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this._wrtc.RTCSessionDescription(e)).then(()=>{this.destroyed||(this._pendingCandidates.forEach(e=>{this._addIceCandidate(e)}),this._pendingCandidates=[],"offer"===this._pc.remoteDescription.type&&this._createAnswer())}).catch(e=>{this.destroy(a(e,"ERR_SET_REMOTE_DESCRIPTION"))}),e.sdp||e.candidate||e.renegotiate||e.transceiverRequest||this.destroy(a("signal() called with invalid signal data","ERR_SIGNALING"))}_addIceCandidate(e){var t=new this._wrtc.RTCIceCandidate(e);this._pc.addIceCandidate(t).catch(e=>{!t.address||t.address.endsWith(".local")?o("Ignoring unsupported ICE candidate."):this.destroy(a(e,"ERR_ADD_ICE_CANDIDATE"))})}send(e){this._channel.send(e)}addTransceiver(e,t){if(this._debug("addTransceiver()"),this.initiator)try{this._pc.addTransceiver(e,t),this._needsNegotiation()}catch(e){this.destroy(a(e,"ERR_ADD_TRANSCEIVER"))}else this.emit("signal",{transceiverRequest:{kind:e,init:t}})}addStream(e){this._debug("addStream()"),e.getTracks().forEach(t=>{this.addTrack(t,e)})}addTrack(e,t){this._debug("addTrack()");var n=this._senderMap.get(e)||new Map,r=n.get(t);if(!r)r=this._pc.addTrack(e,t),n.set(t,r),this._senderMap.set(e,n),this._needsNegotiation();else if(r.removed)throw a("Track has been removed. You should enable/disable tracks that you want to re-add.","ERR_SENDER_REMOVED");else throw a("Track has already been added to that stream.","ERR_SENDER_ALREADY_ADDED")}replaceTrack(e,t,n){this._debug("replaceTrack()");var r=this._senderMap.get(e),o=r?r.get(n):null;if(!o)throw a("Cannot replace track that was never added.","ERR_TRACK_NOT_ADDED");t&&this._senderMap.set(t,r),null==o.replaceTrack?this.destroy(a("replaceTrack is not supported in this browser","ERR_UNSUPPORTED_REPLACETRACK")):o.replaceTrack(t)}removeTrack(e,t){this._debug("removeSender()");var n=this._senderMap.get(e),r=n?n.get(t):null;if(!r)throw a("Cannot remove track that was never added.","ERR_TRACK_NOT_ADDED");try{r.removed=!0,this._pc.removeTrack(r)}catch(e){"NS_ERROR_UNEXPECTED"===e.name?this._sendersAwaitingStable.push(r):this.destroy(a(e,"ERR_REMOVE_TRACK"))}this._needsNegotiation()}removeStream(e){this._debug("removeSenders()"),e.getTracks().forEach(t=>{this.removeTrack(t,e)})}_needsNegotiation(){this._debug("_needsNegotiation"),this._batchedNegotiation||(this._batchedNegotiation=!0,c(()=>{this._batchedNegotiation=!1,this._debug("starting batched negotiation"),this.negotiate()}))}negotiate(){this.initiator?this._isNegotiating?(this._queuedNegotiation=!0,this._debug("already negotiating, queueing")):(this._debug("start negotiation"),setTimeout(()=>{this._createOffer()},0)):!this._isNegotiating&&(this._debug("requesting negotiation from initiator"),this.emit("signal",{renegotiate:!0})),this._isNegotiating=!0}destroy(e){this._destroy(e,()=>{})}_destroy(e,t){if(!this.destroyed){if(this._debug("destroy (error: %s)",e&&(e.message||e)),this.readable=this.writable=!1,this._readableState.ended||this.push(null),this._writableState.finished||this.end(),this.destroyed=!0,this._connected=!1,this._pcReady=!1,this._channelReady=!1,this._remoteTracks=null,this._remoteStreams=null,this._senderMap=null,clearInterval(this._closingInterval),this._closingInterval=null,clearInterval(this._interval),this._interval=null,this._chunk=null,this._cb=null,this._onFinishBound&&this.removeListener("finish",this._onFinishBound),this._onFinishBound=null,this._channel){try{this._channel.close()}catch(e){}this._channel.onmessage=null,this._channel.onopen=null,this._channel.onclose=null,this._channel.onerror=null}if(this._pc){try{this._pc.close()}catch(e){}this._pc.oniceconnectionstatechange=null,this._pc.onicegatheringstatechange=null,this._pc.onsignalingstatechange=null,this._pc.onicecandidate=null,this._pc.ontrack=null,this._pc.ondatachannel=null}this._pc=null,this._channel=null,e&&this.emit("error",e),this.emit("close"),t()}}_setupData(e){if(!e.channel)return this.destroy(a("Data channel event is missing `channel` property","ERR_DATA_CHANNEL"));this._channel=e.channel,this._channel.binaryType="arraybuffer","number"==typeof this._channel.bufferedAmountLowThreshold&&(this._channel.bufferedAmountLowThreshold=u),this.channelName=this._channel.label,this._channel.onmessage=e=>{this._onChannelMessage(e)},this._channel.onbufferedamountlow=()=>{this._onChannelBufferedAmountLow()},this._channel.onopen=()=>{this._onChannelOpen()},this._channel.onclose=()=>{this._onChannelClose()},this._channel.onerror=e=>{this.destroy(a(e,"ERR_DATA_CHANNEL"))};var t=!1;this._closingInterval=setInterval(()=>{this._channel&&"closing"===this._channel.readyState?(t&&this._onChannelClose(),t=!0):t=!1},5000)}_read(){}_write(e,t,n){if(this.destroyed)return n(a("cannot write after peer is destroyed","ERR_DATA_CHANNEL"));if(this._connected){try{this.send(e)}catch(e){return this.destroy(a(e,"ERR_DATA_CHANNEL"))}this._channel.bufferedAmount>u?(this._debug("start backpressure: bufferedAmount %d",this._channel.bufferedAmount),this._cb=n):n(null)}else this._debug("write before connect"),this._chunk=e,this._cb=n}_onFinish(){if(!this.destroyed){const e=()=>{setTimeout(()=>this.destroy(),1e3)};this._connected?e():this.once("connect",e)}}_startIceCompleteTimeout(){this.destroyed||this._iceCompleteTimer||(this._debug("started iceComplete timeout"),this._iceCompleteTimer=setTimeout(()=>{this._iceComplete||(this._iceComplete=!0,this._debug("iceComplete timeout completed"),this.emit("iceTimeout"),this.emit("_iceComplete"))},this.iceCompleteTimeout))}_createOffer(){this.destroyed||this._pc.createOffer(this.offerOptions).then(e=>{if(this.destroyed)return;this.trickle||this.allowHalfTrickle||(e.sdp=r(e.sdp)),e.sdp=this.sdpTransform(e.sdp);const t=()=>{if(!this.destroyed){var t=this._pc.localDescription||e;this._debug("signal"),this.emit("signal",{type:t.type,sdp:t.sdp})}};this._pc.setLocalDescription(e).then(()=>{this._debug("createOffer success"),this.destroyed||(this.trickle||this._iceComplete?t():this.once("_iceComplete",t))}).catch(e=>{this.destroy(a(e,"ERR_SET_LOCAL_DESCRIPTION"))})}).catch(e=>{this.destroy(a(e,"ERR_CREATE_OFFER"))})}_requestMissingTransceivers(){this._pc.getTransceivers&&this._pc.getTransceivers().forEach(e=>{e.mid||!e.sender.track||e.requested||(e.requested=!0,this.addTransceiver(e.sender.track.kind))})}_createAnswer(){this.destroyed||this._pc.createAnswer(this.answerOptions).then(e=>{if(this.destroyed)return;this.trickle||this.allowHalfTrickle||(e.sdp=r(e.sdp)),e.sdp=this.sdpTransform(e.sdp);const