Why aws express lambda can't invoke pure lambda fucntion? - node.js

Question

I am very new in this lambda stuffs.
I have an express app. I have uploaded the app as it is using claudia to aws lambda.
I have anothe app that is pure lambda app.
When I invoke the pure lambda function from my express app in local host, it works.
But when I call it form the express lambda function, it returns a 502 error.
I am not understanding the issue. Is it happening because I have uploaded the express app as it is(all other apis/end-points are working) or is there any configuration issue?
Contorller
exports.paywithcard = async (req,res,next) =>{
let obj
try{
obj = await StripeService.payMoney(req.body)
obj = JSON.parse(obj.body)
req.body.paid_id = obj.charge.id
res.json({
message: "Payment Successful",
success: true,
updatedAsset:assetResponse[0]
})
}
catch(err){
res.json({
message: "Rejected",
success: false,
})
}
**the service file where I invoke the pure lambda function
exports.payMoney = async(user)=>{
return await new Promise((resolve, reject) =>{
const params = {
FunctionName:'stripe_payment',
Payload: JSON.stringify({
user
})
}
console.log(params," paramsssssssssss")
lambda.invoke(params,(err,results)=>{
console.log(err," err and resultssssssssssssssssss ")
if(err) reject(err)
else {
//console.log("results ",results," results")
let res_obj = JSON.parse(results.Payload)
//obj = JSON.parse(obj.body)
// obj = JSON.parse(obj.charge)
//console.log(obj.charge.id,)
resolve(res_obj)
//return obj.charge.id
}
})
})
}
The pure Lambda function that has been being invoked
const stripe = require("stripe")(process.env.STRIPE_SECRET_TEST)
exports.handler = async (event, context, callback) => {
console.log("Hello worls!!!!!")
const requestBody = event.user;
console.log((requestBody," request body !!!!!!!!!"))
const token = requestBody.id;
const amount = requestBody.amount;
const currency = "USD";
const customer = requestBody.customer
console.log("req body",requestBody)
return stripe.paymentIntents.create({ // Create Stripe charge with token
amount,
currency,
description: 'Serverless Stripe Test charge',
payment_method: token,
customer,
confirm: true
})
.then((charge) => { // Success response
console.log(charge," charge")
const response = {
statusCode: 200,
headers: {
'Access-Control-Allow-Origin': 'https://stage-back.eidverse.io',
},
body: JSON.stringify({
message: `Charge processed succesfully!`,
charge,
}),
"isBase64Encoded": false,
};
callback(null, response);
})
.catch((err) => { // Error response
console.log(err,"err charge")
const response = {
statusCode: 500,
headers: {
'Access-Control-Allow-Origin': '*',
},
body: JSON.stringify({
error: err.message,
}),
};
callback(null, response);
})
};
There is no try catch issue in the console log.
Task timed out after 6.01 seconds
Please let me know if any other information I have missed to share. Thank you.