[#wallet-CalculateMaximumSignedTxSize-0d]
= xref:wallet.adoc[wallet]::CalculateMaximumSignedTxSize
:relfileprefix: ../
:mrdocs:

Calculate the size of the transaction, looking up previous outputs from the wallet.

== Synopsis

Declared in `<wallet/spend.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f2e1e5eb5d0)]]
xref:wallet/TxSize.adoc[TxSize]
CalculateMaximumSignedTxSize(
    xref:CTransaction.adoc[CTransaction] const& tx,
    xref:wallet/CWallet.adoc[CWallet] const* wallet,
    xref:wallet/CCoinControl.adoc[CCoinControl] const* coin_control = nullptr);
----

== Return Value

The estimated virtual size and weight of the signed transaction.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *tx*
| The transaction whose signed size is estimated.
| *wallet*
| The wallet that owns the inputs and provides signing information.
| *coin_control*
| Coin control settings used to decide whether to expect signature grinding.
|===


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