/**
 * Coerce a value to a hex encoded string if currently a hex encoded string or number[]
 * @param val string or number[]. If string, encoding must be hex. If number[], each value must be 0..255.
 * @returns input val if it is a string; or if number[], converts byte values to hex
 * @publicbody
 */
export declare function asString(val: string | number[]): string;
export declare function asArray(val: string | number[]): number[];
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