import type { Propagation } from '@nestjs-transactions/core';
import type { TypeOrmTransactionOptions } from '@nestjs-cls/transactional-adapter-typeorm';
/**
 * Options for {@link Transactional}. A single object — matching the ergonomics
 * of `typeorm-transactional` — carrying the connection, the propagation mode,
 * and the TypeORM transaction options (e.g. `isolationLevel`).
 */
export interface TransactionalOptions extends Partial<TypeOrmTransactionOptions> {
    /** The named connection to run on. Omit for the default connection. */
    connectionName?: string;
    /** The propagation mode. Defaults to `Propagation.REQUIRED`. */
    propagation?: Propagation;
}
/**
 * Run the decorated method in a transaction.
 *
 * Takes a single options object (unlike `@nestjs-cls`'s positional API), so
 * `connectionName` and `propagation` can never be confused and options read
 * clearly at the call site. Delegates to `@nestjs-cls/transactional` — the
 * transaction engine, propagation semantics, and NestJS method metadata are
 * all unchanged; no monkey-patching.
 *
 * @example
 * ```ts
 * @Transactional()
 * @Transactional({ propagation: Propagation.REQUIRES_NEW })
 * @Transactional({ isolationLevel: IsolationLevel.SERIALIZABLE })
 * @Transactional({ connectionName: 'stats', propagation: Propagation.NESTED })
 * ```
 */
export declare function Transactional(options?: TransactionalOptions): MethodDecorator;
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