Golang TicketDB.DumpMissedTickets方法代码示例

// DebugTicketDBMissedString prints out the contents of the missed ticket
// database to a string. If verbose is indicated, the ticket data itself
// is printed along with the ticket hashes.
func DebugTicketDBMissedString(tmdb *stake.TicketDB, verbose bool) (string, error) {
	var buffer bytes.Buffer

	str := fmt.Sprintf("Contents of missed ticket database:\n")
	buffer.WriteString(str)

	bucketTickets, err := tmdb.DumpMissedTickets()
	if err != nil {
		return "", err
	}

	for hash, td := range bucketTickets {
		str = fmt.Sprintf("%v\n", hash)
		buffer.WriteString(str)

		if verbose {
			str = fmt.Sprintf("%v\n", DebugTicketDataString(td))
			buffer.WriteString(str)
		}
	}

	return buffer.String(), nil
}

// 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
}

//.........这里部分代码省略.........
			// Create snapshot of tmdb at block 168
			CopyOfMapsAtBlock168, err = cloneTicketDB(&tmdb)
			if err != nil {
				t.Errorf("db cloning at block 168 failure! %v", err)
			}
		}
	}

	// Remove five blocks from HEAD~1
	_, _, _, err = tmdb.RemoveBlockToHeight(50)
	if err != nil {
		t.Errorf("error: %v", err)
	}

	// Test if the roll back was symmetric to the earlier snapshot
	if !reflect.DeepEqual(tmdb.DumpMapsPointer(), CopyOfMapsAtBlock50) {
		t.Errorf("The td did not restore to a previous block height correctly!")
	}

	// Test rescanning a ticket db
	err = tmdb.RescanTicketDB()
	if err != nil {
		t.Errorf("rescanticketdb err: %v", err.Error())
	}

	// Test if the db file storage was symmetric to the earlier snapshot
	if !reflect.DeepEqual(tmdb.DumpMapsPointer(), CopyOfMapsAtBlock168) {
		t.Errorf("The td did not rescan to HEAD correctly!")
	}

	err = os.Mkdir("testdata/", os.FileMode(0700))
	if err != nil {
		t.Error(err)
	}

	// Store the ticket db to disk
	err = tmdb.Store("testdata/", "testtmdb")
	if err != nil {
		t.Errorf("error: %v", err)
	}

	var tmdb2 stake.TicketDB
	err = tmdb2.LoadTicketDBs("testdata/", "testtmdb", simNetParams, database)
	if err != nil {
		t.Errorf("error: %v", err)
	}

	// Test if the db file storage was symmetric to previously rescanned one
	if !reflect.DeepEqual(tmdb.DumpMapsPointer(), tmdb2.DumpMapsPointer()) {
		t.Errorf("The td did not rescan to a previous block height correctly!")
	}

	tmdb2.Close()

	// Test dumping missing tickets from block 152
	missedIn152, _ := chainhash.NewHashFromStr(
		"84f7f866b0af1cc278cb8e0b2b76024a07542512c76487c83628c14c650de4fa")

	tmdb.RemoveBlockToHeight(152)

	missedTix, err := tmdb.DumpMissedTickets()
	if err != nil {
		t.Errorf("err dumping missed tix: %v", err.Error())
	}

	if _, exists := missedTix[*missedIn152]; !exists {
		t.Errorf("couldn't finding missed tx 1 %v in tmdb @ block 152!",
			missedIn152)
	}

	tmdb.RescanTicketDB()

	// Make sure that the revoked map contains the revoked tx
	revokedSlice := []*chainhash.Hash{missedIn152}

	revokedTix, err := tmdb.DumpRevokedTickets()
	if err != nil {
		t.Errorf("err dumping missed tix: %v", err.Error())
	}

	if len(revokedTix) != 1 {
		t.Errorf("revoked ticket map is wrong len, got %v, want %v",
			len(revokedTix), 1)
	}

	_, wasMissedIn152 := revokedTix[*revokedSlice[0]]
	ticketsRevoked := wasMissedIn152
	if !ticketsRevoked {
		t.Errorf("revoked ticket map did not include tickets missed in " +
			"block 152 and later revoked")
	}

	database.Close()
	tmdb.Close()

	os.RemoveAll("ticketdb_test")
	os.Remove("./ticketdb_test.ver")
	os.Remove("testdata/testtmdb")
	os.Remove("testdata")
}