wallet: add GetExternalSigner()

1 files changed, 10 insertions, 0 deletions

diff --git a/src/wallet/external_signer_scriptpubkeyman.cpp b/src/wallet/external_signer_scriptpubkeyman.cpp
index 3dff67f35d..b8bd69f941 100644
--- a/src/wallet/external_signer_scriptpubkeyman.cpp
+++ b/src/wallet/external_signer_scriptpubkeyman.cpp
@@ -33,4 +33,14 @@ bool ExternalSignerScriptPubKeyMan::SetupDescriptor(std::unique_ptr<Descriptor>
     return true;
 }
 
+ExternalSigner ExternalSignerScriptPubKeyMan::GetExternalSigner() {
+    const std::string command = gArgs.GetArg("-signer", "");
+    if (command == "") throw std::runtime_error(std::string(__func__) + ": restart bitcoind with -signer=<cmd>");
+    std::vector<ExternalSigner> signers;
+    ExternalSigner::Enumerate(command, signers, Params().NetworkIDString());
+    if (signers.empty()) throw std::runtime_error(std::string(__func__) + ": No external signers found");
+    // TODO: add fingerprint argument in case of multiple signers
+    return signers[0];
+}
+
 #endif