Particle Network’s groundbreaking solution for the Bitcoin ecosystem is BTC Connect—the first EVM-compatible ERC-4337 Account Abstraction (AA) protocol designed for Bitcoin. This protocol bridges the gap between Bitcoin’s native functionality and EVM-based Layer-2 networks, enhancing connectivity and programmability.
Motivation and Goals: Solving Bitcoin’s Fragmentation Problem
BTC Connect addresses the critical challenge of chain abstraction within the Bitcoin ecosystem. By leveraging account abstraction, it eliminates friction in wallet interactions and UI/UX disparities across Bitcoin Layer-2 networks.
Key Challenges:
- Wallet Fragmentation: Bitcoin users (e.g., UniSat wallet holders) must install MetaMask to interact with EVM-compatible L2s, creating a cumbersome experience.
- Liquidity Silos: Separated tooling and wallets fragment users and liquidity, hindering mass adoption.
- Limited Programmability: Bitcoin’s scripting language constraints restrict smart contract capabilities compared to EVM chains.
BTC Connect resolves these issues by enabling native Bitcoin wallets (like UniSat, BitGet, or OKX) to control smart accounts on EVM-compatible Bitcoin L2s—all through a single interface.
How BTC Connect Works: Unifying Bitcoin and EVM Accounts
BTC Connect merges Bitcoin-native wallets with EVM smart accounts via ERC-4337 AA, allowing seamless interactions across ecosystems.
Core Components:
- Smart Account: An EVM-compatible account assigned to the user’s Bitcoin wallet.
- Paymaster: Sponsors gas fees, enabling gasless transactions.
- Bundler: Aggregates and executes user operations.
- Bitcoin Wallet Modal: Facilitates connection via native wallets (UniSat, OKX, etc.).
User Flow:
- Connect a Bitcoin wallet (e.g., UniSat).
- BTC Connect generates an EVM smart account linked to the wallet.
- Users interact with L2 dApps directly through their Bitcoin wallet—no additional plugins or key management required.
👉 Discover how BTC Connect simplifies cross-chain interactions
Benefits of BTC Connect
- Chain Abstraction: Use one wallet for Bitcoin, Ordinals, and EVM dApps.
- Gasless Transactions: dApps can sponsor fees via Paymasters.
- Enhanced UX: Eliminates multi-wallet juggling and popup fatigue.
- EVM Compatibility: Supports Ethereum-like smart contracts on Bitcoin L2s.
FAQ: Addressing Common Queries
1. What wallets support BTC Connect?
BTC Connect integrates with UniSat, OKX, and BitGet wallets, with plans to add more.
2. Can I pay gas fees in Bitcoin?
No—gas fees are paid in the L2’s native token or via dApp-sponsored (gasless) transactions.
3. Is BTC Connect secure?
Yes. Users retain control of their Bitcoin keys, and smart accounts follow ERC-4337 security standards.
4. Which Bitcoin L2s are compatible?
All EVM-compatible Bitcoin L2s (e.g., Stacks, Rootstock) can integrate BTC Connect.
Conclusion
BTC Connect pioneers account abstraction for Bitcoin, solving fragmentation and unlocking seamless cross-chain interactions. By unifying Bitcoin and EVM wallets, it paves the way for mass adoption of Bitcoin L2s.