Implement TxOut Spend tracking.

Return spent data in TxListReply.

Unspend coins when blocks are removed during DropAfterBlock.

db.go

@@ -161,9 +161,11 @@ type DriverDB struct {
 // TxListReply is used to return individual transaction information when
 // data about multiple transactions is requested in a single call.
 type TxListReply struct {
-	Sha *btcwire.ShaHash
+	Sha     *btcwire.ShaHash
-	Tx  *btcwire.MsgTx
+	Tx      *btcwire.MsgTx
-	Err error
+	Height  int64
+	TxSpent []bool
+	Err     error
 }
 
 // driverList holds all of the registered database backends.

sqlite3/insertremove_test.go

@@ -0,0 +1,217 @@
+// Copyright (c) 2013 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package sqlite3_test
+
+import (
+	//"compress/bzip2"
+	//"encoding/binary"
+	"github.com/conformal/btcdb"
+	"github.com/conformal/btcdb/sqlite3"
+	"github.com/conformal/btcutil"
+	"github.com/conformal/btcwire"
+	//"io"
+	"fmt"
+	"os"
+	"path/filepath"
+	//"strings"
+	"testing"
+)
+
+var tstBlocks []*btcutil.Block
+
+func loadblocks(t *testing.T) []*btcutil.Block {
+	if len(tstBlocks) != 0 {
+		return tstBlocks
+	}
+
+	testdatafile := filepath.Join("testdata", "blocks1-256.bz2")
+	blocks, err := loadBlocks(t, testdatafile)
+	if err != nil {
+		t.Errorf("Unable to load blocks from test data: %v", err)
+		return nil
+	}
+	tstBlocks = blocks
+	return blocks
+}
+
+func TestUnspentInsert(t *testing.T) {
+	testUnspentInsert(t, dbTmDefault)
+	testUnspentInsert(t, dbTmNormal)
+	testUnspentInsert(t, dbTmFast)
+}
+
+// insert every block in the test chain
+// after each insert, fetch all the tx affected by the latest
+// block and verify that the the tx is spent/unspent
+// new tx should be fully unspent, referenced tx should have
+// the associated txout set to spent.
+func testUnspentInsert(t *testing.T, mode int) {
+	// Ignore db remove errors since it means we didn't have an old one.
+	dbname := "tstdbuspnt1"
+	_ = os.Remove(dbname)
+	db, err := btcdb.CreateDB("sqlite", dbname)
+	if err != nil {
+		t.Errorf("Failed to open test database %v", err)
+		return
+	}
+	defer os.Remove(dbname)
+	defer db.Close()
+
+	switch mode {
+	case dbTmDefault: // default
+		// no setup
+	case dbTmNormal: // explicit normal
+		db.SetDBInsertMode(btcdb.InsertNormal)
+	case dbTmFast: // fast mode
+		db.SetDBInsertMode(btcdb.InsertFast)
+		if sqldb, ok := db.(*sqlite3.SqliteDb); ok {
+			sqldb.TempTblMax = 100
+		} else {
+			t.Errorf("not right type")
+		}
+	case dbTmNoVerify: // validated block
+		t.Errorf("UnspentInsert test is not valid in NoVerify mode")
+	}
+
+	// Since we are dealing with small dataset, reduce cache size
+	sqlite3.SetBlockCacheSize(db, 2)
+	sqlite3.SetTxCacheSize(db, 3)
+
+	blocks := loadblocks(t)
+endtest:
+	for height := int64(1); height < int64(len(blocks)); height++ {
+
+		block := blocks[height]
+		// look up inputs to this x
+		mblock := block.MsgBlock()
+		var txneededList []*btcwire.ShaHash
+		var txlookupList []*btcwire.ShaHash
+		var txOutList []*btcwire.ShaHash
+		var txInList []*btcwire.OutPoint
+		for _, tx := range mblock.Transactions {
+			for _, txin := range tx.TxIn {
+				if txin.PreviousOutpoint.Index == uint32(4294967295) {
+					continue
+				}
+				origintxsha := &txin.PreviousOutpoint.Hash
+
+				txInList = append(txInList, &txin.PreviousOutpoint)
+				txneededList = append(txneededList, origintxsha)
+				txlookupList = append(txlookupList, origintxsha)
+
+				if !db.ExistsTxSha(origintxsha) {
+					t.Errorf("referenced tx not found %v ", origintxsha)
+				}
+
+			}
+			txshaname, _ := tx.TxSha(block.ProtocolVersion())
+			txlookupList = append(txlookupList, &txshaname)
+			txOutList = append(txOutList, &txshaname)
+		}
+
+		txneededmap := map[btcwire.ShaHash]*btcdb.TxListReply{}
+		txlist := db.FetchTxByShaList(txneededList)
+		for _, txe := range txlist {
+			if txe.Err != nil {
+				t.Errorf("tx list fetch failed %v err %v ", txe.Sha, txe.Err)
+				break endtest
+			}
+			txneededmap[*txe.Sha] = txe
+		}
+		for _, spend := range txInList {
+			itxe := txneededmap[spend.Hash]
+			if itxe.TxSpent[spend.Index] == true {
+				t.Errorf("txin %v:%v is already spent", spend.Hash, spend.Index)
+			}
+		}
+
+		newheight, err := db.InsertBlock(block)
+		if err != nil {
+			t.Errorf("failed to insert block %v err %v", height, err)
+			break endtest
+		}
+		if newheight != height {
+			t.Errorf("height mismatch expect %v returned %v", height, newheight)
+			break endtest
+		}
+
+		txlookupmap := map[btcwire.ShaHash]*btcdb.TxListReply{}
+		txlist = db.FetchTxByShaList(txlookupList)
+		for _, txe := range txlist {
+			if txe.Err != nil {
+				t.Errorf("tx list fetch failed %v err %v ", txe.Sha, txe.Err)
+				break endtest
+			}
+			txlookupmap[*txe.Sha] = txe
+		}
+		for _, spend := range txInList {
+			itxe := txlookupmap[spend.Hash]
+			if itxe.TxSpent[spend.Index] == false {
+				fmt.Printf("?? txin %v:%v is unspent %v\n", spend.Hash, spend.Index, itxe.TxSpent)
+				t.Errorf("txin %v:%v is unspent %v", spend.Hash, spend.Index, itxe.TxSpent)
+			}
+		}
+		for _, txo := range txOutList {
+			itxe := txlookupmap[*txo]
+			for i, spent := range itxe.TxSpent {
+				if spent == true {
+					t.Errorf("freshly inserted tx %v already spent %v", txo, i)
+				}
+			}
+
+		}
+		if len(txInList) == 0 {
+			continue
+		}
+		dropblock := blocks[height-1]
+		dropsha, _ := dropblock.Sha()
+
+		err = db.DropAfterBlockBySha(dropsha)
+		if err != nil {
+			t.Errorf("failed to drop block %v err %v", height, err)
+			break endtest
+		}
+
+		txlookupmap = map[btcwire.ShaHash]*btcdb.TxListReply{}
+		txlist = db.FetchTxByShaList(txlookupList)
+		for _, txe := range txlist {
+			if txe.Err != nil {
+				if _, ok := txneededmap[*txe.Sha]; ok {
+					t.Errorf("tx list fetch failed %v err %v ", txe.Sha, txe.Err)
+					break endtest
+				}
+			}
+			txlookupmap[*txe.Sha] = txe
+		}
+		for _, spend := range txInList {
+			itxe := txlookupmap[spend.Hash]
+			if itxe.TxSpent[spend.Index] == true {
+				fmt.Printf("?? txin %v:%v is spent %v\n", spend.Hash, spend.Index, itxe.TxSpent)
+				t.Errorf("txin %v:%v is unspent %v", spend.Hash, spend.Index, itxe.TxSpent)
+			}
+		}
+		newheight, err = db.InsertBlock(block)
+		if err != nil {
+			t.Errorf("failed to insert block %v err %v", height, err)
+			break endtest
+		}
+		txlookupmap = map[btcwire.ShaHash]*btcdb.TxListReply{}
+		txlist = db.FetchTxByShaList(txlookupList)
+		for _, txe := range txlist {
+			if txe.Err != nil {
+				t.Errorf("tx list fetch failed %v err %v ", txe.Sha, txe.Err)
+				break endtest
+			}
+			txlookupmap[*txe.Sha] = txe
+		}
+		for _, spend := range txInList {
+			itxe := txlookupmap[spend.Hash]
+			if itxe.TxSpent[spend.Index] == false {
+				fmt.Printf("?? txin %v:%v is unspent %v\n", spend.Hash, spend.Index, itxe.TxSpent)
+				t.Errorf("txin %v:%v is unspent %v", spend.Hash, spend.Index, itxe.TxSpent)
+			}
+		}
+	}
+}

