bitcoinleveldb-util vs bitcoinleveldb-slice vs bitcoinleveldb-cache

Low-level utilities for bitcoin-rs/bitcoinleveldb providing C++-style non-dropping singletons and destructor control via DoNotDestruct and NoDestructor<T>.

Low-level, non-owning byte Slice type for LevelDB-style storage in bitcoin-rs, providing pointer-based views, prefix operations, lexicographic comparison, and FFI-friendly interoperability without copying.

Low-level, Bitcoin Core–compatible in-memory cache for LevelDB-style storage, providing capacity-bounded LRU eviction, explicit charge-based memory accounting, and opaque pointer values with custom deleters for FFI-heavy systems.