Modules

node_modules/@grpc/grpc-js/build/src/backoff-timeout.d.ts

@@ -0,0 +1,31 @@
+export interface BackoffOptions {
+    initialDelay?: number;
+    multiplier?: number;
+    jitter?: number;
+    maxDelay?: number;
+}
+export declare class BackoffTimeout {
+    private callback;
+    private initialDelay;
+    private multiplier;
+    private maxDelay;
+    private jitter;
+    private nextDelay;
+    private timerId;
+    private running;
+    constructor(callback: () => void, options?: BackoffOptions);
+    /**
+     * Call the callback after the current amount of delay time
+     */
+    runOnce(): void;
+    /**
+     * Stop the timer. The callback will not be called until `runOnce` is called
+     * again.
+     */
+    stop(): void;
+    /**
+     * Reset the delay time to its initial value.
+     */
+    reset(): void;
+    isRunning(): boolean;
+}

node_modules/@grpc/grpc-js/build/src/backoff-timeout.js

@@ -0,0 +1,90 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const INITIAL_BACKOFF_MS = 1000;
+const BACKOFF_MULTIPLIER = 1.6;
+const MAX_BACKOFF_MS = 120000;
+const BACKOFF_JITTER = 0.2;
+/**
+ * Get a number uniformly at random in the range [min, max)
+ * @param min
+ * @param max
+ */
+function uniformRandom(min, max) {
+    return Math.random() * (max - min) + min;
+}
+class BackoffTimeout {
+    constructor(callback, options) {
+        this.callback = callback;
+        this.initialDelay = INITIAL_BACKOFF_MS;
+        this.multiplier = BACKOFF_MULTIPLIER;
+        this.maxDelay = MAX_BACKOFF_MS;
+        this.jitter = BACKOFF_JITTER;
+        this.running = false;
+        if (options) {
+            if (options.initialDelay) {
+                this.initialDelay = options.initialDelay;
+            }
+            if (options.multiplier) {
+                this.multiplier = options.multiplier;
+            }
+            if (options.jitter) {
+                this.jitter = options.jitter;
+            }
+            if (options.maxDelay) {
+                this.maxDelay = options.maxDelay;
+            }
+        }
+        this.nextDelay = this.initialDelay;
+        this.timerId = setTimeout(() => { }, 0);
+        clearTimeout(this.timerId);
+    }
+    /**
+     * Call the callback after the current amount of delay time
+     */
+    runOnce() {
+        this.running = true;
+        this.timerId = setTimeout(() => {
+            this.callback();
+            this.running = false;
+        }, this.nextDelay);
+        const nextBackoff = Math.min(this.nextDelay * this.multiplier, this.maxDelay);
+        const jitterMagnitude = nextBackoff * this.jitter;
+        this.nextDelay =
+            nextBackoff + uniformRandom(-jitterMagnitude, jitterMagnitude);
+    }
+    /**
+     * Stop the timer. The callback will not be called until `runOnce` is called
+     * again.
+     */
+    stop() {
+        clearTimeout(this.timerId);
+        this.running = false;
+    }
+    /**
+     * Reset the delay time to its initial value.
+     */
+    reset() {
+        this.nextDelay = this.initialDelay;
+    }
+    isRunning() {
+        return this.running;
+    }
+}
+exports.BackoffTimeout = BackoffTimeout;
+//# sourceMappingURL=backoff-timeout.js.map

node_modules/@grpc/grpc-js/build/src/backoff-timeout.js.map

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node_modules/@grpc/grpc-js/build/src/call-credentials-filter.d.ts

@@ -0,0 +1,16 @@
+import { Call } from './call-stream';
+import { Channel } from './channel';
+import { BaseFilter, Filter, FilterFactory } from './filter';
+import { Metadata } from './metadata';
+export declare class CallCredentialsFilter extends BaseFilter implements Filter {
+    private readonly channel;
+    private readonly stream;
+    private serviceUrl;
+    constructor(channel: Channel, stream: Call);
+    sendMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+}
+export declare class CallCredentialsFilterFactory implements FilterFactory<CallCredentialsFilter> {
+    private readonly channel;
+    constructor(channel: Channel);
+    createFilter(callStream: Call): CallCredentialsFilter;
+}

node_modules/@grpc/grpc-js/build/src/call-credentials-filter.js

@@ -0,0 +1,60 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const filter_1 = require("./filter");
+class CallCredentialsFilter extends filter_1.BaseFilter {
+    constructor(channel, stream) {
+        super();
+        this.channel = channel;
+        this.stream = stream;
+        this.channel = channel;
+        this.stream = stream;
+        const splitPath = stream.getMethod().split('/');
+        let serviceName = '';
+        /* The standard path format is "/{serviceName}/{methodName}", so if we split
+         * by '/', the first item should be empty and the second should be the
+         * service name */
+        if (splitPath.length >= 2) {
+            serviceName = splitPath[1];
+        }
+        /* Currently, call credentials are only allowed on HTTPS connections, so we
+         * can assume that the scheme is "https" */
+        this.serviceUrl = `https://${stream.getHost()}/${serviceName}`;
+    }
+    async sendMetadata(metadata) {
+        const credentials = this.stream.getCredentials();
+        const credsMetadata = credentials.generateMetadata({
+            service_url: this.serviceUrl,
+        });
+        const resultMetadata = await metadata;
+        resultMetadata.merge(await credsMetadata);
+        return resultMetadata;
+    }
+}
+exports.CallCredentialsFilter = CallCredentialsFilter;
+class CallCredentialsFilterFactory {
+    constructor(channel) {
+        this.channel = channel;
+        this.channel = channel;
+    }
+    createFilter(callStream) {
+        return new CallCredentialsFilter(this.channel, callStream);
+    }
+}
+exports.CallCredentialsFilterFactory = CallCredentialsFilterFactory;
+//# sourceMappingURL=call-credentials-filter.js.map

node_modules/@grpc/grpc-js/build/src/call-credentials-filter.js.map

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node_modules/@grpc/grpc-js/build/src/call-credentials.d.ts

@@ -0,0 +1,39 @@
+import { Metadata } from './metadata';
+export interface CallMetadataOptions {
+    service_url: string;
+}
+export declare type CallMetadataGenerator = (options: CallMetadataOptions, cb: (err: Error | null, metadata?: Metadata) => void) => void;
+/**
+ * A class that represents a generic method of adding authentication-related
+ * metadata on a per-request basis.
+ */
+export declare abstract class CallCredentials {
+    /**
+     * Asynchronously generates a new Metadata object.
+     * @param options Options used in generating the Metadata object.
+     */
+    abstract generateMetadata(options: CallMetadataOptions): Promise<Metadata>;
+    /**
+     * Creates a new CallCredentials object from properties of both this and
+     * another CallCredentials object. This object's metadata generator will be
+     * called first.
+     * @param callCredentials The other CallCredentials object.
+     */
+    abstract compose(callCredentials: CallCredentials): CallCredentials;
+    /**
+     * Check whether two call credentials objects are equal. Separate
+     * SingleCallCredentials with identical metadata generator functions are
+     * equal.
+     * @param other The other CallCredentials object to compare with.
+     */
+    abstract _equals(other: CallCredentials): boolean;
+    /**
+     * Creates a new CallCredentials object from a given function that generates
+     * Metadata objects.
+     * @param metadataGenerator A function that accepts a set of options, and
+     * generates a Metadata object based on these options, which is passed back
+     * to the caller via a supplied (err, metadata) callback.
+     */
+    static createFromMetadataGenerator(metadataGenerator: CallMetadataGenerator): CallCredentials;
+    static createEmpty(): CallCredentials;
+}

node_modules/@grpc/grpc-js/build/src/call-credentials.js

@@ -0,0 +1,111 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const metadata_1 = require("./metadata");
+/**
+ * A class that represents a generic method of adding authentication-related
+ * metadata on a per-request basis.
+ */
+class CallCredentials {
+    /**
+     * Creates a new CallCredentials object from a given function that generates
+     * Metadata objects.
+     * @param metadataGenerator A function that accepts a set of options, and
+     * generates a Metadata object based on these options, which is passed back
+     * to the caller via a supplied (err, metadata) callback.
+     */
+    static createFromMetadataGenerator(metadataGenerator) {
+        return new SingleCallCredentials(metadataGenerator);
+    }
+    static createEmpty() {
+        return new EmptyCallCredentials();
+    }
+}
+exports.CallCredentials = CallCredentials;
+class ComposedCallCredentials extends CallCredentials {
+    constructor(creds) {
+        super();
+        this.creds = creds;
+    }
+    async generateMetadata(options) {
+        const base = new metadata_1.Metadata();
+        const generated = await Promise.all(this.creds.map(cred => cred.generateMetadata(options)));
+        for (const gen of generated) {
+            base.merge(gen);
+        }
+        return base;
+    }
+    compose(other) {
+        return new ComposedCallCredentials(this.creds.concat([other]));
+    }
+    _equals(other) {
+        if (this === other) {
+            return true;
+        }
+        if (other instanceof ComposedCallCredentials) {
+            return this.creds.every((value, index) => value._equals(other.creds[index]));
+        }
+        else {
+            return false;
+        }
+    }
+}
+class SingleCallCredentials extends CallCredentials {
+    constructor(metadataGenerator) {
+        super();
+        this.metadataGenerator = metadataGenerator;
+    }
+    generateMetadata(options) {
+        return new Promise((resolve, reject) => {
+            this.metadataGenerator(options, (err, metadata) => {
+                if (metadata !== undefined) {
+                    resolve(metadata);
+                }
+                else {
+                    reject(err);
+                }
+            });
+        });
+    }
+    compose(other) {
+        return new ComposedCallCredentials([this, other]);
+    }
+    _equals(other) {
+        if (this === other) {
+            return true;
+        }
+        if (other instanceof SingleCallCredentials) {
+            return this.metadataGenerator === other.metadataGenerator;
+        }
+        else {
+            return false;
+        }
+    }
+}
+class EmptyCallCredentials extends CallCredentials {
+    generateMetadata(options) {
+        return Promise.resolve(new metadata_1.Metadata());
+    }
+    compose(other) {
+        return other;
+    }
+    _equals(other) {
+        return other instanceof EmptyCallCredentials;
+    }
+}
+//# sourceMappingURL=call-credentials.js.map

node_modules/@grpc/grpc-js/build/src/call-credentials.js.map

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node_modules/@grpc/grpc-js/build/src/call-stream.d.ts

@@ -0,0 +1,101 @@
+/// <reference types="node" />
+import * as http2 from 'http2';
+import { Duplex } from 'stream';
+import { CallCredentials } from './call-credentials';
+import { Status } from './constants';
+import { EmitterAugmentation1 } from './events';
+import { Filter } from './filter';
+import { FilterStackFactory } from './filter-stack';
+import { Metadata } from './metadata';
+import { ObjectDuplex, WriteCallback } from './object-stream';
+import { ChannelImplementation } from './channel';
+import { Subchannel } from './subchannel';
+export declare type Deadline = Date | number;
+export interface CallStreamOptions {
+    deadline: Deadline;
+    flags: number;
+    host: string;
+    parentCall: Call | null;
+}
+export declare type PartialCallStreamOptions = Partial<CallStreamOptions>;
+export interface StatusObject {
+    code: Status;
+    details: string;
+    metadata: Metadata;
+}
+export declare const enum WriteFlags {
+    BufferHint = 1,
+    NoCompress = 2,
+    WriteThrough = 4
+}
+export interface WriteObject {
+    message: Buffer;
+    flags?: number;
+}
+/**
+ * This interface represents a duplex stream associated with a single gRPC call.
+ */
+export declare type Call = {
+    cancelWithStatus(status: Status, details: string): void;
+    getPeer(): string;
+    sendMetadata(metadata: Metadata): void;
+    getDeadline(): Deadline;
+    getCredentials(): CallCredentials;
+    setCredentials(credentials: CallCredentials): void;
+    getStatus(): StatusObject | null;
+    getMethod(): string;
+    getHost(): string;
+} & EmitterAugmentation1<'metadata', Metadata> & EmitterAugmentation1<'status', StatusObject> & ObjectDuplex<WriteObject, Buffer>;
+export declare class Http2CallStream extends Duplex implements Call {
+    private readonly methodName;
+    private readonly channel;
+    private readonly options;
+    private readonly channelCallCredentials;
+    private readonly callNumber;
+    credentials: CallCredentials;
+    filterStack: Filter;
+    private http2Stream;
+    private pendingRead;
+    private pendingWrite;
+    private pendingWriteCallback;
+    private pendingFinalCallback;
+    private decoder;
+    private isReadFilterPending;
+    private canPush;
+    private unpushedReadMessages;
+    private unfilteredReadMessages;
+    private mappedStatusCode;
+    private handlingHeaders;
+    private handlingTrailers;
+    private finalStatus;
+    private subchannel;
+    private disconnectListener;
+    constructor(methodName: string, channel: ChannelImplementation, options: CallStreamOptions, filterStackFactory: FilterStackFactory, channelCallCredentials: CallCredentials, callNumber: number);
+    private trace;
+    push(chunk: any, encoding?: string): boolean;
+    /**
+     * On first call, emits a 'status' event with the given StatusObject.
+     * Subsequent calls are no-ops.
+     * @param status The status of the call.
+     */
+    private endCall;
+    private handleFilterError;
+    private handleFilteredRead;
+    private filterReceivedMessage;
+    private tryPush;
+    private handleTrailers;
+    attachHttp2Stream(stream: http2.ClientHttp2Stream, subchannel: Subchannel): void;
+    sendMetadata(metadata: Metadata): void;
+    private destroyHttp2Stream;
+    cancelWithStatus(status: Status, details: string): void;
+    getDeadline(): Deadline;
+    getCredentials(): CallCredentials;
+    setCredentials(credentials: CallCredentials): void;
+    getStatus(): StatusObject | null;
+    getPeer(): string;
+    getMethod(): string;
+    getHost(): string;
+    _read(size: number): void;
+    _write(chunk: WriteObject, encoding: string, cb: WriteCallback): void;
+    _final(cb: Function): void;
+}

node_modules/@grpc/grpc-js/build/src/call-stream.js

@@ -0,0 +1,426 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const http2 = require("http2");
+const stream_1 = require("stream");
+const constants_1 = require("./constants");
+const metadata_1 = require("./metadata");
+const stream_decoder_1 = require("./stream-decoder");
+const logging = require("./logging");
+const constants_2 = require("./constants");
+const TRACER_NAME = 'call_stream';
+const { HTTP2_HEADER_STATUS, HTTP2_HEADER_CONTENT_TYPE, NGHTTP2_CANCEL, } = http2.constants;
+class Http2CallStream extends stream_1.Duplex {
+    constructor(methodName, channel, options, filterStackFactory, channelCallCredentials, callNumber) {
+        super({ objectMode: true });
+        this.methodName = methodName;
+        this.channel = channel;
+        this.options = options;
+        this.channelCallCredentials = channelCallCredentials;
+        this.callNumber = callNumber;
+        this.http2Stream = null;
+        this.pendingRead = false;
+        this.pendingWrite = null;
+        this.pendingWriteCallback = null;
+        this.pendingFinalCallback = null;
+        this.decoder = new stream_decoder_1.StreamDecoder();
+        this.isReadFilterPending = false;
+        this.canPush = false;
+        this.unpushedReadMessages = [];
+        this.unfilteredReadMessages = [];
+        // Status code mapped from :status. To be used if grpc-status is not received
+        this.mappedStatusCode = constants_1.Status.UNKNOWN;
+        // Promise objects that are re-assigned to resolving promises when headers
+        // or trailers received. Processing headers/trailers is asynchronous, so we
+        // can use these objects to await their completion. This helps us establish
+        // order of precedence when obtaining the status of the call.
+        this.handlingHeaders = Promise.resolve();
+        this.handlingTrailers = Promise.resolve();
+        // This is populated (non-null) if and only if the call has ended
+        this.finalStatus = null;
+        this.subchannel = null;
+        this.filterStack = filterStackFactory.createFilter(this);
+        this.credentials = channelCallCredentials;
+        this.disconnectListener = () => {
+            this.endCall({
+                code: constants_1.Status.UNAVAILABLE,
+                details: 'Connection dropped',
+                metadata: new metadata_1.Metadata(),
+            });
+        };
+    }
+    trace(text) {
+        logging.trace(constants_2.LogVerbosity.DEBUG, TRACER_NAME, '[' + this.callNumber + '] ' + text);
+    }
+    // tslint:disable-next-line:no-any
+    push(chunk, encoding) {
+        this.trace('pushing to reader message of length ' +
+            (chunk instanceof Buffer ? chunk.length : null));
+        return super.push(chunk);
+    }
+    /**
+     * On first call, emits a 'status' event with the given StatusObject.
+     * Subsequent calls are no-ops.
+     * @param status The status of the call.
+     */
+    endCall(status) {
+        if (this.finalStatus === null) {
+            this.trace('ended with status: code=' +
+                status.code +
+                ' details="' +
+                status.details +
+                '"');
+            this.finalStatus = status;
+            /* We do this asynchronously to ensure that no async function is in the
+             * call stack when we return control to the application. If an async
+             * function is in the call stack, any exception thrown by the application
+             * (or our tests) will bubble up and turn into promise rejection, which
+             * will result in an UnhandledPromiseRejectionWarning. Because that is
+             * a warning, the error will be effectively swallowed and execution will
+             * continue */
+            process.nextTick(() => {
+                this.emit('status', status);
+            });
+            if (this.subchannel) {
+                this.subchannel.callUnref();
+                this.subchannel.removeDisconnectListener(this.disconnectListener);
+            }
+        }
+    }
+    handleFilterError(error) {
+        this.cancelWithStatus(constants_1.Status.INTERNAL, error.message);
+    }
+    handleFilteredRead(message) {
+        /* If we the call has already ended, we don't want to do anything with
+         * this message. Dropping it on the floor is correct behavior */
+        if (this.finalStatus !== null) {
+            return;
+        }
+        this.isReadFilterPending = false;
+        if (this.canPush) {
+            if (!this.push(message)) {
+                this.canPush = false;
+                this.http2Stream.pause();
+            }
+        }
+        else {
+            this.trace('unpushedReadMessages.push message of length ' + message.length);
+            this.unpushedReadMessages.push(message);
+        }
+        if (this.unfilteredReadMessages.length > 0) {
+            /* nextMessage is guaranteed not to be undefined because
+               unfilteredReadMessages is non-empty */
+            const nextMessage = this.unfilteredReadMessages.shift();
+            this.filterReceivedMessage(nextMessage);
+        }
+    }
+    filterReceivedMessage(framedMessage) {
+        /* If we the call has already ended, we don't want to do anything with
+         * this message. Dropping it on the floor is correct behavior */
+        if (this.finalStatus !== null) {
+            return;
+        }
+        if (framedMessage === null) {
+            if (this.canPush) {
+                this.push(null);
+            }
+            else {
+                this.unpushedReadMessages.push(null);
+            }
+            return;
+        }
+        this.trace('filterReceivedMessage of length ' + framedMessage.length);
+        this.isReadFilterPending = true;
+        this.filterStack
+            .receiveMessage(Promise.resolve(framedMessage))
+            .then(this.handleFilteredRead.bind(this), this.handleFilterError.bind(this));
+    }
+    tryPush(messageBytes) {
+        if (this.isReadFilterPending) {
+            this.trace('[' +
+                this.callNumber +
+                '] unfilteredReadMessages.push message of length ' +
+                (messageBytes && messageBytes.length));
+            this.unfilteredReadMessages.push(messageBytes);
+        }
+        else {
+            this.filterReceivedMessage(messageBytes);
+        }
+    }
+    handleTrailers(headers) {
+        this.trace('received HTTP/2 trailing headers frame');
+        const code = this.mappedStatusCode;
+        const details = '';
+        let metadata;
+        try {
+            metadata = metadata_1.Metadata.fromHttp2Headers(headers);
+        }
+        catch (e) {
+            metadata = new metadata_1.Metadata();
+        }
+        const status = { code, details, metadata };
+        this.handlingTrailers = (async () => {
+            let finalStatus;
+            try {
+                // Attempt to assign final status.
+                finalStatus = await this.filterStack.receiveTrailers(Promise.resolve(status));
+            }
+            catch (error) {
+                await this.handlingHeaders;
+                // This is a no-op if the call was already ended when handling headers.
+                this.endCall({
+                    code: constants_1.Status.INTERNAL,
+                    details: 'Failed to process received status',
+                    metadata: new metadata_1.Metadata(),
+                });
+                return;
+            }
+            // It's possible that headers were received but not fully handled yet.
+            // Give the headers handler an opportunity to end the call first,
+            // if an error occurred.
+            await this.handlingHeaders;
+            // This is a no-op if the call was already ended when handling headers.
+            this.endCall(finalStatus);
+        })();
+    }
+    attachHttp2Stream(stream, subchannel) {
+        if (this.finalStatus !== null) {
+            stream.close(NGHTTP2_CANCEL);
+        }
+        else {
+            this.trace('attachHttp2Stream from subchannel ' + subchannel.getAddress());
+            this.http2Stream = stream;
+            this.subchannel = subchannel;
+            subchannel.addDisconnectListener(this.disconnectListener);
+            subchannel.callRef();
+            stream.on('response', (headers, flags) => {
+                this.trace('received HTTP/2 headers frame');
+                switch (headers[':status']) {
+                    // TODO(murgatroid99): handle 100 and 101
+                    case 400:
+                        this.mappedStatusCode = constants_1.Status.INTERNAL;
+                        break;
+                    case 401:
+                        this.mappedStatusCode = constants_1.Status.UNAUTHENTICATED;
+                        break;
+                    case 403:
+                        this.mappedStatusCode = constants_1.Status.PERMISSION_DENIED;
+                        break;
+                    case 404:
+                        this.mappedStatusCode = constants_1.Status.UNIMPLEMENTED;
+                        break;
+                    case 429:
+                    case 502:
+                    case 503:
+                    case 504:
+                        this.mappedStatusCode = constants_1.Status.UNAVAILABLE;
+                        break;
+                    default:
+                        this.mappedStatusCode = constants_1.Status.UNKNOWN;
+                }
+                if (flags & http2.constants.NGHTTP2_FLAG_END_STREAM) {
+                    this.handleTrailers(headers);
+                }
+                else {
+                    let metadata;
+                    try {
+                        metadata = metadata_1.Metadata.fromHttp2Headers(headers);
+                    }
+                    catch (error) {
+                        this.endCall({
+                            code: constants_1.Status.UNKNOWN,
+                            details: error.message,
+                            metadata: new metadata_1.Metadata(),
+                        });
+                        return;
+                    }
+                    this.handlingHeaders = this.filterStack
+                        .receiveMetadata(Promise.resolve(metadata))
+                        .then(finalMetadata => {
+                        this.emit('metadata', finalMetadata);
+                    })
+                        .catch(error => {
+                        this.destroyHttp2Stream();
+                        this.endCall({
+                            code: constants_1.Status.UNKNOWN,
+                            details: error.message,
+                            metadata: new metadata_1.Metadata(),
+                        });
+                    });
+                }
+            });
+            stream.on('trailers', this.handleTrailers.bind(this));
+            stream.on('data', (data) => {
+                this.trace('receive HTTP/2 data frame of length ' + data.length);
+                const messages = this.decoder.write(data);
+                for (const message of messages) {
+                    this.trace('parsed message of length ' + message.length);
+                    this.tryPush(message);
+                }
+            });
+            stream.on('end', () => {
+                this.trace('received HTTP/2 end of data flag');
+                this.tryPush(null);
+            });
+            stream.on('close', async () => {
+                this.trace('HTTP/2 stream closed with code ' + stream.rstCode);
+                let code;
+                let details = '';
+                switch (stream.rstCode) {
+                    case http2.constants.NGHTTP2_REFUSED_STREAM:
+                        code = constants_1.Status.UNAVAILABLE;
+                        details = 'Stream refused by server';
+                        break;
+                    case http2.constants.NGHTTP2_CANCEL:
+                        code = constants_1.Status.CANCELLED;
+                        details = 'Call cancelled';
+                        break;
+                    case http2.constants.NGHTTP2_ENHANCE_YOUR_CALM:
+                        code = constants_1.Status.RESOURCE_EXHAUSTED;
+                        details = 'Bandwidth exhausted';
+                        break;
+                    case http2.constants.NGHTTP2_INADEQUATE_SECURITY:
+                        code = constants_1.Status.PERMISSION_DENIED;
+                        details = 'Protocol not secure enough';
+                        break;
+                    default:
+                        code = constants_1.Status.INTERNAL;
+                }
+                // This guarantees that if trailers were received, the value of the
+                // 'grpc-status' header takes precedence for emitted status data.
+                await this.handlingTrailers;
+                // This is a no-op if trailers were received at all.
+                // This is OK, because status codes emitted here correspond to more
+                // catastrophic issues that prevent us from receiving trailers in the
+                // first place.
+                this.endCall({ code, details, metadata: new metadata_1.Metadata() });
+            });
+            stream.on('error', (err) => {
+                /* We need an error handler here to stop "Uncaught Error" exceptions
+                 * from bubbling up. However, errors here should all correspond to
+                 * "close" events, where we will handle the error more granularly */
+            });
+            if (!this.pendingRead) {
+                stream.pause();
+            }
+            if (this.pendingWrite) {
+                if (!this.pendingWriteCallback) {
+                    throw new Error('Invalid state in write handling code');
+                }
+                stream.write(this.pendingWrite, this.pendingWriteCallback);
+            }
+            if (this.pendingFinalCallback) {
+                this.trace('calling end() on HTTP/2 stream');
+                stream.end(this.pendingFinalCallback);
+            }
+        }
+    }
+    sendMetadata(metadata) {
+        this.trace('Sending metadata');
+        this.channel._startCallStream(this, metadata);
+    }
+    destroyHttp2Stream() {
+        // The http2 stream could already have been destroyed if cancelWithStatus
+        // is called in response to an internal http2 error.
+        if (this.http2Stream !== null && !this.http2Stream.destroyed) {
+            /* TODO(murgatroid99): Determine if we want to send different RST_STREAM
+             * codes based on the status code */
+            this.http2Stream.close(NGHTTP2_CANCEL);
+        }
+    }
+    cancelWithStatus(status, details) {
+        this.destroyHttp2Stream();
+        (async () => {
+            // If trailers are currently being processed, the call should be ended
+            // by handleTrailers instead.
+            await this.handlingTrailers;
+            this.endCall({ code: status, details, metadata: new metadata_1.Metadata() });
+        })();
+    }
+    getDeadline() {
+        return this.options.deadline;
+    }
+    getCredentials() {
+        return this.credentials;
+    }
+    setCredentials(credentials) {
+        this.credentials = this.channelCallCredentials.compose(credentials);
+    }
+    getStatus() {
+        return this.finalStatus;
+    }
+    getPeer() {
+        throw new Error('Not yet implemented');
+    }
+    getMethod() {
+        return this.methodName;
+    }
+    getHost() {
+        return this.options.host;
+    }
+    _read(size) {
+        /* If we have already emitted a status, we should not emit any more
+         * messages and we should communicate that the stream has ended */
+        if (this.finalStatus !== null) {
+            this.push(null);
+            return;
+        }
+        this.canPush = true;
+        if (this.http2Stream === null) {
+            this.pendingRead = true;
+        }
+        else {
+            while (this.unpushedReadMessages.length > 0) {
+                const nextMessage = this.unpushedReadMessages.shift();
+                this.canPush = this.push(nextMessage);
+                if (nextMessage === null || !this.canPush) {
+                    this.canPush = false;
+                    return;
+                }
+            }
+            /* Only resume reading from the http2Stream if we don't have any pending
+             * messages to emit, and we haven't gotten the signal to stop pushing
+             * messages */
+            this.http2Stream.resume();
+        }
+    }
+    _write(chunk, encoding, cb) {
+        this.trace('write() called with message of length ' + chunk.message.length);
+        this.filterStack.sendMessage(Promise.resolve(chunk)).then(message => {
+            if (this.http2Stream === null) {
+                this.pendingWrite = message.message;
+                this.pendingWriteCallback = cb;
+            }
+            else {
+                this.http2Stream.write(message.message, cb);
+            }
+        }, this.handleFilterError.bind(this));
+    }
+    _final(cb) {
+        this.trace('end() called');
+        if (this.http2Stream === null) {
+            this.pendingFinalCallback = cb;
+        }
+        else {
+            this.trace('calling end() on HTTP/2 stream');
+            this.http2Stream.end(cb);
+        }
+    }
+}
+exports.Http2CallStream = Http2CallStream;
+//# sourceMappingURL=call-stream.js.map

