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package ethdb
import (
"fmt"
"github.com/ethereum/eth-go/ethutil"
)
/*
* This is a test memory database. Do not use for any production it does not get persisted
*/
type MemDatabase struct {
db map[string][]byte
}
func NewMemDatabase() (*MemDatabase, error) {
db := &MemDatabase{db: make(map[string][]byte)}
return db, nil
}
func (db *MemDatabase) Put(key []byte, value []byte) {
db.db[string(key)] = value
}
func (db *MemDatabase) Get(key []byte) ([]byte, error) {
return db.db[string(key)], nil
}
func (db *MemDatabase) Delete(key []byte) error {
delete(db.db, string(key))
return nil
}
func (db *MemDatabase) Print() {
for key, val := range db.db {
fmt.Printf("%x(%d): ", key, len(key))
node := ethutil.NewValueFromBytes(val)
fmt.Printf("%q\n", node.Interface())
}
}
func (db *MemDatabase) Close() {
}
func (db *MemDatabase) LastKnownTD() []byte {
data, _ := db.Get([]byte("LastKnownTotalDifficulty"))
if len(data) == 0 || data == nil {
data = []byte{0x0}
}
return data
}
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