Small bugfix to data channel transmissions.

Author: kanawish

webrtc-kmp/src/jsMain/kotlin/com/shepeliev/webrtckmp/DataChannel.kt

@@ -3,6 +3,8 @@ package com.shepeliev.webrtckmp
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.asSharedFlow
+import org.khronos.webgl.ArrayBuffer
+import org.khronos.webgl.Int8Array
 
 actual class DataChannel internal constructor(val js: RTCDataChannel) {
     actual val id: Int
@@ -43,11 +45,14 @@ actual class DataChannel internal constructor(val js: RTCDataChannel) {
         js.onclosing = { _onClosing.tryEmit(Unit) }
         js.onclose = { _onClose.tryEmit(Unit) }
         js.onerror = { _onError.tryEmit(it.message) }
-        js.onmessage = { _onMessage.tryEmit(it.data.encodeToByteArray()) }
+        js.onmessage = {
+            _onMessage.tryEmit(Int8Array(it.data).unsafeCast<ByteArray>())
+        }
     }
 
     actual fun send(data: ByteArray): Boolean {
-        js.send(data.decodeToString())
+        val conversion = data.unsafeCast<Int8Array>()
+        js.send(conversion)
         return true
     }
 

webrtc-kmp/src/jsMain/kotlin/com/shepeliev/webrtckmp/externals.kt

@@ -1,5 +1,6 @@
 package com.shepeliev.webrtckmp
 
+import org.khronos.webgl.ArrayBuffer
 import org.w3c.dom.mediacapture.MediaStream
 import org.w3c.dom.mediacapture.MediaStreamTrack
 import kotlin.js.Date
@@ -88,7 +89,7 @@ external class RTCDataChannel {
 }
 
 external class MessageEvent {
-    val data: String
+    val data: ArrayBuffer
 }
 
 external class ErrorEvent {