Proper getmemorypool data endianness? As there are a couple endiannesses used by Bitcoin, what is the proper way to encode the data parameter for a getmemorypool JSON API call?
The "data" is not a number (only numbers have endian issues), but the raw byte data of a valid block. You may wish to read over BIP 22, which is the Draft-status standard detailing the getmemorypool protocol.