import { ErrorUnion, OkUnion } from '../outputs';
/**
 * Adds a user to the blacklist
 * @param {Object} params
 * @param {number} [params.userId] - User identifier
 * @param {Object} state
 * @returns {OkUnion | ErrorUnion}
 */
export declare type BlockUserMethod = <ResponseT = OkUnion>(params: BlockUserParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface BlockUserParams {
    /** User identifier */
    userId?: number;
}