[#IsRBFOptInEmptyMempool]
= IsRBFOptInEmptyMempool
:mrdocs:

Determine the RBF signaling state of a transaction assuming an empty mempool&period;

== Synopsis

Declared in `&lt;policy&sol;rbf&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:RBFTransactionState.adoc[RBFTransactionState]
IsRBFOptInEmptyMempool(xref:CTransaction.adoc[CTransaction] const& tx);
----

== Return Value

The rbf state derived from the transaction&apos;s own sequence numbers&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *tx*
| The unconfirmed transaction to inspect&period;
|===


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