openpgp/dist/openpgp.min.mjs.map

OpenPGP.js is a Javascript implementation of the OpenPGP protocol. This is defined in RFC 4880.

{"version":3,"file":"openpgp.min.mjs","sources":["../node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs","../node_modules/@mattiasbuelens/web-streams-adapter/dist/web-streams-adapter.mjs","../node_modules/@openpgp/web-stream-tools/lib/util.js","../node_modules/@openpgp/web-stream-tools/lib/node-conversions.js","../node_modules/@openpgp/web-stream-tools/lib/reader.js","../node_modules/@openpgp/web-stream-tools/lib/streams.js","../src/biginteger/native.interface.js","../src/util.js","../src/biginteger/index.js","../src/encoding/base64.js","../src/enums.js","../src/config/config.js","../src/encoding/armor.js","../src/type/keyid.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/aes/aes.asm.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/other/utils.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/other/errors.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/aes/aes.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/aes/ecb.js","../src/crypto/cipher/aes.js","../src/crypto/cipher/des.js","../src/crypto/cipher/cast5.js","../src/crypto/cipher/twofish.js","../src/crypto/cipher/blowfish.js","../src/crypto/cipher/index.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/hash/sha1/sha1.asm.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/hash/hash.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/hash/sha1/sha1.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/hash/sha256/sha256.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/hash/sha256/sha256.asm.js","../node_modules/minimalistic-assert/index.js","../node_modules/inherits/inherits_browser.js","../node_modules/hash.js/lib/hash/utils.js","../node_modules/hash.js/lib/hash/common.js","../node_modules/hash.js/lib/hash/sha/common.js","../node_modules/hash.js/lib/hash/sha/256.js","../node_modules/hash.js/lib/hash/sha/224.js","../node_modules/hash.js/lib/hash/sha/512.js","../node_modules/hash.js/lib/hash/sha/384.js","../node_modules/hash.js/lib/hash/ripemd.js","../src/crypto/hash/md5.js","../src/crypto/hash/index.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/aes/cfb.js","../src/crypto/cfb.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/aes/gcm.js","../src/crypto/gcm.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/aes/ctr.js","../node_modules/@openpgp/asmcrypto.js/dist_es8/aes/cbc.js","../src/crypto/cmac.js","../src/crypto/eax.js","../src/crypto/ocb.js","../node_modules/@openpgp/tweetnacl/nacl-fast-light.js","../src/crypto/random.js","../src/crypto/public_key/prime.js","../src/crypto/pkcs1.js","../src/crypto/public_key/rsa.js","../src/crypto/public_key/elgamal.js","../src/type/oid.js","../src/crypto/public_key/elliptic/indutnyKey.js","../src/crypto/public_key/elliptic/curves.js","../src/crypto/public_key/elliptic/ecdsa.js","../src/crypto/public_key/elliptic/eddsa.js","../src/crypto/aes_kw.js","../src/crypto/pkcs5.js","../src/crypto/public_key/elliptic/ecdh.js","../src/crypto/public_key/index.js","../src/crypto/public_key/dsa.js","../src/crypto/signature.js","../src/type/ecdh_symkey.js","../src/type/kdf_params.js","../src/crypto/crypto.js","../src/crypto/index.js","../node_modules/@openpgp/pako/lib/utils/common.js","../node_modules/@openpgp/pako/lib/zlib/trees.js","../node_modules/@openpgp/pako/lib/zlib/constants.js","../node_modules/@openpgp/pako/lib/zlib/adler32.js","../node_modules/@openpgp/pako/lib/zlib/crc32.js","../node_modules/@openpgp/pako/lib/zlib/messages.js","../node_modules/@openpgp/pako/lib/zlib/deflate.js","../node_modules/@openpgp/pako/lib/utils/strings.js","../node_modules/@openpgp/pako/lib/zlib/zstream.js","../node_modules/@openpgp/pako/lib/deflate.js","../node_modules/@openpgp/pako/lib/zlib/inffast.js","../node_modules/@openpgp/pako/lib/zlib/inftrees.js","../node_modules/@openpgp/pako/lib/zlib/inflate.js","../node_modules/@openpgp/pako/lib/zlib/gzheader.js","../node_modules/@openpgp/pako/lib/inflate.js","../node_modules/@openpgp/seek-bzip/lib/bitreader.js","../node_modules/@openpgp/seek-bzip/lib/stream.js","../node_modules/@openpgp/seek-bzip/lib/crc32.js","../node_modules/@openpgp/seek-bzip/lib/index.js","../src/packet/compressed_data.js","../src/packet/sym_encrypted_integrity_protected_data.js","../src/packet/aead_encrypted_data.js","../src/packet/public_key_encrypted_session_key.js","../src/type/s2k.js","../src/packet/sym_encrypted_session_key.js","../src/packet/literal_data.js","../src/packet/public_key.js","../src/packet/symmetrically_encrypted_data.js","../src/packet/marker.js","../src/packet/public_subkey.js","../src/packet/packet.js","../src/packet/user_attribute.js","../src/packet/signature.js","../src/packet/one_pass_signature.js","../src/packet/secret_key.js","../node_modules/email-addresses/lib/email-addresses.js","../src/packet/userid.js","../src/packet/secret_subkey.js","../src/packet/trust.js","../src/packet/all_packets.js","../src/packet/packetlist.js","../src/signature.js","../src/key/helper.js","../src/key/user.js","../src/key/subkey.js","../src/key/key.js","../src/key/factory.js","../src/message.js","../src/cleartext.js","../src/openpgp.js","../node_modules/bn.js/lib/bn.js","../src/biginteger/bn.interface.js","../node_modules/brorand/index.js","../node_modules/minimalistic-crypto-utils/lib/utils.js","../node_modules/@openpgp/elliptic/lib/elliptic/utils.js","../node_modules/@openpgp/elliptic/lib/elliptic/curve/base.js","../node_modules/@openpgp/elliptic/lib/elliptic/curve/short.js","../node_modules/@openpgp/elliptic/lib/elliptic/curve/mont.js","../node_modules/@openpgp/elliptic/lib/elliptic/curve/edwards.js","../node_modules/@openpgp/elliptic/lib/elliptic/curve/index.js","../node_modules/hash.js/lib/hash/sha/1.js","../node_modules/hash.js/lib/hash/sha.js","../node_modules/hash.js/lib/hash/hmac.js","../node_modules/hash.js/lib/hash.js","../node_modules/@openpgp/elliptic/lib/elliptic/precomputed/secp256k1.js","../node_modules/@openpgp/elliptic/lib/elliptic/curves.js","../node_modules/hmac-drbg/lib/hmac-drbg.js","../node_modules/@openpgp/elliptic/lib/elliptic/ec/key.js","../node_modules/@openpgp/elliptic/lib/elliptic/ec/signature.js","../node_modules/@openpgp/elliptic/lib/elliptic/ec/index.js","../node_modules/@openpgp/elliptic/lib/elliptic/eddsa/key.js","../node_modules/@openpgp/elliptic/lib/elliptic/eddsa/signature.js","../node_modules/@openpgp/elliptic/lib/elliptic/eddsa/index.js","../node_modules/@openpgp/elliptic/lib/elliptic.js"],"sourcesContent":["/**\n * web-streams-polyfill v2.1.1\n */\n/// <reference lib=\"es2015.symbol\" />\nconst SymbolPolyfill = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ?\n    Symbol :\n    description => `Symbol(${description})`;\n\n/// <reference lib=\"dom\" />\nfunction noop() {\n    // do nothing\n}\n\n/// <reference lib=\"es2015.core\" />\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN = Number.isNaN || function (x) {\n    // eslint-disable-next-line no-self-compare\n    return x !== x;\n};\n\nconst rethrowAssertionErrorRejection =  noop;\n\nfunction typeIsObject(x) {\n    return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\nfunction createArrayFromList(elements) {\n    // We use arrays to represent lists, so this is basically a no-op.\n    // Do a slice though just in case we happen to depend on the unique-ness.\n    return elements.slice();\n}\nfunction ArrayBufferCopy(dest, destOffset, src, srcOffset, n) {\n    new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\nfunction IsFiniteNonNegativeNumber(v) {\n    if (IsNonNegativeNumber(v) === false) {\n        return false;\n    }\n    if (v === Infinity) {\n        return false;\n    }\n    return true;\n}\nfunction IsNonNegativeNumber(v) {\n    if (typeof v !== 'number') {\n        return false;\n    }\n    if (NumberIsNaN(v)) {\n        return false;\n    }\n    if (v < 0) {\n        return false;\n    }\n    return true;\n}\nfunction Call(F, V, args) {\n    if (typeof F !== 'function') {\n        throw new TypeError('Argument is not a function');\n    }\n    return Function.prototype.apply.call(F, V, args);\n}\nfunction CreateAlgorithmFromUnderlyingMethod(underlyingObject, methodName, algoArgCount, extraArgs) {\n    const method = underlyingObject[methodName];\n    if (method !== undefined) {\n        if (typeof method !== 'function') {\n            throw new TypeError(`${method} is not a method`);\n        }\n        switch (algoArgCount) {\n            case 0: {\n                return () => {\n                    return PromiseCall(method, underlyingObject, extraArgs);\n                };\n            }\n            case 1: {\n                return arg => {\n                    const fullArgs = [arg].concat(extraArgs);\n                    return PromiseCall(method, underlyingObject, fullArgs);\n                };\n            }\n        }\n    }\n    return () => promiseResolvedWith(undefined);\n}\nfunction InvokeOrNoop(O, P, args) {\n    const method = O[P];\n    if (method === undefined) {\n        return undefined;\n    }\n    return Call(method, O, args);\n}\nfunction PromiseCall(F, V, args) {\n    try {\n        return promiseResolvedWith(Call(F, V, args));\n    }\n    catch (value) {\n        return promiseRejectedWith(value);\n    }\n}\n// Not implemented correctly\nfunction TransferArrayBuffer(O) {\n    return O;\n}\n// Not implemented correctly\nfunction IsDetachedBuffer(O) {\n    return false;\n}\nfunction ValidateAndNormalizeHighWaterMark(highWaterMark) {\n    highWaterMark = Number(highWaterMark);\n    if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n        throw new RangeError('highWaterMark property of a queuing strategy must be non-negative and non-NaN');\n    }\n    return highWaterMark;\n}\nfunction MakeSizeAlgorithmFromSizeFunction(size) {\n    if (size === undefined) {\n        return () => 1;\n    }\n    if (typeof size !== 'function') {\n        throw new TypeError('size property of a queuing strategy must be a function');\n    }\n    return chunk => size(chunk);\n}\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseResolve = Promise.resolve.bind(originalPromise);\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\nfunction newPromise(executor) {\n    return new originalPromise(executor);\n}\nfunction promiseResolvedWith(value) {\n    return originalPromiseResolve(value);\n}\nfunction promiseRejectedWith(reason) {\n    return originalPromiseReject(reason);\n}\nfunction PerformPromiseThen(promise, onFulfilled, onRejected) {\n    // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n    // approximation.\n    return originalPromiseThen.call(promise, onFulfilled, onRejected);\n}\nfunction uponPromise(promise, onFulfilled, onRejected) {\n    PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection);\n}\nfunction uponFulfillment(promise, onFulfilled) {\n    uponPromise(promise, onFulfilled);\n}\nfunction uponRejection(promise, onRejected) {\n    uponPromise(promise, undefined, onRejected);\n}\nfunction transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) {\n    return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\nfunction setPromiseIsHandledToTrue(promise) {\n    PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nclass SimpleQueue {\n    constructor() {\n        this._cursor = 0;\n        this._size = 0;\n        // _front and _back are always defined.\n        this._front = {\n            _elements: [],\n            _next: undefined\n        };\n        this._back = this._front;\n        // The cursor is used to avoid calling Array.shift().