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chore(hashing): update comments of fn merkle_root

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Signed-off-by: Johns Beharry <johns@peakshift.com>
This commit is contained in:
Johns Beharry 2019-02-28 15:59:45 +01:00
parent 1c161e751f
commit 8429f3bff1
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1 changed files with 3 additions and 6 deletions
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9
eth2/utils/hashing/src/lib.rs
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@ -8,13 +8,11 @@ pub fn hash(input: &[u8]) -> Vec<u8> {
result
}
/// Generate Merkle Root
///
/// Outputs a `Vec<u8>` byte array of the merkle root given a set of leaf node values.
/// Expects leaf nodes to already be hashed.
// Get merkle root of some hashed values - the input leaf nodes is expected to already be hashed
// Outputs a `Vec<u8>` byte array of the merkle root given a set of leaf node values.
pub fn merkle_root(values: &[Vec<u8>]) -> Vec<u8> {
let values_len = values.len();
// vector to store hashes
// filled with 0 as placeholders
let mut o: Vec<Vec<u8>> = vec![vec![0]; values_len];
@ -82,6 +80,5 @@ mod tests {
let expected = hash(&root[..]);
assert_eq!(&expected[..], output.as_slice());
}
}