import type { Authenticatable } from './Authenticatable.js';
/**
 * Guard capability for HTTP Basic authentication.
 */
export interface SupportsBasicAuth {
    /**
     * Parses `Authorization: Basic`, attempts login, challenges with 401 on failure.
     *
     * @param field - Credential field used for lookup (default `email`).
     * @param extraConditions - Extra fields merged into credential bag.
     */
    basic(field?: string, extraConditions?: Record<string, unknown>): Promise<void>;
    /**
     * Stateless basic auth: validates credentials without persisting session state.
     *
     * @param field - Credential field used for lookup.
     * @param extraConditions - Extra fields merged into credential bag.
     */
    onceBasic(field?: string, extraConditions?: Record<string, unknown>): Promise<void>;
    /**
     * @returns Authenticated user after successful basic auth.
     */
    user(): Promise<Authenticatable | null>;
}
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