// CreateDB creates, initializes, and opens a database for use.
func CreateDB(args ...interface{}) (database.Db, error) {
if err := parseArgs("CreateDB", args...); err != nil {
return nil, err
}
log = database.GetLog()
return newMemDb(), nil
}
// CreateDB creates, initializes and opens a database for use.
func CreateDB(args ...interface{}) (database.Db, error) {
dbpath, err := parseArgs("Create", args...)
if err != nil {
return nil, err
}
log = database.GetLog()
// No special setup needed, just OpenBB
db, err := openDB(dbpath, true)
if err == nil {
ldb := db.(*LevelDb)
ldb.lastBlkIdx = -1
ldb.lastAddrIndexBlkIdx = -1
ldb.nextBlock = 0
}
return db, err
}
// OpenDB opens an existing database for use.
func OpenDB(args ...interface{}) (database.Db, error) {
dbpath, err := parseArgs("OpenDB", args...)
if err != nil {
return nil, err
}
log = database.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
}
}
// Load the last block whose transactions have been indexed by address.
if sha, idx, err := ldb.fetchAddrIndexTip(); err == nil {
ldb.lastAddrIndexBlkSha = *sha
ldb.lastAddrIndexBlkIdx = idx
} else {
ldb.lastAddrIndexBlkIdx = -1
}
ldb.lastBlkSha = *lastSha
ldb.lastBlkIdx = lastknownblock
ldb.nextBlock = lastknownblock + 1
return db, nil
}