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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rawdb
// DatabaseReader wraps the Has and Get method of a backing data store.
type DatabaseReader interface {
Has(key []byte) (bool, error)
Get(key []byte) ([]byte, error)
}
// DatabaseWriter wraps the Put method of a backing data store.
type DatabaseWriter interface {
Put(key []byte, value []byte) error
}
// DatabaseDeleter wraps the Delete method of a backing data store.
type DatabaseDeleter interface {
Delete(key []byte) error
}
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