/** Byte array, string, or Uint8Array accepted by buffer-coercion helpers */
export type ByteInput = string | number[] | Uint8Array;
/** Encoding identifier for buffer-coercion helpers */
export type ByteEncoding = 'hex' | 'utf8' | 'base64';
/**
 * Convert a value to an encoded string if currently an encoded string or number[] or Uint8Array.
 * @param val string or number[] or Uint8Array. If string, encoding must be hex. If number[], each value must be 0..255.
 * @param enc optional encoding type if val is string, defaults to 'hex'. Can be 'hex', 'utf8', or 'base64'.
 * @param returnEnc optional encoding type for returned string if different from `enc`, defaults to 'hex'. Can be 'hex', 'utf8', or 'base64'.
 * @returns hex encoded string representation of val.
 * @publicbody
 */
export declare function asString(val: ByteInput, enc?: ByteEncoding, returnEnc?: ByteEncoding): string;
/**
 * Convert a value to number[] if currently an encoded string or number[] or Uint8Array.
 * @param val string or number[] or Uint8Array. If string, encoding must be hex. If number[], each value must be 0..255.
 * @param enc optional encoding type if val is string, defaults to 'hex'. Can be 'hex', 'utf8', or 'base64'.
 * @returns number[] array of byte values representation of val.
 * @publicbody
 */
export declare function asArray(val: ByteInput, enc?: ByteEncoding): number[];
/**
 * Convert a value to Uint8Array if currently an encoded string or number[] or Uint8Array.
 * @param val string or number[] or Uint8Array. If string, encoding must be hex. If number[], each value must be 0..255.
 * @param enc optional encoding type if val is string, defaults to 'hex'. Can be 'hex', 'utf8', or 'base64'.
 * @returns Uint8Array representation of val.
 * @publicbody
 */
export declare function asUint8Array(val: ByteInput, enc?: ByteEncoding): Uint8Array;
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