Babylon proposes Aave V4 Spokes to enable native BTC-backed borrowing without wrapped Bitcoin

Babylon Labs has submitted a temperature-check proposal to integrate with Aave V4, aiming to let users lock native BTC on Bitcoin and borrow assets via Aave without wrapped BTC, bridges, or custodians. The design uses Taproot-based vault scripts and introduces a non-transferable accounting asset, vaultBTC, to represent BTC locked in Babylon vaults as collateral within approved Aave contracts. Aave founder Stani Kulechov endorsed the idea on X and said Babylon has more than $4bn in BTC staked that could eventually be used as collateral.