github.com/oskarth/go-ethereum@v1.6.8-0.20191013093314-dac24a9d3494/ethdb/database_js.go (about)

     1  // Copyright 2014 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  // +build js
    18  
    19  package ethdb
    20  
    21  import (
    22  	"errors"
    23  )
    24  
    25  var errNotSupported = errors.New("ethdb: not supported")
    26  
    27  type LDBDatabase struct {
    28  }
    29  
    30  // NewLDBDatabase returns a LevelDB wrapped object.
    31  func NewLDBDatabase(file string, cache int, handles int) (*LDBDatabase, error) {
    32  	return nil, errNotSupported
    33  }
    34  
    35  // Path returns the path to the database directory.
    36  func (db *LDBDatabase) Path() string {
    37  	return ""
    38  }
    39  
    40  // Put puts the given key / value to the queue
    41  func (db *LDBDatabase) Put(key []byte, value []byte) error {
    42  	return errNotSupported
    43  }
    44  
    45  func (db *LDBDatabase) Has(key []byte) (bool, error) {
    46  	return false, errNotSupported
    47  }
    48  
    49  // Get returns the given key if it's present.
    50  func (db *LDBDatabase) Get(key []byte) ([]byte, error) {
    51  	return nil, errNotSupported
    52  }
    53  
    54  // Delete deletes the key from the queue and database
    55  func (db *LDBDatabase) Delete(key []byte) error {
    56  	return errNotSupported
    57  }
    58  
    59  func (db *LDBDatabase) Close() {
    60  }
    61  
    62  // Meter configures the database metrics collectors and
    63  func (db *LDBDatabase) Meter(prefix string) {
    64  }
    65  
    66  func (db *LDBDatabase) NewBatch() Batch {
    67  	return nil
    68  }