Flash USDT Sender

A secure Android application for USDT cryptocurrency transactions with flash sending capabilities and multi-network support. Our app allows you to send and receive various cryptocurrencies across multiple blockchain networks with enhanced privacy and security features.

🚀 Features

Core Functionality

• USDT Transactions: Send and receive USDT on multiple blockchain networks
• Flash USDT Sender: Instant USDT transfers with priority processing
• Multi-Network Support: Ethereum, Polygon, BSC, Arbitrum, Optimism
• QR Code Integration: Easy address sharing and payment requests
• Transaction History: Complete transaction tracking and management

Security Features

• Biometric Authentication: Fingerprint and face recognition support
• Secure Wallet Management: Encrypted private keys and secure storage
• Device Security Checks: Root detection and tampering protection
• Secure Transaction Signing: Client-side transaction signing
• Memory Protection: Best-effort sensitive data clearing

User Experience

• Modern Material Design 3: Clean and intuitive interface
• Real-time Balance Updates: Live balance and transaction status
• Network Status Monitoring: Network connectivity and performance
• Swipe-to-Refresh: Easy data refresh with pull-to-refresh
• Bottom Navigation: Quick access to main features

💰 Pricing Plans

Choose the plan that best fits your needs. All plans include a one-time payment with lifetime access to Flash USDT Sender.

🥉 Basic

Essential features for beginners

• Multi-network support
• Basic security features
• Email support
• Regular updates
• Single device license

$250 one-time

🥈 Professional

Advanced features for serious users

• Multi-network support
• Advanced security features
• 24/7 priority support
• Regular updates
• Multiple device license
• Transaction anonymity
• Custom transaction routing

$250 one-time MOST POPULAR

🥇 Enterprise

Custom solutions for businesses

• All Professional features
• Dedicated account manager
• Custom integration support
• API access
• Unlimited devices
• Advanced analytics
• Custom branding options

$250 one-time Contact Sales

🎯 Access & Verification

Get Your App Access

After payment, you'll receive instant access to all features through our secure verification system:

🔗 Verify Your Payment

What You'll Get After Payment

• ✅ Instant access to all features
• ✅ Secure end-to-end encryption and payment processing
• ✅ 90-day transaction validity for maximum utility
• ✅ 24/7 professional support
• ✅ Regular updates and new features
• ✅ Blockchain verification for all transactions

🏗️ Architecture

Technology Stack

• Language: Kotlin
• Framework: Android SDK
• UI: Material Design 3, ViewBinding, DataBinding
• Architecture: MVVM (Model-View-ViewModel)
• Database: Room (SQLite)
• Networking: Retrofit 2, OkHttp3
• Crypto: Web3j, BouncyCastle
• Security: Android Security, Biometric

Project Structure

app/
├── data/           # Data layer (Database, Repository)
├── ui/            # UI layer (Activities, Fragments, ViewModels)
├── utilities/     # Utility classes (Security, Crypto, Network)
├── service/       # Background services
├── models/        # Data models
└── resources/     # Layouts, styles, strings

🛠️ Setup Instructions

Prerequisites

1. Android Studio: Latest stable version
2. Java 17: Required for Android development
3. Android SDK: API level 21+ (minimum), API level 34+ (target)
4. Git: For version control

Development Setup

1. Clone the repository

   git clone https://github.com/YOUR_USERNAME/flash-usdt-sender.git
   cd flash-usdt-sender

2. Open in Android Studio

   • Launch Android Studio
   • Select "Open an existing Android Studio project"
   • Navigate to the cloned repository and select it

3. Configure build dependencies

   • The project uses Gradle for dependency management
   • All required dependencies are configured in app/build.gradle

4. Set up signing configuration

   • Create a keystore for release builds
   • Add signing configuration to app/build.gradle
   • Configure GitHub Secrets for release builds

Configuration

1. Update API endpoints

   • Modify BuildConfig.API_BASE_URL in app/build.gradle
   • Update network configurations in code

2. Configure security settings

   • Update trusted app signatures in SecurityUtils
   • Configure biometric authentication settings

3. Set up blockchain networks

   • Configure RPC URLs for each supported network
   • Update USDT contract addresses

🔒 Security Considerations

App Security Features

• Root Detection: Prevents operation on rooted devices
• Debug Detection: Blocks debug builds in production
• Signature Validation: Ensures app integrity
• Emulator Detection: Blocks operation on emulators
• Tampering Detection: Monitors for app modifications

Data Protection

• Encrypted Storage: Sensitive data encrypted with AES-256
• Secure Communication: TLS/SSL for all network requests
• Memory Clearing: Best-effort sensitive data clearing
• Key Derivation: PBKDF2 for password-based key derivation

