// TestReorganization loads a set of test blocks which force a chain
// reorganization to test the block chain handling code.
// The test blocks were originally from a post on the bitcoin talk forums:
// https://bitcointalk.org/index.php?topic=46370.msg577556#msg577556
func TestReorganization(t *testing.T) {
	// Intentionally load the side chain blocks out of order to ensure
	// orphans are handled properly along with chain reorganization.
	testFiles := []string{
		"blk_0_to_4.dat.bz2",
		"blk_4A.dat.bz2",
		"blk_5A.dat.bz2",
		"blk_3A.dat.bz2",
	}

	var blocks []*btcutil.Block
	for _, file := range testFiles {
		blockTmp, err := loadBlocks(file)
		if err != nil {
			t.Errorf("Error loading file: %v\n", err)
		}
		for _, block := range blockTmp {
			blocks = append(blocks, block)
		}
	}

	t.Logf("Number of blocks: %v\n", len(blocks))

	// Create a new database and chain instance to run tests against.
	chain, teardownFunc, err := chainSetup("reorg")
	if err != nil {
		t.Errorf("Failed to setup chain instance: %v", err)
		return
	}
	defer teardownFunc()

	// Since we're not dealing with the real block chain, disable
	// checkpoints and set the coinbase maturity to 1.
	chain.DisableCheckpoints(true)
	blockchain.TstSetCoinbaseMaturity(1)

	timeSource := blockchain.NewMedianTime()
	expectedOrphans := map[int]struct{}{5: struct{}{}, 6: struct{}{}}
	for i := 1; i < len(blocks); i++ {
		isOrphan, err := chain.ProcessBlock(blocks[i], timeSource, blockchain.BFNone)
		if err != nil {
			t.Errorf("ProcessBlock fail on block %v: %v\n", i, err)
			return
		}
		if _, ok := expectedOrphans[i]; !ok && isOrphan {
			t.Errorf("ProcessBlock incorrectly returned block %v "+
				"is an orphan\n", i)
		}
	}

	return
}
Exemple #2
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// newBlockImporter returns a new importer for the provided file reader seeker
// and database.
func newBlockImporter(db database.Db, r io.ReadSeeker) *blockImporter {
	return &blockImporter{
		db:           db,
		r:            r,
		processQueue: make(chan []byte, 2),
		doneChan:     make(chan bool),
		errChan:      make(chan error),
		quit:         make(chan struct{}),
		chain:        blockchain.New(db, activeNetParams, nil),
		medianTime:   blockchain.NewMedianTime(),
		lastLogTime:  time.Now(),
	}
}
Exemple #3
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// This example demonstrates how to create a new chain instance and use
// ProcessBlock to attempt to attempt add a block to the chain.  As the package
// overview documentation describes, this includes all of the Bitcoin consensus
// rules.  This example intentionally attempts to insert a duplicate genesis
// block to illustrate how an invalid block is handled.
func ExampleBlockChain_ProcessBlock() {
	// Create a new database to store the accepted blocks into.  Typically
	// this would be opening an existing database and would not use memdb
	// which is a memory-only database backend, but we create a new db
	// here so this is a complete working example.
	db, err := database.CreateDB("memdb")
	if err != nil {
		fmt.Printf("Failed to create database: %v\n", err)
		return
	}
	defer db.Close()

	// Insert the main network genesis block.  This is part of the initial
	// database setup.  Like above, this typically would not be needed when
	// opening an existing database.
	genesisBlock := btcutil.NewBlock(btcnet.MainNetParams.GenesisBlock)
	_, err = db.InsertBlock(genesisBlock)
	if err != nil {
		fmt.Printf("Failed to insert genesis block: %v\n", err)
		return
	}

	// Create a new BlockChain instance using the underlying database for
	// the main bitcoin network and ignore notifications.
	chain := blockchain.New(db, &btcnet.MainNetParams, nil)

	// Create a new median time source that is required by the upcoming
	// call to ProcessBlock.  Ordinarily this would also add time values
	// obtained from other peers on the network so the local time is
	// adjusted to be in agreement with other peers.
	timeSource := blockchain.NewMedianTime()

	// Process a block.  For this example, we are going to intentionally
	// cause an error by trying to process the genesis block which already
	// exists.
	isOrphan, err := chain.ProcessBlock(genesisBlock, timeSource, blockchain.BFNone)
	if err != nil {
		fmt.Printf("Failed to process block: %v\n", err)
		return
	}
	fmt.Printf("Block accepted. Is it an orphan?: %v", isOrphan)

