BTC Connect is the first account abstraction protocol in the BTC ecosystem, implementing ERC-4337 on EVM-compatible Bitcoin Layer-2s to assign smart accounts directly to native Bitcoin wallets. BTC Connect implements a smart account, Paymaster, Bundler, and unique Bitcoin-specific modal for unified utilization of smart accounts on supported EVM chains (such as Merlin, BEVM, bSquared) alongside native Bitcoin transactions. Essentially, BTC Connect facilitates wallet connection (on Bitcoin Layer-1) with UniSat, OKX, or BitGet, assigning an EVM-based smart account with the wallet in question as its Signer. Therefore, users can execute transactions both through smart accounts and their native Bitcoin account within the same wallet interface.

In other words, BTC Connect abstracts away the complexities commonly associated with the dynamic between Layer-1 and Layer-2 accounts, going even further as to enhance this connection through the usage of smart accounts for additional flexibility (such as gasless transactions, batched transactions, and session keys).

This architecture is constituted by the following components: -A connection modal aggregating BTC wallets and directly facilitating connection. -An associated smart account deployed on EVM-compatible Bitcoin Layer-2s, authenticated by the previously connected Bitcoin wallet. -Account abstraction infrastructure on said Layer-2s, such as Particle's Omnichain Paymaster, the Particle Bundler, etc. -An embedded wallet that controls and displays the associated smart account, with the capability to send assets, view transactions and balances, etc.)