t=()=>{if(!this.destroyed){var t=this._pc.localDescription||e;this._debug("signal"),this.emit("signal",{type:t.type,sdp:t.sdp}),this.initiator||this._requestMissingTransceivers()}};this._pc.setLocalDescription(e).then(()=>{this.destroyed||(this.trickle||this._iceComplete?t():this.once("_iceComplete",t))}).catch(e=>{this.destroy(a(e,"ERR_SET_LOCAL_DESCRIPTION"))})}).catch(e=>{this.destroy(a(e,"ERR_CREATE_ANSWER"))})}_onConnectionStateChange(){this.destroyed||"failed"===this._pc.connectionState&&this.destroy(a("Connection failed.","ERR_CONNECTION_FAILURE"))}_onIceStateChange(){if(!this.destroyed){var e=this._pc.iceConnectionState,t=this._pc.iceGatheringState;this._debug("iceStateChange (connection: %s) (gathering: %s)",e,t),this.emit("iceStateChange",e,t),("connected"===e||"completed"===e)&&(this._pcReady=!0,this._maybeReady()),"failed"===e&&this.destroy(a("Ice connection failed.","ERR_ICE_CONNECTION_FAILURE")),"closed"===e&&this.destroy(a("Ice connection closed.","ERR_ICE_CONNECTION_CLOSED"))}}getStats(e){const t=e=>("[object Array]"===Object.prototype.toString.call(e.values)&&e.values.forEach(t=>{Object.assign(e,t)}),e);0===this._pc.getStats.length||this._isReactNativeWebrtc?this._pc.getStats().then(n=>{var r=[];n.forEach(e=>{r.push(t(e))}),e(null,r)},t=>e(t)):0<this._pc.getStats.length?this._pc.getStats(n=>{if(!this.destroyed){var r=[];n.result().forEach(e=>{var n={};e.names().forEach(t=>{n[t]=e.stat(t)}),n.id=e.id,n.type=e.type,n.timestamp=e.timestamp,r.push(t(n))}),e(null,r)}},t=>e(t)):e(null,[])}_maybeReady(){if(this._debug("maybeReady pc %s channel %s",this._pcReady,this._channelReady),this._connected||this._connecting||!this._pcReady||!this._channelReady)return;this._connecting=!0;const e=()=>{this.destroyed||this.getStats((t,n)=>{if(this.destroyed)return;t&&(n=[]);var r={},o={},i={},d=!1;n.forEach(e=>{("remotecandidate"===e.type||"remote-candidate"===e.type)&&(r[e.id]=e),("localcandidate"===e.type||"local-candidate"===e.type)&&(o[e.id]=e),("candidatepair"===e.type||"candidate-pair"===e.type)&&(i[e.id]=e)});const s=e=>{d=!0;var t=o[e.localCandidateId];t&&(t.ip||t.address)?(this.localAddress=t.ip||t.address,this.localPort=+t.port):t&&t.ipAddress?(this.localAddress=t.ipAddress,this.localPort=+t.portNumber):"string"==typeof e.googLocalAddress&&(t=e.googLocalAddress.split(":"),this.localAddress=t[0],this.localPort=+t[1]),this.localAddress&&(this.localFamily=this.localAddress.includes(":")?"IPv6":"IPv4");var n=r[e.remoteCandidateId];n&&(n.ip||n.address)?(this.remoteAddress=n.ip||n.address,this.remotePort=+n.port):n&&n.ipAddress?