Native Triple A Integration for FluxStore

Title: Develop a Native Triple A Payment Integration for FluxStore WooCommerce App
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1. Project Overview
We operate PopularVouchers.com, a WooCommerce-based digital voucher and gift card platform, with a mobile app built using FluxStore (Flutter).
Currently, our app uses the Multi-Payments WebView feature to handle payments, including Triple A crypto payments.
We want to upgrade to a native Triple A payment option, similar to how FluxStore has native PayPal support, to provide a smoother, mobile-first checkout experience.
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2. Objectives
• Build a native payment module in FluxStore for Triple A.
• Ensure secure and seamless integration with WooCommerce orders.
• Deliver a responsive, single-page checkout flow inside the app.
• Enable instant voucher delivery upon payment confirmation.
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3. Key Requirements
A. Triple A API Integration
• Integrate with Triple A Payment API using merchant credentials.
• Create backend service for OAuth authentication (client_id & client_secret must not be stored in the app).
• Implement endpoints:
o Create Payment Request
o Check Payment Status
o Handle Webhook Confirmation
B. WooCommerce Order Sync
• Create WooCommerce order with status Pending Payment before initiating payment.
• Update WooCommerce order to Processing/Completed once Triple A confirms payment.
• Handle failed/cancelled payments by marking the WooCommerce order accordingly.
C. Flutter App Development
• Add a “Pay with Triple A” button in the app checkout.
• Trigger native Triple A payment flow when selected.
• Display QR code or wallet details from Triple A API if required.
• Show success/failure screens inside the app.
• Fetch updated order status from WooCommerce automatically.
D. Backend Requirements
• Secure backend (can be a simple Node.js, PHP, or Python service) to:
o Request OAuth token from Triple A.
o Validate webhooks from Triple A.
o Relay payment confirmation to WooCommerce.
E. Security & Compliance
• Store API secrets on the backend only.
• HTTPS-only communication.
• Verify webhook signatures to prevent fraud.
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4. Deliverables
• Flutter Payment Plugin integrated into FluxStore app.
• Backend Service for token management & webhook handling.
• WooCommerce integration with automatic order updates.
• Testing in Sandbox & Live modes.
• Documentation including setup guide and admin instructions.
• Source code delivered via GitHub/Bitbucket.
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5. Skills Required
• Flutter (experience with FluxStore customization).
• WooCommerce REST API development.
• PHP/Node.js/Python backend development.
• Payment gateway API integrations.
• Experience with webhooks and secure token handling.
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6. Project Timeline
• Total Estimated Duration: 4–6 days
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7. Budget
Please provide proposals with fixed price.
Indicate prior experience with Flutter payment gateways or FluxStore apps.