\n        // It contains the index of the front element of the array inside the\n        // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n        this._cursor = 0;\n        // When there is only one node, size === elements.length - cursor.\n        this._size = 0;\n    }\n    get length() {\n        return this._size;\n    }\n    // For exception safety, this method is structured in order:\n    // 1. Read state\n    // 2. Calculate required state mutations\n    // 3. Perform state mutations\n    push(element) {\n        const oldBack = this._back;\n        let newBack = oldBack;\n        if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n            newBack = {\n                _elements: [],\n                _next: undefined\n            };\n        }\n        // push() is the mutation most likely to throw an exception, so it\n        // goes first.\n        oldBack._elements.push(element);\n        if (newBack !== oldBack) {\n            this._back = newBack;\n            oldBack._next = newBack;\n        }\n        ++this._size;\n    }\n    // Like push(), shift() follows the read -> calculate -> mutate pattern for\n    // exception safety.\n    shift() { // must not be called on an empty queue\n        const oldFront = this._front;\n        let newFront = oldFront;\n        const oldCursor = this._cursor;\n        let newCursor = oldCursor + 1;\n        const elements = oldFront._elements;\n        const element = elements[oldCursor];\n        if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n            newFront = oldFront._next;\n            newCursor = 0;\n        }\n        // No mutations before this point.\n        --this._size;\n        this._cursor = newCursor;\n        if (oldFront !== newFront) {\n            this._front = newFront;\n        }\n        // Permit shifted element to be garbage collected.\n        elements[oldCursor] = undefined;\n        return element;\n    }\n    // The tricky thing about forEach() is that it can be called\n    // re-entrantly. The queue may be mutated inside the callback. It is easy to\n    // see that push() within the callback has no negative effects since the end\n    // of the queue is checked for on every iteration. If shift() is called\n    // repeatedly within the callback then the next iteration may return an\n    // element that has been removed. In this case the callback will be called\n    // with undefined values until we either \"catch up\" with elements that still\n    // exist or reach the back of the queue.\n    forEach(callback) {\n        let i = this._cursor;\n        let node = this._front;\n        let elements = node._elements;\n        while (i !== elements.length || node._next !== undefined) {\n            if (i === elements.length) {\n                node = node._next;\n                elements = node._elements;\n                i = 0;\n                if (elements.length === 0) {\n                    break;\n                }\n            }\n            callback(elements[i]);\n            ++i;\n        }\n    }\n    // Return the element that would be returned if shift() was called now,\n    // without modifying the queue.\n    peek() { // must not be called on an empty queue\n        const front = this._front;\n        const cursor = this._cursor;\n        return front._elements[cursor];\n    }\n}\n\nfunction ReadableStreamCreateReadResult(value, done, forAuthorCode) {\n    let prototype = null;\n    if (forAuthorCode === true) {\n        prototype = Object.prototype;\n    }\n    const obj = Object.create(prototype);\n    obj.value = value;\n    obj.done = done;\n    return obj;\n}\nfunction ReadableStreamReaderGenericInitialize(reader, stream) {\n    reader._forAuthorCode = true;\n    reader._ownerReadableStream = stream;\n    stream._reader = reader;\n    if (stream._state === 'readable') {\n        defaultReaderClosedPromiseInitialize(reader);\n    }\n    else if (stream._state === 'closed') {\n        defaultReaderClosedPromiseInitializeAsResolved(reader);\n    }\n    else {\n        defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n    }\n}\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\nfunction ReadableStreamReaderGenericCancel(reader, reason) {\n    const stream = reader._ownerReadableStream;\n    return ReadableStreamCancel(stream, reason);\n}\nfunction ReadableStreamReaderGenericRelease(reader) {\n    if (reader._ownerReadableStream._state === 'readable') {\n        defaultReaderClosedPromiseReject(reader, new TypeError('Reader was released and can no longer be used to monitor the stream\\'s closedness'));\n    }\n    else {\n        defaultReaderClosedPromiseResetToRejected(reader, new TypeError('Reader was released and can no longer be used to monitor the stream\\'s closedness'));\n    }\n    reader._ownerReadableStream._reader = undefined;\n    reader._ownerReadableStream = undefined;\n}\n// Helper functions for the readers.\nfunction readerLockException(name) {\n    return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n// Helper functions for the ReadableStreamDefaultReader.\nfunction defaultReaderClosedPromiseInitialize(reader) {\n    reader._closedPromise = newPromise((resolve, reject) => {\n        reader._closedPromise_resolve = resolve;\n        reader._closedPromise_reject = reject;\n    });\n}\nfunction defaultReaderClosedPromiseInitializeAsRejected(reader, reason) {\n    defaultReaderClosedPromiseInitialize(reader);\n    defaultReaderClosedPromiseReject(reader, reason);\n}\nfunction defaultReaderClosedPromiseInitializeAsResolved(reader) {\n    defaultReaderClosedPromiseInitialize(reader);\n    defaultReaderClosedPromiseResolve(reader);\n}\nfunction defaultReaderClosedPromiseReject(reader, reason) {\n    setPromiseIsHandledToTrue(reader._closedPromise);\n    reader._closedPromise_reject(reason);\n    reader._closedPromise_resolve = undefined;\n    reader._closedPromise_reject = undefined;\n}\nfunction defaultReaderClosedPromiseResetToRejected(reader, reason) {\n    defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\nfunction defaultReaderClosedPromiseResolve(reader) {\n    reader._closedPromise_resolve(undefined);\n    reader._closedPromise_resolve = undefined;\n    reader._closedPromise_reject = undefined;\n}\n\nconst CancelSteps = SymbolPolyfill('[[CancelSteps]]');\nconst PullSteps = SymbolPolyfill('[[PullSteps]]');\n\n// Abstract operations for the ReadableStream.