	// Output:
	// Failed to process block: already have block 000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
}
Exemple #4
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// TestCheckBlockSanity tests the CheckBlockSanity function to ensure it works
// as expected.
func TestCheckBlockSanity(t *testing.T) {
	powLimit := btcnet.MainNetParams.PowLimit
	block := btcutil.NewBlock(&Block100000)
	timeSource := blockchain.NewMedianTime()
	err := blockchain.CheckBlockSanity(block, powLimit, timeSource)
	if err != nil {
		t.Errorf("CheckBlockSanity: %v", err)
	}

	// Ensure a block that has a timestamp with a precision higher than one
	// second fails.
	timestamp := block.MsgBlock().Header.Timestamp
	block.MsgBlock().Header.Timestamp = timestamp.Add(time.Nanosecond)
	err = blockchain.CheckBlockSanity(block, powLimit, timeSource)
	if err == nil {
		t.Errorf("CheckBlockSanity: error is nil when it shouldn't be")
	}
}
// TestMedianTime tests the medianTime implementation.
func TestMedianTime(t *testing.T) {
	tests := []struct {
		in         []int64
		wantOffset int64
		useDupID   bool
	}{
		// Not enough samples must result in an offset of 0.
		{in: []int64{1}, wantOffset: 0},
		{in: []int64{1, 2}, wantOffset: 0},
		{in: []int64{1, 2, 3}, wantOffset: 0},
		{in: []int64{1, 2, 3, 4}, wantOffset: 0},

		// Various number of entries.  The expected offset is only
		// updated on odd number of elements.
		{in: []int64{-13, 57, -4, -23, -12}, wantOffset: -12},
		{in: []int64{55, -13, 61, -52, 39, 55}, wantOffset: 39},
		{in: []int64{-62, -58, -30, -62, 51, -30, 15}, wantOffset: -30},
		{in: []int64{29, -47, 39, 54, 42, 41, 8, -33}, wantOffset: 39},
		{in: []int64{37, 54, 9, -21, -56, -36, 5, -11, -39}, wantOffset: -11},
		{in: []int64{57, -28, 25, -39, 9, 63, -16, 19, -60, 25}, wantOffset: 9},
		{in: []int64{-5, -4, -3, -2, -1}, wantOffset: -3, useDupID: true},

		// The offset stops being updated once the max number of entries
		// has been reached.  This is actually a bug from Bitcoin Core,
		// but since the time is ultimately used as a part of the
		// consensus rules, it must be mirrored.
		{in: []int64{-67, 67, -50, 24, 63, 17, 58, -14, 5, -32, -52}, wantOffset: 17},
		{in: []int64{-67, 67, -50, 24, 63, 17, 58, -14, 5, -32, -52, 45}, wantOffset: 17},
		{in: []int64{-67, 67, -50, 24, 63, 17, 58, -14, 5, -32, -52, 45, 4}, wantOffset: 17},

		// Offsets that are too far away from the local time should
		// be ignored.
		{in: []int64{-4201, 4202, -4203, 4204, -4205}, wantOffset: 0},

		// Excerise the condition where the median offset is greater
		// than the max allowed adjustment, but there is at least one
		// sample that is close enough to the current time to avoid
		// triggering a warning about an invalid local clock.
		{in: []int64{4201, 4202, 4203, 4204, -299}, wantOffset: 0},
	}

	// Modify the max number of allowed median time entries for these tests.
	blockchain.TstSetMaxMedianTimeEntries(10)
	defer blockchain.TstSetMaxMedianTimeEntries(200)

	for i, test := range tests {
		filter := blockchain.NewMedianTime()
		for j, offset := range test.in {
			id := strconv.Itoa(j)
			now := time.Unix(time.Now().Unix(), 0)
			tOffset := now.Add(time.Duration(offset) * time.Second)
			filter.AddTimeSample(id, tOffset)

			// Ensure the duplicate IDs are ignored.
			if test.useDupID {
				// Modify the offsets to ensure the final median
				// would be different if the duplicate is added.
				tOffset = tOffset.Add(time.Duration(offset) *
					time.Second)
				filter.AddTimeSample(id, tOffset)
			}
		}

		// Since it is possible that the time.Now call in AddTimeSample
		// and the time.Now calls here in the tests will be off by one
		// second, allow a fudge factor to compensate.
		gotOffset := filter.Offset()
		wantOffset := time.Duration(test.wantOffset) * time.Second
		wantOffset2 := time.Duration(test.wantOffset-1) * time.Second
		if gotOffset != wantOffset && gotOffset != wantOffset2 {
			t.Errorf("Offset #%d: unexpected offset -- got %v, "+
				"want %v or %v", i, gotOffset, wantOffset,
				wantOffset2)
			continue
		}