sqlite3/operational_test.go

@@ -246,7 +246,7 @@ func testBackout(t *testing.T, mode int) {
 	_ = db.ExistsSha(sha)
 	_, err = db.FetchBlockBySha(sha)
 	if err != nil {
-		t.Errorf("failed to load block 99 from db", err)
+		t.Errorf("failed to load block 99 from db %v", err)
 	}
 
 	sha, err = blocks[110].Sha()
@@ -266,7 +266,7 @@ func testBackout(t *testing.T, mode int) {
 	txsha, err := mblock.Transactions[0].TxSha(block.ProtocolVersion())
 	exists := db.ExistsTxSha(&txsha)
 	if exists {
-		t.Errorf("tx %v exists in db, failure expected")
+		t.Errorf("tx %v exists in db, failure expected", txsha)
 	}
 
 	_, _, _, err = db.FetchTxBySha(&txsha)

sqlite3/sqlite.go

@@ -34,9 +34,15 @@ const (
 	txInsertStmt = iota
 	txFetchUsedByShaStmt
 	txFetchLocationByShaStmt
+	txFetchLocUsedByShaStmt
+	txUpdateUsedByShaStmt
+
 	txtmpInsertStmt
 	txtmpFetchUsedByShaStmt
 	txtmpFetchLocationByShaStmt
+	txtmpFetchLocUsedByShaStmt
+	txtmpUpdateUsedByShaStmt
+
 	txMigrateCopy
 	txMigrateClear
 	txMigratePrep
@@ -58,22 +64,28 @@ var blkqueries []string = []string{
 }
 
 var txqueries []string = []string{
-	txInsertStmt:                "INSERT INTO tx (key, blockid, txoff, txlen, data) VALUES(?, ?, ?, ?, ?);",
+	txInsertStmt:             "INSERT INTO tx (key, blockid, txoff, txlen, data) VALUES(?, ?, ?, ?, ?);",
-	txFetchUsedByShaStmt:        "SELECT data FROM tx WHERE key = ?;",
+	txFetchUsedByShaStmt:     "SELECT data FROM tx WHERE key = ?;",
-	txFetchLocationByShaStmt:    "SELECT blockid, txoff, txlen FROM tx WHERE key = ?;",
+	txFetchLocationByShaStmt: "SELECT blockid, txoff, txlen FROM tx WHERE key = ?;",
+	txFetchLocUsedByShaStmt:  "SELECT blockid, txoff, txlen, data FROM tx WHERE key = ?;",
+	txUpdateUsedByShaStmt:    "UPDATE tx SET data = ? WHERE key  = ?;",
+
 	txtmpInsertStmt:             "INSERT INTO txtmp (key, blockid, txoff, txlen, data) VALUES(?, ?, ?, ?, ?);",
 	txtmpFetchUsedByShaStmt:     "SELECT data FROM txtmp WHERE key = ?;",
 	txtmpFetchLocationByShaStmt: "SELECT blockid, txoff, txlen FROM txtmp WHERE key = ?;",
-	txMigrateCopy:               "INSERT INTO tx (key, blockid, txoff, txlen, data) SELECT key, blockid, txoff, txlen, data FROM txtmp;",
+	txtmpFetchLocUsedByShaStmt:  "SELECT blockid, txoff, txlen, data FROM txtmp WHERE key = ?;",
-	txMigrateClear:              "DELETE from txtmp;",
+	txtmpUpdateUsedByShaStmt:    "UPDATE txtmp SET data = ? WHERE key = ?;",
-	txMigratePrep:               "DROP index IF EXISTS uniquetx;",
+
-	txMigrateFinish:             "CREATE UNIQUE INDEX IF NOT EXISTS uniquetx ON tx (key);",
+	txMigrateCopy:      "INSERT INTO tx (key, blockid, txoff, txlen, data) SELECT key, blockid, txoff, txlen, data FROM txtmp;",
-	txMigrateCount:              "SELECT COUNT(*) FROM txtmp;",
+	txMigrateClear:     "DELETE from txtmp;",
-	txPragmaVacuumOn:            "PRAGMA auto_vacuum = FULL;",
+	txMigratePrep:      "DROP index IF EXISTS uniquetx;",
-	txPragmaVacuumOff:           "PRAGMA auto_vacuum = NONE;",
+	txMigrateFinish:    "CREATE UNIQUE INDEX IF NOT EXISTS uniquetx ON tx (key);",
-	txVacuum:                    "VACUUM;",
+	txMigrateCount:     "SELECT COUNT(*) FROM txtmp;",
-	txExistsShaStmt:	     "SELECT blockid FROM tx WHERE key = ?;",
+	txPragmaVacuumOn:   "PRAGMA auto_vacuum = FULL;",
-	txtmpExistsShaStmt:	     "SELECT blockid FROM txtmp WHERE key = ?;",
+	txPragmaVacuumOff:  "PRAGMA auto_vacuum = NONE;",
+	txVacuum:           "VACUUM;",
+	txExistsShaStmt:    "SELECT blockid FROM tx WHERE key = ?;",
+	txtmpExistsShaStmt: "SELECT blockid FROM txtmp WHERE key = ?;",
 }
 
