@imported('echoserver')
def echo(msg: bytes) -> bytes:
	pass

@imported('prelude')
def log_bytes(data: bytes) -> None:
	pass

@imported('prelude')
def sleep(seconds: u32) -> None:
	pass

@exported
def on_module_loaded() -> None:
	log_bytes(b'Echo client starting up, calling server')
	sleep(8)
	log_bytes(echo(b'Hello, world!'))
	sleep(8)
	log_bytes(echo(b'Bye, world!'))