Added a Telegram bot starter example (#84)

# Pull Request Description
Added a Telegram bot starter example, with steps on how to run and host
it successfully.

## Related Issue
Fixes #83 

## Changes Made
This PR adds the following changes:
- Adds an example on how we can use agent kit in a telegram bot using
nextjs
- 
  
## Implementation Details
- Used next js and ngrok or vercel to host the bot and telegram bot api
to have it.

## Transaction executed by agent 
Yes it is able to do everything.

## Prompt Used
NA

## Additional Notes
NA

## Checklist
- [ x  ] I have tested these changes locally

examples/tg-bot-starter/.env.example

@@ -0,0 +1,4 @@
+OPENAI_API_KEY=
+RPC_URL=
+SOLANA_PRIVATE_KEY=
+TELEGRAM_BOT_TOKEN=

examples/tg-bot-starter/.gitignore

@@ -0,0 +1,41 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

examples/tg-bot-starter/README.md

@@ -0,0 +1,22 @@
+
+# Telegram Bot Starter with Solana Agent Kit
+
+This example showcases how we can make a telegram bot with the Solana Agent Kit by Send AI.
+
+## How to get the telegram bot token
+
+You can check [here](https://help.zoho.com/portal/en/kb/desk/support-channels/instant-messaging/telegram/articles/telegram-integration-with-zoho-desk#How_to_find_a_token_for_an_existing_Telegram_Bot) how you can obtain a bot token for your telegram bot.
+
+## How to setup the project
+
+- Set env variables
+- Run ``` pnpm install ```
+- Run ``` pnpm run dev ``` 
+- Run ``` ngrok http 3000 ```
+- With the URL you got from ngrok, where your bot is hosted at https://yourUrl.app/api/bot 
+- Set the webhook by using this command ``` curl https://api.telegram.org/bot<telegram_bot_token>/setWebhook?url=https://<your-deployment-url>.app/api/bot ``` or simply clicking on that link.
+- You can host it on Vercel too as we have used NextJs in this.
+- Once the URL is set successfully, you will see this ``` {"ok":true,"result":true,"description":"Webhook was set"} ```
+
+Done!!! Congrtulations you just hosted Solana Agent Kit on a Telegram bot.
+

examples/tg-bot-starter/next.config.ts

@@ -0,0 +1,7 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  /* config options here */
+};
+
+export default nextConfig;

examples/tg-bot-starter/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "tg-bot-starter",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@langchain/core": "^0.3.26",
+    "@langchain/langgraph": "^0.2.36",
+    "@langchain/openai": "^0.3.16",
+    "grammy": "^1.33.0",
+    "messages": "link:@langchain/core/messages",
+    "next": "15.1.3",
+    "prebuilt": "link:@langchain/langgraph/prebuilt",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "solana-agent-kit": "^1.3.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "postcss": "^8",
+    "tailwindcss": "^3.4.1",
+    "typescript": "^5"
+  }
+}

examples/tg-bot-starter/postcss.config.mjs

@@ -0,0 +1,8 @@
+/** @type {import('postcss-load-config').Config} */
+const config = {
+  plugins: {
+    tailwindcss: {},
+  },
+};
+
+export default config;

examples/tg-bot-starter/public/file.svg

@@ -0,0 +1 @@
+<svg fill="none" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="M14.5 13.5V5.41a1 1 0 0 0-.3-.7L9.8.29A1 1 0 0 0 9.08 0H1.5v13.5A2.5 2.5 0 0 0 4 16h8a2.5 2.5 0 0 0 2.5-2.5m-1.5 0v-7H8v-5H3v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1M9.5 5V2.12L12.38 5zM5.13 5h-.62v1.25h2.12V5zm-.62 3h7.12v1.25H4.5zm.62 3h-.62v1.25h7.12V11z" clip-rule="evenodd" fill="#666" fill-rule="evenodd"/></svg>

