Angular Functions function resulting in "could not handle the request" error - node.js

Question

I have a relatively simple Firebase function that simply creates an https request to an API and then is supposed to do a couple writes to the database. However, even though it successfully completes the API call (I can see that in the debugger of the service), it always results in Error: could not handle request.
The Function
export const CreateNoonlightAlarm = functions.https.onRequest((request, response) => {
const options = {
host: noonlightURL,
path: "/dispatch/v1/alarms",
method: "POST",
headers: {
"Content-Type": "application/json",
Accept: "application/json",
Authorization: `Bearer ${noonlightToken}`,
},
};
var req = https.request(options, (res) => {
res.on("data", (response) => {
let data = JSON.parse(response);
const docRef = database
.collection("systems")
.doc(request.body.owner_id)
.collection("alarms")
.doc(data.id);
docRef
.set(data, { merge: true })
.catch((error: any) => console.log("docRef:", error));
const referenceRef = database
.collection("alarmsToSystems")
.doc(data.id);
referenceRef
.set({
alarm_id: data.id,
system_id: request.body.owner_id,
})
.catch((error: any) => console.log("referenceRef:", error));
response.send(response);
});
});
req.on("error", (e) => {
response.send(e);
});
req.write(JSON.stringify(request.body));
req.end();
}
);
Now, I have been at this for a while. I've tried removing everything inside the res.on("data", (response) => {} block except for the response.send(response); and I still received the error. I've also seen that many people had issues with Firebase actually updating the function and said to run firebase init again prior to running firebase deploy and that still isn't working out for me. I've also console logged things like the request.body.owner_id and the data.id to ensure they are readable, and they are. Other functions in the same file run perfectly fine when called and return what they are expected to return.
Am I missing something in allowing for this function to successfully run?

Answer 1

So, after another hour of troubleshooting and digging in line by line I realized something. You can not name two things the same thing in the same function.... It never turns out well.
In line 1, I defined the second parameter in the OnRequest() as response.
In line 14, I again defined response as the parameter in res.on().
So, as I changed the response on line 14 to res and then each corresponding use of said variable, the function began to work exactly as it was expected to be. The updated code can be found below.
export const CreateNoonlightAlarm = functions.https.onRequest((request, response) => {
const options = {
host: noonlightURL,
path: "/dispatch/v1/alarms",
method: "POST",
headers: {
"Content-Type": "application/json",
Accept: "application/json",
Authorization: `Bearer ${noonlightToken}`,
},
};
var req = https.request(options, (res) => {
res.on("data", (res) => {
let data = JSON.parse(res);
const docRef = database
.collection("systems")
.doc(request.body.owner_id)
.collection("alarms")
.doc(data.id);
docRef
.set(data, { merge: true })
.catch((error: any) => console.log("docRef:", error));
const referenceRef = database
.collection("alarmsToSystems")
.doc(data.id);
referenceRef
.set({
alarm_id: data.id,
system_id: request.body.owner_id,
})
.catch((error: any) => console.log("referenceRef:", error));
response.send(res);
});
});
req.on("error", (e) => {
response.send(e);
});
req.write(JSON.stringify(request.body));
req.end();
}
);