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united-tattoo/docs/epic-deposit-payment-integration.md
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2025-09-25 23:53:54 -06:00

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Epic: Deposit Form & Payment Integration - Brownfield Enhancement

Epic Goal

Complete the deposit form functionality and integrate secure payment processing to enable online deposits for tattoo appointments, improving customer convenience and reducing manual payment handling.

Epic Description

Existing System Context:

  • Current booking system with deposit requirements
  • Existing user authentication and appointment management
  • Technology stack: Next.js, TypeScript, Tailwind CSS
  • Mobile-first user base (70% of bookings from mobile devices)

Enhancement Details:

  • Implement complete deposit form with client-side validation and error handling
  • Integrate Stripe payment processing using Embedded Elements for optimal UX and PCI compliance
  • Use inline payment form within booking flow to reduce abandonment
  • Implement immediate retry for transient payment failures with fallback to manual processing
  • Connect payment success to booking confirmation and email notifications
  • Add admin dashboard for payment tracking, reporting, and manual intervention
  • Store only payment reference IDs and status (no sensitive card data)
  • Success criteria: Reduce deposit processing time from 48hrs to <5min, achieve 95% payment success rate, process 80% of deposits online

Stories

  1. Story 1: Complete deposit form UI with validation and error handling
  2. Story 2: Integrate payment gateway API and handle payment processing
  3. Story 3: Connect payment success to booking confirmation and email notifications
  4. Story 4: Add admin payment tracking dashboard and reporting

Compatibility Requirements

  • Existing booking APIs remain unchanged
  • User authentication system integrates seamlessly
  • Database schema changes are backward compatible
  • UI follows existing design patterns
  • Performance impact is minimal (<200ms response time)

Risk Mitigation

  • Primary Risk: Payment security and PCI compliance
  • Mitigation: Use certified payment gateway, no sensitive data storage
  • Rollback Plan: Disable payment button, revert to manual deposit handling

Definition of Done

  • All stories completed with acceptance criteria met
  • Existing functionality verified through testing
  • Payment integration points working correctly
  • Security and compliance requirements met
  • No regression in existing booking features