 var log seelog.LoggerInterface = seelog.Disabled
@@ -269,6 +281,8 @@ func newOrCreateSqliteDB(filepath string, create bool) (pbdb btcdb.Db, err error
 
 	bdb.blockCache.maxcount = 150
 	bdb.blockCache.blockMap = map[btcwire.ShaHash]*blockCacheObj{}
+	bdb.blockCache.blockMap = map[btcwire.ShaHash]*blockCacheObj{}
+	bdb.blockCache.blockHeightMap = map[int64]*blockCacheObj{}
 	bdb.txCache.maxcount = 2000
 	bdb.txCache.txMap = map[btcwire.ShaHash]*txCacheObj{}
 
@@ -325,6 +339,8 @@ func (db *SqliteDb) RollbackClose() {
 		err := tx.tx.Rollback()
 		if err != nil {
 			log.Debugf("Rollback failed: %v", err)
+		} else {
+			tx.tx = nil
 		}
 	}
 	db.close()
@@ -477,8 +493,6 @@ func (db *SqliteDb) DropAfterBlockBySha(sha *btcwire.ShaHash) (err error) {
 	db.dbLock.Lock()
 	defer db.dbLock.Unlock()
 
-	db.InvalidateCache()
-
 	// This is a destructive operation and involves multiple requests
 	// so requires a transaction, terminate any transaction to date
 	// and start a new transaction
@@ -491,6 +505,27 @@ func (db *SqliteDb) DropAfterBlockBySha(sha *btcwire.ShaHash) (err error) {
 		return err
 	}
 
+	var startheight int64
+
+	if db.lastBlkShaCached {
+		startheight = db.lastBlkIdx
+	} else {
+		querystr := "SELECT blockid FROM block ORDER BY blockid DESC;"
+
+		tx := &db.txState
+		if tx.tx != nil {
+			row = tx.tx.QueryRow(querystr)
+		} else {
+			row = db.sqldb.QueryRow(querystr)
+		}
+		var startblkidx int64
+		err = row.Scan(&startblkidx)
+		if err != nil {
+			log.Warnf("DropAfterBlockBySha:unable to fetch blockheight %v", err)
+			return err
+		}
+		startheight = startblkidx
+	}
 	// also drop any cached sha data
 	db.lastBlkShaCached = false
 
@@ -499,22 +534,61 @@ func (db *SqliteDb) DropAfterBlockBySha(sha *btcwire.ShaHash) (err error) {
 	tx := &db.txState
 	row = tx.tx.QueryRow(querystr, sha.Bytes())
 
-	var blockidx uint64
+	var keepidx int64
-	err = row.Scan(&blockidx)
+	err = row.Scan(&keepidx)
 	if err != nil {
 		// XXX
 		db.endTx(false)
 		return err
 	}
 
-	_, err = tx.tx.Exec("DELETE FROM txtmp WHERE blockid > ?", blockidx)
+	for height := startheight; height > keepidx; height = height - 1 {
+		var blk *btcutil.Block
+		blkc, ok := db.fetchBlockHeightCache(height)
+
+		if ok {
+			blk = blkc.blk
+		} else {
+			// must load the block from the db
+			sha, err = db.fetchBlockShaByHeight(height - 1)
+			if err != nil {
+				return
+			}
+
+			var buf []byte
+			var pver uint32
+
+			buf, pver, _, err = db.fetchSha(*sha)
+			if err != nil {
+				return
+			}
+
+			blk, err = btcutil.NewBlockFromBytes(buf, pver)
+			if err != nil {
+				return
+			}
+		}
+
+		for _, tx := range blk.MsgBlock().Transactions {
+			err = db.unSpend(tx)
+			if err != nil {
+				return
+			}
+		}
+	}
+
+	// invalidate the cache after possibly using cached entries for block
+	// lookup to unspend coins in them
+	db.InvalidateCache()
+
+	_, err = tx.tx.Exec("DELETE FROM txtmp WHERE blockid > ?", keepidx)
 	if err != nil {
 		// XXX
 		db.endTx(false)
 		return err
 	}
 
-	_, err = tx.tx.Exec("DELETE FROM tx WHERE blockid > ?", blockidx)
+	_, err = tx.tx.Exec("DELETE FROM tx WHERE blockid > ?", keepidx)
 	if err != nil {
 		// XXX
 		db.endTx(false)
@@ -522,7 +596,7 @@ func (db *SqliteDb) DropAfterBlockBySha(sha *btcwire.ShaHash) (err error) {
 	}
 
