Merge branch 'xh' of https://bdgit.educoder.net/psbipctq7/lvgl into xh

.vs/ProjectSettings.json

@@ -0,0 +1,3 @@
+{
+  "CurrentProjectSetting": null
+}

.vs/VSWorkspaceState.json

@@ -0,0 +1,6 @@
+{
+  "ExpandedNodes": [
+    ""
+  ],
+  "PreviewInSolutionExplorer": false
+}

.vs/lvgl/v17/DocumentLayout.json

@@ -0,0 +1,12 @@
+{
+  "Version": 1,
+  "WorkspaceRootPath": "C:\\Users\\11855\\Desktop\\\u674E\u5B66\u6210\\lvgl\\",
+  "Documents": [],
+  "DocumentGroupContainers": [
+    {
+      "Orientation": 0,
+      "VerticalTabListWidth": 256,
+      "DocumentGroups": []
+    }
+  ]
+}

travel-backend/.gitignore

@@ -0,0 +1,39 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+.kotlin
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

travel-backend/.idea/.gitignore

@@ -0,0 +1,3 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml

travel-backend/.idea/encodings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" native2AsciiForPropertiesFiles="true" defaultCharsetForPropertiesFiles="UTF-8">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

travel-backend/.idea/misc.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+    <option name="ignoredFiles">
+      <set>
+        <option value="$PROJECT_DIR$/src/pom.xml" />
+      </set>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="openjdk-21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

travel-backend/api.txt

@@ -0,0 +1,37 @@
+// 在后端API中使用
+const FabricClient = require('./fabric-client');
+
+// 在评论发布API中调用
+app.post('/api/reviews', async (req, res) => {
+    const { content, userId, spotId } = req.body;
+    const reviewId = `review_${Date.now()}`;
+    
+    const fabricClient = new FabricClient();
+    const result = await fabricClient.submitReview(reviewId, userId, spotId, content);
+    
+    if (result.success) {
+        // 同时将评论原文存入传统数据库
+        await saveToDatabase({
+            reviewId,
+            userId, 
+            spotId,
+            content,
+            blockchainHash: result.hash,
+            timestamp: new Date()
+        });
+        
+        res.json({ success: true, reviewId, blockchainTx: result });
+    } else {
+        res.status(500).json({ success: false, error: result.error });
+    }
+});
+
+// 验证评论API
+app.get('/api/reviews/:reviewId/verify', async (req, res) => {
+    const { reviewId } = req.params;
+    
+    const fabricClient = new FabricClient();
+    const result = await fabricClient.verifyReview(reviewId);
+    
+    res.json(result);
+});

travel-backend/backend-materials/README.md

@@ -0,0 +1,18 @@
+# Fabric 后端连接材料
+
+## 文件说明
+- `connection.yaml` - 网络连接配置文件
+- `wallet/` - 身份证书目录
+  - `cert.pem` - 管理员证书（由 Admin@org1.example.com-cert.pem 重命名）
+  - `priv_sk` - 管理员私钥
+- `organizations/` - TLS证书目录（用于安全连接）
+
+## 使用方式
+1. 将整个 backend-materials 目录放在后端项目根目录
+2. 在代码中引用相应的证书文件
+3. 确保连接配置文件中的路径指向正确的证书位置
+
+## 安全提醒
+- 私钥文件 `priv_sk` 需要妥善保管
+- 不要将私钥提交到版本控制系统
+- 生产环境需要重新生成证书

travel-backend/backend-materials/connection.yaml

@@ -0,0 +1,44 @@
+name: "test-network"
+version: "1.0.0"
+client:
+  organization: Org1
+  connection:
+    timeout:
+      peer:
+        endorser: 300
+      orderer: 300
+
+organizations:
+  Org1:
+    mspid: Org1MSP
+    peers:
+      - peer0.org1.example.com
+
+peers:
+  peer0.org1.example.com:
+    url: grpc://localhost:7051
+    grpcOptions:
+      ssl-target-name-override: peer0.org1.example.com
+      hostnameOverride: peer0.org1.example.com
+    tlsCACerts:
+      path: /home/xwc/go/src/github.com/Pluto200407/fabric-samples/test-network/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
+
+orderers:
+  orderer.example.com:
+    url: grpc://localhost:7050
+    grpcOptions:
+      ssl-target-name-override: orderer.example.com
+      hostnameOverride: orderer.example.com
+    tlsCACerts:
+      path: /home/xwc/go/src/github.com/Pluto200407/fabric-samples/test-network/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/tls/ca.crt
+
+channels:
+  mychannel:
+    orderers:
+      - orderer.example.com
+    peers:
+      peer0.org1.example.com:
+        endorsingPeer: true
+        chaincodeQuery: true
+        ledgerQuery: true
+        eventSource: true

travel-backend/backend-materials/wallet/cert.pem

@@ -0,0 +1,14 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

travel-backend/backend-materials/wallet/priv_sk

@@ -0,0 +1,5 @@
+-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg8w7OdT3ZqZvP/CEB
+gkRenrKJClD0L5+s5DXRodoUQBihRANCAARGmt+4HqX2r0lTxCnt9h7dcEiiAu4X
+YJ7Lp0wKUz80pWyM5tp8zCmvQ/hfy0KX4rNxDj9qWqZMGXAL4ENN0gB6
+-----END PRIVATE KEY-----

travel-backend/backend-materials/wallet/tlsca.org1.example.com-cert.pem

@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

travel-backend/fabric-client.js

@@ -0,0 +1,267 @@
+const { Gateway, Wallets } = require('fabric-network');
+const fs = require('fs');
+const path = require('path');
+const yaml = require('js-yaml');
+
+class FabricClient {
+    constructor(networkIp, channelName, chaincodeName, walletPath) {
+        this.gateway = new Gateway();
+        this.connected = false;
+        this.networkIp = networkIp;
+        this.channelName = channelName;
+        this.chaincodeName = chaincodeName;
+        // 修复1：标准化Windows路径（处理反斜杠和空格问题）
+        this.walletPath = path.resolve(walletPath); // 关键：将传入的路径转为绝对路径
+    }
+
+    async connect() {
+        try {
+            // 1. 读取连接配置文件（支持绝对路径和相对路径）
+            let ccpPath;
+            // 检查传入的是否为绝对路径，否则按相对路径处理
+            if (path.isAbsolute('backend-materials/connection.yaml')) {
+                ccpPath = 'backend-materials/connection.yaml';
+            } else {
+                ccpPath = path.resolve(__dirname, 'backend-materials/connection.yaml');
+            }
+
+            if (!fs.existsSync(ccpPath)) {
+                throw new Error(`连接配置文件不存在: ${ccpPath}\n请确认backend-materials文件夹是否在项目根目录`);
+            }
+            let ccp = yaml.load(fs.readFileSync(ccpPath, 'utf8'));
+
+            // 2. 替换connection.yaml中的IP（支持带端口的IP，如192.168.170.121:7051）
+            if (this.networkIp) {
+                // 提取IP（去掉可能的端口）
+                const ip = this.networkIp.split(':')[0];
+                // 替换Peer节点
+                if (ccp.organizations.Org1?.peers) {
+                    ccp.organizations.Org1.peers.forEach(peer => {
+                        if (ccp.peers[peer]) {
+                            ccp.peers[peer].url = ccp.peers[peer].url.replace('localhost', ip);
+                        }
+                    });
+                }
+                // 替换Orderer节点
+                if (ccp.orderers) {
+                    Object.keys(ccp.orderers).forEach(orderer => {
+                        ccp.orderers[orderer].url = ccp.orderers[orderer].url.replace('localhost', ip);
+                    });
+                }
+            }
+
+            // 3. 验证并加载证书（增加详细错误提示）
+            if (!fs.existsSync(this.walletPath)) {
+                throw new Error(`证书目录不存在: ${this.walletPath}\n请检查路径是否包含空格或特殊字符`);
+            }
+
+            const wallet = await Wallets.newFileSystemWallet(this.walletPath);
+            const identityLabel = 'admin';
+            const identityExists = await wallet.get(identityLabel);
+
+            if (!identityExists) {
+                // 检查目录下是否有证书文件
+                const certPath = path.join(this.walletPath, 'cert.pem');
+                const keyPath = path.join(this.walletPath, 'priv_sk');
+                const hasCert = fs.existsSync(certPath);
+                const hasKey = fs.existsSync(keyPath);
+
+                throw new Error(`证书不存在（标识: ${identityLabel}）\n` +
+                    `目录: ${this.walletPath}\n` +
+                    `cert.pem存在: ${hasCert}\n` +
+                    `priv_sk存在: ${hasKey}`);
+            }
+
+            // 4. 连接到区块链网络（优化配置）
+            await this.gateway.connect(ccp, {
+                wallet,
+                identity: identityLabel,
+                discovery: {
+                    enabled: true,
+                    asLocalhost: this.networkIp.includes('localhost') || this.networkIp.includes('127.0.0.1')
+                } // 本地节点自动适配
+            });
+
+            this.connected = true;
+            console.log('成功连接到Fabric网络');
+
+        } catch (error) {
+            console.error(`连接失败: ${error.message}`);
+            throw error;
+        }
+    }
+
+    // 提交评论到区块链
+    async submitReview(reviewId, userId, spotId, content) {
+        if (!this.connected) {
+            await this.connect();
+        }
+
+        try {
+            const network = await this.gateway.getNetwork(this.channelName);
+            const contract = network.getContract(this.chaincodeName);
+
+            // 计算哈希值（处理空内容）
+            const crypto = require('crypto');
+            const hashValue = crypto.createHash('sha256')
+                .update(content || '') // 避免空内容报错
+                .digest('hex');
+
+            // 调用链码（增加参数校验）
+            if (!reviewId || !userId || !spotId) {
+                throw new Error('评论ID、用户ID、景点ID不能为空');
+            }
+
+            const transactionResponse = await contract.submitTransaction(
+                'SubmitReview',
+                reviewId,
+                userId,
+                spotId,
+                hashValue
+            );
+            console.log(`评论 ${reviewId} 已成功提交到区块链`);
+
+            return {
+                success: true,
+                reviewId: reviewId,
+                transactionId: transactionResponse.toString(),
+                hash: hashValue,
+                message: '评论已成功提交到区块链'
+            };
+
+        } catch (error) {
+            console.error(`提交评论失败: ${error.message}`);
+            return {
+                success: false,
+                error: error.message
+            };
+        }
+    }
+
+    // 验证区块链上的评论
+    async verifyReview(reviewId) {
+        if (!this.connected) {
+            await this.connect();
+        }
+
+        try {
+            if (!reviewId) {
+                throw new Error('评论ID不能为空');
+            }
+
+            const network = await this.gateway.getNetwork(this.channelName);
+            const contract = network.getContract(this.chaincodeName);
+            const result = await contract.evaluateTransaction('VerifyReview', reviewId);
+            const reviewInfo = JSON.parse(result.toString());
+
+            return {
+                success: true,
+                verified: true,
+                review: reviewInfo
+            };
+
+        } catch (error) {
+            console.error(`验证评论失败: ${error.message}`);
+            return {
+                success: false,
+                verified: false,
+                error: error.message
+            };
+        }
+    }
+
+    // 获取区块链上的所有评论
+    async getAllReviews() {
+        if (!this.connected) {
+            await this.connect();
+        }
+
+        try {
+            const network = await this.gateway.getNetwork(this.channelName);
+            const contract = network.getContract(this.chaincodeName);
+            const result = await contract.evaluateTransaction('GetAllReviews');
+            const reviews = JSON.parse(result.toString());
+
+            return {
+                success: true,
+                reviews: reviews
+            };
+
+        } catch (error) {
+            console.error(`获取评论列表失败: ${error.message}`);
+            return {
+                success: false,
+                error: error.message
+            };
+        }
+    }
+
+    disconnect() {
+        if (this.connected) {
+            this.gateway.disconnect();
+            this.connected = false;
+            console.log('已断开Fabric连接');
+        }
+    }
+}
+
+// 命令行调用入口（修复参数解析顺序）
+async function main() {
+    const args = process.argv.slice(2);
+    if (args.length < 1) {
+        console.error('用法: node fabric-client.js <操作类型> <networkIp> <channelName> <chaincodeName> <walletPath> [业务参数...]');
+        console.error('示例: node fabric-client.js submitReview 192.168.170.121 mychannel review "C:\\path\\to\\wallet" review1 user1 spot1 "好评"');
+        process.exit(1);
+    }
+
+    const operation = args[0];
+    // 修复2：严格按照顺序解析参数（operation, networkIp, channelName, chaincodeName, walletPath）
+    if (args.length < 5) {
+        console.error('参数不足！至少需要：操作类型、networkIp、channelName、chaincodeName、walletPath');
+        process.exit(1);
+    }
+    const [networkIp, channelName, chaincodeName, walletPath] = args.slice(1, 5);
+    const fabricClient = new FabricClient(networkIp, channelName, chaincodeName, walletPath);
+
+    try {
+        switch (operation) {
+            case 'submitReview': {
+                if (args.length < 9) {
+                    console.error('submitReview需要参数：reviewId, userId, spotId, content');
+                    process.exit(1);
+                }
+                const [reviewId, userId, spotId, content] = args.slice(5, 9);
+                const result = await fabricClient.submitReview(reviewId, userId, spotId, content);
+                console.log(JSON.stringify(result));
+                break;
+            }
+            case 'verifyReview': {
+                if (args.length < 6) {
+                    console.error('verifyReview需要参数：reviewId');
+                    process.exit(1);
+                }
+                const [reviewId] = args.slice(5, 6);
+                const result = await fabricClient.verifyReview(reviewId);
+                console.log(JSON.stringify(result));
+                break;
+            }
+            case 'getAllReviews': {
+                const result = await fabricClient.getAllReviews();
+                console.log(JSON.stringify(result));
+                break;
+            }
+            default:
+                console.error('未知操作类型: 支持 submitReview, verifyReview, getAllReviews');
+                process.exit(1);
+        }
+    } catch (error) {
+        console.error(JSON.stringify({ success: false, error: error.message }));
+    } finally {
+        fabricClient.disconnect();
+        process.exit(0);
+    }
+}
+
+main();
+
+module.exports = FabricClient;

travel-backend/node_modules/.bin/js-yaml

@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../js-yaml/bin/js-yaml.js" "$@"
+else 
+  exec node  "$basedir/../js-yaml/bin/js-yaml.js" "$@"
+fi

travel-backend/node_modules/.bin/js-yaml.cmd

@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\js-yaml\bin\js-yaml.js" %*

travel-backend/node_modules/.bin/js-yaml.ps1

@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../js-yaml/bin/js-yaml.js" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../js-yaml/bin/js-yaml.js" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../js-yaml/bin/js-yaml.js" $args
+  } else {
+    & "node$exe"  "$basedir/../js-yaml/bin/js-yaml.js" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret

travel-backend/node_modules/.bin/proto-loader-gen-types

@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../@grpc/proto-loader/build/bin/proto-loader-gen-types.js" "$@"
+else 
+  exec node  "$basedir/../@grpc/proto-loader/build/bin/proto-loader-gen-types.js" "$@"
+fi

travel-backend/node_modules/.bin/proto-loader-gen-types.cmd

@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\@grpc\proto-loader\build\bin\proto-loader-gen-types.js" %*

travel-backend/node_modules/.bin/proto-loader-gen-types.ps1

@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../@grpc/proto-loader/build/bin/proto-loader-gen-types.js" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../@grpc/proto-loader/build/bin/proto-loader-gen-types.js" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../@grpc/proto-loader/build/bin/proto-loader-gen-types.js" $args
+  } else {
+    & "node$exe"  "$basedir/../@grpc/proto-loader/build/bin/proto-loader-gen-types.js" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret

travel-backend/node_modules/@grpc/grpc-js/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+
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+
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+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
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+
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+
+   END OF TERMS AND CONDITIONS
+
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+
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+       http://www.apache.org/licenses/LICENSE-2.0
+
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+   See the License for the specific language governing permissions and
+   limitations under the License.

travel-backend/node_modules/@grpc/grpc-js/README.md

@@ -0,0 +1,79 @@
+# Pure JavaScript gRPC Client
+
+## Installation
+
+Node 12 is recommended. The exact set of compatible Node versions can be found in the `engines` field of the `package.json` file.
+
+```sh
+npm install @grpc/grpc-js
+```
+
+## Documentation
+
+Documentation specifically for the `@grpc/grpc-js` package is currently not available. However, [documentation is available for the `grpc` package](https://grpc.github.io/grpc/node/grpc.html), and the two packages contain mostly the same interface. There are a few notable differences, however, and these differences are noted in the "Migrating from grpc" section below.
+
+## Features
+
+- Clients
+- Automatic reconnection
+- Servers
+- Streaming
+- Metadata
+- Partial compression support: clients can compress and decompress messages, and servers can decompress request messages
+- Pick first and round robin load balancing policies
+- Client Interceptors
+- Connection Keepalives
+- HTTP Connect support (proxies)
+
+If you need a feature from the `grpc` package that is not provided by the `@grpc/grpc-js`, please file a feature request with that information.
+
+This library does not directly handle `.proto` files. To use `.proto` files with this library we recommend using the `@grpc/proto-loader` package.
+
+## Migrating from [`grpc`](https://www.npmjs.com/package/grpc)
+
+`@grpc/grpc-js` is almost a drop-in replacement for `grpc`, but you may need to make a few code changes to use it:
+
+- If you are currently loading `.proto` files using `grpc.load`, that function is not available in this library. You should instead load your `.proto` files using `@grpc/proto-loader` and load the resulting package definition objects into `@grpc/grpc-js` using `grpc.loadPackageDefinition`.
+- If you are currently loading packages generated by `grpc-tools`, you should instead generate your files using the `generate_package_definition` option in `grpc-tools`, then load the object exported by the generated file into `@grpc/grpc-js` using `grpc.loadPackageDefinition`.
+- If you have a server and you are using `Server#bind` to bind ports, you will need to use `Server#bindAsync` instead.
+- If you are using any channel options supported in `grpc` but not supported in `@grpc/grpc-js`, you may need to adjust your code to handle the different behavior. Refer to [the list of supported options](#supported-channel-options) below.
+- Refer to the [detailed package comparison](https://github.com/grpc/grpc-node/blob/master/PACKAGE-COMPARISON.md) for more details on the differences between `grpc` and `@grpc/grpc-js`.
+
+## Supported Channel Options
+Many channel arguments supported in `grpc` are not supported in `@grpc/grpc-js`. The channel arguments supported by `@grpc/grpc-js` are:
+  - `grpc.ssl_target_name_override`
+  - `grpc.primary_user_agent`
+  - `grpc.secondary_user_agent`
+  - `grpc.default_authority`
+  - `grpc.keepalive_time_ms`
+  - `grpc.keepalive_timeout_ms`
+  - `grpc.keepalive_permit_without_calls`
+  - `grpc.service_config`
+  - `grpc.max_concurrent_streams`
+  - `grpc.initial_reconnect_backoff_ms`
+  - `grpc.max_reconnect_backoff_ms`
+  - `grpc.use_local_subchannel_pool`
+  - `grpc.max_send_message_length`
+  - `grpc.max_receive_message_length`
+  - `grpc.enable_http_proxy`
+  - `grpc.default_compression_algorithm`
+  - `grpc.enable_channelz`
+  - `grpc.dns_min_time_between_resolutions_ms`
+  - `grpc.enable_retries`
+  - `grpc.per_rpc_retry_buffer_size`
+  - `grpc.retry_buffer_size`
+  - `grpc.service_config_disable_resolution`
+  - `grpc.client_idle_timeout_ms`
+  - `grpc-node.max_session_memory`
+  - `grpc-node.tls_enable_trace`
+  - `channelOverride`
+  - `channelFactoryOverride`
+
+## Some Notes on API Guarantees
+
+The public API of this library follows semantic versioning, with some caveats:
+
+- Some methods are prefixed with an underscore. These methods are internal and should not be considered part of the public API.
+- The class `Call` is only exposed due to limitations of TypeScript. It should not be considered part of the public API.
+- In general, any API that is exposed by this library but is not exposed by the `grpc` library is likely an error and should not be considered part of the public API.
+- The `grpc.experimental` namespace contains APIs that have not stabilized. Any API in that namespace may break in any minor version update.

travel-backend/node_modules/@grpc/grpc-js/package.json

@@ -0,0 +1,85 @@
+{
+  "name": "@grpc/grpc-js",
+  "version": "1.9.15",
+  "description": "gRPC Library for Node - pure JS implementation",
+  "homepage": "https://grpc.io/",
+  "repository": "https://github.com/grpc/grpc-node/tree/master/packages/grpc-js",
+  "main": "build/src/index.js",
+  "engines": {
+    "node": "^8.13.0 || >=10.10.0"
+  },
+  "keywords": [],
+  "author": {
+    "name": "Google Inc."
+  },
+  "types": "build/src/index.d.ts",
+  "license": "Apache-2.0",
+  "devDependencies": {
+    "@types/gulp": "^4.0.6",
+    "@types/gulp-mocha": "0.0.32",
+    "@types/lodash": "^4.14.186",
+    "@types/mocha": "^5.2.6",
+    "@types/ncp": "^2.0.1",
+    "@types/pify": "^3.0.2",
+    "@types/semver": "^7.3.9",
+    "@typescript-eslint/eslint-plugin": "^5.59.11",
+    "@typescript-eslint/parser": "^5.59.11",
+    "@typescript-eslint/typescript-estree": "^5.59.11",
+    "clang-format": "^1.0.55",
+    "eslint": "^8.42.0",
+    "eslint-config-prettier": "^8.8.0",
+    "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-prettier": "^4.2.1",
+    "execa": "^2.0.3",
+    "gulp": "^4.0.2",
+    "gulp-mocha": "^6.0.0",
+    "lodash": "^4.17.4",
+    "madge": "^5.0.1",
+    "mocha-jenkins-reporter": "^0.4.1",
+    "ncp": "^2.0.0",
+    "pify": "^4.0.1",
+    "prettier": "^2.8.8",
+    "rimraf": "^3.0.2",
+    "semver": "^7.3.5",
+    "ts-node": "^10.9.1",
+    "typescript": "^5.1.3"
+  },
+  "contributors": [
+    {
+      "name": "Google Inc."
+    }
+  ],
+  "scripts": {
+    "build": "npm run compile",
+    "clean": "rimraf ./build",
+    "compile": "tsc -p .",
+    "format": "clang-format -i -style=\"{Language: JavaScript, BasedOnStyle: Google, ColumnLimit: 80}\" src/*.ts test/*.ts",
+    "lint": "eslint src/*.ts test/*.ts",
+    "prepare": "npm run generate-types && npm run compile",
+    "test": "gulp test",
+    "check": "npm run lint",
+    "fix": "eslint --fix src/*.ts test/*.ts",
+    "pretest": "npm run generate-types && npm run generate-test-types && npm run compile",
+    "posttest": "npm run check && madge -c ./build/src",
+    "generate-types": "proto-loader-gen-types --keepCase --longs String --enums String --defaults --oneofs --includeComments --includeDirs proto/ --include-dirs test/fixtures/ -O src/generated/ --grpcLib ../index channelz.proto",
+    "generate-test-types": "proto-loader-gen-types --keepCase --longs String --enums String --defaults --oneofs --includeComments --include-dirs test/fixtures/ -O test/generated/ --grpcLib ../../src/index test_service.proto"
+  },
+  "dependencies": {
+    "@grpc/proto-loader": "^0.7.8",
+    "@types/node": ">=12.12.47"
+  },
+  "files": [
+    "src/**/*.ts",
+    "build/src/**/*.{js,d.ts,js.map}",
+    "proto/*.proto",
+    "LICENSE",
+    "deps/envoy-api/envoy/api/v2/**/*.proto",
+    "deps/envoy-api/envoy/config/**/*.proto",
+    "deps/envoy-api/envoy/service/**/*.proto",
+    "deps/envoy-api/envoy/type/**/*.proto",
+    "deps/udpa/udpa/**/*.proto",
+    "deps/googleapis/google/api/*.proto",
+    "deps/googleapis/google/rpc/*.proto",
+    "deps/protoc-gen-validate/validate/**/*.proto"
+  ]
+}

