Why a flip a bin before hashing in this script?











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From How can I make this PHP merkle root script recursive?



function binFlipByteOrder($string) {
return implode('', array_reverse(str_split($string, 1)));
}


Why a flip?










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    up vote
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    down vote

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    From How can I make this PHP merkle root script recursive?



    function binFlipByteOrder($string) {
    return implode('', array_reverse(str_split($string, 1)));
    }


    Why a flip?










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      up vote
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      down vote

      favorite









      up vote
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      From How can I make this PHP merkle root script recursive?



      function binFlipByteOrder($string) {
      return implode('', array_reverse(str_split($string, 1)));
      }


      Why a flip?










      share|improve this question









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      Nicolas Cantu is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      From How can I make this PHP merkle root script recursive?



      function binFlipByteOrder($string) {
      return implode('', array_reverse(str_split($string, 1)));
      }


      Why a flip?







      blockchain php






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      edited Nov 27 at 0:42









      Glorfindel

      2401412




      2401412






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      asked Nov 26 at 15:08









      Nicolas Cantu

      135




      135




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          Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?






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          • Ok thanks you! (I suspected the Lilliputians..)
            – Nicolas Cantu
            Nov 26 at 15:37












          • haha they are alive and well in Bitcoin... :)
            – JBaczuk
            Nov 26 at 15:37










          • Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
            – Nicolas Cantu
            Nov 27 at 0:26











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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          3
          down vote



          accepted










          Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?






          share|improve this answer





















          • Ok thanks you! (I suspected the Lilliputians..)
            – Nicolas Cantu
            Nov 26 at 15:37












          • haha they are alive and well in Bitcoin... :)
            – JBaczuk
            Nov 26 at 15:37










          • Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
            – Nicolas Cantu
            Nov 27 at 0:26















          up vote
          3
          down vote



          accepted










          Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?






          share|improve this answer





















          • Ok thanks you! (I suspected the Lilliputians..)
            – Nicolas Cantu
            Nov 26 at 15:37












          • haha they are alive and well in Bitcoin... :)
            – JBaczuk
            Nov 26 at 15:37










          • Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
            – Nicolas Cantu
            Nov 27 at 0:26













          up vote
          3
          down vote



          accepted







          up vote
          3
          down vote



          accepted






          Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?






          share|improve this answer












          Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 26 at 15:28









          JBaczuk

          3,6641321




          3,6641321












          • Ok thanks you! (I suspected the Lilliputians..)
            – Nicolas Cantu
            Nov 26 at 15:37












          • haha they are alive and well in Bitcoin... :)
            – JBaczuk
            Nov 26 at 15:37










          • Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
            – Nicolas Cantu
            Nov 27 at 0:26


















          • Ok thanks you! (I suspected the Lilliputians..)
            – Nicolas Cantu
            Nov 26 at 15:37












          • haha they are alive and well in Bitcoin... :)
            – JBaczuk
            Nov 26 at 15:37










          • Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
            – Nicolas Cantu
            Nov 27 at 0:26
















          Ok thanks you! (I suspected the Lilliputians..)
          – Nicolas Cantu
          Nov 26 at 15:37






          Ok thanks you! (I suspected the Lilliputians..)
          – Nicolas Cantu
          Nov 26 at 15:37














          haha they are alive and well in Bitcoin... :)
          – JBaczuk
          Nov 26 at 15:37




          haha they are alive and well in Bitcoin... :)
          – JBaczuk
          Nov 26 at 15:37












          Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
          – Nicolas Cantu
          Nov 27 at 0:26




          Of course it's a little big part of Internet (Cohen) and a community story :) So they are well in Bitcoin :)
          – Nicolas Cantu
          Nov 27 at 0:26










          Nicolas Cantu is a new contributor. Be nice, and check out our Code of Conduct.










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