[#ExternalSigner-2constructor]
= xref:ExternalSigner.adoc[ExternalSigner]::ExternalSigner
:relfileprefix: ../
:mrdocs:

Constructs a signer bound to a command, chain, fingerprint and name.

== Synopsis

Declared in `<external_signer.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
ExternalSigner(
    std::vector<std::string> command,
    std::string chain,
    std::string fingerprint,
    std::string name);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *command* [in]
| the command which handles interaction with the external signer
| *fingerprint* [in]
| master key fingerprint of the signer
| *chain* [in]
| "main", "test", "signet", "regtest" or "testnet4"
| *name* [in]
| device name
|===


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