node_modules/@grpc/grpc-js/build/src/call.d.ts

@@ -0,0 +1,79 @@
+/// <reference types="node" />
+import { EventEmitter } from 'events';
+import { Duplex, Readable, Writable } from 'stream';
+import { Call, StatusObject } from './call-stream';
+import { EmitterAugmentation1 } from './events';
+import { Metadata } from './metadata';
+import { ObjectReadable, ObjectWritable } from './object-stream';
+/**
+ * A type extending the built-in Error object with additional fields.
+ */
+export declare type ServiceError = StatusObject & Error;
+/**
+ * A base type for all user-facing values returned by client-side method calls.
+ */
+export declare type SurfaceCall = {
+    cancel(): void;
+    getPeer(): string;
+} & EmitterAugmentation1<'metadata', Metadata> & EmitterAugmentation1<'status', StatusObject> & EventEmitter;
+/**
+ * A type representing the return value of a unary method call.
+ */
+export declare type ClientUnaryCall = SurfaceCall;
+/**
+ * A type representing the return value of a server stream method call.
+ */
+export declare type ClientReadableStream<ResponseType> = {
+    deserialize: (chunk: Buffer) => ResponseType;
+} & SurfaceCall & ObjectReadable<ResponseType>;
+/**
+ * A type representing the return value of a client stream method call.
+ */
+export declare type ClientWritableStream<RequestType> = {
+    serialize: (value: RequestType) => Buffer;
+} & SurfaceCall & ObjectWritable<RequestType>;
+/**
+ * A type representing the return value of a bidirectional stream method call.
+ */
+export declare type ClientDuplexStream<RequestType, ResponseType> = ClientWritableStream<RequestType> & ClientReadableStream<ResponseType>;
+/**
+ * Construct a ServiceError from a StatusObject. This function exists primarily
+ * as an attempt to make the error stack trace clearly communicate that the
+ * error is not necessarily a problem in gRPC itself.
+ * @param status
+ */
+export declare function callErrorFromStatus(status: StatusObject): ServiceError;
+export declare class ClientUnaryCallImpl extends EventEmitter implements ClientUnaryCall {
+    private readonly call;
+    constructor(call: Call);
+    cancel(): void;
+    getPeer(): string;
+}
+export declare class ClientReadableStreamImpl<ResponseType> extends Readable implements ClientReadableStream<ResponseType> {
+    private readonly call;
+    readonly deserialize: (chunk: Buffer) => ResponseType;
+    constructor(call: Call, deserialize: (chunk: Buffer) => ResponseType);
+    cancel(): void;
+    getPeer(): string;
+    _read(_size: number): void;
+}
+export declare class ClientWritableStreamImpl<RequestType> extends Writable implements ClientWritableStream<RequestType> {
+    private readonly call;
+    readonly serialize: (value: RequestType) => Buffer;
+    constructor(call: Call, serialize: (value: RequestType) => Buffer);
+    cancel(): void;
+    getPeer(): string;
+    _write(chunk: RequestType, encoding: string, cb: Function): void;
+    _final(cb: Function): void;
+}
+export declare class ClientDuplexStreamImpl<RequestType, ResponseType> extends Duplex implements ClientDuplexStream<RequestType, ResponseType> {
+    private readonly call;
+    readonly serialize: (value: RequestType) => Buffer;
+    readonly deserialize: (chunk: Buffer) => ResponseType;
+    constructor(call: Call, serialize: (value: RequestType) => Buffer, deserialize: (chunk: Buffer) => ResponseType);
+    cancel(): void;
+    getPeer(): string;
+    _read(_size: number): void;
+    _write(chunk: RequestType, encoding: string, cb: Function): void;
+    _final(cb: Function): void;
+}

node_modules/@grpc/grpc-js/build/src/call.js

@@ -0,0 +1,180 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const events_1 = require("events");
+const stream_1 = require("stream");
+const constants_1 = require("./constants");
+/**
+ * Construct a ServiceError from a StatusObject. This function exists primarily
+ * as an attempt to make the error stack trace clearly communicate that the
+ * error is not necessarily a problem in gRPC itself.
+ * @param status
+ */
+function callErrorFromStatus(status) {
+    const message = `${status.code} ${constants_1.Status[status.code]}: ${status.details}`;
+    return Object.assign(new Error(message), status);
+}
+exports.callErrorFromStatus = callErrorFromStatus;
+class ClientUnaryCallImpl extends events_1.EventEmitter {
+    constructor(call) {
+        super();
+        this.call = call;
+        call.on('metadata', (metadata) => {
+            this.emit('metadata', metadata);
+        });
+        call.on('status', (status) => {
+            this.emit('status', status);
+        });
+    }
+    cancel() {
+        this.call.cancelWithStatus(constants_1.Status.CANCELLED, 'Cancelled on client');
+    }
+    getPeer() {
+        return this.call.getPeer();
+    }
+}
+exports.ClientUnaryCallImpl = ClientUnaryCallImpl;
+function setUpReadableStream(stream, call, deserialize) {
+    let statusEmitted = false;
+    call.on('data', (data) => {
+        let deserialized;
+        try {
+            deserialized = deserialize(data);
+        }
+        catch (e) {
+            call.cancelWithStatus(constants_1.Status.INTERNAL, 'Failed to parse server response');
+            return;
+        }
+        if (!stream.push(deserialized)) {
+            call.pause();
+        }
+    });
+    call.on('end', () => {
+        if (statusEmitted) {
+            stream.push(null);
+        }
+        else {
+            call.once('status', () => {
+                stream.push(null);
+            });
+        }
+    });
+    call.on('status', (status) => {
+        if (status.code !== constants_1.Status.OK) {
+            stream.emit('error', callErrorFromStatus(status));
+        }
+        stream.emit('status', status);
+        statusEmitted = true;
+    });
+    call.pause();
+}
+class ClientReadableStreamImpl extends stream_1.Readable {
+    constructor(call, deserialize) {
+        super({ objectMode: true });
+        this.call = call;
+        this.deserialize = deserialize;
+        call.on('metadata', (metadata) => {
+            this.emit('metadata', metadata);
+        });
+        setUpReadableStream(this, call, deserialize);
+    }
+    cancel() {
+        this.call.cancelWithStatus(constants_1.Status.CANCELLED, 'Cancelled on client');
+    }
+    getPeer() {
+        return this.call.getPeer();
+    }
+    _read(_size) {
+        this.call.resume();
+    }
+}
+exports.ClientReadableStreamImpl = ClientReadableStreamImpl;
+function tryWrite(call, serialize, chunk, encoding, cb) {
+    let message;
+    const flags = Number(encoding);
+    try {
+        message = serialize(chunk);
+    }
+    catch (e) {
+        call.cancelWithStatus(constants_1.Status.INTERNAL, 'Serialization failure');
+        cb(e);
+        return;
+    }
+    const writeObj = { message };
+    if (!Number.isNaN(flags)) {
+        writeObj.flags = flags;
+    }
+    call.write(writeObj, cb);
+}
+class ClientWritableStreamImpl extends stream_1.Writable {
+    constructor(call, serialize) {
+        super({ objectMode: true });
+        this.call = call;
+        this.serialize = serialize;
+        call.on('metadata', (metadata) => {
+            this.emit('metadata', metadata);
+        });
+        call.on('status', (status) => {
+            this.emit('status', status);
+        });
+    }
+    cancel() {
+        this.call.cancelWithStatus(constants_1.Status.CANCELLED, 'Cancelled on client');
+    }
+    getPeer() {
+        return this.call.getPeer();
+    }
+    _write(chunk, encoding, cb) {
+        tryWrite(this.call, this.serialize, chunk, encoding, cb);
+    }
+    _final(cb) {
+        this.call.end();
+        cb();
+    }
+}
+exports.ClientWritableStreamImpl = ClientWritableStreamImpl;
+class ClientDuplexStreamImpl extends stream_1.Duplex {
+    constructor(call, serialize, deserialize) {
+        super({ objectMode: true });
+        this.call = call;
+        this.serialize = serialize;
+        this.deserialize = deserialize;
+        call.on('metadata', (metadata) => {
+            this.emit('metadata', metadata);
+        });
+        setUpReadableStream(this, call, deserialize);
+    }
+    cancel() {
+        this.call.cancelWithStatus(constants_1.Status.CANCELLED, 'Cancelled on client');
+    }
+    getPeer() {
+        return this.call.getPeer();
+    }
+    _read(_size) {
+        this.call.resume();
+    }
+    _write(chunk, encoding, cb) {
+        tryWrite(this.call, this.serialize, chunk, encoding, cb);
+    }
+    _final(cb) {
+        this.call.end();
+        cb();
+    }
+}
+exports.ClientDuplexStreamImpl = ClientDuplexStreamImpl;
+//# sourceMappingURL=call.js.map

node_modules/@grpc/grpc-js/build/src/call.js.map

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node_modules/@grpc/grpc-js/build/src/channel-credentials.d.ts

@@ -0,0 +1,79 @@
+/// <reference types="node" />
+import { ConnectionOptions } from 'tls';
+import { CallCredentials } from './call-credentials';
+/**
+ * A certificate as received by the checkServerIdentity callback.
+ */
+export interface Certificate {
+    /**
+     * The raw certificate in DER form.
+     */
+    raw: Buffer;
+}
+/**
+ * A callback that will receive the expected hostname and presented peer
+ * certificate as parameters. The callback should return an error to
+ * indicate that the presented certificate is considered invalid and
+ * otherwise returned undefined.
+ */
+export declare type CheckServerIdentityCallback = (hostname: string, cert: Certificate) => Error | undefined;
+/**
+ * Additional peer verification options that can be set when creating
+ * SSL credentials.
+ */
+export interface VerifyOptions {
+    /**
+     * If set, this callback will be invoked after the usual hostname verification
+     * has been performed on the peer certificate.
+     */
+    checkServerIdentity?: CheckServerIdentityCallback;
+}
+/**
+ * A class that contains credentials for communicating over a channel, as well
+ * as a set of per-call credentials, which are applied to every method call made
+ * over a channel initialized with an instance of this class.
+ */
+export declare abstract class ChannelCredentials {
+    protected callCredentials: CallCredentials;
+    protected constructor(callCredentials?: CallCredentials);
+    /**
+     * Returns a copy of this object with the included set of per-call credentials
+     * expanded to include callCredentials.
+     * @param callCredentials A CallCredentials object to associate with this
+     * instance.
+     */
+    abstract compose(callCredentials: CallCredentials): ChannelCredentials;
+    /**
+     * Gets the set of per-call credentials associated with this instance.
+     */
+    _getCallCredentials(): CallCredentials;
+    /**
+     * Gets a SecureContext object generated from input parameters if this
+     * instance was created with createSsl, or null if this instance was created
+     * with createInsecure.
+     */
+    abstract _getConnectionOptions(): ConnectionOptions | null;
+    /**
+     * Indicates whether this credentials object creates a secure channel.
+     */
+    abstract _isSecure(): boolean;
+    /**
+     * Check whether two channel credentials objects are equal. Two secure
+     * credentials are equal if they were constructed with the same parameters.
+     * @param other The other ChannelCredentials Object
+     */
+    abstract _equals(other: ChannelCredentials): boolean;
+    /**
+     * Return a new ChannelCredentials instance with a given set of credentials.
+     * The resulting instance can be used to construct a Channel that communicates
+     * over TLS.
+     * @param rootCerts The root certificate data.
+     * @param privateKey The client certificate private key, if available.
+     * @param certChain The client certificate key chain, if available.
+     */
+    static createSsl(rootCerts?: Buffer | null, privateKey?: Buffer | null, certChain?: Buffer | null, verifyOptions?: VerifyOptions): ChannelCredentials;
+    /**
+     * Return a new ChannelCredentials instance with no credentials.
+     */
+    static createInsecure(): ChannelCredentials;
+}

node_modules/@grpc/grpc-js/build/src/channel-credentials.js

@@ -0,0 +1,176 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const tls_1 = require("tls");
+const call_credentials_1 = require("./call-credentials");
+const tls_helpers_1 = require("./tls-helpers");
+// tslint:disable-next-line:no-any
+function verifyIsBufferOrNull(obj, friendlyName) {
+    if (obj && !(obj instanceof Buffer)) {
+        throw new TypeError(`${friendlyName}, if provided, must be a Buffer.`);
+    }
+}
+function bufferOrNullEqual(buf1, buf2) {
+    if (buf1 === null && buf2 === null) {
+        return true;
+    }
+    else {
+        return buf1 !== null && buf2 !== null && buf1.equals(buf2);
+    }
+}
+/**
+ * A class that contains credentials for communicating over a channel, as well
+ * as a set of per-call credentials, which are applied to every method call made
+ * over a channel initialized with an instance of this class.
+ */
+class ChannelCredentials {
+    constructor(callCredentials) {
+        this.callCredentials = callCredentials || call_credentials_1.CallCredentials.createEmpty();
+    }
+    /**
+     * Gets the set of per-call credentials associated with this instance.
+     */
+    _getCallCredentials() {
+        return this.callCredentials;
+    }
+    /**
+     * Return a new ChannelCredentials instance with a given set of credentials.
+     * The resulting instance can be used to construct a Channel that communicates
+     * over TLS.
+     * @param rootCerts The root certificate data.
+     * @param privateKey The client certificate private key, if available.
+     * @param certChain The client certificate key chain, if available.
+     */
+    static createSsl(rootCerts, privateKey, certChain, verifyOptions) {
+        verifyIsBufferOrNull(rootCerts, 'Root certificate');
+        verifyIsBufferOrNull(privateKey, 'Private key');
+        verifyIsBufferOrNull(certChain, 'Certificate chain');
+        if (privateKey && !certChain) {
+            throw new Error('Private key must be given with accompanying certificate chain');
+        }
+        if (!privateKey && certChain) {
+            throw new Error('Certificate chain must be given with accompanying private key');
+        }
+        return new SecureChannelCredentialsImpl(rootCerts || tls_helpers_1.getDefaultRootsData(), privateKey || null, certChain || null, verifyOptions || {});
+    }
+    /**
+     * Return a new ChannelCredentials instance with no credentials.
+     */
+    static createInsecure() {
+        return new InsecureChannelCredentialsImpl();
+    }
+}
+exports.ChannelCredentials = ChannelCredentials;
+class InsecureChannelCredentialsImpl extends ChannelCredentials {
+    constructor(callCredentials) {
+        super(callCredentials);
+    }
+    compose(callCredentials) {
+        throw new Error('Cannot compose insecure credentials');
+    }
+    _getConnectionOptions() {
+        return null;
+    }
+    _isSecure() {
+        return false;
+    }
+    _equals(other) {
+        return other instanceof InsecureChannelCredentialsImpl;
+    }
+}
+class SecureChannelCredentialsImpl extends ChannelCredentials {
+    constructor(rootCerts, privateKey, certChain, verifyOptions) {
+        super();
+        this.rootCerts = rootCerts;
+        this.privateKey = privateKey;
+        this.certChain = certChain;
+        this.verifyOptions = verifyOptions;
+        const secureContext = tls_1.createSecureContext({
+            ca: rootCerts || undefined,
+            key: privateKey || undefined,
+            cert: certChain || undefined,
+            ciphers: tls_helpers_1.CIPHER_SUITES
+        });
+        this.connectionOptions = { secureContext };
+        if (verifyOptions && verifyOptions.checkServerIdentity) {
+            this.connectionOptions.checkServerIdentity = (host, cert) => {
+                return verifyOptions.checkServerIdentity(host, { raw: cert.raw });
+            };
+        }
+    }
+    compose(callCredentials) {
+        const combinedCallCredentials = this.callCredentials.compose(callCredentials);
+        return new ComposedChannelCredentialsImpl(this, combinedCallCredentials);
+    }
+    _getConnectionOptions() {
+        return this.connectionOptions;
+    }
+    _isSecure() {
+        return true;
+    }
+    _equals(other) {
+        if (this === other) {
+            return true;
+        }
+        if (other instanceof SecureChannelCredentialsImpl) {
+            if (!bufferOrNullEqual(this.rootCerts, other.rootCerts)) {
+                return false;
+            }
+            if (!bufferOrNullEqual(this.privateKey, other.privateKey)) {
+                return false;
+            }
+            if (!bufferOrNullEqual(this.certChain, other.certChain)) {
+                return false;
+            }
+            return (this.verifyOptions.checkServerIdentity ===
+                other.verifyOptions.checkServerIdentity);
+        }
+        else {
+            return false;
+        }
+    }
+}
+class ComposedChannelCredentialsImpl extends ChannelCredentials {
+    constructor(channelCredentials, callCreds) {
+        super(callCreds);
+        this.channelCredentials = channelCredentials;
+    }
+    compose(callCredentials) {
+        const combinedCallCredentials = this.callCredentials.compose(callCredentials);
+        return new ComposedChannelCredentialsImpl(this.channelCredentials, combinedCallCredentials);
+    }
+    _getConnectionOptions() {
+        return this.channelCredentials._getConnectionOptions();
+    }
+    _isSecure() {
+        return true;
+    }
+    _equals(other) {
+        if (this === other) {
+            return true;
+        }
+        if (other instanceof ComposedChannelCredentialsImpl) {
+            return (this.channelCredentials._equals(other.channelCredentials) &&
+                this.callCredentials._equals(other.callCredentials));
+        }
+        else {
+            return false;
+        }
+    }
+}
+//# sourceMappingURL=channel-credentials.js.map

node_modules/@grpc/grpc-js/build/src/channel-credentials.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/channel-options.d.ts

@@ -0,0 +1,35 @@
+/**
+ * An interface that contains options used when initializing a Channel instance.
+ */
+export interface ChannelOptions {
+    'grpc.ssl_target_name_override'?: string;
+    'grpc.primary_user_agent'?: string;
+    'grpc.secondary_user_agent'?: string;
+    'grpc.default_authority'?: string;
+    'grpc.keepalive_time_ms'?: number;
+    'grpc.keepalive_timeout_ms'?: number;
+    'grpc.service_config'?: string;
+    'grpc.max_concurrent_streams'?: number;
+    'grpc.initial_reconnect_backoff_ms'?: number;
+    'grpc.max_reconnect_backoff_ms'?: number;
+    'grpc.use_local_subchannel_pool'?: number;
+    [key: string]: string | number | undefined;
+}
+/**
+ * This is for checking provided options at runtime. This is an object for
+ * easier membership checking.
+ */
+export declare const recognizedOptions: {
+    'grpc.ssl_target_name_override': boolean;
+    'grpc.primary_user_agent': boolean;
+    'grpc.secondary_user_agent': boolean;
+    'grpc.default_authority': boolean;
+    'grpc.keepalive_time_ms': boolean;
+    'grpc.keepalive_timeout_ms': boolean;
+    'grpc.service_config': boolean;
+    'grpc.max_concurrent_streams': boolean;
+    'grpc.initial_reconnect_backoff_ms': boolean;
+    'grpc.max_reconnect_backoff_ms': boolean;
+    'grpc.use_local_subchannel_pool': boolean;
+};
+export declare function channelOptionsEqual(options1: ChannelOptions, options2: ChannelOptions): boolean;

node_modules/@grpc/grpc-js/build/src/channel-options.js

@@ -0,0 +1,53 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+/**
+ * This is for checking provided options at runtime. This is an object for
+ * easier membership checking.
+ */
+exports.recognizedOptions = {
+    'grpc.ssl_target_name_override': true,
+    'grpc.primary_user_agent': true,
+    'grpc.secondary_user_agent': true,
+    'grpc.default_authority': true,
+    'grpc.keepalive_time_ms': true,
+    'grpc.keepalive_timeout_ms': true,
+    'grpc.service_config': true,
+    'grpc.max_concurrent_streams': true,
+    'grpc.initial_reconnect_backoff_ms': true,
+    'grpc.max_reconnect_backoff_ms': true,
+    'grpc.use_local_subchannel_pool': true,
+};
+function channelOptionsEqual(options1, options2) {
+    const keys1 = Object.keys(options1).sort();
+    const keys2 = Object.keys(options2).sort();
+    if (keys1.length !== keys2.length) {
+        return false;
+    }
+    for (let i = 0; i < keys1.length; i += 1) {
+        if (keys1[i] !== keys2[i]) {
+            return false;
+        }
+        if (options1[keys1[i]] !== options2[keys2[i]]) {
+            return false;
+        }
+    }
+    return true;
+}
+exports.channelOptionsEqual = channelOptionsEqual;
+//# sourceMappingURL=channel-options.js.map

node_modules/@grpc/grpc-js/build/src/channel-options.js.map

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node_modules/@grpc/grpc-js/build/src/channel.d.ts

@@ -0,0 +1,89 @@
+import { Deadline, Call, Http2CallStream } from './call-stream';
+import { ChannelCredentials } from './channel-credentials';
+import { ChannelOptions } from './channel-options';
+import { Metadata } from './metadata';
+export declare enum ConnectivityState {
+    CONNECTING = 0,
+    READY = 1,
+    TRANSIENT_FAILURE = 2,
+    IDLE = 3,
+    SHUTDOWN = 4
+}
+/**
+ * An interface that represents a communication channel to a server specified
+ * by a given address.
+ */
+export interface Channel {
+    /**
+     * Close the channel. This has the same functionality as the existing
+     * grpc.Client.prototype.close
+     */
+    close(): void;
+    /**
+     * Return the target that this channel connects to
+     */
+    getTarget(): string;
+    /**
+     * Get the channel's current connectivity state. This method is here mainly
+     * because it is in the existing internal Channel class, and there isn't
+     * another good place to put it.
+     * @param tryToConnect If true, the channel will start connecting if it is
+     *     idle. Otherwise, idle channels will only start connecting when a
+     *     call starts.
+     */
+    getConnectivityState(tryToConnect: boolean): ConnectivityState;
+    /**
+     * Watch for connectivity state changes. This is also here mainly because
+     * it is in the existing external Channel class.
+     * @param currentState The state to watch for transitions from. This should
+     *     always be populated by calling getConnectivityState immediately
+     *     before.
+     * @param deadline A deadline for waiting for a state change
+     * @param callback Called with no error when a state change, or with an
+     *     error if the deadline passes without a state change.
+     */
+    watchConnectivityState(currentState: ConnectivityState, deadline: Date | number, callback: (error?: Error) => void): void;
+    /**
+     * Create a call object. Call is an opaque type that is used by the Client
+     * class. This function is called by the gRPC library when starting a
+     * request. Implementers should return an instance of Call that is returned
+     * from calling createCall on an instance of the provided Channel class.
+     * @param method The full method string to request.
+     * @param deadline The call deadline
+     * @param host A host string override for making the request
+     * @param parentCall A server call to propagate some information from
+     * @param propagateFlags A bitwise combination of elements of grpc.propagate
+     *     that indicates what information to propagate from parentCall.
+     */
+    createCall(method: string, deadline: Deadline | null | undefined, host: string | null | undefined, parentCall: Call | null | undefined, propagateFlags: number | null | undefined): Call;
+}
+export declare class ChannelImplementation implements Channel {
+    private target;
+    private readonly credentials;
+    private readonly options;
+    private resolvingLoadBalancer;
+    private subchannelPool;
+    private connectivityState;
+    private currentPicker;
+    private pickQueue;
+    private connectivityStateWatchers;
+    private defaultAuthority;
+    private filterStackFactory;
+    constructor(target: string, credentials: ChannelCredentials, options: ChannelOptions);
+    /**
+     * Check the picker output for the given call and corresponding metadata,
+     * and take any relevant actions. Should not be called while iterating
+     * over pickQueue.
+     * @param callStream
+     * @param callMetadata
+     */
+    private tryPick;
+    private removeConnectivityStateWatcher;
+    private updateState;
+    _startCallStream(stream: Http2CallStream, metadata: Metadata): void;
+    close(): void;
+    getTarget(): string;
+    getConnectivityState(tryToConnect: boolean): ConnectivityState;
+    watchConnectivityState(currentState: ConnectivityState, deadline: Date | number, callback: (error?: Error) => void): void;
+    createCall(method: string, deadline: Deadline | null | undefined, host: string | null | undefined, parentCall: Call | null | undefined, propagateFlags: number | null | undefined): Call;
+}

node_modules/@grpc/grpc-js/build/src/channel.js

@@ -0,0 +1,237 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const call_stream_1 = require("./call-stream");
+const resolving_load_balancer_1 = require("./resolving-load-balancer");
+const subchannel_pool_1 = require("./subchannel-pool");
+const picker_1 = require("./picker");
+const constants_1 = require("./constants");
+const filter_stack_1 = require("./filter-stack");
+const call_credentials_filter_1 = require("./call-credentials-filter");
+const deadline_filter_1 = require("./deadline-filter");
+const metadata_status_filter_1 = require("./metadata-status-filter");
+const compression_filter_1 = require("./compression-filter");
+const resolver_1 = require("./resolver");
+const service_config_1 = require("./service-config");
+const logging_1 = require("./logging");
+var ConnectivityState;
+(function (ConnectivityState) {
+    ConnectivityState[ConnectivityState["CONNECTING"] = 0] = "CONNECTING";
+    ConnectivityState[ConnectivityState["READY"] = 1] = "READY";
+    ConnectivityState[ConnectivityState["TRANSIENT_FAILURE"] = 2] = "TRANSIENT_FAILURE";
+    ConnectivityState[ConnectivityState["IDLE"] = 3] = "IDLE";
+    ConnectivityState[ConnectivityState["SHUTDOWN"] = 4] = "SHUTDOWN";
+})(ConnectivityState = exports.ConnectivityState || (exports.ConnectivityState = {}));
+let nextCallNumber = 0;
+function getNewCallNumber() {
+    const callNumber = nextCallNumber;
+    nextCallNumber += 1;
+    if (nextCallNumber >= Number.MAX_SAFE_INTEGER) {
+        nextCallNumber = 0;
+    }
+    return callNumber;
+}
+class ChannelImplementation {
+    constructor(target, credentials, options) {
+        var _a;
+        this.target = target;
+        this.credentials = credentials;
+        this.options = options;
+        this.connectivityState = ConnectivityState.IDLE;
+        this.currentPicker = new picker_1.UnavailablePicker();
+        this.pickQueue = [];
+        this.connectivityStateWatchers = [];
+        /* The global boolean parameter to getSubchannelPool has the inverse meaning to what
+         * the grpc.use_local_subchannel_pool channel option means. */
+        this.subchannelPool = subchannel_pool_1.getSubchannelPool((_a = options['grpc.use_local_subchannel_pool'], (_a !== null && _a !== void 0 ? _a : 0)) === 0);
+        const channelControlHelper = {
+            createSubchannel: (subchannelAddress, subchannelArgs) => {
+                return this.subchannelPool.getOrCreateSubchannel(this.target, subchannelAddress, Object.assign({}, this.options, subchannelArgs), this.credentials);
+            },
+            updateState: (connectivityState, picker) => {
+                this.currentPicker = picker;
+                const queueCopy = this.pickQueue.slice();
+                this.pickQueue = [];
+                for (const { callStream, callMetadata } of queueCopy) {
+                    this.tryPick(callStream, callMetadata);
+                }
+                this.updateState(connectivityState);
+            },
+            requestReresolution: () => {
+                // This should never be called.
+                throw new Error('Resolving load balancer should never call requestReresolution');
+            },
+        };
+        // TODO(murgatroid99): check channel arg for default service config
+        let defaultServiceConfig = {
+            loadBalancingConfig: [],
+            methodConfig: [],
+        };
+        if (options['grpc.service_config']) {
+            defaultServiceConfig = service_config_1.validateServiceConfig(JSON.parse(options['grpc.service_config']));
+        }
+        this.resolvingLoadBalancer = new resolving_load_balancer_1.ResolvingLoadBalancer(target, channelControlHelper, defaultServiceConfig);
+        this.filterStackFactory = new filter_stack_1.FilterStackFactory([
+            new call_credentials_filter_1.CallCredentialsFilterFactory(this),
+            new deadline_filter_1.DeadlineFilterFactory(this),
+            new metadata_status_filter_1.MetadataStatusFilterFactory(this),
+            new compression_filter_1.CompressionFilterFactory(this),
+        ]);
+        // TODO(murgatroid99): Add more centralized handling of channel options
+        if (this.options['grpc.default_authority']) {
+            this.defaultAuthority = this.options['grpc.default_authority'];
+        }
+        else {
+            this.defaultAuthority = resolver_1.getDefaultAuthority(target);
+        }
+    }
+    /**
+     * Check the picker output for the given call and corresponding metadata,
+     * and take any relevant actions. Should not be called while iterating
+     * over pickQueue.
+     * @param callStream
+     * @param callMetadata
+     */
+    tryPick(callStream, callMetadata) {
+        const pickResult = this.currentPicker.pick({ metadata: callMetadata });
+        switch (pickResult.pickResultType) {
+            case picker_1.PickResultType.COMPLETE:
+                if (pickResult.subchannel === null) {
+                    callStream.cancelWithStatus(constants_1.Status.UNAVAILABLE, 'Request dropped by load balancing policy');
+                    // End the call with an error
+                }
+                else {
+                    /* If the subchannel disconnects between calling pick and getting
+                     * the filter stack metadata, the call will end with an error. */
+                    callStream.filterStack
+                        .sendMetadata(Promise.resolve(callMetadata))
+                        .then(finalMetadata => {
+                        if (pickResult.subchannel.getConnectivityState() ===
+                            ConnectivityState.READY) {
+                            try {
+                                pickResult.subchannel.startCallStream(finalMetadata, callStream);
+                            }
+                            catch (error) {
+                                callStream.cancelWithStatus(constants_1.Status.UNAVAILABLE, 'Failed to start call on picked subchannel');
+                            }
+                        }
+                        else {
+                            callStream.cancelWithStatus(constants_1.Status.UNAVAILABLE, 'Connection dropped while starting call');
+                        }
+                    }, (error) => {
+                        // We assume the error code isn't 0 (Status.OK)
+                        callStream.cancelWithStatus(error.code || constants_1.Status.UNKNOWN, `Getting metadata from plugin failed with error: ${error.message}`);
+                    });
+                }
+                break;
+            case picker_1.PickResultType.QUEUE:
+                this.pickQueue.push({ callStream, callMetadata });
+                break;
+            case picker_1.PickResultType.TRANSIENT_FAILURE:
+                if (callMetadata.getOptions().waitForReady) {
+                    this.pickQueue.push({ callStream, callMetadata });
+                }
+                else {
+                    callStream.cancelWithStatus(pickResult.status.code, pickResult.status.details);
+                }
+                break;
+            default:
+                throw new Error(`Invalid state: unknown pickResultType ${pickResult.pickResultType}`);
+        }
+    }
+    removeConnectivityStateWatcher(watcherObject) {
+        const watcherIndex = this.connectivityStateWatchers.findIndex(value => value === watcherObject);
+        if (watcherIndex >= 0) {
+            this.connectivityStateWatchers.splice(watcherIndex, 1);
+        }
+    }
+    updateState(newState) {
+        logging_1.trace(constants_1.LogVerbosity.DEBUG, 'connectivity_state', this.target +
+            ' ' +
+            ConnectivityState[this.connectivityState] +
+            ' -> ' +
+            ConnectivityState[newState]);
+        this.connectivityState = newState;
+        const watchersCopy = this.connectivityStateWatchers.slice();
+        for (const watcherObject of watchersCopy) {
+            if (newState !== watcherObject.currentState) {
+                watcherObject.callback();
+                clearTimeout(watcherObject.timer);
+                this.removeConnectivityStateWatcher(watcherObject);
+            }
+        }
+    }
+    _startCallStream(stream, metadata) {
+        this.tryPick(stream, metadata.clone());
+    }
+    close() {
+        this.resolvingLoadBalancer.destroy();
+        this.updateState(ConnectivityState.SHUTDOWN);
+        this.subchannelPool.unrefUnusedSubchannels();
+    }
+    getTarget() {
+        return this.target;
+    }
+    getConnectivityState(tryToConnect) {
+        const connectivityState = this.connectivityState;
+        if (tryToConnect) {
+            this.resolvingLoadBalancer.exitIdle();
+        }
+        return connectivityState;
+    }
+    watchConnectivityState(currentState, deadline, callback) {
+        const deadlineDate = deadline instanceof Date ? deadline : new Date(deadline);
+        const now = new Date();
+        if (deadlineDate <= now) {
+            process.nextTick(callback, new Error('Deadline passed without connectivity state change'));
+            return;
+        }
+        const watcherObject = {
+            currentState,
+            callback,
+            timer: setTimeout(() => {
+                this.removeConnectivityStateWatcher(watcherObject);
+                callback(new Error('Deadline passed without connectivity state change'));
+            }, deadlineDate.getTime() - now.getTime()),
+        };
+        this.connectivityStateWatchers.push(watcherObject);
+    }
+    createCall(method, deadline, host, parentCall, propagateFlags) {
+        if (this.connectivityState === ConnectivityState.SHUTDOWN) {
+            throw new Error('Channel has been shut down');
+        }
+        const callNumber = getNewCallNumber();
+        logging_1.trace(constants_1.LogVerbosity.DEBUG, 'channel', this.target +
+            ' createCall [' +
+            callNumber +
+            '] method="' +
+            method +
+            '", deadline=' +
+            deadline);
+        const finalOptions = {
+            deadline: deadline === null || deadline === undefined ? Infinity : deadline,
+            flags: propagateFlags || 0,
+            host: host || this.defaultAuthority,
+            parentCall: parentCall || null,
+        };
+        const stream = new call_stream_1.Http2CallStream(method, this, finalOptions, this.filterStackFactory, this.credentials._getCallCredentials(), callNumber);
+        return stream;
+    }
+}
+exports.ChannelImplementation = ChannelImplementation;
+//# sourceMappingURL=channel.js.map

