[#IsBIP30Repeat]
= IsBIP30Repeat
:mrdocs:

Identifies blocks that overwrote an existing coinbase output in the UTXO set (see BIP30)&period;

== Synopsis

Declared in `&lt;validation&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
IsBIP30Repeat(xref:CBlockIndex.adoc[CBlockIndex] const& block&lowbar;index);
----

== Return Value

true if the block is a BIP30 repeat&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *block&lowbar;index*
| Block index entry of the block being checked&period;
|===


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