examples/tg-bot-starter/public/globe.svg

@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><g clip-path="url(#a)"><path fill-rule="evenodd" clip-rule="evenodd" d="M10.27 14.1a6.5 6.5 0 0 0 3.67-3.45q-1.24.21-2.7.34-.31 1.83-.97 3.1M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16m.48-1.52a7 7 0 0 1-.96 0H7.5a4 4 0 0 1-.84-1.32q-.38-.89-.63-2.08a40 40 0 0 0 3.92 0q-.25 1.2-.63 2.08a4 4 0 0 1-.84 1.31zm2.94-4.76q1.66-.15 2.95-.43a7 7 0 0 0 0-2.58q-1.3-.27-2.95-.43a18 18 0 0 1 0 3.44m-1.27-3.54a17 17 0 0 1 0 3.64 39 39 0 0 1-4.3 0 17 17 0 0 1 0-3.64 39 39 0 0 1 4.3 0m1.1-1.17q1.45.13 2.69.34a6.5 6.5 0 0 0-3.67-3.44q.65 1.26.98 3.1M8.48 1.5l.01.02q.41.37.84 1.31.38.89.63 2.08a40 40 0 0 0-3.92 0q.25-1.2.63-2.08a4 4 0 0 1 .85-1.32 7 7 0 0 1 .96 0m-2.75.4a6.5 6.5 0 0 0-3.67 3.44 29 29 0 0 1 2.7-.34q.31-1.83.97-3.1M4.58 6.28q-1.66.16-2.95.43a7 7 0 0 0 0 2.58q1.3.27 2.95.43a18 18 0 0 1 0-3.44m.17 4.71q-1.45-.12-2.69-.34a6.5 6.5 0 0 0 3.67 3.44q-.65-1.27-.98-3.1" fill="#666"/></g><defs><clipPath id="a"><path fill="#fff" d="M0 0h16v16H0z"/></clipPath></defs></svg>

examples/tg-bot-starter/public/next.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 394 80"><path fill="#000" d="M262 0h68.5v12.7h-27.2v66.6h-13.6V12.7H262V0ZM149 0v12.7H94v20.4h44.3v12.6H94v21h55v12.6H80.5V0h68.7zm34.3 0h-17.8l63.8 79.4h17.9l-32-39.7 32-39.6h-17.9l-23 28.6-23-28.6zm18.3 56.7-9-11-27.1 33.7h17.8l18.3-22.7z"/><path fill="#000" d="M81 79.3 17 0H0v79.3h13.6V17l50.2 62.3H81Zm252.6-.4c-1 0-1.8-.4-2.5-1s-1.1-1.6-1.1-2.6.3-1.8 1-2.5 1.6-1 2.6-1 1.8.3 2.5 1a3.4 3.4 0 0 1 .6 4.3 3.7 3.7 0 0 1-3 1.8zm23.2-33.5h6v23.3c0 2.1-.4 4-1.3 5.5a9.1 9.1 0 0 1-3.8 3.5c-1.6.8-3.5 1.3-5.7 1.3-2 0-3.7-.4-5.3-1s-2.8-1.8-3.7-3.2c-.9-1.3-1.4-3-1.4-5h6c.1.8.3 1.6.7 2.2s1 1.2 1.6 1.5c.7.4 1.5.5 2.4.5 1 0 1.8-.2 2.4-.6a4 4 0 0 0 1.6-1.8c.3-.8.5-1.8.5-3V45.5zm30.9 9.1a4.4 4.4 0 0 0-2-3.3 7.5 7.5 0 0 0-4.3-1.1c-1.3 0-2.4.2-3.3.5-.9.4-1.6 1-2 1.6a3.5 3.5 0 0 0-.3 4c.3.5.7.9 1.3 1.2l1.8 1 2 .5 3.2.8c1.3.3 2.5.7 3.7 1.2a13 13 0 0 1 3.2 1.8 8.1 8.1 0 0 1 3 6.5c0 2-.5 3.7-1.5 5.1a10 10 0 0 1-4.4 3.5c-1.8.8-4.1 1.2-6.8 1.2-2.6 0-4.9-.4-6.8-1.2-2-.8-3.4-2-4.5-3.5a10 10 0 0 1-1.7-5.6h6a5 5 0 0 0 3.5 4.6c1 .4 2.2.6 3.4.6 1.3 0 2.5-.2 3.5-.6 1-.4 1.8-1 2.4-1.7a4 4 0 0 0 .8-2.4c0-.9-.2-1.6-.7-2.2a11 11 0 0 0-2.1-1.4l-3.2-1-3.8-1c-2.8-.7-5-1.7-6.6-3.2a7.2 7.2 0 0 1-2.4-5.7 8 8 0 0 1 1.7-5 10 10 0 0 1 4.3-3.5c2-.8 4-1.2 6.4-1.2 2.3 0 4.4.4 6.2 1.2 1.8.8 3.2 2 4.3 3.4 1 1.4 1.5 3 1.5 5h-5.8z"/></svg>

examples/tg-bot-starter/public/vercel.svg

@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1155 1000"><path d="m577.3 0 577.4 1000H0z" fill="#fff"/></svg>