travel-backend/node_modules/@grpc/grpc-js/proto/channelz.proto

@@ -0,0 +1,564 @@
+// Copyright 2018 The 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.
+
+// This file defines an interface for exporting monitoring information
+// out of gRPC servers.  See the full design at
+// https://github.com/grpc/proposal/blob/master/A14-channelz.md
+//
+// The canonical version of this proto can be found at
+// https://github.com/grpc/grpc-proto/blob/master/grpc/channelz/v1/channelz.proto
+
+syntax = "proto3";
+
+package grpc.channelz.v1;
+
+import "google/protobuf/any.proto";
+import "google/protobuf/duration.proto";
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/wrappers.proto";
+
+option go_package = "google.golang.org/grpc/channelz/grpc_channelz_v1";
+option java_multiple_files = true;
+option java_package = "io.grpc.channelz.v1";
+option java_outer_classname = "ChannelzProto";
+
+// Channel is a logical grouping of channels, subchannels, and sockets.
+message Channel {
+  // The identifier for this channel. This should bet set.
+  ChannelRef ref = 1;
+  // Data specific to this channel.
+  ChannelData data = 2;
+  // At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+
+  // There are no ordering guarantees on the order of channel refs.
+  // There may not be cycles in the ref graph.
+  // A channel ref may be present in more than one channel or subchannel.
+  repeated ChannelRef channel_ref = 3;
+
+  // At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+  // There are no ordering guarantees on the order of subchannel refs.
+  // There may not be cycles in the ref graph.
+  // A sub channel ref may be present in more than one channel or subchannel.
+  repeated SubchannelRef subchannel_ref = 4;
+
+  // There are no ordering guarantees on the order of sockets.
+  repeated SocketRef socket_ref = 5;
+}
+
+// Subchannel is a logical grouping of channels, subchannels, and sockets.
+// A subchannel is load balanced over by it's ancestor
+message Subchannel {
+  // The identifier for this channel.
+  SubchannelRef ref = 1;
+  // Data specific to this channel.
+  ChannelData data = 2;
+  // At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+
+  // There are no ordering guarantees on the order of channel refs.
+  // There may not be cycles in the ref graph.
+  // A channel ref may be present in more than one channel or subchannel.
+  repeated ChannelRef channel_ref = 3;
+
+  // At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+  // There are no ordering guarantees on the order of subchannel refs.
+  // There may not be cycles in the ref graph.
+  // A sub channel ref may be present in more than one channel or subchannel.
+  repeated SubchannelRef subchannel_ref = 4;
+
+  // There are no ordering guarantees on the order of sockets.
+  repeated SocketRef socket_ref = 5;
+}
+
+// These come from the specified states in this document:
+// https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md
+message ChannelConnectivityState {
+  enum State {
+    UNKNOWN = 0;
+    IDLE = 1;
+    CONNECTING = 2;
+    READY = 3;
+    TRANSIENT_FAILURE = 4;
+    SHUTDOWN = 5;
+  }
+  State state = 1;
+}
+
+// Channel data is data related to a specific Channel or Subchannel.
+message ChannelData {
+  // The connectivity state of the channel or subchannel.  Implementations
+  // should always set this.
+  ChannelConnectivityState state = 1;
+
+  // The target this channel originally tried to connect to.  May be absent
+  string target = 2;
+
+  // A trace of recent events on the channel.  May be absent.
+  ChannelTrace trace = 3;
+
+  // The number of calls started on the channel
+  int64 calls_started = 4;
+  // The number of calls that have completed with an OK status
+  int64 calls_succeeded = 5;
+  // The number of calls that have completed with a non-OK status
+  int64 calls_failed = 6;
+
+  // The last time a call was started on the channel.
+  google.protobuf.Timestamp last_call_started_timestamp = 7;
+}
+
+// A trace event is an interesting thing that happened to a channel or
+// subchannel, such as creation, address resolution, subchannel creation, etc.
+message ChannelTraceEvent {
+  // High level description of the event.
+  string description = 1;
+  // The supported severity levels of trace events.
+  enum Severity {
+    CT_UNKNOWN = 0;
+    CT_INFO = 1;
+    CT_WARNING = 2;
+    CT_ERROR = 3;
+  }
+  // the severity of the trace event
+  Severity severity = 2;
+  // When this event occurred.
+  google.protobuf.Timestamp timestamp = 3;
+  // ref of referenced channel or subchannel.
+  // Optional, only present if this event refers to a child object. For example,
+  // this field would be filled if this trace event was for a subchannel being
+  // created.
+  oneof child_ref {
+    ChannelRef channel_ref = 4;
+    SubchannelRef subchannel_ref = 5;
+  }
+}
+
+// ChannelTrace represents the recent events that have occurred on the channel.
+message ChannelTrace {
+  // Number of events ever logged in this tracing object. This can differ from
+  // events.size() because events can be overwritten or garbage collected by
+  // implementations.
+  int64 num_events_logged = 1;
+  // Time that this channel was created.
+  google.protobuf.Timestamp creation_timestamp = 2;
+  // List of events that have occurred on this channel.
+  repeated ChannelTraceEvent events = 3;
+}
+
+// ChannelRef is a reference to a Channel.
+message ChannelRef {
+  // The globally unique id for this channel.  Must be a positive number.
+  int64 channel_id = 1;
+  // An optional name associated with the channel.
+  string name = 2;
+  // Intentionally don't use field numbers from other refs.
+  reserved 3, 4, 5, 6, 7, 8;
+}
+
+// SubchannelRef is a reference to a Subchannel.
+message SubchannelRef {
+  // The globally unique id for this subchannel.  Must be a positive number.
+  int64 subchannel_id = 7;
+  // An optional name associated with the subchannel.
+  string name = 8;
+  // Intentionally don't use field numbers from other refs.
+  reserved 1, 2, 3, 4, 5, 6;
+}
+
+// SocketRef is a reference to a Socket.
+message SocketRef {
+  // The globally unique id for this socket.  Must be a positive number.
+  int64 socket_id = 3;
+  // An optional name associated with the socket.
+  string name = 4;
+  // Intentionally don't use field numbers from other refs.
+  reserved 1, 2, 5, 6, 7, 8;
+}
+
+// ServerRef is a reference to a Server.
+message ServerRef {
+  // A globally unique identifier for this server.  Must be a positive number.
+  int64 server_id = 5;
+  // An optional name associated with the server.
+  string name = 6;
+  // Intentionally don't use field numbers from other refs.
+  reserved 1, 2, 3, 4, 7, 8;
+}
+
+// Server represents a single server.  There may be multiple servers in a single
+// program.
+message Server {
+  // The identifier for a Server.  This should be set.
+  ServerRef ref = 1;
+  // The associated data of the Server.
+  ServerData data = 2;
+
+  // The sockets that the server is listening on.  There are no ordering
+  // guarantees.  This may be absent.
+  repeated SocketRef listen_socket = 3;
+}
+
+// ServerData is data for a specific Server.
+message ServerData {
+  // A trace of recent events on the server.  May be absent.
+  ChannelTrace trace = 1;
+
+  // The number of incoming calls started on the server
+  int64 calls_started = 2;
+  // The number of incoming calls that have completed with an OK status
+  int64 calls_succeeded = 3;
+  // The number of incoming calls that have a completed with a non-OK status
+  int64 calls_failed = 4;
+
+  // The last time a call was started on the server.
+  google.protobuf.Timestamp last_call_started_timestamp = 5;
+}
+
+// Information about an actual connection.  Pronounced "sock-ay".
+message Socket {
+  // The identifier for the Socket.
+  SocketRef ref = 1;
+
+  // Data specific to this Socket.
+  SocketData data = 2;
+  // The locally bound address.
+  Address local = 3;
+  // The remote bound address.  May be absent.
+  Address remote = 4;
+  // Security details for this socket.  May be absent if not available, or
+  // there is no security on the socket.
+  Security security = 5;
+
+  // Optional, represents the name of the remote endpoint, if different than
+  // the original target name.
+  string remote_name = 6;
+}
+
+// SocketData is data associated for a specific Socket.  The fields present
+// are specific to the implementation, so there may be minor differences in
+// the semantics.  (e.g. flow control windows)
+message SocketData {
+  // The number of streams that have been started.
+  int64 streams_started = 1;
+  // The number of streams that have ended successfully:
+  // On client side, received frame with eos bit set;
+  // On server side, sent frame with eos bit set.
+  int64 streams_succeeded = 2;
+  // The number of streams that have ended unsuccessfully:
+  // On client side, ended without receiving frame with eos bit set;
+  // On server side, ended without sending frame with eos bit set.
+  int64 streams_failed = 3;
+  // The number of grpc messages successfully sent on this socket.
+  int64 messages_sent = 4;
+  // The number of grpc messages received on this socket.
+  int64 messages_received = 5;
+
+  // The number of keep alives sent.  This is typically implemented with HTTP/2
+  // ping messages.
+  int64 keep_alives_sent = 6;
+
+  // The last time a stream was created by this endpoint.  Usually unset for
+  // servers.
+  google.protobuf.Timestamp last_local_stream_created_timestamp = 7;
+  // The last time a stream was created by the remote endpoint.  Usually unset
+  // for clients.
+  google.protobuf.Timestamp last_remote_stream_created_timestamp = 8;
+
+  // The last time a message was sent by this endpoint.
+  google.protobuf.Timestamp last_message_sent_timestamp = 9;
+  // The last time a message was received by this endpoint.
+  google.protobuf.Timestamp last_message_received_timestamp = 10;
+
+  // The amount of window, granted to the local endpoint by the remote endpoint.
+  // This may be slightly out of date due to network latency.  This does NOT
+  // include stream level or TCP level flow control info.
+  google.protobuf.Int64Value local_flow_control_window = 11;
+
+  // The amount of window, granted to the remote endpoint by the local endpoint.
+  // This may be slightly out of date due to network latency.  This does NOT
+  // include stream level or TCP level flow control info.
+  google.protobuf.Int64Value  remote_flow_control_window = 12;
+
+  // Socket options set on this socket.  May be absent if 'summary' is set
+  // on GetSocketRequest.
+  repeated SocketOption option = 13;
+}
+
+// Address represents the address used to create the socket.
+message Address {
+  message TcpIpAddress {
+    // Either the IPv4 or IPv6 address in bytes.  Will be either 4 bytes or 16
+    // bytes in length.
+    bytes ip_address = 1;
+    // 0-64k, or -1 if not appropriate.
+    int32 port = 2;
+  }
+  // A Unix Domain Socket address.
+  message UdsAddress {
+    string filename = 1;
+  }
+  // An address type not included above.
+  message OtherAddress {
+    // The human readable version of the value.  This value should be set.
+    string name = 1;
+    // The actual address message.
+    google.protobuf.Any value = 2;
+  }
+
+  oneof address {
+    TcpIpAddress tcpip_address = 1;
+    UdsAddress uds_address = 2;
+    OtherAddress other_address = 3;
+  }
+}
+
+// Security represents details about how secure the socket is.
+message Security {
+  message Tls {
+    oneof cipher_suite {
+      // The cipher suite name in the RFC 4346 format:
+      // https://tools.ietf.org/html/rfc4346#appendix-C
+      string standard_name = 1;
+      // Some other way to describe the cipher suite if
+      // the RFC 4346 name is not available.
+      string other_name = 2;
+    }
+    // the certificate used by this endpoint.
+    bytes local_certificate = 3;
+    // the certificate used by the remote endpoint.
+    bytes remote_certificate = 4;
+  }
+  message OtherSecurity {
+    // The human readable version of the value.
+    string name = 1;
+    // The actual security details message.
+    google.protobuf.Any value = 2;
+  }
+  oneof model {
+    Tls tls = 1;
+    OtherSecurity other = 2;
+  }
+}
+
+// SocketOption represents socket options for a socket.  Specifically, these
+// are the options returned by getsockopt().
+message SocketOption {
+  // The full name of the socket option.  Typically this will be the upper case
+  // name, such as "SO_REUSEPORT".
+  string name = 1;
+  // The human readable value of this socket option.  At least one of value or
+  // additional will be set.
+  string value = 2;
+  // Additional data associated with the socket option.  At least one of value
+  // or additional will be set.
+  google.protobuf.Any additional = 3;
+}
+
+// For use with SocketOption's additional field.  This is primarily used for
+// SO_RCVTIMEO and SO_SNDTIMEO
+message SocketOptionTimeout {
+  google.protobuf.Duration duration = 1;
+}
+
+// For use with SocketOption's additional field.  This is primarily used for
+// SO_LINGER.
+message SocketOptionLinger {
+  // active maps to `struct linger.l_onoff`
+  bool active = 1;
+  // duration maps to `struct linger.l_linger`
+  google.protobuf.Duration duration = 2;
+}
+
+// For use with SocketOption's additional field.  Tcp info for
+// SOL_TCP and TCP_INFO.
+message SocketOptionTcpInfo {
+  uint32 tcpi_state = 1;
+
+  uint32 tcpi_ca_state = 2;
+  uint32 tcpi_retransmits = 3;
+  uint32 tcpi_probes = 4;
+  uint32 tcpi_backoff = 5;
+  uint32 tcpi_options = 6;
+  uint32 tcpi_snd_wscale = 7;
+  uint32 tcpi_rcv_wscale = 8;
+
+  uint32 tcpi_rto = 9;
+  uint32 tcpi_ato = 10;
+  uint32 tcpi_snd_mss = 11;
+  uint32 tcpi_rcv_mss = 12;
+
+  uint32 tcpi_unacked = 13;
+  uint32 tcpi_sacked = 14;
+  uint32 tcpi_lost = 15;
+  uint32 tcpi_retrans = 16;
+  uint32 tcpi_fackets = 17;
+
+  uint32 tcpi_last_data_sent = 18;
+  uint32 tcpi_last_ack_sent = 19;
+  uint32 tcpi_last_data_recv = 20;
+  uint32 tcpi_last_ack_recv = 21;
+
+  uint32 tcpi_pmtu = 22;
+  uint32 tcpi_rcv_ssthresh = 23;
+  uint32 tcpi_rtt = 24;
+  uint32 tcpi_rttvar = 25;
+  uint32 tcpi_snd_ssthresh = 26;
+  uint32 tcpi_snd_cwnd = 27;
+  uint32 tcpi_advmss = 28;
+  uint32 tcpi_reordering = 29;
+}
+
+// Channelz is a service exposed by gRPC servers that provides detailed debug
+// information.
+service Channelz {
+  // Gets all root channels (i.e. channels the application has directly
+  // created). This does not include subchannels nor non-top level channels.
+  rpc GetTopChannels(GetTopChannelsRequest) returns (GetTopChannelsResponse);
+  // Gets all servers that exist in the process.
+  rpc GetServers(GetServersRequest) returns (GetServersResponse);
+  // Returns a single Server, or else a NOT_FOUND code.
+  rpc GetServer(GetServerRequest) returns (GetServerResponse);
+  // Gets all server sockets that exist in the process.
+  rpc GetServerSockets(GetServerSocketsRequest) returns (GetServerSocketsResponse);
+  // Returns a single Channel, or else a NOT_FOUND code.
+  rpc GetChannel(GetChannelRequest) returns (GetChannelResponse);
+  // Returns a single Subchannel, or else a NOT_FOUND code.
+  rpc GetSubchannel(GetSubchannelRequest) returns (GetSubchannelResponse);
+  // Returns a single Socket or else a NOT_FOUND code.
+  rpc GetSocket(GetSocketRequest) returns (GetSocketResponse);
+}
+
+message GetTopChannelsRequest {
+  // start_channel_id indicates that only channels at or above this id should be
+  // included in the results.
+  // To request the first page, this should be set to 0. To request
+  // subsequent pages, the client generates this value by adding 1 to
+  // the highest seen result ID.
+  int64 start_channel_id = 1;
+
+  // If non-zero, the server will return a page of results containing
+  // at most this many items. If zero, the server will choose a
+  // reasonable page size.  Must never be negative.
+  int64 max_results = 2;
+}
+
+message GetTopChannelsResponse {
+  // list of channels that the connection detail service knows about.  Sorted in
+  // ascending channel_id order.
+  // Must contain at least 1 result, otherwise 'end' must be true.
+  repeated Channel channel = 1;
+  // If set, indicates that the list of channels is the final list.  Requesting
+  // more channels can only return more if they are created after this RPC
+  // completes.
+  bool end = 2;
+}
+
+message GetServersRequest {
+  // start_server_id indicates that only servers at or above this id should be
+  // included in the results.
+  // To request the first page, this must be set to 0. To request
+  // subsequent pages, the client generates this value by adding 1 to
+  // the highest seen result ID.
+  int64 start_server_id = 1;
+
+  // If non-zero, the server will return a page of results containing
+  // at most this many items. If zero, the server will choose a
+  // reasonable page size.  Must never be negative.
+  int64 max_results = 2;
+}
+
+message GetServersResponse {
+  // list of servers that the connection detail service knows about.  Sorted in
+  // ascending server_id order.
+  // Must contain at least 1 result, otherwise 'end' must be true.
+  repeated Server server = 1;
+  // If set, indicates that the list of servers is the final list.  Requesting
+  // more servers will only return more if they are created after this RPC
+  // completes.
+  bool end = 2;
+}
+
+message GetServerRequest {
+  // server_id is the identifier of the specific server to get.
+  int64 server_id = 1;
+}
+
+message GetServerResponse {
+  // The Server that corresponds to the requested server_id.  This field
+  // should be set.
+  Server server = 1;
+}
+
+message GetServerSocketsRequest {
+  int64 server_id = 1;
+  // start_socket_id indicates that only sockets at or above this id should be
+  // included in the results.
+  // To request the first page, this must be set to 0. To request
+  // subsequent pages, the client generates this value by adding 1 to
+  // the highest seen result ID.
+  int64 start_socket_id = 2;
+
+  // If non-zero, the server will return a page of results containing
+  // at most this many items. If zero, the server will choose a
+  // reasonable page size.  Must never be negative.
+  int64 max_results = 3;
+}
+
+message GetServerSocketsResponse {
+  // list of socket refs that the connection detail service knows about.  Sorted in
+  // ascending socket_id order.
+  // Must contain at least 1 result, otherwise 'end' must be true.
+  repeated SocketRef socket_ref = 1;
+  // If set, indicates that the list of sockets is the final list.  Requesting
+  // more sockets will only return more if they are created after this RPC
+  // completes.
+  bool end = 2;
+}
+
+message GetChannelRequest {
+  // channel_id is the identifier of the specific channel to get.
+  int64 channel_id = 1;
+}
+
+message GetChannelResponse {
+  // The Channel that corresponds to the requested channel_id.  This field
+  // should be set.
+  Channel channel = 1;
+}
+
+message GetSubchannelRequest {
+  // subchannel_id is the identifier of the specific subchannel to get.
+  int64 subchannel_id = 1;
+}
+
+message GetSubchannelResponse {
+  // The Subchannel that corresponds to the requested subchannel_id.  This
+  // field should be set.
+  Subchannel subchannel = 1;
+}
+
+message GetSocketRequest {
+  // socket_id is the identifier of the specific socket to get.
+  int64 socket_id = 1;
+
+  // If true, the response will contain only high level information
+  // that is inexpensive to obtain. Fields thay may be omitted are
+  // documented.
+  bool summary = 2;
+}
+
+message GetSocketResponse {
+  // The Socket that corresponds to the requested socket_id.  This field
+  // should be set.
+  Socket socket = 1;
+}

travel-backend/node_modules/@grpc/grpc-js/src/admin.ts

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 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.
+ *
+ */
+
+import { ServiceDefinition } from './make-client';
+import { Server, UntypedServiceImplementation } from './server';
+
+interface GetServiceDefinition {
+  (): ServiceDefinition;
+}
+
+interface GetHandlers {
+  (): UntypedServiceImplementation;
+}
+
+const registeredAdminServices: {
+  getServiceDefinition: GetServiceDefinition;
+  getHandlers: GetHandlers;
+}[] = [];
+
+export function registerAdminService(
+  getServiceDefinition: GetServiceDefinition,
+  getHandlers: GetHandlers
+) {
+  registeredAdminServices.push({ getServiceDefinition, getHandlers });
+}
+
+export function addAdminServicesToServer(server: Server): void {
+  for (const { getServiceDefinition, getHandlers } of registeredAdminServices) {
+    server.addService(getServiceDefinition(), getHandlers());
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/backoff-timeout.ts

@@ -0,0 +1,196 @@
+/*
+ * 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.
+ *
+ */
+
+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: number, max: number) {
+  return Math.random() * (max - min) + min;
+}
+
+export interface BackoffOptions {
+  initialDelay?: number;
+  multiplier?: number;
+  jitter?: number;
+  maxDelay?: number;
+}
+
+export class BackoffTimeout {
+  /**
+   * The delay time at the start, and after each reset.
+   */
+  private readonly initialDelay: number = INITIAL_BACKOFF_MS;
+  /**
+   * The exponential backoff multiplier.
+   */
+  private readonly multiplier: number = BACKOFF_MULTIPLIER;
+  /**
+   * The maximum delay time
+   */
+  private readonly maxDelay: number = MAX_BACKOFF_MS;
+  /**
+   * The maximum fraction by which the delay time can randomly vary after
+   * applying the multiplier.
+   */
+  private readonly jitter: number = BACKOFF_JITTER;
+  /**
+   * The delay time for the next time the timer runs.
+   */
+  private nextDelay: number;
+  /**
+   * The handle of the underlying timer. If running is false, this value refers
+   * to an object representing a timer that has ended, but it can still be
+   * interacted with without error.
+   */
+  private timerId: NodeJS.Timeout;
+  /**
+   * Indicates whether the timer is currently running.
+   */
+  private running = false;
+  /**
+   * Indicates whether the timer should keep the Node process running if no
+   * other async operation is doing so.
+   */
+  private hasRef = true;
+  /**
+   * The time that the currently running timer was started. Only valid if
+   * running is true.
+   */
+  private startTime: Date = new Date();
+  /**
+   * The approximate time that the currently running timer will end. Only valid
+   * if running is true.
+   */
+  private endTime: Date = new Date();
+
+  constructor(private callback: () => void, options?: BackoffOptions) {
+    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);
+  }
+
+  private runTimer(delay: number) {
+    this.endTime = this.startTime;
+    this.endTime.setMilliseconds(this.endTime.getMilliseconds() + this.nextDelay);
+    clearTimeout(this.timerId);
+    this.timerId = setTimeout(() => {
+      this.callback();
+      this.running = false;
+    }, delay);
+    if (!this.hasRef) {
+      this.timerId.unref?.();
+    }
+  }
+
+  /**
+   * Call the callback after the current amount of delay time
+   */
+  runOnce() {
+    this.running = true;
+    this.startTime = new Date();
+    this.runTimer(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. If the timer is still running,
+   * retroactively apply that reset to the current timer.
+   */
+  reset() {
+    this.nextDelay = this.initialDelay;
+    if (this.running) {
+      const now = new Date();
+      const newEndTime = this.startTime;
+      newEndTime.setMilliseconds(newEndTime.getMilliseconds() + this.nextDelay);
+      clearTimeout(this.timerId);
+      if (now < newEndTime) {
+        this.runTimer(newEndTime.getTime() - now.getTime());
+      } else {
+        this.running = false;
+      }
+    }
+  }
+
+  /**
+   * Check whether the timer is currently running.
+   */
+  isRunning() {
+    return this.running;
+  }
+
+  /**
+   * Set that while the timer is running, it should keep the Node process
+   * running.
+   */
+  ref() {
+    this.hasRef = true;
+    this.timerId.ref?.();
+  }
+
+  /**
+   * Set that while the timer is running, it should not keep the Node process
+   * running.
+   */
+  unref() {
+    this.hasRef = false;
+    this.timerId.unref?.();
+  }
+
+  /**
+   * Get the approximate timestamp of when the timer will fire. Only valid if
+   * this.isRunning() is true.
+   */
+  getEndTime() {
+    return this.endTime;
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/call-credentials.ts

@@ -0,0 +1,226 @@
+/*
+ * 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.
+ *
+ */
+
+import { Metadata } from './metadata';
+
+export interface CallMetadataOptions {
+  service_url: string;
+}
+
+export type CallMetadataGenerator = (
+  options: CallMetadataOptions,
+  cb: (err: Error | null, metadata?: Metadata) => void
+) => void;
+
+// google-auth-library pre-v2.0.0 does not have getRequestHeaders
+// but has getRequestMetadata, which is deprecated in v2.0.0
+export interface OldOAuth2Client {
+  getRequestMetadata: (
+    url: string,
+    callback: (
+      err: Error | null,
+      headers?: {
+        [index: string]: string;
+      }
+    ) => void
+  ) => void;
+}
+
+export interface CurrentOAuth2Client {
+  getRequestHeaders: (url?: string) => Promise<{ [index: string]: string }>;
+}
+
+export type OAuth2Client = OldOAuth2Client | CurrentOAuth2Client;
+
+function isCurrentOauth2Client(
+  client: OAuth2Client
+): client is CurrentOAuth2Client {
+  return (
+    'getRequestHeaders' in client &&
+    typeof client.getRequestHeaders === 'function'
+  );
+}
+
+/**
+ * A class that represents a generic method of adding authentication-related
+ * metadata on a per-request basis.
+ */
+export 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 {
+    return new SingleCallCredentials(metadataGenerator);
+  }
+
+  /**
+   * Create a gRPC credential from a Google credential object.
+   * @param googleCredentials The authentication client to use.
+   * @return The resulting CallCredentials object.
+   */
+  static createFromGoogleCredential(
+    googleCredentials: OAuth2Client
+  ): CallCredentials {
+    return CallCredentials.createFromMetadataGenerator((options, callback) => {
+      let getHeaders: Promise<{ [index: string]: string }>;
+      if (isCurrentOauth2Client(googleCredentials)) {
+        getHeaders = googleCredentials.getRequestHeaders(options.service_url);
+      } else {
+        getHeaders = new Promise((resolve, reject) => {
+          googleCredentials.getRequestMetadata(
+            options.service_url,
+            (err, headers) => {
+              if (err) {
+                reject(err);
+                return;
+              }
+              if (!headers) {
+                reject(new Error('Headers not set by metadata plugin'));
+                return;
+              }
+              resolve(headers);
+            }
+          );
+        });
+      }
+      getHeaders.then(
+        headers => {
+          const metadata = new Metadata();
+          for (const key of Object.keys(headers)) {
+            metadata.add(key, headers[key]);
+          }
+          callback(null, metadata);
+        },
+        err => {
+          callback(err);
+        }
+      );
+    });
+  }
+
+  static createEmpty(): CallCredentials {
+    return new EmptyCallCredentials();
+  }
+}
+
+class ComposedCallCredentials extends CallCredentials {
+  constructor(private creds: CallCredentials[]) {
+    super();
+  }
+
+  async generateMetadata(options: CallMetadataOptions): Promise<Metadata> {
+    const base: Metadata = new Metadata();
+    const generated: Metadata[] = await Promise.all(
+      this.creds.map(cred => cred.generateMetadata(options))
+    );
+    for (const gen of generated) {
+      base.merge(gen);
+    }
+    return base;
+  }
+
+  compose(other: CallCredentials): CallCredentials {
+    return new ComposedCallCredentials(this.creds.concat([other]));
+  }
+
+  _equals(other: CallCredentials): boolean {
+    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(private metadataGenerator: CallMetadataGenerator) {
+    super();
+  }
+
+  generateMetadata(options: CallMetadataOptions): Promise<Metadata> {
+    return new Promise<Metadata>((resolve, reject) => {
+      this.metadataGenerator(options, (err, metadata) => {
+        if (metadata !== undefined) {
+          resolve(metadata);
+        } else {
+          reject(err);
+        }
+      });
+    });
+  }
+
+  compose(other: CallCredentials): CallCredentials {
+    return new ComposedCallCredentials([this, other]);
+  }
+
+  _equals(other: CallCredentials): boolean {
+    if (this === other) {
+      return true;
+    }
+    if (other instanceof SingleCallCredentials) {
+      return this.metadataGenerator === other.metadataGenerator;
+    } else {
+      return false;
+    }
+  }
+}
+
+class EmptyCallCredentials extends CallCredentials {
+  generateMetadata(options: CallMetadataOptions): Promise<Metadata> {
+    return Promise.resolve(new Metadata());
+  }
+
+  compose(other: CallCredentials): CallCredentials {
+    return other;
+  }
+
+  _equals(other: CallCredentials): boolean {
+    return other instanceof EmptyCallCredentials;
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/call-interface.ts

@@ -0,0 +1,173 @@
+/*
+ * Copyright 2022 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.
+ *
+ */
+
+import { CallCredentials } from './call-credentials';
+import { Status } from './constants';
+import { Deadline } from './deadline';
+import { Metadata } from './metadata';
+import { ServerSurfaceCall } from './server-call';
+
+export interface CallStreamOptions {
+  deadline: Deadline;
+  flags: number;
+  host: string;
+  parentCall: ServerSurfaceCall | null;
+}
+
+export type PartialCallStreamOptions = Partial<CallStreamOptions>;
+
+export interface StatusObject {
+  code: Status;
+  details: string;
+  metadata: Metadata;
+}
+
+export type PartialStatusObject = Pick<StatusObject, 'code' | 'details'> & {
+  metadata: Metadata | null;
+};
+
+export const enum WriteFlags {
+  BufferHint = 1,
+  NoCompress = 2,
+  WriteThrough = 4,
+}
+
+export interface WriteObject {
+  message: Buffer;
+  flags?: number;
+}
+
+export interface MetadataListener {
+  (metadata: Metadata, next: (metadata: Metadata) => void): void;
+}
+
+export interface MessageListener {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  (message: any, next: (message: any) => void): void;
+}
+
+export interface StatusListener {
+  (status: StatusObject, next: (status: StatusObject) => void): void;
+}
+
+export interface FullListener {
+  onReceiveMetadata: MetadataListener;
+  onReceiveMessage: MessageListener;
+  onReceiveStatus: StatusListener;
+}
+
+export type Listener = Partial<FullListener>;
+
+/**
+ * An object with methods for handling the responses to a call.
+ */
+export interface InterceptingListener {
+  onReceiveMetadata(metadata: Metadata): void;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  onReceiveMessage(message: any): void;
+  onReceiveStatus(status: StatusObject): void;
+}
+
+export function isInterceptingListener(
+  listener: Listener | InterceptingListener
+): listener is InterceptingListener {
+  return (
+    listener.onReceiveMetadata !== undefined &&
+    listener.onReceiveMetadata.length === 1
+  );
+}
+
+export class InterceptingListenerImpl implements InterceptingListener {
+  private processingMetadata = false;
+  private hasPendingMessage = false;
+  private pendingMessage: any;
+  private processingMessage = false;
+  private pendingStatus: StatusObject | null = null;
+  constructor(
+    private listener: FullListener,
+    private nextListener: InterceptingListener
+  ) {}
+
+  private processPendingMessage() {
+    if (this.hasPendingMessage) {
+      this.nextListener.onReceiveMessage(this.pendingMessage);
+      this.pendingMessage = null;
+      this.hasPendingMessage = false;
+    }
+  }
+
+  private processPendingStatus() {
+    if (this.pendingStatus) {
+      this.nextListener.onReceiveStatus(this.pendingStatus);
+    }
+  }
+
+  onReceiveMetadata(metadata: Metadata): void {
+    this.processingMetadata = true;
+    this.listener.onReceiveMetadata(metadata, metadata => {
+      this.processingMetadata = false;
+      this.nextListener.onReceiveMetadata(metadata);
+      this.processPendingMessage();
+      this.processPendingStatus();
+    });
+  }
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  onReceiveMessage(message: any): void {
+    /* If this listener processes messages asynchronously, the last message may
+     * be reordered with respect to the status */
+    this.processingMessage = true;
+    this.listener.onReceiveMessage(message, msg => {
+      this.processingMessage = false;
+      if (this.processingMetadata) {
+        this.pendingMessage = msg;
+        this.hasPendingMessage = true;
+      } else {
+        this.nextListener.onReceiveMessage(msg);
+        this.processPendingStatus();
+      }
+    });
+  }
+  onReceiveStatus(status: StatusObject): void {
+    this.listener.onReceiveStatus(status, processedStatus => {
+      if (this.processingMetadata || this.processingMessage) {
+        this.pendingStatus = processedStatus;
+      } else {
+        this.nextListener.onReceiveStatus(processedStatus);
+      }
+    });
+  }
+}
+
+export interface WriteCallback {
+  (error?: Error | null): void;
+}
+
+export interface MessageContext {
+  callback?: WriteCallback;
+  flags?: number;
+}
+
+export interface Call {
+  cancelWithStatus(status: Status, details: string): void;
+  getPeer(): string;
+  start(metadata: Metadata, listener: InterceptingListener): void;
+  sendMessageWithContext(context: MessageContext, message: Buffer): void;
+  startRead(): void;
+  halfClose(): void;
+  getCallNumber(): number;
+  setCredentials(credentials: CallCredentials): void;
+}

travel-backend/node_modules/@grpc/grpc-js/src/call-number.ts

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2022 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.
+ *
+ */
+
+let nextCallNumber = 0;
+
+export function getNextCallNumber() {
+  return nextCallNumber++;
+}

travel-backend/node_modules/@grpc/grpc-js/src/call.ts

@@ -0,0 +1,200 @@
+/*
+ * 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.
+ *
+ */
+
+import { EventEmitter } from 'events';
+import { Duplex, Readable, Writable } from 'stream';
+
+import { StatusObject, MessageContext } from './call-interface';
+import { Status } from './constants';
+import { EmitterAugmentation1 } from './events';
+import { Metadata } from './metadata';
+import { ObjectReadable, ObjectWritable, WriteCallback } from './object-stream';
+import { InterceptingCallInterface } from './client-interceptors';
+
+/**
+ * A type extending the built-in Error object with additional fields.
+ */
+export type ServiceError = StatusObject & Error;
+
+/**
+ * A base type for all user-facing values returned by client-side method calls.
+ */
+export type SurfaceCall = {
+  call?: InterceptingCallInterface;
+  cancel(): void;
+  getPeer(): string;
+} & EmitterAugmentation1<'metadata', Metadata> &
+  EmitterAugmentation1<'status', StatusObject> &
+  EventEmitter;
+
+/**
+ * A type representing the return value of a unary method call.
+ */
+export type ClientUnaryCall = SurfaceCall;
+
+/**
+ * A type representing the return value of a server stream method call.
+ */
+export type ClientReadableStream<ResponseType> = {
+  deserialize: (chunk: Buffer) => ResponseType;
+} & SurfaceCall &
+  ObjectReadable<ResponseType>;
+
+/**
+ * A type representing the return value of a client stream method call.
+ */
+export type ClientWritableStream<RequestType> = {
+  serialize: (value: RequestType) => Buffer;
+} & SurfaceCall &
+  ObjectWritable<RequestType>;
+
+/**
+ * A type representing the return value of a bidirectional stream method call.
+ */
+export 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 function callErrorFromStatus(
+  status: StatusObject,
+  callerStack: string
+): ServiceError {
+  const message = `${status.code} ${Status[status.code]}: ${status.details}`;
+  const error = new Error(message);
+  const stack = `${error.stack}\nfor call at\n${callerStack}`;
+  return Object.assign(new Error(message), status, { stack });
+}
+
+export class ClientUnaryCallImpl
+  extends EventEmitter
+  implements ClientUnaryCall
+{
+  public call?: InterceptingCallInterface;
+  constructor() {
+    super();
+  }
+
+  cancel(): void {
+    this.call?.cancelWithStatus(Status.CANCELLED, 'Cancelled on client');
+  }
+
+  getPeer(): string {
+    return this.call?.getPeer() ?? 'unknown';
+  }
+}
+
+export class ClientReadableStreamImpl<ResponseType>
+  extends Readable
+  implements ClientReadableStream<ResponseType>
+{
+  public call?: InterceptingCallInterface;
+  constructor(readonly deserialize: (chunk: Buffer) => ResponseType) {
+    super({ objectMode: true });
+  }
+
+  cancel(): void {
+    this.call?.cancelWithStatus(Status.CANCELLED, 'Cancelled on client');
+  }
+
+  getPeer(): string {
+    return this.call?.getPeer() ?? 'unknown';
+  }
+
+  _read(_size: number): void {
+    this.call?.startRead();
+  }
+}
+
+export class ClientWritableStreamImpl<RequestType>
+  extends Writable
+  implements ClientWritableStream<RequestType>
+{
+  public call?: InterceptingCallInterface;
+  constructor(readonly serialize: (value: RequestType) => Buffer) {
+    super({ objectMode: true });
+  }
+
+  cancel(): void {
+    this.call?.cancelWithStatus(Status.CANCELLED, 'Cancelled on client');
+  }
+
+  getPeer(): string {
+    return this.call?.getPeer() ?? 'unknown';
+  }
+
+  _write(chunk: RequestType, encoding: string, cb: WriteCallback) {
+    const context: MessageContext = {
+      callback: cb,
+    };
+    const flags = Number(encoding);
+    if (!Number.isNaN(flags)) {
+      context.flags = flags;
+    }
+    this.call?.sendMessageWithContext(context, chunk);
+  }
+
+  _final(cb: Function) {
+    this.call?.halfClose();
+    cb();
+  }
+}
+
+export class ClientDuplexStreamImpl<RequestType, ResponseType>
+  extends Duplex
+  implements ClientDuplexStream<RequestType, ResponseType>
+{
+  public call?: InterceptingCallInterface;
+  constructor(
+    readonly serialize: (value: RequestType) => Buffer,
+    readonly deserialize: (chunk: Buffer) => ResponseType
+  ) {
+    super({ objectMode: true });
+  }
+
+  cancel(): void {
+    this.call?.cancelWithStatus(Status.CANCELLED, 'Cancelled on client');
+  }
+
+  getPeer(): string {
+    return this.call?.getPeer() ?? 'unknown';
+  }
+
+  _read(_size: number): void {
+    this.call?.startRead();
+  }
+
+  _write(chunk: RequestType, encoding: string, cb: WriteCallback) {
+    const context: MessageContext = {
+      callback: cb,
+    };
+    const flags = Number(encoding);
+    if (!Number.isNaN(flags)) {
+      context.flags = flags;
+    }
+    this.call?.sendMessageWithContext(context, chunk);
+  }
+
+  _final(cb: Function) {
+    this.call?.halfClose();
+    cb();
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/channel-credentials.ts

