Пример #1
0
// CreateDB creates, initializes, and opens a database for use.
func CreateDB(args ...interface{}) (btcdb.Db, error) {
	if err := parseArgs("CreateDB", args...); err != nil {
		return nil, err
	}

	log = btcdb.GetLog()
	return newMemDb(), nil
}
Пример #2
0
// CreateDB creates, initializes and opens a database for use.
func CreateDB(args ...interface{}) (btcdb.Db, error) {
	dbpath, err := parseArgs("Create", args...)
	if err != nil {
		return nil, err
	}

	log = btcdb.GetLog()

	// No special setup needed, just OpenBB
	db, err := openDB(dbpath, true)
	if err == nil {
		ldb := db.(*LevelDb)
		ldb.lastBlkIdx = -1
		ldb.nextBlock = 0
	}
	return db, err
}
Пример #3
0
// OpenDB opens an existing database for use.
func OpenDB(args ...interface{}) (btcdb.Db, error) {
	dbpath, err := parseArgs("OpenDB", args...)
	if err != nil {
		return nil, err
	}

	log = btcdb.GetLog()

	db, err := openDB(dbpath, false)
	if err != nil {
		return nil, err
	}

	// Need to find last block and tx

	var lastknownblock, nextunknownblock, testblock int64

	increment := int64(100000)
	ldb := db.(*LevelDb)

	var lastSha *btcwire.ShaHash
	// forward scan
blockforward:
	for {

		sha, err := ldb.fetchBlockShaByHeight(testblock)
		if err == nil {
			// block is found
			lastSha = sha
			lastknownblock = testblock
			testblock += increment
		} else {
			if testblock == 0 {
				//no blocks in db, odd but ok.
				lastknownblock = -1
				nextunknownblock = 0
				var emptysha btcwire.ShaHash
				lastSha = &emptysha
			} else {
				nextunknownblock = testblock
			}
			break blockforward
		}
	}

	// narrow search
blocknarrow:
	for lastknownblock != -1 {
		testblock = (lastknownblock + nextunknownblock) / 2
		sha, err := ldb.fetchBlockShaByHeight(testblock)
		if err == nil {
			lastknownblock = testblock
			lastSha = sha
		} else {
			nextunknownblock = testblock
		}
		if lastknownblock+1 == nextunknownblock {
			break blocknarrow
		}
	}

	ldb.lastBlkSha = *lastSha
	ldb.lastBlkIdx = lastknownblock
	ldb.nextBlock = lastknownblock + 1

	return db, nil
}
Пример #4
0
// CreateSqliteDB creates, initializes and opens a database for use.
func CreateSqliteDB(filepath string) (pbdb btcdb.Db, err error) {
	log = btcdb.GetLog()
	return newOrCreateSqliteDB(filepath, true)
}