Exemple #1
0
// session creates a test bitswap session.
//
// NB: It's easy make mistakes by providing the same peer ID to two different
// sessions. To safeguard, use the SessionGenerator to generate sessions. It's
// just a much better idea.
func Session(ctx context.Context, net tn.Network, p testutil.Identity) Instance {
	bsdelay := delay.Fixed(0)
	const bloomSize = 512
	const writeCacheElems = 100

	adapter := net.Adapter(p)
	dstore := ds_sync.MutexWrap(datastore2.WithDelay(ds.NewMapDatastore(), bsdelay))

	bstore, err := blockstore.CachedBlockstore(blockstore.NewBlockstore(
		ds_sync.MutexWrap(dstore)), ctx, blockstore.DefaultCacheOpts())
	if err != nil {
		panic(err.Error()) // FIXME perhaps change signature and return error.
	}

	const alwaysSendToPeer = true

	bs := New(ctx, p.ID(), adapter, bstore, alwaysSendToPeer).(*Bitswap)

	return Instance{
		Peer:            p.ID(),
		Exchange:        bs,
		blockstore:      bstore,
		blockstoreDelay: bsdelay,
	}
}
Exemple #2
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func TestRoutingResolve(t *testing.T) {
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	serv := mockrouting.NewServer()
	id := testutil.RandIdentityOrFatal(t)
	d := serv.ClientWithDatastore(context.Background(), id, dstore)

	resolver := NewRoutingResolver(d, 0)
	publisher := NewRoutingPublisher(d, dstore)

	privk, pubk, err := testutil.RandTestKeyPair(512)
	if err != nil {
		t.Fatal(err)
	}

	h := path.FromString("/ipfs/QmZULkCELmmk5XNfCgTnCyFgAVxBRBXyDHGGMVoLFLiXEN")
	err = publisher.Publish(context.Background(), privk, h)
	if err != nil {
		t.Fatal(err)
	}

	pubkb, err := pubk.Bytes()
	if err != nil {
		t.Fatal(err)
	}

	pkhash := u.Hash(pubkb)
	res, err := resolver.Resolve(context.Background(), key.Key(pkhash).B58String())
	if err != nil {
		t.Fatal(err)
	}

	if res != h {
		t.Fatal("Got back incorrect value.")
	}
}
Exemple #3
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func TestDuplicateSemantics(t *testing.T) {
	ctx := context.Background()
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	bstore := blockstore.NewBlockstore(dstore)
	bserv := bs.New(bstore, offline.Exchange(bstore))

	dserv := mdag.NewDAGService(bserv)

	// TODO does pinner need to share datastore with blockservice?
	p := NewPinner(dstore, dserv, dserv)

	a, _ := randNode()
	_, err := dserv.Add(a)
	if err != nil {
		t.Fatal(err)
	}

	// pin is recursively
	err = p.Pin(ctx, a, true)
	if err != nil {
		t.Fatal(err)
	}

	// pinning directly should fail
	err = p.Pin(ctx, a, false)
	if err == nil {
		t.Fatal("expected direct pin to fail")
	}

	// pinning recursively again should succeed
	err = p.Pin(ctx, a, true)
	if err != nil {
		t.Fatal(err)
	}
}
Exemple #4
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func TestReturnsErrorWhenSizeNegative(t *testing.T) {
	bs := NewBlockstore(syncds.MutexWrap(ds.NewMapDatastore()))
	_, err := bloomCached(bs, context.TODO(), -1, 1)
	if err == nil {
		t.Fail()
	}
}
Exemple #5
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func TestPutManyAddsToBloom(t *testing.T) {
	bs := NewBlockstore(syncds.MutexWrap(ds.NewMapDatastore()))

	ctx, _ := context.WithTimeout(context.Background(), 1*time.Second)
	cachedbs, err := testBloomCached(bs, ctx)

	select {
	case <-cachedbs.rebuildChan:
	case <-ctx.Done():
		t.Fatalf("Timeout wating for rebuild: %d", cachedbs.bloom.ElementsAdded())
	}

	block1 := blocks.NewBlock([]byte("foo"))
	block2 := blocks.NewBlock([]byte("bar"))

