convert arbiter length of hexdump string "0x...." to byte array

gistfile1.txt

var toBytes = (hexdump) => {
    var buff = new Uint8Array(hexdump.length / 2 - 1);
    var idx = 0;
    hexdump.substring(2).replace(/\w{2}/g, (m) => {
        buff[idx++] = parseInt(m, 16);
    });
    return buff;
}