[#PreCheckEphemeralTx]
= PreCheckEphemeralTx
:mrdocs:

Called for each transaction once transaction fees are known. Does context‐less checks about a single transaction.

== Synopsis

Declared in `<policy/ephemeral_policy.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
PreCheckEphemeralTx(
    xref:CTransaction.adoc[CTransaction] const& tx,
    xref:CFeeRate.adoc[CFeeRate] dust_relay_rate,
    xref:CAmount.adoc[CAmount] base_fee,
    xref:CAmount.adoc[CAmount] mod_fee,
    xref:TxValidationState.adoc[TxValidationState]& state);
----

== Return Value

false if the fee is non‐zero and dust exists, populating state. True otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *tx*
| Transaction being checked for ephemeral‐dust compliance.
| *dust_relay_rate*
| Fee rate used to decide which outputs count as dust.
| *base_fee*
| Unmodified fee the transaction pays.
| *mod_fee*
| Fee after any priority modifications applied by the mempool.
| *state*
| Set with the rejection reason when the check fails.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#