 	// delete from block last in case of foreign keys
-	_, err = tx.tx.Exec("DELETE FROM block WHERE blockid > ?", blockidx)
+	_, err = tx.tx.Exec("DELETE FROM block WHERE blockid > ?", keepidx)
 	if err != nil {
 		// XXX
 		db.endTx(false)
@@ -604,6 +678,9 @@ func (db *SqliteDb) InsertBlock(block *btcutil.Block) (height int64, err error)
 		}
 		spentbuflen := (len(tx.TxOut) + 7) / 8
 		spentbuf := make([]byte, spentbuflen, spentbuflen)
+		for i := uint(len(tx.TxOut) % 8); i < 8; i++ {
+			spentbuf[spentbuflen-1] |= (byte(1) << i)
+		}
 
 		err = db.insertTx(&txsha, newheight, txloc[txidx].TxStart, txloc[txidx].TxLen, spentbuf)
 		if err != nil {
@@ -612,6 +689,12 @@ func (db *SqliteDb) InsertBlock(block *btcutil.Block) (height int64, err error)
 			oBlkIdx, _, _, err = db.fetchLocationBySha(&txsha)
 			log.Warnf("oblkidx %v err %v", oBlkIdx, err)
 
+			return
+		}
+		err = db.doSpend(tx)
+		if err != nil {
+			log.Warnf("block %v idx %v failed to spend tx %v %v err %v", &blocksha, newheight, &txsha, txidx, err)
+
 			return
 		}
 	}
@@ -675,3 +758,100 @@ func (db *SqliteDb) SetDBInsertMode(newmode btcdb.InsertMode) {
 		db.UseTempTX = false
 	}
 }
+func (db *SqliteDb) doSpend(tx *btcwire.MsgTx) error {
+	for txinidx := range tx.TxIn {
+		txin := tx.TxIn[txinidx]
+
+		inTxSha := txin.PreviousOutpoint.Hash
+		inTxidx := txin.PreviousOutpoint.Index
+
+		if inTxidx == ^uint32(0) {
+			continue
+		}
+
+		//log.Infof("spending %v %v",  &inTxSha, inTxidx)
+
+		err := db.setSpentData(&inTxSha, inTxidx)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (db *SqliteDb) unSpend(tx *btcwire.MsgTx) error {
+	for txinidx := range tx.TxIn {
+		txin := tx.TxIn[txinidx]
+
+		inTxSha := txin.PreviousOutpoint.Hash
+		inTxidx := txin.PreviousOutpoint.Index
+
+		if inTxidx == ^uint32(0) {
+			continue
+		}
+
+		err := db.clearSpentData(&inTxSha, inTxidx)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (db *SqliteDb) setSpentData(sha *btcwire.ShaHash, idx uint32) error {
+	return db.setclearSpentData(sha, idx, true)
+}
+
+func (db *SqliteDb) clearSpentData(sha *btcwire.ShaHash, idx uint32) error {
+	return db.setclearSpentData(sha, idx, false)
+}
+
+func (db *SqliteDb) setclearSpentData(txsha *btcwire.ShaHash, idx uint32, set bool) error {
+	var spentdata []byte
+	usingtmp := false
+	txop := db.txop(txFetchUsedByShaStmt)
+	row := txop.QueryRow(txsha.String())
+	err := row.Scan(&spentdata)
+	if err != nil {
+		// if the error is simply didn't fine continue otherwise
+		// retun failure
+
+		usingtmp = true
+		txop = db.txop(txtmpFetchUsedByShaStmt)
+		row := txop.QueryRow(txsha.String())
+		err := row.Scan(&spentdata)
+		if err != nil {
+			log.Warnf("Failed to locate spent data - %v %v", txsha, err)
+			return err
+		}
+	}
+	byteidx := idx / 8
+	byteoff := idx % 8
+
+	interestingsha := txsha.String() == "866504b0d6242c237e484b49c6a5db1c234e9a1547e96b7ba3d690cabccbf6b0"
+
+	if interestingsha {
+		fmt.Printf("txdata was %v ", spentdata)
+	}
+	if set {
+		spentdata[byteidx] |= (byte(1) << byteoff)
+	} else {
+		spentdata[byteidx] &= ^(byte(1) << byteoff)
+	}
+	txc, cached := db.fetchTxCache(txsha)
+	if cached {
+		txc.spent = spentdata
+	}
+	if interestingsha {
+		fmt.Printf("now %v\n", spentdata)
+	}
+
+	if usingtmp {
+		txop = db.txop(txtmpUpdateUsedByShaStmt)
+	} else {
+		txop = db.txop(txUpdateUsedByShaStmt)
+	}
+	_, err = txop.Exec(spentdata, txsha.String())
+
+	return err
+}

sqlite3/sqliteblock.go

@@ -94,9 +94,6 @@ func (db *SqliteDb) insertBlockData(sha *btcwire.ShaHash, prevSha *btcwire.ShaHa
 func (db *SqliteDb) fetchSha(sha btcwire.ShaHash) (buf []byte, pver uint32,
 	blkid int64, err error) {
 
-	db.dbLock.Lock()
-	defer db.dbLock.Unlock()
-
 	row := db.blkStmts[blkFetchSha].QueryRow(sha.Bytes())
 
 	var blockidx int64
@@ -154,10 +151,17 @@ func (db *SqliteDb) blkExistsSha(sha *btcwire.ShaHash) bool {
 // FetchBlockShaByHeight returns a block hash based on its height in the
 // block chain.
 func (db *SqliteDb) FetchBlockShaByHeight(height int64) (sha *btcwire.ShaHash, err error) {
-	var row *sql.Row
 	db.dbLock.Lock()
 	defer db.dbLock.Unlock()
 
