export declare const kMetadataBaseUrl = "http://metadata.tencentyun.com";
export declare const kAppIdPath = "meta-data/app-id";
export declare const kSecurityCredentialsPath = "meta-data/cam/security-credentials";
export declare enum kMetadataVersions {
    'v20170919' = "2017-09-19",
    'v1.0' = "1.0",
    'latest' = "latest"
}
export declare function isAppId(appIdStr: string): boolean;
export declare function lookup(path: string, options?: {
    timeout?: number;
}): Promise<string>;
export declare function lookupAppId(): Promise<string>;
export declare function lookupCredentials(ruleName: string): Promise<string>;