[#CTxMemPool-CalculateDescendants-06]
= xref:CTxMemPool.adoc[CTxMemPool]::CalculateDescendants
:relfileprefix: ../
:mrdocs:

Populate setDescendants with all in‐mempool descendants of given transaction. Assumes that setDescendants includes all in‐mempool descendants of anything already in it.

== Synopsis

Declared in `<txmempool.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f95135d2fa8), requires_capability(0x7f9501b12388), requires_capability(0x7f950ec78578), requires_capability(0x7f9525ea82c8), requires_capability(0x7f9515097a08), requires_capability(0x7f950826bca8), requires_capability(0x7f94f856f3b8), requires_capability(0x7f9513c595a8)]]
void
CalculateDescendants(
    xref:CTxMemPool/txiter.adoc[txiter] it,
    xref:CTxMemPool/setEntries.adoc[setEntries]& setDescendants) const;
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *it*
| Iterator to the transaction whose descendants are collected.
| *setDescendants*
| The set that is populated with the descendants.
|===


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