42 Providing on-line non-downloadable software for exchanging and transacting cryptocurrency, digital currency, virtual currency, blockchain enabled currency, and related assets; Providing online, non-downloadable software to enable transactions in cryptocurrency, digital currency, virtual currency, blockchain enabled currency, and related assets using blockchain, smart contracts, and related technologies; Providing technology information in the field of cryptocurrency; Application programming interfaces (APIs) to access data related to interest on digital assets, trades of digital assets and financial instruments, and status of digital assets collateral and liquidation; non-downloadable software to enable trading digital assets and financial instruments related to digital assets; non-downloadable software for initiating, managing, and enforcing financial transactions involving digital assets; and non-downloadable software for initiating, managing, and enforcing the receipt and payment of interest on digital assets, use of digital asset collateral and liquidation of digital assets; providing on-line non-downloadable software for buying, selling, sending, and receiving cryptocurrency, digital currency, virtual currency, blockchain enabled currency, and related assets