Hybrid dApps
Applications that combine EVM smart contract logic with native TON user experience through TAC
Hybrid dApps are applications that run their core logic on TAC’s EVM Layer while providing a completely native experience for TON users. Unlike traditional cross-chain applications that require users to switch networks or manage multiple wallets, hybrid dApps feel like native TON applications while leveraging the full power of EVM’s mature ecosystem.
What Makes an App “Hybrid”
Traditional dApps exist entirely within one ecosystem. Hybrid dApps span two ecosystems seamlessly:
Backend (EVM Side)
- Solidity contracts on TAC EVM Layer
- Complex DeFi primitives and composability
- Mature tooling and battle-tested code
- Rich ecosystem of integrations
Frontend (TON Side)
- TON wallet integration
- Telegram Mini App interface
- Native asset handling
- Familiar TON user flows
Users interact with hybrid dApps exactly like they would with native TON apps, they never know there’s EVM logic running behind the scenes.
The Hybrid dApp Advantage
Hybrid dApps unlock a new paradigm where users and developers enjoy the strengths of both TON and EVM ecosystems—without compromise.
For Users: Native Experience, Expanded Capabilities
No learning curve or new tools:
- Use existing TON wallet (Tonkeeper, Tonhub, etc.)
- Access through familiar Telegram Mini Apps
- Transact with TON tokens directly
- No network switching or bridge operations
Users get access to sophisticated DeFi without leaving their comfort zone
No learning curve or new tools:
- Use existing TON wallet (Tonkeeper, Tonhub, etc.)
- Access through familiar Telegram Mini Apps
- Transact with TON tokens directly
- No network switching or bridge operations
Users get access to sophisticated DeFi without leaving their comfort zone
Access to EVM’s rich ecosystem:
- Advanced DeFi protocols (AMMs, lending, derivatives)
- Complex smart contract interactions
- Composable protocols and yield strategies
- Battle-tested security models
TON users can now access applications that would be impossible to build natively in FunC
Your tokens work everywhere:
- TON tokens automatically work in EVM applications
- No manual bridging or wrapped token management
- Unified liquidity across both ecosystems
- Seamless asset flow based on user intent
For Developers: Best of Both Worlds
Leverage Existing Code
Leverage Existing Code
Deploy proven smart contracts without rewrites:
- Use existing Solidity contracts as-is
- Import battle-tested DeFi primitives
- Leverage OpenZeppelin libraries and standards
- Maintain existing security audits and testing
No need to rebuild complex logic in FunC or learn new development paradigms.
Reach Massive Audience
Reach Massive Audience
Access TON’s 1 billion+ user base:
- Deploy once, serve both EVM and TON users
- Leverage Telegram’s distribution network
- Tap into TON’s growing DeFi ecosystem
- Benefit from TON’s fast transaction speeds
Expand your user base without building separate applications.
Simplified Development
Simplified Development
Focus on application logic, not infrastructure:
- TAC SDK handles all cross-chain complexity
- Automatic proxy contract generation for common patterns
- Standard Ethereum tooling continues to work
- Rich documentation and developer resources
Build sophisticated applications without becoming a cross-chain expert.
Hybrid dApp Architecture
Here’s how the different components work together to create a seamless hybrid experience:
User Interface
Native TON experience:
- Telegram Mini App or web interface
- TON wallet connection (TON Connect protocol)
- Familiar TON UX patterns and flows
- Real-time transaction status updates
Frontend Logic
TAC SDK integration:
- JavaScript/TypeScript SDK handles cross-chain messaging
- Automatic transaction routing and status tracking
- Asset bridging management
- Error handling and recovery
Cross-Chain Layer
TAC infrastructure:
- TON Adapter handles secure message routing
- Automatic asset locking/unlocking operations
- Sequencer network validates all transactions
- Proxy contracts translate between ecosystems
Application Logic
EVM smart contracts:
- Core business logic runs on TAC EVM Layer
- Complex DeFi operations and state management
- Integration with other EVM protocols
- Standard Solidity development patterns
Development Patterns
Hybrid dApps on TAC are designed to feel native to both TON and EVM users, blending familiar interfaces with powerful cross-chain capabilities.
By leveraging TAC’s architecture, developers can build applications that seamlessly connect users, assets, and protocols across ecosystems—without compromising on user experience or security. Below are the key patterns and best practices for building truly hybrid applications.
Frontend Architecture
Most hybrid dApps follow a common frontend pattern:
Smart Contract Architecture
EVM-side contracts follow standard patterns with TAC-specific proxy integration:
User Journey Example
Let’s follow a TON user interacting with a hybrid DEX:
Discovery
User discovers the DEX through a Telegram Mini App or web interface. The app looks and feels like a native TON application.
Connection
User connects their TON wallet (Tonkeeper) using standard TON Connect. No new wallets or seed phrases required.
Asset Selection
User selects TON tokens to swap. The interface shows familiar token names and balances from their TON wallet.
Transaction
User approves the swap in their TON wallet. Behind the scenes, TAC locks their tokens and sends a message to the EVM DEX contract.
Execution
The DEX executes the swap using sophisticated AMM logic on the EVM side. The user sees real-time status updates in the interface.
Completion
New tokens appear in the user’s TON wallet automatically. The entire process feels like a native TON transaction.
The user never knew they were interacting with an EVM application - it felt completely native to TON.
Best Practices for Hybrid dApps
User Experience Design
User Experience Design
Make it feel native to TON:
- Use TON-style UI patterns and terminology
- Implement proper loading states for cross-chain operations
- Provide clear transaction status updates
- Handle errors gracefully with user-friendly messages
- Optimize for Telegram Mini App constraints
Performance Optimization
Performance Optimization
Minimize cross-chain latency:
- Batch operations when possible to reduce round trips
- Use optimistic UI updates where safe
- Implement proper caching for frequently accessed data
- Pre-validate transactions on the frontend
- Provide immediate feedback for user actions
Security Considerations
Security Considerations
Protect users across both chains:
- Validate all inputs on both frontend and smart contract
- Implement proper slippage protection for DeFi operations
- Use secure proxy contract patterns
- Handle failed transactions gracefully
- Audit both frontend and smart contract code
Asset Management
Asset Management
Seamless token handling:
- Map TON tokens to EVM equivalents clearly
- Handle decimal differences between chains (9 vs 18)
- Provide clear asset conversion information
- Implement proper error handling for insufficient balances
- Show unified balance views when possible
Common Challenges & Solutions
Building hybrid dApps comes with unique challenges, but TAC provides solutions for each one.
Cross-Chain Latency
Challenge: Cross-chain operations take longer than single-chain transactions Solution: Use optimistic UI updates and clear progress indicators to maintain responsive UX
Asset Complexity
Challenge: Managing token mappings and decimal differences between chains Solution: TAC SDK handles token mapping automatically, with helpers for decimal conversion
Error Handling
Challenge: Failures can occur on either chain with different error types
Solution: Comprehensive error handling in TAC SDK with automatic rollback protection
Testing Complexity
Challenge: Testing requires simulating both TON and EVM environments
Solution: TAC provides testing utilities and local development environments
Ready to Build?
Hybrid dApps represent the future of cross-chain applications - combining the best of both ecosystems while hiding complexity from users.