[#wallet-DescriptorScriptPubKeyMan-FillPSBT]
= xref:wallet.adoc[wallet]::xref:wallet/DescriptorScriptPubKeyMan.adoc[DescriptorScriptPubKeyMan]::FillPSBT
:relfileprefix: ../../
:mrdocs:

Adds descriptor and derivation information to a PSBT and optionally signs it.

== Synopsis

Declared in `<wallet/scriptpubkeyman.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
std::optional<common::PSBTError>
FillPSBT(
    xref:PartiallySignedTransaction.adoc[PartiallySignedTransaction]& psbt,
    xref:PrecomputedTransactionData.adoc[PrecomputedTransactionData] const& txdata,
    xref:common/PSBTFillOptions.adoc[common::PSBTFillOptions] const& options,
    int* n_signed = nullptr) const override;
----

== Return Value

A PSBTError if filling failed, or nullopt on success.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *psbt*
| The partially signed transaction to fill, updated in place.
| *txdata*
| Precomputed transaction data used during signing.
| *options*
| Options controlling what is filled in and whether to sign.
| *n_signed*
| If not null, set to the number of inputs signed.
|===


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