/**
 * Custom error class for network-layer failures during fetch requests.
 *
 * Wraps low-level network errors (connection resets, timeouts, DNS failures, TLS errors, etc.)
 * with actionable context about what operation failed, which host was targeted, and what remediation
 * steps may help.
 *
 * @example
 * try {
 *   await client.deploy();
 * } catch (error) {
 *   if (error instanceof NetworkError && error.kind === 'timeout') {
 *     console.error('Request timed out, retrying...');
 *   }
 *   throw error;
 * }
 *
 * @module errors/network-error
 */
/**
 * Classification of network error causes.
 */
export type NetworkErrorKind = 'timeout' | 'connection-reset' | 'connection-refused' | 'dns' | 'tls' | 'aborted' | 'unknown';
/**
 * Error thrown when a network-layer request fails.
 *
 * Provides structured classification of network failures and actionable hints for resolution.
 */
export declare class NetworkError extends Error {
    /**
     * Classified network error kind.
     */
    readonly kind: NetworkErrorKind;
    /**
     * Description of the operation that failed (e.g., "WebDAV POST", "OAuth token request").
     */
    readonly operation?: string;
    /**
     * Target hostname (e.g., "sandbox.demandware.net").
     */
    readonly host?: string;
    constructor(message: string, options: {
        kind: NetworkErrorKind;
        operation?: string;
        host?: string;
        cause?: unknown;
    });
}
/**
 * Classifies a network error by inspecting error properties.
 *
 * Checks error name, code (including nested cause.code for undici), and message content
 * to determine the kind of network failure.
 *
 * @param err - The error to classify
 * @returns Classified error kind
 */
export declare function classifyNetworkError(err: unknown): NetworkErrorKind;
/**
 * Checks if an error is a network-layer error (not an HTTP/application error).
 *
 * Returns true for thrown network errors like "fetch failed", AbortError, TimeoutError,
 * or errors with recognizable network error codes.
 *
 * Returns false for HTTPError and other application-level errors that should pass through untouched.
 *
 * @param err - The error to check
 * @returns true if this is a network error
 */
export declare function isNetworkError(err: unknown): boolean;
/**
 * Describes a network error kind with human-readable summary and actionable hint.
 *
 * @param kind - The network error kind
 * @returns Summary and hint for the error kind
 */
export declare function describeNetworkErrorKind(kind: NetworkErrorKind): {
    summary: string;
    hint: string;
};
/**
 * Wraps a network error with context about the failed operation and target host.
 *
 * If the error is already a NetworkError, returns it as-is (possibly filling in missing context).
 * If the error is not a network error (e.g., HTTPError), returns it unchanged.
 * Otherwise, classifies and wraps the error in a NetworkError with an actionable message.
 *
 * This function does NOT throw — it returns the wrapped or original error. The caller must throw it.
 *
 * @param err - The error to wrap
 * @param context - Operation and host context for the error
 * @returns The wrapped NetworkError, or the original error if it's not a network error
 *
 * @example
 * try {
 *   await fetch(url);
 * } catch (err) {
 *   throw wrapNetworkError(err, { operation: 'OAuth token request', host: 'account.demandware.com' });
 * }
 */
export declare function wrapNetworkError(err: unknown, context: {
    operation?: string;
    host?: string;
}): NetworkError | unknown;