node_modules/@grpc/grpc-js/build/src/client-interceptors.d.ts

@@ -0,0 +1,111 @@
+import { Metadata } from './metadata';
+import { Listener, MetadataListener, MessageListener, StatusListener, InterceptingListener, MessageContext } from './call-stream';
+import { Status } from './constants';
+import { Channel } from './channel';
+import { CallOptions } from './client';
+import { CallCredentials } from './call-credentials';
+import { ClientMethodDefinition } from './make-client';
+/**
+ * Error class associated with passing both interceptors and interceptor
+ * providers to a client constructor or as call options.
+ */
+export declare class InterceptorConfigurationError extends Error {
+    constructor(message: string);
+}
+export interface MetadataRequester {
+    (metadata: Metadata, listener: InterceptingListener, next: (metadata: Metadata, listener: InterceptingListener | Listener) => void): void;
+}
+export interface MessageRequester {
+    (message: any, next: (message: any) => void): void;
+}
+export interface CloseRequester {
+    (next: () => void): void;
+}
+export interface CancelRequester {
+    (next: () => void): void;
+}
+/**
+ * An object with methods for intercepting and modifying outgoing call operations.
+ */
+export interface FullRequester {
+    start: MetadataRequester;
+    sendMessage: MessageRequester;
+    halfClose: CloseRequester;
+    cancel: CancelRequester;
+}
+export declare type Requester = Partial<FullRequester>;
+export declare class ListenerBuilder {
+    private metadata;
+    private message;
+    private status;
+    withOnReceiveMetadata(onReceiveMetadata: MetadataListener): this;
+    withOnReceiveMessage(onReceiveMessage: MessageListener): this;
+    withOnReceiveStatus(onReceiveStatus: StatusListener): this;
+    build(): Listener;
+}
+export declare class RequesterBuilder {
+    private start;
+    private message;
+    private halfClose;
+    private cancel;
+    withStart(start: MetadataRequester): this;
+    withSendMessage(sendMessage: MessageRequester): this;
+    withHalfClose(halfClose: CloseRequester): this;
+    withCancel(cancel: CancelRequester): this;
+    build(): Requester;
+}
+export interface InterceptorOptions extends CallOptions {
+    method_definition: ClientMethodDefinition<any, any>;
+}
+export interface InterceptingCallInterface {
+    cancelWithStatus(status: Status, details: string): void;
+    getPeer(): string;
+    start(metadata: Metadata, listener?: Partial<InterceptingListener>): void;
+    sendMessageWithContext(context: MessageContext, message: any): void;
+    sendMessage(message: any): void;
+    startRead(): void;
+    halfClose(): void;
+    setCredentials(credentials: CallCredentials): void;
+}
+export declare class InterceptingCall implements InterceptingCallInterface {
+    private nextCall;
+    /**
+     * The requester that this InterceptingCall uses to modify outgoing operations
+     */
+    private requester;
+    /**
+     * Indicates that a message has been passed to the listener's onReceiveMessage
+     * method it has not been passed to the corresponding next callback
+     */
+    private processingMessage;
+    /**
+     * Indicates that a status was received but could not be propagated because
+     * a message was still being processed.
+     */
+    private pendingHalfClose;
+    constructor(nextCall: InterceptingCallInterface, requester?: Requester);
+    cancelWithStatus(status: Status, details: string): void;
+    getPeer(): string;
+    start(metadata: Metadata, interceptingListener?: Partial<InterceptingListener>): void;
+    sendMessageWithContext(context: MessageContext, message: any): void;
+    sendMessage(message: any): void;
+    startRead(): void;
+    halfClose(): void;
+    setCredentials(credentials: CallCredentials): void;
+}
+export interface NextCall {
+    (options: InterceptorOptions): InterceptingCallInterface;
+}
+export interface Interceptor {
+    (options: InterceptorOptions, nextCall: NextCall): InterceptingCall;
+}
+export interface InterceptorProvider {
+    (methodDefinition: ClientMethodDefinition<any, any>): Interceptor;
+}
+export interface InterceptorArguments {
+    clientInterceptors: Interceptor[];
+    clientInterceptorProviders: InterceptorProvider[];
+    callInterceptors: Interceptor[];
+    callInterceptorProviders: InterceptorProvider[];
+}
+export declare function getInterceptingCall(interceptorArgs: InterceptorArguments, methodDefinition: ClientMethodDefinition<any, any>, options: CallOptions, channel: Channel): InterceptingCallInterface;

node_modules/@grpc/grpc-js/build/src/client-interceptors.js

@@ -0,0 +1,406 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const metadata_1 = require("./metadata");
+const call_stream_1 = require("./call-stream");
+const constants_1 = require("./constants");
+/**
+ * Error class associated with passing both interceptors and interceptor
+ * providers to a client constructor or as call options.
+ */
+class InterceptorConfigurationError extends Error {
+    constructor(message) {
+        super(message);
+        this.name = 'InterceptorConfigurationError';
+        Error.captureStackTrace(this, InterceptorConfigurationError);
+    }
+}
+exports.InterceptorConfigurationError = InterceptorConfigurationError;
+class ListenerBuilder {
+    constructor() {
+        this.metadata = undefined;
+        this.message = undefined;
+        this.status = undefined;
+    }
+    withOnReceiveMetadata(onReceiveMetadata) {
+        this.metadata = onReceiveMetadata;
+        return this;
+    }
+    withOnReceiveMessage(onReceiveMessage) {
+        this.message = onReceiveMessage;
+        return this;
+    }
+    withOnReceiveStatus(onReceiveStatus) {
+        this.status = onReceiveStatus;
+        return this;
+    }
+    build() {
+        return {
+            onReceiveMetadata: this.metadata,
+            onReceiveMessage: this.message,
+            onReceiveStatus: this.status,
+        };
+    }
+}
+exports.ListenerBuilder = ListenerBuilder;
+class RequesterBuilder {
+    constructor() {
+        this.start = undefined;
+        this.message = undefined;
+        this.halfClose = undefined;
+        this.cancel = undefined;
+    }
+    withStart(start) {
+        this.start = start;
+        return this;
+    }
+    withSendMessage(sendMessage) {
+        this.message = sendMessage;
+        return this;
+    }
+    withHalfClose(halfClose) {
+        this.halfClose = halfClose;
+        return this;
+    }
+    withCancel(cancel) {
+        this.cancel = cancel;
+        return this;
+    }
+    build() {
+        return {
+            start: this.start,
+            sendMessage: this.message,
+            halfClose: this.halfClose,
+            cancel: this.cancel,
+        };
+    }
+}
+exports.RequesterBuilder = RequesterBuilder;
+/**
+ * A Listener with a default pass-through implementation of each method. Used
+ * for filling out Listeners with some methods omitted.
+ */
+const defaultListener = {
+    onReceiveMetadata: (metadata, next) => {
+        next(metadata);
+    },
+    onReceiveMessage: (message, next) => {
+        next(message);
+    },
+    onReceiveStatus: (status, next) => {
+        next(status);
+    },
+};
+/**
+ * A Requester with a default pass-through implementation of each method. Used
+ * for filling out Requesters with some methods omitted.
+ */
+const defaultRequester = {
+    start: (metadata, listener, next) => {
+        next(metadata, listener);
+    },
+    sendMessage: (message, next) => {
+        next(message);
+    },
+    halfClose: next => {
+        next();
+    },
+    cancel: next => {
+        next();
+    },
+};
+class InterceptingCall {
+    constructor(nextCall, requester) {
+        var _a, _b, _c, _d;
+        this.nextCall = nextCall;
+        /**
+         * Indicates that a message has been passed to the listener's onReceiveMessage
+         * method it has not been passed to the corresponding next callback
+         */
+        this.processingMessage = false;
+        /**
+         * Indicates that a status was received but could not be propagated because
+         * a message was still being processed.
+         */
+        this.pendingHalfClose = false;
+        if (requester) {
+            this.requester = {
+                start: (_a = requester.start, (_a !== null && _a !== void 0 ? _a : defaultRequester.start)),
+                sendMessage: (_b = requester.sendMessage, (_b !== null && _b !== void 0 ? _b : defaultRequester.sendMessage)),
+                halfClose: (_c = requester.halfClose, (_c !== null && _c !== void 0 ? _c : defaultRequester.halfClose)),
+                cancel: (_d = requester.cancel, (_d !== null && _d !== void 0 ? _d : defaultRequester.cancel)),
+            };
+        }
+        else {
+            this.requester = defaultRequester;
+        }
+    }
+    cancelWithStatus(status, details) {
+        this.requester.cancel(() => {
+            this.nextCall.cancelWithStatus(status, details);
+        });
+    }
+    getPeer() {
+        return this.nextCall.getPeer();
+    }
+    start(metadata, interceptingListener) {
+        var _a, _b, _c, _d, _e, _f, _g, _h, _j;
+        const fullInterceptingListener = {
+            onReceiveMetadata: (_c = (_b = (_a = interceptingListener) === null || _a === void 0 ? void 0 : _a.onReceiveMetadata) === null || _b === void 0 ? void 0 : _b.bind(interceptingListener), (_c !== null && _c !== void 0 ? _c : (metadata => { }))),
+            onReceiveMessage: (_f = (_e = (_d = interceptingListener) === null || _d === void 0 ? void 0 : _d.onReceiveMessage) === null || _e === void 0 ? void 0 : _e.bind(interceptingListener), (_f !== null && _f !== void 0 ? _f : (message => { }))),
+            onReceiveStatus: (_j = (_h = (_g = interceptingListener) === null || _g === void 0 ? void 0 : _g.onReceiveStatus) === null || _h === void 0 ? void 0 : _h.bind(interceptingListener), (_j !== null && _j !== void 0 ? _j : (status => { }))),
+        };
+        this.requester.start(metadata, fullInterceptingListener, (md, listener) => {
+            var _a, _b, _c;
+            let finalInterceptingListener;
+            if (call_stream_1.isInterceptingListener(listener)) {
+                finalInterceptingListener = listener;
+            }
+            else {
+                const fullListener = {
+                    onReceiveMetadata: (_a = listener.onReceiveMetadata, (_a !== null && _a !== void 0 ? _a : defaultListener.onReceiveMetadata)),
+                    onReceiveMessage: (_b = listener.onReceiveMessage, (_b !== null && _b !== void 0 ? _b : defaultListener.onReceiveMessage)),
+                    onReceiveStatus: (_c = listener.onReceiveStatus, (_c !== null && _c !== void 0 ? _c : defaultListener.onReceiveStatus)),
+                };
+                finalInterceptingListener = new call_stream_1.InterceptingListenerImpl(fullListener, fullInterceptingListener);
+            }
+            this.nextCall.start(md, finalInterceptingListener);
+        });
+    }
+    // tslint:disable-next-line no-any
+    sendMessageWithContext(context, message) {
+        this.processingMessage = true;
+        this.requester.sendMessage(message, finalMessage => {
+            this.processingMessage = false;
+            this.nextCall.sendMessageWithContext(context, finalMessage);
+            if (this.pendingHalfClose) {
+                this.nextCall.halfClose();
+            }
+        });
+    }
+    // tslint:disable-next-line no-any
+    sendMessage(message) {
+        this.sendMessageWithContext({}, message);
+    }
+    startRead() {
+        this.nextCall.startRead();
+    }
+    halfClose() {
+        this.requester.halfClose(() => {
+            if (this.processingMessage) {
+                this.pendingHalfClose = true;
+            }
+            else {
+                this.nextCall.halfClose();
+            }
+        });
+    }
+    setCredentials(credentials) {
+        this.nextCall.setCredentials(credentials);
+    }
+}
+exports.InterceptingCall = InterceptingCall;
+function getCall(channel, path, options) {
+    let deadline;
+    let host;
+    const parent = null;
+    let propagateFlags;
+    let credentials;
+    if (options) {
+        deadline = options.deadline;
+        host = options.host;
+        propagateFlags = options.propagate_flags;
+        credentials = options.credentials;
+    }
+    if (deadline === undefined) {
+        deadline = Infinity;
+    }
+    const call = channel.createCall(path, deadline, host, parent, propagateFlags);
+    if (credentials) {
+        call.setCredentials(credentials);
+    }
+    return call;
+}
+/**
+ * InterceptingCall implementation that directly owns the underlying Call
+ * object and handles serialization and deseraizliation.
+ */
+class BaseInterceptingCall {
+    // tslint:disable-next-line no-any
+    constructor(call, methodDefinition) {
+        this.call = call;
+        this.methodDefinition = methodDefinition;
+    }
+    cancelWithStatus(status, details) {
+        this.call.cancelWithStatus(status, details);
+    }
+    getPeer() {
+        return this.call.getPeer();
+    }
+    setCredentials(credentials) {
+        this.call.setCredentials(credentials);
+    }
+    // tslint:disable-next-line no-any
+    sendMessageWithContext(context, message) {
+        let serialized;
+        try {
+            serialized = this.methodDefinition.requestSerialize(message);
+            this.call.sendMessageWithContext(context, serialized);
+        }
+        catch (e) {
+            this.call.cancelWithStatus(constants_1.Status.INTERNAL, 'Serialization failure');
+        }
+    }
+    // tslint:disable-next-line no-any
+    sendMessage(message) {
+        this.sendMessageWithContext({}, message);
+    }
+    start(metadata, interceptingListener) {
+        let readError = null;
+        this.call.start(metadata, {
+            onReceiveMetadata: metadata => {
+                var _a, _b, _c;
+                (_c = (_a = interceptingListener) === null || _a === void 0 ? void 0 : (_b = _a).onReceiveMetadata) === null || _c === void 0 ? void 0 : _c.call(_b, metadata);
+            },
+            onReceiveMessage: message => {
+                var _a, _b, _c;
+                // tslint:disable-next-line no-any
+                let deserialized;
+                try {
+                    deserialized = this.methodDefinition.responseDeserialize(message);
+                    (_c = (_a = interceptingListener) === null || _a === void 0 ? void 0 : (_b = _a).onReceiveMessage) === null || _c === void 0 ? void 0 : _c.call(_b, deserialized);
+                }
+                catch (e) {
+                    readError = {
+                        code: constants_1.Status.INTERNAL,
+                        details: 'Failed to parse server response',
+                        metadata: new metadata_1.Metadata(),
+                    };
+                    this.call.cancelWithStatus(readError.code, readError.details);
+                }
+            },
+            onReceiveStatus: status => {
+                var _a, _b, _c, _d, _e, _f;
+                if (readError) {
+                    (_c = (_a = interceptingListener) === null || _a === void 0 ? void 0 : (_b = _a).onReceiveStatus) === null || _c === void 0 ? void 0 : _c.call(_b, readError);
+                }
+                else {
+                    (_f = (_d = interceptingListener) === null || _d === void 0 ? void 0 : (_e = _d).onReceiveStatus) === null || _f === void 0 ? void 0 : _f.call(_e, status);
+                }
+            },
+        });
+    }
+    startRead() {
+        this.call.startRead();
+    }
+    halfClose() {
+        this.call.halfClose();
+    }
+}
+/**
+ * BaseInterceptingCall with special-cased behavior for methods with unary
+ * responses.
+ */
+class BaseUnaryInterceptingCall extends BaseInterceptingCall {
+    // tslint:disable-next-line no-any
+    constructor(call, methodDefinition) {
+        super(call, methodDefinition);
+    }
+    start(metadata, listener) {
+        var _a, _b, _c;
+        let receivedMessage = false;
+        const wrapperListener = {
+            onReceiveMetadata: (_c = (_b = (_a = listener) === null || _a === void 0 ? void 0 : _a.onReceiveMetadata) === null || _b === void 0 ? void 0 : _b.bind(listener), (_c !== null && _c !== void 0 ? _c : (metadata => { }))),
+            // tslint:disable-next-line no-any
+            onReceiveMessage: (message) => {
+                var _a, _b, _c;
+                receivedMessage = true;
+                (_c = (_a = listener) === null || _a === void 0 ? void 0 : (_b = _a).onReceiveMessage) === null || _c === void 0 ? void 0 : _c.call(_b, message);
+            },
+            onReceiveStatus: (status) => {
+                var _a, _b, _c, _d, _e, _f;
+                if (!receivedMessage) {
+                    (_c = (_a = listener) === null || _a === void 0 ? void 0 : (_b = _a).onReceiveMessage) === null || _c === void 0 ? void 0 : _c.call(_b, null);
+                }
+                (_f = (_d = listener) === null || _d === void 0 ? void 0 : (_e = _d).onReceiveStatus) === null || _f === void 0 ? void 0 : _f.call(_e, status);
+            },
+        };
+        super.start(metadata, wrapperListener);
+        this.call.startRead();
+    }
+}
+/**
+ * BaseInterceptingCall with special-cased behavior for methods with streaming
+ * responses.
+ */
+class BaseStreamingInterceptingCall extends BaseInterceptingCall {
+}
+// tslint:disable-next-line no-any
+function getBottomInterceptingCall(channel, path, options, methodDefinition) {
+    const call = getCall(channel, path, options);
+    if (methodDefinition.responseStream) {
+        return new BaseStreamingInterceptingCall(call, methodDefinition);
+    }
+    else {
+        return new BaseUnaryInterceptingCall(call, methodDefinition);
+    }
+}
+// tslint:disable-next-line no-any
+function getInterceptingCall(interceptorArgs, methodDefinition, options, channel) {
+    if (interceptorArgs.clientInterceptors.length > 0 &&
+        interceptorArgs.clientInterceptorProviders.length > 0) {
+        throw new InterceptorConfigurationError('Both interceptors and interceptor_providers were passed as options ' +
+            'to the client constructor. Only one of these is allowed.');
+    }
+    if (interceptorArgs.callInterceptors.length > 0 &&
+        interceptorArgs.callInterceptorProviders.length > 0) {
+        throw new InterceptorConfigurationError('Both interceptors and interceptor_providers were passed as call ' +
+            'options. Only one of these is allowed.');
+    }
+    let interceptors = [];
+    // Interceptors passed to the call override interceptors passed to the client constructor
+    if (interceptorArgs.callInterceptors.length > 0 ||
+        interceptorArgs.callInterceptorProviders.length > 0) {
+        interceptors = []
+            .concat(interceptorArgs.callInterceptors, interceptorArgs.callInterceptorProviders.map(provider => provider(methodDefinition)))
+            .filter(interceptor => interceptor);
+        // Filter out falsy values when providers return nothing
+    }
+    else {
+        interceptors = []
+            .concat(interceptorArgs.clientInterceptors, interceptorArgs.clientInterceptorProviders.map(provider => provider(methodDefinition)))
+            .filter(interceptor => interceptor);
+        // Filter out falsy values when providers return nothing
+    }
+    const interceptorOptions = Object.assign({}, options, {
+        method_definition: methodDefinition,
+    });
+    /* For each interceptor in the list, the nextCall function passed to it is
+     * based on the next interceptor in the list, using a nextCall function
+     * constructed with the following interceptor in the list, and so on. The
+     * initialValue, which is effectively at the end of the list, is a nextCall
+     * function that invokes getBottomInterceptingCall, the result of which
+     * handles (de)serialization and also gets the underlying call from the
+     * channel. */
+    const getCall = interceptors.reduceRight((nextCall, nextInterceptor) => {
+        return currentOptions => nextInterceptor(currentOptions, nextCall);
+    }, (finalOptions) => getBottomInterceptingCall(channel, methodDefinition.path, finalOptions, methodDefinition));
+    return getCall(interceptorOptions);
+}
+exports.getInterceptingCall = getInterceptingCall;
+//# sourceMappingURL=client-interceptors.js.map

node_modules/@grpc/grpc-js/build/src/client.d.ts

@@ -0,0 +1,49 @@
+/// <reference types="node" />
+import { ClientDuplexStream, ClientReadableStream, ClientUnaryCall, ClientWritableStream, ServiceError } from './call';
+import { CallCredentials } from './call-credentials';
+import { Deadline } from './call-stream';
+import { Channel } from './channel';
+import { ChannelCredentials } from './channel-credentials';
+import { ChannelOptions } from './channel-options';
+import { Metadata } from './metadata';
+declare const CHANNEL_SYMBOL: unique symbol;
+export interface UnaryCallback<ResponseType> {
+    (err: ServiceError | null, value?: ResponseType): void;
+}
+export interface CallOptions {
+    deadline?: Deadline;
+    host?: string;
+    propagate_flags?: number;
+    credentials?: CallCredentials;
+}
+export declare type ClientOptions = Partial<ChannelOptions> & {
+    channelOverride?: Channel;
+    channelFactoryOverride?: (address: string, credentials: ChannelCredentials, options: ClientOptions) => Channel;
+};
+/**
+ * A generic gRPC client. Primarily useful as a base class for all generated
+ * clients.
+ */
+export declare class Client {
+    private readonly [CHANNEL_SYMBOL];
+    constructor(address: string, credentials: ChannelCredentials, options?: ClientOptions);
+    close(): void;
+    getChannel(): Channel;
+    waitForReady(deadline: Deadline, callback: (error?: Error) => void): void;
+    private handleUnaryResponse;
+    private checkOptionalUnaryResponseArguments;
+    makeUnaryRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, argument: RequestType, metadata: Metadata, options: CallOptions, callback: UnaryCallback<ResponseType>): ClientUnaryCall;
+    makeUnaryRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, argument: RequestType, metadata: Metadata, callback: UnaryCallback<ResponseType>): ClientUnaryCall;
+    makeUnaryRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, argument: RequestType, options: CallOptions, callback: UnaryCallback<ResponseType>): ClientUnaryCall;
+    makeUnaryRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, argument: RequestType, callback: UnaryCallback<ResponseType>): ClientUnaryCall;
+    makeClientStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, metadata: Metadata, options: CallOptions, callback: UnaryCallback<ResponseType>): ClientWritableStream<RequestType>;
+    makeClientStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, metadata: Metadata, callback: UnaryCallback<ResponseType>): ClientWritableStream<RequestType>;
+    makeClientStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, options: CallOptions, callback: UnaryCallback<ResponseType>): ClientWritableStream<RequestType>;
+    makeClientStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, callback: UnaryCallback<ResponseType>): ClientWritableStream<RequestType>;
+    private checkMetadataAndOptions;
+    makeServerStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, argument: RequestType, metadata: Metadata, options?: CallOptions): ClientReadableStream<ResponseType>;
+    makeServerStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, argument: RequestType, options?: CallOptions): ClientReadableStream<ResponseType>;
+    makeBidiStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, metadata: Metadata, options?: CallOptions): ClientDuplexStream<RequestType, ResponseType>;
+    makeBidiStreamRequest<RequestType, ResponseType>(method: string, serialize: (value: RequestType) => Buffer, deserialize: (value: Buffer) => ResponseType, options?: CallOptions): ClientDuplexStream<RequestType, ResponseType>;
+}
+export {};

node_modules/@grpc/grpc-js/build/src/client.js

@@ -0,0 +1,192 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const call_1 = require("./call");
+const channel_1 = require("./channel");
+const constants_1 = require("./constants");
+const metadata_1 = require("./metadata");
+const CHANNEL_SYMBOL = Symbol();
+/**
+ * A generic gRPC client. Primarily useful as a base class for all generated
+ * clients.
+ */
+class Client {
+    constructor(address, credentials, options = {}) {
+        if (options.channelOverride) {
+            this[CHANNEL_SYMBOL] = options.channelOverride;
+        }
+        else if (options.channelFactoryOverride) {
+            this[CHANNEL_SYMBOL] = options.channelFactoryOverride(address, credentials, options);
+        }
+        else {
+            this[CHANNEL_SYMBOL] = new channel_1.ChannelImplementation(address, credentials, options);
+        }
+    }
+    close() {
+        this[CHANNEL_SYMBOL].close();
+    }
+    getChannel() {
+        return this[CHANNEL_SYMBOL];
+    }
+    waitForReady(deadline, callback) {
+        const checkState = (err) => {
+            if (err) {
+                callback(new Error('Failed to connect before the deadline'));
+                return;
+            }
+            let newState;
+            try {
+                newState = this[CHANNEL_SYMBOL].getConnectivityState(true);
+            }
+            catch (e) {
+                callback(new Error('The channel has been closed'));
+                return;
+            }
+            if (newState === channel_1.ConnectivityState.READY) {
+                callback();
+            }
+            else {
+                try {
+                    this[CHANNEL_SYMBOL].watchConnectivityState(newState, deadline, checkState);
+                }
+                catch (e) {
+                    callback(new Error('The channel has been closed'));
+                }
+            }
+        };
+        setImmediate(checkState);
+    }
+    handleUnaryResponse(call, deserialize, callback) {
+        let responseMessage = null;
+        call.on('data', (data) => {
+            if (responseMessage != null) {
+                call.cancelWithStatus(constants_1.Status.INTERNAL, 'Too many responses received');
+            }
+            try {
+                responseMessage = deserialize(data);
+            }
+            catch (e) {
+                call.cancelWithStatus(constants_1.Status.INTERNAL, 'Failed to parse server response');
+            }
+        });
+        call.on('status', (status) => {
+            /* We assume that call emits status after it emits end, and that it
+             * accounts for any cancelWithStatus calls up until it emits status.
+             * Therefore, considering the above event handlers, status.code should be
+             * OK if and only if we have a non-null responseMessage */
+            if (status.code === constants_1.Status.OK) {
+                callback(null, responseMessage);
+            }
+            else {
+                callback(call_1.callErrorFromStatus(status));
+            }
+        });
+    }
+    checkOptionalUnaryResponseArguments(arg1, arg2, arg3) {
+        if (arg1 instanceof Function) {
+            return { metadata: new metadata_1.Metadata(), options: {}, callback: arg1 };
+        }
+        else if (arg2 instanceof Function) {
+            if (arg1 instanceof metadata_1.Metadata) {
+                return { metadata: arg1, options: {}, callback: arg2 };
+            }
+            else {
+                return { metadata: new metadata_1.Metadata(), options: arg1, callback: arg2 };
+            }
+        }
+        else {
+            if (!(arg1 instanceof metadata_1.Metadata &&
+                arg2 instanceof Object &&
+                arg3 instanceof Function)) {
+                throw new Error('Incorrect arguments passed');
+            }
+            return { metadata: arg1, options: arg2, callback: arg3 };
+        }
+    }
+    makeUnaryRequest(method, serialize, deserialize, argument, metadata, options, callback) {
+        ({ metadata, options, callback } = this.checkOptionalUnaryResponseArguments(metadata, options, callback));
+        const call = this[CHANNEL_SYMBOL].createCall(method, options.deadline, options.host, null, options.propagate_flags);
+        if (options.credentials) {
+            call.setCredentials(options.credentials);
+        }
+        const message = serialize(argument);
+        const writeObj = { message };
+        call.sendMetadata(metadata);
+        call.write(writeObj);
+        call.end();
+        this.handleUnaryResponse(call, deserialize, callback);
+        return new call_1.ClientUnaryCallImpl(call);
+    }
+    makeClientStreamRequest(method, serialize, deserialize, metadata, options, callback) {
+        ({ metadata, options, callback } = this.checkOptionalUnaryResponseArguments(metadata, options, callback));
+        const call = this[CHANNEL_SYMBOL].createCall(method, options.deadline, options.host, null, options.propagate_flags);
+        if (options.credentials) {
+            call.setCredentials(options.credentials);
+        }
+        call.sendMetadata(metadata);
+        this.handleUnaryResponse(call, deserialize, callback);
+        return new call_1.ClientWritableStreamImpl(call, serialize);
+    }
+    checkMetadataAndOptions(arg1, arg2) {
+        let metadata;
+        let options;
+        if (arg1 instanceof metadata_1.Metadata) {
+            metadata = arg1;
+            if (arg2) {
+                options = arg2;
+            }
+            else {
+                options = {};
+            }
+        }
+        else {
+            if (arg1) {
+                options = arg1;
+            }
+            else {
+                options = {};
+            }
+            metadata = new metadata_1.Metadata();
+        }
+        return { metadata, options };
+    }
+    makeServerStreamRequest(method, serialize, deserialize, argument, metadata, options) {
+        ({ metadata, options } = this.checkMetadataAndOptions(metadata, options));
+        const call = this[CHANNEL_SYMBOL].createCall(method, options.deadline, options.host, null, options.propagate_flags);
+        if (options.credentials) {
+            call.setCredentials(options.credentials);
+        }
+        const message = serialize(argument);
+        const writeObj = { message };
+        call.sendMetadata(metadata);
+        call.write(writeObj);
+        call.end();
+        return new call_1.ClientReadableStreamImpl(call, deserialize);
+    }
+    makeBidiStreamRequest(method, serialize, deserialize, metadata, options) {
+        ({ metadata, options } = this.checkMetadataAndOptions(metadata, options));
+        const call = this[CHANNEL_SYMBOL].createCall(method, options.deadline, options.host, null, options.propagate_flags);
+        if (options.credentials) {
+            call.setCredentials(options.credentials);
+        }
+        call.sendMetadata(metadata);
+        return new call_1.ClientDuplexStreamImpl(call, serialize, deserialize);
+    }
+}
+exports.Client = Client;
+//# sourceMappingURL=client.js.map

