How to solve user experience friction when EVM chains extend Bitcoin?
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How to solve user experience friction when EVM chains extend Bitcoin?
Why not directly use existing EVM chain components as a Bitcoin layer2?
Navigating Web3 tides with focused insightsBy Haotian
Since there is no "canonical" standard for Bitcoin Layer 2, some current market solutions treat EVM chains directly as scaling layers—an arguably clever, convenient, and highly efficient shortcut to achieve Layer 2 functionality.
However, such solutions face an awkward reality: native wallets like Unisat cannot natively interact with EVM chain environments, requiring users to switch over to MetaMask. What’s the solution? @ParticleNtwrk offers a compelling answer:
Recently, the Bitcoin Layer 2 ecosystem resembles the chaotic "Warring States" period—full of competing factions. Aside from the well-known limitations of Bitcoin's base layer, the approaches to scaling it are wildly diverse and uncertain. Some progress slowly like Lightning Network; others are technically intricate like BitVM; while some rely on client-side verification that remains largely unproven. Amid this confusion, certain projects have opted for a simpler path:
Given that Bitcoin’s native assets are crucial and EVM chains offer superior scalability, while pure UTXO-based architectures are overly complex—why not simply adopt existing EVM chain components as Bitcoin Layer 2?
Early observations show that projects like Merlin Chain and LumiBit largely follow this approach. They accept Bitcoin mainnet's inherent limitations in validation and computation, treating Bitcoin purely as a settlement layer. Then, they attach mature EVM chains—already proven in scalability and consensus—to enable efficient circulation and management of BTC and its derivative assets, thereby achieving Layer 2 expansion.
Typically, EVM environments support wallets like MetaMask, while Bitcoin supports native tools such as Unisat and Xverse. If EVM chains serve as Bitcoin’s Layer 2, users must migrate their assets from Unisat to MetaMask and use MetaMask to access the Layer 2 network. This infrastructure creates a poor user experience. For Bitcoin-native users—especially those drawn in by inscriptions—the need to learn multi-chain wallet usage presents a significant barrier.
This friction stems from the incompatibility between Bitcoin’s signature algorithm and EVM’s contract parsing mechanism. Forced integration inevitably degrades user experience. To address this, Particle Network has introduced BTC Connect—a blockchain account abstraction feature designed specifically for the Bitcoin ecosystem. Its goal is to allow users to seamlessly connect to EVM chains directly through native Bitcoin wallets like Unisat. How does it work? The logic is simple:
Unisat uses its own private key generation and encryption algorithm, which EVM-native wallets like MetaMask cannot normally parse, making correct signature verification during DApp interactions impossible.
Particle provides an account abstraction framework: when a user connects their Unisat wallet, Particle automatically generates a corresponding EVM address on the EVM chain. Any front-end interaction requests made via Unisat are then seamlessly adapted by Particle in the backend to work within the EVM environment.
For example: when a user bridges assets from Bitcoin mainnet to Merlin Chain, Particle enables secure transfer of BTC to Merlin Chain. Once received, the destination address automatically mints a wrapped BTC token on the user’s corresponding EVM address for circulation via smart contracts.
Another example: when a user connects Merlin Chain using Unisat and attempts a Swap transaction, Merlin needs to invoke the user’s local Unisat wallet to generate a signature. But due to the mismatch between Bitcoin’s signing logic and EVM’s parsing rules, this may fail. Here, Particle acts as a communication protocol—Merlin instead calls the private key of the user’s mapped EVM address, which then triggers the corresponding Unisat wallet’s private key via Particle’s account abstraction network. The entire process is invisible to the user.
Achieving compatibility between native Bitcoin wallets and EVM environments is just the first step. Since Particle’s solution is fundamentally built on the ERC-4337 account abstraction standard, components like Smart Accounts, Paymasters, and Bundlers unlock powerful features: gasless transactions, batched operations, and cross-EVM chain interoperability. In theory, a single BTC wallet could interact across all EVM chains.
Of course, critical challenges remain—particularly around securely bridging Bitcoin assets (especially inscriptions beyond BTC) to EVM chains. Key questions include: how to safely bridge native BTC assets, how to efficiently maintain records using various indexers, how inscription data availability functions, and how challenge mechanisms should be designed. Ultimately, the core of Layer 2 expansion lies in the broad circulation and real-world adoption of derivative assets.
In a way, using Bitcoin solely as a settlement layer for EVM-based Layer 2 might seem less “sophisticated” than native Bitcoin solutions like client-side validation or state channels—but that’s not necessarily true. Given the absence of a canonical standard for Bitcoin Layer 2 today, and following the principle that “whatever exists is reasonable,” these fast-moving, pragmatic solutions are exploring viable paths. Do you agree?
Regardless of your stance, the BTC ecosystem will evolve at its own pace, gradually converging toward directions with broader market acceptance—just as Rollup eventually became Ethereum’s dominant Layer 2 paradigm after a long maturation process.
Anyway, Particle’s latest move is clearly a big win. Their ability to cut through the chaos with a foundational, interoperable framework is truly impressive.
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Haotian | CryptoInsight
