import type { ParamsFactory } from '@nestjs/core/helpers/external-context-creator.js';
/**
 * Factory class that provides parameters for NestJS RPC controllers.
 */
export declare class RpcParamsFactory implements ParamsFactory {
    /**
     * Exchanges a metadata key for a value from the arguments.
     *
     * @param type - The metadata type.
     * @param data - The metadata data.
     * @param args - The arguments array.
     * @returns The first argument if available, otherwise null.
     */
    exchangeKeyForValue(type: number, data: any, args: any): any;
}