node_modules/@grpc/grpc-js/build/src/compression-filter.d.ts

@@ -0,0 +1,18 @@
+/// <reference types="node" />
+import { Call, WriteObject } from './call-stream';
+import { Channel } from './channel';
+import { BaseFilter, Filter, FilterFactory } from './filter';
+import { Metadata } from './metadata';
+export declare class CompressionFilter extends BaseFilter implements Filter {
+    private sendCompression;
+    private receiveCompression;
+    sendMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    receiveMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    sendMessage(message: Promise<WriteObject>): Promise<WriteObject>;
+    receiveMessage(message: Promise<Buffer>): Promise<Buffer>;
+}
+export declare class CompressionFilterFactory implements FilterFactory<CompressionFilter> {
+    private readonly channel;
+    constructor(channel: Channel);
+    createFilter(callStream: Call): CompressionFilter;
+}

node_modules/@grpc/grpc-js/build/src/compression-filter.js

@@ -0,0 +1,201 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const zlib = require("zlib");
+const filter_1 = require("./filter");
+class CompressionHandler {
+    /**
+     * @param message Raw uncompressed message bytes
+     * @param compress Indicates whether the message should be compressed
+     * @return Framed message, compressed if applicable
+     */
+    async writeMessage(message, compress) {
+        let messageBuffer = message;
+        if (compress) {
+            messageBuffer = await this.compressMessage(messageBuffer);
+        }
+        const output = Buffer.allocUnsafe(messageBuffer.length + 5);
+        output.writeUInt8(compress ? 1 : 0, 0);
+        output.writeUInt32BE(messageBuffer.length, 1);
+        messageBuffer.copy(output, 5);
+        return output;
+    }
+    /**
+     * @param data Framed message, possibly compressed
+     * @return Uncompressed message
+     */
+    async readMessage(data) {
+        const compressed = data.readUInt8(0) === 1;
+        let messageBuffer = data.slice(5);
+        if (compressed) {
+            messageBuffer = await this.decompressMessage(messageBuffer);
+        }
+        return messageBuffer;
+    }
+}
+class IdentityHandler extends CompressionHandler {
+    async compressMessage(message) {
+        return message;
+    }
+    async writeMessage(message, compress) {
+        const output = Buffer.allocUnsafe(message.length + 5);
+        /* With "identity" compression, messages should always be marked as
+         * uncompressed */
+        output.writeUInt8(0, 0);
+        output.writeUInt32BE(message.length, 1);
+        message.copy(output, 5);
+        return output;
+    }
+    decompressMessage(message) {
+        return Promise.reject(new Error('Received compressed message but "grpc-encoding" header was identity'));
+    }
+}
+class DeflateHandler extends CompressionHandler {
+    compressMessage(message) {
+        return new Promise((resolve, reject) => {
+            zlib.deflate(message, (err, output) => {
+                if (err) {
+                    reject(err);
+                }
+                else {
+                    resolve(output);
+                }
+            });
+        });
+    }
+    decompressMessage(message) {
+        return new Promise((resolve, reject) => {
+            zlib.inflate(message, (err, output) => {
+                if (err) {
+                    reject(err);
+                }
+                else {
+                    resolve(output);
+                }
+            });
+        });
+    }
+}
+class GzipHandler extends CompressionHandler {
+    compressMessage(message) {
+        return new Promise((resolve, reject) => {
+            zlib.gzip(message, (err, output) => {
+                if (err) {
+                    reject(err);
+                }
+                else {
+                    resolve(output);
+                }
+            });
+        });
+    }
+    decompressMessage(message) {
+        return new Promise((resolve, reject) => {
+            zlib.unzip(message, (err, output) => {
+                if (err) {
+                    reject(err);
+                }
+                else {
+                    resolve(output);
+                }
+            });
+        });
+    }
+}
+class UnknownHandler extends CompressionHandler {
+    constructor(compressionName) {
+        super();
+        this.compressionName = compressionName;
+    }
+    compressMessage(message) {
+        return Promise.reject(new Error(`Received message compressed with unsupported compression method ${this.compressionName}`));
+    }
+    decompressMessage(message) {
+        // This should be unreachable
+        return Promise.reject(new Error(`Compression method not supported: ${this.compressionName}`));
+    }
+}
+function getCompressionHandler(compressionName) {
+    switch (compressionName) {
+        case 'identity':
+            return new IdentityHandler();
+        case 'deflate':
+            return new DeflateHandler();
+        case 'gzip':
+            return new GzipHandler();
+        default:
+            return new UnknownHandler(compressionName);
+    }
+}
+class CompressionFilter extends filter_1.BaseFilter {
+    constructor() {
+        super(...arguments);
+        this.sendCompression = new IdentityHandler();
+        this.receiveCompression = new IdentityHandler();
+    }
+    async sendMetadata(metadata) {
+        const headers = await metadata;
+        headers.set('grpc-encoding', 'identity');
+        headers.set('grpc-accept-encoding', 'identity,deflate,gzip');
+        return headers;
+    }
+    async receiveMetadata(metadata) {
+        const headers = await metadata;
+        const receiveEncoding = headers.get('grpc-encoding');
+        if (receiveEncoding.length > 0) {
+            const encoding = receiveEncoding[0];
+            if (typeof encoding === 'string') {
+                this.receiveCompression = getCompressionHandler(encoding);
+            }
+        }
+        headers.remove('grpc-encoding');
+        headers.remove('grpc-accept-encoding');
+        return headers;
+    }
+    async sendMessage(message) {
+        /* This filter is special. The input message is the bare message bytes,
+         * and the output is a framed and possibly compressed message. For this
+         * reason, this filter should be at the bottom of the filter stack */
+        const resolvedMessage = await message;
+        const compress = resolvedMessage.flags === undefined
+            ? false
+            : (resolvedMessage.flags & 2 /* NoCompress */) === 0;
+        return {
+            message: await this.sendCompression.writeMessage(resolvedMessage.message, compress),
+            flags: resolvedMessage.flags,
+        };
+    }
+    async receiveMessage(message) {
+        /* This filter is also special. The input message is framed and possibly
+         * compressed, and the output message is deframed and uncompressed. So
+         * this is another reason that this filter should be at the bottom of the
+         * filter stack. */
+        return this.receiveCompression.readMessage(await message);
+    }
+}
+exports.CompressionFilter = CompressionFilter;
+class CompressionFilterFactory {
+    constructor(channel) {
+        this.channel = channel;
+    }
+    createFilter(callStream) {
+        return new CompressionFilter();
+    }
+}
+exports.CompressionFilterFactory = CompressionFilterFactory;
+//# sourceMappingURL=compression-filter.js.map

node_modules/@grpc/grpc-js/build/src/compression-filter.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/constants.d.ts

@@ -0,0 +1,24 @@
+export declare enum Status {
+    OK = 0,
+    CANCELLED = 1,
+    UNKNOWN = 2,
+    INVALID_ARGUMENT = 3,
+    DEADLINE_EXCEEDED = 4,
+    NOT_FOUND = 5,
+    ALREADY_EXISTS = 6,
+    PERMISSION_DENIED = 7,
+    RESOURCE_EXHAUSTED = 8,
+    FAILED_PRECONDITION = 9,
+    ABORTED = 10,
+    OUT_OF_RANGE = 11,
+    UNIMPLEMENTED = 12,
+    INTERNAL = 13,
+    UNAVAILABLE = 14,
+    DATA_LOSS = 15,
+    UNAUTHENTICATED = 16
+}
+export declare enum LogVerbosity {
+    DEBUG = 0,
+    INFO = 1,
+    ERROR = 2
+}

node_modules/@grpc/grpc-js/build/src/constants.js

@@ -0,0 +1,45 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+var Status;
+(function (Status) {
+    Status[Status["OK"] = 0] = "OK";
+    Status[Status["CANCELLED"] = 1] = "CANCELLED";
+    Status[Status["UNKNOWN"] = 2] = "UNKNOWN";
+    Status[Status["INVALID_ARGUMENT"] = 3] = "INVALID_ARGUMENT";
+    Status[Status["DEADLINE_EXCEEDED"] = 4] = "DEADLINE_EXCEEDED";
+    Status[Status["NOT_FOUND"] = 5] = "NOT_FOUND";
+    Status[Status["ALREADY_EXISTS"] = 6] = "ALREADY_EXISTS";
+    Status[Status["PERMISSION_DENIED"] = 7] = "PERMISSION_DENIED";
+    Status[Status["RESOURCE_EXHAUSTED"] = 8] = "RESOURCE_EXHAUSTED";
+    Status[Status["FAILED_PRECONDITION"] = 9] = "FAILED_PRECONDITION";
+    Status[Status["ABORTED"] = 10] = "ABORTED";
+    Status[Status["OUT_OF_RANGE"] = 11] = "OUT_OF_RANGE";
+    Status[Status["UNIMPLEMENTED"] = 12] = "UNIMPLEMENTED";
+    Status[Status["INTERNAL"] = 13] = "INTERNAL";
+    Status[Status["UNAVAILABLE"] = 14] = "UNAVAILABLE";
+    Status[Status["DATA_LOSS"] = 15] = "DATA_LOSS";
+    Status[Status["UNAUTHENTICATED"] = 16] = "UNAUTHENTICATED";
+})(Status = exports.Status || (exports.Status = {}));
+var LogVerbosity;
+(function (LogVerbosity) {
+    LogVerbosity[LogVerbosity["DEBUG"] = 0] = "DEBUG";
+    LogVerbosity[LogVerbosity["INFO"] = 1] = "INFO";
+    LogVerbosity[LogVerbosity["ERROR"] = 2] = "ERROR";
+})(LogVerbosity = exports.LogVerbosity || (exports.LogVerbosity = {}));
+//# sourceMappingURL=constants.js.map

node_modules/@grpc/grpc-js/build/src/constants.js.map

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node_modules/@grpc/grpc-js/build/src/deadline-filter.d.ts

@@ -0,0 +1,17 @@
+import { Call } from './call-stream';
+import { Channel } from './channel';
+import { BaseFilter, Filter, FilterFactory } from './filter';
+import { Metadata } from './metadata';
+export declare class DeadlineFilter extends BaseFilter implements Filter {
+    private readonly channel;
+    private readonly callStream;
+    private timer;
+    private deadline;
+    constructor(channel: Channel, callStream: Call);
+    sendMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+}
+export declare class DeadlineFilterFactory implements FilterFactory<DeadlineFilter> {
+    private readonly channel;
+    constructor(channel: Channel);
+    createFilter(callStream: Call): DeadlineFilter;
+}

node_modules/@grpc/grpc-js/build/src/deadline-filter.js

@@ -0,0 +1,86 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const constants_1 = require("./constants");
+const filter_1 = require("./filter");
+const units = [
+    ['m', 1],
+    ['S', 1000],
+    ['M', 60 * 1000],
+    ['H', 60 * 60 * 1000],
+];
+function getDeadline(deadline) {
+    const now = new Date().getTime();
+    const timeoutMs = Math.max(deadline - now, 0);
+    for (const [unit, factor] of units) {
+        const amount = timeoutMs / factor;
+        if (amount < 1e8) {
+            return String(Math.ceil(amount)) + unit;
+        }
+    }
+    throw new Error('Deadline is too far in the future');
+}
+class DeadlineFilter extends filter_1.BaseFilter {
+    constructor(channel, callStream) {
+        super();
+        this.channel = channel;
+        this.callStream = callStream;
+        this.timer = null;
+        const callDeadline = callStream.getDeadline();
+        if (callDeadline instanceof Date) {
+            this.deadline = callDeadline.getTime();
+        }
+        else {
+            this.deadline = callDeadline;
+        }
+        const now = new Date().getTime();
+        let timeout = this.deadline - now;
+        if (timeout < 0) {
+            timeout = 0;
+        }
+        if (this.deadline !== Infinity) {
+            this.timer = setTimeout(() => {
+                callStream.cancelWithStatus(constants_1.Status.DEADLINE_EXCEEDED, 'Deadline exceeded');
+            }, timeout);
+            callStream.on('status', () => clearTimeout(this.timer));
+        }
+    }
+    async sendMetadata(metadata) {
+        if (this.deadline === Infinity) {
+            return metadata;
+        }
+        /* The input metadata promise depends on the original channel.connect()
+         * promise, so when it is complete that implies that the channel is
+         * connected */
+        const finalMetadata = await metadata;
+        const timeoutString = getDeadline(this.deadline);
+        finalMetadata.set('grpc-timeout', timeoutString);
+        return finalMetadata;
+    }
+}
+exports.DeadlineFilter = DeadlineFilter;
+class DeadlineFilterFactory {
+    constructor(channel) {
+        this.channel = channel;
+    }
+    createFilter(callStream) {
+        return new DeadlineFilter(this.channel, callStream);
+    }
+}
+exports.DeadlineFilterFactory = DeadlineFilterFactory;
+//# sourceMappingURL=deadline-filter.js.map

node_modules/@grpc/grpc-js/build/src/deadline-filter.js.map

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node_modules/@grpc/grpc-js/build/src/events.d.ts

@@ -0,0 +1,9 @@
+export interface EmitterAugmentation1<Name extends string | symbol, Arg> {
+    addListener(event: Name, listener: (arg1: Arg) => void): this;
+    emit(event: Name, arg1: Arg): boolean;
+    on(event: Name, listener: (arg1: Arg) => void): this;
+    once(event: Name, listener: (arg1: Arg) => void): this;
+    prependListener(event: Name, listener: (arg1: Arg) => void): this;
+    prependOnceListener(event: Name, listener: (arg1: Arg) => void): this;
+    removeListener(event: Name, listener: (arg1: Arg) => void): this;
+}

node_modules/@grpc/grpc-js/build/src/events.js

@@ -0,0 +1,19 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+//# sourceMappingURL=events.js.map

node_modules/@grpc/grpc-js/build/src/events.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"events.js","sourceRoot":"","sources":["../../src/events.ts"],"names":[],"mappings":";AAAA;;;;;;;;;;;;;;;GAeG"}

node_modules/@grpc/grpc-js/build/src/filter-stack.d.ts

@@ -0,0 +1,18 @@
+/// <reference types="node" />
+import { Call, StatusObject, WriteObject } from './call-stream';
+import { Filter, FilterFactory } from './filter';
+import { Metadata } from './metadata';
+export declare class FilterStack implements Filter {
+    private readonly filters;
+    constructor(filters: Filter[]);
+    sendMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    receiveMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    sendMessage(message: Promise<WriteObject>): Promise<WriteObject>;
+    receiveMessage(message: Promise<Buffer>): Promise<Buffer>;
+    receiveTrailers(status: Promise<StatusObject>): Promise<StatusObject>;
+}
+export declare class FilterStackFactory implements FilterFactory<FilterStack> {
+    private readonly factories;
+    constructor(factories: Array<FilterFactory<Filter>>);
+    createFilter(callStream: Call): FilterStack;
+}

node_modules/@grpc/grpc-js/build/src/filter-stack.js

@@ -0,0 +1,69 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+class FilterStack {
+    constructor(filters) {
+        this.filters = filters;
+    }
+    sendMetadata(metadata) {
+        let result = metadata;
+        for (let i = 0; i < this.filters.length; i++) {
+            result = this.filters[i].sendMetadata(result);
+        }
+        return result;
+    }
+    receiveMetadata(metadata) {
+        let result = metadata;
+        for (let i = this.filters.length - 1; i >= 0; i--) {
+            result = this.filters[i].receiveMetadata(result);
+        }
+        return result;
+    }
+    sendMessage(message) {
+        let result = message;
+        for (let i = 0; i < this.filters.length; i++) {
+            result = this.filters[i].sendMessage(result);
+        }
+        return result;
+    }
+    receiveMessage(message) {
+        let result = message;
+        for (let i = this.filters.length - 1; i >= 0; i--) {
+            result = this.filters[i].receiveMessage(result);
+        }
+        return result;
+    }
+    receiveTrailers(status) {
+        let result = status;
+        for (let i = this.filters.length - 1; i >= 0; i--) {
+            result = this.filters[i].receiveTrailers(result);
+        }
+        return result;
+    }
+}
+exports.FilterStack = FilterStack;
+class FilterStackFactory {
+    constructor(factories) {
+        this.factories = factories;
+    }
+    createFilter(callStream) {
+        return new FilterStack(this.factories.map(factory => factory.createFilter(callStream)));
+    }
+}
+exports.FilterStackFactory = FilterStackFactory;
+//# sourceMappingURL=filter-stack.js.map

node_modules/@grpc/grpc-js/build/src/filter-stack.js.map

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node_modules/@grpc/grpc-js/build/src/filter.d.ts

@@ -0,0 +1,24 @@
+/// <reference types="node" />
+import { Call, StatusObject, WriteObject } from './call-stream';
+import { Metadata } from './metadata';
+/**
+ * Filter classes represent related per-call logic and state that is primarily
+ * used to modify incoming and outgoing data
+ */
+export interface Filter {
+    sendMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    receiveMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    sendMessage(message: Promise<WriteObject>): Promise<WriteObject>;
+    receiveMessage(message: Promise<Buffer>): Promise<Buffer>;
+    receiveTrailers(status: Promise<StatusObject>): Promise<StatusObject>;
+}
+export declare abstract class BaseFilter {
+    sendMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    receiveMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+    sendMessage(message: Promise<WriteObject>): Promise<WriteObject>;
+    receiveMessage(message: Promise<Buffer>): Promise<Buffer>;
+    receiveTrailers(status: Promise<StatusObject>): Promise<StatusObject>;
+}
+export interface FilterFactory<T extends Filter> {
+    createFilter(callStream: Call): T;
+}

node_modules/@grpc/grpc-js/build/src/filter.js

@@ -0,0 +1,37 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+class BaseFilter {
+    async sendMetadata(metadata) {
+        return metadata;
+    }
+    async receiveMetadata(metadata) {
+        return metadata;
+    }
+    async sendMessage(message) {
+        return message;
+    }
+    async receiveMessage(message) {
+        return message;
+    }
+    async receiveTrailers(status) {
+        return status;
+    }
+}
+exports.BaseFilter = BaseFilter;
+//# sourceMappingURL=filter.js.map

node_modules/@grpc/grpc-js/build/src/filter.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"filter.js","sourceRoot":"","sources":["../../src/filter.ts"],"names":[],"mappings":";AAAA;;;;;;;;;;;;;;;GAeG;;AAqBH,MAAsB,UAAU;IAC9B,KAAK,CAAC,YAAY,CAAC,QAA2B;QAC5C,OAAO,QAAQ,CAAC;IAClB,CAAC;IAED,KAAK,CAAC,eAAe,CAAC,QAA2B;QAC/C,OAAO,QAAQ,CAAC;IAClB,CAAC;IAED,KAAK,CAAC,WAAW,CAAC,OAA6B;QAC7C,OAAO,OAAO,CAAC;IACjB,CAAC;IAED,KAAK,CAAC,cAAc,CAAC,OAAwB;QAC3C,OAAO,OAAO,CAAC;IACjB,CAAC;IAED,KAAK,CAAC,eAAe,CAAC,MAA6B;QACjD,OAAO,MAAM,CAAC;IAChB,CAAC;CACF;AApBD,gCAoBC"}

node_modules/@grpc/grpc-js/build/src/index.d.ts

@@ -0,0 +1,64 @@
+/// <reference types="node" />
+import { ClientDuplexStream, ClientReadableStream, ClientUnaryCall, ClientWritableStream, ServiceError } from './call';
+import { CallCredentials } from './call-credentials';
+import { Deadline, StatusObject } from './call-stream';
+import { Channel, ConnectivityState, ChannelImplementation } from './channel';
+import { ChannelCredentials } from './channel-credentials';
+import { CallOptions, Client } from './client';
+import { LogVerbosity, Status } from './constants';
+import { Deserialize, loadPackageDefinition, makeClientConstructor, Serialize, ServiceDefinition } from './make-client';
+import { Metadata } from './metadata';
+import { Server, UntypedHandleCall, UntypedServiceImplementation } from './server';
+import { KeyCertPair, ServerCredentials } from './server-credentials';
+import { StatusBuilder } from './status-builder';
+import { handleBidiStreamingCall, handleServerStreamingCall, handleUnaryCall, ServerUnaryCall, ServerReadableStream, ServerWritableStream, ServerDuplexStream } from './server-call';
+export interface OAuth2Client {
+    getRequestMetadata: (url: string, callback: (err: Error | null, headers?: {
+        [index: string]: string;
+    }) => void) => void;
+    getRequestHeaders: (url?: string) => Promise<{
+        [index: string]: string;
+    }>;
+}
+/**** Client Credentials ****/
+export declare const credentials: {
+    [key: string]: Function;
+};
+/**** Metadata ****/
+export { Metadata };
+/**** Constants ****/
+export { LogVerbosity as logVerbosity, Status as status, ConnectivityState as connectivityState, };
+/**** Client ****/
+export { Client, loadPackageDefinition, makeClientConstructor, makeClientConstructor as makeGenericClientConstructor, ChannelImplementation as Channel, };
+/**
+ * Close a Client object.
+ * @param client The client to close.
+ */
+export declare const closeClient: (client: Client) => void;
+export declare const waitForClientReady: (client: Client, deadline: number | Date, callback: (error?: Error | undefined) => void) => void;
+export { ChannelCredentials, CallCredentials, Deadline, Serialize as serialize, Deserialize as deserialize, ClientUnaryCall, ClientReadableStream, ClientWritableStream, ClientDuplexStream, CallOptions, StatusObject, ServiceError, ServerUnaryCall, ServerReadableStream, ServerWritableStream, ServerDuplexStream, ServiceDefinition, UntypedHandleCall, UntypedServiceImplementation, };
+/**** Server ****/
+export { handleBidiStreamingCall, handleServerStreamingCall, handleUnaryCall };
+export declare type Call = ClientUnaryCall | ClientReadableStream<any> | ClientWritableStream<any> | ClientDuplexStream<any, any>;
+export declare type MetadataListener = (metadata: Metadata, next: Function) => void;
+export declare type MessageListener = (message: any, next: Function) => void;
+export declare type StatusListener = (status: StatusObject, next: Function) => void;
+export interface Listener {
+    onReceiveMetadata?: MetadataListener;
+    onReceiveMessage?: MessageListener;
+    onReceiveStatus?: StatusListener;
+}
+/**** Unimplemented function stubs ****/
+export declare const loadObject: (value: any, options: any) => never;
+export declare const load: (filename: any, format: any, options: any) => never;
+export declare const setLogger: (logger: Partial<Console>) => void;
+export declare const setLogVerbosity: (verbosity: LogVerbosity) => void;
+export { Server };
+export { ServerCredentials };
+export { KeyCertPair };
+export declare const getClientChannel: (client: Client) => Channel;
+export { StatusBuilder };
+export declare const ListenerBuilder: () => never;
+export declare const InterceptorBuilder: () => never;
+export declare const InterceptingCall: () => never;
+export { GrpcObject } from './make-client';

node_modules/@grpc/grpc-js/build/src/index.js

@@ -0,0 +1,158 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const semver = require("semver");
+const call_credentials_1 = require("./call-credentials");
+exports.CallCredentials = call_credentials_1.CallCredentials;
+const channel_1 = require("./channel");
+exports.connectivityState = channel_1.ConnectivityState;
+exports.Channel = channel_1.ChannelImplementation;
+const channel_credentials_1 = require("./channel-credentials");
+exports.ChannelCredentials = channel_credentials_1.ChannelCredentials;
+const client_1 = require("./client");
+exports.Client = client_1.Client;
+const constants_1 = require("./constants");
+exports.logVerbosity = constants_1.LogVerbosity;
+exports.status = constants_1.Status;
+const logging = require("./logging");
+const make_client_1 = require("./make-client");
+exports.loadPackageDefinition = make_client_1.loadPackageDefinition;
+exports.makeClientConstructor = make_client_1.makeClientConstructor;
+exports.makeGenericClientConstructor = make_client_1.makeClientConstructor;
+const metadata_1 = require("./metadata");
+exports.Metadata = metadata_1.Metadata;
+const server_1 = require("./server");
+exports.Server = server_1.Server;
+const server_credentials_1 = require("./server-credentials");
+exports.ServerCredentials = server_credentials_1.ServerCredentials;
+const status_builder_1 = require("./status-builder");
+exports.StatusBuilder = status_builder_1.StatusBuilder;
+const supportedNodeVersions = require('../../package.json').engines.node;
+if (!semver.satisfies(process.version, supportedNodeVersions)) {
+    throw new Error(`@grpc/grpc-js only works on Node ${supportedNodeVersions}`);
+}
+function mixin(...sources) {
+    const result = {};
+    for (const source of sources) {
+        for (const propName of Object.getOwnPropertyNames(source)) {
+            const property = source[propName]; // tslint:disable-line no-any
+            if (typeof property === 'function') {
+                result[propName] = property;
+            }
+        }
+    }
+    return result;
+}
+/**** Client Credentials ****/
+// Using assign only copies enumerable properties, which is what we want
+exports.credentials = mixin({
+    /**
+     * Create a gRPC credential from a Google credential object.
+     * @param googleCredentials The authentication client to use.
+     * @return The resulting CallCredentials object.
+     */
+    createFromGoogleCredential: (googleCredentials) => {
+        return call_credentials_1.CallCredentials.createFromMetadataGenerator((options, callback) => {
+            // google-auth-library pre-v2.0.0 does not have getRequestHeaders
+            // but has getRequestMetadata, which is deprecated in v2.0.0
+            let getHeaders;
+            if (typeof googleCredentials.getRequestHeaders === 'function') {
+                getHeaders = googleCredentials.getRequestHeaders(options.service_url);
+            }
+            else {
+                getHeaders = new Promise((resolve, reject) => {
+                    googleCredentials.getRequestMetadata(options.service_url, (err, headers) => {
+                        if (err) {
+                            reject(err);
+                            return;
+                        }
+                        resolve(headers);
+                    });
+                });
+            }
+            getHeaders.then(headers => {
+                const metadata = new metadata_1.Metadata();
+                for (const key of Object.keys(headers)) {
+                    metadata.add(key, headers[key]);
+                }
+                callback(null, metadata);
+            }, err => {
+                callback(err);
+            });
+        });
+    },
+    /**
+     * Combine a ChannelCredentials with any number of CallCredentials into a
+     * single ChannelCredentials object.
+     * @param channelCredentials The ChannelCredentials object.
+     * @param callCredentials Any number of CallCredentials objects.
+     * @return The resulting ChannelCredentials object.
+     */
+    combineChannelCredentials: (channelCredentials, ...callCredentials) => {
+        return callCredentials.reduce((acc, other) => acc.compose(other), channelCredentials);
+    },
+    /**
+     * Combine any number of CallCredentials into a single CallCredentials
+     * object.
+     * @param first The first CallCredentials object.
+     * @param additional Any number of additional CallCredentials objects.
+     * @return The resulting CallCredentials object.
+     */
+    combineCallCredentials: (first, ...additional) => {
+        return additional.reduce((acc, other) => acc.compose(other), first);
+    },
+}, channel_credentials_1.ChannelCredentials, call_credentials_1.CallCredentials);
+/**
+ * Close a Client object.
+ * @param client The client to close.
+ */
+exports.closeClient = (client) => client.close();
+exports.waitForClientReady = (client, deadline, callback) => client.waitForReady(deadline, callback);
+/**** Unimplemented function stubs ****/
+/* tslint:disable:no-any variable-name */
+exports.loadObject = (value, options) => {
+    throw new Error('Not available in this library. Use @grpc/proto-loader and loadPackageDefinition instead');
+};
+exports.load = (filename, format, options) => {
+    throw new Error('Not available in this library. Use @grpc/proto-loader and loadPackageDefinition instead');
+};
+exports.setLogger = (logger) => {
+    logging.setLogger(logger);
+};
+exports.setLogVerbosity = (verbosity) => {
+    logging.setLoggerVerbosity(verbosity);
+};
+exports.getClientChannel = (client) => {
+    return client_1.Client.prototype.getChannel.call(client);
+};
+exports.ListenerBuilder = () => {
+    throw new Error('Not yet implemented');
+};
+exports.InterceptorBuilder = () => {
+    throw new Error('Not yet implemented');
+};
+exports.InterceptingCall = () => {
+    throw new Error('Not yet implemented');
+};
+const resolver = require("./resolver");
+const load_balancer = require("./load-balancer");
+(() => {
+    resolver.registerAll();
+    load_balancer.registerAll();
+})();
+//# sourceMappingURL=index.js.map

node_modules/@grpc/grpc-js/build/src/index.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/load-balancer-pick-first.d.ts

