/**
 * Convert an object into a byte buffer.
 *
 * @throws TypeError if input type is not supported
 */
export declare const coerceToBytes: (buffer: Uint8Array | ArrayBuffer) => Uint8Array;
/**
 * Convert passphrase into a byte buffer.
 *
 * @throws TypeError if input type is not supported
 */
export declare const passphraseBytes: (passphrase: string | Uint8Array | ArrayBuffer) => any;
/**
 * Allocate a buffer of specified length on Emscripten heap.
 */
export declare const heapAlloc: (length: number) => any;
/**
 * Move an array into Emscripten heap from JavaScript heap.
 */
export declare const heapPutArray: (array: number[] | Uint8Array, buffer: number) => void;
/**
 * Move an array from Emscripten heap into JavaScript heap.
 */
export declare const heapGetArray: (buffer: number, length: number) => Uint8Array;
/**
 * Free a buffer on Emscripten heap.
 */
export declare const heapFree: (buffer: number | undefined | null, length: number | undefined) => void;