[#kernel-MemPoolOptions-expiry]
= xref:kernel.adoc[kernel]::xref:kernel/MemPoolOptions.adoc[MemPoolOptions]::expiry
:relfileprefix: ../../
:mrdocs:

How long a transaction may stay in the mempool before it expires.

== Synopsis

Declared in `<kernel/mempool_options.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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std::chrono::seconds expiry = {std::chrono::hours{DEFAULT_MEMPOOL_EXPIRY_HOURS}};
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