A helper function to convert a byte array to hex (source: https://mkyong.com/java/java-how-to-convert-bytes-to-hex/)

byteArray_to_hex.js

function toHex(bArr) {
  var result = "";
  for (var i = 0; i < bArr.length; i++) {
    let dec = bArr[i] & 0xff;
    var hex = Java.use("java.lang.Integer").toHexString(dec);
    if (hex.length % 2 == 1) {
      hex = "0" + hex;
    }
    result += hex;
  }
  return result;
}