext(): ActivityContext | undefined;
export declare function currentActivityActor(fallback?: ActivityPrincipal): ActivityPrincipal;
export declare function currentActivityInitiator(): ActivityPrincipal | undefined;
export declare function currentActivitySource(fallback?: ActivitySource): ActivitySource;