[#ChainCode-IsNull]
= xref:ChainCode.adoc[ChainCode]::IsNull
:relfileprefix: ../
:mrdocs:

Returns true if every byte of the blob is zero.

== Synopsis

Declared in `<uint256.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
bool
IsNull() const;
----

== Return Value

true if all bytes of the blob are zero.


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