@@ -0,0 +1,267 @@
+/*
+ * 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.
+ *
+ */
+
+import {
+  ConnectionOptions,
+  createSecureContext,
+  PeerCertificate,
+  SecureContext,
+} from 'tls';
+
+import { CallCredentials } from './call-credentials';
+import { CIPHER_SUITES, getDefaultRootsData } from './tls-helpers';
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function verifyIsBufferOrNull(obj: any, friendlyName: string): void {
+  if (obj && !(obj instanceof Buffer)) {
+    throw new TypeError(`${friendlyName}, if provided, must be a 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 type CheckServerIdentityCallback = (
+  hostname: string,
+  cert: PeerCertificate
+) => 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 abstract class ChannelCredentials {
+  protected callCredentials: CallCredentials;
+
+  protected constructor(callCredentials?: CallCredentials) {
+    this.callCredentials = callCredentials || CallCredentials.createEmpty();
+  }
+  /**
+   * 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 {
+    return this.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.
+   * @param verifyOptions Additional options to modify certificate verification
+   */
+  static createSsl(
+    rootCerts?: Buffer | null,
+    privateKey?: Buffer | null,
+    certChain?: Buffer | null,
+    verifyOptions?: VerifyOptions
+  ): ChannelCredentials {
+    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'
+      );
+    }
+    const secureContext = createSecureContext({
+      ca: rootCerts ?? getDefaultRootsData() ?? undefined,
+      key: privateKey ?? undefined,
+      cert: certChain ?? undefined,
+      ciphers: CIPHER_SUITES,
+    });
+    return new SecureChannelCredentialsImpl(secureContext, verifyOptions ?? {});
+  }
+
+  /**
+   * Return a new ChannelCredentials instance with credentials created using
+   * the provided secureContext. The resulting instances can be used to
+   * construct a Channel that communicates over TLS. gRPC will not override
+   * anything in the provided secureContext, so the environment variables
+   * GRPC_SSL_CIPHER_SUITES and GRPC_DEFAULT_SSL_ROOTS_FILE_PATH will
+   * not be applied.
+   * @param secureContext The return value of tls.createSecureContext()
+   * @param verifyOptions Additional options to modify certificate verification
+   */
+  static createFromSecureContext(
+    secureContext: SecureContext,
+    verifyOptions?: VerifyOptions
+  ): ChannelCredentials {
+    return new SecureChannelCredentialsImpl(secureContext, verifyOptions ?? {});
+  }
+
+  /**
+   * Return a new ChannelCredentials instance with no credentials.
+   */
+  static createInsecure(): ChannelCredentials {
+    return new InsecureChannelCredentialsImpl();
+  }
+}
+
+class InsecureChannelCredentialsImpl extends ChannelCredentials {
+  constructor(callCredentials?: CallCredentials) {
+    super(callCredentials);
+  }
+
+  compose(callCredentials: CallCredentials): never {
+    throw new Error('Cannot compose insecure credentials');
+  }
+
+  _getConnectionOptions(): ConnectionOptions | null {
+    return null;
+  }
+  _isSecure(): boolean {
+    return false;
+  }
+  _equals(other: ChannelCredentials): boolean {
+    return other instanceof InsecureChannelCredentialsImpl;
+  }
+}
+
+class SecureChannelCredentialsImpl extends ChannelCredentials {
+  connectionOptions: ConnectionOptions;
+
+  constructor(
+    private secureContext: SecureContext,
+    private verifyOptions: VerifyOptions
+  ) {
+    super();
+    this.connectionOptions = {
+      secureContext,
+    };
+    // Node asserts that this option is a function, so we cannot pass undefined
+    if (verifyOptions?.checkServerIdentity) {
+      this.connectionOptions.checkServerIdentity =
+        verifyOptions.checkServerIdentity;
+    }
+  }
+
+  compose(callCredentials: CallCredentials): ChannelCredentials {
+    const combinedCallCredentials =
+      this.callCredentials.compose(callCredentials);
+    return new ComposedChannelCredentialsImpl(this, combinedCallCredentials);
+  }
+
+  _getConnectionOptions(): ConnectionOptions | null {
+    // Copy to prevent callers from mutating this.connectionOptions
+    return { ...this.connectionOptions };
+  }
+  _isSecure(): boolean {
+    return true;
+  }
+  _equals(other: ChannelCredentials): boolean {
+    if (this === other) {
+      return true;
+    }
+    if (other instanceof SecureChannelCredentialsImpl) {
+      return (
+        this.secureContext === other.secureContext &&
+        this.verifyOptions.checkServerIdentity ===
+          other.verifyOptions.checkServerIdentity
+      );
+    } else {
+      return false;
+    }
+  }
+}
+
+class ComposedChannelCredentialsImpl extends ChannelCredentials {
+  constructor(
+    private channelCredentials: SecureChannelCredentialsImpl,
+    callCreds: CallCredentials
+  ) {
+    super(callCreds);
+  }
+  compose(callCredentials: CallCredentials) {
+    const combinedCallCredentials =
+      this.callCredentials.compose(callCredentials);
+    return new ComposedChannelCredentialsImpl(
+      this.channelCredentials,
+      combinedCallCredentials
+    );
+  }
+
+  _getConnectionOptions(): ConnectionOptions | null {
+    return this.channelCredentials._getConnectionOptions();
+  }
+  _isSecure(): boolean {
+    return true;
+  }
+  _equals(other: ChannelCredentials): boolean {
+    if (this === other) {
+      return true;
+    }
+    if (other instanceof ComposedChannelCredentialsImpl) {
+      return (
+        this.channelCredentials._equals(other.channelCredentials) &&
+        this.callCredentials._equals(other.callCredentials)
+      );
+    } else {
+      return false;
+    }
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/channel-options.ts

@@ -0,0 +1,119 @@
+/*
+ * 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.
+ *
+ */
+
+import { CompressionAlgorithms } from './compression-algorithms';
+
+/**
+ * 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.keepalive_permit_without_calls'?: 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;
+  'grpc.max_send_message_length'?: number;
+  'grpc.max_receive_message_length'?: number;
+  'grpc.enable_http_proxy'?: number;
+  /* http_connect_target and http_connect_creds are used for passing data
+   * around internally, and should not be documented as public-facing options
+   */
+  'grpc.http_connect_target'?: string;
+  'grpc.http_connect_creds'?: string;
+  'grpc.default_compression_algorithm'?: CompressionAlgorithms;
+  'grpc.enable_channelz'?: number;
+  'grpc.dns_min_time_between_resolutions_ms'?: number;
+  'grpc.enable_retries'?: number;
+  'grpc.per_rpc_retry_buffer_size'?: number;
+  /* This option is pattered like a core option, but the core does not have
+   * this option. It is closely related to the option
+   * grpc.per_rpc_retry_buffer_size, which is in the core. The core will likely
+   * implement this functionality using the ResourceQuota mechanism, so there
+   * will probably not be any collision or other inconsistency. */
+  'grpc.retry_buffer_size'?: number;
+  'grpc.max_connection_age_ms'?: number;
+  'grpc.max_connection_age_grace_ms'?: number;
+  'grpc-node.max_session_memory'?: number;
+  'grpc.service_config_disable_resolution'?: number;
+  'grpc.client_idle_timeout_ms'?: number;
+  /**
+   * Set the enableTrace option in TLS clients and servers
+   */
+  'grpc-node.tls_enable_trace'?: number;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  [key: string]: any;
+}
+
+/**
+ * This is for checking provided options at runtime. This is an object for
+ * easier membership checking.
+ */
+export const 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.keepalive_permit_without_calls': 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,
+  'grpc.max_send_message_length': true,
+  'grpc.max_receive_message_length': true,
+  'grpc.enable_http_proxy': true,
+  'grpc.enable_channelz': true,
+  'grpc.dns_min_time_between_resolutions_ms': true,
+  'grpc.enable_retries': true,
+  'grpc.per_rpc_retry_buffer_size': true,
+  'grpc.retry_buffer_size': true,
+  'grpc.max_connection_age_ms': true,
+  'grpc.max_connection_age_grace_ms': true,
+  'grpc-node.max_session_memory': true,
+  'grpc.service_config_disable_resolution': true,
+  'grpc.client_idle_timeout_ms': true,
+  'grpc-node.tls_enable_trace': true,
+};
+
+export function channelOptionsEqual(
+  options1: ChannelOptions,
+  options2: ChannelOptions
+) {
+  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;
+}

travel-backend/node_modules/@grpc/grpc-js/src/channel.ts

@@ -0,0 +1,174 @@
+/*
+ * 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.
+ *
+ */
+
+import { ChannelCredentials } from './channel-credentials';
+import { ChannelOptions } from './channel-options';
+import { ServerSurfaceCall } from './server-call';
+
+import { ConnectivityState } from './connectivity-state';
+import { ChannelRef } from './channelz';
+import { Call } from './call-interface';
+import { InternalChannel } from './internal-channel';
+import { Deadline } from './deadline';
+
+/**
+ * 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;
+  /**
+   * Get the channelz reference object for this channel. A request to the
+   * channelz service for the id in this object will provide information
+   * about this channel.
+   */
+  getChannelzRef(): ChannelRef;
+  /**
+   * 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,
+    host: string | null | undefined,
+    parentCall: ServerSurfaceCall | null,
+    propagateFlags: number | null | undefined
+  ): Call;
+}
+
+export class ChannelImplementation implements Channel {
+  private internalChannel: InternalChannel;
+
+  constructor(
+    target: string,
+    credentials: ChannelCredentials,
+    options: ChannelOptions
+  ) {
+    if (typeof target !== 'string') {
+      throw new TypeError('Channel target must be a string');
+    }
+    if (!(credentials instanceof ChannelCredentials)) {
+      throw new TypeError(
+        'Channel credentials must be a ChannelCredentials object'
+      );
+    }
+    if (options) {
+      if (typeof options !== 'object') {
+        throw new TypeError('Channel options must be an object');
+      }
+    }
+
+    this.internalChannel = new InternalChannel(target, credentials, options);
+  }
+
+  close() {
+    this.internalChannel.close();
+  }
+
+  getTarget() {
+    return this.internalChannel.getTarget();
+  }
+
+  getConnectivityState(tryToConnect: boolean) {
+    return this.internalChannel.getConnectivityState(tryToConnect);
+  }
+
+  watchConnectivityState(
+    currentState: ConnectivityState,
+    deadline: Date | number,
+    callback: (error?: Error) => void
+  ): void {
+    this.internalChannel.watchConnectivityState(
+      currentState,
+      deadline,
+      callback
+    );
+  }
+
+  /**
+   * Get the channelz reference object for this channel. The returned value is
+   * garbage if channelz is disabled for this channel.
+   * @returns
+   */
+  getChannelzRef() {
+    return this.internalChannel.getChannelzRef();
+  }
+
+  createCall(
+    method: string,
+    deadline: Deadline,
+    host: string | null | undefined,
+    parentCall: ServerSurfaceCall | null,
+    propagateFlags: number | null | undefined
+  ): Call {
+    if (typeof method !== 'string') {
+      throw new TypeError('Channel#createCall: method must be a string');
+    }
+    if (!(typeof deadline === 'number' || deadline instanceof Date)) {
+      throw new TypeError(
+        'Channel#createCall: deadline must be a number or Date'
+      );
+    }
+    return this.internalChannel.createCall(
+      method,
+      deadline,
+      host,
+      parentCall,
+      propagateFlags
+    );
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/channelz.ts

