### Download Gotgbot Library

Source: https://github.com/paulsonoflars/gotgbot/blob/v2/README.md

Use this command to download the library using the standard Go get command.

```bash
go get github.com/PaulSonOfLars/gotgbot/v2
```

--------------------------------

### Setup ngrok for Webhook Development

Source: https://github.com/paulsonoflars/gotgbot/blob/v2/samples/README.md

Instructions for setting up ngrok to tunnel HTTP traffic for webhook development. This command forwards traffic to port 8080.

```bash
ngrok http 8080

```

--------------------------------

### Validate Telegram Init Data with Backend

Source: https://github.com/paulsonoflars/gotgbot/blob/v2/samples/webappBot/index.html

For any input, always pass the initData string, which will be validated by the backend. This example uses fetch to send the data and display the result.

```javascript
// For any input, we must always pass the initData string, which will be validated by the backend.
fetch("{{ .WebAppURL }}/validate", { headers: { "X-Auth": Telegram.WebApp.initData } }).then(function (response) { return response.text(); }).then(function (text) { document.getElementById("valid").innerHTML = "result: " + text; }).catch(function () { console.log("Booo"); });
```

--------------------------------

### Run Webapp Bot

Source: https://github.com/paulsonoflars/gotgbot/blob/v2/samples/README.md

Demonstrates how to serve a webapp using the gotgbot library. Requires setting URL and TOKEN environment variables. Recommended for development with ngrok.

```bash
URL="<your_url_here>" TOKEN="<your_token_here>" go run .

```

--------------------------------

### Run Echo Webhook Bot

Source: https://github.com/paulsonoflars/gotgbot/blob/v2/samples/README.md

Demonstrates how to run an echo bot using webhooks. Requires setting a TOKEN, WEBHOOK_DOMAIN, and WEBHOOK_SECRET environment variables. Recommended for development with ngrok.

```bash
TOKEN="<your_token_here>" WEBHOOK_DOMAIN="<your_domain_here>"  WEBHOOK_SECRET="<random_string_here>" go run .

```

--------------------------------

### Initialize and Display Telegram User Data

Source: https://github.com/paulsonoflars/gotgbot/blob/v2/samples/webappBot/index.html

Use Telegram.WebApp.ready() to ensure the frontend is ready. Display 'unsafe' data directly, but always validate input data on the backend.

```javascript
Telegram.WebApp.ready()
// The frontend is OK displaying "unsafe" data, as long as we only use it for display reasons, and not as input.
document.getElementById("name").innerHTML = "your name is: " + Telegram.WebApp.initDataUnsafe.user.first_name
document.getElementById("id").innerHTML = "your id is: " + Telegram.WebApp.initDataUnsafe.user.id
```

--------------------------------

### Regenerate Library Code

Source: https://github.com/paulsonoflars/gotgbot/blob/v2/README.md

Run 'go generate' from the repository root to regenerate the library code from the specification. To upgrade the commit in 'spec_commit' and regenerate, use 'GOTGBOT_UPGRADE=true go generate'.

```bash
go generate
```

```bash
GOTGBOT_UPGRADE=true go generate
```

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