UniCross is a cross-chain BTC inscription minting platform on Layer2. Users can mint Layer1 BRC-20 (ARC-20 and more) tokens on Layer2s through UniCross, and they can choose to pay with multiple chain assets such as BRC-20s, BTC, and ETH. Users are issued with stTokens that are tradable on Unicrossʼ Marketplace or exchanged for Layer2 ERC-20 Tokens. stToken is an ERC-20 standard token which acts as a "voucher" for redeeming Bitcoin Inscriptions on Layer2.