import { ServerkitError } from '@maroonedsoftware/errors';
/**
 * Thrown by a {@link JobBroker} when a requested operation is not supported by
 * the underlying backend.
 *
 * Backends vary in what they can do: some queue implementations can cancel a
 * queued job but not look up its state, others cannot cancel individual jobs at
 * all. Rather than silently doing nothing (which hides bugs), a backend throws
 * this error from any capability it cannot honor.
 *
 * Extends {@link ServerkitError}, so `errorMiddleware` renders it (as a 500) and
 * the `withDetails` / `withCause` / `withInternalDetails` setters apply.
 *
 * The bundled pg-boss backend supports every operation and never throws this;
 * it exists as the shared vocabulary for future backends (e.g. SQS, Pub/Sub).
 *
 * @example
 * ```typescript
 * async cancel(): Promise<void> {
 *   throw new NotSupportedError('cancel', 'sqs');
 * }
 * ```
 */
export declare class NotSupportedError extends ServerkitError {
    /** The name of the operation that is not supported (e.g. `'cancel'`). */
    readonly operation: string;
    /** The backend that does not support the operation, when known (e.g. `'sqs'`). */
    readonly backend?: string;
    /**
     * Creates a new NotSupportedError.
     *
     * @param operation - The name of the unsupported operation.
     * @param backend - The backend that does not support it, if known.
     */
    constructor(operation: string, backend?: string);
}
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