@@ -0,0 +1,886 @@
+/*
+ * Copyright 2021 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.
+ *
+ */
+
+import { isIPv4, isIPv6 } from 'net';
+import { ConnectivityState } from './connectivity-state';
+import { Status } from './constants';
+import { Timestamp } from './generated/google/protobuf/Timestamp';
+import { Channel as ChannelMessage } from './generated/grpc/channelz/v1/Channel';
+import { ChannelConnectivityState__Output } from './generated/grpc/channelz/v1/ChannelConnectivityState';
+import { ChannelRef as ChannelRefMessage } from './generated/grpc/channelz/v1/ChannelRef';
+import { ChannelTrace } from './generated/grpc/channelz/v1/ChannelTrace';
+import { GetChannelRequest__Output } from './generated/grpc/channelz/v1/GetChannelRequest';
+import { GetChannelResponse } from './generated/grpc/channelz/v1/GetChannelResponse';
+import { sendUnaryData, ServerUnaryCall } from './server-call';
+import { ServerRef as ServerRefMessage } from './generated/grpc/channelz/v1/ServerRef';
+import { SocketRef as SocketRefMessage } from './generated/grpc/channelz/v1/SocketRef';
+import {
+  isTcpSubchannelAddress,
+  SubchannelAddress,
+} from './subchannel-address';
+import { SubchannelRef as SubchannelRefMessage } from './generated/grpc/channelz/v1/SubchannelRef';
+import { GetServerRequest__Output } from './generated/grpc/channelz/v1/GetServerRequest';
+import { GetServerResponse } from './generated/grpc/channelz/v1/GetServerResponse';
+import { Server as ServerMessage } from './generated/grpc/channelz/v1/Server';
+import { GetServersRequest__Output } from './generated/grpc/channelz/v1/GetServersRequest';
+import { GetServersResponse } from './generated/grpc/channelz/v1/GetServersResponse';
+import { GetTopChannelsRequest__Output } from './generated/grpc/channelz/v1/GetTopChannelsRequest';
+import { GetTopChannelsResponse } from './generated/grpc/channelz/v1/GetTopChannelsResponse';
+import { GetSubchannelRequest__Output } from './generated/grpc/channelz/v1/GetSubchannelRequest';
+import { GetSubchannelResponse } from './generated/grpc/channelz/v1/GetSubchannelResponse';
+import { Subchannel as SubchannelMessage } from './generated/grpc/channelz/v1/Subchannel';
+import { GetSocketRequest__Output } from './generated/grpc/channelz/v1/GetSocketRequest';
+import { GetSocketResponse } from './generated/grpc/channelz/v1/GetSocketResponse';
+import { Socket as SocketMessage } from './generated/grpc/channelz/v1/Socket';
+import { Address } from './generated/grpc/channelz/v1/Address';
+import { Security } from './generated/grpc/channelz/v1/Security';
+import { GetServerSocketsRequest__Output } from './generated/grpc/channelz/v1/GetServerSocketsRequest';
+import { GetServerSocketsResponse } from './generated/grpc/channelz/v1/GetServerSocketsResponse';
+import {
+  ChannelzDefinition,
+  ChannelzHandlers,
+} from './generated/grpc/channelz/v1/Channelz';
+import { ProtoGrpcType as ChannelzProtoGrpcType } from './generated/channelz';
+import type { loadSync } from '@grpc/proto-loader';
+import { registerAdminService } from './admin';
+import { loadPackageDefinition } from './make-client';
+
+export type TraceSeverity =
+  | 'CT_UNKNOWN'
+  | 'CT_INFO'
+  | 'CT_WARNING'
+  | 'CT_ERROR';
+
+export interface ChannelRef {
+  kind: 'channel';
+  id: number;
+  name: string;
+}
+
+export interface SubchannelRef {
+  kind: 'subchannel';
+  id: number;
+  name: string;
+}
+
+export interface ServerRef {
+  kind: 'server';
+  id: number;
+}
+
+export interface SocketRef {
+  kind: 'socket';
+  id: number;
+  name: string;
+}
+
+function channelRefToMessage(ref: ChannelRef): ChannelRefMessage {
+  return {
+    channel_id: ref.id,
+    name: ref.name,
+  };
+}
+
+function subchannelRefToMessage(ref: SubchannelRef): SubchannelRefMessage {
+  return {
+    subchannel_id: ref.id,
+    name: ref.name,
+  };
+}
+
+function serverRefToMessage(ref: ServerRef): ServerRefMessage {
+  return {
+    server_id: ref.id,
+  };
+}
+
+function socketRefToMessage(ref: SocketRef): SocketRefMessage {
+  return {
+    socket_id: ref.id,
+    name: ref.name,
+  };
+}
+
+interface TraceEvent {
+  description: string;
+  severity: TraceSeverity;
+  timestamp: Date;
+  childChannel?: ChannelRef;
+  childSubchannel?: SubchannelRef;
+}
+
+/**
+ * The loose upper bound on the number of events that should be retained in a
+ * trace. This may be exceeded by up to a factor of 2. Arbitrarily chosen as a
+ * number that should be large enough to contain the recent relevant
+ * information, but small enough to not use excessive memory.
+ */
+const TARGET_RETAINED_TRACES = 32;
+
+export class ChannelzTrace {
+  events: TraceEvent[] = [];
+  creationTimestamp: Date;
+  eventsLogged = 0;
+
+  constructor() {
+    this.creationTimestamp = new Date();
+  }
+
+  addTrace(
+    severity: TraceSeverity,
+    description: string,
+    child?: ChannelRef | SubchannelRef
+  ) {
+    const timestamp = new Date();
+    this.events.push({
+      description: description,
+      severity: severity,
+      timestamp: timestamp,
+      childChannel: child?.kind === 'channel' ? child : undefined,
+      childSubchannel: child?.kind === 'subchannel' ? child : undefined,
+    });
+    // Whenever the trace array gets too large, discard the first half
+    if (this.events.length >= TARGET_RETAINED_TRACES * 2) {
+      this.events = this.events.slice(TARGET_RETAINED_TRACES);
+    }
+    this.eventsLogged += 1;
+  }
+
+  getTraceMessage(): ChannelTrace {
+    return {
+      creation_timestamp: dateToProtoTimestamp(this.creationTimestamp),
+      num_events_logged: this.eventsLogged,
+      events: this.events.map(event => {
+        return {
+          description: event.description,
+          severity: event.severity,
+          timestamp: dateToProtoTimestamp(event.timestamp),
+          channel_ref: event.childChannel
+            ? channelRefToMessage(event.childChannel)
+            : null,
+          subchannel_ref: event.childSubchannel
+            ? subchannelRefToMessage(event.childSubchannel)
+            : null,
+        };
+      }),
+    };
+  }
+}
+
+export class ChannelzChildrenTracker {
+  private channelChildren: Map<number, { ref: ChannelRef; count: number }> =
+    new Map<number, { ref: ChannelRef; count: number }>();
+  private subchannelChildren: Map<
+    number,
+    { ref: SubchannelRef; count: number }
+  > = new Map<number, { ref: SubchannelRef; count: number }>();
+  private socketChildren: Map<number, { ref: SocketRef; count: number }> =
+    new Map<number, { ref: SocketRef; count: number }>();
+
+  refChild(child: ChannelRef | SubchannelRef | SocketRef) {
+    switch (child.kind) {
+      case 'channel': {
+        const trackedChild = this.channelChildren.get(child.id) ?? {
+          ref: child,
+          count: 0,
+        };
+        trackedChild.count += 1;
+        this.channelChildren.set(child.id, trackedChild);
+        break;
+      }
+      case 'subchannel': {
+        const trackedChild = this.subchannelChildren.get(child.id) ?? {
+          ref: child,
+          count: 0,
+        };
+        trackedChild.count += 1;
+        this.subchannelChildren.set(child.id, trackedChild);
+        break;
+      }
+      case 'socket': {
+        const trackedChild = this.socketChildren.get(child.id) ?? {
+          ref: child,
+          count: 0,
+        };
+        trackedChild.count += 1;
+        this.socketChildren.set(child.id, trackedChild);
+        break;
+      }
+    }
+  }
+
+  unrefChild(child: ChannelRef | SubchannelRef | SocketRef) {
+    switch (child.kind) {
+      case 'channel': {
+        const trackedChild = this.channelChildren.get(child.id);
+        if (trackedChild !== undefined) {
+          trackedChild.count -= 1;
+          if (trackedChild.count === 0) {
+            this.channelChildren.delete(child.id);
+          } else {
+            this.channelChildren.set(child.id, trackedChild);
+          }
+        }
+        break;
+      }
+      case 'subchannel': {
+        const trackedChild = this.subchannelChildren.get(child.id);
+        if (trackedChild !== undefined) {
+          trackedChild.count -= 1;
+          if (trackedChild.count === 0) {
+            this.subchannelChildren.delete(child.id);
+          } else {
+            this.subchannelChildren.set(child.id, trackedChild);
+          }
+        }
+        break;
+      }
+      case 'socket': {
+        const trackedChild = this.socketChildren.get(child.id);
+        if (trackedChild !== undefined) {
+          trackedChild.count -= 1;
+          if (trackedChild.count === 0) {
+            this.socketChildren.delete(child.id);
+          } else {
+            this.socketChildren.set(child.id, trackedChild);
+          }
+        }
+        break;
+      }
+    }
+  }
+
+  getChildLists(): ChannelzChildren {
+    const channels: ChannelRef[] = [];
+    for (const { ref } of this.channelChildren.values()) {
+      channels.push(ref);
+    }
+    const subchannels: SubchannelRef[] = [];
+    for (const { ref } of this.subchannelChildren.values()) {
+      subchannels.push(ref);
+    }
+    const sockets: SocketRef[] = [];
+    for (const { ref } of this.socketChildren.values()) {
+      sockets.push(ref);
+    }
+    return { channels, subchannels, sockets };
+  }
+}
+
+export class ChannelzCallTracker {
+  callsStarted = 0;
+  callsSucceeded = 0;
+  callsFailed = 0;
+  lastCallStartedTimestamp: Date | null = null;
+
+  addCallStarted() {
+    this.callsStarted += 1;
+    this.lastCallStartedTimestamp = new Date();
+  }
+  addCallSucceeded() {
+    this.callsSucceeded += 1;
+  }
+  addCallFailed() {
+    this.callsFailed += 1;
+  }
+}
+
+export interface ChannelzChildren {
+  channels: ChannelRef[];
+  subchannels: SubchannelRef[];
+  sockets: SocketRef[];
+}
+
+export interface ChannelInfo {
+  target: string;
+  state: ConnectivityState;
+  trace: ChannelzTrace;
+  callTracker: ChannelzCallTracker;
+  children: ChannelzChildren;
+}
+
+export type SubchannelInfo = ChannelInfo;
+
+export interface ServerInfo {
+  trace: ChannelzTrace;
+  callTracker: ChannelzCallTracker;
+  listenerChildren: ChannelzChildren;
+  sessionChildren: ChannelzChildren;
+}
+
+export interface TlsInfo {
+  cipherSuiteStandardName: string | null;
+  cipherSuiteOtherName: string | null;
+  localCertificate: Buffer | null;
+  remoteCertificate: Buffer | null;
+}
+
+export interface SocketInfo {
+  localAddress: SubchannelAddress | null;
+  remoteAddress: SubchannelAddress | null;
+  security: TlsInfo | null;
+  remoteName: string | null;
+  streamsStarted: number;
+  streamsSucceeded: number;
+  streamsFailed: number;
+  messagesSent: number;
+  messagesReceived: number;
+  keepAlivesSent: number;
+  lastLocalStreamCreatedTimestamp: Date | null;
+  lastRemoteStreamCreatedTimestamp: Date | null;
+  lastMessageSentTimestamp: Date | null;
+  lastMessageReceivedTimestamp: Date | null;
+  localFlowControlWindow: number | null;
+  remoteFlowControlWindow: number | null;
+}
+
+interface ChannelEntry {
+  ref: ChannelRef;
+  getInfo(): ChannelInfo;
+}
+
+interface SubchannelEntry {
+  ref: SubchannelRef;
+  getInfo(): SubchannelInfo;
+}
+
+interface ServerEntry {
+  ref: ServerRef;
+  getInfo(): ServerInfo;
+}
+
+interface SocketEntry {
+  ref: SocketRef;
+  getInfo(): SocketInfo;
+}
+
+let nextId = 1;
+
+function getNextId(): number {
+  return nextId++;
+}
+
+const channels: (ChannelEntry | undefined)[] = [];
+const subchannels: (SubchannelEntry | undefined)[] = [];
+const servers: (ServerEntry | undefined)[] = [];
+const sockets: (SocketEntry | undefined)[] = [];
+
+export function registerChannelzChannel(
+  name: string,
+  getInfo: () => ChannelInfo,
+  channelzEnabled: boolean
+): ChannelRef {
+  const id = getNextId();
+  const ref: ChannelRef = { id, name, kind: 'channel' };
+  if (channelzEnabled) {
+    channels[id] = { ref, getInfo };
+  }
+  return ref;
+}
+
+export function registerChannelzSubchannel(
+  name: string,
+  getInfo: () => SubchannelInfo,
+  channelzEnabled: boolean
+): SubchannelRef {
+  const id = getNextId();
+  const ref: SubchannelRef = { id, name, kind: 'subchannel' };
+  if (channelzEnabled) {
+    subchannels[id] = { ref, getInfo };
+  }
+  return ref;
+}
+
+export function registerChannelzServer(
+  getInfo: () => ServerInfo,
+  channelzEnabled: boolean
+): ServerRef {
+  const id = getNextId();
+  const ref: ServerRef = { id, kind: 'server' };
+  if (channelzEnabled) {
+    servers[id] = { ref, getInfo };
+  }
+  return ref;
+}
+
+export function registerChannelzSocket(
+  name: string,
+  getInfo: () => SocketInfo,
+  channelzEnabled: boolean
+): SocketRef {
+  const id = getNextId();
+  const ref: SocketRef = { id, name, kind: 'socket' };
+  if (channelzEnabled) {
+    sockets[id] = { ref, getInfo };
+  }
+  return ref;
+}
+
+export function unregisterChannelzRef(
+  ref: ChannelRef | SubchannelRef | ServerRef | SocketRef
+) {
+  switch (ref.kind) {
+    case 'channel':
+      delete channels[ref.id];
+      return;
+    case 'subchannel':
+      delete subchannels[ref.id];
+      return;
+    case 'server':
+      delete servers[ref.id];
+      return;
+    case 'socket':
+      delete sockets[ref.id];
+      return;
+  }
+}
+
+/**
+ * Parse a single section of an IPv6 address as two bytes
+ * @param addressSection A hexadecimal string of length up to 4
+ * @returns The pair of bytes representing this address section
+ */
+function parseIPv6Section(addressSection: string): [number, number] {
+  const numberValue = Number.parseInt(addressSection, 16);
+  return [(numberValue / 256) | 0, numberValue % 256];
+}
+
+/**
+ * Parse a chunk of an IPv6 address string to some number of bytes
+ * @param addressChunk Some number of segments of up to 4 hexadecimal
+ *   characters each, joined by colons.
+ * @returns The list of bytes representing this address chunk
+ */
+function parseIPv6Chunk(addressChunk: string): number[] {
+  if (addressChunk === '') {
+    return [];
+  }
+  const bytePairs = addressChunk
+    .split(':')
+    .map(section => parseIPv6Section(section));
+  const result: number[] = [];
+  return result.concat(...bytePairs);
+}
+
+/**
+ * Converts an IPv4 or IPv6 address from string representation to binary
+ * representation
+ * @param ipAddress an IP address in standard IPv4 or IPv6 text format
+ * @returns
+ */
+function ipAddressStringToBuffer(ipAddress: string): Buffer | null {
+  if (isIPv4(ipAddress)) {
+    return Buffer.from(
+      Uint8Array.from(
+        ipAddress.split('.').map(segment => Number.parseInt(segment))
+      )
+    );
+  } else if (isIPv6(ipAddress)) {
+    let leftSection: string;
+    let rightSection: string;
+    const doubleColonIndex = ipAddress.indexOf('::');
+    if (doubleColonIndex === -1) {
+      leftSection = ipAddress;
+      rightSection = '';
+    } else {
+      leftSection = ipAddress.substring(0, doubleColonIndex);
+      rightSection = ipAddress.substring(doubleColonIndex + 2);
+    }
+    const leftBuffer = Buffer.from(parseIPv6Chunk(leftSection));
+    const rightBuffer = Buffer.from(parseIPv6Chunk(rightSection));
+    const middleBuffer = Buffer.alloc(
+      16 - leftBuffer.length - rightBuffer.length,
+      0
+    );
+    return Buffer.concat([leftBuffer, middleBuffer, rightBuffer]);
+  } else {
+    return null;
+  }
+}
+
+function connectivityStateToMessage(
+  state: ConnectivityState
+): ChannelConnectivityState__Output {
+  switch (state) {
+    case ConnectivityState.CONNECTING:
+      return {
+        state: 'CONNECTING',
+      };
+    case ConnectivityState.IDLE:
+      return {
+        state: 'IDLE',
+      };
+    case ConnectivityState.READY:
+      return {
+        state: 'READY',
+      };
+    case ConnectivityState.SHUTDOWN:
+      return {
+        state: 'SHUTDOWN',
+      };
+    case ConnectivityState.TRANSIENT_FAILURE:
+      return {
+        state: 'TRANSIENT_FAILURE',
+      };
+    default:
+      return {
+        state: 'UNKNOWN',
+      };
+  }
+}
+
+function dateToProtoTimestamp(date?: Date | null): Timestamp | null {
+  if (!date) {
+    return null;
+  }
+  const millisSinceEpoch = date.getTime();
+  return {
+    seconds: (millisSinceEpoch / 1000) | 0,
+    nanos: (millisSinceEpoch % 1000) * 1_000_000,
+  };
+}
+
+function getChannelMessage(channelEntry: ChannelEntry): ChannelMessage {
+  const resolvedInfo = channelEntry.getInfo();
+  return {
+    ref: channelRefToMessage(channelEntry.ref),
+    data: {
+      target: resolvedInfo.target,
+      state: connectivityStateToMessage(resolvedInfo.state),
+      calls_started: resolvedInfo.callTracker.callsStarted,
+      calls_succeeded: resolvedInfo.callTracker.callsSucceeded,
+      calls_failed: resolvedInfo.callTracker.callsFailed,
+      last_call_started_timestamp: dateToProtoTimestamp(
+        resolvedInfo.callTracker.lastCallStartedTimestamp
+      ),
+      trace: resolvedInfo.trace.getTraceMessage(),
+    },
+    channel_ref: resolvedInfo.children.channels.map(ref =>
+      channelRefToMessage(ref)
+    ),
+    subchannel_ref: resolvedInfo.children.subchannels.map(ref =>
+      subchannelRefToMessage(ref)
+    ),
+  };
+}
+
+function GetChannel(
+  call: ServerUnaryCall<GetChannelRequest__Output, GetChannelResponse>,
+  callback: sendUnaryData<GetChannelResponse>
+): void {
+  const channelId = Number.parseInt(call.request.channel_id);
+  const channelEntry = channels[channelId];
+  if (channelEntry === undefined) {
+    callback({
+      code: Status.NOT_FOUND,
+      details: 'No channel data found for id ' + channelId,
+    });
+    return;
+  }
+  callback(null, { channel: getChannelMessage(channelEntry) });
+}
+
+function GetTopChannels(
+  call: ServerUnaryCall<GetTopChannelsRequest__Output, GetTopChannelsResponse>,
+  callback: sendUnaryData<GetTopChannelsResponse>
+): void {
+  const maxResults = Number.parseInt(call.request.max_results);
+  const resultList: ChannelMessage[] = [];
+  let i = Number.parseInt(call.request.start_channel_id);
+  for (; i < channels.length; i++) {
+    const channelEntry = channels[i];
+    if (channelEntry === undefined) {
+      continue;
+    }
+    resultList.push(getChannelMessage(channelEntry));
+    if (resultList.length >= maxResults) {
+      break;
+    }
+  }
+  callback(null, {
+    channel: resultList,
+    end: i >= servers.length,
+  });
+}
+
+function getServerMessage(serverEntry: ServerEntry): ServerMessage {
+  const resolvedInfo = serverEntry.getInfo();
+  return {
+    ref: serverRefToMessage(serverEntry.ref),
+    data: {
+      calls_started: resolvedInfo.callTracker.callsStarted,
+      calls_succeeded: resolvedInfo.callTracker.callsSucceeded,
+      calls_failed: resolvedInfo.callTracker.callsFailed,
+      last_call_started_timestamp: dateToProtoTimestamp(
+        resolvedInfo.callTracker.lastCallStartedTimestamp
+      ),
+      trace: resolvedInfo.trace.getTraceMessage(),
+    },
+    listen_socket: resolvedInfo.listenerChildren.sockets.map(ref =>
+      socketRefToMessage(ref)
+    ),
+  };
+}
+
+function GetServer(
+  call: ServerUnaryCall<GetServerRequest__Output, GetServerResponse>,
+  callback: sendUnaryData<GetServerResponse>
+): void {
+  const serverId = Number.parseInt(call.request.server_id);
+  const serverEntry = servers[serverId];
+  if (serverEntry === undefined) {
+    callback({
+      code: Status.NOT_FOUND,
+      details: 'No server data found for id ' + serverId,
+    });
+    return;
+  }
+  callback(null, { server: getServerMessage(serverEntry) });
+}
+
+function GetServers(
+  call: ServerUnaryCall<GetServersRequest__Output, GetServersResponse>,
+  callback: sendUnaryData<GetServersResponse>
+): void {
+  const maxResults = Number.parseInt(call.request.max_results);
+  const resultList: ServerMessage[] = [];
+  let i = Number.parseInt(call.request.start_server_id);
+  for (; i < servers.length; i++) {
+    const serverEntry = servers[i];
+    if (serverEntry === undefined) {
+      continue;
+    }
+    resultList.push(getServerMessage(serverEntry));
+    if (resultList.length >= maxResults) {
+      break;
+    }
+  }
+  callback(null, {
+    server: resultList,
+    end: i >= servers.length,
+  });
+}
+
+function GetSubchannel(
+  call: ServerUnaryCall<GetSubchannelRequest__Output, GetSubchannelResponse>,
+  callback: sendUnaryData<GetSubchannelResponse>
+): void {
+  const subchannelId = Number.parseInt(call.request.subchannel_id);
+  const subchannelEntry = subchannels[subchannelId];
+  if (subchannelEntry === undefined) {
+    callback({
+      code: Status.NOT_FOUND,
+      details: 'No subchannel data found for id ' + subchannelId,
+    });
+    return;
+  }
+  const resolvedInfo = subchannelEntry.getInfo();
+  const subchannelMessage: SubchannelMessage = {
+    ref: subchannelRefToMessage(subchannelEntry.ref),
+    data: {
+      target: resolvedInfo.target,
+      state: connectivityStateToMessage(resolvedInfo.state),
+      calls_started: resolvedInfo.callTracker.callsStarted,
+      calls_succeeded: resolvedInfo.callTracker.callsSucceeded,
+      calls_failed: resolvedInfo.callTracker.callsFailed,
+      last_call_started_timestamp: dateToProtoTimestamp(
+        resolvedInfo.callTracker.lastCallStartedTimestamp
+      ),
+      trace: resolvedInfo.trace.getTraceMessage(),
+    },
+    socket_ref: resolvedInfo.children.sockets.map(ref =>
+      socketRefToMessage(ref)
+    ),
+  };
+  callback(null, { subchannel: subchannelMessage });
+}
+
+function subchannelAddressToAddressMessage(
+  subchannelAddress: SubchannelAddress
+): Address {
+  if (isTcpSubchannelAddress(subchannelAddress)) {
+    return {
+      address: 'tcpip_address',
+      tcpip_address: {
+        ip_address:
+          ipAddressStringToBuffer(subchannelAddress.host) ?? undefined,
+        port: subchannelAddress.port,
+      },
+    };
+  } else {
+    return {
+      address: 'uds_address',
+      uds_address: {
+        filename: subchannelAddress.path,
+      },
+    };
+  }
+}
+
+function GetSocket(
+  call: ServerUnaryCall<GetSocketRequest__Output, GetSocketResponse>,
+  callback: sendUnaryData<GetSocketResponse>
+): void {
+  const socketId = Number.parseInt(call.request.socket_id);
+  const socketEntry = sockets[socketId];
+  if (socketEntry === undefined) {
+    callback({
+      code: Status.NOT_FOUND,
+      details: 'No socket data found for id ' + socketId,
+    });
+    return;
+  }
+  const resolvedInfo = socketEntry.getInfo();
+  const securityMessage: Security | null = resolvedInfo.security
+    ? {
+        model: 'tls',
+        tls: {
+          cipher_suite: resolvedInfo.security.cipherSuiteStandardName
+            ? 'standard_name'
+            : 'other_name',
+          standard_name:
+            resolvedInfo.security.cipherSuiteStandardName ?? undefined,
+          other_name: resolvedInfo.security.cipherSuiteOtherName ?? undefined,
+          local_certificate:
+            resolvedInfo.security.localCertificate ?? undefined,
+          remote_certificate:
+            resolvedInfo.security.remoteCertificate ?? undefined,
+        },
+      }
+    : null;
+  const socketMessage: SocketMessage = {
+    ref: socketRefToMessage(socketEntry.ref),
+    local: resolvedInfo.localAddress
+      ? subchannelAddressToAddressMessage(resolvedInfo.localAddress)
+      : null,
+    remote: resolvedInfo.remoteAddress
+      ? subchannelAddressToAddressMessage(resolvedInfo.remoteAddress)
+      : null,
+    remote_name: resolvedInfo.remoteName ?? undefined,
+    security: securityMessage,
+    data: {
+      keep_alives_sent: resolvedInfo.keepAlivesSent,
+      streams_started: resolvedInfo.streamsStarted,
+      streams_succeeded: resolvedInfo.streamsSucceeded,
+      streams_failed: resolvedInfo.streamsFailed,
+      last_local_stream_created_timestamp: dateToProtoTimestamp(
+        resolvedInfo.lastLocalStreamCreatedTimestamp
+      ),
+      last_remote_stream_created_timestamp: dateToProtoTimestamp(
+        resolvedInfo.lastRemoteStreamCreatedTimestamp
+      ),
+      messages_received: resolvedInfo.messagesReceived,
+      messages_sent: resolvedInfo.messagesSent,
+      last_message_received_timestamp: dateToProtoTimestamp(
+        resolvedInfo.lastMessageReceivedTimestamp
+      ),
+      last_message_sent_timestamp: dateToProtoTimestamp(
+        resolvedInfo.lastMessageSentTimestamp
+      ),
+      local_flow_control_window: resolvedInfo.localFlowControlWindow
+        ? { value: resolvedInfo.localFlowControlWindow }
+        : null,
+      remote_flow_control_window: resolvedInfo.remoteFlowControlWindow
+        ? { value: resolvedInfo.remoteFlowControlWindow }
+        : null,
+    },
+  };
+  callback(null, { socket: socketMessage });
+}
+
+function GetServerSockets(
+  call: ServerUnaryCall<
+    GetServerSocketsRequest__Output,
+    GetServerSocketsResponse
+  >,
+  callback: sendUnaryData<GetServerSocketsResponse>
+): void {
+  const serverId = Number.parseInt(call.request.server_id);
+  const serverEntry = servers[serverId];
+  if (serverEntry === undefined) {
+    callback({
+      code: Status.NOT_FOUND,
+      details: 'No server data found for id ' + serverId,
+    });
+    return;
+  }
+  const startId = Number.parseInt(call.request.start_socket_id);
+  const maxResults = Number.parseInt(call.request.max_results);
+  const resolvedInfo = serverEntry.getInfo();
+  // If we wanted to include listener sockets in the result, this line would
+  // instead say
+  // const allSockets = resolvedInfo.listenerChildren.sockets.concat(resolvedInfo.sessionChildren.sockets).sort((ref1, ref2) => ref1.id - ref2.id);
+  const allSockets = resolvedInfo.sessionChildren.sockets.sort(
+    (ref1, ref2) => ref1.id - ref2.id
+  );
+  const resultList: SocketRefMessage[] = [];
+  let i = 0;
+  for (; i < allSockets.length; i++) {
+    if (allSockets[i].id >= startId) {
+      resultList.push(socketRefToMessage(allSockets[i]));
+      if (resultList.length >= maxResults) {
+        break;
+      }
+    }
+  }
+  callback(null, {
+    socket_ref: resultList,
+    end: i >= allSockets.length,
+  });
+}
+
+export function getChannelzHandlers(): ChannelzHandlers {
+  return {
+    GetChannel,
+    GetTopChannels,
+    GetServer,
+    GetServers,
+    GetSubchannel,
+    GetSocket,
+    GetServerSockets,
+  };
+}
+
+let loadedChannelzDefinition: ChannelzDefinition | null = null;
+
+export function getChannelzServiceDefinition(): ChannelzDefinition {
+  if (loadedChannelzDefinition) {
+    return loadedChannelzDefinition;
+  }
+  /* The purpose of this complexity is to avoid loading @grpc/proto-loader at
+   * runtime for users who will not use/enable channelz. */
+  const loaderLoadSync = require('@grpc/proto-loader')
+    .loadSync as typeof loadSync;
+  const loadedProto = loaderLoadSync('channelz.proto', {
+    keepCase: true,
+    longs: String,
+    enums: String,
+    defaults: true,
+    oneofs: true,
+    includeDirs: [`${__dirname}/../../proto`],
+  });
+  const channelzGrpcObject = loadPackageDefinition(
+    loadedProto
+  ) as unknown as ChannelzProtoGrpcType;
+  loadedChannelzDefinition =
+    channelzGrpcObject.grpc.channelz.v1.Channelz.service;
+  return loadedChannelzDefinition;
+}
+
+export function setup() {
+  registerAdminService(getChannelzServiceDefinition, getChannelzHandlers);
+}

travel-backend/node_modules/@grpc/grpc-js/src/client-interceptors.ts

@@ -0,0 +1,577 @@
+/*
+ * 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.
+ *
+ */
+
+import { Metadata } from './metadata';
+import {
+  StatusObject,
+  Listener,
+  MetadataListener,
+  MessageListener,
+  StatusListener,
+  FullListener,
+  InterceptingListener,
+  InterceptingListenerImpl,
+  isInterceptingListener,
+  MessageContext,
+  Call,
+} from './call-interface';
+import { Status } from './constants';
+import { Channel } from './channel';
+import { CallOptions } from './client';
+import { ClientMethodDefinition } from './make-client';
+import { getErrorMessage } from './error';
+
+/**
+ * Error class associated with passing both interceptors and interceptor
+ * providers to a client constructor or as call options.
+ */
+export class InterceptorConfigurationError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'InterceptorConfigurationError';
+    Error.captureStackTrace(this, InterceptorConfigurationError);
+  }
+}
+
+export interface MetadataRequester {
+  (
+    metadata: Metadata,
+    listener: InterceptingListener,
+    next: (
+      metadata: Metadata,
+      listener: InterceptingListener | Listener
+    ) => void
+  ): void;
+}
+
+export interface MessageRequester {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  (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 type Requester = Partial<FullRequester>;
+
+export class ListenerBuilder {
+  private metadata: MetadataListener | undefined = undefined;
+  private message: MessageListener | undefined = undefined;
+  private status: StatusListener | undefined = undefined;
+
+  withOnReceiveMetadata(onReceiveMetadata: MetadataListener): this {
+    this.metadata = onReceiveMetadata;
+    return this;
+  }
+
+  withOnReceiveMessage(onReceiveMessage: MessageListener): this {
+    this.message = onReceiveMessage;
+    return this;
+  }
+
+  withOnReceiveStatus(onReceiveStatus: StatusListener): this {
+    this.status = onReceiveStatus;
+    return this;
+  }
+
+  build(): Listener {
+    return {
+      onReceiveMetadata: this.metadata,
+      onReceiveMessage: this.message,
+      onReceiveStatus: this.status,
+    };
+  }
+}
+
+export class RequesterBuilder {
+  private start: MetadataRequester | undefined = undefined;
+  private message: MessageRequester | undefined = undefined;
+  private halfClose: CloseRequester | undefined = undefined;
+  private cancel: CancelRequester | undefined = undefined;
+
+  withStart(start: MetadataRequester): this {
+    this.start = start;
+    return this;
+  }
+
+  withSendMessage(sendMessage: MessageRequester): this {
+    this.message = sendMessage;
+    return this;
+  }
+
+  withHalfClose(halfClose: CloseRequester): this {
+    this.halfClose = halfClose;
+    return this;
+  }
+
+  withCancel(cancel: CancelRequester): this {
+    this.cancel = cancel;
+    return this;
+  }
+
+  build(): Requester {
+    return {
+      start: this.start,
+      sendMessage: this.message,
+      halfClose: this.halfClose,
+      cancel: this.cancel,
+    };
+  }
+}
+
+/**
+ * A Listener with a default pass-through implementation of each method. Used
+ * for filling out Listeners with some methods omitted.
+ */
+const defaultListener: FullListener = {
+  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: FullRequester = {
+  start: (metadata, listener, next) => {
+    next(metadata, listener);
+  },
+  sendMessage: (message, next) => {
+    next(message);
+  },
+  halfClose: next => {
+    next();
+  },
+  cancel: next => {
+    next();
+  },
+};
+
+export interface InterceptorOptions extends CallOptions {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  method_definition: ClientMethodDefinition<any, any>;
+}
+
+export interface InterceptingCallInterface {
+  cancelWithStatus(status: Status, details: string): void;
+  getPeer(): string;
+  start(metadata: Metadata, listener?: Partial<InterceptingListener>): void;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  sendMessageWithContext(context: MessageContext, message: any): void;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  sendMessage(message: any): void;
+  startRead(): void;
+  halfClose(): void;
+}
+
+export class InterceptingCall implements InterceptingCallInterface {
+  /**
+   * The requester that this InterceptingCall uses to modify outgoing operations
+   */
+  private requester: FullRequester;
+  /**
+   * Indicates that metadata has been passed to the requester's start
+   * method but it has not been passed to the corresponding next callback
+   */
+  private processingMetadata = false;
+  /**
+   * Message context for a pending message that is waiting for
+   */
+  private pendingMessageContext: MessageContext | null = null;
+  private pendingMessage: any;
+  /**
+   * Indicates that a message has been passed to the requester's sendMessage
+   * method but it has not been passed to the corresponding next callback
+   */
+  private processingMessage = false;
+  /**
+   * Indicates that a status was received but could not be propagated because
+   * a message was still being processed.
+   */
+  private pendingHalfClose = false;
+  constructor(
+    private nextCall: InterceptingCallInterface,
+    requester?: Requester
+  ) {
+    if (requester) {
+      this.requester = {
+        start: requester.start ?? defaultRequester.start,
+        sendMessage: requester.sendMessage ?? defaultRequester.sendMessage,
+        halfClose: requester.halfClose ?? defaultRequester.halfClose,
+        cancel: requester.cancel ?? defaultRequester.cancel,
+      };
+    } else {
+      this.requester = defaultRequester;
+    }
+  }
+
+  cancelWithStatus(status: Status, details: string) {
+    this.requester.cancel(() => {
+      this.nextCall.cancelWithStatus(status, details);
+    });
+  }
+
+  getPeer() {
+    return this.nextCall.getPeer();
+  }
+
+  private processPendingMessage() {
+    if (this.pendingMessageContext) {
+      this.nextCall.sendMessageWithContext(
+        this.pendingMessageContext,
+        this.pendingMessage
+      );
+      this.pendingMessageContext = null;
+      this.pendingMessage = null;
+    }
+  }
+
+  private processPendingHalfClose() {
+    if (this.pendingHalfClose) {
+      this.nextCall.halfClose();
+    }
+  }
+
+  start(
+    metadata: Metadata,
+    interceptingListener?: Partial<InterceptingListener>
+  ): void {
+    const fullInterceptingListener: InterceptingListener = {
+      onReceiveMetadata:
+        interceptingListener?.onReceiveMetadata?.bind(interceptingListener) ??
+        (metadata => {}),
+      onReceiveMessage:
+        interceptingListener?.onReceiveMessage?.bind(interceptingListener) ??
+        (message => {}),
+      onReceiveStatus:
+        interceptingListener?.onReceiveStatus?.bind(interceptingListener) ??
+        (status => {}),
+    };
+    this.processingMetadata = true;
+    this.requester.start(metadata, fullInterceptingListener, (md, listener) => {
+      this.processingMetadata = false;
+      let finalInterceptingListener: InterceptingListener;
+      if (isInterceptingListener(listener)) {
+        finalInterceptingListener = listener;
+      } else {
+        const fullListener: FullListener = {
+          onReceiveMetadata:
+            listener.onReceiveMetadata ?? defaultListener.onReceiveMetadata,
+          onReceiveMessage:
+            listener.onReceiveMessage ?? defaultListener.onReceiveMessage,
+          onReceiveStatus:
+            listener.onReceiveStatus ?? defaultListener.onReceiveStatus,
+        };
+        finalInterceptingListener = new InterceptingListenerImpl(
+          fullListener,
+          fullInterceptingListener
+        );
+      }
+      this.nextCall.start(md, finalInterceptingListener);
+      this.processPendingMessage();
+      this.processPendingHalfClose();
+    });
+  }
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  sendMessageWithContext(context: MessageContext, message: any): void {
+    this.processingMessage = true;
+    this.requester.sendMessage(message, finalMessage => {
+      this.processingMessage = false;
+      if (this.processingMetadata) {
+        this.pendingMessageContext = context;
+        this.pendingMessage = message;
+      } else {
+        this.nextCall.sendMessageWithContext(context, finalMessage);
+        this.processPendingHalfClose();
+      }
+    });
+  }
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  sendMessage(message: any): void {
+    this.sendMessageWithContext({}, message);
+  }
+  startRead(): void {
+    this.nextCall.startRead();
+  }
+  halfClose(): void {
+    this.requester.halfClose(() => {
+      if (this.processingMetadata || this.processingMessage) {
+        this.pendingHalfClose = true;
+      } else {
+        this.nextCall.halfClose();
+      }
+    });
+  }
+}
+
+function getCall(channel: Channel, path: string, options: CallOptions): Call {
+  const deadline = options.deadline ?? Infinity;
+  const host = options.host;
+  const parent = options.parent ?? null;
+  const propagateFlags = options.propagate_flags;
+  const credentials = options.credentials;
+  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 implements InterceptingCallInterface {
+  constructor(
+    protected call: Call,
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    protected methodDefinition: ClientMethodDefinition<any, any>
+  ) {}
+  cancelWithStatus(status: Status, details: string): void {
+    this.call.cancelWithStatus(status, details);
+  }
+  getPeer(): string {
+    return this.call.getPeer();
+  }
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  sendMessageWithContext(context: MessageContext, message: any): void {
+    let serialized: Buffer;
+    try {
+      serialized = this.methodDefinition.requestSerialize(message);
+    } catch (e) {
+      this.call.cancelWithStatus(
+        Status.INTERNAL,
+        `Request message serialization failure: ${getErrorMessage(e)}`
+      );
+      return;
+    }
+    this.call.sendMessageWithContext(context, serialized);
+  }
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  sendMessage(message: any) {
+    this.sendMessageWithContext({}, message);
+  }
+  start(
+    metadata: Metadata,
+    interceptingListener?: Partial<InterceptingListener>
+  ): void {
+    let readError: StatusObject | null = null;
+    this.call.start(metadata, {
+      onReceiveMetadata: metadata => {
+        interceptingListener?.onReceiveMetadata?.(metadata);
+      },
+      onReceiveMessage: message => {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        let deserialized: any;
+        try {
+          deserialized = this.methodDefinition.responseDeserialize(message);
+        } catch (e) {
+          readError = {
+            code: Status.INTERNAL,
+            details: `Response message parsing error: ${getErrorMessage(e)}`,
+            metadata: new Metadata(),
+          };
+          this.call.cancelWithStatus(readError.code, readError.details);
+          return;
+        }
+        interceptingListener?.onReceiveMessage?.(deserialized);
+      },
+      onReceiveStatus: status => {
+        if (readError) {
+          interceptingListener?.onReceiveStatus?.(readError);
+        } else {
+          interceptingListener?.onReceiveStatus?.(status);
+        }
+      },
+    });
+  }
+  startRead() {
+    this.call.startRead();
+  }
+  halfClose(): void {
+    this.call.halfClose();
+  }
+}
+
+/**
+ * BaseInterceptingCall with special-cased behavior for methods with unary
+ * responses.
+ */
+class BaseUnaryInterceptingCall
+  extends BaseInterceptingCall
+  implements InterceptingCallInterface
+{
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  constructor(call: Call, methodDefinition: ClientMethodDefinition<any, any>) {
+    super(call, methodDefinition);
+  }
+  start(metadata: Metadata, listener?: Partial<InterceptingListener>): void {
+    let receivedMessage = false;
+    const wrapperListener: InterceptingListener = {
+      onReceiveMetadata:
+        listener?.onReceiveMetadata?.bind(listener) ?? (metadata => {}),
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      onReceiveMessage: (message: any) => {
+        receivedMessage = true;
+        listener?.onReceiveMessage?.(message);
+      },
+      onReceiveStatus: (status: StatusObject) => {
+        if (!receivedMessage) {
+          listener?.onReceiveMessage?.(null);
+        }
+        listener?.onReceiveStatus?.(status);
+      },
+    };
+    super.start(metadata, wrapperListener);
+    this.call.startRead();
+  }
+}
+
+/**
+ * BaseInterceptingCall with special-cased behavior for methods with streaming
+ * responses.
+ */
+class BaseStreamingInterceptingCall
+  extends BaseInterceptingCall
+  implements InterceptingCallInterface {}
+
+function getBottomInterceptingCall(
+  channel: Channel,
+  options: InterceptorOptions,
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  methodDefinition: ClientMethodDefinition<any, any>
+) {
+  const call = getCall(channel, methodDefinition.path, options);
+  if (methodDefinition.responseStream) {
+    return new BaseStreamingInterceptingCall(call, methodDefinition);
+  } else {
+    return new BaseUnaryInterceptingCall(call, methodDefinition);
+  }
+}
+
+export interface NextCall {
+  (options: InterceptorOptions): InterceptingCallInterface;
+}
+
+export interface Interceptor {
+  (options: InterceptorOptions, nextCall: NextCall): InterceptingCall;
+}
+
+export interface InterceptorProvider {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  (methodDefinition: ClientMethodDefinition<any, any>): Interceptor;
+}
+
+export interface InterceptorArguments {
+  clientInterceptors: Interceptor[];
+  clientInterceptorProviders: InterceptorProvider[];
+  callInterceptors: Interceptor[];
+  callInterceptorProviders: InterceptorProvider[];
+}
+
+export function getInterceptingCall(
+  interceptorArgs: InterceptorArguments,
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  methodDefinition: ClientMethodDefinition<any, any>,
+  options: CallOptions,
+  channel: Channel
+): InterceptingCallInterface {
+  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: Interceptor[] = [];
+  // Interceptors passed to the call override interceptors passed to the client constructor
+  if (
+    interceptorArgs.callInterceptors.length > 0 ||
+    interceptorArgs.callInterceptorProviders.length > 0
+  ) {
+    interceptors = ([] as Interceptor[])
+      .concat(
+        interceptorArgs.callInterceptors,
+        interceptorArgs.callInterceptorProviders.map(provider =>
+          provider(methodDefinition)
+        )
+      )
+      .filter(interceptor => interceptor);
+    // Filter out falsy values when providers return nothing
+  } else {
+    interceptors = ([] as Interceptor[])
+      .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: NextCall = interceptors.reduceRight<NextCall>(
+    (nextCall: NextCall, nextInterceptor: Interceptor) => {
+      return currentOptions => nextInterceptor(currentOptions, nextCall);
+    },
+    (finalOptions: InterceptorOptions) =>
+      getBottomInterceptingCall(channel, finalOptions, methodDefinition)
+  );
+  return getCall(interceptorOptions);
+}