@@ -0,0 +1,73 @@
+import { LoadBalancer, ChannelControlHelper } from './load-balancer';
+import { LoadBalancingConfig } from './load-balancing-config';
+export declare class PickFirstLoadBalancer implements LoadBalancer {
+    private channelControlHelper;
+    /**
+     * The list of backend addresses most recently passed to `updateAddressList`.
+     */
+    private latestAddressList;
+    /**
+     * The list of subchannels this load balancer is currently attempting to
+     * connect to.
+     */
+    private subchannels;
+    /**
+     * The current connectivity state of the load balancer.
+     */
+    private currentState;
+    /**
+     * The index within the `subchannels` array of the subchannel with the most
+     * recently started connection attempt.
+     */
+    private currentSubchannelIndex;
+    private subchannelStateCounts;
+    /**
+     * The currently picked subchannel used for making calls. Populated if
+     * and only if the load balancer's current state is READY. In that case,
+     * the subchannel's current state is also READY.
+     */
+    private currentPick;
+    /**
+     * Listener callback attached to each subchannel in the `subchannels` list
+     * while establishing a connection.
+     */
+    private subchannelStateListener;
+    /**
+     * Listener callback attached to the current picked subchannel.
+     */
+    private pickedSubchannelStateListener;
+    /**
+     * Timer reference for the timer tracking when to start
+     */
+    private connectionDelayTimeout;
+    private triedAllSubchannels;
+    /**
+     * Load balancer that attempts to connect to each backend in the address list
+     * in order, and picks the first one that connects, using it for every
+     * request.
+     * @param channelControlHelper `ChannelControlHelper` instance provided by
+     *     this load balancer's owner.
+     */
+    constructor(channelControlHelper: ChannelControlHelper);
+    private startNextSubchannelConnecting;
+    /**
+     * Have a single subchannel in the `subchannels` list start connecting.
+     * @param subchannelIndex The index into the `subchannels` list.
+     */
+    private startConnecting;
+    private pickSubchannel;
+    private updateState;
+    private resetSubchannelList;
+    /**
+     * Start connecting to the address list most recently passed to
+     * `updateAddressList`.
+     */
+    private connectToAddressList;
+    updateAddressList(addressList: string[], lbConfig: LoadBalancingConfig | null): void;
+    exitIdle(): void;
+    resetBackoff(): void;
+    destroy(): void;
+    getTypeName(): string;
+    replaceChannelControlHelper(channelControlHelper: ChannelControlHelper): void;
+}
+export declare function setup(): void;

node_modules/@grpc/grpc-js/build/src/load-balancer-pick-first.js

@@ -0,0 +1,340 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const load_balancer_1 = require("./load-balancer");
+const channel_1 = require("./channel");
+const picker_1 = require("./picker");
+const logging = require("./logging");
+const constants_1 = require("./constants");
+const TRACER_NAME = 'pick_first';
+function trace(text) {
+    logging.trace(constants_1.LogVerbosity.DEBUG, TRACER_NAME, text);
+}
+const TYPE_NAME = 'pick_first';
+/**
+ * Delay after starting a connection on a subchannel before starting a
+ * connection on the next subchannel in the list, for Happy Eyeballs algorithm.
+ */
+const CONNECTION_DELAY_INTERVAL_MS = 250;
+/**
+ * Picker for a `PickFirstLoadBalancer` in the READY state. Always returns the
+ * picked subchannel.
+ */
+class PickFirstPicker {
+    constructor(subchannel) {
+        this.subchannel = subchannel;
+    }
+    pick(pickArgs) {
+        return {
+            pickResultType: picker_1.PickResultType.COMPLETE,
+            subchannel: this.subchannel,
+            status: null,
+        };
+    }
+}
+class PickFirstLoadBalancer {
+    /**
+     * Load balancer that attempts to connect to each backend in the address list
+     * in order, and picks the first one that connects, using it for every
+     * request.
+     * @param channelControlHelper `ChannelControlHelper` instance provided by
+     *     this load balancer's owner.
+     */
+    constructor(channelControlHelper) {
+        this.channelControlHelper = channelControlHelper;
+        /**
+         * The list of backend addresses most recently passed to `updateAddressList`.
+         */
+        this.latestAddressList = [];
+        /**
+         * The list of subchannels this load balancer is currently attempting to
+         * connect to.
+         */
+        this.subchannels = [];
+        /**
+         * The current connectivity state of the load balancer.
+         */
+        this.currentState = channel_1.ConnectivityState.IDLE;
+        /**
+         * The index within the `subchannels` array of the subchannel with the most
+         * recently started connection attempt.
+         */
+        this.currentSubchannelIndex = 0;
+        /**
+         * The currently picked subchannel used for making calls. Populated if
+         * and only if the load balancer's current state is READY. In that case,
+         * the subchannel's current state is also READY.
+         */
+        this.currentPick = null;
+        this.triedAllSubchannels = false;
+        this.updateState(channel_1.ConnectivityState.IDLE, new picker_1.QueuePicker(this));
+        this.subchannelStateCounts = {
+            [channel_1.ConnectivityState.CONNECTING]: 0,
+            [channel_1.ConnectivityState.IDLE]: 0,
+            [channel_1.ConnectivityState.READY]: 0,
+            [channel_1.ConnectivityState.SHUTDOWN]: 0,
+            [channel_1.ConnectivityState.TRANSIENT_FAILURE]: 0,
+        };
+        this.subchannelStateListener = (subchannel, previousState, newState) => {
+            this.subchannelStateCounts[previousState] -= 1;
+            this.subchannelStateCounts[newState] += 1;
+            /* If the subchannel we most recently attempted to start connecting
+             * to goes into TRANSIENT_FAILURE, immediately try to start
+             * connecting to the next one instead of waiting for the connection
+             * delay timer. */
+            if (subchannel === this.subchannels[this.currentSubchannelIndex] &&
+                newState === channel_1.ConnectivityState.TRANSIENT_FAILURE) {
+                this.startNextSubchannelConnecting();
+            }
+            if (newState === channel_1.ConnectivityState.READY) {
+                this.pickSubchannel(subchannel);
+                return;
+            }
+            else {
+                if (this.triedAllSubchannels &&
+                    this.subchannelStateCounts[channel_1.ConnectivityState.IDLE] ===
+                        this.subchannels.length) {
+                    /* If all of the subchannels are IDLE we should go back to a
+                     * basic IDLE state where there is no subchannel list to avoid
+                     * holding unused resources */
+                    this.resetSubchannelList();
+                }
+                if (this.currentPick === null) {
+                    if (this.triedAllSubchannels) {
+                        let newLBState;
+                        if (this.subchannelStateCounts[channel_1.ConnectivityState.CONNECTING] > 0) {
+                            newLBState = channel_1.ConnectivityState.CONNECTING;
+                        }
+                        else if (this.subchannelStateCounts[channel_1.ConnectivityState.TRANSIENT_FAILURE] >
+                            0) {
+                            newLBState = channel_1.ConnectivityState.TRANSIENT_FAILURE;
+                        }
+                        else {
+                            newLBState = channel_1.ConnectivityState.IDLE;
+                        }
+                        if (newLBState !== this.currentState) {
+                            if (newLBState === channel_1.ConnectivityState.TRANSIENT_FAILURE) {
+                                this.updateState(newLBState, new picker_1.UnavailablePicker());
+                            }
+                            else {
+                                this.updateState(newLBState, new picker_1.QueuePicker(this));
+                            }
+                        }
+                    }
+                    else {
+                        this.updateState(channel_1.ConnectivityState.CONNECTING, new picker_1.QueuePicker(this));
+                    }
+                }
+            }
+        };
+        this.pickedSubchannelStateListener = (subchannel, previousState, newState) => {
+            if (newState !== channel_1.ConnectivityState.READY) {
+                this.currentPick = null;
+                subchannel.unref();
+                subchannel.removeConnectivityStateListener(this.pickedSubchannelStateListener);
+                if (this.subchannels.length > 0) {
+                    if (this.triedAllSubchannels) {
+                        let newLBState;
+                        if (this.subchannelStateCounts[channel_1.ConnectivityState.CONNECTING] > 0) {
+                            newLBState = channel_1.ConnectivityState.CONNECTING;
+                        }
+                        else if (this.subchannelStateCounts[channel_1.ConnectivityState.TRANSIENT_FAILURE] >
+                            0) {
+                            newLBState = channel_1.ConnectivityState.TRANSIENT_FAILURE;
+                        }
+                        else {
+                            newLBState = channel_1.ConnectivityState.IDLE;
+                        }
+                        if (newLBState === channel_1.ConnectivityState.TRANSIENT_FAILURE) {
+                            this.updateState(newLBState, new picker_1.UnavailablePicker());
+                        }
+                        else {
+                            this.updateState(newLBState, new picker_1.QueuePicker(this));
+                        }
+                    }
+                    else {
+                        this.updateState(channel_1.ConnectivityState.CONNECTING, new picker_1.QueuePicker(this));
+                    }
+                }
+                else {
+                    /* We don't need to backoff here because this only happens if a
+                     * subchannel successfully connects then disconnects, so it will not
+                     * create a loop of attempting to connect to an unreachable backend
+                     */
+                    this.updateState(channel_1.ConnectivityState.IDLE, new picker_1.QueuePicker(this));
+                }
+            }
+        };
+        this.connectionDelayTimeout = setTimeout(() => { }, 0);
+        clearTimeout(this.connectionDelayTimeout);
+    }
+    startNextSubchannelConnecting() {
+        if (this.triedAllSubchannels) {
+            return;
+        }
+        for (const [index, subchannel] of this.subchannels.entries()) {
+            if (index > this.currentSubchannelIndex) {
+                const subchannelState = subchannel.getConnectivityState();
+                if (subchannelState === channel_1.ConnectivityState.IDLE ||
+                    subchannelState === channel_1.ConnectivityState.CONNECTING) {
+                    this.startConnecting(index);
+                    return;
+                }
+            }
+        }
+        this.triedAllSubchannels = true;
+    }
+    /**
+     * Have a single subchannel in the `subchannels` list start connecting.
+     * @param subchannelIndex The index into the `subchannels` list.
+     */
+    startConnecting(subchannelIndex) {
+        clearTimeout(this.connectionDelayTimeout);
+        this.currentSubchannelIndex = subchannelIndex;
+        if (this.subchannels[subchannelIndex].getConnectivityState() ===
+            channel_1.ConnectivityState.IDLE) {
+            trace('Start connecting to subchannel with address ' +
+                this.subchannels[subchannelIndex].getAddress());
+            process.nextTick(() => {
+                this.subchannels[subchannelIndex].startConnecting();
+            });
+        }
+        this.connectionDelayTimeout = setTimeout(() => {
+            this.startNextSubchannelConnecting();
+        }, CONNECTION_DELAY_INTERVAL_MS);
+    }
+    pickSubchannel(subchannel) {
+        trace('Pick subchannel with address ' + subchannel.getAddress());
+        if (this.currentPick !== null) {
+            this.currentPick.unref();
+            this.currentPick.removeConnectivityStateListener(this.pickedSubchannelStateListener);
+        }
+        this.currentPick = subchannel;
+        this.updateState(channel_1.ConnectivityState.READY, new PickFirstPicker(subchannel));
+        subchannel.addConnectivityStateListener(this.pickedSubchannelStateListener);
+        subchannel.ref();
+        this.resetSubchannelList();
+        clearTimeout(this.connectionDelayTimeout);
+    }
+    updateState(newState, picker) {
+        trace(channel_1.ConnectivityState[this.currentState] +
+            ' -> ' +
+            channel_1.ConnectivityState[newState]);
+        this.currentState = newState;
+        this.channelControlHelper.updateState(newState, picker);
+    }
+    resetSubchannelList() {
+        for (const subchannel of this.subchannels) {
+            subchannel.removeConnectivityStateListener(this.subchannelStateListener);
+            subchannel.unref();
+        }
+        this.currentSubchannelIndex = 0;
+        this.subchannelStateCounts = {
+            [channel_1.ConnectivityState.CONNECTING]: 0,
+            [channel_1.ConnectivityState.IDLE]: 0,
+            [channel_1.ConnectivityState.READY]: 0,
+            [channel_1.ConnectivityState.SHUTDOWN]: 0,
+            [channel_1.ConnectivityState.TRANSIENT_FAILURE]: 0,
+        };
+        this.subchannels = [];
+        this.triedAllSubchannels = false;
+    }
+    /**
+     * Start connecting to the address list most recently passed to
+     * `updateAddressList`.
+     */
+    connectToAddressList() {
+        this.resetSubchannelList();
+        trace('Connect to address list ' + this.latestAddressList);
+        this.subchannels = this.latestAddressList.map(address => this.channelControlHelper.createSubchannel(address, {}));
+        for (const subchannel of this.subchannels) {
+            subchannel.ref();
+        }
+        for (const subchannel of this.subchannels) {
+            subchannel.addConnectivityStateListener(this.subchannelStateListener);
+            if (subchannel.getConnectivityState() === channel_1.ConnectivityState.READY) {
+                this.pickSubchannel(subchannel);
+                this.resetSubchannelList();
+                return;
+            }
+        }
+        for (const [index, subchannel] of this.subchannels.entries()) {
+            const subchannelState = subchannel.getConnectivityState();
+            if (subchannelState === channel_1.ConnectivityState.IDLE ||
+                subchannelState === channel_1.ConnectivityState.CONNECTING) {
+                this.startConnecting(index);
+                if (this.currentPick === null) {
+                    this.updateState(channel_1.ConnectivityState.CONNECTING, new picker_1.QueuePicker(this));
+                }
+                return;
+            }
+        }
+        // If the code reaches this point, every subchannel must be in TRANSIENT_FAILURE
+        if (this.currentPick === null) {
+            this.updateState(channel_1.ConnectivityState.TRANSIENT_FAILURE, new picker_1.UnavailablePicker());
+        }
+    }
+    updateAddressList(addressList, lbConfig) {
+        // lbConfig has no useful information for pick first load balancing
+        /* To avoid unnecessary churn, we only do something with this address list
+         * if we're not currently trying to establish a connection, or if the new
+         * address list is different from the existing one */
+        if (this.subchannels.length === 0 ||
+            !this.latestAddressList.every((value, index) => addressList[index] === value)) {
+            this.latestAddressList = addressList;
+            this.connectToAddressList();
+        }
+    }
+    exitIdle() {
+        for (const subchannel of this.subchannels) {
+            subchannel.startConnecting();
+        }
+        if (this.currentState === channel_1.ConnectivityState.IDLE) {
+            if (this.latestAddressList.length > 0) {
+                this.connectToAddressList();
+            }
+        }
+        if (this.currentState === channel_1.ConnectivityState.IDLE ||
+            this.triedAllSubchannels) {
+            this.channelControlHelper.requestReresolution();
+        }
+    }
+    resetBackoff() {
+        /* The pick first load balancer does not have a connection backoff, so this
+         * does nothing */
+    }
+    destroy() {
+        this.resetSubchannelList();
+        if (this.currentPick !== null) {
+            this.currentPick.unref();
+            this.currentPick.removeConnectivityStateListener(this.pickedSubchannelStateListener);
+        }
+    }
+    getTypeName() {
+        return TYPE_NAME;
+    }
+    replaceChannelControlHelper(channelControlHelper) {
+        this.channelControlHelper = channelControlHelper;
+    }
+}
+exports.PickFirstLoadBalancer = PickFirstLoadBalancer;
+function setup() {
+    load_balancer_1.registerLoadBalancerType(TYPE_NAME, PickFirstLoadBalancer);
+}
+exports.setup = setup;
+//# sourceMappingURL=load-balancer-pick-first.js.map

node_modules/@grpc/grpc-js/build/src/load-balancer-round-robin.d.ts

@@ -0,0 +1,21 @@
+import { LoadBalancer, ChannelControlHelper } from './load-balancer';
+import { LoadBalancingConfig } from './load-balancing-config';
+export declare class RoundRobinLoadBalancer implements LoadBalancer {
+    private channelControlHelper;
+    private subchannels;
+    private currentState;
+    private subchannelStateListener;
+    private subchannelStateCounts;
+    private currentReadyPicker;
+    constructor(channelControlHelper: ChannelControlHelper);
+    private calculateAndUpdateState;
+    private updateState;
+    private resetSubchannelList;
+    updateAddressList(addressList: string[], lbConfig: LoadBalancingConfig | null): void;
+    exitIdle(): void;
+    resetBackoff(): void;
+    destroy(): void;
+    getTypeName(): string;
+    replaceChannelControlHelper(channelControlHelper: ChannelControlHelper): void;
+}
+export declare function setup(): void;

node_modules/@grpc/grpc-js/build/src/load-balancer-round-robin.js

@@ -0,0 +1,156 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const load_balancer_1 = require("./load-balancer");
+const channel_1 = require("./channel");
+const picker_1 = require("./picker");
+const TYPE_NAME = 'round_robin';
+class RoundRobinPicker {
+    constructor(subchannelList, nextIndex = 0) {
+        this.subchannelList = subchannelList;
+        this.nextIndex = nextIndex;
+    }
+    pick(pickArgs) {
+        const pickedSubchannel = this.subchannelList[this.nextIndex];
+        this.nextIndex = (this.nextIndex + 1) % this.subchannelList.length;
+        return {
+            pickResultType: picker_1.PickResultType.COMPLETE,
+            subchannel: pickedSubchannel,
+            status: null,
+        };
+    }
+    /**
+     * Check what the next subchannel returned would be. Used by the load
+     * balancer implementation to preserve this part of the picker state if
+     * possible when a subchannel connects or disconnects.
+     */
+    peekNextSubchannel() {
+        return this.subchannelList[this.nextIndex];
+    }
+}
+class RoundRobinLoadBalancer {
+    constructor(channelControlHelper) {
+        this.channelControlHelper = channelControlHelper;
+        this.subchannels = [];
+        this.currentState = channel_1.ConnectivityState.IDLE;
+        this.currentReadyPicker = null;
+        this.updateState(channel_1.ConnectivityState.IDLE, new picker_1.QueuePicker(this));
+        this.subchannelStateCounts = {
+            [channel_1.ConnectivityState.CONNECTING]: 0,
+            [channel_1.ConnectivityState.IDLE]: 0,
+            [channel_1.ConnectivityState.READY]: 0,
+            [channel_1.ConnectivityState.SHUTDOWN]: 0,
+            [channel_1.ConnectivityState.TRANSIENT_FAILURE]: 0,
+        };
+        this.subchannelStateListener = (subchannel, previousState, newState) => {
+            this.subchannelStateCounts[previousState] -= 1;
+            this.subchannelStateCounts[newState] += 1;
+            this.calculateAndUpdateState();
+            if (newState === channel_1.ConnectivityState.TRANSIENT_FAILURE) {
+                this.channelControlHelper.requestReresolution();
+            }
+            if (newState === channel_1.ConnectivityState.TRANSIENT_FAILURE ||
+                newState === channel_1.ConnectivityState.IDLE) {
+                subchannel.startConnecting();
+            }
+        };
+    }
+    calculateAndUpdateState() {
+        if (this.subchannelStateCounts[channel_1.ConnectivityState.READY] > 0) {
+            const readySubchannels = this.subchannels.filter(subchannel => subchannel.getConnectivityState() === channel_1.ConnectivityState.READY);
+            let index = 0;
+            if (this.currentReadyPicker !== null) {
+                index = readySubchannels.indexOf(this.currentReadyPicker.peekNextSubchannel());
+                if (index < 0) {
+                    index = 0;
+                }
+            }
+            this.updateState(channel_1.ConnectivityState.READY, new RoundRobinPicker(readySubchannels, index));
+        }
+        else if (this.subchannelStateCounts[channel_1.ConnectivityState.CONNECTING] > 0) {
+            this.updateState(channel_1.ConnectivityState.CONNECTING, new picker_1.QueuePicker(this));
+        }
+        else if (this.subchannelStateCounts[channel_1.ConnectivityState.TRANSIENT_FAILURE] > 0) {
+            this.updateState(channel_1.ConnectivityState.TRANSIENT_FAILURE, new picker_1.UnavailablePicker());
+        }
+        else {
+            this.updateState(channel_1.ConnectivityState.IDLE, new picker_1.QueuePicker(this));
+        }
+    }
+    updateState(newState, picker) {
+        if (newState === channel_1.ConnectivityState.READY) {
+            this.currentReadyPicker = picker;
+        }
+        else {
+            this.currentReadyPicker = null;
+        }
+        this.currentState = newState;
+        this.channelControlHelper.updateState(newState, picker);
+    }
+    resetSubchannelList() {
+        for (const subchannel of this.subchannels) {
+            subchannel.removeConnectivityStateListener(this.subchannelStateListener);
+            subchannel.unref();
+        }
+        this.subchannelStateCounts = {
+            [channel_1.ConnectivityState.CONNECTING]: 0,
+            [channel_1.ConnectivityState.IDLE]: 0,
+            [channel_1.ConnectivityState.READY]: 0,
+            [channel_1.ConnectivityState.SHUTDOWN]: 0,
+            [channel_1.ConnectivityState.TRANSIENT_FAILURE]: 0,
+        };
+        this.subchannels = [];
+    }
+    updateAddressList(addressList, lbConfig) {
+        this.resetSubchannelList();
+        this.subchannels = addressList.map(address => this.channelControlHelper.createSubchannel(address, {}));
+        for (const subchannel of this.subchannels) {
+            const subchannelState = subchannel.getConnectivityState();
+            this.subchannelStateCounts[subchannelState] += 1;
+            if (subchannelState === channel_1.ConnectivityState.IDLE ||
+                subchannelState === channel_1.ConnectivityState.TRANSIENT_FAILURE) {
+                subchannel.startConnecting();
+            }
+        }
+        this.calculateAndUpdateState();
+    }
+    exitIdle() {
+        for (const subchannel of this.subchannels) {
+            subchannel.startConnecting();
+        }
+    }
+    resetBackoff() {
+        /* The pick first load balancer does not have a connection backoff, so this
+         * does nothing */
+    }
+    destroy() {
+        this.resetSubchannelList();
+    }
+    getTypeName() {
+        return TYPE_NAME;
+    }
+    replaceChannelControlHelper(channelControlHelper) {
+        this.channelControlHelper = channelControlHelper;
+    }
+}
+exports.RoundRobinLoadBalancer = RoundRobinLoadBalancer;
+function setup() {
+    load_balancer_1.registerLoadBalancerType(TYPE_NAME, RoundRobinLoadBalancer);
+}
+exports.setup = setup;
+//# sourceMappingURL=load-balancer-round-robin.js.map

node_modules/@grpc/grpc-js/build/src/load-balancer-round-robin.js.map

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node_modules/@grpc/grpc-js/build/src/load-balancer.d.ts

@@ -0,0 +1,78 @@
+import { ChannelOptions } from './channel-options';
+import { Subchannel } from './subchannel';
+import { ConnectivityState } from './channel';
+import { Picker } from './picker';
+import { LoadBalancingConfig } from './load-balancing-config';
+/**
+ * A collection of functions associated with a channel that a load balancer
+ * can call as necessary.
+ */
+export interface ChannelControlHelper {
+    /**
+     * Returns a subchannel connected to the specified address.
+     * @param subchannelAddress The address to connect to
+     * @param subchannelArgs Extra channel arguments specified by the load balancer
+     */
+    createSubchannel(subchannelAddress: string, subchannelArgs: ChannelOptions): Subchannel;
+    /**
+     * Passes a new subchannel picker up to the channel. This is called if either
+     * the connectivity state changes or if a different picker is needed for any
+     * other reason.
+     * @param connectivityState New connectivity state
+     * @param picker New picker
+     */
+    updateState(connectivityState: ConnectivityState, picker: Picker): void;
+    /**
+     * Request new data from the resolver.
+     */
+    requestReresolution(): void;
+}
+/**
+ * Tracks one or more connected subchannels and determines which subchannel
+ * each request should use.
+ */
+export interface LoadBalancer {
+    /**
+     * Gives the load balancer a new list of addresses to start connecting to.
+     * The load balancer will start establishing connections with the new list,
+     * but will continue using any existing connections until the new connections
+     * are established
+     * @param addressList The new list of addresses to connect to
+     * @param lbConfig The load balancing config object from the service config,
+     *     if one was provided
+     */
+    updateAddressList(addressList: string[], lbConfig: LoadBalancingConfig | null): void;
+    /**
+     * If the load balancer is currently in the IDLE state, start connecting.
+     */
+    exitIdle(): void;
+    /**
+     * If the load balancer is currently in the CONNECTING or TRANSIENT_FAILURE
+     * state, reset the current connection backoff timeout to its base value and
+     * transition to CONNECTING if in TRANSIENT_FAILURE.
+     */
+    resetBackoff(): void;
+    /**
+     * The load balancer unrefs all of its subchannels and stops calling methods
+     * of its channel control helper.
+     */
+    destroy(): void;
+    /**
+     * Get the type name for this load balancer type. Must be constant across an
+     * entire load balancer implementation class and must match the name that the
+     * balancer implementation class was registered with.
+     */
+    getTypeName(): string;
+    /**
+     * Replace the existing ChannelControlHelper with a new one
+     * @param channelControlHelper The new ChannelControlHelper to use from now on
+     */
+    replaceChannelControlHelper(channelControlHelper: ChannelControlHelper): void;
+}
+export interface LoadBalancerConstructor {
+    new (channelControlHelper: ChannelControlHelper): LoadBalancer;
+}
+export declare function registerLoadBalancerType(typeName: string, loadBalancerType: LoadBalancerConstructor): void;
+export declare function createLoadBalancer(typeName: string, channelControlHelper: ChannelControlHelper): LoadBalancer | null;
+export declare function isLoadBalancerNameRegistered(typeName: string): boolean;
+export declare function registerAll(): void;

node_modules/@grpc/grpc-js/build/src/load-balancer.js

@@ -0,0 +1,44 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const load_balancer_pick_first = require("./load-balancer-pick-first");
+const load_balancer_round_robin = require("./load-balancer-round-robin");
+const registeredLoadBalancerTypes = {};
+function registerLoadBalancerType(typeName, loadBalancerType) {
+    registeredLoadBalancerTypes[typeName] = loadBalancerType;
+}
+exports.registerLoadBalancerType = registerLoadBalancerType;
+function createLoadBalancer(typeName, channelControlHelper) {
+    if (typeName in registeredLoadBalancerTypes) {
+        return new registeredLoadBalancerTypes[typeName](channelControlHelper);
+    }
+    else {
+        return null;
+    }
+}
+exports.createLoadBalancer = createLoadBalancer;
+function isLoadBalancerNameRegistered(typeName) {
+    return typeName in registeredLoadBalancerTypes;
+}
+exports.isLoadBalancerNameRegistered = isLoadBalancerNameRegistered;
+function registerAll() {
+    load_balancer_pick_first.setup();
+    load_balancer_round_robin.setup();
+}
+exports.registerAll = registerAll;
+//# sourceMappingURL=load-balancer.js.map

node_modules/@grpc/grpc-js/build/src/load-balancer.js.map

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node_modules/@grpc/grpc-js/build/src/load-balancing-config.d.ts

@@ -0,0 +1,16 @@
+export interface RoundRobinConfig {
+}
+export interface XdsConfig {
+    balancerName: string;
+    childPolicy: LoadBalancingConfig[];
+    fallbackPolicy: LoadBalancingConfig[];
+}
+export interface GrpcLbConfig {
+    childPolicy: LoadBalancingConfig[];
+}
+export interface LoadBalancingConfig {
+    round_robin?: RoundRobinConfig;
+    xds?: XdsConfig;
+    grpclb?: GrpcLbConfig;
+}
+export declare function validateConfig(obj: any): LoadBalancingConfig;

node_modules/@grpc/grpc-js/build/src/load-balancing-config.js

@@ -0,0 +1,84 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+/* In these functions we assume the input came from a JSON object. Therefore we
+ * expect that the prototype is uninteresting and that `in` can be used
+ * effectively */
+function validateXdsConfig(xds) {
+    if (!('balancerName' in xds) || typeof xds.balancerName !== 'string') {
+        throw new Error('Invalid xds config: invalid balancerName');
+    }
+    const xdsConfig = {
+        balancerName: xds.balancerName,
+        childPolicy: [],
+        fallbackPolicy: [],
+    };
+    if ('childPolicy' in xds) {
+        if (!Array.isArray(xds.childPolicy)) {
+            throw new Error('Invalid xds config: invalid childPolicy');
+        }
+        for (const policy of xds.childPolicy) {
+            xdsConfig.childPolicy.push(validateConfig(policy));
+        }
+    }
+    if ('fallbackPolicy' in xds) {
+        if (!Array.isArray(xds.fallbackPolicy)) {
+            throw new Error('Invalid xds config: invalid fallbackPolicy');
+        }
+        for (const policy of xds.fallbackPolicy) {
+            xdsConfig.fallbackPolicy.push(validateConfig(policy));
+        }
+    }
+    return xdsConfig;
+}
+function validateGrpcLbConfig(grpclb) {
+    const grpcLbConfig = {
+        childPolicy: [],
+    };
+    if ('childPolicy' in grpclb) {
+        if (!Array.isArray(grpclb.childPolicy)) {
+            throw new Error('Invalid xds config: invalid childPolicy');
+        }
+        for (const policy of grpclb.childPolicy) {
+            grpcLbConfig.childPolicy.push(validateConfig(policy));
+        }
+    }
+    return grpcLbConfig;
+}
+function validateConfig(obj) {
+    if ('round_robin' in obj) {
+        if ('xds' in obj || 'grpclb' in obj) {
+            throw new Error('Multiple load balancing policies configured');
+        }
+        if (obj['round_robin'] instanceof Object) {
+            return { round_robin: {} };
+        }
+    }
+    if ('xds' in obj) {
+        if ('grpclb' in obj) {
+            throw new Error('Multiple load balancing policies configured');
+        }
+        return { xds: validateXdsConfig(obj.xds) };
+    }
+    if ('grpclb' in obj) {
+        return { grpclb: validateGrpcLbConfig(obj.grpclb) };
+    }
+    throw new Error('No recognized load balancing policy configured');
+}
+exports.validateConfig = validateConfig;
+//# sourceMappingURL=load-balancing-config.js.map

node_modules/@grpc/grpc-js/build/src/load-balancing-config.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/logging.d.ts

