CachedBatchOption defines a way to set the cache layer for db.

NewBatch returns a batch.

NewCachedBatch returns a new cached batch buffer.

NewKVCache returns a KVCache.

NewKVStoreForTrie creates a new KVStoreForTrie.

NewMemKVStore instantiates an in-memory KV store.

NewOnDiskDB instantiates an on-disk KV store.

Delete indicate the type of write operation to be Delete.

Put indicate the type of write operation to be Put.

ErrAlreadyDeleted indicates the key has been deleted.

ErrAlreadyExist indicates certain item already exists in Blockchain database.

ErrIO indicates the generic error of DB I/O operation.

ErrNotExist indicates certain item does not exist in Blockchain database.

KVStoreForTrie defines a kvstore with fixed bucket and cache layer for trie.

KVStore is the interface of KV store.

Option defines an interface to initialize the kv store.