schema

Documentation

Overview

* Copyright (C) 2018 The ontology Authors * This file is part of The ontology library. * * The ontology 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 ontology 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 ontology. If not, see <http://www.gnu.org/licenses/>.

Index

• Variables
• type DataEntryPrefix
• type PersistStore
• type StoreIterator

Variables

var ErrNotFound = errors.New("not found")

Types

type DataEntryPrefix

type DataEntryPrefix byte

DataEntryPrefix

const (
	ST_STORAGE DataEntryPrefix = 0x05 //Smart contract storage key prefix
	// eth state
	ST_ETH_ACCOUNT DataEntryPrefix = 0x31 // eth account: address -> EthAccount
)

type PersistStore

type PersistStore interface {
	Get(key []byte) ([]byte, error)
	BatchPut(key []byte, value []byte)       //Put a key-value pair to batch
	BatchDelete(key []byte)                  //Delete the key in batch
	NewIterator(prefix []byte) StoreIterator //Return the iterator of store
}

PersistStore of ledger

type StoreIterator

type StoreIterator interface {
	Next() bool //Next item. If item available return true, otherwise return false
	//Prev() bool           //previous item. If item available return true, otherwise return false
	First() bool //First item. If item available return true, otherwise return false
	//Last() bool           //Last item. If item available return true, otherwise return false
	//Seek(key []byte) bool //Seek key. If item available return true, otherwise return false
	Key() []byte   //Return the current item key
	Value() []byte //Return the current item value
	Release()      //Close iterator
	Error() error  // Error returns any accumulated error.
}

Store iterator for iterate store