Automated Invoice Generation and Email Workflow

This n8n workflow automates the entire process of generating, storing, and emailing invoices based on customer data received via a webhook. It starts with a webhook trigger that simulates an order creation event, including customer details and purchased products. The workflow then generates a unique invoice ID, checking against existing records in Google Sheets to prevent duplicates. If the ID is new, it constructs a detailed HTML invoice, converts it into a PDF using an external API, and uploads the PDF to Google Drive. Subsequently, it sends a professional invoice email to the customer with a payment link and updates the invoice record in Google Sheets with relevant details such as invoice ID, URL, amount, and status. This workflow streamlines invoice management, reduces manual effort, and ensures timely communication with customers, making it ideal for eCommerce or service-based businesses.