@Moderator_2
Nothing is working neither
setInterval(() => {
WebSocketV2response.on("tick", async (response) => {
console.log(response);
});
}, 3000);
nor
setTimeout(function () {
WebSocketV2response.on("tick", async (response) => {
console.log(response);
});
}, 3000);
It's receving data continuosly after 3 sec in both the cases ?
@Moderator_2 said in WebSocketV2 fetchData function response:
Hi @greatworld
Action param on Websocket request represents zero to unsubscribe(feed stops) and one to subscribe(feed starts) the scripts.
For some scripts, we may not notice any changes on the ticks since there wont be any trade occurring for it. We provide feeds continuously that is received from exchange end.
If it is required to fetch data with latency time delay can be added. Kindly refer below
Ref:
https://masteringjs.io/tutorials/node/sleepRegards,
SmartAPI team
THANK YOU TEAM FOR YOUR SUPPORT
While fetching data using
let json_req = {
correlationID: "abcde12345",
action: 1,
mode: 3,
exchangeType: data.exchanger === "NFO" ? 2 : 4,
tokens: marketToken[data.index],
};
WebSocketV2response.fetchData(json_req);
WebSocketV2response.on("tick", async (response) => {
});
when i provide 1 then i get data continuously but when i provide 0 then i receive pong as a data.
I want to receive data once for single request or continuously after few seconds or minutes but while providing 1 it is giving me the same data continuously for what i have requested without any latency because of which i am unable to compute on present data , it's get changes so fast , computing on present data is not possible.
How can i receive data with some latency so that i can computing on present value of data and again i request or by itself it sends data after few seconds or minutes it should fetch data using fetchData function ?
THANK YOU
@Moderator_2
I mean when i provide 1 then i get data continuously but when i provide 0 then i receive pong as a data.
I want to receive data once or few seconds later for what i have requested but while providing 1 it is giving me the same data continuously for what i have requested.
How can i receive data with some latency so that i can computing on present value of data and again i request or by itself after few seconds or minutes it should fetch data using fetchData function ?
THANK YOU
While fetching data using
let json_req = {
correlationID: "abcde12345",
action: 0,
mode: 3,
exchangeType: data.exchanger === "NFO" ? 2 : 4,
tokens: marketToken[data.index],
};
WebSocketV2response.fetchData(json_req);
WebSocketV2response.on("tick", async (response) => {
});
code what's the use of action (i.e. 0 and 1) ?
I need an api endpoint which response with a current market data of any index like strike price , ltp , volume , volume change,oi , oi change and ....
If you know how can i do that then please provide me the code to do it?
How can i fetch at the money strike price in node js.
What is the API endpoint for current at the money strike of any index?
Thank you
@Moderator_2
"next": "14.1.3",
I am using next js instead of node js to connect with WebSocketV2 directly from fronend.
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
while using fetchdata function from WebSocketV2
code :
web_socket.fetchData({
correlationID: "abcde12345",
action: 1,
params: {
mode: 1,
tokenList: [
{
exchangeType: 1,
tokens: ["10626", "5290"],
},
],
},
});
gives an error
error :
⨯ node_modules\smartapi-javascript\lib\websocket2.0.js (137:0) @ WebSocketV2.fetchData
⨯ Error: Invalid Mode value passed
at page (./src/app/page.jsx:63:16)
null
Error: Invalid Mode value passed
at WebSocketV2.fetchData (webpack-internal:///(rsc)/./node_modules/smartapi-javascript/lib/websocket2.0.js:137:11)
at eval (webpack-internal:///(rsc)/./node_modules/smartapi-javascript/lib/websocket2.0.js:52:14)
at Array.map (<anonymous>)
at WebSocket.onOpen (webpack-internal:///(rsc)/./node_modules/smartapi-javascript/lib/websocket2.0.js:51:20)
at callListener (webpack-internal:///(rsc)/./node_modules/ws/lib/event-target.js:290:14)
at WebSocket.onOpen (webpack-internal:///(rsc)/./node_modules/ws/lib/event-target.js:237:9)
at WebSocket.emit (node:events:518:28)
at WebSocket.setSocket (webpack-internal:///(rsc)/./node_modules/ws/lib/websocket.js:244:10)
at ClientRequest.eval (webpack-internal:///(rsc)/./node_modules/ws/lib/websocket.js:1009:15)
at ClientRequest.emit (node:events:518:28)
at TLSSocket.socketOnData (node:_http_client:575:11)
at TLSSocket.emit (node:events:518:28)
at addChunk (node:internal/streams/readable:559:12)
at readableAddChunkPushByteMode (node:internal/streams/readable:510:3)
at Readable.push (node:internal/streams/readable:390:5)
at TLSWrap.onStreamRead (node:internal/stream_base_commons:190:23)
at TLSWrap.callbackTrampoline (node:internal/async_hooks:130:17)
I think this error is due to the structure of passing parameter in fetchData function.
When i use fetchData function from WebSocketV2 instance then it gives the error that i have provided in photo
code :
web_socket.fetchData({
correlationID: "abcde12345",
action: 1,
params: {
mode: 1,
tokenList: [
{
exchangeType: 1,
tokens: ["10626", "5290"],
},
{
exchangeType: 5,
tokens: ["234230", "234235", "234219"],
},
],
},
});
I think this error is due to the way it's fetching in websocket2.0.js file,
it's fetch value as const { correlationID, action, mode, exchangeType, tokens } = json_req; but in documentation it is written as {
"correlationID": "abcde12345",
"action": 1,
"params": {
"mode": 1,
"tokenList": [
{
"exchangeType": 1,
"tokens": [
"10626",
"5290"
]
},
{
"exchangeType": 5,
"tokens": [
"234230",
"234235",
"234219"
]
}
]
}
}
I request you please provide appropriate solution.