/**
* Preference store — decides whether `(recipient, category)` is
* allowed to receive a message. Mirrors the Novu/Knock/Courier
* primitive, scoped to the narrow "preference center" use case.
*
* @module
*/
import type { MaybePromise } from "../types.mjs";
export interface PreferenceRecord {
	recipient: string;
	category: string;
	allowed: boolean;
	updatedAt: Date;
}
export interface PreferenceStore {
	/** Defaults to allowed=true when no record exists. */
	allows: (recipient: string, category: string) => MaybePromise<boolean>;
	set: (recipient: string, category: string, allowed: boolean) => MaybePromise<void>;
	list?: (recipient: string) => MaybePromise<ReadonlyArray<PreferenceRecord>>;
}
export interface MemoryPreferenceStoreOptions {
	now?: () => number;
	/** Default value when no record exists. Defaults to true (allow). */
	defaultAllowed?: boolean;
}
export declare function memoryPreferenceStore(opts?: MemoryPreferenceStoreOptions): PreferenceStore;