Fantom-foundation/go-lachesis

package kvdb

import (
    "github.com/ethereum/go-ethereum/ethdb"
)

// Droper is able to delete the DB.
type Droper interface {
    Drop()
}

// KeyValueStore contains all the methods required to allow handling different
// key-value data stores backing the high level database.
type KeyValueStore interface {
    ethdb.KeyValueStore
    Droper
}

// FlushableKeyValueStore contains all the method for flushable databases,
// i.e. databases which write changes on disk only on flush.
type FlushableKeyValueStore interface {
    KeyValueStore

    NotFlushedPairs() int
    NotFlushedSizeEst() int
    Flush() error
    DropNotFlushed()
}

// DbProducer represents real db producer.
type DbProducer interface {
    // Names of existing databases.
    Names() []string
    // OpenDb or create db with name.
    OpenDb(name string) KeyValueStore
}