+	return db.fetchBlockShaByHeight(height)
+}
+
+// fetchBlockShaByHeight returns a block hash based on its height in the
+// block chain.
+func (db *SqliteDb) fetchBlockShaByHeight(height int64) (sha *btcwire.ShaHash, err error) {
+	var row *sql.Row
+
 	blockidx := height + 1 // skew between btc blockid and sql
 
 	row = db.blkStmts[blkFetchIdx].QueryRow(blockidx)

sqlite3/sqliteblock_test.go

@@ -1,292 +0,0 @@
-// Copyright (c) 2013 Conformal Systems LLC.
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package sqlite3_test
-
-import (
-	"bytes"
-	"fmt"
-	"github.com/conformal/btcdb"
-	"github.com/conformal/btcdb/sqlite3"
-	"github.com/conformal/btcwire"
-	"os"
-	"testing"
-)
-
-// array of shas
-var testShas []btcwire.ShaHash = []btcwire.ShaHash{
-	{
-		0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
-		0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
-		0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
-		0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
-	},
-	{
-		0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
-		0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
-		0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
-		0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
-	},
-	{
-		0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33,
-		0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33,
-		0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33,
-		0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33,
-	},
-	{
-		0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
-		0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
-		0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
-		0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
-	},
-	{
-		0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
-		0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
-		0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
-		0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
-	},
-}
-
-// Work around stupid go vet bug where any non array should have named
-// initializers. Since ShaHash is a glorified array it shouldn't matter.
-var badShaArray = [32]byte{
-	0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
-	0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
-	0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
-	0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
-}
-var badSha btcwire.ShaHash = btcwire.ShaHash(badShaArray)
-var zeroSha = btcwire.ShaHash{}
-var zeroBlock []byte = make([]byte, 32)
-
-func compareArray(t *testing.T, one, two []btcwire.ShaHash, test string,
-	sync string) {
-	if len(one) != len(two) {
-		t.Errorf("%s: lengths don't match for arrays (%s)", test, sync)
-		return
-	}
-
-	for i := range one {
-		if !one[i].IsEqual(&two[i]) {
-			t.Errorf("%s: %dth sha doesn't match (%s)", test, i,
-				sync)
-		}
-	}
-}
-
-func testNewestSha(t *testing.T, db btcdb.Db, expSha btcwire.ShaHash,
-	expBlk int64, situation string) {
-
-	newestsha, blkid, err := db.NewestSha()
-	if err != nil {
-		t.Errorf("NewestSha failed %v (%s)", err, situation)
-		return
-	}
-	if blkid != expBlk {
-		t.Errorf("NewestSha blkid is %d not %d (%s)", blkid, expBlk,
-			situation)
-	}
-	if !newestsha.IsEqual(&expSha) {
-		t.Errorf("Newestsha isn't the last sha we inserted %v %v (%s)",
-			newestsha, &expSha, situation)
-	}
-}
-
-type fetchIdxTest struct {
-	start int64
-	end   int64
-	exp   []btcwire.ShaHash
-	test  string
-}
-
-func testFetch(t *testing.T, db btcdb.Db, shas []btcwire.ShaHash,
-	sync string) {
-
-	// Test the newest sha is what we expect and call it twice to ensure
-	// caching is working working properly.
-	numShas := int64(len(shas))
-	newestSha := shas[numShas-1]
-	newestBlockID := int64(numShas)
-	testNewestSha(t, db, newestSha, newestBlockID, sync)
-	testNewestSha(t, db, newestSha, newestBlockID, sync+" cached")
-
-	for i, sha := range shas {
-		// Add one for genesis block skew.
-		i = i + 1
-
-		// Ensure the sha exists in the db as expected.
-		if !db.ExistsSha(&sha) {
-			t.Errorf("testSha %d doesn't exists (%s)", i, sync)
-			break
-		}
-
-		// Fetch the sha from the db and ensure all fields are expected
-		// values.
-		buf, pver, idx, err := sqlite3.FetchSha(db, &sha)
-		if err != nil {
-			t.Errorf("Failed to fetch testSha %d (%s)", i, sync)
-		}
-		if !bytes.Equal(zeroBlock, buf) {
-			t.Errorf("testSha %d incorrect block return (%s)", i,
-				sync)
-		}
-		if pver != 1 {
-			t.Errorf("pver is %d and not 1 for testSha %d (%s)",
-				pver, i, sync)
-		}
-		if idx != int64(i) {
-			t.Errorf("index isn't as expected %d vs %d (%s)",
-				idx, i, sync)
-		}
-
-		// Fetch the sha by index and ensure it matches.
-		tsha, err := db.FetchBlockShaByHeight(int64(i))
-		if err != nil {
-			t.Errorf("can't fetch sha at index %d: %v", i, err)
-			continue
-		}
-		if !tsha.IsEqual(&sha) {
-			t.Errorf("sha for index %d isn't shas[%d]", i, i)
-		}
-	}
-
-	endBlockID := numShas + 1
-	midBlockID := endBlockID / 2
-	fetchIdxTests := []fetchIdxTest{
-		// All shas.
-		{1, btcdb.AllShas, shas, "fetch all shas"},
-
-		//// All shas using known bounds.
-		{1, endBlockID, shas, "fetch all shas2"},
-
-		// Partial list starting at beginning.
-		{1, midBlockID, shas[:midBlockID-1], "fetch first half"},
-
-		// Partial list ending at end.
-		{midBlockID, endBlockID, shas[midBlockID-1 : endBlockID-1],
-			"fetch second half"},
-
-		// Nonexistent off the end.
-		{endBlockID, endBlockID * 2, []btcwire.ShaHash{},
-			"fetch nonexistent"},
-	}
-
-	for _, test := range fetchIdxTests {
-		t.Logf("numSha: %d - Fetch from %d to %d\n", numShas, test.start, test.end)
-		if shalist, err := db.FetchHeightRange(test.start, test.end); err == nil {
-			compareArray(t, shalist, test.exp, test.test, sync)
-		} else {
-			t.Errorf("failed to fetch index range for %s (%s)",
-				test.test, sync)
-		}
-	}
-
-	// Try and fetch nonexistent sha.
-	if db.ExistsSha(&badSha) {
-		t.Errorf("nonexistent sha exists (%s)!", sync)
-	}
-	_, _, _, err := sqlite3.FetchSha(db, &badSha)
-	if err == nil {
-		t.Errorf("Success when fetching a bad sha! (%s)", sync)
-	}
-	// XXX if not check to see it is the right value?
-
-	testIterator(t, db, shas, sync)
-}
-
-func testIterator(t *testing.T, db btcdb.Db, shas []btcwire.ShaHash,
-	sync string) {
-
-	// Iterate over the whole list of shas.
-	iter, err := db.NewIterateBlocks()
-	if err != nil {
-		t.Errorf("failed to create iterated blocks")
-		return
-	}
-
-	// Skip the genesis block.
-	_ = iter.NextRow()
-
-	i := 0
-	for ; iter.NextRow(); i++ {
-		key, pver, buf, err := iter.Row()
-		if err != nil {
-			t.Errorf("iter.NextRow() failed: %v (%s)", err, sync)
-			break
-		}
-		if i >= len(shas) {
-			t.Errorf("iterator returned more shas than "+
-				"expected - %d (%s)", i, sync)
-			break
-		}
-		if !key.IsEqual(&shas[i]) {
-			t.Errorf("iterator test: %dth sha doesn't match (%s)",
-				i, sync)
-		}
-		if !bytes.Equal(zeroBlock, buf) {
-			t.Errorf("iterator test: %d buf incorrect (%s)", i,
-				sync)
-		}
-		if pver != 1 {
-			t.Errorf("iterator: %dth pver is %d and not 1 (%s)",
-				i, pver, sync)
-		}
-	}
-	if i < len(shas) {
-		t.Errorf("iterator got no rows on %dth loop, should have %d "+
-			"(%s)", i, len(shas), sync)
-	}
-	if _, _, _, err = iter.Row(); err == nil {
-		t.Errorf("done iterator didn't return failure")
-	}
-	iter.Close()
-}
-
-func TestBdb(t *testing.T) {
-	// Ignore db remove errors since it means we didn't have an old one.
-	_ = os.Remove("tstdb1")
-	db, err := btcdb.CreateDB("sqlite", "tstdb1")
-	if err != nil {
-		t.Errorf("Failed to open test database %v", err)
-		return
-	}
-	defer os.Remove("tstdb1")
-
-	for i := range testShas {
-		var previous btcwire.ShaHash
-		if i == 0 {
-			previous = btcwire.GenesisHash
-		} else {
-			previous = testShas[i-1]
-		}
-		_, err := db.InsertBlockData(&testShas[i], &previous, 1, zeroBlock)
-		if err != nil {
-			t.Errorf("Failed to insert testSha %d.  Error: %v",
-				i, err)
-			return
-		}
-
-		testFetch(t, db, testShas[0:i+1], "pre sync ")
-	}
-
-	// XXX insert enough so that we hit the transaction limit
-	// XXX try and insert a with a bad previous
-
-	db.Sync()
-
-	testFetch(t, db, testShas, "post sync")
-
-	for i := len(testShas) - 1; i >= 0; i-- {
-		err := db.DropAfterBlockBySha(&testShas[i])
-		if err != nil {
-			t.Errorf("drop after %d failed %v", i, err)
-			break
-		}
-		testFetch(t, db, testShas[:i+1],
-			fmt.Sprintf("post DropAfter for sha %d", i))
-	}
-
-	// Just tests that it doesn't crash, no return value
-	db.Close()
-}