travel-backend/node_modules/@grpc/grpc-js/src/client.ts

@@ -0,0 +1,715 @@
+/*
+ * 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.
+ *
+ */
+
+import {
+  ClientDuplexStream,
+  ClientDuplexStreamImpl,
+  ClientReadableStream,
+  ClientReadableStreamImpl,
+  ClientUnaryCall,
+  ClientUnaryCallImpl,
+  ClientWritableStream,
+  ClientWritableStreamImpl,
+  ServiceError,
+  callErrorFromStatus,
+  SurfaceCall,
+} from './call';
+import { CallCredentials } from './call-credentials';
+import { StatusObject } from './call-interface';
+import { Channel, ChannelImplementation } from './channel';
+import { ConnectivityState } from './connectivity-state';
+import { ChannelCredentials } from './channel-credentials';
+import { ChannelOptions } from './channel-options';
+import { Status } from './constants';
+import { Metadata } from './metadata';
+import { ClientMethodDefinition } from './make-client';
+import {
+  getInterceptingCall,
+  Interceptor,
+  InterceptorProvider,
+  InterceptorArguments,
+  InterceptingCallInterface,
+} from './client-interceptors';
+import {
+  ServerUnaryCall,
+  ServerReadableStream,
+  ServerWritableStream,
+  ServerDuplexStream,
+} from './server-call';
+import { Deadline } from './deadline';
+
+const CHANNEL_SYMBOL = Symbol();
+const INTERCEPTOR_SYMBOL = Symbol();
+const INTERCEPTOR_PROVIDER_SYMBOL = Symbol();
+const CALL_INVOCATION_TRANSFORMER_SYMBOL = Symbol();
+
+function isFunction<ResponseType>(
+  arg: Metadata | CallOptions | UnaryCallback<ResponseType> | undefined
+): arg is UnaryCallback<ResponseType> {
+  return typeof arg === 'function';
+}
+
+export interface UnaryCallback<ResponseType> {
+  (err: ServiceError | null, value?: ResponseType): void;
+}
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+export interface CallOptions {
+  deadline?: Deadline;
+  host?: string;
+  parent?:
+    | ServerUnaryCall<any, any>
+    | ServerReadableStream<any, any>
+    | ServerWritableStream<any, any>
+    | ServerDuplexStream<any, any>;
+  propagate_flags?: number;
+  credentials?: CallCredentials;
+  interceptors?: Interceptor[];
+  interceptor_providers?: InterceptorProvider[];
+}
+/* eslint-enable @typescript-eslint/no-explicit-any */
+
+export interface CallProperties<RequestType, ResponseType> {
+  argument?: RequestType;
+  metadata: Metadata;
+  call: SurfaceCall;
+  channel: Channel;
+  methodDefinition: ClientMethodDefinition<RequestType, ResponseType>;
+  callOptions: CallOptions;
+  callback?: UnaryCallback<ResponseType>;
+}
+
+export interface CallInvocationTransformer {
+  (callProperties: CallProperties<any, any>): CallProperties<any, any>; // eslint-disable-line @typescript-eslint/no-explicit-any
+}
+
+export type ClientOptions = Partial<ChannelOptions> & {
+  channelOverride?: Channel;
+  channelFactoryOverride?: (
+    address: string,
+    credentials: ChannelCredentials,
+    options: ClientOptions
+  ) => Channel;
+  interceptors?: Interceptor[];
+  interceptor_providers?: InterceptorProvider[];
+  callInvocationTransformer?: CallInvocationTransformer;
+};
+
+function getErrorStackString(error: Error): string {
+  return error.stack!.split('\n').slice(1).join('\n');
+}
+
+/**
+ * A generic gRPC client. Primarily useful as a base class for all generated
+ * clients.
+ */
+export class Client {
+  private readonly [CHANNEL_SYMBOL]: Channel;
+  private readonly [INTERCEPTOR_SYMBOL]: Interceptor[];
+  private readonly [INTERCEPTOR_PROVIDER_SYMBOL]: InterceptorProvider[];
+  private readonly [CALL_INVOCATION_TRANSFORMER_SYMBOL]?: CallInvocationTransformer;
+  constructor(
+    address: string,
+    credentials: ChannelCredentials,
+    options: ClientOptions = {}
+  ) {
+    options = Object.assign({}, options);
+    this[INTERCEPTOR_SYMBOL] = options.interceptors ?? [];
+    delete options.interceptors;
+    this[INTERCEPTOR_PROVIDER_SYMBOL] = options.interceptor_providers ?? [];
+    delete options.interceptor_providers;
+    if (
+      this[INTERCEPTOR_SYMBOL].length > 0 &&
+      this[INTERCEPTOR_PROVIDER_SYMBOL].length > 0
+    ) {
+      throw new Error(
+        'Both interceptors and interceptor_providers were passed as options ' +
+          'to the client constructor. Only one of these is allowed.'
+      );
+    }
+    this[CALL_INVOCATION_TRANSFORMER_SYMBOL] =
+      options.callInvocationTransformer;
+    delete options.callInvocationTransformer;
+    if (options.channelOverride) {
+      this[CHANNEL_SYMBOL] = options.channelOverride;
+    } else if (options.channelFactoryOverride) {
+      const channelFactoryOverride = options.channelFactoryOverride;
+      delete options.channelFactoryOverride;
+      this[CHANNEL_SYMBOL] = channelFactoryOverride(
+        address,
+        credentials,
+        options
+      );
+    } else {
+      this[CHANNEL_SYMBOL] = new ChannelImplementation(
+        address,
+        credentials,
+        options
+      );
+    }
+  }
+
+  close(): void {
+    this[CHANNEL_SYMBOL].close();
+  }
+
+  getChannel(): Channel {
+    return this[CHANNEL_SYMBOL];
+  }
+
+  waitForReady(deadline: Deadline, callback: (error?: Error) => void): void {
+    const checkState = (err?: Error) => {
+      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 === ConnectivityState.READY) {
+        callback();
+      } else {
+        try {
+          this[CHANNEL_SYMBOL].watchConnectivityState(
+            newState,
+            deadline,
+            checkState
+          );
+        } catch (e) {
+          callback(new Error('The channel has been closed'));
+        }
+      }
+    };
+    setImmediate(checkState);
+  }
+
+  private checkOptionalUnaryResponseArguments<ResponseType>(
+    arg1: Metadata | CallOptions | UnaryCallback<ResponseType>,
+    arg2?: CallOptions | UnaryCallback<ResponseType>,
+    arg3?: UnaryCallback<ResponseType>
+  ): {
+    metadata: Metadata;
+    options: CallOptions;
+    callback: UnaryCallback<ResponseType>;
+  } {
+    if (isFunction(arg1)) {
+      return { metadata: new Metadata(), options: {}, callback: arg1 };
+    } else if (isFunction(arg2)) {
+      if (arg1 instanceof Metadata) {
+        return { metadata: arg1, options: {}, callback: arg2 };
+      } else {
+        return { metadata: new Metadata(), options: arg1, callback: arg2 };
+      }
+    } else {
+      if (
+        !(
+          arg1 instanceof Metadata &&
+          arg2 instanceof Object &&
+          isFunction(arg3)
+        )
+      ) {
+        throw new Error('Incorrect arguments passed');
+      }
+      return { metadata: arg1, options: arg2, callback: arg3 };
+    }
+  }
+
+  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;
+  makeUnaryRequest<RequestType, ResponseType>(
+    method: string,
+    serialize: (value: RequestType) => Buffer,
+    deserialize: (value: Buffer) => ResponseType,
+    argument: RequestType,
+    metadata: Metadata | CallOptions | UnaryCallback<ResponseType>,
+    options?: CallOptions | UnaryCallback<ResponseType>,
+    callback?: UnaryCallback<ResponseType>
+  ): ClientUnaryCall {
+    const checkedArguments =
+      this.checkOptionalUnaryResponseArguments<ResponseType>(
+        metadata,
+        options,
+        callback
+      );
+    const methodDefinition: ClientMethodDefinition<RequestType, ResponseType> =
+      {
+        path: method,
+        requestStream: false,
+        responseStream: false,
+        requestSerialize: serialize,
+        responseDeserialize: deserialize,
+      };
+    let callProperties: CallProperties<RequestType, ResponseType> = {
+      argument: argument,
+      metadata: checkedArguments.metadata,
+      call: new ClientUnaryCallImpl(),
+      channel: this[CHANNEL_SYMBOL],
+      methodDefinition: methodDefinition,
+      callOptions: checkedArguments.options,
+      callback: checkedArguments.callback,
+    };
+    if (this[CALL_INVOCATION_TRANSFORMER_SYMBOL]) {
+      callProperties = this[CALL_INVOCATION_TRANSFORMER_SYMBOL]!(
+        callProperties
+      ) as CallProperties<RequestType, ResponseType>;
+    }
+    const emitter: ClientUnaryCall = callProperties.call;
+    const interceptorArgs: InterceptorArguments = {
+      clientInterceptors: this[INTERCEPTOR_SYMBOL],
+      clientInterceptorProviders: this[INTERCEPTOR_PROVIDER_SYMBOL],
+      callInterceptors: callProperties.callOptions.interceptors ?? [],
+      callInterceptorProviders:
+        callProperties.callOptions.interceptor_providers ?? [],
+    };
+    const call: InterceptingCallInterface = getInterceptingCall(
+      interceptorArgs,
+      callProperties.methodDefinition,
+      callProperties.callOptions,
+      callProperties.channel
+    );
+    /* This needs to happen before the emitter is used. Unfortunately we can't
+     * enforce this with the type system. We need to construct this emitter
+     * before calling the CallInvocationTransformer, and we need to create the
+     * call after that. */
+    emitter.call = call;
+    let responseMessage: ResponseType | null = null;
+    let receivedStatus = false;
+    let callerStackError: Error | null = new Error();
+    call.start(callProperties.metadata, {
+      onReceiveMetadata: metadata => {
+        emitter.emit('metadata', metadata);
+      },
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      onReceiveMessage(message: any) {
+        if (responseMessage !== null) {
+          call.cancelWithStatus(Status.INTERNAL, 'Too many responses received');
+        }
+        responseMessage = message;
+      },
+      onReceiveStatus(status: StatusObject) {
+        if (receivedStatus) {
+          return;
+        }
+        receivedStatus = true;
+        if (status.code === Status.OK) {
+          if (responseMessage === null) {
+            const callerStack = getErrorStackString(callerStackError!);
+            callProperties.callback!(
+              callErrorFromStatus(
+                {
+                  code: Status.INTERNAL,
+                  details: 'No message received',
+                  metadata: status.metadata,
+                },
+                callerStack
+              )
+            );
+          } else {
+            callProperties.callback!(null, responseMessage);
+          }
+        } else {
+          const callerStack = getErrorStackString(callerStackError!);
+          callProperties.callback!(callErrorFromStatus(status, callerStack));
+        }
+        /* Avoid retaining the callerStackError object in the call context of
+         * the status event handler. */
+        callerStackError = null;
+        emitter.emit('status', status);
+      },
+    });
+    call.sendMessage(argument);
+    call.halfClose();
+    return emitter;
+  }
+
+  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>;
+  makeClientStreamRequest<RequestType, ResponseType>(
+    method: string,
+    serialize: (value: RequestType) => Buffer,
+    deserialize: (value: Buffer) => ResponseType,
+    metadata: Metadata | CallOptions | UnaryCallback<ResponseType>,
+    options?: CallOptions | UnaryCallback<ResponseType>,
+    callback?: UnaryCallback<ResponseType>
+  ): ClientWritableStream<RequestType> {
+    const checkedArguments =
+      this.checkOptionalUnaryResponseArguments<ResponseType>(
+        metadata,
+        options,
+        callback
+      );
+    const methodDefinition: ClientMethodDefinition<RequestType, ResponseType> =
+      {
+        path: method,
+        requestStream: true,
+        responseStream: false,
+        requestSerialize: serialize,
+        responseDeserialize: deserialize,
+      };
+    let callProperties: CallProperties<RequestType, ResponseType> = {
+      metadata: checkedArguments.metadata,
+      call: new ClientWritableStreamImpl<RequestType>(serialize),
+      channel: this[CHANNEL_SYMBOL],
+      methodDefinition: methodDefinition,
+      callOptions: checkedArguments.options,
+      callback: checkedArguments.callback,
+    };
+    if (this[CALL_INVOCATION_TRANSFORMER_SYMBOL]) {
+      callProperties = this[CALL_INVOCATION_TRANSFORMER_SYMBOL]!(
+        callProperties
+      ) as CallProperties<RequestType, ResponseType>;
+    }
+    const emitter: ClientWritableStream<RequestType> =
+      callProperties.call as ClientWritableStream<RequestType>;
+    const interceptorArgs: InterceptorArguments = {
+      clientInterceptors: this[INTERCEPTOR_SYMBOL],
+      clientInterceptorProviders: this[INTERCEPTOR_PROVIDER_SYMBOL],
+      callInterceptors: callProperties.callOptions.interceptors ?? [],
+      callInterceptorProviders:
+        callProperties.callOptions.interceptor_providers ?? [],
+    };
+    const call: InterceptingCallInterface = getInterceptingCall(
+      interceptorArgs,
+      callProperties.methodDefinition,
+      callProperties.callOptions,
+      callProperties.channel
+    );
+    /* This needs to happen before the emitter is used. Unfortunately we can't
+     * enforce this with the type system. We need to construct this emitter
+     * before calling the CallInvocationTransformer, and we need to create the
+     * call after that. */
+    emitter.call = call;
+    let responseMessage: ResponseType | null = null;
+    let receivedStatus = false;
+    let callerStackError: Error | null = new Error();
+    call.start(callProperties.metadata, {
+      onReceiveMetadata: metadata => {
+        emitter.emit('metadata', metadata);
+      },
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      onReceiveMessage(message: any) {
+        if (responseMessage !== null) {
+          call.cancelWithStatus(Status.INTERNAL, 'Too many responses received');
+        }
+        responseMessage = message;
+      },
+      onReceiveStatus(status: StatusObject) {
+        if (receivedStatus) {
+          return;
+        }
+        receivedStatus = true;
+        if (status.code === Status.OK) {
+          if (responseMessage === null) {
+            const callerStack = getErrorStackString(callerStackError!);
+            callProperties.callback!(
+              callErrorFromStatus(
+                {
+                  code: Status.INTERNAL,
+                  details: 'No message received',
+                  metadata: status.metadata,
+                },
+                callerStack
+              )
+            );
+          } else {
+            callProperties.callback!(null, responseMessage);
+          }
+        } else {
+          const callerStack = getErrorStackString(callerStackError!);
+          callProperties.callback!(callErrorFromStatus(status, callerStack));
+        }
+        /* Avoid retaining the callerStackError object in the call context of
+         * the status event handler. */
+        callerStackError = null;
+        emitter.emit('status', status);
+      },
+    });
+    return emitter;
+  }
+
+  private checkMetadataAndOptions(
+    arg1?: Metadata | CallOptions,
+    arg2?: CallOptions
+  ): { metadata: Metadata; options: CallOptions } {
+    let metadata: Metadata;
+    let options: CallOptions;
+    if (arg1 instanceof Metadata) {
+      metadata = arg1;
+      if (arg2) {
+        options = arg2;
+      } else {
+        options = {};
+      }
+    } else {
+      if (arg1) {
+        options = arg1;
+      } else {
+        options = {};
+      }
+      metadata = new Metadata();
+    }
+    return { metadata, options };
+  }
+
+  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>;
+  makeServerStreamRequest<RequestType, ResponseType>(
+    method: string,
+    serialize: (value: RequestType) => Buffer,
+    deserialize: (value: Buffer) => ResponseType,
+    argument: RequestType,
+    metadata?: Metadata | CallOptions,
+    options?: CallOptions
+  ): ClientReadableStream<ResponseType> {
+    const checkedArguments = this.checkMetadataAndOptions(metadata, options);
+    const methodDefinition: ClientMethodDefinition<RequestType, ResponseType> =
+      {
+        path: method,
+        requestStream: false,
+        responseStream: true,
+        requestSerialize: serialize,
+        responseDeserialize: deserialize,
+      };
+    let callProperties: CallProperties<RequestType, ResponseType> = {
+      argument: argument,
+      metadata: checkedArguments.metadata,
+      call: new ClientReadableStreamImpl<ResponseType>(deserialize),
+      channel: this[CHANNEL_SYMBOL],
+      methodDefinition: methodDefinition,
+      callOptions: checkedArguments.options,
+    };
+    if (this[CALL_INVOCATION_TRANSFORMER_SYMBOL]) {
+      callProperties = this[CALL_INVOCATION_TRANSFORMER_SYMBOL]!(
+        callProperties
+      ) as CallProperties<RequestType, ResponseType>;
+    }
+    const stream: ClientReadableStream<ResponseType> =
+      callProperties.call as ClientReadableStream<ResponseType>;
+    const interceptorArgs: InterceptorArguments = {
+      clientInterceptors: this[INTERCEPTOR_SYMBOL],
+      clientInterceptorProviders: this[INTERCEPTOR_PROVIDER_SYMBOL],
+      callInterceptors: callProperties.callOptions.interceptors ?? [],
+      callInterceptorProviders:
+        callProperties.callOptions.interceptor_providers ?? [],
+    };
+    const call: InterceptingCallInterface = getInterceptingCall(
+      interceptorArgs,
+      callProperties.methodDefinition,
+      callProperties.callOptions,
+      callProperties.channel
+    );
+    /* This needs to happen before the emitter is used. Unfortunately we can't
+     * enforce this with the type system. We need to construct this emitter
+     * before calling the CallInvocationTransformer, and we need to create the
+     * call after that. */
+    stream.call = call;
+    let receivedStatus = false;
+    let callerStackError: Error | null = new Error();
+    call.start(callProperties.metadata, {
+      onReceiveMetadata(metadata: Metadata) {
+        stream.emit('metadata', metadata);
+      },
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      onReceiveMessage(message: any) {
+        stream.push(message);
+      },
+      onReceiveStatus(status: StatusObject) {
+        if (receivedStatus) {
+          return;
+        }
+        receivedStatus = true;
+        stream.push(null);
+        if (status.code !== Status.OK) {
+          const callerStack = getErrorStackString(callerStackError!);
+          stream.emit('error', callErrorFromStatus(status, callerStack));
+        }
+        /* Avoid retaining the callerStackError object in the call context of
+         * the status event handler. */
+        callerStackError = null;
+        stream.emit('status', status);
+      },
+    });
+    call.sendMessage(argument);
+    call.halfClose();
+    return stream;
+  }
+
+  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>;
+  makeBidiStreamRequest<RequestType, ResponseType>(
+    method: string,
+    serialize: (value: RequestType) => Buffer,
+    deserialize: (value: Buffer) => ResponseType,
+    metadata?: Metadata | CallOptions,
+    options?: CallOptions
+  ): ClientDuplexStream<RequestType, ResponseType> {
+    const checkedArguments = this.checkMetadataAndOptions(metadata, options);
+    const methodDefinition: ClientMethodDefinition<RequestType, ResponseType> =
+      {
+        path: method,
+        requestStream: true,
+        responseStream: true,
+        requestSerialize: serialize,
+        responseDeserialize: deserialize,
+      };
+    let callProperties: CallProperties<RequestType, ResponseType> = {
+      metadata: checkedArguments.metadata,
+      call: new ClientDuplexStreamImpl<RequestType, ResponseType>(
+        serialize,
+        deserialize
+      ),
+      channel: this[CHANNEL_SYMBOL],
+      methodDefinition: methodDefinition,
+      callOptions: checkedArguments.options,
+    };
+    if (this[CALL_INVOCATION_TRANSFORMER_SYMBOL]) {
+      callProperties = this[CALL_INVOCATION_TRANSFORMER_SYMBOL]!(
+        callProperties
+      ) as CallProperties<RequestType, ResponseType>;
+    }
+    const stream: ClientDuplexStream<RequestType, ResponseType> =
+      callProperties.call as ClientDuplexStream<RequestType, ResponseType>;
+    const interceptorArgs: InterceptorArguments = {
+      clientInterceptors: this[INTERCEPTOR_SYMBOL],
+      clientInterceptorProviders: this[INTERCEPTOR_PROVIDER_SYMBOL],
+      callInterceptors: callProperties.callOptions.interceptors ?? [],
+      callInterceptorProviders:
+        callProperties.callOptions.interceptor_providers ?? [],
+    };
+    const call: InterceptingCallInterface = getInterceptingCall(
+      interceptorArgs,
+      callProperties.methodDefinition,
+      callProperties.callOptions,
+      callProperties.channel
+    );
+    /* This needs to happen before the emitter is used. Unfortunately we can't
+     * enforce this with the type system. We need to construct this emitter
+     * before calling the CallInvocationTransformer, and we need to create the
+     * call after that. */
+    stream.call = call;
+    let receivedStatus = false;
+    let callerStackError: Error | null = new Error();
+    call.start(callProperties.metadata, {
+      onReceiveMetadata(metadata: Metadata) {
+        stream.emit('metadata', metadata);
+      },
+      onReceiveMessage(message: Buffer) {
+        stream.push(message);
+      },
+      onReceiveStatus(status: StatusObject) {
+        if (receivedStatus) {
+          return;
+        }
+        receivedStatus = true;
+        stream.push(null);
+        if (status.code !== Status.OK) {
+          const callerStack = getErrorStackString(callerStackError!);
+          stream.emit('error', callErrorFromStatus(status, callerStack));
+        }
+        /* Avoid retaining the callerStackError object in the call context of
+         * the status event handler. */
+        callerStackError = null;
+        stream.emit('status', status);
+      },
+    });
+    return stream;
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/compression-algorithms.ts

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2021 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.
+ *
+ */
+
+export enum CompressionAlgorithms {
+  identity = 0,
+  deflate = 1,
+  gzip = 2,
+}

travel-backend/node_modules/@grpc/grpc-js/src/compression-filter.ts

@@ -0,0 +1,350 @@
+/*
+ * 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.
+ *
+ */
+
+import * as zlib from 'zlib';
+
+import { WriteObject, WriteFlags } from './call-interface';
+import { Channel } from './channel';
+import { ChannelOptions } from './channel-options';
+import { CompressionAlgorithms } from './compression-algorithms';
+import { DEFAULT_MAX_RECEIVE_MESSAGE_LENGTH, LogVerbosity, Status } from './constants';
+import { BaseFilter, Filter, FilterFactory } from './filter';
+import * as logging from './logging';
+import { Metadata, MetadataValue } from './metadata';
+
+const isCompressionAlgorithmKey = (
+  key: number
+): key is CompressionAlgorithms => {
+  return (
+    typeof key === 'number' && typeof CompressionAlgorithms[key] === 'string'
+  );
+};
+
+type CompressionAlgorithm = keyof typeof CompressionAlgorithms;
+
+type SharedCompressionFilterConfig = {
+  serverSupportedEncodingHeader?: string;
+};
+
+abstract class CompressionHandler {
+  protected abstract compressMessage(message: Buffer): Promise<Buffer>;
+  protected abstract decompressMessage(data: Buffer): Promise<Buffer>;
+  /**
+   * @param message Raw uncompressed message bytes
+   * @param compress Indicates whether the message should be compressed
+   * @return Framed message, compressed if applicable
+   */
+  async writeMessage(message: Buffer, compress: boolean): Promise<Buffer> {
+    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: Buffer): Promise<Buffer> {
+    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: Buffer) {
+    return message;
+  }
+
+  async writeMessage(message: Buffer, compress: boolean): Promise<Buffer> {
+    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: Buffer): Promise<Buffer> {
+    return Promise.reject<Buffer>(
+      new Error(
+        'Received compressed message but "grpc-encoding" header was identity'
+      )
+    );
+  }
+}
+
+class DeflateHandler extends CompressionHandler {
+  constructor(private maxRecvMessageLength: number) {
+    super();
+  }
+
+  compressMessage(message: Buffer) {
+    return new Promise<Buffer>((resolve, reject) => {
+      zlib.deflate(message, (err, output) => {
+        if (err) {
+          reject(err);
+        } else {
+          resolve(output);
+        }
+      });
+    });
+  }
+
+  decompressMessage(message: Buffer) {
+    return new Promise<Buffer>((resolve, reject) => {
+      let totalLength = 0;
+      const messageParts: Buffer[] = [];
+      const decompresser = zlib.createInflate();
+      decompresser.on('data', (chunk: Buffer) => {
+        messageParts.push(chunk);
+        totalLength += chunk.byteLength;
+        if (this.maxRecvMessageLength !== -1 && totalLength > this.maxRecvMessageLength) {
+          decompresser.destroy();
+          reject({
+            code: Status.RESOURCE_EXHAUSTED,
+            details: `Received message that decompresses to a size larger than ${this.maxRecvMessageLength}`
+          });
+        }
+      });
+      decompresser.on('end', () => {
+        resolve(Buffer.concat(messageParts));
+      });
+      decompresser.write(message);
+      decompresser.end();
+    });
+  }
+}
+
+class GzipHandler extends CompressionHandler {
+  constructor(private maxRecvMessageLength: number) {
+    super();
+  }
+
+  compressMessage(message: Buffer) {
+    return new Promise<Buffer>((resolve, reject) => {
+      zlib.gzip(message, (err, output) => {
+        if (err) {
+          reject(err);
+        } else {
+          resolve(output);
+        }
+      });
+    });
+  }
+
+  decompressMessage(message: Buffer) {
+    return new Promise<Buffer>((resolve, reject) => {
+      let totalLength = 0;
+      const messageParts: Buffer[] = [];
+      const decompresser = zlib.createGunzip();
+      decompresser.on('data', (chunk: Buffer) => {
+        messageParts.push(chunk);
+        totalLength += chunk.byteLength;
+        if (this.maxRecvMessageLength !== -1 && totalLength > this.maxRecvMessageLength) {
+          decompresser.destroy();
+          reject({
+            code: Status.RESOURCE_EXHAUSTED,
+            details: `Received message that decompresses to a size larger than ${this.maxRecvMessageLength}`
+          });
+        }
+      });
+      decompresser.on('end', () => {
+        resolve(Buffer.concat(messageParts));
+      });
+      decompresser.write(message);
+      decompresser.end();
+    });
+  }
+}
+
+class UnknownHandler extends CompressionHandler {
+  constructor(private readonly compressionName: string) {
+    super();
+  }
+  compressMessage(message: Buffer): Promise<Buffer> {
+    return Promise.reject<Buffer>(
+      new Error(
+        `Received message compressed with unsupported compression method ${this.compressionName}`
+      )
+    );
+  }
+
+  decompressMessage(message: Buffer): Promise<Buffer> {
+    // This should be unreachable
+    return Promise.reject<Buffer>(
+      new Error(`Compression method not supported: ${this.compressionName}`)
+    );
+  }
+}
+
+function getCompressionHandler(compressionName: string, maxReceiveMessageSize: number): CompressionHandler {
+  switch (compressionName) {
+    case 'identity':
+      return new IdentityHandler();
+    case 'deflate':
+      return new DeflateHandler(maxReceiveMessageSize);
+    case 'gzip':
+      return new GzipHandler(maxReceiveMessageSize);
+    default:
+      return new UnknownHandler(compressionName);
+  }
+}
+
+export class CompressionFilter extends BaseFilter implements Filter {
+  private sendCompression: CompressionHandler = new IdentityHandler();
+  private receiveCompression: CompressionHandler = new IdentityHandler();
+  private currentCompressionAlgorithm: CompressionAlgorithm = 'identity';
+  private maxReceiveMessageLength: number;
+
+  constructor(
+    channelOptions: ChannelOptions,
+    private sharedFilterConfig: SharedCompressionFilterConfig
+  ) {
+    super();
+
+    const compressionAlgorithmKey =
+      channelOptions['grpc.default_compression_algorithm'];
+    this.maxReceiveMessageLength = channelOptions['grpc.max_receive_message_length'] ?? DEFAULT_MAX_RECEIVE_MESSAGE_LENGTH
+    if (compressionAlgorithmKey !== undefined) {
+      if (isCompressionAlgorithmKey(compressionAlgorithmKey)) {
+        const clientSelectedEncoding = CompressionAlgorithms[
+          compressionAlgorithmKey
+        ] as CompressionAlgorithm;
+        const serverSupportedEncodings =
+          sharedFilterConfig.serverSupportedEncodingHeader?.split(',');
+        /**
+         * There are two possible situations here:
+         * 1) We don't have any info yet from the server about what compression it supports
+         *    In that case we should just use what the client tells us to use
+         * 2) We've previously received a response from the server including a grpc-accept-encoding header
+         *    In that case we only want to use the encoding chosen by the client if the server supports it
+         */
+        if (
+          !serverSupportedEncodings ||
+          serverSupportedEncodings.includes(clientSelectedEncoding)
+        ) {
+          this.currentCompressionAlgorithm = clientSelectedEncoding;
+          this.sendCompression = getCompressionHandler(
+            this.currentCompressionAlgorithm,
+            -1
+          );
+        }
+      } else {
+        logging.log(
+          LogVerbosity.ERROR,
+          `Invalid value provided for grpc.default_compression_algorithm option: ${compressionAlgorithmKey}`
+        );
+      }
+    }
+  }
+
+  async sendMetadata(metadata: Promise<Metadata>): Promise<Metadata> {
+    const headers: Metadata = await metadata;
+    headers.set('grpc-accept-encoding', 'identity,deflate,gzip');
+    headers.set('accept-encoding', 'identity');
+
+    // No need to send the header if it's "identity" -  behavior is identical; save the bandwidth
+    if (this.currentCompressionAlgorithm === 'identity') {
+      headers.remove('grpc-encoding');
+    } else {
+      headers.set('grpc-encoding', this.currentCompressionAlgorithm);
+    }
+
+    return headers;
+  }
+
+  receiveMetadata(metadata: Metadata): Metadata {
+    const receiveEncoding: MetadataValue[] = metadata.get('grpc-encoding');
+    if (receiveEncoding.length > 0) {
+      const encoding: MetadataValue = receiveEncoding[0];
+      if (typeof encoding === 'string') {
+        this.receiveCompression = getCompressionHandler(encoding, this.maxReceiveMessageLength);
+      }
+    }
+    metadata.remove('grpc-encoding');
+
+    /* Check to see if the compression we're using to send messages is supported by the server
+     * If not, reset the sendCompression filter and have it use the default IdentityHandler */
+    const serverSupportedEncodingsHeader = metadata.get(
+      'grpc-accept-encoding'
+    )[0] as string | undefined;
+    if (serverSupportedEncodingsHeader) {
+      this.sharedFilterConfig.serverSupportedEncodingHeader =
+        serverSupportedEncodingsHeader;
+      const serverSupportedEncodings =
+        serverSupportedEncodingsHeader.split(',');
+
+      if (
+        !serverSupportedEncodings.includes(this.currentCompressionAlgorithm)
+      ) {
+        this.sendCompression = new IdentityHandler();
+        this.currentCompressionAlgorithm = 'identity';
+      }
+    }
+    metadata.remove('grpc-accept-encoding');
+    return metadata;
+  }
+
+  async sendMessage(message: Promise<WriteObject>): Promise<WriteObject> {
+    /* 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: WriteObject = await message;
+    let compress: boolean;
+    if (this.sendCompression instanceof IdentityHandler) {
+      compress = false;
+    } else {
+      compress = ((resolvedMessage.flags ?? 0) & WriteFlags.NoCompress) === 0;
+    }
+
+    return {
+      message: await this.sendCompression.writeMessage(
+        resolvedMessage.message,
+        compress
+      ),
+      flags: resolvedMessage.flags,
+    };
+  }
+
+  async receiveMessage(message: Promise<Buffer>) {
+    /* 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);
+  }
+}
+
+export class CompressionFilterFactory
+  implements FilterFactory<CompressionFilter>
+{
+  private sharedFilterConfig: SharedCompressionFilterConfig = {};
+  constructor(channel: Channel, private readonly options: ChannelOptions) {}
+  createFilter(): CompressionFilter {
+    return new CompressionFilter(this.options, this.sharedFilterConfig);
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/connectivity-state.ts

