New returns a wrapped LevelDB object.

BitsPerKey is the number of bits to add to the bloom filter per key.

BlockCacheSize is the number of bytes to use for block caching in leveldb.

HandleCap is the number of files descriptors to cap levelDB to use.

Name is the name of this database for database switches.

WriteBufferSize is the number of bytes to use for buffers in leveldb.

Database is a persistent key-value store.