DB

The db package contains the key-value database interface and memdb implementation. The memdb is a simple in-memory key-value store that is used for testing and development purposes.

Context

The main purpose of the db package is to provide decoupling between cosmos-db and iavl packages. It provides a simple wrapper for the old users of iavl and cosmos-db to use the new db package without changing their code. For example:

package main

import (
    "cosmossdk.io/log"
	dbm "github.com/cosmos/cosmos-db"

	"github.com/cosmos/iavl"
	idbm "github.com/cosmos/iavl/db"
)

func main() {
    levelDB, err := dbm.NewDB("application", dbm.GoLevelDBBackend, "test")
	if err != nil {
		panic(err)
	}

	tree := iavl.NewMutableTree(idbm.NewWrapper(dbm.NewPrefixDB(levelDB, []byte("s/k:main/"))), 0, false, log.NewNopLogger())
}