/**
 * Encode a string into Uint8Array respecting the specified encoding.
 *
 * `TextEncoder` only supports UTF-8, so we need manual implementations for
 * other Node.js encodings (latin1, ascii, hex, base64, base64url).
 * This is used by the browser `Readable.push()` and `unshift()` to match
 * Node.js `Buffer.from(string, encoding)` behavior.
 */
export declare function stringToEncodedBytes(str: string, encoding?: string): Uint8Array;
/**
 * Normalize a binary-like value into Uint8Array.
 */
export declare const toBinaryChunk: (value: unknown) => Uint8Array | null;
/**
 * Convert any stream chunk to bytes for text decoding.
 * Handles: string, Uint8Array, ArrayBuffer, TypedArray, Array, array-like objects.
 * Returns null if the chunk type is not recognized.
 *
 * Shared by both Node.js and browser streamToString / streamToBuffer.
 */
export declare const toStreamBytes: (chunk: unknown) => Uint8Array | null;