Firebase Firestore REST example - rest

Question

Hello I am looking to write a script which uses firebase firestore and writes some json to a specific collection in firestore. I have done this with the realtime db but firestore is a tad different below is my Realtime db snippet that works.
curl -X POST \
-d '{"param1":"'"$1"'", "param2":"'"$2"'"}' \
https://xxxx.firebaseio.com/xxxx.json?
Thanks for the help

Answer 1

After Reading the documentation I got to this
curl -X POST \
-H "Content-Type: application/json" \
-d'{
"fields": {
"Field1": {
"stringValue": "'"$var1"'"
},
"Field2": {
"stringValue": "'"$var2"'"
},
"Field3": {
"stringValue": "$var3"
}
}
}'\"https://firestore.googleapis.com/v1beta1/projects/**PROJECT_ID**/databases/(default)/documents/**COLLECTION_ID**?&key=(YOUR API KEY)"

Answer 2

The accepted answer helped me, but it took me a long time to figure out how can I use data types other than stringValues, so I am adding this answer hoping someone finds this helpful in the future.
curl -X POST \
-H "Content-Type: application/json" \
-d' {
"fields": {
"Field1": {
"arrayValue": {
"values": [{
"mapValue": {
"fields": {
"key1": {
"stringValue": "val1"
},
"key2": {
"stringValue": "val2"
}
}
}
}]
}
},
"Field2": {
"integerValue": <intValue>
},
"Field3": {
"stringValue": "var3"
}
}
}'\"https://firestore.googleapis.com/v1beta1/projects/**PROJECT_ID**/databases/(default)/documents/**COLLECTION_ID**?&key=<YOUR WEB API KEY>"
Use this for reference.

Answer 3

example field value
var data = { "fields": { "productName":{"stringValue": dealname.toString()}, "companyname":{"stringValue": companyName.toString()}, "contact":{"stringValue": contact.toString()}, "email":{"stringValue": email.toString()}, "domain":{"stringValue": domain.toString()}, "createdate":{"stringValue": createdate.toString()}, "salesCode":{"stringValue": code.toString()}, "price":{"stringValue": amount.toString()}, "phone":{"stringValue": phone.toString()}, "orderId":{"stringValue": orderId.toString() } } };
more information firestore information