[#ComputeTapbranchHash]
= ComputeTapbranchHash
:mrdocs:

Compute the BIP341 tapbranch hash from two branches. Spans must be 32 bytes each.

== Synopsis

Declared in `<script/interpreter.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:uint256.adoc[uint256]
ComputeTapbranchHash(
    std::span<unsigned char const> a,
    std::span<unsigned char const> b);
----

== Return Value

The combined tapbranch hash.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| The first 32‐byte branch hash.
| *b*
| The second 32‐byte branch hash.
|===


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