	cachedbs.PutMany([]blocks.Block{block1})
	has, err := cachedbs.Has(block1.Cid())
	if err != nil {
		t.Fatal(err)
	}
	if has == false {
		t.Fatal("added block is reported missing")
	}

	has, err = cachedbs.Has(block2.Cid())
	if err != nil {
		t.Fatal(err)
	}
	if has == true {
		t.Fatal("not added block is reported to be in blockstore")
	}
}
Exemple #6
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func (cfg *BuildCfg) fillDefaults() error {
	if cfg.Repo != nil && cfg.NilRepo {
		return errors.New("cannot set a repo and specify nilrepo at the same time")
	}

	if cfg.Repo == nil {
		var d ds.Datastore
		d = ds.NewMapDatastore()
		if cfg.NilRepo {
			d = ds.NewNullDatastore()
		}
		r, err := defaultRepo(dsync.MutexWrap(d))
		if err != nil {
			return err
		}
		cfg.Repo = r
	}

	if cfg.Routing == nil {
		cfg.Routing = DHTOption
	}

	if cfg.Host == nil {
		cfg.Host = DefaultHostOption
	}

	return nil
}
Exemple #7
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func runFileCattingWorker(ctx context.Context, n *core.IpfsNode) error {
	conf, err := config.Init(ioutil.Discard, *nBitsForKeypair)
	if err != nil {
		return err
	}

	r := &repo.Mock{
		D: ds2.CloserWrap(syncds.MutexWrap(datastore.NewMapDatastore())),
		C: *conf,
	}
	dummy, err := core.NewNode(ctx, &core.BuildCfg{
		Repo: r,
	})
	if err != nil {
		return err
	}

	errs := make(chan error)

	go func() {
		defer dummy.Close()
		var i int64 = 1
		for {
			buf := new(bytes.Buffer)
			if err := random.WritePseudoRandomBytes(sizeOfIthFile(i), buf, *seed); err != nil {
				errs <- err
			}
			// add to a dummy node to discover the key
			k, err := coreunix.Add(dummy, bytes.NewReader(buf.Bytes()))
			if err != nil {
				errs <- err
			}
			e := elog.EventBegin(ctx, "cat", logging.LoggableF(func() map[string]interface{} {
				return map[string]interface{}{
					"key":       k,
					"localPeer": n.Identity,
				}
			}))
			if r, err := coreunix.Cat(ctx, n, k); err != nil {
				e.Done()
				log.Printf("failed to cat file. seed: %d #%d key: %s err: %s", *seed, i, k, err)
			} else {
				log.Println("found file", "seed", *seed, "#", i, "key", k, "size", unit.Information(sizeOfIthFile(i)))
				io.Copy(ioutil.Discard, r)
				e.Done()
				log.Println("catted file", "seed", *seed, "#", i, "key", k, "size", unit.Information(sizeOfIthFile(i)))
				i++
			}
			time.Sleep(time.Second)
		}
	}()

	err = <-errs
	if err != nil {
		log.Fatal(err)
	}

	return nil
}
Exemple #8
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func getMockDagServAndBstore(t testing.TB) (mdag.DAGService, blockstore.Blockstore) {
	dstore := ds.NewMapDatastore()
	tsds := sync.MutexWrap(dstore)
	bstore := blockstore.NewBlockstore(tsds)
	bserv := bs.New(bstore, offline.Exchange(bstore))
	dserv := mdag.NewDAGService(bserv)
	return dserv, bstore
}
Exemple #9
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func newEngine(ctx context.Context, idStr string) peerAndEngine {
	return peerAndEngine{
		Peer: peer.ID(idStr),
		//Strategy: New(true),
		Engine: NewEngine(ctx,
			blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))),
	}
}
Exemple #10
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func createStores(t *testing.T) (*arccache, *blockstore, *callbackDatastore) {
	cd := &callbackDatastore{f: func() {}, ds: ds.NewMapDatastore()}
	bs := NewBlockstore(syncds.MutexWrap(cd))
	arc, err := testArcCached(bs, nil)
	if err != nil {
		t.Fatal(err)
	}
	return arc, bs, cd
}
Exemple #11
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func TestHasIsBloomCached(t *testing.T) {
	cd := &callbackDatastore{f: func() {}, ds: ds.NewMapDatastore()}
	bs := NewBlockstore(syncds.MutexWrap(cd))