@@ -0,0 +1,7 @@
+/// <reference types="node" />
+import { LogVerbosity } from './constants';
+export declare const getLogger: () => Partial<Console>;
+export declare const setLogger: (logger: Partial<Console>) => void;
+export declare const setLoggerVerbosity: (verbosity: LogVerbosity) => void;
+export declare const log: (severity: LogVerbosity, ...args: any[]) => void;
+export declare function trace(severity: LogVerbosity, tracer: string, text: string): void;

node_modules/@grpc/grpc-js/build/src/logging.js

@@ -0,0 +1,62 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const constants_1 = require("./constants");
+let _logger = console;
+let _logVerbosity = constants_1.LogVerbosity.ERROR;
+if (process.env.GRPC_VERBOSITY) {
+    switch (process.env.GRPC_VERBOSITY) {
+        case 'DEBUG':
+            _logVerbosity = constants_1.LogVerbosity.DEBUG;
+            break;
+        case 'INFO':
+            _logVerbosity = constants_1.LogVerbosity.INFO;
+            break;
+        case 'ERROR':
+            _logVerbosity = constants_1.LogVerbosity.ERROR;
+            break;
+        default:
+        // Ignore any other values
+    }
+}
+exports.getLogger = () => {
+    return _logger;
+};
+exports.setLogger = (logger) => {
+    _logger = logger;
+};
+exports.setLoggerVerbosity = (verbosity) => {
+    _logVerbosity = verbosity;
+};
+// tslint:disable-next-line no-any
+exports.log = (severity, ...args) => {
+    if (severity >= _logVerbosity && typeof _logger.error === 'function') {
+        _logger.error(...args);
+    }
+};
+const enabledTracers = process.env.GRPC_TRACE
+    ? process.env.GRPC_TRACE.split(',')
+    : [];
+const allEnabled = enabledTracers.includes('all');
+function trace(severity, tracer, text) {
+    if (allEnabled || enabledTracers.includes(tracer)) {
+        exports.log(severity, new Date().toISOString() + ' | ' + tracer + ' | ' + text);
+    }
+}
+exports.trace = trace;
+//# sourceMappingURL=logging.js.map

node_modules/@grpc/grpc-js/build/src/logging.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/make-client.d.ts

@@ -0,0 +1,62 @@
+/// <reference types="node" />
+import { ChannelCredentials } from './channel-credentials';
+import { ChannelOptions } from './channel-options';
+import { Client } from './client';
+export interface Serialize<T> {
+    (value: T): Buffer;
+}
+export interface Deserialize<T> {
+    (bytes: Buffer): T;
+}
+export interface MethodDefinition<RequestType, ResponseType> {
+    path: string;
+    requestStream: boolean;
+    responseStream: boolean;
+    requestSerialize: Serialize<RequestType>;
+    responseSerialize: Serialize<ResponseType>;
+    requestDeserialize: Deserialize<RequestType>;
+    responseDeserialize: Deserialize<ResponseType>;
+    originalName?: string;
+}
+export interface ServiceDefinition {
+    [index: string]: MethodDefinition<any, any>;
+}
+export interface ProtobufTypeDefinition {
+    format: string;
+    type: object;
+    fileDescriptorProtos: Buffer[];
+}
+export interface PackageDefinition {
+    [index: string]: ServiceDefinition | ProtobufTypeDefinition;
+}
+export interface ServiceClient extends Client {
+    [methodName: string]: Function;
+}
+export interface ServiceClientConstructor {
+    new (address: string, credentials: ChannelCredentials, options?: Partial<ChannelOptions>): ServiceClient;
+    service: ServiceDefinition;
+}
+/**
+ * Creates a constructor for a client with the given methods, as specified in
+ * the methods argument. The resulting class will have an instance method for
+ * each method in the service, which is a partial application of one of the
+ * [Client]{@link grpc.Client} request methods, depending on `requestSerialize`
+ * and `responseSerialize`, with the `method`, `serialize`, and `deserialize`
+ * arguments predefined.
+ * @param methods An object mapping method names to
+ *     method attributes
+ * @param serviceName The fully qualified name of the service
+ * @param classOptions An options object.
+ * @return New client constructor, which is a subclass of
+ *     {@link grpc.Client}, and has the same arguments as that constructor.
+ */
+export declare function makeClientConstructor(methods: ServiceDefinition, serviceName: string, classOptions?: {}): ServiceClientConstructor;
+export interface GrpcObject {
+    [index: string]: GrpcObject | ServiceClientConstructor | ProtobufTypeDefinition;
+}
+/**
+ * Load a gRPC package definition as a gRPC object hierarchy.
+ * @param packageDef The package definition object.
+ * @return The resulting gRPC object.
+ */
+export declare function loadPackageDefinition(packageDef: PackageDefinition): GrpcObject;

node_modules/@grpc/grpc-js/build/src/make-client.js

@@ -0,0 +1,128 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const client_1 = require("./client");
+/**
+ * Map with short names for each of the requester maker functions. Used in
+ * makeClientConstructor
+ * @private
+ */
+const requesterFuncs = {
+    unary: client_1.Client.prototype.makeUnaryRequest,
+    server_stream: client_1.Client.prototype.makeServerStreamRequest,
+    client_stream: client_1.Client.prototype.makeClientStreamRequest,
+    bidi: client_1.Client.prototype.makeBidiStreamRequest,
+};
+/**
+ * Creates a constructor for a client with the given methods, as specified in
+ * the methods argument. The resulting class will have an instance method for
+ * each method in the service, which is a partial application of one of the
+ * [Client]{@link grpc.Client} request methods, depending on `requestSerialize`
+ * and `responseSerialize`, with the `method`, `serialize`, and `deserialize`
+ * arguments predefined.
+ * @param methods An object mapping method names to
+ *     method attributes
+ * @param serviceName The fully qualified name of the service
+ * @param classOptions An options object.
+ * @return New client constructor, which is a subclass of
+ *     {@link grpc.Client}, and has the same arguments as that constructor.
+ */
+function makeClientConstructor(methods, serviceName, classOptions) {
+    if (!classOptions) {
+        classOptions = {};
+    }
+    class ServiceClientImpl extends client_1.Client {
+    }
+    Object.keys(methods).forEach(name => {
+        const attrs = methods[name];
+        let methodType;
+        // TODO(murgatroid99): Verify that we don't need this anymore
+        if (typeof name === 'string' && name.charAt(0) === '$') {
+            throw new Error('Method names cannot start with $');
+        }
+        if (attrs.requestStream) {
+            if (attrs.responseStream) {
+                methodType = 'bidi';
+            }
+            else {
+                methodType = 'client_stream';
+            }
+        }
+        else {
+            if (attrs.responseStream) {
+                methodType = 'server_stream';
+            }
+            else {
+                methodType = 'unary';
+            }
+        }
+        const serialize = attrs.requestSerialize;
+        const deserialize = attrs.responseDeserialize;
+        const methodFunc = partial(requesterFuncs[methodType], attrs.path, serialize, deserialize);
+        ServiceClientImpl.prototype[name] = methodFunc;
+        // Associate all provided attributes with the method
+        Object.assign(ServiceClientImpl.prototype[name], attrs);
+        if (attrs.originalName) {
+            ServiceClientImpl.prototype[attrs.originalName] =
+                ServiceClientImpl.prototype[name];
+        }
+    });
+    ServiceClientImpl.service = methods;
+    return ServiceClientImpl;
+}
+exports.makeClientConstructor = makeClientConstructor;
+function partial(fn, path, serialize, deserialize) {
+    // tslint:disable-next-line:no-any
+    return function (...args) {
+        return fn.call(this, path, serialize, deserialize, ...args);
+    };
+}
+function isProtobufTypeDefinition(obj) {
+    return 'format' in obj;
+}
+/**
+ * Load a gRPC package definition as a gRPC object hierarchy.
+ * @param packageDef The package definition object.
+ * @return The resulting gRPC object.
+ */
+function loadPackageDefinition(packageDef) {
+    const result = {};
+    for (const serviceFqn in packageDef) {
+        if (packageDef.hasOwnProperty(serviceFqn)) {
+            const service = packageDef[serviceFqn];
+            const nameComponents = serviceFqn.split('.');
+            const serviceName = nameComponents[nameComponents.length - 1];
+            let current = result;
+            for (const packageName of nameComponents.slice(0, -1)) {
+                if (!current[packageName]) {
+                    current[packageName] = {};
+                }
+                current = current[packageName];
+            }
+            if (isProtobufTypeDefinition(service)) {
+                current[serviceName] = service;
+            }
+            else {
+                current[serviceName] = makeClientConstructor(service, serviceName, {});
+            }
+        }
+    }
+    return result;
+}
+exports.loadPackageDefinition = loadPackageDefinition;
+//# sourceMappingURL=make-client.js.map

node_modules/@grpc/grpc-js/build/src/make-client.js.map

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node_modules/@grpc/grpc-js/build/src/metadata-status-filter.d.ts

@@ -0,0 +1,12 @@
+import { Call } from './call-stream';
+import { StatusObject } from './call-stream';
+import { Channel } from './channel';
+import { BaseFilter, Filter, FilterFactory } from './filter';
+export declare class MetadataStatusFilter extends BaseFilter implements Filter {
+    receiveTrailers(status: Promise<StatusObject>): Promise<StatusObject>;
+}
+export declare class MetadataStatusFilterFactory implements FilterFactory<MetadataStatusFilter> {
+    private readonly channel;
+    constructor(channel: Channel);
+    createFilter(callStream: Call): MetadataStatusFilter;
+}

node_modules/@grpc/grpc-js/build/src/metadata-status-filter.js

@@ -0,0 +1,54 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const constants_1 = require("./constants");
+const filter_1 = require("./filter");
+class MetadataStatusFilter extends filter_1.BaseFilter {
+    async receiveTrailers(status) {
+        // tslint:disable-next-line:prefer-const
+        let { code, details, metadata } = await status;
+        if (code !== constants_1.Status.UNKNOWN) {
+            // we already have a known status, so don't assign a new one.
+            return { code, details, metadata };
+        }
+        const metadataMap = metadata.getMap();
+        if (typeof metadataMap['grpc-status'] === 'string') {
+            const receivedCode = Number(metadataMap['grpc-status']);
+            if (receivedCode in constants_1.Status) {
+                code = receivedCode;
+            }
+            metadata.remove('grpc-status');
+        }
+        if (typeof metadataMap['grpc-message'] === 'string') {
+            details = decodeURI(metadataMap['grpc-message']);
+            metadata.remove('grpc-message');
+        }
+        return { code, details, metadata };
+    }
+}
+exports.MetadataStatusFilter = MetadataStatusFilter;
+class MetadataStatusFilterFactory {
+    constructor(channel) {
+        this.channel = channel;
+    }
+    createFilter(callStream) {
+        return new MetadataStatusFilter();
+    }
+}
+exports.MetadataStatusFilterFactory = MetadataStatusFilterFactory;
+//# sourceMappingURL=metadata-status-filter.js.map

node_modules/@grpc/grpc-js/build/src/metadata-status-filter.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/metadata.d.ts

@@ -0,0 +1,79 @@
+/// <reference types="node" />
+import * as http2 from 'http2';
+export declare type MetadataValue = string | Buffer;
+export declare type MetadataObject = Map<string, MetadataValue[]>;
+export interface MetadataOptions {
+    idempotentRequest?: boolean;
+    waitForReady?: boolean;
+    cacheableRequest?: boolean;
+    corked?: boolean;
+}
+/**
+ * A class for storing metadata. Keys are normalized to lowercase ASCII.
+ */
+export declare class Metadata {
+    protected internalRepr: MetadataObject;
+    private options;
+    constructor(options?: MetadataOptions);
+    /**
+     * Sets the given value for the given key by replacing any other values
+     * associated with that key. Normalizes the key.
+     * @param key The key to whose value should be set.
+     * @param value The value to set. Must be a buffer if and only
+     *   if the normalized key ends with '-bin'.
+     */
+    set(key: string, value: MetadataValue): void;
+    /**
+     * Adds the given value for the given key by appending to a list of previous
+     * values associated with that key. Normalizes the key.
+     * @param key The key for which a new value should be appended.
+     * @param value The value to add. Must be a buffer if and only
+     *   if the normalized key ends with '-bin'.
+     */
+    add(key: string, value: MetadataValue): void;
+    /**
+     * Removes the given key and any associated values. Normalizes the key.
+     * @param key The key whose values should be removed.
+     */
+    remove(key: string): void;
+    /**
+     * Gets a list of all values associated with the key. Normalizes the key.
+     * @param key The key whose value should be retrieved.
+     * @return A list of values associated with the given key.
+     */
+    get(key: string): MetadataValue[];
+    /**
+     * Gets a plain object mapping each key to the first value associated with it.
+     * This reflects the most common way that people will want to see metadata.
+     * @return A key/value mapping of the metadata.
+     */
+    getMap(): {
+        [key: string]: MetadataValue;
+    };
+    /**
+     * Clones the metadata object.
+     * @return The newly cloned object.
+     */
+    clone(): Metadata;
+    /**
+     * Merges all key-value pairs from a given Metadata object into this one.
+     * If both this object and the given object have values in the same key,
+     * values from the other Metadata object will be appended to this object's
+     * values.
+     * @param other A Metadata object.
+     */
+    merge(other: Metadata): void;
+    setOptions(options: MetadataOptions): void;
+    getOptions(): MetadataOptions;
+    /**
+     * Creates an OutgoingHttpHeaders object that can be used with the http2 API.
+     */
+    toHttp2Headers(): http2.OutgoingHttpHeaders;
+    private _getCoreRepresentation;
+    /**
+     * Returns a new Metadata object based fields in a given IncomingHttpHeaders
+     * object.
+     * @param headers An IncomingHttpHeaders object.
+     */
+    static fromHttp2Headers(headers: http2.IncomingHttpHeaders): Metadata;
+}

node_modules/@grpc/grpc-js/build/src/metadata.js

@@ -0,0 +1,254 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const logging_1 = require("./logging");
+const constants_1 = require("./constants");
+const LEGAL_KEY_REGEX = /^[0-9a-z_.-]+$/;
+const LEGAL_NON_BINARY_VALUE_REGEX = /^[ -~]*$/;
+function isLegalKey(key) {
+    return LEGAL_KEY_REGEX.test(key);
+}
+function isLegalNonBinaryValue(value) {
+    return LEGAL_NON_BINARY_VALUE_REGEX.test(value);
+}
+function isBinaryKey(key) {
+    return key.endsWith('-bin');
+}
+function isCustomMetadata(key) {
+    return !key.startsWith('grpc-');
+}
+function normalizeKey(key) {
+    return key.toLowerCase();
+}
+function validate(key, value) {
+    if (!isLegalKey(key)) {
+        throw new Error('Metadata key "' + key + '" contains illegal characters');
+    }
+    if (value != null) {
+        if (isBinaryKey(key)) {
+            if (!(value instanceof Buffer)) {
+                throw new Error("keys that end with '-bin' must have Buffer values");
+            }
+        }
+        else {
+            if (value instanceof Buffer) {
+                throw new Error("keys that don't end with '-bin' must have String values");
+            }
+            if (!isLegalNonBinaryValue(value)) {
+                throw new Error('Metadata string value "' + value + '" contains illegal characters');
+            }
+        }
+    }
+}
+/**
+ * A class for storing metadata. Keys are normalized to lowercase ASCII.
+ */
+class Metadata {
+    constructor(options) {
+        this.internalRepr = new Map();
+        if (options === undefined) {
+            this.options = {};
+        }
+        else {
+            this.options = options;
+        }
+    }
+    /**
+     * Sets the given value for the given key by replacing any other values
+     * associated with that key. Normalizes the key.
+     * @param key The key to whose value should be set.
+     * @param value The value to set. Must be a buffer if and only
+     *   if the normalized key ends with '-bin'.
+     */
+    set(key, value) {
+        key = normalizeKey(key);
+        validate(key, value);
+        this.internalRepr.set(key, [value]);
+    }
+    /**
+     * Adds the given value for the given key by appending to a list of previous
+     * values associated with that key. Normalizes the key.
+     * @param key The key for which a new value should be appended.
+     * @param value The value to add. Must be a buffer if and only
+     *   if the normalized key ends with '-bin'.
+     */
+    add(key, value) {
+        key = normalizeKey(key);
+        validate(key, value);
+        const existingValue = this.internalRepr.get(key);
+        if (existingValue === undefined) {
+            this.internalRepr.set(key, [value]);
+        }
+        else {
+            existingValue.push(value);
+        }
+    }
+    /**
+     * Removes the given key and any associated values. Normalizes the key.
+     * @param key The key whose values should be removed.
+     */
+    remove(key) {
+        key = normalizeKey(key);
+        validate(key);
+        this.internalRepr.delete(key);
+    }
+    /**
+     * Gets a list of all values associated with the key. Normalizes the key.
+     * @param key The key whose value should be retrieved.
+     * @return A list of values associated with the given key.
+     */
+    get(key) {
+        key = normalizeKey(key);
+        validate(key);
+        return this.internalRepr.get(key) || [];
+    }
+    /**
+     * Gets a plain object mapping each key to the first value associated with it.
+     * This reflects the most common way that people will want to see metadata.
+     * @return A key/value mapping of the metadata.
+     */
+    getMap() {
+        const result = {};
+        this.internalRepr.forEach((values, key) => {
+            if (values.length > 0) {
+                const v = values[0];
+                result[key] = v instanceof Buffer ? v.slice() : v;
+            }
+        });
+        return result;
+    }
+    /**
+     * Clones the metadata object.
+     * @return The newly cloned object.
+     */
+    clone() {
+        const newMetadata = new Metadata();
+        const newInternalRepr = newMetadata.internalRepr;
+        this.internalRepr.forEach((value, key) => {
+            const clonedValue = value.map(v => {
+                if (v instanceof Buffer) {
+                    return Buffer.from(v);
+                }
+                else {
+                    return v;
+                }
+            });
+            newInternalRepr.set(key, clonedValue);
+        });
+        return newMetadata;
+    }
+    /**
+     * Merges all key-value pairs from a given Metadata object into this one.
+     * If both this object and the given object have values in the same key,
+     * values from the other Metadata object will be appended to this object's
+     * values.
+     * @param other A Metadata object.
+     */
+    merge(other) {
+        other.internalRepr.forEach((values, key) => {
+            const mergedValue = (this.internalRepr.get(key) || []).concat(values);
+            this.internalRepr.set(key, mergedValue);
+        });
+    }
+    setOptions(options) {
+        this.options = options;
+    }
+    getOptions() {
+        return this.options;
+    }
+    /**
+     * Creates an OutgoingHttpHeaders object that can be used with the http2 API.
+     */
+    toHttp2Headers() {
+        // NOTE: Node <8.9 formats http2 headers incorrectly.
+        const result = {};
+        this.internalRepr.forEach((values, key) => {
+            // We assume that the user's interaction with this object is limited to
+            // through its public API (i.e. keys and values are already validated).
+            result[key] = values.map(value => {
+                if (value instanceof Buffer) {
+                    return value.toString('base64');
+                }
+                else {
+                    return value;
+                }
+            });
+        });
+        return result;
+    }
+    // For compatibility with the other Metadata implementation
+    _getCoreRepresentation() {
+        return this.internalRepr;
+    }
+    /**
+     * Returns a new Metadata object based fields in a given IncomingHttpHeaders
+     * object.
+     * @param headers An IncomingHttpHeaders object.
+     */
+    static fromHttp2Headers(headers) {
+        const result = new Metadata();
+        Object.keys(headers).forEach(key => {
+            // Reserved headers (beginning with `:`) are not valid keys.
+            if (key.charAt(0) === ':') {
+                return;
+            }
+            const values = headers[key];
+            try {
+                if (isBinaryKey(key)) {
+                    if (Array.isArray(values)) {
+                        values.forEach(value => {
+                            result.add(key, Buffer.from(value, 'base64'));
+                        });
+                    }
+                    else if (values !== undefined) {
+                        if (isCustomMetadata(key)) {
+                            values.split(',').forEach(v => {
+                                result.add(key, Buffer.from(v.trim(), 'base64'));
+                            });
+                        }
+                        else {
+                            result.add(key, Buffer.from(values, 'base64'));
+                        }
+                    }
+                }
+                else {
+                    if (Array.isArray(values)) {
+                        values.forEach(value => {
+                            result.add(key, value);
+                        });
+                    }
+                    else if (values !== undefined) {
+                        if (isCustomMetadata(key)) {
+                            values.split(',').forEach(v => result.add(key, v.trim()));
+                        }
+                        else {
+                            result.add(key, values);
+                        }
+                    }
+                }
+            }
+            catch (error) {
+                const message = `Failed to add metadata entry ${key}: ${values}. ${error.message}. For more information see https://github.com/grpc/grpc-node/issues/1173`;
+                logging_1.log(constants_1.LogVerbosity.ERROR, message);
+            }
+        });
+        return result;
+    }
+}
+exports.Metadata = Metadata;
+//# sourceMappingURL=metadata.js.map

node_modules/@grpc/grpc-js/build/src/object-stream.d.ts

@@ -0,0 +1,37 @@
+/// <reference types="node" />
+import { Duplex, Readable, Writable } from 'stream';
+import { EmitterAugmentation1 } from './events';
+export declare type WriteCallback = (error: Error | null | undefined) => void;
+export interface IntermediateObjectReadable<T> extends Readable {
+    read(size?: number): any & T;
+}
+export declare type ObjectReadable<T> = {
+    read(size?: number): T;
+} & EmitterAugmentation1<'data', T> & IntermediateObjectReadable<T>;
+export interface IntermediateObjectWritable<T> extends Writable {
+    _write(chunk: any & T, encoding: string, callback: Function): void;
+    write(chunk: any & T, cb?: WriteCallback): boolean;
+    write(chunk: any & T, encoding?: any, cb?: WriteCallback): boolean;
+    setDefaultEncoding(encoding: string): this;
+    end(): void;
+    end(chunk: any & T, cb?: Function): void;
+    end(chunk: any & T, encoding?: any, cb?: Function): void;
+}
+export interface ObjectWritable<T> extends IntermediateObjectWritable<T> {
+    _write(chunk: T, encoding: string, callback: Function): void;
+    write(chunk: T, cb?: Function): boolean;
+    write(chunk: T, encoding?: any, cb?: Function): boolean;
+    setDefaultEncoding(encoding: string): this;
+    end(): void;
+    end(chunk: T, cb?: Function): void;
+    end(chunk: T, encoding?: any, cb?: Function): void;
+}
+export declare type ObjectDuplex<T, U> = {
+    read(size?: number): U;
+    _write(chunk: T, encoding: string, callback: Function): void;
+    write(chunk: T, cb?: Function): boolean;
+    write(chunk: T, encoding?: any, cb?: Function): boolean;
+    end(): void;
+    end(chunk: T, cb?: Function): void;
+    end(chunk: T, encoding?: any, cb?: Function): void;
+} & Duplex & ObjectWritable<T> & ObjectReadable<U>;

node_modules/@grpc/grpc-js/build/src/object-stream.js

@@ -0,0 +1,19 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+//# sourceMappingURL=object-stream.js.map

node_modules/@grpc/grpc-js/build/src/object-stream.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"object-stream.js","sourceRoot":"","sources":["../../src/object-stream.ts"],"names":[],"mappings":";AAAA;;;;;;;;;;;;;;;GAeG"}

node_modules/@grpc/grpc-js/build/src/picker.d.ts

@@ -0,0 +1,71 @@
+import { Subchannel } from './subchannel';
+import { StatusObject } from './call-stream';
+import { Metadata } from './metadata';
+import { LoadBalancer } from './load-balancer';
+export declare enum PickResultType {
+    COMPLETE = 0,
+    QUEUE = 1,
+    TRANSIENT_FAILURE = 2
+}
+export interface PickResult {
+    pickResultType: PickResultType;
+    /**
+     * The subchannel to use as the transport for the call. Only meaningful if
+     * `pickResultType` is COMPLETE. If null, indicates that the call should be
+     * dropped.
+     */
+    subchannel: Subchannel | null;
+    /**
+     * The status object to end the call with. Populated if and only if
+     * `pickResultType` is TRANSIENT_FAILURE.
+     */
+    status: StatusObject | null;
+}
+export interface CompletePickResult extends PickResult {
+    pickResultType: PickResultType.COMPLETE;
+    subchannel: Subchannel | null;
+    status: null;
+}
+export interface QueuePickResult extends PickResult {
+    pickResultType: PickResultType.QUEUE;
+    subchannel: null;
+    status: null;
+}
+export interface TransientFailurePickResult extends PickResult {
+    pickResultType: PickResultType.TRANSIENT_FAILURE;
+    subchannel: null;
+    status: StatusObject;
+}
+export interface PickArgs {
+    metadata: Metadata;
+}
+/**
+ * A proxy object representing the momentary state of a load balancer. Picks
+ * subchannels or returns other information based on that state. Should be
+ * replaced every time the load balancer changes state.
+ */
+export interface Picker {
+    pick(pickArgs: PickArgs): PickResult;
+}
+/**
+ * A standard picker representing a load balancer in the TRANSIENT_FAILURE
+ * state. Always responds to every pick request with an UNAVAILABLE status.
+ */
+export declare class UnavailablePicker implements Picker {
+    private status;
+    constructor(status?: StatusObject);
+    pick(pickArgs: PickArgs): TransientFailurePickResult;
+}
+/**
+ * A standard picker representing a load balancer in the IDLE or CONNECTING
+ * state. Always responds to every pick request with a QUEUE pick result
+ * indicating that the pick should be tried again with the next `Picker`. Also
+ * reports back to the load balancer that a connection should be established
+ * once any pick is attempted.
+ */
+export declare class QueuePicker {
+    private loadBalancer;
+    private calledExitIdle;
+    constructor(loadBalancer: LoadBalancer);
+    pick(pickArgs: PickArgs): QueuePickResult;
+}

node_modules/@grpc/grpc-js/build/src/picker.js

@@ -0,0 +1,81 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const metadata_1 = require("./metadata");
+const constants_1 = require("./constants");
+var PickResultType;
+(function (PickResultType) {
+    PickResultType[PickResultType["COMPLETE"] = 0] = "COMPLETE";
+    PickResultType[PickResultType["QUEUE"] = 1] = "QUEUE";
+    PickResultType[PickResultType["TRANSIENT_FAILURE"] = 2] = "TRANSIENT_FAILURE";
+})(PickResultType = exports.PickResultType || (exports.PickResultType = {}));
+/**
+ * A standard picker representing a load balancer in the TRANSIENT_FAILURE
+ * state. Always responds to every pick request with an UNAVAILABLE status.
+ */
+class UnavailablePicker {
+    constructor(status) {
+        if (status !== undefined) {
+            this.status = status;
+        }
+        else {
+            this.status = {
+                code: constants_1.Status.UNAVAILABLE,
+                details: 'No connection established',
+                metadata: new metadata_1.Metadata(),
+            };
+        }
+    }
+    pick(pickArgs) {
+        return {
+            pickResultType: PickResultType.TRANSIENT_FAILURE,
+            subchannel: null,
+            status: this.status,
+        };
+    }
+}
+exports.UnavailablePicker = UnavailablePicker;
+/**
+ * A standard picker representing a load balancer in the IDLE or CONNECTING
+ * state. Always responds to every pick request with a QUEUE pick result
+ * indicating that the pick should be tried again with the next `Picker`. Also
+ * reports back to the load balancer that a connection should be established
+ * once any pick is attempted.
+ */
+class QueuePicker {
+    // Constructed with a load balancer. Calls exitIdle on it the first time pick is called
+    constructor(loadBalancer) {
+        this.loadBalancer = loadBalancer;
+        this.calledExitIdle = false;
+    }
+    pick(pickArgs) {
+        if (!this.calledExitIdle) {
+            process.nextTick(() => {
+                this.loadBalancer.exitIdle();
+            });
+            this.calledExitIdle = true;
+        }
+        return {
+            pickResultType: PickResultType.QUEUE,
+            subchannel: null,
+            status: null,
+        };
+    }
+}
+exports.QueuePicker = QueuePicker;
+//# sourceMappingURL=picker.js.map

node_modules/@grpc/grpc-js/build/src/picker.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/resolver-dns.d.ts

