func verifyChain(db btcdb.Db, level, depth int32) error {
_, curheight64, err := db.NewestSha()
if err != nil {
rpcsLog.Errorf("Verify is unable to fetch current block "+
"height: %v", err)
}
curheight := int32(curheight64)
if depth > curheight {
depth = curheight
}
for height := curheight; height > (curheight - depth); height-- {
// Level 0 just looks up the block.
sha, err := db.FetchBlockShaByHeight(int64(height))
if err != nil {
rpcsLog.Errorf("Verify is unable to fetch block at "+
"height %d: %v", height, err)
return err
}
block, err := db.FetchBlockBySha(sha)
if err != nil {
rpcsLog.Errorf("Verify is unable to fetch block at "+
"sha %v height %d: %v", sha, height, err)
return err
}
// Level 1 does basic chain sanity checks.
if level > 0 {
err := btcchain.CheckBlockSanity(block,
activeNetParams.powLimit)
if err != nil {
rpcsLog.Errorf("Verify is unable to "+
"validate block at sha %v height "+
"%d: %v", sha, height, err)
return err
}
}
}
rpcsLog.Infof("Chain verify completed successfully")
return nil
}
func DumpBlock(db btcdb.Db, height int64, fo io.Writer, rflag bool, fflag bool, tflag bool) error {
sha, err := db.FetchBlockShaByHeight(height)
if err != nil {
return err
}
blk, err := db.FetchBlockBySha(sha)
if err != nil {
log.Warnf("Failed to fetch block %v, err %v", sha, err)
return err
}
rblk, err := blk.Bytes()
blkid := blk.Height()
if rflag {
log.Infof("Block %v depth %v %v", sha, blkid, spew.Sdump(rblk))
}
mblk := blk.MsgBlock()
if fflag {
log.Infof("Block %v depth %v %v", sha, blkid, spew.Sdump(mblk))
}
if tflag {
log.Infof("Num transactions %v", len(mblk.Transactions))
for i, tx := range mblk.Transactions {
txsha, err := tx.TxSha()
if err != nil {
continue
}
log.Infof("tx %v: %v", i, &txsha)
}
}
if fo != nil {
// generate and write header values
binary.Write(fo, binary.LittleEndian, uint32(btcwire.MainNet))
binary.Write(fo, binary.LittleEndian, uint32(len(rblk)))
// write block
fo.Write(rblk)
}
return nil
}
func fetch(db btcdb.Db, rd *rData) error {
sha, err := db.FetchBlockShaByHeight(rd.in.H)
if err != nil {
return fmt.Errorf("failed FetchBlockShaByHeight(%v): %v\n", rd.in.H, err)
}
blk, err := db.FetchBlockBySha(sha)
if err != nil {
return fmt.Errorf("failed FetchBlockBySha(%v) - h %v: %v\n", sha, rd.in.H, err)
}
tx := blk.Transactions()[rd.in.Tx]
rd.blkSha = sha
rd.blk = blk
rd.tx = tx
rd.txInIndex = rd.in.TxIn
rd.txIn = tx.MsgTx().TxIn[rd.in.TxIn]
txPrevList, err := db.FetchTxBySha(&rd.txIn.PreviousOutPoint.Hash)
if err != nil {
return fmt.Errorf("failed FetchTxBySha(%v) - h %v: %v\n",
rd.txIn.PreviousOutPoint.Hash, rd.in.H, err)
}
if len(txPrevList) != 1 {
return fmt.Errorf("not single FetchTxBySha(%v) - h %v: %v\n",
rd.txIn.PreviousOutPoint.Hash, rd.in.H, len(txPrevList))
}
blkPrev, err := db.FetchBlockBySha(txPrevList[0].BlkSha)
if err != nil {
return fmt.Errorf("failed prev FetchBlockBySha(%v) - h %v: %v\n",
txPrevList[0].BlkSha, rd.in.H, err)
}
rd.txPrev = txPrevList[0]
rd.txPrevOutIndex = rd.txIn.PreviousOutPoint.Index
rd.txPrevOut = rd.txPrev.Tx.TxOut[rd.txPrevOutIndex]
rd.blkPrev = blkPrev
return nil
}
func getHeight(db btcdb.Db, str string) (int64, error) {
argtype, idx, sha, err := parsesha(str)
if err != nil {
log.Warnf("unable to decode [%v] %v", str, err)
return 0, err
}
switch argtype {
case ArgSha:
// nothing to do
blk, err := db.FetchBlockBySha(sha)
if err != nil {
log.Warnf("unable to locate block sha %v err %v",
sha, err)
return 0, err
}
idx = blk.Height()
case ArgHeight:
}
return idx, nil
}
// findCandidates searches the chain backwards for checkpoint candidates and
// returns a slice of found candidates, if any. It also stops searching for
// candidates at the last checkpoint that is already hard coded into btcchain
// since there is no point in finding candidates before already existing
// checkpoints.
func findCandidates(db btcdb.Db, latestHash *btcwire.ShaHash) ([]*btcchain.Checkpoint, error) {
// Start with the latest block of the main chain.
block, err := db.FetchBlockBySha(latestHash)
if err != nil {
return nil, err
}
// Setup chain and get the latest checkpoint. Ignore notifications
// since they aren't needed for this util.
chain := btcchain.New(db, activeNetwork, nil)
latestCheckpoint := chain.LatestCheckpoint()
if latestCheckpoint == nil {
return nil, fmt.Errorf("unable to retrieve latest checkpoint")
}
// The latest known block must be at least the last known checkpoint
// plus required checkpoint confirmations.
checkpointConfirmations := int64(btcchain.CheckpointConfirmations)
requiredHeight := latestCheckpoint.Height + checkpointConfirmations
if block.Height() < requiredHeight {
return nil, fmt.Errorf("the block database is only at height "+
"%d which is less than the latest checkpoint height "+
"of %d plus required confirmations of %d",
block.Height(), latestCheckpoint.Height,
checkpointConfirmations)
}
// Indeterminate progress setup.
numBlocksToTest := block.Height() - requiredHeight
progressInterval := (numBlocksToTest / 100) + 1 // min 1
fmt.Print("Searching for candidates")
defer fmt.Println()
// Loop backwards through the chain to find checkpoint candidates.
var candidates []*btcchain.Checkpoint
numTested := int64(0)
for len(candidates) < cfg.NumCandidates && block.Height() > requiredHeight {
// Display progress.
if numTested%progressInterval == 0 {
fmt.Print(".")
}
// Determine if this block is a checkpoint candidate.
isCandidate, err := chain.IsCheckpointCandidate(block)
if err != nil {
return nil, err
}
// All checks passed, so this node seems like a reasonable
// checkpoint candidate.
if isCandidate {
candidateHash, err := block.Sha()
if err != nil {
return nil, err
}
checkpoint := btcchain.Checkpoint{
Height: block.Height(),
Hash: candidateHash,
}
candidates = append(candidates, &checkpoint)
}
prevHash := &block.MsgBlock().Header.PrevBlock
block, err = db.FetchBlockBySha(prevHash)
if err != nil {
return nil, err
}
numTested++
}
return candidates, nil
}
func getSignatures(maxHeigth int64, log btclog.Logger, db btcdb.Db) chan *rData {
heigthChan := make(chan int64)
blockChan := make(chan *btcutil.Block)
sigChan := make(chan *rData)
go func() {
for h := int64(0); h < maxHeigth; h++ {
heigthChan <- h
}
close(heigthChan)
}()
var blockWg sync.WaitGroup
for i := 0; i <= 10; i++ {
blockWg.Add(1)
go func() {
for h := range heigthChan {
sha, err := db.FetchBlockShaByHeight(h)
if err != nil {
log.Warnf("failed FetchBlockShaByHeight(%v): %v", h, err)
return
}
blk, err := db.FetchBlockBySha(sha)
if err != nil {
log.Warnf("failed FetchBlockBySha(%v) - h %v: %v", sha, h, err)
return
}
blockChan <- blk
}
blockWg.Done()
}()
}
go func() {
blockWg.Wait()
close(blockChan)
}()
var sigWg sync.WaitGroup
for i := 0; i <= 10; i++ {
sigWg.Add(1)
go func() {
for blk := range blockChan {
mblk := blk.MsgBlock()
for i, tx := range mblk.Transactions {
if btcchain.IsCoinBase(btcutil.NewTx(tx)) {
continue
}
for t, txin := range tx.TxIn {
dataSlice, err := btcscript.PushedData(txin.SignatureScript)
if err != nil {
continue
}
for d, data := range dataSlice {
signature, err := btcec.ParseSignature(data, btcec.S256())
if err != nil {
continue
}
sigChan <- &rData{
sig: signature,
H: blk.Height(),
Tx: i,
TxIn: t,
Data: d,
}
}
}
}
}
sigWg.Done()
}()
}
go func() {
sigWg.Wait()
close(sigChan)
}()
return sigChan
}
