let message: [UInt8] = [
0x01,
21,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
UInt8(target & 0xFF),
UInt8(target >> 8 & 0xFF)
]
let message = new Uint8Array([
0x01,
21,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
target & 0xFF,
target >> 8 & 0xFF
]);