Fix memcopy param order #27
Merged
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Problem
The call to copyMem, during HKDFSplit was copying data in the wrong direction. This meant that the function was returning bad data. E.g. zeros for the initial Root, and chainSend keys.
Solution
Change the parameter order to match docs: https://nim-lang.org/docs/system.html#copyMem%2Cpointer%2Cpointer%2CNatural
Notes
Until the tests execute known test vectors, data from the poc implementation cannot be trusted for accuracy