		// Since it is possible that the time.Now call in AdjustedTime
		// and the time.Now call here in the tests will be off by one
		// second, allow a fudge factor to compensate.
		adjustedTime := filter.AdjustedTime()
		now := time.Unix(time.Now().Unix(), 0)
		wantTime := now.Add(filter.Offset())
		wantTime2 := now.Add(filter.Offset() - time.Second)
		if !adjustedTime.Equal(wantTime) && !adjustedTime.Equal(wantTime2) {
			t.Errorf("AdjustedTime #%d: unexpected result -- got %v, "+
				"want %v or %v", i, adjustedTime, wantTime,
				wantTime2)
			continue
		}
	}
}
Exemple #6
0
// TestHaveBlock tests the HaveBlock API to ensure proper functionality.
func TestHaveBlock(t *testing.T) {
	// Load up blocks such that there is a side chain.
	// (genesis block) -> 1 -> 2 -> 3 -> 4
	//                          \-> 3a
	testFiles := []string{
		"blk_0_to_4.dat.bz2",
		"blk_3A.dat.bz2",
	}

	var blocks []*btcutil.Block
	for _, file := range testFiles {
		blockTmp, err := loadBlocks(file)
		if err != nil {
			t.Errorf("Error loading file: %v\n", err)
			return
		}
		for _, block := range blockTmp {
			blocks = append(blocks, block)
		}
	}

	// Create a new database and chain instance to run tests against.
	chain, teardownFunc, err := chainSetup("haveblock")
	if err != nil {
		t.Errorf("Failed to setup chain instance: %v", err)
		return
	}
	defer teardownFunc()

	// Since we're not dealing with the real block chain, disable
	// checkpoints and set the coinbase maturity to 1.
	chain.DisableCheckpoints(true)
	blockchain.TstSetCoinbaseMaturity(1)

	timeSource := blockchain.NewMedianTime()
	for i := 1; i < len(blocks); i++ {
		isOrphan, err := chain.ProcessBlock(blocks[i], timeSource,
			blockchain.BFNone)
		if err != nil {
			t.Errorf("ProcessBlock fail on block %v: %v\n", i, err)
			return
		}
		if isOrphan {
			t.Errorf("ProcessBlock incorrectly returned block %v "+
				"is an orphan\n", i)
			return
		}
	}

	// Insert an orphan block.
	isOrphan, err := chain.ProcessBlock(btcutil.NewBlock(&Block100000),
		timeSource, blockchain.BFNone)
	if err != nil {
		t.Errorf("Unable to process block: %v", err)
		return
	}
	if !isOrphan {
		t.Errorf("ProcessBlock indicated block is an not orphan when " +
			"it should be\n")
		return
	}

	tests := []struct {
		hash string
		want bool
	}{
		// Genesis block should be present (in the main chain).
		{hash: btcnet.MainNetParams.GenesisHash.String(), want: true},

		// Block 3a should be present (on a side chain).
		{hash: "00000000474284d20067a4d33f6a02284e6ef70764a3a26d6a5b9df52ef663dd", want: true},

		// Block 100000 should be present (as an orphan).
		{hash: "000000000003ba27aa200b1cecaad478d2b00432346c3f1f3986da1afd33e506", want: true},

		// Random hashes should not be availble.
		{hash: "123", want: false},
	}

	for i, test := range tests {
		hash, err := btcwire.NewShaHashFromStr(test.hash)
		if err != nil {
			t.Errorf("NewShaHashFromStr: %v", err)
			continue
		}

		result, err := chain.HaveBlock(hash)
		if err != nil {
			t.Errorf("HaveBlock #%d unexpected error: %v", i, err)
			return
		}
		if result != test.want {
			t.Errorf("HaveBlock #%d got %v want %v", i, result,
				test.want)
			continue
		}
	}
}
Exemple #7
0
// newServer returns a new pointcoind server configured to listen on addr for the
// bitcoin network type specified by netParams.  Use start to begin accepting
// connections from peers.
func newServer(listenAddrs []string, db database.Db, netParams *btcnet.Params) (*server, error) {
	nonce, err := btcwire.RandomUint64()
	if err != nil {
		return nil, err
	}

	amgr := addrmgr.New(cfg.DataDir, pointcoindLookup)

