import * as grpc from '@grpc/grpc-js';
import { Observable } from 'rxjs';
import { Metadata } from './metadata';
/** Reactive signature for client methods with unary request and response types. */
export declare type ReactiveNodeClientUnaryMethod<RequestType, ResponseType> = (request: RequestType, metadata?: Metadata | grpc.Metadata, options?: Partial<grpc.CallOptions>) => Promise<ResponseType> & {
    call: grpc.ClientUnaryCall;
};
/** Reactive signature for client methods with streaming request and unary response types. */
export declare type ReactiveNodeClientRequestStreamMethod<RequestType, ResponseType> = (request: Observable<RequestType>, metadata?: Metadata | grpc.Metadata, options?: Partial<grpc.CallOptions>) => Promise<ResponseType> & {
    call: grpc.ClientWritableStream<RequestType>;
};
/** Reactive signature for client methods with unary request and streaming response types. */
export declare type ReactiveNodeClientResponseStreamMethod<RequestType, ResponseType> = (request: RequestType, metadata?: Metadata | grpc.Metadata, options?: Partial<grpc.CallOptions>) => Observable<ResponseType> & {
    call: grpc.ClientReadableStream<ResponseType>;
};
/** Reactive signature for client methods with streaming request and response types. */
export declare type ReactiveNodeClientBidirectionalStreamMethod<RequestType, ResponseType> = (request: Observable<RequestType>, metadata?: Metadata | grpc.Metadata, options?: Partial<grpc.CallOptions>) => Observable<ResponseType> & {
    call: grpc.ClientDuplexStream<RequestType, ResponseType>;
};
/** Reactive signature for all client methods. */
export declare type ReactiveNodeClientMethod<RequestType, ResponseType> = ReactiveNodeClientUnaryMethod<RequestType, ResponseType> | ReactiveNodeClientRequestStreamMethod<RequestType, ResponseType> | ReactiveNodeClientResponseStreamMethod<RequestType, ResponseType> | ReactiveNodeClientBidirectionalStreamMethod<RequestType, ResponseType>;