[#wallet-CWallet-UpdateWalletTxFn]
= xref:wallet.adoc[wallet]::xref:wallet/CWallet.adoc[CWallet]::UpdateWalletTxFn
:relfileprefix: ../../
:mrdocs:

Callback for updating transaction metadata in mapWallet.

== Synopsis

Declared in `<wallet/wallet.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
using UpdateWalletTxFn = std::function<bool(xref:wallet/CWalletTx.adoc[CWalletTx]&, bool)>;
----

== Return Value

true if wtx is changed and needs to be saved to disk, otherwise false

== Parameters

[cols="1,4"]
|===
| Name| Description
| *wtx*
| ‐ reference to mapWallet transaction to update
| *new_tx*
| ‐ true if wtx is newly inserted, false if it previously existed
|===


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