export type StatelessNacosConfig = {
    endpoint: string;
    auth?: {
        username?: string;
        password?: string;
        token?: string;
    };
    apiVersion?: 2 | 3 | 'auto';
    contextPath?: string;
};
export type NacosRequest = (options: {
    method: 'GET' | 'POST' | 'DELETE';
    url: string;
    params?: Record<string, string | number>;
    data?: string | Record<string, string>;
    headers?: Record<string, string>;
}) => Promise<{
    data: any;
}>;
export type NacosConfigResult = {
    exists: boolean;
    content: string;
};
export type NacosConfigList = {
    items: Array<Record<string, unknown>>;
    totalCount: number;
};
export declare class NacosClient {
    private readonly config;
    private readonly dependencies;
    private readonly baseUrl;
    private contextPath;
    private accessToken?;
    private resolvedApiVersion?;
    constructor(config: StatelessNacosConfig, dependencies?: {
        request?: NacosRequest;
    });
    /** Probe the endpoint without assuming an API version or context path. */
    discover(): Promise<{
        apiVersion: 2 | 3 | 'unknown';
        contextPath: string;
        authenticated: boolean;
    }>;
    listNamespaces(): Promise<Array<Record<string, unknown>>>;
    listGroups(namespace?: string): Promise<Array<Record<string, unknown>>>;
    listConfigs(options?: {
        pageNo?: number;
        pageSize?: number;
        dataId?: string;
        group?: string;
        namespace?: string;
    }): Promise<NacosConfigList>;
    getConfig(dataId: string, group?: string, namespace?: string): Promise<NacosConfigResult>;
    publishConfig(dataId: string, content: string, type: string, group?: string, namespace?: string): Promise<boolean>;
    deleteConfig(dataId: string, group?: string, namespace?: string): Promise<boolean>;
    private get isV3();
    private configEndpoint;
    private ensureApiVersion;
    private scope;
    private unwrapResult;
    private request;
    private login;
    private hasCredentials;
    private username;
    private password;
    private safeError;
    private configEndpointFor;
    private configuredCandidates;
    private rawRequest;
}