sqlite3/sqlitedbcache.go

@@ -7,6 +7,7 @@ package sqlite3
 import (
 	"bytes"
 	"container/list"
+	"fmt"
 	"github.com/conformal/btcdb"
 	"github.com/conformal/btcutil"
 	"github.com/conformal/btcwire"
@@ -27,14 +28,17 @@ type txCacheObj struct {
 	blksha btcwire.ShaHash
 	pver   uint32
 	tx     *btcwire.MsgTx
+	height int64
+	spent  []byte
 	txbuf  []byte
 }
 
 type blockCache struct {
-	maxcount  int
+	maxcount       int
-	fifo      list.List
+	fifo           list.List
-	blockMap  map[btcwire.ShaHash]*blockCacheObj
+	blockMap       map[btcwire.ShaHash]*blockCacheObj
-	cacheLock sync.RWMutex
+	blockHeightMap map[int64]*blockCacheObj
+	cacheLock      sync.RWMutex
 }
 
 type blockCacheObj struct {
@@ -45,6 +49,9 @@ type blockCacheObj struct {
 
 // FetchBlockBySha - return a btcutil Block, object may be a cached.
 func (db *SqliteDb) FetchBlockBySha(sha *btcwire.ShaHash) (blk *btcutil.Block, err error) {
+	db.dbLock.Lock()
+	defer db.dbLock.Unlock()
+
 	blkcache, ok := db.fetchBlockCache(sha)
 	if ok {
 		return blkcache.blk, nil
@@ -78,6 +85,19 @@ func (db *SqliteDb) fetchBlockCache(sha *btcwire.ShaHash) (*blockCacheObj, bool)
 	return blkobj, true
 }
 
+// fetchBlockHeightCache check if a block is in the block cache, if so return it.
+func (db *SqliteDb) fetchBlockHeightCache(height int64) (*blockCacheObj, bool) {
+
+	db.blockCache.cacheLock.RLock()
+	defer db.blockCache.cacheLock.RUnlock()
+
+	blkobj, ok := db.blockCache.blockHeightMap[height]
+	if !ok { // could this just return the map deref?
+		return nil, false
+	}
+	return blkobj, true
+}
+
 // insertBlockCache insert the given sha/block into the cache map.
 // If the block cache is determined to be full, it will release
 // an old entry in FIFO order.
@@ -96,65 +116,85 @@ func (db *SqliteDb) insertBlockCache(sha *btcwire.ShaHash, blk *btcutil.Block) {
 		tailObj, ok := listobj.Value.(*blockCacheObj)
 		if ok {
 			delete(bc.blockMap, tailObj.sha)
+			delete(bc.blockHeightMap, tailObj.blk.Height())
 		} else {
 			panic("invalid type pushed on blockCache list")
 		}
 	}
 
+	bc.blockHeightMap[blk.Height()] = &blkObj
 	bc.blockMap[blkObj.sha] = &blkObj
 }
 
