The read-only RTCPeerConnection property peerIdentity returns a JavaScript Promise that resolves to an RTCIdentityAssertion which contains a string identifying the remote peer. Once this promise resolves successfully, the resulting identity is the target peer identity and cannot change for the duration of the connection.

A JavaScript Promise which resolves to an RTCIdentityAssertion that describes the remote peer's identity.

If an error occurs while attempting to validate an incoming identity assertion (that is, the information describing a peer's identity), the promise is rejected. If there isn't already a target peer identity, peerIdentity is set to a newly created promise and the process begins again, until the process succeeds or no further attempts to authenticate occur.

In this example, a function, getIdentityAssertion(), is created which asynchronously waits for the peer's identity to be verified, then returns the identity to the caller. If an error occurs and the promise is rejected, this logs the error to the console and returns null to the caller.

let pc = new RTCPeerConnection();

// …

async function getIdentityAssertion(pc) {
  try {
    const identity = await pc.peerIdentity;
    return identity;
  } catch (err) {
    console.log("Error identifying remote peer: ", err);
    return null;
  }
}

• WebRTC API