I’m still implementing the Data Types for server -> client transmission as well as the traits necessary (I changed them like 4 times, and some changes meant a reimplementation of existing impls). Now there is just a Transfer trait for types that are ready to transmit (≙ types that can easily write their transmission data to, e. g., a tcp stream or a buffer around one). The implementation now is supposed to be correct, but not necessarily the fastest / most memory efficient one, I will come back to do that later. I already implemented a majority of the data types, prominently lacking NBT (efficient binary data format), some JSON stuff (I guess) and a few small other things, I won’t do the debug data types until I need them. Below is a screenshot of the trait the code I wrote is centered around.