import * as grpc from '@grpc/grpc-js';
import * as protobufjs from 'protobufjs';
import type * as descriptor from 'protobufjs/ext/descriptor';
import { ApiActionConfig, ApiServiceGrpcActionConfig, BaseSchema, EndpointsConfig, GatewayApiOptions } from '../models/common';
import { GatewayContext } from '../models/context';
import { AppErrorConstructor } from '../models/error';
declare module 'protobufjs' {
    interface Root {
        toDescriptor(protoVersion: string): protobufjs.Message<descriptor.IFileDescriptorSet> & descriptor.IFileDescriptorSet;
    }
}
interface CredentialsMap {
    insecure: grpc.ChannelCredentials;
    secure: grpc.ChannelCredentials;
    secureWithoutRootCert: grpc.ChannelCredentials;
}
export interface GrpcContext {
    root: protobufjs.Root;
    credentials: CredentialsMap;
}
export declare function createRoot(includeGrpcPaths?: string[]): protobufjs.Root;
export declare function getCredentialsMap(caCertificatePath?: string | null, clientCertificatePath?: string | null, clientKeyPath?: string | null): CredentialsMap;
export default function createGrpcAction<Context extends GatewayContext>({ root, credentials }: GrpcContext, endpoints: EndpointsConfig | undefined, config: ApiServiceGrpcActionConfig<Context, any, any>, serviceKey: string, actionName: string, options: GatewayApiOptions<Context>, ErrorConstructor: AppErrorConstructor, serviceSchema?: Pick<BaseSchema[string], 'getAuthHeaders'>): (actionConfig: ApiActionConfig<Context, any, any>) => Promise<import("../models/common").GatewayActionClientStreamResponse<any> | import("../models/common").GatewayActionServerStreamResponse<any> | import("../models/common").GatewayActionDuplexStreamResponse<any> | import("../models/common").GatewayActionUnaryResponse<any>>;
export {};