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2021 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.
+ *
+ */
+
+export enum ConnectivityState {
+  IDLE,
+  CONNECTING,
+  READY,
+  TRANSIENT_FAILURE,
+  SHUTDOWN,
+}

travel-backend/node_modules/@grpc/grpc-js/src/constants.ts

@@ -0,0 +1,66 @@
+/*
+ * 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.
+ *
+ */
+
+export enum Status {
+  OK = 0,
+  CANCELLED,
+  UNKNOWN,
+  INVALID_ARGUMENT,
+  DEADLINE_EXCEEDED,
+  NOT_FOUND,
+  ALREADY_EXISTS,
+  PERMISSION_DENIED,
+  RESOURCE_EXHAUSTED,
+  FAILED_PRECONDITION,
+  ABORTED,
+  OUT_OF_RANGE,
+  UNIMPLEMENTED,
+  INTERNAL,
+  UNAVAILABLE,
+  DATA_LOSS,
+  UNAUTHENTICATED,
+}
+
+export enum LogVerbosity {
+  DEBUG = 0,
+  INFO,
+  ERROR,
+  NONE,
+}
+
+/**
+ * NOTE: This enum is not currently used in any implemented API in this
+ * library. It is included only for type parity with the other implementation.
+ */
+export enum Propagate {
+  DEADLINE = 1,
+  CENSUS_STATS_CONTEXT = 2,
+  CENSUS_TRACING_CONTEXT = 4,
+  CANCELLATION = 8,
+  // https://github.com/grpc/grpc/blob/master/include/grpc/impl/codegen/propagation_bits.h#L43
+  DEFAULTS = 0xffff |
+    Propagate.DEADLINE |
+    Propagate.CENSUS_STATS_CONTEXT |
+    Propagate.CENSUS_TRACING_CONTEXT |
+    Propagate.CANCELLATION,
+}
+
+// -1 means unlimited
+export const DEFAULT_MAX_SEND_MESSAGE_LENGTH = -1;
+
+// 4 MB default
+export const DEFAULT_MAX_RECEIVE_MESSAGE_LENGTH = 4 * 1024 * 1024;

travel-backend/node_modules/@grpc/grpc-js/src/control-plane-status.ts

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2022 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.
+ *
+ */
+
+import { Status } from './constants';
+
+const INAPPROPRIATE_CONTROL_PLANE_CODES: Status[] = [
+  Status.OK,
+  Status.INVALID_ARGUMENT,
+  Status.NOT_FOUND,
+  Status.ALREADY_EXISTS,
+  Status.FAILED_PRECONDITION,
+  Status.ABORTED,
+  Status.OUT_OF_RANGE,
+  Status.DATA_LOSS,
+];
+
+export function restrictControlPlaneStatusCode(
+  code: Status,
+  details: string
+): { code: Status; details: string } {
+  if (INAPPROPRIATE_CONTROL_PLANE_CODES.includes(code)) {
+    return {
+      code: Status.INTERNAL,
+      details: `Invalid status from control plane: ${code} ${Status[code]} ${details}`,
+    };
+  } else {
+    return { code, details };
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/deadline.ts

@@ -0,0 +1,95 @@
+/*
+ * 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.
+ *
+ */
+
+export type Deadline = Date | number;
+
+export function minDeadline(...deadlineList: Deadline[]): Deadline {
+  let minValue = Infinity;
+  for (const deadline of deadlineList) {
+    const deadlineMsecs =
+      deadline instanceof Date ? deadline.getTime() : deadline;
+    if (deadlineMsecs < minValue) {
+      minValue = deadlineMsecs;
+    }
+  }
+  return minValue;
+}
+
+const units: Array<[string, number]> = [
+  ['m', 1],
+  ['S', 1000],
+  ['M', 60 * 1000],
+  ['H', 60 * 60 * 1000],
+];
+
+export function getDeadlineTimeoutString(deadline: Deadline) {
+  const now = new Date().getTime();
+  if (deadline instanceof Date) {
+    deadline = deadline.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');
+}
+
+/**
+ * See https://nodejs.org/api/timers.html#settimeoutcallback-delay-args
+ * In particular, "When delay is larger than 2147483647 or less than 1, the
+ * delay will be set to 1. Non-integer delays are truncated to an integer."
+ * This number of milliseconds is almost 25 days.
+ */
+const MAX_TIMEOUT_TIME = 2147483647;
+
+/**
+ * Get the timeout value that should be passed to setTimeout now for the timer
+ * to end at the deadline. For any deadline before now, the timer should end
+ * immediately, represented by a value of 0. For any deadline more than
+ * MAX_TIMEOUT_TIME milliseconds in the future, a timer cannot be set that will
+ * end at that time, so it is treated as infinitely far in the future.
+ * @param deadline
+ * @returns
+ */
+export function getRelativeTimeout(deadline: Deadline) {
+  const deadlineMs = deadline instanceof Date ? deadline.getTime() : deadline;
+  const now = new Date().getTime();
+  const timeout = deadlineMs - now;
+  if (timeout < 0) {
+    return 0;
+  } else if (timeout > MAX_TIMEOUT_TIME) {
+    return Infinity;
+  } else {
+    return timeout;
+  }
+}
+
+export function deadlineToString(deadline: Deadline): string {
+  if (deadline instanceof Date) {
+    return deadline.toISOString();
+  } else {
+    const dateDeadline = new Date(deadline);
+    if (Number.isNaN(dateDeadline.getTime())) {
+      return '' + deadline;
+    } else {
+      return dateDeadline.toISOString();
+    }
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/duration.ts

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2022 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.
+ *
+ */
+
+export interface Duration {
+  seconds: number;
+  nanos: number;
+}
+
+export function msToDuration(millis: number): Duration {
+  return {
+    seconds: (millis / 1000) | 0,
+    nanos: ((millis % 1000) * 1_000_000) | 0,
+  };
+}
+
+export function durationToMs(duration: Duration): number {
+  return (duration.seconds * 1000 + duration.nanos / 1_000_000) | 0;
+}
+
+export function isDuration(value: any): value is Duration {
+  return typeof value.seconds === 'number' && typeof value.nanos === 'number';
+}

travel-backend/node_modules/@grpc/grpc-js/src/error.ts

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2022 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.
+ *
+ */
+
+export function getErrorMessage(error: unknown): string {
+  if (error instanceof Error) {
+    return error.message;
+  } else {
+    return String(error);
+  }
+}
+
+export function getErrorCode(error: unknown): number | null {
+  if (
+    typeof error === 'object' &&
+    error !== null &&
+    'code' in error &&
+    typeof (error as Record<string, unknown>).code === 'number'
+  ) {
+    return (error as Record<string, number>).code;
+  } else {
+    return null;
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/events.ts

@@ -0,0 +1,26 @@
+/*
+ * 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.
+ *
+ */
+
+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;
+}

travel-backend/node_modules/@grpc/grpc-js/src/experimental.ts

@@ -0,0 +1,48 @@
+export { trace, log } from './logging';
+export {
+  Resolver,
+  ResolverListener,
+  registerResolver,
+  ConfigSelector,
+  createResolver,
+} from './resolver';
+export { GrpcUri, uriToString } from './uri-parser';
+export { Duration, durationToMs } from './duration';
+export { ServiceConfig, MethodConfig, RetryPolicy } from './service-config';
+export { BackoffTimeout } from './backoff-timeout';
+export {
+  LoadBalancer,
+  LoadBalancingConfig,
+  ChannelControlHelper,
+  createChildChannelControlHelper,
+  registerLoadBalancerType,
+  getFirstUsableConfig,
+  validateLoadBalancingConfig,
+} from './load-balancer';
+export {
+  SubchannelAddress,
+  subchannelAddressToString,
+} from './subchannel-address';
+export { ChildLoadBalancerHandler } from './load-balancer-child-handler';
+export {
+  Picker,
+  UnavailablePicker,
+  QueuePicker,
+  PickResult,
+  PickArgs,
+  PickResultType,
+} from './picker';
+export { Call as CallStream } from './call-interface';
+export { Filter, BaseFilter, FilterFactory } from './filter';
+export { FilterStackFactory } from './filter-stack';
+export { registerAdminService } from './admin';
+export {
+  SubchannelInterface,
+  BaseSubchannelWrapper,
+  ConnectivityStateListener,
+} from './subchannel-interface';
+export {
+  OutlierDetectionLoadBalancingConfig,
+  SuccessRateEjectionConfig,
+  FailurePercentageEjectionConfig,
+} from './load-balancer-outlier-detection';

travel-backend/node_modules/@grpc/grpc-js/src/filter-stack.ts

@@ -0,0 +1,100 @@
+/*
+ * 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.
+ *
+ */
+
+import { StatusObject, WriteObject } from './call-interface';
+import { Filter, FilterFactory } from './filter';
+import { Metadata } from './metadata';
+
+export class FilterStack implements Filter {
+  constructor(private readonly filters: Filter[]) {}
+
+  sendMetadata(metadata: Promise<Metadata>): Promise<Metadata> {
+    let result: Promise<Metadata> = metadata;
+
+    for (let i = 0; i < this.filters.length; i++) {
+      result = this.filters[i].sendMetadata(result);
+    }
+
+    return result;
+  }
+
+  receiveMetadata(metadata: Metadata) {
+    let result: Metadata = metadata;
+
+    for (let i = this.filters.length - 1; i >= 0; i--) {
+      result = this.filters[i].receiveMetadata(result);
+    }
+
+    return result;
+  }
+
+  sendMessage(message: Promise<WriteObject>): Promise<WriteObject> {
+    let result: Promise<WriteObject> = message;
+
+    for (let i = 0; i < this.filters.length; i++) {
+      result = this.filters[i].sendMessage(result);
+    }
+
+    return result;
+  }
+
+  receiveMessage(message: Promise<Buffer>): Promise<Buffer> {
+    let result: Promise<Buffer> = message;
+
+    for (let i = this.filters.length - 1; i >= 0; i--) {
+      result = this.filters[i].receiveMessage(result);
+    }
+
+    return result;
+  }
+
+  receiveTrailers(status: StatusObject): StatusObject {
+    let result: StatusObject = status;
+
+    for (let i = this.filters.length - 1; i >= 0; i--) {
+      result = this.filters[i].receiveTrailers(result);
+    }
+
+    return result;
+  }
+
+  push(filters: Filter[]) {
+    this.filters.unshift(...filters);
+  }
+
+  getFilters(): Filter[] {
+    return this.filters;
+  }
+}
+
+export class FilterStackFactory implements FilterFactory<FilterStack> {
+  constructor(private readonly factories: Array<FilterFactory<Filter>>) {}
+
+  push(filterFactories: FilterFactory<Filter>[]) {
+    this.factories.unshift(...filterFactories);
+  }
+
+  clone(): FilterStackFactory {
+    return new FilterStackFactory([...this.factories]);
+  }
+
+  createFilter(): FilterStack {
+    return new FilterStack(
+      this.factories.map(factory => factory.createFilter())
+    );
+  }
+}

travel-backend/node_modules/@grpc/grpc-js/src/filter.ts

@@ -0,0 +1,63 @@
+/*
+ * 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.
+ *
+ */
+
+import { StatusObject, WriteObject } from './call-interface';
+import { Metadata } from './metadata';
+
+/**
+ * Filter classes represent related per-call logic and state that is primarily
+ * used to modify incoming and outgoing data. All async filters can be
+ * rejected. The rejection error must be a StatusObject, and a rejection will
+ * cause the call to end with that status.
+ */
+export interface Filter {
+  sendMetadata(metadata: Promise<Metadata>): Promise<Metadata>;
+
+  receiveMetadata(metadata: Metadata): Metadata;
+
+  sendMessage(message: Promise<WriteObject>): Promise<WriteObject>;
+
+  receiveMessage(message: Promise<Buffer>): Promise<Buffer>;
+
+  receiveTrailers(status: StatusObject): StatusObject;
+}
+
+export abstract class BaseFilter implements Filter {
+  async sendMetadata(metadata: Promise<Metadata>): Promise<Metadata> {
+    return metadata;
+  }
+
+  receiveMetadata(metadata: Metadata): Metadata {
+    return metadata;
+  }
+
+  async sendMessage(message: Promise<WriteObject>): Promise<WriteObject> {
+    return message;
+  }
+
+  async receiveMessage(message: Promise<Buffer>): Promise<Buffer> {
+    return message;
+  }
+
+  receiveTrailers(status: StatusObject): StatusObject {
+    return status;
+  }
+}
+
+export interface FilterFactory<T extends Filter> {
+  createFilter(): T;
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/channelz.ts

@@ -0,0 +1,73 @@
+import type * as grpc from '../index';
+import type { MessageTypeDefinition } from '@grpc/proto-loader';
+
+import type { ChannelzClient as _grpc_channelz_v1_ChannelzClient, ChannelzDefinition as _grpc_channelz_v1_ChannelzDefinition } from './grpc/channelz/v1/Channelz';
+
+type SubtypeConstructor<Constructor extends new (...args: any) => any, Subtype> = {
+  new(...args: ConstructorParameters<Constructor>): Subtype;
+};
+
+export interface ProtoGrpcType {
+  google: {
+    protobuf: {
+      Any: MessageTypeDefinition
+      BoolValue: MessageTypeDefinition
+      BytesValue: MessageTypeDefinition
+      DoubleValue: MessageTypeDefinition
+      Duration: MessageTypeDefinition
+      FloatValue: MessageTypeDefinition
+      Int32Value: MessageTypeDefinition
+      Int64Value: MessageTypeDefinition
+      StringValue: MessageTypeDefinition
+      Timestamp: MessageTypeDefinition
+      UInt32Value: MessageTypeDefinition
+      UInt64Value: MessageTypeDefinition
+    }
+  }
+  grpc: {
+    channelz: {
+      v1: {
+        Address: MessageTypeDefinition
+        Channel: MessageTypeDefinition
+        ChannelConnectivityState: MessageTypeDefinition
+        ChannelData: MessageTypeDefinition
+        ChannelRef: MessageTypeDefinition
+        ChannelTrace: MessageTypeDefinition
+        ChannelTraceEvent: MessageTypeDefinition
+        /**
+         * Channelz is a service exposed by gRPC servers that provides detailed debug
+         * information.
+         */
+        Channelz: SubtypeConstructor<typeof grpc.Client, _grpc_channelz_v1_ChannelzClient> & { service: _grpc_channelz_v1_ChannelzDefinition }
+        GetChannelRequest: MessageTypeDefinition
+        GetChannelResponse: MessageTypeDefinition
+        GetServerRequest: MessageTypeDefinition
+        GetServerResponse: MessageTypeDefinition
+        GetServerSocketsRequest: MessageTypeDefinition
+        GetServerSocketsResponse: MessageTypeDefinition
+        GetServersRequest: MessageTypeDefinition
+        GetServersResponse: MessageTypeDefinition
+        GetSocketRequest: MessageTypeDefinition
+        GetSocketResponse: MessageTypeDefinition
+        GetSubchannelRequest: MessageTypeDefinition
+        GetSubchannelResponse: MessageTypeDefinition
+        GetTopChannelsRequest: MessageTypeDefinition
+        GetTopChannelsResponse: MessageTypeDefinition
+        Security: MessageTypeDefinition
+        Server: MessageTypeDefinition
+        ServerData: MessageTypeDefinition
+        ServerRef: MessageTypeDefinition
+        Socket: MessageTypeDefinition
+        SocketData: MessageTypeDefinition
+        SocketOption: MessageTypeDefinition
+        SocketOptionLinger: MessageTypeDefinition
+        SocketOptionTcpInfo: MessageTypeDefinition
+        SocketOptionTimeout: MessageTypeDefinition
+        SocketRef: MessageTypeDefinition
+        Subchannel: MessageTypeDefinition
+        SubchannelRef: MessageTypeDefinition
+      }
+    }
+  }
+}
+

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/Any.ts

@@ -0,0 +1,13 @@
+// Original file: null
+
+import type { AnyExtension } from '@grpc/proto-loader';
+
+export type Any = AnyExtension | {
+  type_url: string;
+  value: Buffer | Uint8Array | string;
+}
+
+export interface Any__Output {
+  'type_url': (string);
+  'value': (Buffer);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/BoolValue.ts

@@ -0,0 +1,10 @@
+// Original file: null
+
+
+export interface BoolValue {
+  'value'?: (boolean);
+}
+
+export interface BoolValue__Output {
+  'value': (boolean);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/BytesValue.ts

@@ -0,0 +1,10 @@
+// Original file: null
+
+
+export interface BytesValue {
+  'value'?: (Buffer | Uint8Array | string);
+}
+
+export interface BytesValue__Output {
+  'value': (Buffer);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/DoubleValue.ts

@@ -0,0 +1,10 @@
+// Original file: null
+
+
+export interface DoubleValue {
+  'value'?: (number | string);
+}
+
+export interface DoubleValue__Output {
+  'value': (number);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/Duration.ts

@@ -0,0 +1,13 @@
+// Original file: null
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface Duration {
+  'seconds'?: (number | string | Long);
+  'nanos'?: (number);
+}
+
+export interface Duration__Output {
+  'seconds': (string);
+  'nanos': (number);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/FloatValue.ts

@@ -0,0 +1,10 @@
+// Original file: null
+
+
+export interface FloatValue {
+  'value'?: (number | string);
+}
+
+export interface FloatValue__Output {
+  'value': (number);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/Int32Value.ts

@@ -0,0 +1,10 @@
+// Original file: null
+
+
+export interface Int32Value {
+  'value'?: (number);
+}
+
+export interface Int32Value__Output {
+  'value': (number);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/Int64Value.ts

@@ -0,0 +1,11 @@
+// Original file: null
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface Int64Value {
+  'value'?: (number | string | Long);
+}
+
+export interface Int64Value__Output {
+  'value': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/StringValue.ts

@@ -0,0 +1,10 @@
+// Original file: null
+
+
+export interface StringValue {
+  'value'?: (string);
+}
+
+export interface StringValue__Output {
+  'value': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/Timestamp.ts

@@ -0,0 +1,13 @@
+// Original file: null
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface Timestamp {
+  'seconds'?: (number | string | Long);
+  'nanos'?: (number);
+}
+
+export interface Timestamp__Output {
+  'seconds': (string);
+  'nanos': (number);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/UInt32Value.ts

@@ -0,0 +1,10 @@
+// Original file: null
+
+
+export interface UInt32Value {
+  'value'?: (number);
+}
+
+export interface UInt32Value__Output {
+  'value': (number);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/google/protobuf/UInt64Value.ts

@@ -0,0 +1,11 @@
+// Original file: null
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface UInt64Value {
+  'value'?: (number | string | Long);
+}
+
+export interface UInt64Value__Output {
+  'value': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/Address.ts

@@ -0,0 +1,89 @@
+// Original file: proto/channelz.proto
+
+import type { Any as _google_protobuf_Any, Any__Output as _google_protobuf_Any__Output } from '../../../google/protobuf/Any';
+
+/**
+ * An address type not included above.
+ */
+export interface _grpc_channelz_v1_Address_OtherAddress {
+  /**
+   * The human readable version of the value.  This value should be set.
+   */
+  'name'?: (string);
+  /**
+   * The actual address message.
+   */
+  'value'?: (_google_protobuf_Any | null);
+}
+
+/**
+ * An address type not included above.
+ */
+export interface _grpc_channelz_v1_Address_OtherAddress__Output {
+  /**
+   * The human readable version of the value.  This value should be set.
+   */
+  'name': (string);
+  /**
+   * The actual address message.
+   */
+  'value': (_google_protobuf_Any__Output | null);
+}
+
+export interface _grpc_channelz_v1_Address_TcpIpAddress {
+  /**
+   * Either the IPv4 or IPv6 address in bytes.  Will be either 4 bytes or 16
+   * bytes in length.
+   */
+  'ip_address'?: (Buffer | Uint8Array | string);
+  /**
+   * 0-64k, or -1 if not appropriate.
+   */
+  'port'?: (number);
+}
+
+export interface _grpc_channelz_v1_Address_TcpIpAddress__Output {
+  /**
+   * Either the IPv4 or IPv6 address in bytes.  Will be either 4 bytes or 16
+   * bytes in length.
+   */
+  'ip_address': (Buffer);
+  /**
+   * 0-64k, or -1 if not appropriate.
+   */
+  'port': (number);
+}
+
+/**
+ * A Unix Domain Socket address.
+ */
+export interface _grpc_channelz_v1_Address_UdsAddress {
+  'filename'?: (string);
+}
+
+/**
+ * A Unix Domain Socket address.
+ */
+export interface _grpc_channelz_v1_Address_UdsAddress__Output {
+  'filename': (string);
+}
+
+/**
+ * Address represents the address used to create the socket.
+ */
+export interface Address {
+  'tcpip_address'?: (_grpc_channelz_v1_Address_TcpIpAddress | null);
+  'uds_address'?: (_grpc_channelz_v1_Address_UdsAddress | null);
+  'other_address'?: (_grpc_channelz_v1_Address_OtherAddress | null);
+  'address'?: "tcpip_address"|"uds_address"|"other_address";
+}
+
+/**
+ * Address represents the address used to create the socket.
+ */
+export interface Address__Output {
+  'tcpip_address'?: (_grpc_channelz_v1_Address_TcpIpAddress__Output | null);
+  'uds_address'?: (_grpc_channelz_v1_Address_UdsAddress__Output | null);
+  'other_address'?: (_grpc_channelz_v1_Address_OtherAddress__Output | null);
+  'address': "tcpip_address"|"uds_address"|"other_address";
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/Channel.ts

@@ -0,0 +1,68 @@
+// Original file: proto/channelz.proto
+
+import type { ChannelRef as _grpc_channelz_v1_ChannelRef, ChannelRef__Output as _grpc_channelz_v1_ChannelRef__Output } from '../../../grpc/channelz/v1/ChannelRef';
+import type { ChannelData as _grpc_channelz_v1_ChannelData, ChannelData__Output as _grpc_channelz_v1_ChannelData__Output } from '../../../grpc/channelz/v1/ChannelData';
+import type { SubchannelRef as _grpc_channelz_v1_SubchannelRef, SubchannelRef__Output as _grpc_channelz_v1_SubchannelRef__Output } from '../../../grpc/channelz/v1/SubchannelRef';
+import type { SocketRef as _grpc_channelz_v1_SocketRef, SocketRef__Output as _grpc_channelz_v1_SocketRef__Output } from '../../../grpc/channelz/v1/SocketRef';
+
+/**
+ * Channel is a logical grouping of channels, subchannels, and sockets.
+ */
+export interface Channel {
+  /**
+   * The identifier for this channel. This should bet set.
+   */
+  'ref'?: (_grpc_channelz_v1_ChannelRef | null);
+  /**
+   * Data specific to this channel.
+   */
+  'data'?: (_grpc_channelz_v1_ChannelData | null);
+  /**
+   * There are no ordering guarantees on the order of channel refs.
+   * There may not be cycles in the ref graph.
+   * A channel ref may be present in more than one channel or subchannel.
+   */
+  'channel_ref'?: (_grpc_channelz_v1_ChannelRef)[];
+  /**
+   * At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+   * There are no ordering guarantees on the order of subchannel refs.
+   * There may not be cycles in the ref graph.
+   * A sub channel ref may be present in more than one channel or subchannel.
+   */
+  'subchannel_ref'?: (_grpc_channelz_v1_SubchannelRef)[];
+  /**
+   * There are no ordering guarantees on the order of sockets.
+   */
+  'socket_ref'?: (_grpc_channelz_v1_SocketRef)[];
+}
+
+/**
+ * Channel is a logical grouping of channels, subchannels, and sockets.
+ */
+export interface Channel__Output {
+  /**
+   * The identifier for this channel. This should bet set.
+   */
+  'ref': (_grpc_channelz_v1_ChannelRef__Output | null);
+  /**
+   * Data specific to this channel.
+   */
+  'data': (_grpc_channelz_v1_ChannelData__Output | null);
+  /**
+   * There are no ordering guarantees on the order of channel refs.
+   * There may not be cycles in the ref graph.
+   * A channel ref may be present in more than one channel or subchannel.
+   */
+  'channel_ref': (_grpc_channelz_v1_ChannelRef__Output)[];
+  /**
+   * At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+   * There are no ordering guarantees on the order of subchannel refs.
+   * There may not be cycles in the ref graph.
+   * A sub channel ref may be present in more than one channel or subchannel.
+   */
+  'subchannel_ref': (_grpc_channelz_v1_SubchannelRef__Output)[];
+  /**
+   * There are no ordering guarantees on the order of sockets.
+   */
+  'socket_ref': (_grpc_channelz_v1_SocketRef__Output)[];
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/ChannelConnectivityState.ts

@@ -0,0 +1,45 @@
+// Original file: proto/channelz.proto
+
+
+// Original file: proto/channelz.proto
+
+export const _grpc_channelz_v1_ChannelConnectivityState_State = {
+  UNKNOWN: 'UNKNOWN',
+  IDLE: 'IDLE',
+  CONNECTING: 'CONNECTING',
+  READY: 'READY',
+  TRANSIENT_FAILURE: 'TRANSIENT_FAILURE',
+  SHUTDOWN: 'SHUTDOWN',
+} as const;
+
+export type _grpc_channelz_v1_ChannelConnectivityState_State =
+  | 'UNKNOWN'
+  | 0
+  | 'IDLE'
+  | 1
+  | 'CONNECTING'
+  | 2
+  | 'READY'
+  | 3
+  | 'TRANSIENT_FAILURE'
+  | 4
+  | 'SHUTDOWN'
+  | 5
+
+export type _grpc_channelz_v1_ChannelConnectivityState_State__Output = typeof _grpc_channelz_v1_ChannelConnectivityState_State[keyof typeof _grpc_channelz_v1_ChannelConnectivityState_State]
+
+/**
+ * These come from the specified states in this document:
+ * https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md
+ */
+export interface ChannelConnectivityState {
+  'state'?: (_grpc_channelz_v1_ChannelConnectivityState_State);
+}
+
+/**
+ * These come from the specified states in this document:
+ * https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md
+ */
+export interface ChannelConnectivityState__Output {
+  'state': (_grpc_channelz_v1_ChannelConnectivityState_State__Output);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/ChannelData.ts

