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Merge #18379: doc: Comment fix merkle.cpp

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5b59a19731827398aa32754d1f327178247d3199 Update merkle.cpp (4d55397500)

Pull request description:

  Change comment from `The reason is that if the number of hashes in the list at a given time
  is odd`, to ` The reason is that if the number of hashes in the list at a given level
         is odd` (to be a bit more precise: replacing `time` with `level`)

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ACKs for top commit:
  MarcoFalke:
    ACK 5b59a19731827398aa32754d1f327178247d3199
  instagibbs:
    ACK 5b59a19731

Tree-SHA512: 30d29b9855b30de8b54033ca4884cfb5bf8ab9e52cf61da237abba0e15ebff947c65f8ba82175694bc60ee0d54f940a098cadcb0404d3c3bcf577006ab0561a5
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MarcoFalke 2020-03-18 14:02:20 -04:00
commit dbb067da38
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2
src/consensus/merkle.cpp
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@ -10,7 +10,7 @@
that the following merkle tree algorithm has a serious flaw related to
duplicate txids, resulting in a vulnerability (CVE-2012-2459).
The reason is that if the number of hashes in the list at a given time
The reason is that if the number of hashes in the list at a given level
is odd, the last one is duplicated before computing the next level (which
is unusual in Merkle trees). This results in certain sequences of
transactions leading to the same merkle root. For example, these two