\nfunction AcquireReadableStreamDefaultReader(stream, forAuthorCode = false) {\n    const reader = new ReadableStreamDefaultReader(stream);\n    reader._forAuthorCode = forAuthorCode;\n    return reader;\n}\n// ReadableStream API exposed for controllers.\nfunction ReadableStreamAddReadRequest(stream) {\n    const promise = newPromise((resolve, reject) => {\n        const readRequest = {\n            _resolve: resolve,\n            _reject: reject\n        };\n        stream._reader._readRequests.push(readRequest);\n    });\n    return promise;\n}\nfunction ReadableStreamFulfillReadRequest(stream, chunk, done) {\n    const reader = stream._reader;\n    const readRequest = reader._readRequests.shift();\n    readRequest._resolve(ReadableStreamCreateReadResult(chunk, done, reader._forAuthorCode));\n}\nfunction ReadableStreamGetNumReadRequests(stream) {\n    return stream._reader._readRequests.length;\n}\nfunction ReadableStreamHasDefaultReader(stream) {\n    const reader = stream._reader;\n    if (reader === undefined) {\n        return false;\n    }\n    if (!IsReadableStreamDefaultReader(reader)) {\n        return false;\n    }\n    return true;\n}\nclass ReadableStreamDefaultReader {\n    constructor(stream) {\n        if (IsReadableStream(stream) === false) {\n            throw new TypeError('ReadableStreamDefaultReader can only be constructed with a ReadableStream instance');\n        }\n        if (IsReadableStreamLocked(stream) === true) {\n            throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n        }\n        ReadableStreamReaderGenericInitialize(this, stream);\n        this._readRequests = new SimpleQueue();\n    }\n    get closed() {\n        if (!IsReadableStreamDefaultReader(this)) {\n            return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n        }\n        return this._closedPromise;\n    }\n    cancel(reason) {\n        if (!IsReadableStreamDefaultReader(this)) {\n            return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n        }\n        if (this._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('cancel'));\n        }\n        return ReadableStreamReaderGenericCancel(this, reason);\n    }\n    read() {\n        if (!IsReadableStreamDefaultReader(this)) {\n            return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n        }\n        if (this._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('read from'));\n        }\n        return ReadableStreamDefaultReaderRead(this);\n    }\n    releaseLock() {\n        if (!IsReadableStreamDefaultReader(this)) {\n            throw defaultReaderBrandCheckException('releaseLock');\n        }\n        if (this._ownerReadableStream === undefined) {\n            return;\n        }\n        if (this._readRequests.length > 0) {\n            throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');\n        }\n        ReadableStreamReaderGenericRelease(this);\n    }\n}\n// Abstract operations for the readers.\nfunction IsReadableStreamDefaultReader(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n        return false;\n    }\n    return true;\n}\nfunction ReadableStreamDefaultReaderRead(reader) {\n    const stream = reader._ownerReadableStream;\n    stream._disturbed = true;\n    if (stream._state === 'closed') {\n        return promiseResolvedWith(ReadableStreamCreateReadResult(undefined, true, reader._forAuthorCode));\n    }\n    if (stream._state === 'errored') {\n        return promiseRejectedWith(stream._storedError);\n    }\n    return stream._readableStreamController[PullSteps]();\n}\n// Helper functions for the ReadableStreamDefaultReader.\nfunction defaultReaderBrandCheckException(name) {\n    return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n\n/// <reference lib=\"es2018.asynciterable\" />\nlet AsyncIteratorPrototype;\nif (typeof SymbolPolyfill.asyncIterator === 'symbol') {\n    // We're running inside a ES2018+ environment, but we're compiling to an older syntax.\n    // We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\n    AsyncIteratorPrototype = {\n        // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n        // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n        [SymbolPolyfill.asyncIterator]() {\n            return this;\n        }\n    };\n    Object.defineProperty(AsyncIteratorPrototype, SymbolPolyfill.asyncIterator, { enumerable: false });\n}\n\n/// <reference lib=\"es2018.asynciterable\" />\nconst ReadableStreamAsyncIteratorPrototype = {\n    next() {\n        if (IsReadableStreamAsyncIterator(this) === false) {\n            return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n        }\n        const reader = this._asyncIteratorReader;\n        if (reader._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('iterate'));\n        }\n        return transformPromiseWith(ReadableStreamDefaultReaderRead(reader), result => {\n            const done = result.done;\n            if (done) {\n                ReadableStreamReaderGenericRelease(reader);\n            }\n            const value = result.value;\n            return ReadableStreamCreateReadResult(value, done, true);\n        });\n    },\n    return(value) {\n        if (IsReadableStreamAsyncIterator(this) === false) {\n            return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n        }\n        const reader = this._asyncIteratorReader;\n        if (reader._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('finish iterating'));\n        }\n        if (reader._readRequests.length > 0) {\n            return promiseRejectedWith(new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled'));\n        }\n        if (this._preventCancel === false) {\n            const result = ReadableStreamReaderGenericCancel(reader, value);\n            ReadableStreamReaderGenericRelease(reader);\n            return transformPromiseWith(result, () => ReadableStreamCreateReadResult(value, true, true));\n        }\n        ReadableStreamReaderGenericRelease(reader);\n        return promiseResolvedWith(ReadableStreamCreateReadResult(value, true, true));\n    }\n};\nif (AsyncIteratorPrototype !== undefined) {\n    Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n}\nObject.defineProperty(ReadableStreamAsyncIteratorPrototype, 'next', { enumerable: false });\nObject.defineProperty(ReadableStreamAsyncIteratorPrototype, 'return', { enumerable: false });\n// Abstract operations for the ReadableStream.\nfunction AcquireReadableStreamAsyncIterator(stream, preventCancel = false) {\n    const reader = AcquireReadableStreamDefaultReader(stream);\n    const iterator = Object.create(ReadableStreamAsyncIteratorPrototype);\n    iterator._asyncIteratorReader = reader;\n    iterator._preventCancel = Boolean(preventCancel);\n    return iterator;\n}\nfunction IsReadableStreamAsyncIterator(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorReader')) {\n        return false;\n    }\n    return true;\n}\n// Helper functions for the ReadableStream.\nfunction streamAsyncIteratorBrandCheckException(name) {\n    return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n\nfunction DequeueValue(container) {\n    const pair = container._queue.shift();\n    container._queueTotalSize -= pair.size;\n    if (container._queueTotalSize < 0) {\n        container._queueTotalSize = 0;\n    }\n    return pair.value;\n}\nfunction EnqueueValueWithSize(container, value, size) {\n    size = Number(size);\n    if (!IsFiniteNonNegativeNumber(size)) {\n        throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n    }\n    container._queue.push({ value, size });\n    container._queueTotalSize += size;\n}\nfunction PeekQueueValue(container) {\n    const pair = container._queue.peek();\n    return pair.value;\n}\nfunction ResetQueue(container) {\n    container._queue = new SimpleQueue();\n    container._queueTotalSize = 0;\n}\n\nconst AbortSteps = SymbolPolyfill('[[AbortSteps]]');\nconst ErrorSteps = SymbolPolyfill('[[ErrorSteps]]');\nclass WritableStream {\n    constructor(underlyingSink = {}, strategy = {}) {\n        InitializeWritableStream(this);\n        const size = strategy.size;\n        let highWaterMark = strategy.highWaterMark;\n        const type = underlyingSink.type;\n        if (type !== undefined) {\n            throw new RangeError('Invalid type is specified');\n        }\n        const sizeAlgorithm = MakeSizeAlgorithmFromSizeFunction(size);\n        if (highWaterMark === undefined) {\n            highWaterMark = 1;\n        }\n        highWaterMark = ValidateAndNormalizeHighWaterMark(highWaterMark);\n        SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n    }\n    get locked() {\n        if (IsWritableStream(this) === false) {\n            throw streamBrandCheckException('locked');\n        }\n        return IsWritableStreamLocked(this);\n    }\n    abort(reason) {\n        if (IsWritableStream(this) === false) {\n            return promiseRejectedWith(streamBrandCheckException('abort'));\n        }\n        if (IsWritableStreamLocked(this) === true) {\n            return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n        }\n        return WritableStreamAbort(this, reason);\n    }\n    close() {\n        if (IsWritableStream(this) === false) {\n            return promiseRejectedWith(streamBrandCheckException('close'));\n        }\n        if (IsWritableStreamLocked(this) === true) {\n            return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n        }\n        if (WritableStreamCloseQueuedOrInFlight(this) === true) {\n            return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n        }\n        return WritableStreamClose(this);\n    }\n    getWriter() {\n        if (IsWritableStream(this) === false) {\n            throw streamBrandCheckException('getWriter');\n        }\n        return AcquireWritableStreamDefaultWriter(this);\n    }\n}\n// Abstract operations for the WritableStream.\nfunction AcquireWritableStreamDefaultWriter(stream) {\n    return new WritableStreamDefaultWriter(stream);\n}\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {\n    const stream = Object.create(WritableStream.prototype);\n    InitializeWritableStream(stream);\n    const controller = Object.create(WritableStreamDefaultController.prototype);\n    SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);\n    return stream;\n}\nfunction InitializeWritableStream(stream) {\n    stream._state = 'writable';\n    // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n    // 'erroring' or 'errored'. May be set to an undefined value.\n    stream._storedError = undefined;\n    stream._writer = undefined;\n    // Initialize to undefined first because the constructor of the controller checks this\n    // variable to validate the caller.\n    stream._writableStreamController = undefined;\n    // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n    // producer without waiting for the queued writes to finish.