import * as grpc from "grpc";
export declare enum InterceptorType {
    Unary = 0,
    ClientStreaming = 1,
    ServerStreaming = 2,
    BidiStreaming = 3
}
declare type InterceptorFn = (options: grpc.CallOptions, next: Function) => grpc.InterceptingCall;
export interface InterceptorChainConfig {
    type: InterceptorType;
    interceptorFn: InterceptorFn;
}
export declare type Interceptor = (methodDefinition: grpc.MethodDefinition<any, any>) => InterceptorFn;
/**
 * Interceptor chain, helps to chain together multiple interceptors
 * @param interceptors
 */
export declare function interceptorChain(interceptors: InterceptorChainConfig[]): Interceptor[];
export {};