/**
 * Minimal key-value storage adapter.
 * Pass `localStorage` in browser environments, or any Map-backed adapter for Node.js / tests.
 */
export interface IPluginStorage {
    getItem(key: string): string | null;
    setItem(key: string, value: string): void;
}
/**
 * Minimal event emitter interface for the plugin events API.
 * Compatible with Node.js EventEmitter, matrix-js-sdk MatrixClient, and similar clients.
 */
export interface IPluginEventClient {
    on(event: string, handler: (...args: any[]) => void): void;
    off(event: string, handler: (...args: any[]) => void): void;
}
/**
 * In-memory storage implementation — used as the default when no storage adapter is provided.
 */
export declare class MemoryStorage implements IPluginStorage {
    private readonly store;
    /** @inheritdoc */
    getItem(key: string): string | null;
    /** @inheritdoc */
    setItem(key: string, value: string): void;
}
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