Auran is building the first cross-chain Bitcoin protocol based on its own custom L1 built with Cosmos SDK, Tendermint, and a decentralized TSS network. This protocol serves as a liquidity layer, bridging the nascent Bitcoin Layer 2 (L2) ecosystem with the Bitcoin blockchain. It enables users to conduct native swaps, with support for principal metaprotocols such as Runes, BRC20s, and Ordinals. Additionally, the protocol integrates a messaging system that enables cross-chain smart contract interactions within the Bitcoin ecosystem.