I found this example:

Current merkle hash list: 32650049a0418e4380db0af81788635d8b65424d397170b8499cdc28c4d27006 30861db96905c8dc8b99398ca1cd5bd5b84ac3264a4e1b3e65afa1bcee7540c4

Current merkle hash list: d47780c084bad3830bcdaf6eace035e4c6cbf646d103795d22104fb105014ba3

I have tried to calculate the hash using PHP:

$v=hash('sha256', hash('sha256',$tx1.$tx2) );

But I got:

What is wrong?

  • 2
    you should hash the binary data, not the human-readable hexadecimal representation – amaclin Oct 16 '17 at 9:32
  • @amaclin Sounds like that should be an answer, not just a comment – Pieter Wuille Oct 17 '17 at 17:38

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