	for i := 0; i < 1000; i++ {
		bs.Put(blocks.NewBlock([]byte(fmt.Sprintf("data: %d", i))))
	}
	ctx, _ := context.WithTimeout(context.Background(), 1*time.Second)
	cachedbs, err := testBloomCached(bs, ctx)
	if err != nil {
		t.Fatal(err)
	}

	select {
	case <-cachedbs.rebuildChan:
	case <-ctx.Done():
		t.Fatalf("Timeout wating for rebuild: %d", cachedbs.bloom.ElementsAdded())
	}

	cacheFails := 0
	cd.SetFunc(func() {
		cacheFails++
	})

	for i := 0; i < 1000; i++ {
		cachedbs.Has(blocks.NewBlock([]byte(fmt.Sprintf("data: %d", i+2000))).Cid())
	}

	if float64(cacheFails)/float64(1000) > float64(0.05) {
		t.Fatal("Bloom filter has cache miss rate of more than 5%")
	}

	cacheFails = 0
	block := blocks.NewBlock([]byte("newBlock"))

	cachedbs.PutMany([]blocks.Block{block})
	if cacheFails != 2 {
		t.Fatalf("expected two datastore hits: %d", cacheFails)
	}
	cachedbs.Put(block)
	if cacheFails != 3 {
		t.Fatalf("expected datastore hit: %d", cacheFails)
	}

	if has, err := cachedbs.Has(block.Cid()); !has || err != nil {
		t.Fatal("has gave wrong response")
	}

	bl, err := cachedbs.Get(block.Cid())
	if bl.String() != block.String() {
		t.Fatal("block data doesn't match")
	}

	if err != nil {
		t.Fatal("there should't be an error")
	}
}
Exemple #12
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func (rs *mocknetserver) ClientWithDatastore(ctx context.Context, p testutil.Identity, ds ds.Datastore) Client {

	// FIXME AddPeer doesn't appear to be idempotent

	host, err := rs.mn.AddPeer(p.PrivateKey(), p.Address())
	if err != nil {
		panic("FIXME")
	}
	return dht.NewDHT(ctx, host, sync.MutexWrap(ds))
}
Exemple #13
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func InitializeSupernodeNetwork(
	ctx context.Context,
	numServers, numClients int,
	conf testutil.LatencyConfig) ([]*core.IpfsNode, []*core.IpfsNode, error) {

	// create network
	mn := mocknet.New(ctx)

	mn.SetLinkDefaults(mocknet.LinkOptions{
		Latency:   conf.NetworkLatency,
		Bandwidth: math.MaxInt32,
	})

	routingDatastore := ds2.CloserWrap(syncds.MutexWrap(datastore.NewMapDatastore()))
	var servers []*core.IpfsNode
	for i := 0; i < numServers; i++ {
		bootstrap, err := core.NewNode(ctx, &core.BuildCfg{
			Online:  true,
			Host:    mock.MockHostOption(mn),
			Routing: corerouting.SupernodeServer(routingDatastore),
		})
		if err != nil {
			return nil, nil, err
		}
		servers = append(servers, bootstrap)
	}

	var bootstrapInfos []pstore.PeerInfo
	for _, n := range servers {
		info := n.Peerstore.PeerInfo(n.PeerHost.ID())
		bootstrapInfos = append(bootstrapInfos, info)
	}

	var clients []*core.IpfsNode
	for i := 0; i < numClients; i++ {
		n, err := core.NewNode(ctx, &core.BuildCfg{
			Online:  true,
			Host:    mock.MockHostOption(mn),
			Routing: corerouting.SupernodeClient(bootstrapInfos...),
		})
		if err != nil {
			return nil, nil, err
		}
		clients = append(clients, n)
	}
	mn.LinkAll()