(this.remoteAddress=n.ipAddress,this.remotePort=+n.portNumber):"string"==typeof e.googRemoteAddress&&(n=e.googRemoteAddress.split(":"),this.remoteAddress=n[0],this.remotePort=+n[1]),this.remoteAddress&&(this.remoteFamily=this.remoteAddress.includes(":")?"IPv6":"IPv4"),this._debug("connect local: %s:%s remote: %s:%s",this.localAddress,this.localPort,this.remoteAddress,this.remotePort)};if(n.forEach(e=>{"transport"===e.type&&e.selectedCandidatePairId&&s(i[e.selectedCandidatePairId]),("googCandidatePair"===e.type&&"true"===e.googActiveConnection||("candidatepair"===e.type||"candidate-pair"===e.type)&&e.selected)&&s(e)}),!d&&(!Object.keys(i).length||Object.keys(o).length))return void setTimeout(e,100);if(this._connecting=!1,this._connected=!0,this._chunk){try{this.send(this._chunk)}catch(e){return this.destroy(a(e,"ERR_DATA_CHANNEL"))}this._chunk=null,this._debug("sent chunk from \"write before connect\"");var l=this._cb;this._cb=null,l(null)}"number"!=typeof this._channel.bufferedAmountLowThreshold&&(this._interval=setInterval(()=>this._onInterval(),150),this._interval.unref&&this._interval.unref()),this._debug("connect"),this.emit("connect")})};e()}_onInterval(){this._cb&&this._channel&&!(this._channel.bufferedAmount>u)&&this._onChannelBufferedAmountLow()}_onSignalingStateChange(){this.destroyed||("stable"===this._pc.signalingState&&!this._firstStable&&(this._isNegotiating=!1,this._debug("flushing sender queue",this._sendersAwaitingStable),this._sendersAwaitingStable.forEach(e=>{this._pc.removeTrack(e),this._queuedNegotiation=!0}),this._sendersAwaitingStable=[],this._queuedNegotiation&&(this._debug("flushing negotiation queue"),this._queuedNegotiation=!1,this._needsNegotiation()),this._debug("negotiate"),this.emit("negotiate")),this._firstStable=!1,this._debug("signalingStateChange %s",this._pc.signalingState),this.emit("signalingStateChange",this._pc.signalingState))}_onIceCandidate(e){this.destroyed||(e.candidate&&this.trickle?this.emit("signal",{candidate:{candidate:e.candidate.candidate,sdpMLineIndex:e.candidate.sdpMLineIndex,sdpMid:e.candidate.sdpMid}}):!e.candidate&&!this._iceComplete&&(this._iceComplete=!0,this.emit("_iceComplete")),e.candidate&&this._startIceCompleteTimeout())}_onChannelMessage(e){if(!this.destroyed){var t=e.data;t instanceof ArrayBuffer&&(t=n.from(t)),this.push(t)}}_onChannelBufferedAmountLow(){if(!this.destroyed&&this._cb){this._debug("ending backpressure: bufferedAmount %d",this._channel.bufferedAmount);var e=this._cb;this._cb=null,e(null)}}_onChannelOpen(){this._connected||this.destroyed||(this._debug("on channel open"),this._channelReady=!0,this._maybeReady())}_onChannelClose(){this.destroyed||(this._debug("on channel close"),this.destroy())}_onTrack(e){this.destroyed||e.streams.forEach(t=>{this._debug("on track"),this.emit("track",e.track,t),this._remoteTracks.push({track:e.track,stream:t}),this._remoteStreams.some(e=>e.id===t.id)||(this._remoteStreams.push(t),c(()=>{this.emit("stream",t)}))})}_debug(){var e=[].slice.call(arguments);e[0]="["+this._id+"] "+e[0],i.apply(null,e)}}p.WEBRTC_SUPPORT=!!d(),p.config={iceServers:[{urls:"stun:stun.l.google.com:19302"},{urls:"stun:global.stun.twilio.com:3478?transport=udp"}],sdpSemantics:"unified-plan"},p.channelConfig={},t.exports=p}).call(this,e("buffer").Buffer)},{buffer:3,debug:4,"get-browser-rtc":7,"queue-microtask":12,randombytes:13,"readable-stream":28}]},{},[])("/")});