node: add externalSigners to interface

Author: Sjors

src/interfaces/node.h

@@ -6,6 +6,7 @@
 #define BITCOIN_INTERFACES_NODE_H
 
 #include <amount.h>     // For CAmount
+#include <external_signer.h>
 #include <net.h>        // For NodeId
 #include <net_types.h>  // For banmap_t
 #include <netaddress.h> // For Network
@@ -110,6 +111,11 @@ class Node
     //! Disconnect node by id.
     virtual bool disconnectById(NodeId id) = 0;
 
+#ifdef ENABLE_EXTERNAL_SIGNER
+    //! List external signers
+    virtual std::vector<ExternalSigner> externalSigners() = 0;
+#endif
+
     //! Get total bytes recv.
     virtual int64_t getTotalBytesRecv() = 0;
 

src/node/interfaces.cpp

@@ -170,6 +170,16 @@ class NodeImpl : public Node
         }
         return false;
     }
+#ifdef ENABLE_EXTERNAL_SIGNER
+    std::vector<ExternalSigner> externalSigners() override
+    {
+        std::vector<ExternalSigner> signers = {};
+        const std::string command = gArgs.GetArg("-signer", "");
+        if (command == "") return signers;
+        ExternalSigner::Enumerate(command, signers, Params().NetworkIDString());
+        return signers;
+    }
+#endif
     int64_t getTotalBytesRecv() override { return m_context->connman ? m_context->connman->GetTotalBytesRecv() : 0; }
     int64_t getTotalBytesSent() override { return m_context->connman ? m_context->connman->GetTotalBytesSent() : 0; }
     size_t getMempoolSize() override { return m_context->mempool ? m_context->mempool->size() : 0; }