@@ -0,0 +1,5 @@
+/**
+ * Set up the DNS resolver class by registering it as the handler for the
+ * "dns:" prefix and as the default resolver.
+ */
+export declare function setup(): void;

node_modules/@grpc/grpc-js/build/src/resolver-dns.js

@@ -0,0 +1,269 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const resolver_1 = require("./resolver");
+const dns = require("dns");
+const semver = require("semver");
+const util = require("util");
+const service_config_1 = require("./service-config");
+const constants_1 = require("./constants");
+const metadata_1 = require("./metadata");
+const logging = require("./logging");
+const constants_2 = require("./constants");
+const TRACER_NAME = 'dns_resolver';
+function trace(text) {
+    logging.trace(constants_2.LogVerbosity.DEBUG, TRACER_NAME, text);
+}
+/* These regular expressions match IP addresses with optional ports in different
+ * formats. In each case, capture group 1 contains the address, and capture
+ * group 2 contains the port number, if present */
+/**
+ * Matches 4 groups of up to 3 digits each, separated by periods, optionally
+ * followed by a colon and a number.
+ */
+const IPV4_REGEX = /^(\d{1,3}(?:\.\d{1,3}){3})(?::(\d+))?$/;
+/**
+ * Matches any number of groups of up to 4 hex digits (case insensitive)
+ * separated by 1 or more colons. This variant does not match a port number.
+ */
+const IPV6_REGEX = /^([0-9a-f]{0,4}(?::{1,2}[0-9a-f]{0,4})+)$/i;
+/**
+ * Matches the same as the IPv6_REGEX, surrounded by square brackets, and
+ * optionally followed by a colon and a number.
+ */
+const IPV6_BRACKET_REGEX = /^\[([0-9a-f]{0,4}(?::{1,2}[0-9a-f]{0,4})+)\](?::(\d+))?$/i;
+/**
+ * Matches `[dns:][//authority/]host[:port]`, where `authority` and `host` are
+ * both arbitrary sequences of dot-separated strings of alphanumeric characters
+ * and `port` is a sequence of digits. Group 1 contains the hostname and group
+ * 2 contains the port number if provided.
+ */
+const DNS_REGEX = /^(?:dns:)?(?:\/\/(?:[a-zA-Z0-9-]+\.?)+\/)?((?:[a-zA-Z0-9-]+\.?)+)(?::(\d+))?$/;
+/**
+ * The default TCP port to connect to if not explicitly specified in the target.
+ */
+const DEFAULT_PORT = '443';
+/**
+ * The range of Node versions in which the Node issue
+ * https://github.com/nodejs/node/issues/28216 has been fixed. In other
+ * versions, IPv6 literal addresses cannot be used to establish HTTP/2
+ * connections.
+ */
+const IPV6_SUPPORT_RANGE = '>= 12.6';
+/**
+ * Get a promise that always resolves with either the result of the function
+ * or the error if it failed.
+ * @param fn
+ */
+function resolvePromisify(fn) {
+    return arg => new Promise((resolve, reject) => {
+        fn(arg, (error, result) => {
+            if (error) {
+                resolve(error);
+            }
+            else {
+                resolve(result);
+            }
+        });
+    });
+}
+const resolveTxtPromise = resolvePromisify(dns.resolveTxt);
+const dnsLookupPromise = util.promisify(dns.lookup);
+/**
+ * Attempt to parse a target string as an IP address
+ * @param target
+ * @return An "IP:port" string in an array if parsing was successful, `null` otherwise
+ */
+function parseIP(target) {
+    /* These three regular expressions are all mutually exclusive, so we just
+     * want the first one that matches the target string, if any do. */
+    const ipv4Match = IPV4_REGEX.exec(target);
+    const match = ipv4Match || IPV6_REGEX.exec(target) || IPV6_BRACKET_REGEX.exec(target);
+    if (match === null) {
+        return null;
+    }
+    // ipv6 addresses should be bracketed
+    const addr = ipv4Match ? match[1] : `[${match[1]}]`;
+    let port;
+    if (match[2]) {
+        port = match[2];
+    }
+    else {
+        port = DEFAULT_PORT;
+    }
+    return [`${addr}:${port}`];
+}
+/**
+ * Merge any number of arrays into a single alternating array
+ * @param arrays
+ */
+function mergeArrays(...arrays) {
+    const result = [];
+    for (let i = 0; i <
+        Math.max.apply(null, arrays.map(array => array.length)); i++) {
+        for (const array of arrays) {
+            if (i < array.length) {
+                result.push(array[i]);
+            }
+        }
+    }
+    return result;
+}
+/**
+ * Resolver implementation that handles DNS names and IP addresses.
+ */
+class DnsResolver {
+    constructor(target, listener) {
+        this.target = target;
+        this.listener = listener;
+        /* The promise results here contain, in order, the A record, the AAAA record,
+         * and either the TXT record or an error if TXT resolution failed */
+        this.pendingResultPromise = null;
+        trace('Resolver constructed for target ' + target);
+        this.ipResult = parseIP(target);
+        const dnsMatch = DNS_REGEX.exec(target);
+        if (dnsMatch === null) {
+            this.dnsHostname = null;
+            this.port = null;
+        }
+        else {
+            this.dnsHostname = dnsMatch[1];
+            if (dnsMatch[2]) {
+                this.port = dnsMatch[2];
+            }
+            else {
+                this.port = DEFAULT_PORT;
+            }
+        }
+        this.percentage = Math.random() * 100;
+        this.defaultResolutionError = {
+            code: constants_1.Status.UNAVAILABLE,
+            details: `Name resolution failed for target ${this.target}`,
+            metadata: new metadata_1.Metadata(),
+        };
+    }
+    /**
+     * If the target is an IP address, just provide that address as a result.
+     * Otherwise, initiate A, AAAA, and TXT
+     */
+    startResolution() {
+        if (this.ipResult !== null) {
+            trace('Returning IP address for target ' + this.target);
+            setImmediate(() => {
+                this.listener.onSuccessfulResolution(this.ipResult, null, null);
+            });
+            return;
+        }
+        if (this.dnsHostname !== null) {
+            const hostname = this.dnsHostname;
+            /* We lookup both address families here and then split them up later
+             * because when looking up a single family, dns.lookup outputs an error
+             * if the name exists but there are no records for that family, and that
+             * error is indistinguishable from other kinds of errors */
+            const addressResult = dnsLookupPromise(hostname, { all: true });
+            /* We handle the TXT query promise differently than the others because
+             * the name resolution attempt as a whole is a success even if the TXT
+             * lookup fails */
+            const txtResult = resolveTxtPromise(hostname);
+            this.pendingResultPromise = Promise.all([addressResult, txtResult]);
+            this.pendingResultPromise.then(([addressList, txtRecord]) => {
+                this.pendingResultPromise = null;
+                const ip4Addresses = addressList
+                    .filter(addr => addr.family === 4)
+                    .map(addr => `${addr.address}:${this.port}`);
+                let ip6Addresses;
+                if (semver.satisfies(process.version, IPV6_SUPPORT_RANGE)) {
+                    ip6Addresses = addressList
+                        .filter(addr => addr.family === 6)
+                        .map(addr => `[${addr.address}]:${this.port}`);
+                }
+                else {
+                    ip6Addresses = [];
+                }
+                const allAddresses = mergeArrays(ip4Addresses, ip6Addresses);
+                trace('Resolved addresses for target ' + this.target + ': ' + allAddresses);
+                if (allAddresses.length === 0) {
+                    this.listener.onError(this.defaultResolutionError);
+                    return;
+                }
+                let serviceConfig = null;
+                let serviceConfigError = null;
+                if (txtRecord instanceof Error) {
+                    serviceConfigError = {
+                        code: constants_1.Status.UNAVAILABLE,
+                        details: 'TXT query failed',
+                        metadata: new metadata_1.Metadata(),
+                    };
+                }
+                else {
+                    try {
+                        serviceConfig = service_config_1.extractAndSelectServiceConfig(txtRecord, this.percentage);
+                    }
+                    catch (err) {
+                        serviceConfigError = {
+                            code: constants_1.Status.UNAVAILABLE,
+                            details: 'Parsing service config failed',
+                            metadata: new metadata_1.Metadata(),
+                        };
+                    }
+                }
+                this.listener.onSuccessfulResolution(allAddresses, serviceConfig, serviceConfigError);
+            }, err => {
+                trace('Resolution error for target ' +
+                    this.target +
+                    ': ' +
+                    err.message);
+                this.pendingResultPromise = null;
+                this.listener.onError(this.defaultResolutionError);
+            });
+        }
+    }
+    updateResolution() {
+        trace('Resolution update requested for target ' + this.target);
+        if (this.pendingResultPromise === null) {
+            this.startResolution();
+        }
+    }
+    /**
+     * Get the default authority for the given target. For IP targets, that is
+     * the IP address. For DNS targets, it is the hostname.
+     * @param target
+     */
+    static getDefaultAuthority(target) {
+        const ipMatch = IPV4_REGEX.exec(target) ||
+            IPV6_REGEX.exec(target) ||
+            IPV6_BRACKET_REGEX.exec(target);
+        if (ipMatch) {
+            return ipMatch[1];
+        }
+        const dnsMatch = DNS_REGEX.exec(target);
+        if (dnsMatch) {
+            return dnsMatch[1];
+        }
+        throw new Error(`Failed to parse target ${target}`);
+    }
+}
+/**
+ * Set up the DNS resolver class by registering it as the handler for the
+ * "dns:" prefix and as the default resolver.
+ */
+function setup() {
+    resolver_1.registerResolver('dns:', DnsResolver);
+    resolver_1.registerDefaultResolver(DnsResolver);
+}
+exports.setup = setup;
+//# sourceMappingURL=resolver-dns.js.map

node_modules/@grpc/grpc-js/build/src/resolver-uds.d.ts

@@ -0,0 +1 @@
+export declare function setup(): void;

node_modules/@grpc/grpc-js/build/src/resolver-uds.js

@@ -0,0 +1,48 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const resolver_1 = require("./resolver");
+function getUdsName(target) {
+    /* Due to how this resolver is registered, it should only be constructed
+     * with strings that start with 'unix:'. Other strings may result in
+     * nonsensical output. If the string starts with 'unix://' that entire
+     * prefix needs to be ignored */
+    if (target.startsWith('unix://')) {
+        return target.substring(7);
+    }
+    else {
+        return target.substring(5);
+    }
+}
+class UdsResolver {
+    constructor(target, listener) {
+        this.listener = listener;
+        this.addresses = [];
+        this.addresses = [getUdsName(target)];
+    }
+    updateResolution() {
+        process.nextTick(this.listener.onSuccessfulResolution, this.addresses, null, null);
+    }
+    static getDefaultAuthority(target) {
+        return 'localhost';
+    }
+}
+function setup() {
+    resolver_1.registerResolver('unix:', UdsResolver);
+}
+exports.setup = setup;
+//# sourceMappingURL=resolver-uds.js.map

node_modules/@grpc/grpc-js/build/src/resolver-uds.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/resolver.d.ts

@@ -0,0 +1,74 @@
+import { ServiceConfig } from './service-config';
+import { StatusObject } from './call-stream';
+/**
+ * A listener object passed to the resolver's constructor that provides name
+ * resolution updates back to the resolver's owner.
+ */
+export interface ResolverListener {
+    /**
+     * Called whenever the resolver has new name resolution results to report
+     * @param addressList The new list of backend addresses
+     * @param serviceConfig The new service configuration corresponding to the
+     *     `addressList`. Will be `null` if no service configuration was
+     *     retrieved or if the service configuration was invalid
+     * @param serviceConfigError If non-`null`, indicates that the retrieved
+     *     service configuration was invalid
+     */
+    onSuccessfulResolution(addressList: string[], serviceConfig: ServiceConfig | null, serviceConfigError: StatusObject | null): void;
+    /**
+     * Called whenever a name resolution attempt fails.
+     * @param error Describes how resolution failed
+     */
+    onError(error: StatusObject): void;
+}
+/**
+ * A resolver class that handles one or more of the name syntax schemes defined
+ * in the [gRPC Name Resolution document](https://github.com/grpc/grpc/blob/master/doc/naming.md)
+ */
+export interface Resolver {
+    /**
+     * Indicates that the caller wants new name resolution data. Calling this
+     * function may eventually result in calling one of the `ResolverListener`
+     * functions, but that is not guaranteed. Those functions will never be
+     * called synchronously with the constructor or updateResolution.
+     */
+    updateResolution(): void;
+}
+export interface ResolverConstructor {
+    new (target: string, listener: ResolverListener): Resolver;
+    /**
+     * Get the default authority for a target. This loosely corresponds to that
+     * target's hostname. Throws an error if this resolver class cannot parse the
+     * `target`.
+     * @param target
+     */
+    getDefaultAuthority(target: string): string;
+}
+/**
+ * Register a resolver class to handle target names prefixed with the `prefix`
+ * string. This prefix should correspond to a URI scheme name listed in the
+ * [gRPC Name Resolution document](https://github.com/grpc/grpc/blob/master/doc/naming.md)
+ * @param prefix
+ * @param resolverClass
+ */
+export declare function registerResolver(prefix: string, resolverClass: ResolverConstructor): void;
+/**
+ * Register a default resolver to handle target names that do not start with
+ * any registered prefix.
+ * @param resolverClass
+ */
+export declare function registerDefaultResolver(resolverClass: ResolverConstructor): void;
+/**
+ * Create a name resolver for the specified target, if possible. Throws an
+ * error if no such name resolver can be created.
+ * @param target
+ * @param listener
+ */
+export declare function createResolver(target: string, listener: ResolverListener): Resolver;
+/**
+ * Get the default authority for the specified target, if possible. Throws an
+ * error if no registered name resolver can parse that target string.
+ * @param target
+ */
+export declare function getDefaultAuthority(target: string): string;
+export declare function registerAll(): void;

node_modules/@grpc/grpc-js/build/src/resolver.js

@@ -0,0 +1,83 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const resolver_dns = require("./resolver-dns");
+const resolver_uds = require("./resolver-uds");
+const registeredResolvers = {};
+let defaultResolver = null;
+/**
+ * Register a resolver class to handle target names prefixed with the `prefix`
+ * string. This prefix should correspond to a URI scheme name listed in the
+ * [gRPC Name Resolution document](https://github.com/grpc/grpc/blob/master/doc/naming.md)
+ * @param prefix
+ * @param resolverClass
+ */
+function registerResolver(prefix, resolverClass) {
+    registeredResolvers[prefix] = resolverClass;
+}
+exports.registerResolver = registerResolver;
+/**
+ * Register a default resolver to handle target names that do not start with
+ * any registered prefix.
+ * @param resolverClass
+ */
+function registerDefaultResolver(resolverClass) {
+    defaultResolver = resolverClass;
+}
+exports.registerDefaultResolver = registerDefaultResolver;
+/**
+ * Create a name resolver for the specified target, if possible. Throws an
+ * error if no such name resolver can be created.
+ * @param target
+ * @param listener
+ */
+function createResolver(target, listener) {
+    for (const prefix of Object.keys(registeredResolvers)) {
+        if (target.startsWith(prefix)) {
+            return new registeredResolvers[prefix](target, listener);
+        }
+    }
+    if (defaultResolver !== null) {
+        return new defaultResolver(target, listener);
+    }
+    throw new Error(`No resolver could be created for target ${target}`);
+}
+exports.createResolver = createResolver;
+/**
+ * Get the default authority for the specified target, if possible. Throws an
+ * error if no registered name resolver can parse that target string.
+ * @param target
+ */
+function getDefaultAuthority(target) {
+    for (const prefix of Object.keys(registeredResolvers)) {
+        if (target.startsWith(prefix)) {
+            return registeredResolvers[prefix].getDefaultAuthority(target);
+        }
+    }
+    if (defaultResolver !== null) {
+        return defaultResolver.getDefaultAuthority(target);
+    }
+    throw new Error(`Invalid target ${target}`);
+}
+exports.getDefaultAuthority = getDefaultAuthority;
+function registerAll() {
+    resolver_dns.setup();
+    resolver_uds.setup();
+}
+exports.registerAll = registerAll;
+//# sourceMappingURL=resolver.js.map

node_modules/@grpc/grpc-js/build/src/resolver.js.map

@@ -0,0 +1 @@
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node_modules/@grpc/grpc-js/build/src/resolving-load-balancer.d.ts

@@ -0,0 +1,98 @@
+import { ChannelControlHelper, LoadBalancer } from './load-balancer';
+import { ServiceConfig } from './service-config';
+import { LoadBalancingConfig } from './load-balancing-config';
+export declare class ResolvingLoadBalancer implements LoadBalancer {
+    private target;
+    private channelControlHelper;
+    private defaultServiceConfig;
+    /**
+     * The resolver class constructed for the target address.
+     */
+    private innerResolver;
+    /**
+     * Current internal load balancer used for handling calls.
+     * Invariant: innerLoadBalancer === null => pendingReplacementLoadBalancer === null.
+     */
+    private innerLoadBalancer;
+    /**
+     * The load balancer instance that will be used in place of the current
+     * `innerLoadBalancer` once either that load balancer loses its connection
+     * or this one establishes a connection. For use when a new name resolution
+     * result comes in with a different load balancing configuration, and the
+     * current `innerLoadBalancer` is still connected.
+     */
+    private pendingReplacementLoadBalancer;
+    /**
+     * This resolving load balancer's current connectivity state.
+     */
+    private currentState;
+    /**
+     * The service config object from the last successful resolution, if
+     * available. A value of undefined indicates that there has not yet
+     * been a successful resolution. A value of null indicates that the last
+     * successful resolution explicitly provided a null service config.
+     */
+    private previousServiceConfig;
+    /**
+     * The most recently reported connectivity state of the `innerLoadBalancer`.
+     */
+    private innerBalancerState;
+    private innerBalancerPicker;
+    /**
+     * The most recent reported state of the pendingReplacementLoadBalancer.
+     * Starts at IDLE for type simplicity. This should get updated as soon as the
+     * pendingReplacementLoadBalancer gets constructed.
+     */
+    private replacementBalancerState;
+    /**
+     * The picker associated with the replacementBalancerState. Starts as an
+     * UnavailablePicker for type simplicity. This should get updated as soon as
+     * the pendingReplacementLoadBalancer gets constructed.
+     */
+    private replacementBalancerPicker;
+    /**
+     * ChannelControlHelper for the innerLoadBalancer.
+     */
+    private readonly innerChannelControlHelper;
+    /**
+     * ChannelControlHelper for the pendingReplacementLoadBalancer.
+     */
+    private readonly replacementChannelControlHelper;
+    /**
+     * The backoff timer for handling name resolution failures.
+     */
+    private readonly backoffTimeout;
+    /**
+     * Indicates whether we should attempt to resolve again after the backoff
+     * timer runs out.
+     */
+    private continueResolving;
+    /**
+     * Wrapper class that behaves like a `LoadBalancer` and also handles name
+     * resolution internally.
+     * @param target The address of the backend to connect to.
+     * @param channelControlHelper `ChannelControlHelper` instance provided by
+     *     this load balancer's owner.
+     * @param defaultServiceConfig The default service configuration to be used
+     *     if none is provided by the name resolver. A `null` value indicates
+     *     that the default behavior should be the default unconfigured behavior.
+     *     In practice, that means using the "pick first" load balancer
+     *     implmentation
+     */
+    constructor(target: string, channelControlHelper: ChannelControlHelper, defaultServiceConfig: ServiceConfig | null);
+    private updateResolution;
+    private updateState;
+    /**
+     * Stop using the current innerLoadBalancer and replace it with the
+     * pendingReplacementLoadBalancer. Must only be called if both of
+     * those are currently not null.
+     */
+    private switchOverReplacementBalancer;
+    private handleResolutionFailure;
+    exitIdle(): void;
+    updateAddressList(addressList: string[], lbConfig: LoadBalancingConfig | null): void;
+    resetBackoff(): void;
+    destroy(): void;
+    getTypeName(): string;
+    replaceChannelControlHelper(channelControlHelper: ChannelControlHelper): void;
+}

node_modules/@grpc/grpc-js/build/src/resolving-load-balancer.js

@@ -0,0 +1,359 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const load_balancer_1 = require("./load-balancer");
+const channel_1 = require("./channel");
+const resolver_1 = require("./resolver");
+const picker_1 = require("./picker");
+const backoff_timeout_1 = require("./backoff-timeout");
+const constants_1 = require("./constants");
+const metadata_1 = require("./metadata");
+const logging = require("./logging");
+const constants_2 = require("./constants");
+const TRACER_NAME = 'resolving_load_balancer';
+function trace(text) {
+    logging.trace(constants_2.LogVerbosity.DEBUG, TRACER_NAME, text);
+}
+const DEFAULT_LOAD_BALANCER_NAME = 'pick_first';
+class ResolvingLoadBalancer {
+    /**
+     * Wrapper class that behaves like a `LoadBalancer` and also handles name
+     * resolution internally.
+     * @param target The address of the backend to connect to.
+     * @param channelControlHelper `ChannelControlHelper` instance provided by
+     *     this load balancer's owner.
+     * @param defaultServiceConfig The default service configuration to be used
+     *     if none is provided by the name resolver. A `null` value indicates
+     *     that the default behavior should be the default unconfigured behavior.
+     *     In practice, that means using the "pick first" load balancer
+     *     implmentation
+     */
+    constructor(target, channelControlHelper, defaultServiceConfig) {
+        this.target = target;
+        this.channelControlHelper = channelControlHelper;
+        this.defaultServiceConfig = defaultServiceConfig;
+        /**
+         * Current internal load balancer used for handling calls.
+         * Invariant: innerLoadBalancer === null => pendingReplacementLoadBalancer === null.
+         */
+        this.innerLoadBalancer = null;
+        /**
+         * The load balancer instance that will be used in place of the current
+         * `innerLoadBalancer` once either that load balancer loses its connection
+         * or this one establishes a connection. For use when a new name resolution
+         * result comes in with a different load balancing configuration, and the
+         * current `innerLoadBalancer` is still connected.
+         */
+        this.pendingReplacementLoadBalancer = null;
+        /**
+         * This resolving load balancer's current connectivity state.
+         */
+        this.currentState = channel_1.ConnectivityState.IDLE;
+        /**
+         * The service config object from the last successful resolution, if
+         * available. A value of undefined indicates that there has not yet
+         * been a successful resolution. A value of null indicates that the last
+         * successful resolution explicitly provided a null service config.
+         */
+        this.previousServiceConfig = undefined;
+        /**
+         * The most recently reported connectivity state of the `innerLoadBalancer`.
+         */
+        this.innerBalancerState = channel_1.ConnectivityState.IDLE;
+        this.innerBalancerPicker = new picker_1.UnavailablePicker();
+        /**
+         * The most recent reported state of the pendingReplacementLoadBalancer.
+         * Starts at IDLE for type simplicity. This should get updated as soon as the
+         * pendingReplacementLoadBalancer gets constructed.
+         */
+        this.replacementBalancerState = channel_1.ConnectivityState.IDLE;
+        /**
+         * The picker associated with the replacementBalancerState. Starts as an
+         * UnavailablePicker for type simplicity. This should get updated as soon as
+         * the pendingReplacementLoadBalancer gets constructed.
+         */
+        this.replacementBalancerPicker = new picker_1.UnavailablePicker();
+        /**
+         * Indicates whether we should attempt to resolve again after the backoff
+         * timer runs out.
+         */
+        this.continueResolving = false;
+        this.updateState(channel_1.ConnectivityState.IDLE, new picker_1.QueuePicker(this));
+        this.innerResolver = resolver_1.createResolver(target, {
+            onSuccessfulResolution: (addressList, serviceConfig, serviceConfigError) => {
+                let workingServiceConfig = null;
+                /* This first group of conditionals implements the algorithm described
+                 * in https://github.com/grpc/proposal/blob/master/A21-service-config-error-handling.md
+                 * in the section called "Behavior on receiving a new gRPC Config".
+                 */
+                if (serviceConfig === null) {
+                    // Step 4 and 5
+                    if (serviceConfigError === null) {
+                        // Step 5
+                        this.previousServiceConfig = serviceConfig;
+                        workingServiceConfig = this.defaultServiceConfig;
+                    }
+                    else {
+                        // Step 4
+                        if (this.previousServiceConfig === undefined) {
+                            // Step 4.ii
+                            if (this.defaultServiceConfig === null) {
+                                // Step 4.ii.b
+                                this.handleResolutionFailure(serviceConfigError);
+                            }
+                            else {
+                                // Step 4.ii.a
+                                workingServiceConfig = this.defaultServiceConfig;
+                            }
+                        }
+                        else {
+                            // Step 4.i
+                            workingServiceConfig = this.previousServiceConfig;
+                        }
+                    }
+                }
+                else {
+                    // Step 3
+                    workingServiceConfig = serviceConfig;
+                    this.previousServiceConfig = serviceConfig;
+                }
+                let loadBalancerName = null;
+                let loadBalancingConfig = null;
+                if (workingServiceConfig === null ||
+                    workingServiceConfig.loadBalancingConfig.length === 0) {
+                    loadBalancerName = DEFAULT_LOAD_BALANCER_NAME;
+                }
+                else {
+                    for (const lbConfig of workingServiceConfig.loadBalancingConfig) {
+                        // Iterating through a oneof looking for whichever one is populated
+                        for (const key in lbConfig) {
+                            if (Object.prototype.hasOwnProperty.call(lbConfig, key)) {
+                                if (load_balancer_1.isLoadBalancerNameRegistered(key)) {
+                                    loadBalancerName = key;
+                                    loadBalancingConfig = lbConfig;
+                                    break;
+                                }
+                            }
+                        }
+                        if (loadBalancerName !== null) {
+                            break;
+                        }
+                    }
+                    if (loadBalancerName === null) {
+                        // There were load balancing configs but none are supported. This counts as a resolution failure
+                        this.handleResolutionFailure({
+                            code: constants_1.Status.UNAVAILABLE,
+                            details: 'All load balancer options in service config are not compatible',
+                            metadata: new metadata_1.Metadata(),
+                        });
+                        return;
+                    }
+                }
+                if (this.innerLoadBalancer === null) {
+                    this.innerLoadBalancer = load_balancer_1.createLoadBalancer(loadBalancerName, this.innerChannelControlHelper);
+                    this.innerLoadBalancer.updateAddressList(addressList, loadBalancingConfig);
+                }
+                else if (this.innerLoadBalancer.getTypeName() === loadBalancerName) {
+                    this.innerLoadBalancer.updateAddressList(addressList, loadBalancingConfig);
+                }
+                else {
+                    if (this.pendingReplacementLoadBalancer === null ||
+                        this.pendingReplacementLoadBalancer.getTypeName() !==
+                            loadBalancerName) {
+                        if (this.pendingReplacementLoadBalancer !== null) {
+                            this.pendingReplacementLoadBalancer.destroy();
+                        }
+                        this.pendingReplacementLoadBalancer = load_balancer_1.createLoadBalancer(loadBalancerName, this.replacementChannelControlHelper);
+                    }
+                    this.pendingReplacementLoadBalancer.updateAddressList(addressList, loadBalancingConfig);
+                }
+            },
+            onError: (error) => {
+                this.handleResolutionFailure(error);
+            },
+        });
+        this.innerChannelControlHelper = {
+            createSubchannel: (subchannelAddress, subchannelArgs) => {
+                return this.channelControlHelper.createSubchannel(subchannelAddress, subchannelArgs);
+            },
+            updateState: (connectivityState, picker) => {
+                this.innerBalancerState = connectivityState;
+                if (connectivityState === channel_1.ConnectivityState.IDLE) {
+                    picker = new picker_1.QueuePicker(this);
+                }
+                this.innerBalancerPicker = picker;
+                if (connectivityState !== channel_1.ConnectivityState.READY &&
+                    this.pendingReplacementLoadBalancer !== null) {
+                    this.switchOverReplacementBalancer();
+                }
+                else {
+                    if (connectivityState === channel_1.ConnectivityState.IDLE) {
+                        if (this.innerLoadBalancer) {
+                            this.innerLoadBalancer.destroy();
+                            this.innerLoadBalancer = null;
+                        }
+                    }
+                    this.updateState(connectivityState, picker);
+                }
+            },
+            requestReresolution: () => {
+                if (this.pendingReplacementLoadBalancer === null) {
+                    /* If the backoffTimeout is running, we're still backing off from
+                     * making resolve requests, so we shouldn't make another one here.
+                     * In that case, the backoff timer callback will call
+                     * updateResolution */
+                    if (this.backoffTimeout.isRunning()) {
+                        this.continueResolving = true;
+                    }
+                    else {
+                        this.updateResolution();
+                    }
+                }
+            },
+        };
+        this.replacementChannelControlHelper = {
+            createSubchannel: (subchannelAddress, subchannelArgs) => {
+                return this.channelControlHelper.createSubchannel(subchannelAddress, subchannelArgs);
+            },
+            updateState: (connectivityState, picker) => {
+                if (connectivityState === channel_1.ConnectivityState.IDLE) {
+                    picker = new picker_1.QueuePicker(this);
+                }
+                this.replacementBalancerState = connectivityState;
+                this.replacementBalancerPicker = picker;
+                if (connectivityState === channel_1.ConnectivityState.READY) {
+                    this.switchOverReplacementBalancer();
+                }
+                else if (connectivityState === channel_1.ConnectivityState.IDLE) {
+                    if (this.pendingReplacementLoadBalancer) {
+                        this.pendingReplacementLoadBalancer.destroy();
+                        this.pendingReplacementLoadBalancer = null;
+                    }
+                }
+            },
+            requestReresolution: () => {
+                /* If the backoffTimeout is running, we're still backing off from
+                 * making resolve requests, so we shouldn't make another one here.
+                 * In that case, the backoff timer callback will call
+                 * updateResolution */
+                if (this.backoffTimeout.isRunning()) {
+                    this.continueResolving = true;
+                }
+                else {
+                    this.updateResolution();
+                }
+            },
+        };
+        this.backoffTimeout = new backoff_timeout_1.BackoffTimeout(() => {
+            if (this.continueResolving) {
+                this.updateResolution();
+                this.continueResolving = false;
+            }
+            else {
+                if (this.innerLoadBalancer === null) {
+                    this.updateState(channel_1.ConnectivityState.IDLE, new picker_1.QueuePicker(this));
+                }
+                else {
+                    this.updateState(this.innerBalancerState, this.innerBalancerPicker);
+                }
+            }
+        });
+    }
+    updateResolution() {
+        this.innerResolver.updateResolution();
+        if (this.innerLoadBalancer === null ||
+            this.innerBalancerState === channel_1.ConnectivityState.IDLE) {
+            this.updateState(channel_1.ConnectivityState.CONNECTING, new picker_1.QueuePicker(this));
+        }
+    }
+    updateState(connectivitystate, picker) {
+        trace(this.target +
+            ' ' +
+            channel_1.ConnectivityState[this.currentState] +
+            ' -> ' +
+            channel_1.ConnectivityState[connectivitystate]);
+        this.currentState = connectivitystate;
+        this.channelControlHelper.updateState(connectivitystate, picker);
+    }
+    /**
+     * Stop using the current innerLoadBalancer and replace it with the
+     * pendingReplacementLoadBalancer. Must only be called if both of
+     * those are currently not null.
+     */
+    switchOverReplacementBalancer() {
+        this.innerLoadBalancer.destroy();
+        this.innerLoadBalancer = this.pendingReplacementLoadBalancer;
+        this.innerLoadBalancer.replaceChannelControlHelper(this.innerChannelControlHelper);
+        this.pendingReplacementLoadBalancer = null;
+        this.innerBalancerState = this.replacementBalancerState;
+        this.innerBalancerPicker = this.replacementBalancerPicker;
+        this.updateState(this.replacementBalancerState, this.replacementBalancerPicker);
+    }
+    handleResolutionFailure(error) {
+        if (this.innerLoadBalancer === null ||
+            this.innerBalancerState === channel_1.ConnectivityState.IDLE) {
+            this.updateState(channel_1.ConnectivityState.TRANSIENT_FAILURE, new picker_1.UnavailablePicker(error));
+        }
+        this.backoffTimeout.runOnce();
+    }
+    exitIdle() {
+        if (this.innerLoadBalancer !== null) {
+            this.innerLoadBalancer.exitIdle();
+        }
+        if (this.currentState === channel_1.ConnectivityState.IDLE) {
+            if (this.backoffTimeout.isRunning()) {
+                this.continueResolving = true;
+            }
+            else {
+                this.updateResolution();
+            }
+            this.updateState(channel_1.ConnectivityState.CONNECTING, new picker_1.QueuePicker(this));
+        }
+    }
+    updateAddressList(addressList, lbConfig) {
+        throw new Error('updateAddressList not supported on ResolvingLoadBalancer');
+    }
+    resetBackoff() {
+        this.backoffTimeout.reset();
+        if (this.innerLoadBalancer !== null) {
+            this.innerLoadBalancer.resetBackoff();
+        }
+        if (this.pendingReplacementLoadBalancer !== null) {
+            this.pendingReplacementLoadBalancer.resetBackoff();
+        }
+    }
+    destroy() {
+        if (this.innerLoadBalancer !== null) {
+            this.innerLoadBalancer.destroy();
+            this.innerLoadBalancer = null;
+        }
+        if (this.pendingReplacementLoadBalancer !== null) {
+            this.pendingReplacementLoadBalancer.destroy();
+            this.pendingReplacementLoadBalancer = null;
+        }
+        this.updateState(channel_1.ConnectivityState.SHUTDOWN, new picker_1.UnavailablePicker());
+    }
+    getTypeName() {
+        return 'resolving_load_balancer';
+    }
+    replaceChannelControlHelper(channelControlHelper) {
+        this.channelControlHelper = channelControlHelper;
+    }
+}
+exports.ResolvingLoadBalancer = ResolvingLoadBalancer;
+//# sourceMappingURL=resolving-load-balancer.js.map