examples/tg-bot-starter/public/window.svg

@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><path fill-rule="evenodd" clip-rule="evenodd" d="M1.5 2.5h13v10a1 1 0 0 1-1 1h-11a1 1 0 0 1-1-1zM0 1h16v11.5a2.5 2.5 0 0 1-2.5 2.5h-11A2.5 2.5 0 0 1 0 12.5zm3.75 4.5a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5M7 4.75a.75.75 0 1 1-1.5 0 .75.75 0 0 1 1.5 0m1.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5" fill="#666"/></svg>

examples/tg-bot-starter/src/app/api/bot/route.ts

@@ -0,0 +1,86 @@
+export const dynamic = 'force-dynamic';
+export const fetchCache = 'force-no-store';
+export const maxDuration = 300;
+
+import { Bot, webhookCallback } from 'grammy';
+import { SolanaAgentKit, createSolanaTools } from "solana-agent-kit";
+import { ChatOpenAI } from "@langchain/openai";
+import { MemorySaver } from "@langchain/langgraph";
+import { createReactAgent } from "@langchain/langgraph/prebuilt";
+import { HumanMessage } from "@langchain/core/messages";
+
+const token = process.env.TELEGRAM_BOT_TOKEN;
+if (!token) throw new Error('TELEGRAM_BOT_TOKEN environment variable not found.');
+const bot = new Bot(token);
+
+
+async function initializeAgent(userId: string) {
+  try {
+    const llm = new ChatOpenAI({
+      modelName: "gpt-4o-mini",
+      temperature: 0.7,
+    });
+
+    const solanaKit = new SolanaAgentKit(
+      process.env.SOLANA_PRIVATE_KEY!,
+      process.env.RPC_URL,
+      process.env.OPENAI_API_KEY!
+    );
+
+    const tools = createSolanaTools(solanaKit);
+    const memory = new MemorySaver();
+    const config = { configurable: { thread_id: userId } };
+    const agent = createReactAgent({
+      llm,
+      tools,
+      checkpointSaver: memory,
+      messageModifier: `
+        You are a helpful agent that can interact onchain using the Solana Agent Kit. You are
+        empowered to interact onchain using your tools. If you ever need funds, you can request them from the
+        faucet. If not, you can provide your wallet details and request funds from the user. If there is a 5XX
+        (internal) HTTP error code, ask the user to try again later. If someone asks you to do something you
+        can't do with your currently available tools, you must say so, and encourage them to implement it
+        themselves using the Solana Agent Kit, recommend they go to https://www.solanaagentkit.xyz for more information. Be
+        concise and helpful with your responses. Refrain from restating your tools' descriptions unless it is explicitly requested.
+      `,
+    });
+    return { agent, config };
+  } catch (error) {
+    console.error("Failed to initialize agent:", error);
+    throw error;
+  }
+}
+// Telegram bot handler
+bot.on('message:text', async (ctx:any) => {
+  const userId = ctx.from?.id.toString();
+  if (!userId) return;
+  const {agent, config} = await initializeAgent(userId);
+  const stream = await agent.stream({ messages: [new HumanMessage(ctx.message.text)] }, config);
+  const timeoutPromise = new Promise((_, reject) => setTimeout(() => reject(new Error('Timeout')), 20000));
+  try {
+    for await (const chunk of await Promise.race([stream, timeoutPromise]) as AsyncIterable<{ agent?: any; tools?: any }>) {
+      if ("agent" in chunk) {
+        if (chunk.agent.messages[0].content) await ctx.reply(String(chunk.agent.messages[0].content));
+      } 
+    }
+  } catch (error: any) {
+    if (error.message === 'Timeout') {
+      await ctx.reply("I'm sorry, the operation took too long and timed out. Please try again.");
+    } else {
+      console.error("Error processing stream:", error);
+      await ctx.reply("I'm sorry, an error occurred while processing your request.");
+    }
+  }
+});
+
+// Export webhook handler
+export const POST = async (req: Request) => {
+  // Mark the function as a background function for Vercel
+  const headers = new Headers();
+  headers.set('x-vercel-background', 'true');
+
+  const handler = webhookCallback(bot, 'std/http'); // Use the correct callback
+
+  // Handle the incoming webhook request
+  return handler(req);
+};

