Multi-Chain CryptocurrencyWallet App
A cutting-edge cryptocurrency wallet app for secure, self-custodial management of multi-chain digital assets. Available on mobile and as a browser extension, it supports token swaps, NFT integration, and fee-free transactions with reliable performance across platforms.
Project Summary
This project involved developing a unified cryptocurrency wallet solution capable of managing diverse digital assets across major blockchain networks including TON, EVM-compatible chains, and Bitcoin.
The technical implementation required deep integration with multiple blockchain protocols, robust asset management capabilities, and enterprise-grade security measures to ensure reliable performance across mobile and browser environments while maintaining user-friendly operation.
Development Approach
Our development strategy centered on creating a cohesive cross-platform experience while establishing secure connections to heterogeneous blockchain networks.
We adopted a modular architecture that prioritized performance optimization and broad compatibility, enabling users to interact with complex blockchain functionalities through an intuitive interface. The approach emphasized security-by-design principles and scalable infrastructure to support evolving multi-chain ecosystem requirements.
Service
Type
Team size
50 persons
Technologies Stack
The application was built using a comprehensive technology stack designed for security, scalability, and cross-platform consistency. Flutter served as the primary framework for mobile development (iOS/Android), while ReactJS powered the browser extension interface. The backend infrastructure utilized NestJS and NodeJS for API services and real-time data processing, with PostgreSQL managing structured data storage. For decentralized storage of NFT metadata and assets, we integrated IPFS. Blockchain connectivity spanned multiple networks including Ethereum, BNB Chain, Polygon, TON, Bitcoin, Cardano, and TRON, with REST API and WebSocket connections ensuring reliable data synchronization. The entire ecosystem was deployed and managed on Amazon Cloud Services for enterprise-grade reliability and scalability.
The wallet provides unified management of digital assets across TON, EVM-compatible networks, and Bitcoin through a self-custodial architecture. Users can securely store, track, and manage diverse cryptocurrencies, tokens, and NFT collections within a single interface, with real-time balance updates and transaction history across all connected chains.
The platform enables efficient token swaps across different blockchain networks with minimal latency. Integration with Cardano Web3 services expands decentralized access, while optimized routing algorithms ensure cost-effective cross-chain transactions without compromising security or speed.
Comprehensive staking capabilities allow users to generate passive income from assets held within the wallet. Support for staking on Cardano, Ethereum, and CENNZ networks provides flexible earning opportunities while maintaining full user control over staked assets and rewards.
Available as native applications for iOS and Android, plus a Chrome extension, the wallet delivers consistent functionality across all platforms. Zero-fee transactions on supported blockchains enhance user value, while synchronized state management ensures seamless transitions between different access points.
Our Solutions
Our technical approach focused on creating standardized interfaces for blockchain connectivity, optimizing transaction processing pipelines, and implementing robust security frameworks. The solution architecture was designed to abstract blockchain complexity while maintaining performance and security across all supported platforms and networks.
Intergration
Blockchain abstraction layers for seamless multi-network integration.
Performance
Caching and job-queues for faster real-time transactions.
Storage
Optimized IPFS with distributed gateways and caching.
Security
Self-custodial security with ad-based zero-fee model.
Our Key Roles
- System Design
- UI/UX & Prototyping
- Frontend Development
- Backend Development
- Blockchain Development
- Deployment & Cloud Setup
Project Outcomes
The project successfully delivered a secure, high-performance multi-chain wallet that has transformed how users manage their digital assets across multiple blockchain networks. Through careful architecture and implementation, we achieved a solution that not only meets but exceeds current industry standards for security, usability, and cross-chain functionality. The wallet has demonstrated robust performance in production environments, providing users with a reliable platform for all their cryptocurrency needs.
- Stable Multi-Platform Performance – The application delivers consistent and reliable performance across both mobile devices (iOS/Android) and browser extensions, ensuring users have a seamless experience regardless of their chosen platform.
- Unified Multi-Chain Asset Management – Successfully centralized the management of diverse digital assets—including coins, tokens, and NFTs—from multiple blockchain networks (TON, EVM, Bitcoin, etc.) into a single, intuitive application interface.
- Increased User Adoption & Engagement – The convenience of in-app token swaps, staking options, and optimized fee structures has driven significant user growth and sustained platform engagement.
- Robust Security Implementation – Advanced self-custodial security measures, including encrypted key storage and secure transaction signing, ensure user assets remain protected without compromising accessibility.
The wallet has established itself as a comprehensive solution for both new and experienced cryptocurrency users, providing secure access to the expanding multi-chain ecosystem while maintaining ease of use and operational reliability.
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