Add langchain example

sidevm-quickjs/examples/gpt-langchain-sdk/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "langchain-sdk-demo",
+  "version": "1.0.0",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "webpack",
+    "test": "webpack && phatjs dist/index.js"
+  },
+  "license": "Apache-2.0",
+  "dependencies": {
+    "@langchain/openai": "^0.0.15",
+    "@phala/sidevm-env": "^1.0.2",
+    "array.prototype.flatmap": "^1.3.1"
+  },
+  "devDependencies": {
+    "@swc/cli": "^0.1.62",
+    "@swc/core": "^1.3.51",
+    "@typescript-eslint/eslint-plugin": "^5.0.0",
+    "eslint": "^8.0.1",
+    "eslint-config-standard-with-typescript": "^26.0.0",
+    "eslint-plugin-import": "^2.25.2",
+    "eslint-plugin-n": "^15.0.0",
+    "eslint-plugin-promise": "^6.0.0",
+    "ts-loader": "^9.4.2",
+    "typescript": "*",
+    "webpack": "^5.75.0",
+    "webpack-cli": "^5.0.1"
+  }
+}

sidevm-quickjs/examples/gpt-langchain-sdk/spack.config.js

@@ -0,0 +1,8 @@
+module.exports = {
+    entry: {
+        web: __dirname + "/src/index.ts",
+    },
+    output: {
+        path: __dirname + "/dist",
+    },
+};

sidevm-quickjs/examples/gpt-langchain-sdk/src/index.ts

@@ -0,0 +1,14 @@
+import "@phala/sidevm-env"
+import { ChatOpenAI } from "@langchain/openai";
+
+const OPENAI_API_KEY = "";
+
+async function main() {
+    const chatModel = new ChatOpenAI({
+        openAIApiKey: OPENAI_API_KEY
+    });
+    const response = await chatModel.invoke("what is LangSmith?");
+    console.log("response:", JSON.stringify(response));
+}
+
+main().catch(console.error).finally(() => Sidevm.exit());

sidevm-quickjs/examples/gpt-langchain-sdk/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "outDir": "./dist/",
+    "noImplicitAny": true,
+    "module": "es6",
+    "target": "es2020",
+    "allowJs": true,
+    "moduleResolution": "node"
+  }
+}

sidevm-quickjs/examples/gpt-langchain-sdk/webpack.config.js

@@ -0,0 +1,23 @@
+const path = require('path');
+
+module.exports = {
+  entry: './src/index',
+  mode: 'production',
+  output: {
+    filename: 'index.js',
+    path: path.resolve(__dirname, 'dist'),
+  },
+  module: {
+    rules: [
+      {
+        test: /\.tsx?$/,
+        use: 'ts-loader',
+        exclude: /node_modules/,
+      },
+    ],
+  },
+  resolve: {
+    extensions: ['.tsx', '.ts', '.js'],
+  },
+  target: 'web',
+};

sidevm-quickjs/examples/gpt-openai-sdk/package.json

@@ -4,7 +4,7 @@
   "main": "dist/index.js",
   "scripts": {
     "build": "webpack",
-    "test": "webpack && sidevm-quickjs dist/index.js"
+    "test": "webpack && phatjs dist/index.js"
   },
   "license": "Apache-2.0",
   "dependencies": {

sidevm-quickjs/examples/gpt-openai-sdk/src/index.ts

@@ -12,7 +12,7 @@ async function main() {
         model: "gpt-3.5-turbo",
         messages: [{ role: "user", content: "Tell me a story" }],
     });
-    console.log('response:', response.data);
+    console.log('response:', JSON.stringify(response.data));
 }
 
-main().catch(console.error);
+main().catch(console.error).finally(() => process.exit());