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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
dictionary WebTransportHash {
DOMString algorithm;
BufferSource value;
dictionary WebTransportOptions {
boolean allowPooling = false;
boolean requireUnreliable = false;
sequence<WebTransportHash> serverCertificateHashes;
WebTransportCongestionControl congestionControl = "default";
enum WebTransportCongestionControl {
dictionary WebTransportCloseInfo {
unsigned long closeCode = 0;
UTF8String reason = "";
dictionary WebTransportSendStreamOptions {
long long? sendOrder = null;
dictionary WebTransportStats {
DOMHighResTimeStamp timestamp;
unsigned long long bytesSent;
unsigned long long packetsSent;
unsigned long long packetsLost;
unsigned long numOutgoingStreamsCreated;
unsigned long numIncomingStreamsCreated;
unsigned long long bytesReceived;
unsigned long long packetsReceived;
DOMHighResTimeStamp smoothedRtt;
DOMHighResTimeStamp rttVariation;
DOMHighResTimeStamp minRtt;
WebTransportDatagramStats datagrams;
dictionary WebTransportDatagramStats {
DOMHighResTimeStamp timestamp;
unsigned long long expiredOutgoing;
unsigned long long droppedIncoming;
unsigned long long lostOutgoing;
[Exposed=(Window,Worker), SecureContext, Pref="network.webtransport.enabled"]
interface WebTransport {
constructor(USVString url, optional WebTransportOptions options = {});
Promise<WebTransportStats> getStats();
readonly attribute Promise<undefined> ready;
readonly attribute WebTransportReliabilityMode reliability;
readonly attribute WebTransportCongestionControl congestionControl;
readonly attribute Promise<WebTransportCloseInfo> closed;
[Throws] undefined close(optional WebTransportCloseInfo closeInfo = {});
[Throws] readonly attribute WebTransportDatagramDuplexStream datagrams;
Promise<WebTransportBidirectionalStream> createBidirectionalStream(
optional WebTransportSendStreamOptions options = {});
/* a ReadableStream of WebTransportBidirectionalStream objects */
readonly attribute ReadableStream incomingBidirectionalStreams;
/* XXX spec says this should be WebTransportSendStream */
Promise<WritableStream> createUnidirectionalStream(
optional WebTransportSendStreamOptions options = {});
/* a ReadableStream of WebTransportReceiveStream objects */
readonly attribute ReadableStream incomingUnidirectionalStreams;
enum WebTransportReliabilityMode {