historydb

Documentation

Index

• func ConstructCompositeHistoryKey(ns string, key string, blocknum uint64, trannum uint64) []byte
• func ConstructPartialCompositeHistoryKey(ns string, key string, endkey bool) []byte
• func SplitCompositeHistoryKey(bytesToSplit []byte, separator []byte) ([]byte, []byte)
• type HistoryDB
• type HistoryDBProvider

Functions

func ConstructCompositeHistoryKey

func ConstructCompositeHistoryKey(ns string, key string, blocknum uint64, trannum uint64) []byte

ConstructCompositeHistoryKey builds the History Key of namespace~key~blocknum~trannum using an order preserving encoding so that history query results are ordered by height

func ConstructPartialCompositeHistoryKey

func ConstructPartialCompositeHistoryKey(ns string, key string, endkey bool) []byte

ConstructPartialCompositeHistoryKey builds a partial History Key namespace~key~ for use in history key range queries

func SplitCompositeHistoryKey

func SplitCompositeHistoryKey(bytesToSplit []byte, separator []byte) ([]byte, []byte)

SplitCompositeHistoryKey splits the key bytes using a separator

Types

type HistoryDB

type HistoryDB interface {
	NewHistoryQueryExecutor() (ledger.HistoryQueryExecutor, error)
	Commit(block *common.Block) error
	GetBlockNumFromSavepoint() (uint64, error)
}

HistoryDB - an interface that a history database should implement

type HistoryDBProvider

type HistoryDBProvider interface {
	// GetDBHandle returns a handle to a HistoryDB
	GetDBHandle(id string) (HistoryDB, error)
	// Close closes all the HistoryDB instances and releases any resources held by HistoryDBProvider
	Close()
}

HistoryDBProvider provides an instance of a history DB