-type TxListReply struct {
-	Sha *btcwire.ShaHash
-	Tx  *btcwire.MsgTx
-	Err error
-}
-
 // FetchTxByShaList given a array of ShaHash, look up the transactions
 // and return them in a TxListReply array.
 func (db *SqliteDb) FetchTxByShaList(txShaList []*btcwire.ShaHash) []*btcdb.TxListReply {
 	var replies []*btcdb.TxListReply
 	for _, txsha := range txShaList {
-		tx, _, _, err := db.FetchTxBySha(txsha)
+		tx, _, _, _, height, txspent, err := db.fetchTxDataBySha(txsha)
-		txlre := btcdb.TxListReply{Sha: txsha, Tx: tx, Err: err}
+		btxspent := []bool{}
+		if err == nil {
+			btxspent = make([]bool, len(tx.TxOut), len(tx.TxOut))
+			for idx := range tx.TxOut {
+				byteidx := idx / 8
+				byteoff := uint(idx % 8)
+				btxspent[idx] = (txspent[byteidx] & (byte(1) << byteoff)) != 0
+			}
+		}
+		interestingsha := txsha.String() == "866504b0d6242c237e484b49c6a5db1c234e9a1547e96b7ba3d690cabccbf6b"
+		if interestingsha {
+			fmt.Printf("usage of sha %v is %v\n", txsha, btxspent)
+		}
+		fmt.Printf("usage of sha %v is %v\n", txsha, btxspent)
+		txlre := btcdb.TxListReply{Sha: txsha, Tx: tx, Height: height, TxSpent: btxspent, Err: err}
 		replies = append(replies, &txlre)
 	}
 	return replies
 }
 
-// FetchTxAllBySha returns several pieces of data regarding the given sha.
+// fetchTxDataBySha returns several pieces of data regarding the given sha.
-func (db *SqliteDb) FetchTxAllBySha(txsha *btcwire.ShaHash) (rtx *btcwire.MsgTx, rtxbuf []byte, rpver uint32, rblksha *btcwire.ShaHash, err error) {
+func (db *SqliteDb) fetchTxDataBySha(txsha *btcwire.ShaHash) (rtx *btcwire.MsgTx, rtxbuf []byte, rpver uint32, rblksha *btcwire.ShaHash, rheight int64, rtxspent []byte, err error) {
+
+	var pver uint32
+	var blksha *btcwire.ShaHash
+	var height int64
+	var txspent []byte
+	var toff int
+	var tlen int
+	var blk *btcutil.Block
+	var blkbuf []byte
 
 	// Check Tx cache
 	if txc, ok := db.fetchTxCache(txsha); ok {
-		return txc.tx, txc.txbuf, txc.pver, &txc.blksha, nil
+		if txc.spent != nil {
+			return txc.tx, txc.txbuf, txc.pver, &txc.blksha, txc.height, txc.spent, nil
+		}
 	}
 
 	// If not cached load it
-	bidx, toff, tlen, err := db.FetchLocationBySha(txsha)
+	height, toff, tlen, txspent, err = db.fetchLocationUsedBySha(txsha)
 	if err != nil {
-		log.Warnf("unable to find location of origin tx %v", txsha)
 		return
 	}
 
-	blksha, err := db.FetchBlockShaByHeight(bidx)
+	blksha, err = db.FetchBlockShaByHeight(height)
 	if err != nil {
-		log.Warnf("block idx lookup %v to %v", bidx, err)
+		log.Warnf("block idx lookup %v to %v", height, err)
 		return
 	}
 	log.Tracef("transaction %v is at block %v %v tx %v",
-		txsha, blksha, bidx, toff)
+		txsha, blksha, height, toff)
 
-	blk, err := db.FetchBlockBySha(blksha)
+	blk, err = db.FetchBlockBySha(blksha)
 	if err != nil {
 		log.Warnf("unable to fetch block %v %v ",
-			bidx, &blksha)
+			height, &blksha)
 		return
 	}
 
-	blkbuf, pver, err := blk.Bytes()
+	blkbuf, pver, err = blk.Bytes()
 	if err != nil {
-		log.Warnf("unable to decode block %v %v", bidx, &blksha)
+		log.Warnf("unable to decode block %v %v", height, &blksha)
 		return
 	}
 
@@ -166,7 +206,7 @@ func (db *SqliteDb) FetchTxAllBySha(txsha *btcwire.ShaHash) (rtx *btcwire.MsgTx,
 	err = tx.BtcDecode(rbuf, pver)
 	if err != nil {
 		log.Warnf("unable to decode tx block %v %v txoff %v txlen %v",
-			bidx, &blksha, toff, tlen)
+			height, &blksha, toff, tlen)
 		return
 	}
 
@@ -177,6 +217,76 @@ func (db *SqliteDb) FetchTxAllBySha(txsha *btcwire.ShaHash) (rtx *btcwire.MsgTx,
 	txc.tx = &tx
 	txc.txbuf = txbuf
 	txc.pver = pver
+	txc.height = height
+	txc.spent = txspent
+	txc.blksha = *blksha
+	db.insertTxCache(&txc)
+
+	return &tx, txbuf, pver, blksha, height, txspent, nil
+}
+
+// FetchTxAllBySha returns several pieces of data regarding the given sha.
+func (db *SqliteDb) FetchTxAllBySha(txsha *btcwire.ShaHash) (rtx *btcwire.MsgTx, rtxbuf []byte, rpver uint32, rblksha *btcwire.ShaHash, err error) {
+	var pver uint32
+	var blksha *btcwire.ShaHash
+	var height int64
+	var toff int
+	var tlen int
+	var blk *btcutil.Block
+	var blkbuf []byte
+
+	// Check Tx cache
+	if txc, ok := db.fetchTxCache(txsha); ok {
+		return txc.tx, txc.txbuf, txc.pver, &txc.blksha, nil
+	}
+
+	// If not cached load it
+	height, toff, tlen, err = db.FetchLocationBySha(txsha)
+	if err != nil {
+		return
+	}
+
+	blksha, err = db.FetchBlockShaByHeight(height)
+	if err != nil {
+		log.Warnf("block idx lookup %v to %v", height, err)
+		return
+	}
+	log.Tracef("transaction %v is at block %v %v tx %v",
+		txsha, blksha, height, toff)
+
+	blk, err = db.FetchBlockBySha(blksha)
+	if err != nil {
+		log.Warnf("unable to fetch block %v %v ",
+			height, &blksha)
+		return
+	}
+
+	blkbuf, pver, err = blk.Bytes()
+	if err != nil {
+		log.Warnf("unable to decode block %v %v", height, &blksha)
+		return
+	}
+
+	txbuf := make([]byte, tlen)
+	copy(txbuf[:], blkbuf[toff:toff+tlen])
+	rbuf := bytes.NewBuffer(txbuf)
+
+	var tx btcwire.MsgTx
+	err = tx.BtcDecode(rbuf, pver)
+	if err != nil {
+		log.Warnf("unable to decode tx block %v %v txoff %v txlen %v",
+			height, &blksha, toff, tlen)
+		return
+	}
+
+	// Shove data into TxCache
+	// XXX -
+	var txc txCacheObj
+	txc.sha = *txsha
+	txc.tx = &tx
+	txc.txbuf = txbuf
+	txc.pver = pver
+	txc.height = height
 	txc.blksha = *blksha
 	db.insertTxCache(&txc)
 
