Downloadable software development tools for creating blockchain-based applications provided by a blockchain as a service (BAAS) provider; downloadable decentralized applications (DApps) for providing data availability services on a blockchain; downloadable decentralized applications (DApps) for providing data availability services off-chain; downloadable decentralized applications (DApps) for staking of crypto assets; downloadable decentralized applications (DApps) for verification of blockch...