Build a REST API for a multi-signature vault system. Vaults have M-of-N threshold signing, PDA-derived addresses, ed25519 signature verification for proposal approval, and a key-value data store governed by multi-sig consensus. All data is stored in memory.
Build a REST API for managing a Solana address book. Store contacts with auto-detected address types (wallet vs PDA), derive Associated Token Accounts, verify address ownership via ed25519 signatures, and derive PDAs.
Build a REST API for a PDA-based name registry system. Users register human-readable names that map to Program Derived Addresses (PDAs), create hierarchical sub-names, transfer ownership via ed25519 signature verification, and verify PDA derivations. All data is stored in memory.
