[HELP] rpc_methods error "KeyError: 'dict'" of opcua connector

[NujabesNB]

I use "Prosys OPC UA Simulation Server" to simulation my opcua data;

here is part of my opcua.json.

"mapping": [
      {
        "deviceNodePattern": "Root\\.Objects\\.AIR\\.roleSetDevice",
        "deviceNamePattern": "roleSetDevice",
        "attributes": [
          {
            "key": "roleName",
            "path": "${roleName}"
          }
        ],
        "timeseries": [
          {
            "key": "VAC_A",
            "path": "${VAC_A}"
          }
        ],
        "rpc_methods": [
          {
            "method": "AddRole"
          }
        ]
      }
    ]

I can get attributes value and timeseries value，but when I test rpc method, gateway report error.

I use swagger api /rpc/twoway/{deviceId} to test rpc method. Here is my params: { "method": "AddRole", "params": { "InputArguments":"wrath" }, "persistent": false, "timeout": 5000 }

error:

""2023-05-12 10:52:55" - |ERROR| - [opcua_connector.py] - opcua_connector - server_side_rpc_handler - 300 - 'dict'"
Traceback (most recent call last):
  File "/home/wrath/workdir/chentangguan/thingsboard_gateway/connectors/opcua/opcua_connector.py", line 288, in server_side_rpc_handler
    result = method["node"].call_method(method[rpc_method], arguments)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/common/node.py", line 685, in call_method
    return opcua.common.methods.call_method(self, methodid, *args)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/common/methods.py", line 17, in call_method
    result = call_method_full(parent, methodid, *args)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/common/methods.py", line 40, in call_method_full
    result = _call_method(parent.server, parent.nodeid, methodid, to_variant(*args))
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/common/methods.py", line 51, in _call_method
    results = server.call(methodstocall)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/client/ua_client.py", line 602, in call
    data = self._uasocket.send_request(request)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/client/ua_client.py", line 81, in send_request
    future = self._send_request(request, callback, timeout, message_type)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/client/ua_client.py", line 55, in _send_request
    binreq = struct_to_binary(request)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 261, in struct_to_binary
    packet.append(to_binary(uatype, val))
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 284, in to_binary
    return struct_to_binary(val)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 256, in struct_to_binary
    packet.append(list_to_binary(uatype[6:], val))
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 296, in list_to_binary
    pack = [to_binary(uatype, el) for el in val]
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 296, in <listcomp>
    pack = [to_binary(uatype, el) for el in val]
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 284, in to_binary
    return struct_to_binary(val)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 256, in struct_to_binary
    packet.append(list_to_binary(uatype[6:], val))
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 296, in list_to_binary
    pack = [to_binary(uatype, el) for el in val]
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 296, in <listcomp>
    pack = [to_binary(uatype, el) for el in val]
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 274, in to_binary
    return pack_uatype(vtype, val)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 192, in pack_uatype
    return variant_to_binary(value)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 378, in variant_to_binary
    b.append(pack_uatype(var.VariantType, var.Value))
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 188, in pack_uatype
    return extensionobject_to_binary(value)
  File "/home/wrath/workdir/chentangguan/venv/lib/python3.8/site-packages/opcua/ua/ua_binary.py", line 458, in extensionobject_to_binary
    TypeId = ua.extension_object_ids[obj.__class__.__name__]
KeyError: 'dict'

where should I set dict key?

• OS: [e.g. Ubuntu 20.04]
• Thingsboard IoT Gateway version [3.0.1]
• Python version[3.8]

[NujabesNB]

I guess i set wrong key in params;

{
  "method": "AddRole",
  "params": {
    "InputArguments":"wrath"
  },
  "persistent": false,
  "timeout": 5000
}

can any one tell me what key should i set in params？