It got connected and worked very fine with all the function defined in WebSocketV2 leaving WebSocketV2.fetchData function in smartapi-javascript\lib\websocket2.0.js which is upload in your github repo https://github.com/angel-one/smartapi-javascript/blob/main/lib/websocket2.0.js.

In documentation it said to pass parameter like :
{
"correlationID": "abcde12345",
"action": 1,
"params": {
"mode": 1,
"tokenList": [
{
"exchangeType": 1,
"tokens": [
"10626",
"5290"
]
},
{
"exchangeType": 5,
"tokens": [
"234230",
"234235",
"234219"
]
}
]
}
}

but while retriving in WebSocketV2.fetchData function which is in line number 127 of https://github.com/angel-one/smartapi-javascript/blob/main/lib/websocket2.0.js file is like

const { correlationID, action, mode, exchangeType, tokens } = json_req;

but i am passing data in different structure , so as to retrive the data i pass it has to be like :

const { correlationID, action, params : {mode, tokenList :{exchangeType, tokens} }} = json_req;

I request please provide the solution as soon as possible.
Thank you

"next": "14.1.3",

I am using next js instead of node js to conncect directly with WebSocketV2 from frontend and it's working fine for other functions define in WebSocketV2.

The only problem I see is in fetchdata function defined in smartapi-javascript\lib\websocket2.0.js file which is upload in your github https://github.com/angel-one/smartapi-javascript/blob/main/lib/websocket2.0.js

The structure of sending the data to websocket2.0 is describe as
{
"correlationID": "abcde12345",
"action": 1,
"params": {
"mode": 1,
"tokenList": [
{
"exchangeType": 1,
"tokens": [
"10626",
"5290"
]
},
{
"exchangeType": 5,
"tokens": [
"234230",
"234235",
"234219"
]
}
]
}
}
whereas at receiving end of fetchData function which is
const { correlationID, action, mode, exchangeType, tokens } = json_req;
couldn't fetch request data because it is not in fromat of
{ correlationID, action, mode, exchangeType, tokens }

It should be
const {
correlationID,
action,
params :
{
mode,
tokenList :{
exchangeType, tokens
}
}
} = json_req;

Please solve the issue as soon as possible.
Thank you

Please share the SDK version consumed at your end.

Regards,
SmartAPI team