User Privacy

• No Personal Data Collection: App operates locally
• Transaction Privacy: Direct blockchain interactions
• Secure Backup: Encrypted wallet backups

📱 Usage

Basic Operations

1. Create/Import Wallet

   • Open app → Create new wallet or import existing
   • Secure wallet with biometric authentication

2. Send USDT

   • Tap "Send" button or scan QR code
   • Enter recipient address and amount
   • Select network and confirm transaction

3. Flash USDT (Instant Send)

   • Enable flash sending in settings
   • Select high priority for instant processing
   • Pay premium fee for faster confirmation

4. Receive USDT

   • Share your wallet address or QR code
   • Receive payments from other wallets

Advanced Features

• Batch Sending: Send to multiple recipients
• Transaction History: View all past transactions
• Network Switching: Change blockchain network
• Custom Gas Fees: Set custom gas prices
• Backup & Export: Secure wallet backup

🚀 Deployment

GitHub Actions CI/CD

The project includes automated CI/CD pipeline:

1. Build Pipeline

   • ✅ Code quality checks
   • ✅ Unit tests
   • ✅ Security scanning
   • ✅ APK building
   • ✅ Automated releases

2. Release Process

   • Triggered on main branch commits
   • Creates signed release builds
   • Uploads to GitHub Releases
   • Automated notification

Manual Build

1. Debug Build

   ./gradlew assembleDebug

2. Release Build

   ./gradlew assembleRelease

3. Testing

   ./gradlew test
   ./gradlew connectedAndroidTest

🧪 Testing

Test Coverage

• Unit Tests: Core functionality testing
• Integration Tests: API and database testing
• Security Tests: Authentication and encryption
• UI Tests: User interface testing

Running Tests

# Unit tests
./gradlew test

# Instrumented tests
./gradlew connectedAndroidTest

# All tests
./gradlew check

🔧 Development Guidelines

Code Standards

• Kotlin Style Guide: Follow official Kotlin coding standards
• Architecture: MVVM pattern with clean architecture principles
• Naming: Clear, descriptive naming conventions
• Comments: Comprehensive inline documentation
• Error Handling: Robust error handling and logging

Security Guidelines

• Input Validation: All user inputs validated
• Secure Storage: Sensitive data properly encrypted
• Network Security: All communications encrypted
• Code Review: Security-focused code reviews
• Penetration Testing: Regular security assessments

Performance Guidelines

• Memory Management: Efficient memory usage
• Network Optimization: Minimal network requests
• UI Performance: Smooth, responsive interface
• Battery Optimization: Minimal battery usage
• Storage Efficiency: Optimized data storage

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

⚠️ Disclaimer

This is a financial application that handles cryptocurrency transactions. Users are responsible for:

• Securing their private keys
• Verifying transaction details
• Understanding blockchain risks
• Following local regulations

Use at your own risk. The developers are not responsible for any financial losses.

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Commit your changes
4. Push to the branch
5. Create a Pull Request

Development Process

• Follow code style guidelines
• Add tests for new features
• Update documentation
• Ensure all tests pass
• Security review required

📞 Support & Community

Get Help

• Telegram Community: Join ScriptersShop - Connect with users and get community support
• Development Team: RecentCoders - Get technical support and updates
• Documentation: Check the wiki for detailed guides
• Issues: Report bugs and feature requests
• Security: Report security vulnerabilities privately

Community Features

• 💬 Real-time discussion and support
• 📚 Educational content and tutorials
• 🔧 Technical support from developers
• 📢 Updates and announcements
• 🛡️ Security tips and best practices

Note: The community was moved to ScriptersShop. Join our new discussion!

🔄 Version History

v1.0.0 (Current)

• Initial release
• Basic USDT sending/receiving
• Multi-network support
• Biometric authentication
• Flash USDT sending
• GitHub Actions CI/CD

Upcoming Features

• Batch transaction support
• Advanced gas optimization
• DeFi protocol integration
• Multi-language support
• Hardware wallet integration
• Advanced analytics

🏆 Acknowledgments

• Material Design team for UI components
• Web3j library for blockchain interactions
• Android Security team for security guidance
• Open source community for tools and libraries
• Development Team: RecentCoders for app development and optimization
• Community: ScriptersShop for feedback and support

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🔗 Quick Links

• 📱 Download App - Verify payment and get access
• 💬 Community - Join our Telegram community
• 🛠️ Development - Technical support and updates
• 🐛 Issues - Report bugs or request features
• 📖 Documentation - Detailed guides and tutorials

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