import { Struct } from './generated/google/protobuf/Struct';
import { experimental } from '@grpc/grpc-js';
import FileWatcherCertificateProviderConfig = experimental.FileWatcherCertificateProviderConfig;
export interface Locality {
    region?: string;
    zone?: string;
    sub_zone?: string;
}
export interface Node {
    id: string;
    locality: Locality;
    cluster?: string;
    metadata?: Struct;
}
export interface ChannelCredsConfig {
    type: string;
    config?: object;
}
export interface XdsServerConfig {
    server_uri: string;
    channel_creds: ChannelCredsConfig[];
    server_features: string[];
}
export interface Authority {
    clientListenerResourceNameTemplate: string;
    xdsServers?: XdsServerConfig[];
}
export type PluginConfig = FileWatcherCertificateProviderConfig;
export interface CertificateProviderConfig {
    pluginName: string;
    config: PluginConfig;
}
export interface BootstrapInfo {
    xdsServers: XdsServerConfig[];
    node: Node;
    authorities: {
        [authorityName: string]: Authority;
    };
    clientDefaultListenerResourceNameTemplate: string;
    serverListenerResourceNameTemplate: string | null;
    certificateProviders: {
        [instanceName: string]: CertificateProviderConfig;
    };
}
export declare function serverConfigEqual(config1: XdsServerConfig, config2: XdsServerConfig): boolean;
export declare function validateXdsServerConfig(obj: any): XdsServerConfig;
export declare function validateBootstrapConfig(obj: any): BootstrapInfo;
/**
 * Load the bootstrap information from the location determined by the
 * GRPC_XDS_BOOTSTRAP environment variable, or if that is unset, from the
 * GRPC_XDS_BOOTSTRAP_CONFIG environment variable. The value is cached, so any
 * calls after the first will just return the cached value.
 * @returns
 */
export declare function loadBootstrapInfo(): BootstrapInfo;
/**
 * Encode a text string as a valid path of a URI, as specified in RFC-3986 section 3.3
 * @param uriPath A value representing an unencoded URI path
 * @returns
 */
export declare function encodeURIPath(uriPath: string): string;
export declare function formatTemplateString(templateString: string, value: string): string;