Years ago i worte keccak_ex with only support for hash 256

Now I completed the support for hash 512 and 128 bytes

The “problem”
Both implementation are the same ( copy and paste) and just change

for hash 256

  @digest_length 32

  @block_length 200 - 2 * @digest_length

for hash 512

  @digest_length 64

  @block_length 200 - 2 * @digest_length

i thik something like an “interface/inheritance” can help with all the duplicated code making an isolation with the concret type but i cant find anything like that

the other problematic line is

defp process_block_decode_loop(%__MODULE__{} = value, index) when index < @block_length do

because you need the block_length to make the loop work…

i appretiate any idea/insight/suggestion to make the code looks better and to learn a better way