Log Telegram receipt photos to Google Sheets with Gemini expense extraction

## AI Receipt Processor ### How it works This workflow lets users send receipt photos or documents to a Telegram bot. Gemini extracts the vendor, amount, date, expense category, payment method, and confidence score. High-confidence expenses are saved directly to Google Sheets. Low-confidence expenses are stored temporarily in an n8n Data Table and the user is asked to confirm or change the category in Telegram. ### Requirements - Telegram bot credentials - Google Gemini credentials - Google Sheets credentials - an n8n Data Table named pending_expenses - a Google Sheet for storing expenses ### Setup steps 1. Connect Telegram credentials to the trigger and all Telegram nodes. 2. Connect Google Gemini credentials to both Gemini nodes and select a Gemini model. 3. Make a copy of the provided Expense template and select it in all three Google Sheets nodes - https://docs.google.com/spreadsheets/d/129ZEubOfaVA1pOjbVCb9GgZQXbC48XTGpH7Zve5hBU0/edit?usp=sharing 4. Map these Google Sheets columns: - Date - Vendor - Amount - Payment type - Expense Category 5. Create an n8n Data Table named pending_expenses with: - request_id — Number - resume_url — String - vendor — String - amount — Number - date — Date/Time - category — String - payment_method — String 6. Select this Data Table in all Data Table nodes. 7. If you are self-hosting n8n, ensure your instance is publicly reachable for Telegram updates and wait/resume URLs. 8. Activate the workflow and send a receipt photo or document to your Telegram bot. ### Customization You can customize the confidence threshold, Gemini extraction prompt, expense categories, Telegram messages, Google Sheets columns, and category confirmation buttons. The default confidence threshold is 0.65. The default categories are Food, Transport, Shopping, Services, and Other.