[#ExternalSigner]
= ExternalSigner
:mrdocs:

Enables interaction with an external signing device or service, such as a hardware wallet. See doc/external‐signer.md

== Synopsis

Declared in `<external_signer.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class ExternalSigner;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:ExternalSigner/2constructor.adoc[`ExternalSigner`]         [.small]#[constructor]#
| Constructs a signer bound to a command, chain, fingerprint and name.
| xref:ExternalSigner/DisplayAddress.adoc[`DisplayAddress`] 
| Display address on the device. Calls `<command> ‐‐fingerprint <fingerprint> ‐‐chain <chain> displayaddress ‐‐desc <descriptor>`.
| xref:ExternalSigner/GetDescriptors.adoc[`GetDescriptors`] 
| Get receive and change Descriptor(s) from device for a given account. Calls `<command> ‐‐fingerprint <fingerprint> ‐‐chain <chain> getdescriptors ‐‐account <account>`.
| xref:ExternalSigner/SignTransaction.adoc[`SignTransaction`] 
| Sign PartiallySignedTransaction on the device. Calls `<command> ‐‐stdin ‐‐fingerprint <fingerprint> ‐‐chain <chain>` and passes the `signtx` command and PSBT via stdin.
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:ExternalSigner/Enumerate.adoc[`Enumerate`] 
| Obtain a list of signers. Calls `<command> enumerate`.
|===


== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:ExternalSigner/m_fingerprint.adoc[`m_fingerprint`] 
| Master key fingerprint of the signer
| xref:ExternalSigner/m_name.adoc[`m_name`] 
| Name of signer
|===



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