csprotocol

var (
	ReqVersion []byte
	RspVersion []byte
)

var VampRequest = vamp.NewUnion(vamp.Size8,
	vamp.MustNamed("hello", vamp.MustTypeOf(HelloRequest{})),
).WithAltReader(func(alt uint, into any) (any, error) {
	i := into.(*any)
	switch alt {
	case ReqIDHello:
		*i = new(HelloRequest)
		return *i, nil
	}
	return nil, fmt.Errorf("unknown request id %d", alt)
})

var VampResponse = vamp.NewUnion(vamp.Size8,
	vamp.MustNamed("empty", vamp.Uint16),
).WithAltReader(func(alt uint, into any) (any, error) {
	i := into.(*any)
	switch alt {
	case RspIDEmpty:
		*i = new(ResponseCode)
		return *i, nil
	}
	return nil, fmt.Errorf("unknown response id %d", alt)
})