wallet: add a stop_wallet RPC call

src/wallet/wallet_rpc_server.cpp

@@ -628,4 +628,27 @@ namespace tools
 
       return true;
   }
+  bool wallet_rpc_server::on_stop_wallet(const wallet_rpc::COMMAND_RPC_STOP_WALLET::request& req, wallet_rpc::COMMAND_RPC_STOP_WALLET::response& res, epee::json_rpc::error& er)
+  {
+    if (m_wallet.restricted())
+    {
+      er.code = WALLET_RPC_ERROR_CODE_DENIED;
+      er.message = "Command unavailable in restricted mode.";
+      return false;
+    }
+
+    try
+    {
+      send_stop_signal();
+      m_wallet.store();
+    }
+    catch (std::exception& e)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = e.what();
+      return false;
+    }
+    return true;
+  }
+  //------------------------------------------------------------------------------------------------------------------------------
 }