Create PeerConnection exception: Failed to construct 'RTCPeerConnection': Malformed RTCIceServer - node.js

Question

I am using appRTC to make demo app. I have setup following things successfully but got stack with JSON format that return in response of Turn-server API.
Use SSL for secure connect to make it work on Google Chrome (Done)
Implement custom WebSockets (Done)
Develop custom API for TurnServer (Done)
I am getting following error in console log.
Create PeerConnection exception: Failed to construct 'RTCPeerConnection': Malformed RTCIceServer
Failed to start signaling: Cannot read property 'addStream' of null
I have tried following responses as ice server object
Current object:
{"iceServers":[{"urls":["stun:stun.l.google.com:19302"]},{"urls":["turn:domain.com:8080?transport=udp","turn:domain.com:8080?transport=tcp","turn:domain.com:8080"],"username":"test","credential":"password"}],"lifetimeDuration":"86400s","blockStatus":"NOT_BLOCKED","iceTransportPolicy":"all"}
Have also tried:
[{"urls":["stun:stun.l.google.com:19302"]},{"urls":["turn:domain.com:8080?transport=udp","turn:domain.com:8080?transport=tcp","turn:domain.com:8080"],"username":"test","credential":"password"}]
and also tried this one:
[{"urls":["turn:domain.com:8080?transport=udp","turn:domain.com:8080?transport=tcp","turn:domain.com:8080"],"username":"test","credential":"password"}]

Answer 1

You have a typo here:
[{"urls":["stun:stun.l.google.com:19302"}
trying to close urls without closing the array.
This should be
[{"urls":["stun:stun.l.google.com:19302"]}
This doesn't result in an error about malformed RTCIceServer though.
Based on your comment it seems to be a result of calling
new RTCPeerConnection({"iceServers":[{}]})
-- an empty object is not a valid RTCIceServer.
I would also recommend not passing
"lifetimeDuration":"86400s","blockStatus":"NOT_BLOCKED"
to the RTCPeerConnection as it doesn't know about these.