RedStone is a multi-chain Oracle service that provides frequently updated, reliable, and diverse data feeds. ZeroLend utilizes price feeds from Redstone Oracles to calculate collateral value and liquidations.
RedStone protects all ZeroLend's markets on Zircuit, Manta, and Blast and also provides LRT feeds on ETH mainnet and Linea. ZeroLend also uses LBTC / BTC feed from RedStone on Base. You can find the exact contract addresses in RedStone Docs: