Generate AI images via Telegram with WaveSpeed, credit system, PIX and S3

🤖 Generate images via Telegram using an AI bot with a credit system and S3 storage

A complete, production-ready Telegram bot for AI-powered image generation and editing, featuring a built-in credit system, payment integration, and cloud storage.

✨ Features

🎨 AI Image Generation Text-to-Image: Generate stunning images from text prompts using the Nano Banana Pro Ultra model via WaveSpeed API Image-to-Image Editing: Edit existing images by sending a photo with a caption describing the desired changes Multiple Resolutions: Support for both 4K and 8K output quality Flexible Aspect Ratios: Choose from 10 different aspect ratios (1:1, 3:2, 2:3, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9)

💳 Credit Management System Per-generation billing**: Different costs for 4K vs 8K resolution Balance tracking**: Real-time credit balance displayed to users Initial credits**: New users receive starter credits automatically Insufficient balance handling**: Graceful messages when credits run out

Here's the adjusted payment section:

💰 Payment Integration (Mercado Pago PIX)

> About PIX: PIX is Brazil's instant payment system, launched by the Central Bank of Brazil in 2020. It allows instant money transfers 24/7, 365 days a year, using QR codes or copy-paste codes. It has become the most popular payment method in Brazil due to its speed and zero fees for individuals.

This workflow includes a fully integrated PIX payment flow as a reference implementation. You can adapt it to your local payment provider.

Features: Multiple deposit options**: Pre-configured credit packages (R$ 3, R$ 6, R$ 10) QR Code generation**: Automatic PIX QR code sent directly to users via Telegram Copy-paste code**: PIX code provided for manual payment Webhook confirmation**: Real-time payment status updates via Mercado Pago webhooks Auto credit top-up**: Credits added automatically upon payment approval Payment status handling**: Supports approved, pending, and rejected states

> 💡 Tip: To adapt this for other regions, replace the Mercado Pago nodes with your preferred payment gateway (Stripe, PayPal, etc.) while keeping the same credit update logic.

⚙️ User Configuration Resolution settings**: Users can set their preferred default resolution Aspect ratio preferences**: Save preferred aspect ratio for future generations Custom default prompts**: Set a default prompt that's automatically appended to all generations Persistent settings**: All preferences stored in n8n Data Tables

📦 Cloud Storage (S3/MinIO) Automatic upload**: Generated images are automatically uploaded to S3-compatible storage Persistent URLs**: Images remain accessible via permanent links Edit from storage**: Reference previously uploaded images for editing

🛠️ Tech Stack

| Component | Technology | |-----------|------------| | Bot Platform | Telegram Bot API | | AI Generation | WaveSpeed API (Nano Banana Pro) | | Storage | S3-compatible (MinIO/AWS S3) | | Database | n8n Data Tables | | Payments | Mercado Pago PIX | | Automation | n8n |

📋 Prerequisites

Before using this workflow, you'll need:

Telegram Bot Token - Create a bot via @BotFather WaveSpeed API Key - Sign up at WaveSpeed S3-compatible Storage - MinIO, AWS S3, or any S3-compatible service Mercado Pago Account (optional) - For payment integration n8n Data Table - Create a table with the required schema

📊 Data Table Schema

Create a Data Table with the following columns:

| Column | Type | Description | |--------|------|-------------| | chat_id | String | Telegram chat ID (primary key) | | username | String | Telegram username | | status | String | Current user state in the flow | | credits | String | User's credit balance | | resolution | String | Preferred resolution (4k/8k) | | aspect_ratio | String | Preferred aspect ratio | | user_default_prompt | String | Custom default prompt | | number_images | Number | Total images generated | | number_videos | Number | Total videos generated | | demo_sended | Boolean | Welcome demo sent flag |

⚡ Quick Setup

Import the workflow into your n8n instance Configure the Global Environment node with your settings: botName: Your bot's display name botToken: Your Telegram bot token dataTableId: Your n8n Data Table ID bucketName: Your S3 bucket name initialCredits: Credits given to new users generateImageCost4k: Cost per 4K image generateImageCost8k: Cost per 8K image Set up credentials: Telegram API credentials WaveSpeed API credentials S3 credentials Mercado Pago credentials (if using payments) Activate the workflow

🎮 Bot Commands

| Command | Description | |---------|-------------| | /start | Initialize bot and receive welcome message | | menu | Return to main menu | | config | Open settings menu | | Any text | Generate image from prompt (when in generation mode) | | Photo + caption | Edit the photo based on the caption |

🔄 Workflow Flow

User Message → Telegram Trigger → Route by Status ↓ ┌───────────────────┼───────────────────┐ ↓ ↓ ↓ New User Generate Image Edit Image ↓ ↓ ↓ Welcome Flow Check Credits Check Credits ↓ ↓ ↓ Create User Submit to WaveSpeed Upload to S3 ↓ ↓ ↓ Show Menu Poll for Result Submit Edit ↓ ↓ Download Image Poll for Result ↓ ↓ Send to User ←←←←←←←←←←←←←┘

📝 Notes

The workflow uses polling to check generation status - WaveSpeed processes may take up to 1 minute Credits are deducted when the task is submitted and refunded if generation fails All user states are managed through the Data Table for persistence across restarts

📄 License

Free to use and modify. Attribution appreciated but not required.