ProofOfFunds

Proof of Funds is an Android mobile application that leverages Zero-Knowledge (ZK) cryptography to allow users to prove they possess certain cryptocurrency balances without revealing their exact wallet amounts, addresses, or transaction history. This creates a new paradigm for privacy-preserving financial verification in the Web3 ecosystem.

The Problem: In traditional financial systems, proving you have sufficient funds requires revealing sensitive information - your exact balance, account details, and often your entire transaction history. This creates privacy concerns and security risks.

The Solution: Zero-Knowledge proofs enable users to cryptographically prove they meet certain financial criteria (like having a minimum balance or being in the top percentage of holders) while keeping all other information completely private.

This project represents a significant advancement in privacy-preserving financial verification. By combining Zero-Knowledge cryptography with mobile blockchain technology, it enables a new class of applications where users can prove financial capacity without compromising privacy. This has profound implications for DeFi, DAOs, institutional crypto adoption, and the broader Web3 ecosystem.

The application demonstrates how cryptographic primitives can be made accessible to everyday users through intuitive mobile interfaces, bridging the gap between advanced cryptography and practical financial applications.

Android Development Stack
Kotlin: Primary language for all Android components
Jetpack Compose: Modern declarative UI framework for native Android development
Navigation Compose: Type-safe navigation between screens
ViewModel + StateFlow: Reactive state management with lifecycle awareness
Material Design 3: Modern design system with dynamic theming

Zero-Knowledge Cryptography
Circom: Domain-specific language for writing ZK circuits
Mopro: Rust-based library for generating ZK proofs
Rust FFI: Foreign Function Interface to bridge Rust cryptographic code with Kotlin
WebAssembly: Compiled circuit execution for cross-platform compatibility

Blockchain Integration
MetaMask Android SDK: Official SDK for wallet connectivity
Ethereum JSON-RPC: Direct blockchain communication
Web3j: Java/Kotlin Ethereum client library
Smart Contracts: Solidity contracts for proof verification

This project represents a sophisticated integration of modern Android development practices with cutting-edge cryptographic technologies, demonstrating how complex ZK proofs can be made accessible through intuitive mobile interfaces.