examples/tg-bot-starter/src/app/globals.css

@@ -0,0 +1,21 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+:root {
+  --background: #ffffff;
+  --foreground: #171717;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --background: #0a0a0a;
+    --foreground: #ededed;
+  }
+}
+
+body {
+  color: var(--foreground);
+  background: var(--background);
+  font-family: Arial, Helvetica, sans-serif;
+}

examples/tg-bot-starter/src/app/layout.tsx

@@ -0,0 +1,34 @@
+import type { Metadata } from "next";
+import { Geist, Geist_Mono } from "next/font/google";
+import "./globals.css";
+
+const geistSans = Geist({
+  variable: "--font-geist-sans",
+  subsets: ["latin"],
+});
+
+const geistMono = Geist_Mono({
+  variable: "--font-geist-mono",
+  subsets: ["latin"],
+});
+
+export const metadata: Metadata = {
+  title: "Create Next App",
+  description: "Generated by create next app",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <body
+        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
+      >
+        {children}
+      </body>
+    </html>
+  );
+}

examples/tg-bot-starter/src/app/page.tsx

@@ -0,0 +1,101 @@
+import Image from "next/image";
+
+export default function Home() {
+  return (
+    <div className="grid grid-rows-[20px_1fr_20px] items-center justify-items-center min-h-screen p-8 pb-20 gap-16 sm:p-20 font-[family-name:var(--font-geist-sans)]">
+      <main className="flex flex-col gap-8 row-start-2 items-center sm:items-start">
+        <Image
+          className="dark:invert"
+          src="/next.svg"
+          alt="Next.js logo"
+          width={180}
+          height={38}
+          priority
+        />
+        <ol className="list-inside list-decimal text-sm text-center sm:text-left font-[family-name:var(--font-geist-mono)]">
+          <li className="mb-2">
+            Get started by editing{" "}
+            <code className="bg-black/[.05] dark:bg-white/[.06] px-1 py-0.5 rounded font-semibold">
+              src/app/page.tsx
+            </code>
+            .
+          </li>
+          <li>Save and see your changes instantly.</li>
+        </ol>
+
+        <div className="flex gap-4 items-center flex-col sm:flex-row">
+          <a
+            className="rounded-full border border-solid border-transparent transition-colors flex items-center justify-center bg-foreground text-background gap-2 hover:bg-[#383838] dark:hover:bg-[#ccc] text-sm sm:text-base h-10 sm:h-12 px-4 sm:px-5"
+            href="https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
+            <Image
+              className="dark:invert"
+              src="/vercel.svg"
+              alt="Vercel logomark"
+              width={20}
+              height={20}
+            />
+            Deploy now
+          </a>
+          <a
+            className="rounded-full border border-solid border-black/[.08] dark:border-white/[.145] transition-colors flex items-center justify-center hover:bg-[#f2f2f2] dark:hover:bg-[#1a1a1a] hover:border-transparent text-sm sm:text-base h-10 sm:h-12 px-4 sm:px-5 sm:min-w-44"
+            href="https://nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
+            Read our docs
+          </a>
+        </div>
+      </main>
+      <footer className="row-start-3 flex gap-6 flex-wrap items-center justify-center">
+        <a
+          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
+          href="https://nextjs.org/learn?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <Image
+            aria-hidden
+            src="/file.svg"
+            alt="File icon"
+            width={16}
+            height={16}
+          />
+          Learn
+        </a>
+        <a
+          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
+          href="https://vercel.com/templates?framework=next.js&utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <Image
+            aria-hidden
+            src="/window.svg"
+            alt="Window icon"
+            width={16}
+            height={16}
+          />
+          Examples
+        </a>
+        <a
+          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
+          href="https://nextjs.org?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <Image
+            aria-hidden
+            src="/globe.svg"
+            alt="Globe icon"
+            width={16}
+            height={16}
+          />
+          Go to nextjs.org →
+        </a>
+      </footer>
+    </div>
+  );
+}

examples/tg-bot-starter/tailwind.config.ts

@@ -0,0 +1,18 @@
+import type { Config } from "tailwindcss";
+
+export default {
+  content: [
+    "./src/pages/**/*.{js,ts,jsx,tsx,mdx}",
+    "./src/components/**/*.{js,ts,jsx,tsx,mdx}",
+    "./src/app/**/*.{js,ts,jsx,tsx,mdx}",
+  ],
+  theme: {
+    extend: {
+      colors: {
+        background: "var(--background)",
+        foreground: "var(--foreground)",
+      },
+    },
+  },
+  plugins: [],
+} satisfies Config;

examples/tg-bot-starter/tsconfig.json

@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "exclude": ["node_modules"]
+}