\n    stream._writeRequests = new SimpleQueue();\n    // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n    // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n    stream._inFlightWriteRequest = undefined;\n    // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n    // has been detached.\n    stream._closeRequest = undefined;\n    // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n    // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n    stream._inFlightCloseRequest = undefined;\n    // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n    stream._pendingAbortRequest = undefined;\n    // The backpressure signal set by the controller.\n    stream._backpressure = false;\n}\nfunction IsWritableStream(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n        return false;\n    }\n    return true;\n}\nfunction IsWritableStreamLocked(stream) {\n    if (stream._writer === undefined) {\n        return false;\n    }\n    return true;\n}\nfunction WritableStreamAbort(stream, reason) {\n    const state = stream._state;\n    if (state === 'closed' || state === 'errored') {\n        return promiseResolvedWith(undefined);\n    }\n    if (stream._pendingAbortRequest !== undefined) {\n        return stream._pendingAbortRequest._promise;\n    }\n    let wasAlreadyErroring = false;\n    if (state === 'erroring') {\n        wasAlreadyErroring = true;\n        // reason will not be used, so don't keep a reference to it.\n        reason = undefined;\n    }\n    const promise = newPromise((resolve, reject) => {\n        stream._pendingAbortRequest = {\n            _promise: undefined,\n            _resolve: resolve,\n            _reject: reject,\n            _reason: reason,\n            _wasAlreadyErroring: wasAlreadyErroring\n        };\n    });\n    stream._pendingAbortRequest._promise = promise;\n    if (wasAlreadyErroring === false) {\n        WritableStreamStartErroring(stream, reason);\n    }\n    return promise;\n}\nfunction WritableStreamClose(stream) {\n    const state = stream._state;\n    if (state === 'closed' || state === 'errored') {\n        return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`));\n    }\n    const promise = newPromise((resolve, reject) => {\n        const closeRequest = {\n            _resolve: resolve,\n            _reject: reject\n        };\n        stream._closeRequest = closeRequest;\n    });\n    const writer = stream._writer;\n    if (writer !== undefined && stream._backpressure === true && state === 'writable') {\n        defaultWriterReadyPromiseResolve(writer);\n    }\n    WritableStreamDefaultControllerClose(stream._writableStreamController);\n    return promise;\n}\n// WritableStream API exposed for controllers.\nfunction WritableStreamAddWriteRequest(stream) {\n    const promise = newPromise((resolve, reject) => {\n        const writeRequest = {\n            _resolve: resolve,\n            _reject: reject\n        };\n        stream._writeRequests.push(writeRequest);\n    });\n    return promise;\n}\nfunction WritableStreamDealWithRejection(stream, error) {\n    const state = stream._state;\n    if (state === 'writable') {\n        WritableStreamStartErroring(stream, error);\n        return;\n    }\n    WritableStreamFinishErroring(stream);\n}\nfunction WritableStreamStartErroring(stream, reason) {\n    const controller = stream._writableStreamController;\n    stream._state = 'erroring';\n    stream._storedError = reason;\n    const writer = stream._writer;\n    if (writer !== undefined) {\n        WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n    }\n    if (WritableStreamHasOperationMarkedInFlight(stream) === false && controller._started === true) {\n        WritableStreamFinishErroring(stream);\n    }\n}\nfunction WritableStreamFinishErroring(stream) {\n    stream._state = 'errored';\n    stream._writableStreamController[ErrorSteps]();\n    const storedError = stream._storedError;\n    stream._writeRequests.forEach(writeRequest => {\n        writeRequest._reject(storedError);\n    });\n    stream._writeRequests = new SimpleQueue();\n    if (stream._pendingAbortRequest === undefined) {\n        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n        return;\n    }\n    const abortRequest = stream._pendingAbortRequest;\n    stream._pendingAbortRequest = undefined;\n    if (abortRequest._wasAlreadyErroring === true) {\n        abortRequest._reject(storedError);\n        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n        return;\n    }\n    const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n    uponPromise(promise, () => {\n        abortRequest._resolve();\n        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n    }, (reason) => {\n        abortRequest._reject(reason);\n        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n    });\n}\nfunction WritableStreamFinishInFlightWrite(stream) {\n    stream._inFlightWriteRequest._resolve(undefined);\n    stream._inFlightWriteRequest = undefined;\n}\nfunction WritableStreamFinishInFlightWriteWithError(stream, error) {\n    stream._inFlightWriteRequest._reject(error);\n    stream._inFlightWriteRequest = undefined;\n    WritableStreamDealWithRejection(stream, error);\n}\nfunction WritableStreamFinishInFlightClose(stream) {\n    stream._inFlightCloseRequest._resolve(undefined);\n    stream._inFlightCloseRequest = undefined;\n    const state = stream._state;\n    if (state === 'erroring') {\n        // The error was too late to do anything, so it is ignored.\n        stream._storedError = undefined;\n        if (stream._pendingAbortRequest !== undefined) {\n            stream._pendingAbortRequest._resolve();\n            stream._pendingAbortRequest = undefined;\n        }\n    }\n    stream._state = 'closed';\n    const writer = stream._writer;\n    if (writer !