@@ -251,6 +361,7 @@ func (db *SqliteDb) InvalidateBlockCache() {
 	bc.cacheLock.Lock()
 	defer bc.cacheLock.Unlock()
 	bc.blockMap = map[btcwire.ShaHash]*blockCacheObj{}
+	bc.blockHeightMap = map[int64]*blockCacheObj{}
 	bc.fifo = list.List{}
 }
 

sqlite3/sqlitetx.go

@@ -12,16 +12,16 @@ import (
 )
 
 // InsertTx inserts a tx hash and its associated data into the database.
-func (db *SqliteDb) InsertTx(txsha *btcwire.ShaHash, blockidx int64, txoff int, txlen int, usedbuf []byte) (err error) {
+func (db *SqliteDb) InsertTx(txsha *btcwire.ShaHash, height int64, txoff int, txlen int, usedbuf []byte) (err error) {
 	db.dbLock.Lock()
 	defer db.dbLock.Unlock()
 
-	return db.insertTx(txsha, blockidx, txoff, txlen, usedbuf)
+	return db.insertTx(txsha, height, txoff, txlen, usedbuf)
 }
 
 // insertTx inserts a tx hash and its associated data into the database.
 // Must be called with db lock held.
-func (db *SqliteDb) insertTx(txsha *btcwire.ShaHash, blockidx int64, txoff int, txlen int, usedbuf []byte) (err error) {
+func (db *SqliteDb) insertTx(txsha *btcwire.ShaHash, height int64, txoff int, txlen int, usedbuf []byte) (err error) {
 
 	tx := &db.txState
 	if tx.tx == nil {
@@ -30,7 +30,7 @@ func (db *SqliteDb) insertTx(txsha *btcwire.ShaHash, blockidx int64, txoff int,
 			return
 		}
 	}
-	blockid := blockidx + 1
+	blockid := height + 1
 	txd := tTxInsertData{txsha: txsha, blockid: blockid, txoff: txoff, txlen: txlen, usedbuf: usedbuf}
 
 	log.Tracef("inserting tx %v for block %v off %v len %v",
@@ -84,7 +84,6 @@ func (db *SqliteDb) ExistsTxSha(txsha *btcwire.ShaHash) (exists bool) {
 	return db.existsTxSha(txsha)
 }
 
-
 // existsTxSha returns if the given tx sha exists in the database.o
 // Must be called with the db lock held.
 func (db *SqliteDb) existsTxSha(txsha *btcwire.ShaHash) (exists bool) {
@@ -126,7 +125,7 @@ func (db *SqliteDb) FetchLocationBySha(txsha *btcwire.ShaHash) (blockidx int64,
 
 // fetchLocationBySha look up the Tx sha information by name.
 // Must be called with db lock held.
-func (db *SqliteDb) fetchLocationBySha(txsha *btcwire.ShaHash) (blockidx int64, txoff int, txlen int, err error) {
+func (db *SqliteDb) fetchLocationBySha(txsha *btcwire.ShaHash) (height int64, txoff int, txlen int, err error) {
 	var row *sql.Row
 	var blockid int64
 	var ttxoff int
@@ -156,12 +155,49 @@ func (db *SqliteDb) fetchLocationBySha(txsha *btcwire.ShaHash) (blockidx int64,
 		log.Warnf("FetchLocationBySha: fail %v", err)
 		return
 	}
-	blockidx = blockid - 1
+	height = blockid - 1
 	txoff = ttxoff
 	txlen = ttxlen
 	return
 }
 
+// fetchLocationUsedBySha look up the Tx sha information by name.
+// Must be called with db lock held.
+func (db *SqliteDb) fetchLocationUsedBySha(txsha *btcwire.ShaHash) (rheight int64, rtxoff int, rtxlen int, rspentbuf []byte, err error) {
+	var row *sql.Row
+	var blockid int64
+	var txoff int
+	var txlen int
+	var txspent []byte
+
+	rowBytes := txsha.String()
+	txop := db.txop(txFetchLocUsedByShaStmt)
+	row = txop.QueryRow(rowBytes)
+
+	err = row.Scan(&blockid, &txoff, &txlen, &txspent)
+	if err == sql.ErrNoRows {
+		txop = db.txop(txtmpFetchLocUsedByShaStmt)
+		row = txop.QueryRow(rowBytes)
+
+		err = row.Scan(&blockid, &txoff, &txlen, &txspent)
+		if err == sql.ErrNoRows {
+			err = btcdb.TxShaMissing
+			return
+		}
+		if err != nil {
+			log.Warnf("txtmp FetchLocationBySha: fail %v",
+				err)
+			return
+		}
+	}
+	if err != nil {
+		log.Warnf("FetchLocationBySha: fail %v", err)
+		return
+	}
+	height := blockid - 1
+	return height, txoff, txlen, txspent, nil
+}
+
 // FetchTxUsedBySha returns the used/spent buffer for a given transaction.
 func (db *SqliteDb) FetchTxUsedBySha(txsha *btcwire.ShaHash) (spentbuf []byte, err error) {
 	var row *sql.Row