[#GetVirtualTransactionInputSize]
= GetVirtualTransactionInputSize
:mrdocs:

Compute the virtual size of a single transaction input.

== Synopsis

Declared in `<policy/policy.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int64_t
GetVirtualTransactionInputSize(
    xref:CTxIn.adoc[CTxIn] const& tx,
    int64_t nSigOpCost,
    unsigned int bytes_per_sigop);
----

== Return Value

Virtual input size in vB.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *tx*
| Input to measure.
| *nSigOpCost*
| Signature operation cost of the input.
| *bytes_per_sigop*
| Bytes charged per signature operation.
|===


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