[#BlockMerkleRoot]
= BlockMerkleRoot
:mrdocs:

Compute the Merkle root of the transactions in a block. *mutated is set to true if a duplicated subtree was found.

== Synopsis

Declared in `<consensus/merkle.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:uint256.adoc[uint256]
BlockMerkleRoot(
    xref:CBlock.adoc[CBlock] const& block,
    bool* mutated = nullptr);
----

== Return Value

The Merkle root of the block's transactions.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *block*
| The block whose transaction hashes form the tree leaves.
| *mutated*
| If non‐null, receives whether a duplicated subtree was found.
|===


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