// TicketDbThumbprint takes all the tickets in the respective ticket db,
// sorts them, hashes their contents into a list, and then hashes that list.
// The resultant hash is the thumbprint of the ticket database, and should
// be the same across all clients that are synced to the same block. Returns
// an array of hashes len 3, containing (1) live tickets (2) spent tickets
// and (3) missed tickets.
// Do NOT use on mainnet or in production. For debug use only! Make sure
// the blockchain is frozen when you call this function.
func TicketDbThumbprint(tmdb *stake.TicketDB, chainParams *chaincfg.Params) ([]*chainhash.Hash, error) {
// Container for the three master hashes to go into.
dbThumbprints := make([]*chainhash.Hash, 3, 3)
// (1) Live tickets.
allLiveTickets := stake.NewTicketDataSliceEmpty()
for i := 0; i < stake.BucketsSize; i++ {
bucketTickets, err := tmdb.DumpLiveTickets(uint8(i))
if err != nil {
return nil, err
}
for _, td := range bucketTickets {
allLiveTickets = append(allLiveTickets, td)
}
}
// Sort by the number data hash, since we already have this implemented
// and it's also unique.
sort.Sort(allLiveTickets)
// Create a buffer, dump all the data into it, and hash.
var buf bytes.Buffer
for _, td := range allLiveTickets {
writeTicketDataToBuf(&buf, td)
}
liveHash := chainhash.HashFunc(buf.Bytes())
liveThumbprint, err := chainhash.NewHash(liveHash[:])
if err != nil {
return nil, err
}
dbThumbprints[0] = liveThumbprint
// (2) Spent tickets.
height := tmdb.GetTopBlock()
allSpentTickets := stake.NewTicketDataSliceEmpty()
for i := int64(chainParams.StakeEnabledHeight); i <= height; i++ {
bucketTickets, err := tmdb.DumpSpentTickets(i)
if err != nil {
return nil, err
}
for _, td := range bucketTickets {
allSpentTickets = append(allSpentTickets, td)
}
}
sort.Sort(allSpentTickets)
buf.Reset() // Flush buffer
for _, td := range allSpentTickets {
writeTicketDataToBuf(&buf, td)
}
spentHash := chainhash.HashFunc(buf.Bytes())
spentThumbprint, err := chainhash.NewHash(spentHash[:])
if err != nil {
return nil, err
}
dbThumbprints[1] = spentThumbprint
// (3) Missed tickets.
allMissedTickets := stake.NewTicketDataSliceEmpty()
missedTickets, err := tmdb.DumpMissedTickets()
if err != nil {
return nil, err
}
for _, td := range missedTickets {
allMissedTickets = append(allMissedTickets, td)
}
sort.Sort(allMissedTickets)
buf.Reset() // Flush buffer
missedHash := chainhash.HashFunc(buf.Bytes())
missedThumbprint, err := chainhash.NewHash(missedHash[:])
if err != nil {
return nil, err
}
dbThumbprints[2] = missedThumbprint
return dbThumbprints, nil
}
func (s *Store) debugBucketUnspentString(ns walletdb.ReadBucket,
inclUnmined bool) (string, error) {
var unspent []*unspentDebugData
var op wire.OutPoint
var block Block
err := ns.NestedReadBucket(bucketUnspent).ForEach(func(k, v []byte) error {
err := readCanonicalOutPoint(k, &op)
if err != nil {
return err
}
existsUnmined := false
if existsRawUnminedInput(ns, k) != nil {
// Skip including unmined if specified.
if !inclUnmined {
return nil
}
existsUnmined = true
}
err = readUnspentBlock(v, &block)
if err != nil {
return err
}
thisUnspentOutput := &unspentDebugData{
op,
existsUnmined,
block.Hash,
block.Height,
}
unspent = append(unspent, thisUnspentOutput)
return nil
})
if err != nil {
if _, ok := err.(Error); ok {
return "", err
}
str := "failed iterating unspent bucket"
return "", storeError(ErrDatabase, str, err)
}
sort.Sort(ByOutpoint(unspent))
var buffer bytes.Buffer
str := fmt.Sprintf("Unspent outputs\n\n")
buffer.WriteString(str)
// Create a buffer, dump all the data into it, and hash.
var thumbprintBuf bytes.Buffer
for _, udd := range unspent {
str = fmt.Sprintf("Hash: %v, Index: %v, Tree: %v, Unmined: %v, "+
"Block: %v, Block height: %v\n",
udd.outPoint.Hash,
udd.outPoint.Index,
udd.outPoint.Tree,
udd.unmined,
udd.block,
udd.blockHeight)
buffer.WriteString(str)
writeUnspentDebugDataToBuf(&thumbprintBuf, udd)
}
unspentHash := chainhash.HashFunc(thumbprintBuf.Bytes())
unspentThumbprint, err := chainhash.NewHash(unspentHash[:])
if err != nil {
return "", err
}
str = fmt.Sprintf("\nUnspent outputs thumbprint: %v",
unspentThumbprint)
buffer.WriteString(str)
return buffer.String(), nil
}