client

type Client struct {
	Session   *net2.Session
	RPCClient *grpc_util.RPCClient
	Codec     *MTProtoCodec

	RemoteAddr net.Addr
	LocalAddr  net.Addr

	// TODO(@benqi): 移到handshake处理器里
	Nonce       []byte // 每连接缓存客户端生成的Nonce
	ServerNonce []byte // 每连接缓存服务生成的ServerNonce
	NewNonce    []byte
	A           *big.Int
	P           *big.Int
}