Bitcoin Avalanche Bridged (BTC.b) is a wrapped version of Bitcoin that operates on the Avalanche blockchain, enabling Bitcoin to be used within the Avalanche ecosystem. Through the Avalanche Bridge, users can transfer native Bitcoin (BTC) onto Avalanche, where it is represented as BTC.b. This bridged asset allows for seamless participation in decentralised applications (dApps) on Avalanche and across various other blockchain ecosystems using LayerZero’s omnichain messaging protocol. BTC.b can be transferred across multiple chains like Ethereum, Binance Smart Chain (BSC), Arbitrum, Optimism, Fantom, and Aptos.

BTC.b enhances blockchain interoperability by allowing Bitcoin to be used across multiple platforms, particularly within Avalanche’s decentralised finance (DeFi) environment. It facilitates fast, low-cost cross-chain transfers of Bitcoin, providing users with opportunities for arbitrage, liquidity provision, and participation in various DeFi applications. As an omnichain token standard, BTC.b reduces security risks associated with traditional wrapped assets by using LayerZero’s OFT (Omnichain Fungible Token) technology. This enables efficient cross-chain token movement without the need for intermediaries like middlechains or trusted validators.

BTC.b was created by Ava Labs, the team behind the Avalanche blockchain, in partnership with LayerZero, which provided the infrastructure for cross-chain messaging and interoperability. The bridge was designed to securely transfer Bitcoin between the Avalanche and Bitcoin networks using advanced technologies, including Intel SGX enclaves, to ensure transaction security and integrity.