node_modules/@grpc/grpc-js/build/src/server-call.d.ts

@@ -0,0 +1,127 @@
+/// <reference types="node" />
+import { EventEmitter } from 'events';
+import * as http2 from 'http2';
+import { Duplex, Readable, Writable } from 'stream';
+import { StatusObject } from './call-stream';
+import { Deserialize, Serialize } from './make-client';
+import { Metadata } from './metadata';
+import { ObjectReadable, ObjectWritable } from './object-stream';
+export declare type ServerStatusResponse = Partial<StatusObject>;
+export declare type ServerErrorResponse = ServerStatusResponse & Error;
+export declare type ServerSurfaceCall = {
+    cancelled: boolean;
+    getPeer(): string;
+    sendMetadata(responseMetadata: Metadata): void;
+} & EventEmitter;
+export declare type ServerUnaryCall<RequestType, ResponseType> = ServerSurfaceCall & {
+    request: RequestType | null;
+};
+export declare type ServerReadableStream<RequestType, ResponseType> = ServerSurfaceCall & ObjectReadable<RequestType>;
+export declare type ServerWritableStream<RequestType, ResponseType> = ServerSurfaceCall & ObjectWritable<ResponseType> & {
+    request: RequestType | null;
+};
+export declare type ServerDuplexStream<RequestType, ResponseType> = ServerSurfaceCall & ObjectReadable<RequestType> & ObjectWritable<ResponseType>;
+export declare class ServerUnaryCallImpl<RequestType, ResponseType> extends EventEmitter implements ServerUnaryCall<RequestType, ResponseType> {
+    private call;
+    metadata: Metadata;
+    cancelled: boolean;
+    request: RequestType | null;
+    constructor(call: Http2ServerCallStream<RequestType, ResponseType>, metadata: Metadata);
+    getPeer(): string;
+    sendMetadata(responseMetadata: Metadata): void;
+}
+export declare class ServerReadableStreamImpl<RequestType, ResponseType> extends Readable implements ServerReadableStream<RequestType, ResponseType> {
+    private call;
+    metadata: Metadata;
+    deserialize: Deserialize<RequestType>;
+    cancelled: boolean;
+    constructor(call: Http2ServerCallStream<RequestType, ResponseType>, metadata: Metadata, deserialize: Deserialize<RequestType>);
+    _read(size: number): void;
+    getPeer(): string;
+    sendMetadata(responseMetadata: Metadata): void;
+}
+export declare class ServerWritableStreamImpl<RequestType, ResponseType> extends Writable implements ServerWritableStream<RequestType, ResponseType> {
+    private call;
+    metadata: Metadata;
+    serialize: Serialize<ResponseType>;
+    cancelled: boolean;
+    request: RequestType | null;
+    private trailingMetadata;
+    constructor(call: Http2ServerCallStream<RequestType, ResponseType>, metadata: Metadata, serialize: Serialize<ResponseType>);
+    getPeer(): string;
+    sendMetadata(responseMetadata: Metadata): void;
+    _write(chunk: ResponseType, encoding: string, callback: (...args: any[]) => void): Promise<void>;
+    _final(callback: Function): void;
+    end(metadata?: any): void;
+}
+export declare class ServerDuplexStreamImpl<RequestType, ResponseType> extends Duplex implements ServerDuplexStream<RequestType, ResponseType> {
+    private call;
+    metadata: Metadata;
+    serialize: Serialize<ResponseType>;
+    deserialize: Deserialize<RequestType>;
+    cancelled: boolean;
+    private trailingMetadata;
+    constructor(call: Http2ServerCallStream<RequestType, ResponseType>, metadata: Metadata, serialize: Serialize<ResponseType>, deserialize: Deserialize<RequestType>);
+    getPeer(): string;
+    sendMetadata(responseMetadata: Metadata): void;
+}
+export declare type sendUnaryData<ResponseType> = (error: ServerErrorResponse | ServerStatusResponse | null, value: ResponseType | null, trailer?: Metadata, flags?: number) => void;
+export declare type handleUnaryCall<RequestType, ResponseType> = (call: ServerUnaryCall<RequestType, ResponseType>, callback: sendUnaryData<ResponseType>) => void;
+export declare type handleClientStreamingCall<RequestType, ResponseType> = (call: ServerReadableStream<RequestType, ResponseType>, callback: sendUnaryData<ResponseType>) => void;
+export declare type handleServerStreamingCall<RequestType, ResponseType> = (call: ServerWritableStream<RequestType, ResponseType>) => void;
+export declare type handleBidiStreamingCall<RequestType, ResponseType> = (call: ServerDuplexStream<RequestType, ResponseType>) => void;
+export declare type HandleCall<RequestType, ResponseType> = handleUnaryCall<RequestType, ResponseType> | handleClientStreamingCall<RequestType, ResponseType> | handleServerStreamingCall<RequestType, ResponseType> | handleBidiStreamingCall<RequestType, ResponseType>;
+export interface UnaryHandler<RequestType, ResponseType> {
+    func: handleUnaryCall<RequestType, ResponseType>;
+    serialize: Serialize<ResponseType>;
+    deserialize: Deserialize<RequestType>;
+    type: HandlerType;
+}
+export interface ClientStreamingHandler<RequestType, ResponseType> {
+    func: handleClientStreamingCall<RequestType, ResponseType>;
+    serialize: Serialize<ResponseType>;
+    deserialize: Deserialize<RequestType>;
+    type: HandlerType;
+}
+export interface ServerStreamingHandler<RequestType, ResponseType> {
+    func: handleServerStreamingCall<RequestType, ResponseType>;
+    serialize: Serialize<ResponseType>;
+    deserialize: Deserialize<RequestType>;
+    type: HandlerType;
+}
+export interface BidiStreamingHandler<RequestType, ResponseType> {
+    func: handleBidiStreamingCall<RequestType, ResponseType>;
+    serialize: Serialize<ResponseType>;
+    deserialize: Deserialize<RequestType>;
+    type: HandlerType;
+}
+export declare type Handler<RequestType, ResponseType> = UnaryHandler<RequestType, ResponseType> | ClientStreamingHandler<RequestType, ResponseType> | ServerStreamingHandler<RequestType, ResponseType> | BidiStreamingHandler<RequestType, ResponseType>;
+export declare type HandlerType = 'bidi' | 'clientStream' | 'serverStream' | 'unary';
+export declare class Http2ServerCallStream<RequestType, ResponseType> extends EventEmitter {
+    private stream;
+    private handler;
+    cancelled: boolean;
+    deadline: NodeJS.Timer;
+    private wantTrailers;
+    private metadataSent;
+    private canPush;
+    private isPushPending;
+    private bufferedMessages;
+    private messagesToPush;
+    constructor(stream: http2.ServerHttp2Stream, handler: Handler<RequestType, ResponseType>);
+    sendMetadata(customMetadata?: Metadata): void;
+    receiveMetadata(headers: http2.IncomingHttpHeaders): Metadata | undefined;
+    receiveUnaryMessage(): Promise<RequestType>;
+    serializeMessage(value: ResponseType): Buffer;
+    deserializeMessage(bytes: Buffer): Promise<RequestType>;
+    sendUnaryMessage(err: ServerErrorResponse | ServerStatusResponse | null, value: ResponseType | null, metadata?: Metadata, flags?: number): Promise<void>;
+    sendStatus(statusObj: StatusObject): void;
+    sendError(error: ServerErrorResponse | ServerStatusResponse): void;
+    write(chunk: Buffer): boolean | undefined;
+    resume(): void;
+    setupSurfaceCall(call: ServerSurfaceCall): void;
+    setupReadable(readable: ServerReadableStream<RequestType, ResponseType> | ServerDuplexStream<RequestType, ResponseType>): void;
+    consumeUnpushedMessages(readable: ServerReadableStream<RequestType, ResponseType> | ServerDuplexStream<RequestType, ResponseType>): boolean;
+    private pushOrBufferMessage;
+    private pushMessage;
+}

node_modules/@grpc/grpc-js/build/src/server-call.js

@@ -0,0 +1,416 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const events_1 = require("events");
+const http2 = require("http2");
+const stream_1 = require("stream");
+const constants_1 = require("./constants");
+const metadata_1 = require("./metadata");
+const stream_decoder_1 = require("./stream-decoder");
+const GRPC_ACCEPT_ENCODING_HEADER = 'grpc-accept-encoding';
+const GRPC_ENCODING_HEADER = 'grpc-encoding';
+const GRPC_MESSAGE_HEADER = 'grpc-message';
+const GRPC_STATUS_HEADER = 'grpc-status';
+const GRPC_TIMEOUT_HEADER = 'grpc-timeout';
+const DEADLINE_REGEX = /(\d{1,8})\s*([HMSmun])/;
+const deadlineUnitsToMs = {
+    H: 3600000,
+    M: 60000,
+    S: 1000,
+    m: 1,
+    u: 0.001,
+    n: 0.000001,
+};
+const defaultResponseHeaders = {
+    // TODO(cjihrig): Remove these encoding headers from the default response
+    // once compression is integrated.
+    [GRPC_ACCEPT_ENCODING_HEADER]: 'identity',
+    [GRPC_ENCODING_HEADER]: 'identity',
+    [http2.constants.HTTP2_HEADER_STATUS]: http2.constants.HTTP_STATUS_OK,
+    [http2.constants.HTTP2_HEADER_CONTENT_TYPE]: 'application/grpc+proto',
+};
+const defaultResponseOptions = {
+    waitForTrailers: true,
+};
+class ServerUnaryCallImpl extends events_1.EventEmitter {
+    constructor(call, metadata) {
+        super();
+        this.call = call;
+        this.metadata = metadata;
+        this.cancelled = false;
+        this.request = null;
+        this.call.setupSurfaceCall(this);
+    }
+    getPeer() {
+        throw new Error('not implemented yet');
+    }
+    sendMetadata(responseMetadata) {
+        this.call.sendMetadata(responseMetadata);
+    }
+}
+exports.ServerUnaryCallImpl = ServerUnaryCallImpl;
+class ServerReadableStreamImpl extends stream_1.Readable {
+    constructor(call, metadata, deserialize) {
+        super({ objectMode: true });
+        this.call = call;
+        this.metadata = metadata;
+        this.deserialize = deserialize;
+        this.cancelled = false;
+        this.call.setupSurfaceCall(this);
+        this.call.setupReadable(this);
+    }
+    _read(size) {
+        if (!this.call.consumeUnpushedMessages(this)) {
+            return;
+        }
+        this.call.resume();
+    }
+    getPeer() {
+        throw new Error('not implemented yet');
+    }
+    sendMetadata(responseMetadata) {
+        this.call.sendMetadata(responseMetadata);
+    }
+}
+exports.ServerReadableStreamImpl = ServerReadableStreamImpl;
+class ServerWritableStreamImpl extends stream_1.Writable {
+    constructor(call, metadata, serialize) {
+        super({ objectMode: true });
+        this.call = call;
+        this.metadata = metadata;
+        this.serialize = serialize;
+        this.cancelled = false;
+        this.request = null;
+        this.trailingMetadata = new metadata_1.Metadata();
+        this.call.setupSurfaceCall(this);
+        this.on('error', err => {
+            this.call.sendError(err);
+            this.end();
+        });
+    }
+    getPeer() {
+        throw new Error('not implemented yet');
+    }
+    sendMetadata(responseMetadata) {
+        this.call.sendMetadata(responseMetadata);
+    }
+    async _write(chunk, encoding, 
+    // tslint:disable-next-line:no-any
+    callback) {
+        try {
+            const response = await this.call.serializeMessage(chunk);
+            if (!this.call.write(response)) {
+                this.call.once('drain', callback);
+                return;
+            }
+        }
+        catch (err) {
+            err.code = constants_1.Status.INTERNAL;
+            this.emit('error', err);
+        }
+        callback();
+    }
+    _final(callback) {
+        this.call.sendStatus({
+            code: constants_1.Status.OK,
+            details: 'OK',
+            metadata: this.trailingMetadata,
+        });
+        callback(null);
+    }
+    // tslint:disable-next-line:no-any
+    end(metadata) {
+        if (metadata) {
+            this.trailingMetadata = metadata;
+        }
+        super.end();
+    }
+}
+exports.ServerWritableStreamImpl = ServerWritableStreamImpl;
+class ServerDuplexStreamImpl extends stream_1.Duplex {
+    constructor(call, metadata, serialize, deserialize) {
+        super({ objectMode: true });
+        this.call = call;
+        this.metadata = metadata;
+        this.serialize = serialize;
+        this.deserialize = deserialize;
+        this.cancelled = false;
+        this.trailingMetadata = new metadata_1.Metadata();
+        this.call.setupSurfaceCall(this);
+        this.call.setupReadable(this);
+        this.on('error', err => {
+            this.call.sendError(err);
+            this.end();
+        });
+    }
+    getPeer() {
+        throw new Error('not implemented yet');
+    }
+    sendMetadata(responseMetadata) {
+        this.call.sendMetadata(responseMetadata);
+    }
+}
+exports.ServerDuplexStreamImpl = ServerDuplexStreamImpl;
+ServerDuplexStreamImpl.prototype._read =
+    ServerReadableStreamImpl.prototype._read;
+ServerDuplexStreamImpl.prototype._write =
+    ServerWritableStreamImpl.prototype._write;
+ServerDuplexStreamImpl.prototype._final =
+    ServerWritableStreamImpl.prototype._final;
+ServerDuplexStreamImpl.prototype.end = ServerWritableStreamImpl.prototype.end;
+const noopTimer = setTimeout(() => { }, 0);
+// Internal class that wraps the HTTP2 request.
+class Http2ServerCallStream extends events_1.EventEmitter {
+    constructor(stream, handler) {
+        super();
+        this.stream = stream;
+        this.handler = handler;
+        this.cancelled = false;
+        this.deadline = noopTimer;
+        this.wantTrailers = false;
+        this.metadataSent = false;
+        this.canPush = false;
+        this.isPushPending = false;
+        this.bufferedMessages = [];
+        this.messagesToPush = [];
+        this.stream.once('error', (err) => {
+            err.code = constants_1.Status.INTERNAL;
+            this.sendError(err);
+        });
+        this.stream.once('close', () => {
+            if (this.stream.rstCode === http2.constants.NGHTTP2_CANCEL) {
+                this.cancelled = true;
+                this.emit('cancelled', 'cancelled');
+            }
+        });
+        this.stream.on('drain', () => {
+            this.emit('drain');
+        });
+    }
+    sendMetadata(customMetadata) {
+        if (this.metadataSent) {
+            return;
+        }
+        this.metadataSent = true;
+        const custom = customMetadata ? customMetadata.toHttp2Headers() : null;
+        // TODO(cjihrig): Include compression headers.
+        const headers = Object.assign(defaultResponseHeaders, custom);
+        this.stream.respond(headers, defaultResponseOptions);
+    }
+    receiveMetadata(headers) {
+        const metadata = metadata_1.Metadata.fromHttp2Headers(headers);
+        // TODO(cjihrig): Receive compression metadata.
+        const timeoutHeader = metadata.get(GRPC_TIMEOUT_HEADER);
+        if (timeoutHeader.length > 0) {
+            const match = timeoutHeader[0].toString().match(DEADLINE_REGEX);
+            if (match === null) {
+                const err = new Error('Invalid deadline');
+                err.code = constants_1.Status.OUT_OF_RANGE;
+                this.sendError(err);
+                return;
+            }
+            const timeout = (+match[1] * deadlineUnitsToMs[match[2]]) | 0;
+            this.deadline = setTimeout(handleExpiredDeadline, timeout, this);
+            metadata.remove(GRPC_TIMEOUT_HEADER);
+        }
+        return metadata;
+    }
+    receiveUnaryMessage() {
+        return new Promise((resolve, reject) => {
+            const stream = this.stream;
+            const chunks = [];
+            let totalLength = 0;
+            stream.on('data', (data) => {
+                chunks.push(data);
+                totalLength += data.byteLength;
+            });
+            stream.once('end', async () => {
+                try {
+                    const requestBytes = Buffer.concat(chunks, totalLength);
+                    resolve(await this.deserializeMessage(requestBytes));
+                }
+                catch (err) {
+                    err.code = constants_1.Status.INTERNAL;
+                    this.sendError(err);
+                    resolve();
+                }
+            });
+        });
+    }
+    serializeMessage(value) {
+        const messageBuffer = this.handler.serialize(value);
+        // TODO(cjihrig): Call compression aware serializeMessage().
+        const byteLength = messageBuffer.byteLength;
+        const output = Buffer.allocUnsafe(byteLength + 5);
+        output.writeUInt8(0, 0);
+        output.writeUInt32BE(byteLength, 1);
+        messageBuffer.copy(output, 5);
+        return output;
+    }
+    async deserializeMessage(bytes) {
+        // TODO(cjihrig): Call compression aware deserializeMessage().
+        const receivedMessage = bytes.slice(5);
+        return this.handler.deserialize(receivedMessage);
+    }
+    async sendUnaryMessage(err, value, metadata, flags) {
+        if (!metadata) {
+            metadata = new metadata_1.Metadata();
+        }
+        if (err) {
+            err.metadata = metadata;
+            this.sendError(err);
+            return;
+        }
+        try {
+            const response = await this.serializeMessage(value);
+            this.write(response);
+            this.sendStatus({ code: constants_1.Status.OK, details: 'OK', metadata });
+        }
+        catch (err) {
+            err.code = constants_1.Status.INTERNAL;
+            this.sendError(err);
+        }
+    }
+    sendStatus(statusObj) {
+        if (this.cancelled) {
+            return;
+        }
+        clearTimeout(this.deadline);
+        if (!this.wantTrailers) {
+            this.wantTrailers = true;
+            this.stream.once('wantTrailers', () => {
+                const trailersToSend = Object.assign({
+                    [GRPC_STATUS_HEADER]: statusObj.code,
+                    [GRPC_MESSAGE_HEADER]: encodeURI(statusObj.details),
+                }, statusObj.metadata.toHttp2Headers());
+                this.stream.sendTrailers(trailersToSend);
+            });
+            this.sendMetadata();
+            this.stream.end();
+        }
+    }
+    sendError(error) {
+        const status = {
+            code: constants_1.Status.UNKNOWN,
+            details: 'message' in error ? error.message : 'Unknown Error',
+            metadata: 'metadata' in error && error.metadata !== undefined
+                ? error.metadata
+                : new metadata_1.Metadata(),
+        };
+        if ('code' in error &&
+            typeof error.code === 'number' &&
+            Number.isInteger(error.code)) {
+            status.code = error.code;
+            if ('details' in error && typeof error.details === 'string') {
+                status.details = error.details;
+            }
+        }
+        this.sendStatus(status);
+    }
+    write(chunk) {
+        if (this.cancelled) {
+            return;
+        }
+        this.sendMetadata();
+        return this.stream.write(chunk);
+    }
+    resume() {
+        this.stream.resume();
+    }
+    setupSurfaceCall(call) {
+        this.once('cancelled', reason => {
+            call.cancelled = true;
+            call.emit('cancelled', reason);
+        });
+    }
+    setupReadable(readable) {
+        const decoder = new stream_decoder_1.StreamDecoder();
+        this.stream.on('data', async (data) => {
+            const messages = decoder.write(data);
+            for (const message of messages) {
+                this.pushOrBufferMessage(readable, message);
+            }
+        });
+        this.stream.once('end', () => {
+            this.pushOrBufferMessage(readable, null);
+        });
+    }
+    consumeUnpushedMessages(readable) {
+        this.canPush = true;
+        while (this.messagesToPush.length > 0) {
+            const nextMessage = this.messagesToPush.shift();
+            const canPush = readable.push(nextMessage);
+            if (nextMessage === null || canPush === false) {
+                this.canPush = false;
+                break;
+            }
+        }
+        return this.canPush;
+    }
+    pushOrBufferMessage(readable, messageBytes) {
+        if (this.isPushPending) {
+            this.bufferedMessages.push(messageBytes);
+        }
+        else {
+            this.pushMessage(readable, messageBytes);
+        }
+    }
+    async pushMessage(readable, messageBytes) {
+        if (messageBytes === null) {
+            if (this.canPush) {
+                readable.push(null);
+            }
+            else {
+                this.messagesToPush.push(null);
+            }
+            return;
+        }
+        this.isPushPending = true;
+        try {
+            const deserialized = await this.deserializeMessage(messageBytes);
+            if (this.canPush) {
+                if (!readable.push(deserialized)) {
+                    this.canPush = false;
+                    this.stream.pause();
+                }
+            }
+            else {
+                this.messagesToPush.push(deserialized);
+            }
+        }
+        catch (err) {
+            // Ignore any remaining messages when errors occur.
+            this.bufferedMessages.length = 0;
+            err.code = constants_1.Status.INTERNAL;
+            readable.emit('error', err);
+        }
+        this.isPushPending = false;
+        if (this.bufferedMessages.length > 0) {
+            this.pushMessage(readable, this.bufferedMessages.shift());
+        }
+    }
+}
+exports.Http2ServerCallStream = Http2ServerCallStream;
+function handleExpiredDeadline(call) {
+    const err = new Error('Deadline exceeded');
+    err.code = constants_1.Status.DEADLINE_EXCEEDED;
+    call.sendError(err);
+    call.cancelled = true;
+    call.emit('cancelled', 'deadline');
+}
+//# sourceMappingURL=server-call.js.map

node_modules/@grpc/grpc-js/build/src/server-credentials.d.ts

@@ -0,0 +1,12 @@
+/// <reference types="node" />
+import { SecureServerOptions } from 'http2';
+export interface KeyCertPair {
+    private_key: Buffer;
+    cert_chain: Buffer;
+}
+export declare abstract class ServerCredentials {
+    abstract _isSecure(): boolean;
+    abstract _getSettings(): SecureServerOptions | null;
+    static createInsecure(): ServerCredentials;
+    static createSsl(rootCerts: Buffer | null, keyCertPairs: KeyCertPair[], checkClientCertificate?: boolean): ServerCredentials;
+}

node_modules/@grpc/grpc-js/build/src/server-credentials.js

@@ -0,0 +1,80 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const tls_helpers_1 = require("./tls-helpers");
+class ServerCredentials {
+    static createInsecure() {
+        return new InsecureServerCredentials();
+    }
+    static createSsl(rootCerts, keyCertPairs, checkClientCertificate = false) {
+        if (rootCerts !== null && !Buffer.isBuffer(rootCerts)) {
+            throw new TypeError('rootCerts must be null or a Buffer');
+        }
+        if (!Array.isArray(keyCertPairs)) {
+            throw new TypeError('keyCertPairs must be an array');
+        }
+        if (typeof checkClientCertificate !== 'boolean') {
+            throw new TypeError('checkClientCertificate must be a boolean');
+        }
+        const cert = [];
+        const key = [];
+        for (let i = 0; i < keyCertPairs.length; i++) {
+            const pair = keyCertPairs[i];
+            if (pair === null || typeof pair !== 'object') {
+                throw new TypeError(`keyCertPair[${i}] must be an object`);
+            }
+            if (!Buffer.isBuffer(pair.private_key)) {
+                throw new TypeError(`keyCertPair[${i}].private_key must be a Buffer`);
+            }
+            if (!Buffer.isBuffer(pair.cert_chain)) {
+                throw new TypeError(`keyCertPair[${i}].cert_chain must be a Buffer`);
+            }
+            cert.push(pair.cert_chain);
+            key.push(pair.private_key);
+        }
+        return new SecureServerCredentials({
+            ca: rootCerts || tls_helpers_1.getDefaultRootsData() || undefined,
+            cert,
+            key,
+            requestCert: checkClientCertificate,
+            ciphers: tls_helpers_1.CIPHER_SUITES
+        });
+    }
+}
+exports.ServerCredentials = ServerCredentials;
+class InsecureServerCredentials extends ServerCredentials {
+    _isSecure() {
+        return false;
+    }
+    _getSettings() {
+        return null;
+    }
+}
+class SecureServerCredentials extends ServerCredentials {
+    constructor(options) {
+        super();
+        this.options = options;
+    }
+    _isSecure() {
+        return true;
+    }
+    _getSettings() {
+        return this.options;
+    }
+}
+//# sourceMappingURL=server-credentials.js.map

node_modules/@grpc/grpc-js/build/src/server-credentials.js.map

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node_modules/@grpc/grpc-js/build/src/server.d.ts

@@ -0,0 +1,26 @@
+import { Deserialize, Serialize, ServiceDefinition } from './make-client';
+import { HandleCall } from './server-call';
+import { ServerCredentials } from './server-credentials';
+import { ChannelOptions } from './channel-options';
+export declare type UntypedHandleCall = HandleCall<any, any>;
+export interface UntypedServiceImplementation {
+    [name: string]: UntypedHandleCall;
+}
+export declare class Server {
+    private http2Server;
+    private handlers;
+    private sessions;
+    private started;
+    private options;
+    constructor(options?: ChannelOptions);
+    addProtoService(): void;
+    addService(service: ServiceDefinition, implementation: UntypedServiceImplementation): void;
+    bind(port: string, creds: ServerCredentials): void;
+    bindAsync(port: string, creds: ServerCredentials, callback: (error: Error | null, port: number) => void): void;
+    forceShutdown(): void;
+    register<RequestType, ResponseType>(name: string, handler: HandleCall<RequestType, ResponseType>, serialize: Serialize<ResponseType>, deserialize: Deserialize<RequestType>, type: string): boolean;
+    start(): void;
+    tryShutdown(callback: (error?: Error) => void): void;
+    addHttp2Port(): void;
+    private _setupHandlers;
+}