Re: Ruby Quiz - Challenge #5 - Crypto Mining - Find the Winning Lucky Number - Nonce (=Number used ONCE) for the Proof-of-Work (PoW) Hash (SHA-256)

Hello Ruby Quiz Friends,

   For your reference here's the test solution for Ruby Quiz #5 -
Crypto Mining - Find the Winning Lucky Number - Nonce
(=Number used ONCE) for the Proof-of-Work (PoW) Hash (SHA-256) [1]:

def compute_nonce( data )
   nonce = 0
   loop do
     hash = Digest::SHA256.hexdigest( "#{nonce}#{data}" )
     break if hash.start_with?( "0000" )  # bingo!
     nonce += 1                                      # keep trying and
trying ...
   end
   nonce
end

   Happy crypto mining w/ ruby. Cheers. Prost.

[1] https://github.com/planetruby/quiz/tree/master/005

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