== undefined) {\n        defaultWriterClosedPromiseResolve(writer);\n    }\n}\nfunction WritableStreamFinishInFlightCloseWithError(stream, error) {\n    stream._inFlightCloseRequest._reject(error);\n    stream._inFlightCloseRequest = undefined;\n    // Never execute sink abort() after sink close().\n    if (stream._pendingAbortRequest !== undefined) {\n        stream._pendingAbortRequest._reject(error);\n        stream._pendingAbortRequest = undefined;\n    }\n    WritableStreamDealWithRejection(stream, error);\n}\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream) {\n    if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n        return false;\n    }\n    return true;\n}\nfunction WritableStreamHasOperationMarkedInFlight(stream) {\n    if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n        return false;\n    }\n    return true;\n}\nfunction WritableStreamMarkCloseRequestInFlight(stream) {\n    stream._inFlightCloseRequest = stream._closeRequest;\n    stream._closeRequest = undefined;\n}\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream) {\n    stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) {\n    if (stream._closeRequest !== undefined) {\n        stream._closeRequest._reject(stream._storedError);\n        stream._closeRequest = undefined;\n    }\n    const writer = stream._writer;\n    if (writer !== undefined) {\n        defaultWriterClosedPromiseReject(writer, stream._storedError);\n    }\n}\nfunction WritableStreamUpdateBackpressure(stream, backpressure) {\n    const writer = stream._writer;\n    if (writer !== undefined && backpressure !== stream._backpressure) {\n        if (backpressure === true) {\n            defaultWriterReadyPromiseReset(writer);\n        }\n        else {\n            defaultWriterReadyPromiseResolve(writer);\n        }\n    }\n    stream._backpressure = backpressure;\n}\nclass WritableStreamDefaultWriter {\n    constructor(stream) {\n        if (IsWritableStream(stream) === false) {\n            throw new TypeError('WritableStreamDefaultWriter can only be constructed with a WritableStream instance');\n        }\n        if (IsWritableStreamLocked(stream) === true) {\n            throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n        }\n        this._ownerWritableStream = stream;\n        stream._writer = this;\n        const state = stream._state;\n        if (state === 'writable') {\n            if (WritableStreamCloseQueuedOrInFlight(stream) === false && stream._backpressure === true) {\n                defaultWriterReadyPromiseInitialize(this);\n            }\n            else {\n                defaultWriterReadyPromiseInitializeAsResolved(this);\n            }\n            defaultWriterClosedPromiseInitialize(this);\n        }\n        else if (state === 'erroring') {\n            defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n            defaultWriterClosedPromiseInitialize(this);\n        }\n        else if (state === 'closed') {\n            defaultWriterReadyPromiseInitializeAsResolved(this);\n            defaultWriterClosedPromiseInitializeAsResolved(this);\n        }\n        else {\n            const storedError = stream._storedError;\n            defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n            defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n        }\n    }\n    get closed() {\n        if (IsWritableStreamDefaultWriter(this) === false) {\n            return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n        }\n        return this._closedPromise;\n    }\n    get desiredSize() {\n        if (IsWritableStreamDefaultWriter(this) === false) {\n            throw defaultWriterBrandCheckException('desiredSize');\n        }\n        if (this._ownerWritableStream === undefined) {\n            throw defaultWriterLockException('desiredSize');\n        }\n        return WritableStreamDefaultWriterGetDesiredSize(this);\n    }\n    get ready() {\n        if (IsWritableStreamDefaultWriter(this) === false) {\n            return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n        }\n        return this._readyPromise;\n    }\n    abort(reason) {\n        if (IsWritableStreamDefaultWriter(this) === false) {\n            return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n        }\n        if (this._ownerWritableStream === undefined) {\n            return promiseRejectedWith(defaultWriterLockException('abort'));\n        }\n        return WritableStreamDefaultWriterAbort(this, reason);\n    }\n    close() {\n        if (IsWritableStreamDefaultWriter(this) === false) {\n            return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n        }\n        const stream = this._ownerWritableStream;\n        if (stream === undefined) {\n            return promiseRejectedWith(defaultWriterLockException('close'));\n        }\n        if (WritableStreamCloseQueuedOrInFlight(stream) === true) {\n            return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n        }\n        return WritableStreamDefaultWriterClose(this);\n    }\n    releaseLock() {\n        if (IsWritableStreamDefaultWriter(this) === false) {\n            throw defaultWriterBrandCheckException('releaseLock');\n        }\n        const stream = this._ownerWritableStream;\n        if (stream === undefined) {\n            return;\n        }\n        WritableStreamDefaultWriterRelease(this);\n    }\n    write(chunk) {\n        if (IsWritableStreamDefaultWriter(this) === false) {\n            return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n        }\n        if (this._ownerWritableStream === undefined) {\n            return promiseRejectedWith(defaultWriterLockException('write to'));\n        }\n        return WritableStreamDefaultWriterWrite(this, chunk);\n    }\n}\n// Abstract operations for the WritableStreamDefaultWriter.