Wrapped Bitcoin (Avalanche Bridge) (WBTC.e) is a version of Wrapped Bitcoin (WBTC) that has been bridged from the Ethereum blockchain to the Avalanche blockchain via the Avalanche Bridge. WBTC is a tokenized version of Bitcoin that operates on Ethereum, maintaining a peg to Bitcoin's value. The "e" in WBTC.e signifies that this token was initially an ERC-20 token on Ethereum before being transferred to the Avalanche network, using advanced bridge technology for enhanced security and operational efficiency.

WBTC.e is used within the Avalanche blockchain ecosystem to facilitate the seamless integration of Bitcoin liquidity into the Avalanche DeFi ecosystem. It allows Bitcoin holders to engage in decentralized finance activities such as trading, lending, and liquidity provision, taking advantage of the lower transaction fees and faster processing times on Avalanche compared to Ethereum.

The bridging of WBTC to the Avalanche network, resulting in WBTC.e, was facilitated by the Avalanche Bridge, developed by Ava Labs. This bridge employs Intel SGX technology to ensure secure and efficient asset transfers, managed by a consortium of trusted partners known as Wardens, who maintain the integrity and security of cross-chain transactions, ensuring the reliability and usability of WBTC.e within the Avalanche ecosystem.