	var listeners []net.Listener
	var nat NAT
	if !cfg.DisableListen {
		ipv4Addrs, ipv6Addrs, wildcard, err :=
			parseListeners(listenAddrs)
		if err != nil {
			return nil, err
		}
		listeners = make([]net.Listener, 0, len(ipv4Addrs)+len(ipv6Addrs))
		discover := true
		if len(cfg.ExternalIPs) != 0 {
			discover = false
			// if this fails we have real issues.
			port, _ := strconv.ParseUint(
				activeNetParams.DefaultPort, 10, 16)

			for _, sip := range cfg.ExternalIPs {
				eport := uint16(port)
				host, portstr, err := net.SplitHostPort(sip)
				if err != nil {
					// no port, use default.
					host = sip
				} else {
					port, err := strconv.ParseUint(
						portstr, 10, 16)
					if err != nil {
						srvrLog.Warnf("Can not parse "+
							"port from %s for "+
							"externalip: %v", sip,
							err)
						continue
					}
					eport = uint16(port)
				}
				na, err := amgr.HostToNetAddress(host, eport,
					btcwire.SFNodeNetwork)
				if err != nil {
					srvrLog.Warnf("Not adding %s as "+
						"externalip: %v", sip, err)
					continue
				}

				err = amgr.AddLocalAddress(na, addrmgr.ManualPrio)
				if err != nil {
					amgrLog.Warnf("Skipping specified external IP: %v", err)
				}
			}
		} else if discover && cfg.Upnp {
			nat, err = Discover()
			if err != nil {
				srvrLog.Warnf("Can't discover upnp: %v", err)
			}
			// nil nat here is fine, just means no upnp on network.
		}

		// TODO(oga) nonstandard port...
		if wildcard {
			port, err :=
				strconv.ParseUint(activeNetParams.DefaultPort,
					10, 16)
			if err != nil {
				// I can't think of a cleaner way to do this...
				goto nowc
			}
			addrs, err := net.InterfaceAddrs()
			for _, a := range addrs {
				ip, _, err := net.ParseCIDR(a.String())
				if err != nil {
					continue
				}
				na := btcwire.NewNetAddressIPPort(ip,
					uint16(port), btcwire.SFNodeNetwork)
				if discover {
					err = amgr.AddLocalAddress(na, addrmgr.InterfacePrio)
					if err != nil {
						amgrLog.Debugf("Skipping local address: %v", err)
					}
				}
			}
		}
	nowc:

		for _, addr := range ipv4Addrs {
			listener, err := net.Listen("tcp4", addr)
			if err != nil {
				srvrLog.Warnf("Can't listen on %s: %v", addr,
					err)
				continue
			}
			listeners = append(listeners, listener)

			if discover {
				if na, err := amgr.DeserializeNetAddress(addr); err == nil {
					err = amgr.AddLocalAddress(na, addrmgr.BoundPrio)
					if err != nil {
						amgrLog.Warnf("Skipping bound address: %v", err)
					}
				}
			}
		}

		for _, addr := range ipv6Addrs {
			listener, err := net.Listen("tcp6", addr)
			if err != nil {
				srvrLog.Warnf("Can't listen on %s: %v", addr,
					err)
				continue
			}
			listeners = append(listeners, listener)
			if discover {
				if na, err := amgr.DeserializeNetAddress(addr); err == nil {
					err = amgr.AddLocalAddress(na, addrmgr.BoundPrio)
					if err != nil {
						amgrLog.Debugf("Skipping bound address: %v", err)
					}
				}
			}
		}

		if len(listeners) == 0 {
			return nil, errors.New("no valid listen address")
		}
	}

	s := server{
		nonce:                nonce,
		listeners:            listeners,
		netParams:            netParams,
		addrManager:          amgr,
		newPeers:             make(chan *peer, cfg.MaxPeers),
		donePeers:            make(chan *peer, cfg.MaxPeers),
		banPeers:             make(chan *peer, cfg.MaxPeers),
		wakeup:               make(chan struct{}),
		query:                make(chan interface{}),
		relayInv:             make(chan relayMsg, cfg.MaxPeers),
		broadcast:            make(chan broadcastMsg, cfg.MaxPeers),
		quit:                 make(chan struct{}),
		modifyRebroadcastInv: make(chan interface{}),
		nat:                  nat,
		db:                   db,
		timeSource:           blockchain.NewMedianTime(),
	}
	bm, err := newBlockManager(&s)
	if err != nil {
		return nil, err
	}
	s.blockManager = bm
	s.txMemPool = newTxMemPool(&s)

	if !cfg.DisableRPC {
		s.rpcServer, err = newRPCServer(cfg.RPCListeners, &s)
		if err != nil {
			return nil, err
		}
	}

	return &s, nil
}