	bcfg := core.BootstrapConfigWithPeers(bootstrapInfos)
	for _, n := range clients {
		if err := n.Bootstrap(bcfg); err != nil {
			return nil, nil, err
		}
	}
	return servers, clients, nil
}
Exemple #14
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func TestWriteThroughWorks(t *testing.T) {
	bstore := &PutCountingBlockstore{
		blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())),
		0,
	}
	bstore2 := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))
	exch := offline.Exchange(bstore2)
	bserv := NewWriteThrough(bstore, exch)
	bgen := butil.NewBlockGenerator()

	block := bgen.Next()

	t.Logf("PutCounter: %d", bstore.PutCounter)
	bserv.AddBlock(block)
	if bstore.PutCounter != 1 {
		t.Fatalf("expected just one Put call, have: %d", bstore.PutCounter)
	}

	bserv.AddBlock(block)
	if bstore.PutCounter != 2 {
		t.Fatal("Put should have called again, should be 2 is: %d", bstore.PutCounter)
	}
}
Exemple #15
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func TestFlush(t *testing.T) {
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	bstore := blockstore.NewBlockstore(dstore)
	bserv := bs.New(bstore, offline.Exchange(bstore))

	dserv := mdag.NewDAGService(bserv)
	p := NewPinner(dstore, dserv, dserv)
	_, k := randNode()

	p.PinWithMode(k, Recursive)
	if err := p.Flush(); err != nil {
		t.Fatal(err)
	}
	assertPinned(t, p, k, "expected key to still be pinned")
}
Exemple #16
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func TestOutboxClosedWhenEngineClosed(t *testing.T) {
	t.SkipNow() // TODO implement *Engine.Close
	e := NewEngine(context.Background(), blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())))
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		for nextEnvelope := range e.Outbox() {
			<-nextEnvelope
		}
		wg.Done()
	}()
	// e.Close()
	wg.Wait()
	if _, ok := <-e.Outbox(); ok {
		t.Fatal("channel should be closed")
	}
}
Exemple #17
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func TestPartnerWantsThenCancels(t *testing.T) {
	numRounds := 10
	if testing.Short() {
		numRounds = 1
	}
	alphabet := strings.Split("abcdefghijklmnopqrstuvwxyz", "")
	vowels := strings.Split("aeiou", "")

	type testCase [][]string
	testcases := []testCase{
		{
			alphabet, vowels,
		},
		{
			alphabet, stringsComplement(alphabet, vowels),
		},
	}

	bs := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))
	for _, letter := range alphabet {
		block := blocks.NewBlock([]byte(letter))
		if err := bs.Put(block); err != nil {
			t.Fatal(err)
		}
	}

	for i := 0; i < numRounds; i++ {
		for _, testcase := range testcases {
			set := testcase[0]
			cancels := testcase[1]
			keeps := stringsComplement(set, cancels)

			e := NewEngine(context.Background(), bs)
			partner := testutil.RandPeerIDFatal(t)

			partnerWants(e, set, partner)
			partnerCancels(e, cancels, partner)
			if err := checkHandledInOrder(t, e, keeps); err != nil {
				t.Logf("run #%d of %d", i, numRounds)
				t.Fatal(err)
			}
		}
	}
}
Exemple #18
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func TestPinRecursiveFail(t *testing.T) {
	ctx := context.Background()
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	bstore := blockstore.NewBlockstore(dstore)
	bserv := bs.New(bstore, offline.Exchange(bstore))
	dserv := mdag.NewDAGService(bserv)

	p := NewPinner(dstore, dserv, dserv)

	a, _ := randNode()
	b, _ := randNode()
	err := a.AddNodeLinkClean("child", b)
	if err != nil {
		t.Fatal(err)
	}

	// NOTE: This isnt a time based test, we expect the pin to fail
	mctx, _ := context.WithTimeout(ctx, time.Millisecond)
	err = p.Pin(mctx, a, true)
	if err == nil {
		t.Fatal("should have failed to pin here")
	}

