all_fintech_flutter_sdk

Fixed

• Fixed BulkChargeRequest toJson return type error
• Added platform support for better pub.dev scoring
• Resolved static analysis issues

Added

• Initial Release - Core SDK architecture
• Paystack Provider - Complete payment processing
  • Transaction initialization and verification
  • Transfer recipient management
  • Customer creation and management
  • Subscription handling
  • Webhook signature verification
• Flutterwave Provider - Multi-channel payments
  • Charge creation and processing
  • Virtual account management
  • Bank transfer operations
  • Customer management
• Opay Provider - Payment channel integration
  • Multiple payment methods (Card, Transfer, USSD)
  • Recurring payment setup
  • Real-time payment status
• Core Architecture
  • Dual service pattern (Data + UI)
  • Comprehensive error handling
  • Professional logging system
  • Type-safe models with JSON serialization
• Example Application - Comprehensive demo app
  • Provider-specific demo screens
  • Interactive payment flows
  • Error handling demonstrations

Technical

• Flutter 3.0+ compatibility
• Null safety implementation
• Material Design 3 UI components
• Enterprise security features
• Offline support with request queuing
• Circuit breaker patterns for resilience

Added

• Initial Release - Complete Flutter SDK for Nigerian fintech APIs
• Paystack Integration - Full API coverage with payments, transfers, customers, subscriptions
• Flutterwave Integration - Complete API support with charges, customers, transfers, virtual accounts
• Monnify Integration - OAuth 2.0 authentication with transactions, reserved accounts, transfers
• Opay Integration - Payment channels, transactions, recurring payments, refunds
• Open Banking Integration - Nigerian Open Banking API standard compliance with savings and accounts
• Dual Architecture - Data-only and UI-enabled operations for all providers
• Security Features - Signature verification, OAuth 2.0, webhook handling, encryption
• UI Components - Material Design 3 payment sheets, forms, dialogs, and management screens
• Enterprise Features - Offline support, circuit breaker patterns, enhanced error handling
• Type Safety - Complete Dart models with null safety support
• Production Ready - Comprehensive error handling and retry mechanisms

Security

• MD5/SHA-256 signature generation for API security
• OAuth 2.0 implementation for Monnify and Open Banking
• AES-256-CBC encryption for sensitive data
• Webhook signature verification
• Automatic token refresh and management

Documentation

• Comprehensive README with examples for all providers
• API documentation with detailed usage patterns
• Code examples for both data-only and UI operations
• Migration guides and best practices

Supported Providers

• Paystack (Payments, Transfers, Customers, Subscriptions, Products)
• Flutterwave (Charges, Customers, Transfers, Virtual Accounts, Orders)
• Monnify (Transactions, Reserved Accounts, Transfers, Banking)
• Opay (Payments, Channels, Recurring, Refunds)
• Open Banking Nigeria (Savings, Accounts, Transactions)

Technical Features

• Flutter 3.0+ compatibility
• Null safety support
• Material Design 3 UI components
• Offline request queuing
• Circuit breaker pattern implementation
• Enhanced exception handling
• Webhook management system
• Idempotency support
• Pagination handling
• Custom properties support