\nfunction IsWritableStreamDefaultWriter(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n        return false;\n    }\n    return true;\n}\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\nfunction WritableStreamDefaultWriterAbort(writer, reason) {\n    const stream = writer._ownerWritableStream;\n    return WritableStreamAbort(stream, reason);\n}\nfunction WritableStreamDefaultWriterClose(writer) {\n    const stream = writer._ownerWritableStream;\n    return WritableStreamClose(stream);\n}\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer) {\n    const stream = writer._ownerWritableStream;\n    const state = stream._state;\n    if (WritableStreamCloseQueuedOrInFlight(stream) === true || state === 'closed') {\n        return promiseResolvedWith(undefined);\n    }\n    if (state === 'errored') {\n        return promiseRejectedWith(stream._storedError);\n    }\n    return WritableStreamDefaultWriterClose(writer);\n}\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) {\n    if (writer._closedPromiseState === 'pending') {\n        defaultWriterClosedPromiseReject(writer, error);\n    }\n    else {\n        defaultWriterClosedPromiseResetToRejected(writer, error);\n    }\n}\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) {\n    if (writer._readyPromiseState === 'pending') {\n        defaultWriterReadyPromiseReject(writer, error);\n    }\n    else {\n        defaultWriterReadyPromiseResetToRejected(writer, error);\n    }\n}\nfunction WritableStreamDefaultWriterGetDesiredSize(writer) {\n    const stream = writer._ownerWritableStream;\n    const state = stream._state;\n    if (state === 'errored' || state === 'erroring') {\n        return null;\n    }\n    if (state === 'closed') {\n        return 0;\n    }\n    return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\nfunction WritableStreamDefaultWriterRelease(writer) {\n    const stream = writer._ownerWritableStream;\n    const releasedError = new TypeError('Writer was released and can no longer be used to monitor the stream\\'s closedness');\n    WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n    // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n    // rejected until afterwards. This means that simply testing state will not work.\n    WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n    stream._writer = undefined;\n    writer._ownerWritableStream = undefined;\n}\nfunction WritableStreamDefaultWriterWrite(writer, chunk) {\n    const stream = writer._ownerWritableStream;\n    const controller = stream._writableStreamController;\n    const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n    if (stream !== writer._ownerWritableStream) {\n        return promiseRejectedWith(defaultWriterLockException('write to'));\n    }\n    const state = stream._state;\n    if (state === 'errored') {\n        return promiseRejectedWith(stream._storedError);\n    }\n    if (WritableStreamCloseQueuedOrInFlight(stream) === true || state === 'closed') {\n        return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n    }\n    if (state === 'erroring') {\n        return promiseRejectedWith(stream._storedError);\n    }\n    const promise = WritableStreamAddWriteRequest(stream);\n    WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n    return promise;\n}\nclass WritableStreamDefaultController {\n    /** @internal */\n    constructor() {\n        throw new TypeError('WritableStreamDefaultController cannot be constructed explicitly');\n    }\n    error(e) {\n        if (IsWritableStreamDefaultController(this) === false) {\n            throw new TypeError('WritableStreamDefaultController.prototype.error can only be used on a WritableStreamDefaultController');\n        }\n        const state = this._controlledWritableStream._state;\n        if (state !== 'writable') {\n            // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n            // just treat it as a no-op.\n            return;\n        }\n        WritableStreamDefaultControllerError(this, e);\n    }\n    /** @internal */\n    [AbortSteps](reason) {\n        const result = this._abortAlgorithm(reason);\n        WritableStreamDefaultControllerClearAlgorithms(this);\n        return result;\n    }\n    /** @internal */\n    [ErrorSteps]() {\n        ResetQueue(this);\n    }\n}\n// Abstract operations implementing interface required by the WritableStream.\nfunction IsWritableStreamDefaultController(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n        return false;\n    }\n    return true;\n}\nfunction SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) {\n    controller._controlledWritableStream = stream;\n    stream._writableStreamController = controller;\n    // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n    controller._queue = undefined;\n    controller._queueTotalSize = undefined;\n    ResetQueue(controller);\n    controller._started = false;\n    controller._strategySizeAlgorithm = sizeAlgorithm;\n    controller._strategyHWM = highWaterMark;\n    controller._writeAlgorithm = writeAlgorithm;\n    controller._closeAlgorithm = closeAlgorithm;\n    controller._abortAlgorithm = abortAlgorithm;\n    const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n    WritableStreamUpdateBackpressure(stream, backpressure);\n    const startResult = startAlgorithm();\n    const startPromise = promiseResolvedWith(startResult);\n    uponPromise(startPromise, () => {\n        controller._started = true;\n        WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n    }, r => {\n        controller._started = true;\n        WritableStreamDealWithRejection(stream, r);\n    });\n}\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingS