def nethash interval = 500, start = 0, stop = false
      suffixe = stop ? "/#{stop}" : ''
      JSON.parse(call_blockchain_api("nethash/#{interval}/#{start}#{suffixe}?format=json"))
    end
def nethash interval = 500, start = 0, stop = false
      suffixe = stop ? "/#{stop}" : ''
      JSON.parse(call_blockchain_api("nethash/#{interval}/#{start}#{suffixe}?format=json"))
    end
shows statistics about difficulty and network power

 /nethash/INTERVAL/START/STOP
 Default INTERVAL=500, START=0, STOP=infinity.

 See http://dogechain.info/chain/Dogecoin/q/nethash