Secure Android Flash USDT Transfer -- 2

I need an Android application that lets users move USDT quickly—often called a “flash” transfer—while keeping the process airtight. The core flow is simple: select amount, scan or paste the destination address, confirm, and broadcast. Speed matters, but security matters more.

My must-have is biometric authentication. Fingerprint or Face ID should guard both sign-in and the final “Send” button. If a device lacks biometrics, a basic PIN fallback is fine, yet biometrics remains the default experience.

Behind the scenes the app should
• connect to the Tron or TRC20 ,

TRC 20ERC-20 network (whichever the user chooses at runtime),
• display live fee estimates before confirmation,
• show transaction status until enough confirmations land.

I also expect standard protections—encrypted local storage, HTTPS for any remote calls, and obfuscation on build—implemented without extra prompting.

Deliverables
1. Signed APK ready for upload to Play Console’s internal track
2. Complete Android Studio project with readable, documented Kotlin or Java code

IMP IN NEED THIS IN SHORT TIME

3. One-page setup guide outlining build steps, key libraries, and how to swap API keys or RPC endpoints

I’ll test on a Pixel 7 Pro running Android 14; please confirm compatibility. Once the app cleanly installs, authenticates via biometrics, and completes a testnet USDT transfer, the job is done.