[#CPartialMerkleTree-CalcHash]
= xref:CPartialMerkleTree.adoc[CPartialMerkleTree]::CalcHash
:relfileprefix: ../
:mrdocs:

calculate the hash of a node in the merkle tree (at leaf level: the txid's themselves)

== Synopsis

Declared in `<merkleblock.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:uint256.adoc[uint256]
CalcHash(
    int height,
    unsigned int pos,
    std::vector<Txid> const& vTxid);
----

== Return Value

The hash of the requested node.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *height*
| The tree level of the node, counted from the leaf level (height 0) upward.
| *pos*
| The position of the node within its level.
| *vTxid*
| The full list of transaction ids for the block.
|===


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