@@ -0,0 +1,76 @@
+// Original file: proto/channelz.proto
+
+import type { ChannelConnectivityState as _grpc_channelz_v1_ChannelConnectivityState, ChannelConnectivityState__Output as _grpc_channelz_v1_ChannelConnectivityState__Output } from '../../../grpc/channelz/v1/ChannelConnectivityState';
+import type { ChannelTrace as _grpc_channelz_v1_ChannelTrace, ChannelTrace__Output as _grpc_channelz_v1_ChannelTrace__Output } from '../../../grpc/channelz/v1/ChannelTrace';
+import type { Timestamp as _google_protobuf_Timestamp, Timestamp__Output as _google_protobuf_Timestamp__Output } from '../../../google/protobuf/Timestamp';
+import type { Long } from '@grpc/proto-loader';
+
+/**
+ * Channel data is data related to a specific Channel or Subchannel.
+ */
+export interface ChannelData {
+  /**
+   * The connectivity state of the channel or subchannel.  Implementations
+   * should always set this.
+   */
+  'state'?: (_grpc_channelz_v1_ChannelConnectivityState | null);
+  /**
+   * The target this channel originally tried to connect to.  May be absent
+   */
+  'target'?: (string);
+  /**
+   * A trace of recent events on the channel.  May be absent.
+   */
+  'trace'?: (_grpc_channelz_v1_ChannelTrace | null);
+  /**
+   * The number of calls started on the channel
+   */
+  'calls_started'?: (number | string | Long);
+  /**
+   * The number of calls that have completed with an OK status
+   */
+  'calls_succeeded'?: (number | string | Long);
+  /**
+   * The number of calls that have completed with a non-OK status
+   */
+  'calls_failed'?: (number | string | Long);
+  /**
+   * The last time a call was started on the channel.
+   */
+  'last_call_started_timestamp'?: (_google_protobuf_Timestamp | null);
+}
+
+/**
+ * Channel data is data related to a specific Channel or Subchannel.
+ */
+export interface ChannelData__Output {
+  /**
+   * The connectivity state of the channel or subchannel.  Implementations
+   * should always set this.
+   */
+  'state': (_grpc_channelz_v1_ChannelConnectivityState__Output | null);
+  /**
+   * The target this channel originally tried to connect to.  May be absent
+   */
+  'target': (string);
+  /**
+   * A trace of recent events on the channel.  May be absent.
+   */
+  'trace': (_grpc_channelz_v1_ChannelTrace__Output | null);
+  /**
+   * The number of calls started on the channel
+   */
+  'calls_started': (string);
+  /**
+   * The number of calls that have completed with an OK status
+   */
+  'calls_succeeded': (string);
+  /**
+   * The number of calls that have completed with a non-OK status
+   */
+  'calls_failed': (string);
+  /**
+   * The last time a call was started on the channel.
+   */
+  'last_call_started_timestamp': (_google_protobuf_Timestamp__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/ChannelRef.ts

@@ -0,0 +1,31 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+/**
+ * ChannelRef is a reference to a Channel.
+ */
+export interface ChannelRef {
+  /**
+   * The globally unique id for this channel.  Must be a positive number.
+   */
+  'channel_id'?: (number | string | Long);
+  /**
+   * An optional name associated with the channel.
+   */
+  'name'?: (string);
+}
+
+/**
+ * ChannelRef is a reference to a Channel.
+ */
+export interface ChannelRef__Output {
+  /**
+   * The globally unique id for this channel.  Must be a positive number.
+   */
+  'channel_id': (string);
+  /**
+   * An optional name associated with the channel.
+   */
+  'name': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/ChannelTrace.ts

@@ -0,0 +1,45 @@
+// Original file: proto/channelz.proto
+
+import type { Timestamp as _google_protobuf_Timestamp, Timestamp__Output as _google_protobuf_Timestamp__Output } from '../../../google/protobuf/Timestamp';
+import type { ChannelTraceEvent as _grpc_channelz_v1_ChannelTraceEvent, ChannelTraceEvent__Output as _grpc_channelz_v1_ChannelTraceEvent__Output } from '../../../grpc/channelz/v1/ChannelTraceEvent';
+import type { Long } from '@grpc/proto-loader';
+
+/**
+ * ChannelTrace represents the recent events that have occurred on the channel.
+ */
+export interface ChannelTrace {
+  /**
+   * Number of events ever logged in this tracing object. This can differ from
+   * events.size() because events can be overwritten or garbage collected by
+   * implementations.
+   */
+  'num_events_logged'?: (number | string | Long);
+  /**
+   * Time that this channel was created.
+   */
+  'creation_timestamp'?: (_google_protobuf_Timestamp | null);
+  /**
+   * List of events that have occurred on this channel.
+   */
+  'events'?: (_grpc_channelz_v1_ChannelTraceEvent)[];
+}
+
+/**
+ * ChannelTrace represents the recent events that have occurred on the channel.
+ */
+export interface ChannelTrace__Output {
+  /**
+   * Number of events ever logged in this tracing object. This can differ from
+   * events.size() because events can be overwritten or garbage collected by
+   * implementations.
+   */
+  'num_events_logged': (string);
+  /**
+   * Time that this channel was created.
+   */
+  'creation_timestamp': (_google_protobuf_Timestamp__Output | null);
+  /**
+   * List of events that have occurred on this channel.
+   */
+  'events': (_grpc_channelz_v1_ChannelTraceEvent__Output)[];
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/ChannelTraceEvent.ts

@@ -0,0 +1,91 @@
+// Original file: proto/channelz.proto
+
+import type { Timestamp as _google_protobuf_Timestamp, Timestamp__Output as _google_protobuf_Timestamp__Output } from '../../../google/protobuf/Timestamp';
+import type { ChannelRef as _grpc_channelz_v1_ChannelRef, ChannelRef__Output as _grpc_channelz_v1_ChannelRef__Output } from '../../../grpc/channelz/v1/ChannelRef';
+import type { SubchannelRef as _grpc_channelz_v1_SubchannelRef, SubchannelRef__Output as _grpc_channelz_v1_SubchannelRef__Output } from '../../../grpc/channelz/v1/SubchannelRef';
+
+// Original file: proto/channelz.proto
+
+/**
+ * The supported severity levels of trace events.
+ */
+export const _grpc_channelz_v1_ChannelTraceEvent_Severity = {
+  CT_UNKNOWN: 'CT_UNKNOWN',
+  CT_INFO: 'CT_INFO',
+  CT_WARNING: 'CT_WARNING',
+  CT_ERROR: 'CT_ERROR',
+} as const;
+
+/**
+ * The supported severity levels of trace events.
+ */
+export type _grpc_channelz_v1_ChannelTraceEvent_Severity =
+  | 'CT_UNKNOWN'
+  | 0
+  | 'CT_INFO'
+  | 1
+  | 'CT_WARNING'
+  | 2
+  | 'CT_ERROR'
+  | 3
+
+/**
+ * The supported severity levels of trace events.
+ */
+export type _grpc_channelz_v1_ChannelTraceEvent_Severity__Output = typeof _grpc_channelz_v1_ChannelTraceEvent_Severity[keyof typeof _grpc_channelz_v1_ChannelTraceEvent_Severity]
+
+/**
+ * A trace event is an interesting thing that happened to a channel or
+ * subchannel, such as creation, address resolution, subchannel creation, etc.
+ */
+export interface ChannelTraceEvent {
+  /**
+   * High level description of the event.
+   */
+  'description'?: (string);
+  /**
+   * the severity of the trace event
+   */
+  'severity'?: (_grpc_channelz_v1_ChannelTraceEvent_Severity);
+  /**
+   * When this event occurred.
+   */
+  'timestamp'?: (_google_protobuf_Timestamp | null);
+  'channel_ref'?: (_grpc_channelz_v1_ChannelRef | null);
+  'subchannel_ref'?: (_grpc_channelz_v1_SubchannelRef | null);
+  /**
+   * ref of referenced channel or subchannel.
+   * Optional, only present if this event refers to a child object. For example,
+   * this field would be filled if this trace event was for a subchannel being
+   * created.
+   */
+  'child_ref'?: "channel_ref"|"subchannel_ref";
+}
+
+/**
+ * A trace event is an interesting thing that happened to a channel or
+ * subchannel, such as creation, address resolution, subchannel creation, etc.
+ */
+export interface ChannelTraceEvent__Output {
+  /**
+   * High level description of the event.
+   */
+  'description': (string);
+  /**
+   * the severity of the trace event
+   */
+  'severity': (_grpc_channelz_v1_ChannelTraceEvent_Severity__Output);
+  /**
+   * When this event occurred.
+   */
+  'timestamp': (_google_protobuf_Timestamp__Output | null);
+  'channel_ref'?: (_grpc_channelz_v1_ChannelRef__Output | null);
+  'subchannel_ref'?: (_grpc_channelz_v1_SubchannelRef__Output | null);
+  /**
+   * ref of referenced channel or subchannel.
+   * Optional, only present if this event refers to a child object. For example,
+   * this field would be filled if this trace event was for a subchannel being
+   * created.
+   */
+  'child_ref': "channel_ref"|"subchannel_ref";
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/Channelz.ts

@@ -0,0 +1,178 @@
+// Original file: proto/channelz.proto
+
+import type * as grpc from '../../../../index'
+import type { MethodDefinition } from '@grpc/proto-loader'
+import type { GetChannelRequest as _grpc_channelz_v1_GetChannelRequest, GetChannelRequest__Output as _grpc_channelz_v1_GetChannelRequest__Output } from '../../../grpc/channelz/v1/GetChannelRequest';
+import type { GetChannelResponse as _grpc_channelz_v1_GetChannelResponse, GetChannelResponse__Output as _grpc_channelz_v1_GetChannelResponse__Output } from '../../../grpc/channelz/v1/GetChannelResponse';
+import type { GetServerRequest as _grpc_channelz_v1_GetServerRequest, GetServerRequest__Output as _grpc_channelz_v1_GetServerRequest__Output } from '../../../grpc/channelz/v1/GetServerRequest';
+import type { GetServerResponse as _grpc_channelz_v1_GetServerResponse, GetServerResponse__Output as _grpc_channelz_v1_GetServerResponse__Output } from '../../../grpc/channelz/v1/GetServerResponse';
+import type { GetServerSocketsRequest as _grpc_channelz_v1_GetServerSocketsRequest, GetServerSocketsRequest__Output as _grpc_channelz_v1_GetServerSocketsRequest__Output } from '../../../grpc/channelz/v1/GetServerSocketsRequest';
+import type { GetServerSocketsResponse as _grpc_channelz_v1_GetServerSocketsResponse, GetServerSocketsResponse__Output as _grpc_channelz_v1_GetServerSocketsResponse__Output } from '../../../grpc/channelz/v1/GetServerSocketsResponse';
+import type { GetServersRequest as _grpc_channelz_v1_GetServersRequest, GetServersRequest__Output as _grpc_channelz_v1_GetServersRequest__Output } from '../../../grpc/channelz/v1/GetServersRequest';
+import type { GetServersResponse as _grpc_channelz_v1_GetServersResponse, GetServersResponse__Output as _grpc_channelz_v1_GetServersResponse__Output } from '../../../grpc/channelz/v1/GetServersResponse';
+import type { GetSocketRequest as _grpc_channelz_v1_GetSocketRequest, GetSocketRequest__Output as _grpc_channelz_v1_GetSocketRequest__Output } from '../../../grpc/channelz/v1/GetSocketRequest';
+import type { GetSocketResponse as _grpc_channelz_v1_GetSocketResponse, GetSocketResponse__Output as _grpc_channelz_v1_GetSocketResponse__Output } from '../../../grpc/channelz/v1/GetSocketResponse';
+import type { GetSubchannelRequest as _grpc_channelz_v1_GetSubchannelRequest, GetSubchannelRequest__Output as _grpc_channelz_v1_GetSubchannelRequest__Output } from '../../../grpc/channelz/v1/GetSubchannelRequest';
+import type { GetSubchannelResponse as _grpc_channelz_v1_GetSubchannelResponse, GetSubchannelResponse__Output as _grpc_channelz_v1_GetSubchannelResponse__Output } from '../../../grpc/channelz/v1/GetSubchannelResponse';
+import type { GetTopChannelsRequest as _grpc_channelz_v1_GetTopChannelsRequest, GetTopChannelsRequest__Output as _grpc_channelz_v1_GetTopChannelsRequest__Output } from '../../../grpc/channelz/v1/GetTopChannelsRequest';
+import type { GetTopChannelsResponse as _grpc_channelz_v1_GetTopChannelsResponse, GetTopChannelsResponse__Output as _grpc_channelz_v1_GetTopChannelsResponse__Output } from '../../../grpc/channelz/v1/GetTopChannelsResponse';
+
+/**
+ * Channelz is a service exposed by gRPC servers that provides detailed debug
+ * information.
+ */
+export interface ChannelzClient extends grpc.Client {
+  /**
+   * Returns a single Channel, or else a NOT_FOUND code.
+   */
+  GetChannel(argument: _grpc_channelz_v1_GetChannelRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetChannelResponse__Output>): grpc.ClientUnaryCall;
+  GetChannel(argument: _grpc_channelz_v1_GetChannelRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetChannelResponse__Output>): grpc.ClientUnaryCall;
+  GetChannel(argument: _grpc_channelz_v1_GetChannelRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetChannelResponse__Output>): grpc.ClientUnaryCall;
+  GetChannel(argument: _grpc_channelz_v1_GetChannelRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetChannelResponse__Output>): grpc.ClientUnaryCall;
+  
+  /**
+   * Returns a single Server, or else a NOT_FOUND code.
+   */
+  GetServer(argument: _grpc_channelz_v1_GetServerRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  GetServer(argument: _grpc_channelz_v1_GetServerRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  GetServer(argument: _grpc_channelz_v1_GetServerRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  GetServer(argument: _grpc_channelz_v1_GetServerRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  /**
+   * Returns a single Server, or else a NOT_FOUND code.
+   */
+  getServer(argument: _grpc_channelz_v1_GetServerRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  getServer(argument: _grpc_channelz_v1_GetServerRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  getServer(argument: _grpc_channelz_v1_GetServerRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  getServer(argument: _grpc_channelz_v1_GetServerRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerResponse__Output>): grpc.ClientUnaryCall;
+  
+  /**
+   * Gets all server sockets that exist in the process.
+   */
+  GetServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  GetServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  GetServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  GetServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  /**
+   * Gets all server sockets that exist in the process.
+   */
+  getServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  getServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  getServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  getServerSockets(argument: _grpc_channelz_v1_GetServerSocketsRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetServerSocketsResponse__Output>): grpc.ClientUnaryCall;
+  
+  /**
+   * Gets all servers that exist in the process.
+   */
+  GetServers(argument: _grpc_channelz_v1_GetServersRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  GetServers(argument: _grpc_channelz_v1_GetServersRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  GetServers(argument: _grpc_channelz_v1_GetServersRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  GetServers(argument: _grpc_channelz_v1_GetServersRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  /**
+   * Gets all servers that exist in the process.
+   */
+  getServers(argument: _grpc_channelz_v1_GetServersRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  getServers(argument: _grpc_channelz_v1_GetServersRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  getServers(argument: _grpc_channelz_v1_GetServersRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  getServers(argument: _grpc_channelz_v1_GetServersRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetServersResponse__Output>): grpc.ClientUnaryCall;
+  
+  /**
+   * Returns a single Socket or else a NOT_FOUND code.
+   */
+  GetSocket(argument: _grpc_channelz_v1_GetSocketRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  GetSocket(argument: _grpc_channelz_v1_GetSocketRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  GetSocket(argument: _grpc_channelz_v1_GetSocketRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  GetSocket(argument: _grpc_channelz_v1_GetSocketRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  /**
+   * Returns a single Socket or else a NOT_FOUND code.
+   */
+  getSocket(argument: _grpc_channelz_v1_GetSocketRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  getSocket(argument: _grpc_channelz_v1_GetSocketRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  getSocket(argument: _grpc_channelz_v1_GetSocketRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  getSocket(argument: _grpc_channelz_v1_GetSocketRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetSocketResponse__Output>): grpc.ClientUnaryCall;
+  
+  /**
+   * Returns a single Subchannel, or else a NOT_FOUND code.
+   */
+  GetSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  GetSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  GetSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  GetSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  /**
+   * Returns a single Subchannel, or else a NOT_FOUND code.
+   */
+  getSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  getSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  getSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  getSubchannel(argument: _grpc_channelz_v1_GetSubchannelRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetSubchannelResponse__Output>): grpc.ClientUnaryCall;
+  
+  /**
+   * Gets all root channels (i.e. channels the application has directly
+   * created). This does not include subchannels nor non-top level channels.
+   */
+  GetTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  GetTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  GetTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  GetTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  /**
+   * Gets all root channels (i.e. channels the application has directly
+   * created). This does not include subchannels nor non-top level channels.
+   */
+  getTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, metadata: grpc.Metadata, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  getTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, metadata: grpc.Metadata, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  getTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, options: grpc.CallOptions, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  getTopChannels(argument: _grpc_channelz_v1_GetTopChannelsRequest, callback: grpc.requestCallback<_grpc_channelz_v1_GetTopChannelsResponse__Output>): grpc.ClientUnaryCall;
+  
+}
+
+/**
+ * Channelz is a service exposed by gRPC servers that provides detailed debug
+ * information.
+ */
+export interface ChannelzHandlers extends grpc.UntypedServiceImplementation {
+  /**
+   * Returns a single Channel, or else a NOT_FOUND code.
+   */
+  GetChannel: grpc.handleUnaryCall<_grpc_channelz_v1_GetChannelRequest__Output, _grpc_channelz_v1_GetChannelResponse>;
+  
+  /**
+   * Returns a single Server, or else a NOT_FOUND code.
+   */
+  GetServer: grpc.handleUnaryCall<_grpc_channelz_v1_GetServerRequest__Output, _grpc_channelz_v1_GetServerResponse>;
+  
+  /**
+   * Gets all server sockets that exist in the process.
+   */
+  GetServerSockets: grpc.handleUnaryCall<_grpc_channelz_v1_GetServerSocketsRequest__Output, _grpc_channelz_v1_GetServerSocketsResponse>;
+  
+  /**
+   * Gets all servers that exist in the process.
+   */
+  GetServers: grpc.handleUnaryCall<_grpc_channelz_v1_GetServersRequest__Output, _grpc_channelz_v1_GetServersResponse>;
+  
+  /**
+   * Returns a single Socket or else a NOT_FOUND code.
+   */
+  GetSocket: grpc.handleUnaryCall<_grpc_channelz_v1_GetSocketRequest__Output, _grpc_channelz_v1_GetSocketResponse>;
+  
+  /**
+   * Returns a single Subchannel, or else a NOT_FOUND code.
+   */
+  GetSubchannel: grpc.handleUnaryCall<_grpc_channelz_v1_GetSubchannelRequest__Output, _grpc_channelz_v1_GetSubchannelResponse>;
+  
+  /**
+   * Gets all root channels (i.e. channels the application has directly
+   * created). This does not include subchannels nor non-top level channels.
+   */
+  GetTopChannels: grpc.handleUnaryCall<_grpc_channelz_v1_GetTopChannelsRequest__Output, _grpc_channelz_v1_GetTopChannelsResponse>;
+  
+}
+
+export interface ChannelzDefinition extends grpc.ServiceDefinition {
+  GetChannel: MethodDefinition<_grpc_channelz_v1_GetChannelRequest, _grpc_channelz_v1_GetChannelResponse, _grpc_channelz_v1_GetChannelRequest__Output, _grpc_channelz_v1_GetChannelResponse__Output>
+  GetServer: MethodDefinition<_grpc_channelz_v1_GetServerRequest, _grpc_channelz_v1_GetServerResponse, _grpc_channelz_v1_GetServerRequest__Output, _grpc_channelz_v1_GetServerResponse__Output>
+  GetServerSockets: MethodDefinition<_grpc_channelz_v1_GetServerSocketsRequest, _grpc_channelz_v1_GetServerSocketsResponse, _grpc_channelz_v1_GetServerSocketsRequest__Output, _grpc_channelz_v1_GetServerSocketsResponse__Output>
+  GetServers: MethodDefinition<_grpc_channelz_v1_GetServersRequest, _grpc_channelz_v1_GetServersResponse, _grpc_channelz_v1_GetServersRequest__Output, _grpc_channelz_v1_GetServersResponse__Output>
+  GetSocket: MethodDefinition<_grpc_channelz_v1_GetSocketRequest, _grpc_channelz_v1_GetSocketResponse, _grpc_channelz_v1_GetSocketRequest__Output, _grpc_channelz_v1_GetSocketResponse__Output>
+  GetSubchannel: MethodDefinition<_grpc_channelz_v1_GetSubchannelRequest, _grpc_channelz_v1_GetSubchannelResponse, _grpc_channelz_v1_GetSubchannelRequest__Output, _grpc_channelz_v1_GetSubchannelResponse__Output>
+  GetTopChannels: MethodDefinition<_grpc_channelz_v1_GetTopChannelsRequest, _grpc_channelz_v1_GetTopChannelsResponse, _grpc_channelz_v1_GetTopChannelsRequest__Output, _grpc_channelz_v1_GetTopChannelsResponse__Output>
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetChannelRequest.ts

@@ -0,0 +1,17 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface GetChannelRequest {
+  /**
+   * channel_id is the identifier of the specific channel to get.
+   */
+  'channel_id'?: (number | string | Long);
+}
+
+export interface GetChannelRequest__Output {
+  /**
+   * channel_id is the identifier of the specific channel to get.
+   */
+  'channel_id': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetChannelResponse.ts

@@ -0,0 +1,19 @@
+// Original file: proto/channelz.proto
+
+import type { Channel as _grpc_channelz_v1_Channel, Channel__Output as _grpc_channelz_v1_Channel__Output } from '../../../grpc/channelz/v1/Channel';
+
+export interface GetChannelResponse {
+  /**
+   * The Channel that corresponds to the requested channel_id.  This field
+   * should be set.
+   */
+  'channel'?: (_grpc_channelz_v1_Channel | null);
+}
+
+export interface GetChannelResponse__Output {
+  /**
+   * The Channel that corresponds to the requested channel_id.  This field
+   * should be set.
+   */
+  'channel': (_grpc_channelz_v1_Channel__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetServerRequest.ts

@@ -0,0 +1,17 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface GetServerRequest {
+  /**
+   * server_id is the identifier of the specific server to get.
+   */
+  'server_id'?: (number | string | Long);
+}
+
+export interface GetServerRequest__Output {
+  /**
+   * server_id is the identifier of the specific server to get.
+   */
+  'server_id': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetServerResponse.ts

@@ -0,0 +1,19 @@
+// Original file: proto/channelz.proto
+
+import type { Server as _grpc_channelz_v1_Server, Server__Output as _grpc_channelz_v1_Server__Output } from '../../../grpc/channelz/v1/Server';
+
+export interface GetServerResponse {
+  /**
+   * The Server that corresponds to the requested server_id.  This field
+   * should be set.
+   */
+  'server'?: (_grpc_channelz_v1_Server | null);
+}
+
+export interface GetServerResponse__Output {
+  /**
+   * The Server that corresponds to the requested server_id.  This field
+   * should be set.
+   */
+  'server': (_grpc_channelz_v1_Server__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetServerSocketsRequest.ts

@@ -0,0 +1,39 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface GetServerSocketsRequest {
+  'server_id'?: (number | string | Long);
+  /**
+   * start_socket_id indicates that only sockets at or above this id should be
+   * included in the results.
+   * To request the first page, this must be set to 0. To request
+   * subsequent pages, the client generates this value by adding 1 to
+   * the highest seen result ID.
+   */
+  'start_socket_id'?: (number | string | Long);
+  /**
+   * If non-zero, the server will return a page of results containing
+   * at most this many items. If zero, the server will choose a
+   * reasonable page size.  Must never be negative.
+   */
+  'max_results'?: (number | string | Long);
+}
+
+export interface GetServerSocketsRequest__Output {
+  'server_id': (string);
+  /**
+   * start_socket_id indicates that only sockets at or above this id should be
+   * included in the results.
+   * To request the first page, this must be set to 0. To request
+   * subsequent pages, the client generates this value by adding 1 to
+   * the highest seen result ID.
+   */
+  'start_socket_id': (string);
+  /**
+   * If non-zero, the server will return a page of results containing
+   * at most this many items. If zero, the server will choose a
+   * reasonable page size.  Must never be negative.
+   */
+  'max_results': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetServerSocketsResponse.ts

@@ -0,0 +1,33 @@
+// Original file: proto/channelz.proto
+
+import type { SocketRef as _grpc_channelz_v1_SocketRef, SocketRef__Output as _grpc_channelz_v1_SocketRef__Output } from '../../../grpc/channelz/v1/SocketRef';
+
+export interface GetServerSocketsResponse {
+  /**
+   * list of socket refs that the connection detail service knows about.  Sorted in
+   * ascending socket_id order.
+   * Must contain at least 1 result, otherwise 'end' must be true.
+   */
+  'socket_ref'?: (_grpc_channelz_v1_SocketRef)[];
+  /**
+   * If set, indicates that the list of sockets is the final list.  Requesting
+   * more sockets will only return more if they are created after this RPC
+   * completes.
+   */
+  'end'?: (boolean);
+}
+
+export interface GetServerSocketsResponse__Output {
+  /**
+   * list of socket refs that the connection detail service knows about.  Sorted in
+   * ascending socket_id order.
+   * Must contain at least 1 result, otherwise 'end' must be true.
+   */
+  'socket_ref': (_grpc_channelz_v1_SocketRef__Output)[];
+  /**
+   * If set, indicates that the list of sockets is the final list.  Requesting
+   * more sockets will only return more if they are created after this RPC
+   * completes.
+   */
+  'end': (boolean);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetServersRequest.ts

@@ -0,0 +1,37 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface GetServersRequest {
+  /**
+   * start_server_id indicates that only servers at or above this id should be
+   * included in the results.
+   * To request the first page, this must be set to 0. To request
+   * subsequent pages, the client generates this value by adding 1 to
+   * the highest seen result ID.
+   */
+  'start_server_id'?: (number | string | Long);
+  /**
+   * If non-zero, the server will return a page of results containing
+   * at most this many items. If zero, the server will choose a
+   * reasonable page size.  Must never be negative.
+   */
+  'max_results'?: (number | string | Long);
+}
+
+export interface GetServersRequest__Output {
+  /**
+   * start_server_id indicates that only servers at or above this id should be
+   * included in the results.
+   * To request the first page, this must be set to 0. To request
+   * subsequent pages, the client generates this value by adding 1 to
+   * the highest seen result ID.
+   */
+  'start_server_id': (string);
+  /**
+   * If non-zero, the server will return a page of results containing
+   * at most this many items. If zero, the server will choose a
+   * reasonable page size.  Must never be negative.
+   */
+  'max_results': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetServersResponse.ts

@@ -0,0 +1,33 @@
+// Original file: proto/channelz.proto
+
+import type { Server as _grpc_channelz_v1_Server, Server__Output as _grpc_channelz_v1_Server__Output } from '../../../grpc/channelz/v1/Server';
+
+export interface GetServersResponse {
+  /**
+   * list of servers that the connection detail service knows about.  Sorted in
+   * ascending server_id order.
+   * Must contain at least 1 result, otherwise 'end' must be true.
+   */
+  'server'?: (_grpc_channelz_v1_Server)[];
+  /**
+   * If set, indicates that the list of servers is the final list.  Requesting
+   * more servers will only return more if they are created after this RPC
+   * completes.
+   */
+  'end'?: (boolean);
+}
+
+export interface GetServersResponse__Output {
+  /**
+   * list of servers that the connection detail service knows about.  Sorted in
+   * ascending server_id order.
+   * Must contain at least 1 result, otherwise 'end' must be true.
+   */
+  'server': (_grpc_channelz_v1_Server__Output)[];
+  /**
+   * If set, indicates that the list of servers is the final list.  Requesting
+   * more servers will only return more if they are created after this RPC
+   * completes.
+   */
+  'end': (boolean);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetSocketRequest.ts

@@ -0,0 +1,29 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface GetSocketRequest {
+  /**
+   * socket_id is the identifier of the specific socket to get.
+   */
+  'socket_id'?: (number | string | Long);
+  /**
+   * If true, the response will contain only high level information
+   * that is inexpensive to obtain. Fields thay may be omitted are
+   * documented.
+   */
+  'summary'?: (boolean);
+}
+
+export interface GetSocketRequest__Output {
+  /**
+   * socket_id is the identifier of the specific socket to get.
+   */
+  'socket_id': (string);
+  /**
+   * If true, the response will contain only high level information
+   * that is inexpensive to obtain. Fields thay may be omitted are
+   * documented.
+   */
+  'summary': (boolean);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetSocketResponse.ts

@@ -0,0 +1,19 @@
+// Original file: proto/channelz.proto
+
+import type { Socket as _grpc_channelz_v1_Socket, Socket__Output as _grpc_channelz_v1_Socket__Output } from '../../../grpc/channelz/v1/Socket';
+
+export interface GetSocketResponse {
+  /**
+   * The Socket that corresponds to the requested socket_id.  This field
+   * should be set.
+   */
+  'socket'?: (_grpc_channelz_v1_Socket | null);
+}
+
+export interface GetSocketResponse__Output {
+  /**
+   * The Socket that corresponds to the requested socket_id.  This field
+   * should be set.
+   */
+  'socket': (_grpc_channelz_v1_Socket__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetSubchannelRequest.ts

@@ -0,0 +1,17 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface GetSubchannelRequest {
+  /**
+   * subchannel_id is the identifier of the specific subchannel to get.
+   */
+  'subchannel_id'?: (number | string | Long);
+}
+
+export interface GetSubchannelRequest__Output {
+  /**
+   * subchannel_id is the identifier of the specific subchannel to get.
+   */
+  'subchannel_id': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetSubchannelResponse.ts

