/**
 * Takes a string of ascii characters and returns the corresponding 0x-prefixed hex string.
 *
 * @returns The hex representation of an ascii string.
 */
export declare const asciiStringToHexString: (asciiString: string) => string;
/**
 * Takes an optionally 0x-prefixed hex string and returns the ascii string.
 *
 * @returns The ascii representation of a hex string.
 */
export declare const hexStringToAsciiString: (hex: string) => string;