[#BIP32Hash]
= BIP32Hash
:mrdocs:

Computes the BIP32 child key derivation hash.

== Synopsis

Declared in `<hash.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
BIP32Hash(
    xref:ChainCode.adoc[ChainCode] const& chainCode,
    unsigned int nChild,
    unsigned char header,
    unsigned char const data[],
    unsigned char output[]);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *chainCode*
| The parent chain code.
| *nChild*
| The index of the child key being derived.
| *header*
| The header byte prepended to the hashed data.
| *data*
| The 32‐byte key material to hash.
| *output*
| The 64‐byte buffer to receive the resulting hash.
|===


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