	_, err = dserv.Add(b)
	if err != nil {
		t.Fatal(err)
	}

	_, err = dserv.Add(a)
	if err != nil {
		t.Fatal(err)
	}

	// this one is time based... but shouldnt cause any issues
	mctx, _ = context.WithTimeout(ctx, time.Second)
	err = p.Pin(mctx, a, true)
	if err != nil {
		t.Fatal(err)
	}
}
Exemple #19
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func TestBlocks(t *testing.T) {
	bstore := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))
	bs := New(bstore, offline.Exchange(bstore))
	defer bs.Close()

	o := newObject([]byte("beep boop"))
	h := cid.NewCidV0(u.Hash([]byte("beep boop")))
	if !o.Cid().Equals(h) {
		t.Error("Block key and data multihash key not equal")
	}

	k, err := bs.AddBlock(o)
	if err != nil {
		t.Error("failed to add block to BlockService", err)
		return
	}

	if !k.Equals(o.Cid()) {
		t.Error("returned key is not equal to block key", err)
	}

	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
	defer cancel()
	b2, err := bs.GetBlock(ctx, o.Cid())
	if err != nil {
		t.Error("failed to retrieve block from BlockService", err)
		return
	}

	if !o.Cid().Equals(b2.Cid()) {
		t.Error("Block keys not equal.")
	}

	if !bytes.Equal(o.RawData(), b2.RawData()) {
		t.Error("Block data is not equal.")
	}
}
Exemple #20
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func MockCmdsCtx() (commands.Context, error) {
	// Generate Identity
	ident, err := testutil.RandIdentity()
	if err != nil {
		return commands.Context{}, err
	}
	p := ident.ID()

	conf := config.Config{
		Identity: config.Identity{
			PeerID: p.String(),
		},
	}

	r := &repo.Mock{
		D: ds2.CloserWrap(syncds.MutexWrap(datastore.NewMapDatastore())),
		C: conf,
	}

	node, err := core.NewNode(context.Background(), &core.BuildCfg{
		Repo: r,
	})
	if err != nil {
		return commands.Context{}, err
	}

	return commands.Context{
		Online:     true,
		ConfigRoot: "/tmp/.mockipfsconfig",
		LoadConfig: func(path string) (*config.Config, error) {
			return &conf, nil
		},
		ConstructNode: func() (*core.IpfsNode, error) {
			return node, nil
		},
	}, nil
}
Exemple #21
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func TestPrexistingRecord(t *testing.T) {
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	d := mockrouting.NewServer().ClientWithDatastore(context.Background(), testutil.RandIdentityOrFatal(t), dstore)

	resolver := NewRoutingResolver(d, 0)
	publisher := NewRoutingPublisher(d, dstore)

	privk, pubk, err := testutil.RandTestKeyPair(512)
	if err != nil {
		t.Fatal(err)
	}

	id, err := peer.IDFromPublicKey(pubk)
	if err != nil {
		t.Fatal(err)
	}

	// Make a good record and put it in the datastore
	h := path.FromString("/ipfs/QmZULkCELmmk5XNfCgTnCyFgAVxBRBXyDHGGMVoLFLiXEN")
	eol := time.Now().Add(time.Hour)
	err = PutRecordToRouting(context.Background(), privk, h, 0, eol, d, id)
	if err != nil {
		t.Fatal(err)
	}

	// Now, with an old record in the system already, try and publish a new one
	err = publisher.Publish(context.Background(), privk, h)
	if err != nil {
		t.Fatal(err)
	}

	err = verifyCanResolve(resolver, id.Pretty(), h)
	if err != nil {
		t.Fatal(err)
	}
}
Exemple #22
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func TestReprovide(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	mrserv := mock.NewServer()

	idA := testutil.RandIdentityOrFatal(t)
	idB := testutil.RandIdentityOrFatal(t)

	clA := mrserv.Client(idA)
	clB := mrserv.Client(idB)

	bstore := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))

	blk := blocks.NewBlock([]byte("this is a test"))
	bstore.Put(blk)

	reprov := NewReprovider(clA, bstore)
	err := reprov.Reprovide(ctx)
	if err != nil {
		t.Fatal(err)
	}

	provs, err := clB.FindProviders(ctx, blk.Cid())
	if err != nil {
		t.Fatal(err)
	}

	if len(provs) == 0 {
		t.Fatal("Should have gotten a provider")
	}

	if provs[0].ID != idA.ID() {
		t.Fatal("Somehow got the wrong peer back as a provider.")
	}
}
Exemple #23
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func (rs *s) Client(p testutil.Identity) Client {
	return rs.ClientWithDatastore(context.Background(), p, dssync.MutexWrap(ds.NewMapDatastore()))
}
Exemple #24
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func NewMemoryDagService() dag.DAGService {
	// build mem-datastore for editor's intermediary nodes
	bs := bstore.NewBlockstore(syncds.MutexWrap(ds.NewMapDatastore()))
	bsrv := bserv.New(bs, offline.Exchange(bs))
	return dag.NewDAGService(bsrv)
}
Exemple #25
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func ThreadSafeCloserMapDatastore() ds2.ThreadSafeDatastoreCloser {
	return ds2.CloserWrap(syncds.MutexWrap(datastore.NewMapDatastore()))
}
Exemple #26
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func getDagserv(t *testing.T) merkledag.DAGService {
	db := dssync.MutexWrap(ds.NewMapDatastore())
	bs := bstore.NewBlockstore(db)
	blockserv := bserv.New(bs, offline.Exchange(bs))
	return merkledag.NewDAGService(blockserv)
}
Exemple #27
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func TestPinnerBasic(t *testing.T) {
	ctx := context.Background()

	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	bstore := blockstore.NewBlockstore(dstore)
	bserv := bs.New(bstore, offline.Exchange(bstore))

	dserv := mdag.NewDAGService(bserv)

	// TODO does pinner need to share datastore with blockservice?
	p := NewPinner(dstore, dserv, dserv)

	a, ak := randNode()
	_, err := dserv.Add(a)
	if err != nil {
		t.Fatal(err)
	}

	// Pin A{}
	err = p.Pin(ctx, a, false)
	if err != nil {
		t.Fatal(err)
	}

	assertPinned(t, p, ak, "Failed to find key")

	// create new node c, to be indirectly pinned through b
	c, _ := randNode()
	ck, err := dserv.Add(c)
	if err != nil {
		t.Fatal(err)
	}

	// Create new node b, to be parent to a and c
	b, _ := randNode()
	err = b.AddNodeLink("child", a)
	if err != nil {
		t.Fatal(err)
	}

	err = b.AddNodeLink("otherchild", c)
	if err != nil {
		t.Fatal(err)
	}

	_, err = dserv.Add(b)
	if err != nil {
		t.Fatal(err)
	}

	// recursively pin B{A,C}
	err = p.Pin(ctx, b, true)
	if err != nil {
		t.Fatal(err)
	}

	assertPinned(t, p, ck, "child of recursively pinned node not found")

	bk := b.Cid()
	assertPinned(t, p, bk, "Recursively pinned node not found..")

	d, _ := randNode()
	d.AddNodeLink("a", a)
	d.AddNodeLink("c", c)

	e, _ := randNode()
	d.AddNodeLink("e", e)

	// Must be in dagserv for unpin to work
	_, err = dserv.Add(e)
	if err != nil {
		t.Fatal(err)
	}
	_, err = dserv.Add(d)
	if err != nil {
		t.Fatal(err)
	}

	// Add D{A,C,E}
	err = p.Pin(ctx, d, true)
	if err != nil {
		t.Fatal(err)
	}

	dk := d.Cid()
	assertPinned(t, p, dk, "pinned node not found.")

	// Test recursive unpin
	err = p.Unpin(ctx, dk, true)
	if err != nil {
		t.Fatal(err)
	}

	err = p.Flush()
	if err != nil {
		t.Fatal(err)
	}

	np, err := LoadPinner(dstore, dserv, dserv)
	if err != nil {
		t.Fatal(err)
	}

	// Test directly pinned
	assertPinned(t, np, ak, "Could not find pinned node!")

	// Test recursively pinned
	assertPinned(t, np, bk, "could not find recursively pinned node")
}
Exemple #28
0
func bstore() blockstore.Blockstore {
	return blockstore.NewBlockstore(ds_sync.MutexWrap(ds.NewMapDatastore()))
}