v4 first commit

io.go

@@ -0,0 +1,24 @@
+package webrtc
+
+import (
+	. "github.com/pion/webrtc/v3"
+)
+
+type WebRTCIO struct {
+	*PeerConnection
+	SDP string
+}
+
+func (IO *WebRTCIO) GetAnswer() (string, error) {
+	// Sets the LocalDescription, and starts our UDP listeners
+	answer, err := IO.CreateAnswer(nil)
+	if err != nil {
+		return "", err
+	}
+	gatherComplete := GatheringCompletePromise(IO.PeerConnection)
+	if err := IO.SetLocalDescription(answer); err != nil {
+		return "", err
+	}
+	<-gatherComplete
+	return IO.LocalDescription().SDP, nil
+}