@@ -0,0 +1,19 @@
+// Original file: proto/channelz.proto
+
+import type { Subchannel as _grpc_channelz_v1_Subchannel, Subchannel__Output as _grpc_channelz_v1_Subchannel__Output } from '../../../grpc/channelz/v1/Subchannel';
+
+export interface GetSubchannelResponse {
+  /**
+   * The Subchannel that corresponds to the requested subchannel_id.  This
+   * field should be set.
+   */
+  'subchannel'?: (_grpc_channelz_v1_Subchannel | null);
+}
+
+export interface GetSubchannelResponse__Output {
+  /**
+   * The Subchannel that corresponds to the requested subchannel_id.  This
+   * field should be set.
+   */
+  'subchannel': (_grpc_channelz_v1_Subchannel__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetTopChannelsRequest.ts

@@ -0,0 +1,37 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+export interface GetTopChannelsRequest {
+  /**
+   * start_channel_id indicates that only channels at or above this id should be
+   * included in the results.
+   * To request the first page, this should be set to 0. To request
+   * subsequent pages, the client generates this value by adding 1 to
+   * the highest seen result ID.
+   */
+  'start_channel_id'?: (number | string | Long);
+  /**
+   * If non-zero, the server will return a page of results containing
+   * at most this many items. If zero, the server will choose a
+   * reasonable page size.  Must never be negative.
+   */
+  'max_results'?: (number | string | Long);
+}
+
+export interface GetTopChannelsRequest__Output {
+  /**
+   * start_channel_id indicates that only channels at or above this id should be
+   * included in the results.
+   * To request the first page, this should be set to 0. To request
+   * subsequent pages, the client generates this value by adding 1 to
+   * the highest seen result ID.
+   */
+  'start_channel_id': (string);
+  /**
+   * If non-zero, the server will return a page of results containing
+   * at most this many items. If zero, the server will choose a
+   * reasonable page size.  Must never be negative.
+   */
+  'max_results': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/GetTopChannelsResponse.ts

@@ -0,0 +1,33 @@
+// Original file: proto/channelz.proto
+
+import type { Channel as _grpc_channelz_v1_Channel, Channel__Output as _grpc_channelz_v1_Channel__Output } from '../../../grpc/channelz/v1/Channel';
+
+export interface GetTopChannelsResponse {
+  /**
+   * list of channels that the connection detail service knows about.  Sorted in
+   * ascending channel_id order.
+   * Must contain at least 1 result, otherwise 'end' must be true.
+   */
+  'channel'?: (_grpc_channelz_v1_Channel)[];
+  /**
+   * If set, indicates that the list of channels is the final list.  Requesting
+   * more channels can only return more if they are created after this RPC
+   * completes.
+   */
+  'end'?: (boolean);
+}
+
+export interface GetTopChannelsResponse__Output {
+  /**
+   * list of channels that the connection detail service knows about.  Sorted in
+   * ascending channel_id order.
+   * Must contain at least 1 result, otherwise 'end' must be true.
+   */
+  'channel': (_grpc_channelz_v1_Channel__Output)[];
+  /**
+   * If set, indicates that the list of channels is the final list.  Requesting
+   * more channels can only return more if they are created after this RPC
+   * completes.
+   */
+  'end': (boolean);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/Security.ts

@@ -0,0 +1,87 @@
+// Original file: proto/channelz.proto
+
+import type { Any as _google_protobuf_Any, Any__Output as _google_protobuf_Any__Output } from '../../../google/protobuf/Any';
+
+export interface _grpc_channelz_v1_Security_OtherSecurity {
+  /**
+   * The human readable version of the value.
+   */
+  'name'?: (string);
+  /**
+   * The actual security details message.
+   */
+  'value'?: (_google_protobuf_Any | null);
+}
+
+export interface _grpc_channelz_v1_Security_OtherSecurity__Output {
+  /**
+   * The human readable version of the value.
+   */
+  'name': (string);
+  /**
+   * The actual security details message.
+   */
+  'value': (_google_protobuf_Any__Output | null);
+}
+
+export interface _grpc_channelz_v1_Security_Tls {
+  /**
+   * The cipher suite name in the RFC 4346 format:
+   * https://tools.ietf.org/html/rfc4346#appendix-C
+   */
+  'standard_name'?: (string);
+  /**
+   * Some other way to describe the cipher suite if
+   * the RFC 4346 name is not available.
+   */
+  'other_name'?: (string);
+  /**
+   * the certificate used by this endpoint.
+   */
+  'local_certificate'?: (Buffer | Uint8Array | string);
+  /**
+   * the certificate used by the remote endpoint.
+   */
+  'remote_certificate'?: (Buffer | Uint8Array | string);
+  'cipher_suite'?: "standard_name"|"other_name";
+}
+
+export interface _grpc_channelz_v1_Security_Tls__Output {
+  /**
+   * The cipher suite name in the RFC 4346 format:
+   * https://tools.ietf.org/html/rfc4346#appendix-C
+   */
+  'standard_name'?: (string);
+  /**
+   * Some other way to describe the cipher suite if
+   * the RFC 4346 name is not available.
+   */
+  'other_name'?: (string);
+  /**
+   * the certificate used by this endpoint.
+   */
+  'local_certificate': (Buffer);
+  /**
+   * the certificate used by the remote endpoint.
+   */
+  'remote_certificate': (Buffer);
+  'cipher_suite': "standard_name"|"other_name";
+}
+
+/**
+ * Security represents details about how secure the socket is.
+ */
+export interface Security {
+  'tls'?: (_grpc_channelz_v1_Security_Tls | null);
+  'other'?: (_grpc_channelz_v1_Security_OtherSecurity | null);
+  'model'?: "tls"|"other";
+}
+
+/**
+ * Security represents details about how secure the socket is.
+ */
+export interface Security__Output {
+  'tls'?: (_grpc_channelz_v1_Security_Tls__Output | null);
+  'other'?: (_grpc_channelz_v1_Security_OtherSecurity__Output | null);
+  'model': "tls"|"other";
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/Server.ts

@@ -0,0 +1,45 @@
+// Original file: proto/channelz.proto
+
+import type { ServerRef as _grpc_channelz_v1_ServerRef, ServerRef__Output as _grpc_channelz_v1_ServerRef__Output } from '../../../grpc/channelz/v1/ServerRef';
+import type { ServerData as _grpc_channelz_v1_ServerData, ServerData__Output as _grpc_channelz_v1_ServerData__Output } from '../../../grpc/channelz/v1/ServerData';
+import type { SocketRef as _grpc_channelz_v1_SocketRef, SocketRef__Output as _grpc_channelz_v1_SocketRef__Output } from '../../../grpc/channelz/v1/SocketRef';
+
+/**
+ * Server represents a single server.  There may be multiple servers in a single
+ * program.
+ */
+export interface Server {
+  /**
+   * The identifier for a Server.  This should be set.
+   */
+  'ref'?: (_grpc_channelz_v1_ServerRef | null);
+  /**
+   * The associated data of the Server.
+   */
+  'data'?: (_grpc_channelz_v1_ServerData | null);
+  /**
+   * The sockets that the server is listening on.  There are no ordering
+   * guarantees.  This may be absent.
+   */
+  'listen_socket'?: (_grpc_channelz_v1_SocketRef)[];
+}
+
+/**
+ * Server represents a single server.  There may be multiple servers in a single
+ * program.
+ */
+export interface Server__Output {
+  /**
+   * The identifier for a Server.  This should be set.
+   */
+  'ref': (_grpc_channelz_v1_ServerRef__Output | null);
+  /**
+   * The associated data of the Server.
+   */
+  'data': (_grpc_channelz_v1_ServerData__Output | null);
+  /**
+   * The sockets that the server is listening on.  There are no ordering
+   * guarantees.  This may be absent.
+   */
+  'listen_socket': (_grpc_channelz_v1_SocketRef__Output)[];
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/ServerData.ts

@@ -0,0 +1,57 @@
+// Original file: proto/channelz.proto
+
+import type { ChannelTrace as _grpc_channelz_v1_ChannelTrace, ChannelTrace__Output as _grpc_channelz_v1_ChannelTrace__Output } from '../../../grpc/channelz/v1/ChannelTrace';
+import type { Timestamp as _google_protobuf_Timestamp, Timestamp__Output as _google_protobuf_Timestamp__Output } from '../../../google/protobuf/Timestamp';
+import type { Long } from '@grpc/proto-loader';
+
+/**
+ * ServerData is data for a specific Server.
+ */
+export interface ServerData {
+  /**
+   * A trace of recent events on the server.  May be absent.
+   */
+  'trace'?: (_grpc_channelz_v1_ChannelTrace | null);
+  /**
+   * The number of incoming calls started on the server
+   */
+  'calls_started'?: (number | string | Long);
+  /**
+   * The number of incoming calls that have completed with an OK status
+   */
+  'calls_succeeded'?: (number | string | Long);
+  /**
+   * The number of incoming calls that have a completed with a non-OK status
+   */
+  'calls_failed'?: (number | string | Long);
+  /**
+   * The last time a call was started on the server.
+   */
+  'last_call_started_timestamp'?: (_google_protobuf_Timestamp | null);
+}
+
+/**
+ * ServerData is data for a specific Server.
+ */
+export interface ServerData__Output {
+  /**
+   * A trace of recent events on the server.  May be absent.
+   */
+  'trace': (_grpc_channelz_v1_ChannelTrace__Output | null);
+  /**
+   * The number of incoming calls started on the server
+   */
+  'calls_started': (string);
+  /**
+   * The number of incoming calls that have completed with an OK status
+   */
+  'calls_succeeded': (string);
+  /**
+   * The number of incoming calls that have a completed with a non-OK status
+   */
+  'calls_failed': (string);
+  /**
+   * The last time a call was started on the server.
+   */
+  'last_call_started_timestamp': (_google_protobuf_Timestamp__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/ServerRef.ts

@@ -0,0 +1,31 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+/**
+ * ServerRef is a reference to a Server.
+ */
+export interface ServerRef {
+  /**
+   * A globally unique identifier for this server.  Must be a positive number.
+   */
+  'server_id'?: (number | string | Long);
+  /**
+   * An optional name associated with the server.
+   */
+  'name'?: (string);
+}
+
+/**
+ * ServerRef is a reference to a Server.
+ */
+export interface ServerRef__Output {
+  /**
+   * A globally unique identifier for this server.  Must be a positive number.
+   */
+  'server_id': (string);
+  /**
+   * An optional name associated with the server.
+   */
+  'name': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/Socket.ts

@@ -0,0 +1,70 @@
+// Original file: proto/channelz.proto
+
+import type { SocketRef as _grpc_channelz_v1_SocketRef, SocketRef__Output as _grpc_channelz_v1_SocketRef__Output } from '../../../grpc/channelz/v1/SocketRef';
+import type { SocketData as _grpc_channelz_v1_SocketData, SocketData__Output as _grpc_channelz_v1_SocketData__Output } from '../../../grpc/channelz/v1/SocketData';
+import type { Address as _grpc_channelz_v1_Address, Address__Output as _grpc_channelz_v1_Address__Output } from '../../../grpc/channelz/v1/Address';
+import type { Security as _grpc_channelz_v1_Security, Security__Output as _grpc_channelz_v1_Security__Output } from '../../../grpc/channelz/v1/Security';
+
+/**
+ * Information about an actual connection.  Pronounced "sock-ay".
+ */
+export interface Socket {
+  /**
+   * The identifier for the Socket.
+   */
+  'ref'?: (_grpc_channelz_v1_SocketRef | null);
+  /**
+   * Data specific to this Socket.
+   */
+  'data'?: (_grpc_channelz_v1_SocketData | null);
+  /**
+   * The locally bound address.
+   */
+  'local'?: (_grpc_channelz_v1_Address | null);
+  /**
+   * The remote bound address.  May be absent.
+   */
+  'remote'?: (_grpc_channelz_v1_Address | null);
+  /**
+   * Security details for this socket.  May be absent if not available, or
+   * there is no security on the socket.
+   */
+  'security'?: (_grpc_channelz_v1_Security | null);
+  /**
+   * Optional, represents the name of the remote endpoint, if different than
+   * the original target name.
+   */
+  'remote_name'?: (string);
+}
+
+/**
+ * Information about an actual connection.  Pronounced "sock-ay".
+ */
+export interface Socket__Output {
+  /**
+   * The identifier for the Socket.
+   */
+  'ref': (_grpc_channelz_v1_SocketRef__Output | null);
+  /**
+   * Data specific to this Socket.
+   */
+  'data': (_grpc_channelz_v1_SocketData__Output | null);
+  /**
+   * The locally bound address.
+   */
+  'local': (_grpc_channelz_v1_Address__Output | null);
+  /**
+   * The remote bound address.  May be absent.
+   */
+  'remote': (_grpc_channelz_v1_Address__Output | null);
+  /**
+   * Security details for this socket.  May be absent if not available, or
+   * there is no security on the socket.
+   */
+  'security': (_grpc_channelz_v1_Security__Output | null);
+  /**
+   * Optional, represents the name of the remote endpoint, if different than
+   * the original target name.
+   */
+  'remote_name': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/SocketData.ts

@@ -0,0 +1,150 @@
+// Original file: proto/channelz.proto
+
+import type { Timestamp as _google_protobuf_Timestamp, Timestamp__Output as _google_protobuf_Timestamp__Output } from '../../../google/protobuf/Timestamp';
+import type { Int64Value as _google_protobuf_Int64Value, Int64Value__Output as _google_protobuf_Int64Value__Output } from '../../../google/protobuf/Int64Value';
+import type { SocketOption as _grpc_channelz_v1_SocketOption, SocketOption__Output as _grpc_channelz_v1_SocketOption__Output } from '../../../grpc/channelz/v1/SocketOption';
+import type { Long } from '@grpc/proto-loader';
+
+/**
+ * SocketData is data associated for a specific Socket.  The fields present
+ * are specific to the implementation, so there may be minor differences in
+ * the semantics.  (e.g. flow control windows)
+ */
+export interface SocketData {
+  /**
+   * The number of streams that have been started.
+   */
+  'streams_started'?: (number | string | Long);
+  /**
+   * The number of streams that have ended successfully:
+   * On client side, received frame with eos bit set;
+   * On server side, sent frame with eos bit set.
+   */
+  'streams_succeeded'?: (number | string | Long);
+  /**
+   * The number of streams that have ended unsuccessfully:
+   * On client side, ended without receiving frame with eos bit set;
+   * On server side, ended without sending frame with eos bit set.
+   */
+  'streams_failed'?: (number | string | Long);
+  /**
+   * The number of grpc messages successfully sent on this socket.
+   */
+  'messages_sent'?: (number | string | Long);
+  /**
+   * The number of grpc messages received on this socket.
+   */
+  'messages_received'?: (number | string | Long);
+  /**
+   * The number of keep alives sent.  This is typically implemented with HTTP/2
+   * ping messages.
+   */
+  'keep_alives_sent'?: (number | string | Long);
+  /**
+   * The last time a stream was created by this endpoint.  Usually unset for
+   * servers.
+   */
+  'last_local_stream_created_timestamp'?: (_google_protobuf_Timestamp | null);
+  /**
+   * The last time a stream was created by the remote endpoint.  Usually unset
+   * for clients.
+   */
+  'last_remote_stream_created_timestamp'?: (_google_protobuf_Timestamp | null);
+  /**
+   * The last time a message was sent by this endpoint.
+   */
+  'last_message_sent_timestamp'?: (_google_protobuf_Timestamp | null);
+  /**
+   * The last time a message was received by this endpoint.
+   */
+  'last_message_received_timestamp'?: (_google_protobuf_Timestamp | null);
+  /**
+   * The amount of window, granted to the local endpoint by the remote endpoint.
+   * This may be slightly out of date due to network latency.  This does NOT
+   * include stream level or TCP level flow control info.
+   */
+  'local_flow_control_window'?: (_google_protobuf_Int64Value | null);
+  /**
+   * The amount of window, granted to the remote endpoint by the local endpoint.
+   * This may be slightly out of date due to network latency.  This does NOT
+   * include stream level or TCP level flow control info.
+   */
+  'remote_flow_control_window'?: (_google_protobuf_Int64Value | null);
+  /**
+   * Socket options set on this socket.  May be absent if 'summary' is set
+   * on GetSocketRequest.
+   */
+  'option'?: (_grpc_channelz_v1_SocketOption)[];
+}
+
+/**
+ * SocketData is data associated for a specific Socket.  The fields present
+ * are specific to the implementation, so there may be minor differences in
+ * the semantics.  (e.g. flow control windows)
+ */
+export interface SocketData__Output {
+  /**
+   * The number of streams that have been started.
+   */
+  'streams_started': (string);
+  /**
+   * The number of streams that have ended successfully:
+   * On client side, received frame with eos bit set;
+   * On server side, sent frame with eos bit set.
+   */
+  'streams_succeeded': (string);
+  /**
+   * The number of streams that have ended unsuccessfully:
+   * On client side, ended without receiving frame with eos bit set;
+   * On server side, ended without sending frame with eos bit set.
+   */
+  'streams_failed': (string);
+  /**
+   * The number of grpc messages successfully sent on this socket.
+   */
+  'messages_sent': (string);
+  /**
+   * The number of grpc messages received on this socket.
+   */
+  'messages_received': (string);
+  /**
+   * The number of keep alives sent.  This is typically implemented with HTTP/2
+   * ping messages.
+   */
+  'keep_alives_sent': (string);
+  /**
+   * The last time a stream was created by this endpoint.  Usually unset for
+   * servers.
+   */
+  'last_local_stream_created_timestamp': (_google_protobuf_Timestamp__Output | null);
+  /**
+   * The last time a stream was created by the remote endpoint.  Usually unset
+   * for clients.
+   */
+  'last_remote_stream_created_timestamp': (_google_protobuf_Timestamp__Output | null);
+  /**
+   * The last time a message was sent by this endpoint.
+   */
+  'last_message_sent_timestamp': (_google_protobuf_Timestamp__Output | null);
+  /**
+   * The last time a message was received by this endpoint.
+   */
+  'last_message_received_timestamp': (_google_protobuf_Timestamp__Output | null);
+  /**
+   * The amount of window, granted to the local endpoint by the remote endpoint.
+   * This may be slightly out of date due to network latency.  This does NOT
+   * include stream level or TCP level flow control info.
+   */
+  'local_flow_control_window': (_google_protobuf_Int64Value__Output | null);
+  /**
+   * The amount of window, granted to the remote endpoint by the local endpoint.
+   * This may be slightly out of date due to network latency.  This does NOT
+   * include stream level or TCP level flow control info.
+   */
+  'remote_flow_control_window': (_google_protobuf_Int64Value__Output | null);
+  /**
+   * Socket options set on this socket.  May be absent if 'summary' is set
+   * on GetSocketRequest.
+   */
+  'option': (_grpc_channelz_v1_SocketOption__Output)[];
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/SocketOption.ts

@@ -0,0 +1,47 @@
+// Original file: proto/channelz.proto
+
+import type { Any as _google_protobuf_Any, Any__Output as _google_protobuf_Any__Output } from '../../../google/protobuf/Any';
+
+/**
+ * SocketOption represents socket options for a socket.  Specifically, these
+ * are the options returned by getsockopt().
+ */
+export interface SocketOption {
+  /**
+   * The full name of the socket option.  Typically this will be the upper case
+   * name, such as "SO_REUSEPORT".
+   */
+  'name'?: (string);
+  /**
+   * The human readable value of this socket option.  At least one of value or
+   * additional will be set.
+   */
+  'value'?: (string);
+  /**
+   * Additional data associated with the socket option.  At least one of value
+   * or additional will be set.
+   */
+  'additional'?: (_google_protobuf_Any | null);
+}
+
+/**
+ * SocketOption represents socket options for a socket.  Specifically, these
+ * are the options returned by getsockopt().
+ */
+export interface SocketOption__Output {
+  /**
+   * The full name of the socket option.  Typically this will be the upper case
+   * name, such as "SO_REUSEPORT".
+   */
+  'name': (string);
+  /**
+   * The human readable value of this socket option.  At least one of value or
+   * additional will be set.
+   */
+  'value': (string);
+  /**
+   * Additional data associated with the socket option.  At least one of value
+   * or additional will be set.
+   */
+  'additional': (_google_protobuf_Any__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/SocketOptionLinger.ts

@@ -0,0 +1,33 @@
+// Original file: proto/channelz.proto
+
+import type { Duration as _google_protobuf_Duration, Duration__Output as _google_protobuf_Duration__Output } from '../../../google/protobuf/Duration';
+
+/**
+ * For use with SocketOption's additional field.  This is primarily used for
+ * SO_LINGER.
+ */
+export interface SocketOptionLinger {
+  /**
+   * active maps to `struct linger.l_onoff`
+   */
+  'active'?: (boolean);
+  /**
+   * duration maps to `struct linger.l_linger`
+   */
+  'duration'?: (_google_protobuf_Duration | null);
+}
+
+/**
+ * For use with SocketOption's additional field.  This is primarily used for
+ * SO_LINGER.
+ */
+export interface SocketOptionLinger__Output {
+  /**
+   * active maps to `struct linger.l_onoff`
+   */
+  'active': (boolean);
+  /**
+   * duration maps to `struct linger.l_linger`
+   */
+  'duration': (_google_protobuf_Duration__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/SocketOptionTcpInfo.ts

@@ -0,0 +1,74 @@
+// Original file: proto/channelz.proto
+
+
+/**
+ * For use with SocketOption's additional field.  Tcp info for
+ * SOL_TCP and TCP_INFO.
+ */
+export interface SocketOptionTcpInfo {
+  'tcpi_state'?: (number);
+  'tcpi_ca_state'?: (number);
+  'tcpi_retransmits'?: (number);
+  'tcpi_probes'?: (number);
+  'tcpi_backoff'?: (number);
+  'tcpi_options'?: (number);
+  'tcpi_snd_wscale'?: (number);
+  'tcpi_rcv_wscale'?: (number);
+  'tcpi_rto'?: (number);
+  'tcpi_ato'?: (number);
+  'tcpi_snd_mss'?: (number);
+  'tcpi_rcv_mss'?: (number);
+  'tcpi_unacked'?: (number);
+  'tcpi_sacked'?: (number);
+  'tcpi_lost'?: (number);
+  'tcpi_retrans'?: (number);
+  'tcpi_fackets'?: (number);
+  'tcpi_last_data_sent'?: (number);
+  'tcpi_last_ack_sent'?: (number);
+  'tcpi_last_data_recv'?: (number);
+  'tcpi_last_ack_recv'?: (number);
+  'tcpi_pmtu'?: (number);
+  'tcpi_rcv_ssthresh'?: (number);
+  'tcpi_rtt'?: (number);
+  'tcpi_rttvar'?: (number);
+  'tcpi_snd_ssthresh'?: (number);
+  'tcpi_snd_cwnd'?: (number);
+  'tcpi_advmss'?: (number);
+  'tcpi_reordering'?: (number);
+}
+
+/**
+ * For use with SocketOption's additional field.  Tcp info for
+ * SOL_TCP and TCP_INFO.
+ */
+export interface SocketOptionTcpInfo__Output {
+  'tcpi_state': (number);
+  'tcpi_ca_state': (number);
+  'tcpi_retransmits': (number);
+  'tcpi_probes': (number);
+  'tcpi_backoff': (number);
+  'tcpi_options': (number);
+  'tcpi_snd_wscale': (number);
+  'tcpi_rcv_wscale': (number);
+  'tcpi_rto': (number);
+  'tcpi_ato': (number);
+  'tcpi_snd_mss': (number);
+  'tcpi_rcv_mss': (number);
+  'tcpi_unacked': (number);
+  'tcpi_sacked': (number);
+  'tcpi_lost': (number);
+  'tcpi_retrans': (number);
+  'tcpi_fackets': (number);
+  'tcpi_last_data_sent': (number);
+  'tcpi_last_ack_sent': (number);
+  'tcpi_last_data_recv': (number);
+  'tcpi_last_ack_recv': (number);
+  'tcpi_pmtu': (number);
+  'tcpi_rcv_ssthresh': (number);
+  'tcpi_rtt': (number);
+  'tcpi_rttvar': (number);
+  'tcpi_snd_ssthresh': (number);
+  'tcpi_snd_cwnd': (number);
+  'tcpi_advmss': (number);
+  'tcpi_reordering': (number);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/SocketOptionTimeout.ts

@@ -0,0 +1,19 @@
+// Original file: proto/channelz.proto
+
+import type { Duration as _google_protobuf_Duration, Duration__Output as _google_protobuf_Duration__Output } from '../../../google/protobuf/Duration';
+
+/**
+ * For use with SocketOption's additional field.  This is primarily used for
+ * SO_RCVTIMEO and SO_SNDTIMEO
+ */
+export interface SocketOptionTimeout {
+  'duration'?: (_google_protobuf_Duration | null);
+}
+
+/**
+ * For use with SocketOption's additional field.  This is primarily used for
+ * SO_RCVTIMEO and SO_SNDTIMEO
+ */
+export interface SocketOptionTimeout__Output {
+  'duration': (_google_protobuf_Duration__Output | null);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/SocketRef.ts

@@ -0,0 +1,31 @@
+// Original file: proto/channelz.proto
+
+import type { Long } from '@grpc/proto-loader';
+
+/**
+ * SocketRef is a reference to a Socket.
+ */
+export interface SocketRef {
+  /**
+   * The globally unique id for this socket.  Must be a positive number.
+   */
+  'socket_id'?: (number | string | Long);
+  /**
+   * An optional name associated with the socket.
+   */
+  'name'?: (string);
+}
+
+/**
+ * SocketRef is a reference to a Socket.
+ */
+export interface SocketRef__Output {
+  /**
+   * The globally unique id for this socket.  Must be a positive number.
+   */
+  'socket_id': (string);
+  /**
+   * An optional name associated with the socket.
+   */
+  'name': (string);
+}

travel-backend/node_modules/@grpc/grpc-js/src/generated/grpc/channelz/v1/Subchannel.ts

@@ -0,0 +1,70 @@
+// Original file: proto/channelz.proto
+
+import type { SubchannelRef as _grpc_channelz_v1_SubchannelRef, SubchannelRef__Output as _grpc_channelz_v1_SubchannelRef__Output } from '../../../grpc/channelz/v1/SubchannelRef';
+import type { ChannelData as _grpc_channelz_v1_ChannelData, ChannelData__Output as _grpc_channelz_v1_ChannelData__Output } from '../../../grpc/channelz/v1/ChannelData';
+import type { ChannelRef as _grpc_channelz_v1_ChannelRef, ChannelRef__Output as _grpc_channelz_v1_ChannelRef__Output } from '../../../grpc/channelz/v1/ChannelRef';
+import type { SocketRef as _grpc_channelz_v1_SocketRef, SocketRef__Output as _grpc_channelz_v1_SocketRef__Output } from '../../../grpc/channelz/v1/SocketRef';
+
+/**
+ * Subchannel is a logical grouping of channels, subchannels, and sockets.
+ * A subchannel is load balanced over by it's ancestor
+ */
+export interface Subchannel {
+  /**
+   * The identifier for this channel.
+   */
+  'ref'?: (_grpc_channelz_v1_SubchannelRef | null);
+  /**
+   * Data specific to this channel.
+   */
+  'data'?: (_grpc_channelz_v1_ChannelData | null);
+  /**
+   * There are no ordering guarantees on the order of channel refs.
+   * There may not be cycles in the ref graph.
+   * A channel ref may be present in more than one channel or subchannel.
+   */
+  'channel_ref'?: (_grpc_channelz_v1_ChannelRef)[];
+  /**
+   * At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+   * There are no ordering guarantees on the order of subchannel refs.
+   * There may not be cycles in the ref graph.
+   * A sub channel ref may be present in more than one channel or subchannel.
+   */
+  'subchannel_ref'?: (_grpc_channelz_v1_SubchannelRef)[];
+  /**
+   * There are no ordering guarantees on the order of sockets.
+   */
+  'socket_ref'?: (_grpc_channelz_v1_SocketRef)[];
+}
+
+/**
+ * Subchannel is a logical grouping of channels, subchannels, and sockets.
+ * A subchannel is load balanced over by it's ancestor
+ */
+export interface Subchannel__Output {
+  /**
+   * The identifier for this channel.
+   */
+  'ref': (_grpc_channelz_v1_SubchannelRef__Output | null);
+  /**
+   * Data specific to this channel.
+   */
+  'data': (_grpc_channelz_v1_ChannelData__Output | null);
+  /**
+   * There are no ordering guarantees on the order of channel refs.
+   * There may not be cycles in the ref graph.
+   * A channel ref may be present in more than one channel or subchannel.
+   */
+  'channel_ref': (_grpc_channelz_v1_ChannelRef__Output)[];
+  /**
+   * At most one of 'channel_ref+subchannel_ref' and 'socket' is set.
+   * There are no ordering guarantees on the order of subchannel refs.
+   * There may not be cycles in the ref graph.
+   * A sub channel ref may be present in more than one channel or subchannel.
+   */
+  'subchannel_ref': (_grpc_channelz_v1_SubchannelRef__Output)[];
+  /**
+   * There are no ordering guarantees on the order of sockets.
+   */
+  'socket_ref': (_grpc_channelz_v1_SocketRef__Output)[];
+}