Providing temporary use of on-line non-downloadable software for managing digital currency and stablecoin transactions; Providing temporary use of on-line non-downloadable software for minting, redeeming, transferring, exchanging, storing, and tracking cryptocurrency, stablecoins, and blockchain-based digital assets; Providing temporary use of on-line non-downloadable software for accessing, reading, and tracking information in the field of financial transactions on a blockchain; Providing online, non-downloadable software for collecting, verifying, and transmitting information via a blockchain data feed to smart contracts; Providing temporary use of on-line non-downloadable software for decentralized finance (DeFi) services; Providing online non-downloadable software development tools for creating blockchain-based applications provided by a blockchain as a service (BAAS) provider; Providing user authentication services using blockchain technology for e-commerce transactions; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; User authentication services using blockchain technology for cryptocurrency transactions; Providing online, non-downloadable software for smart contracts using blockchain technology; Providing temporary use of on-line non-downloadable software for facilitating cross-chain blockchain interoperability and digital asset transfers