Gegin work on shared store for handlers

2026-05-21 07:14:48 -07:00 · 2021-11-19 19:25:44 +03:00
parent af1cbc543c
commit 566d99fcd7
28 changed files with 271 additions and 294 deletions
--- a/bittorrent/bittorrent.go
+++ b/bittorrent/bittorrent.go
@@ -12,20 +12,23 @@ import (
 	"github.com/chihaya/chihaya/pkg/log"
 )

-// PeerID represents a peer ID.
-type PeerID [20]byte
+const PeerIDLen = 20

-// PeerIDFromBytes creates a PeerID from a byte slice.
+// PeerID represents a peer ID.
+type PeerID [PeerIDLen]byte
+
+var InvalidPeerIDSizeError = errors.New("peer ID must be 20 bytes")
+
+// NewPeerID creates a PeerID from a byte slice.
 //
 // It panics if b is not 20 bytes long.
-func PeerIDFromBytes(b []byte) PeerID {
-	if len(b) != 20 {
-		panic("peer ID must be 20 bytes")
+func NewPeerID(b []byte) (PeerID, error) {
+	var p PeerID
+	if len(b) != PeerIDLen {
+		return p, InvalidPeerIDSizeError
 	}
-
-	var buf [20]byte
-	copy(buf[:], b)
-	return buf
+	copy(p[:], b)
+	return p, nil
 }

 // String implements fmt.Stringer, returning the base16 encoded PeerID.
@@ -38,36 +41,22 @@ func (p PeerID) RawString() string {
 	return string(p[:])
 }

-// PeerIDFromString creates a PeerID from a string.
-//
-// It panics if s is not 20 bytes long.
-func PeerIDFromString(s string) PeerID {
-	if len(s) != 20 {
-		panic("peer ID must be 20 bytes")
-	}
-
-	var buf [20]byte
-	copy(buf[:], s)
-	return buf
-}
-
 // InfoHash represents an infohash.
-type InfoHash []byte
+type InfoHash string

-const(
+const (
 	InfoHashV1Len          = 20
 	InfoHashV2Len          = 32
+	NoneInfoHash  InfoHash = ""
 )

-var invalidHashSize = errors.New("InfoHash must be either 20 (for torrent V1) or 32 (V2) bytes")
+var InvalidHashSizeError = errors.New("info hash must be either 20 (for torrent V1) or 32 (V2) bytes")

-// BytesV1 returns 20-bytes length array of the corresponding InfoHash.
+// TruncateV1 returns truncated to 20-bytes length array of the corresponding InfoHash.
 // If InfoHash is V2 (32 bytes), it will be truncated to 20 bytes
 // according to BEP52.
-func (i InfoHash) BytesV1() [InfoHashV1Len]byte{
-	var bb [InfoHashV1Len]byte
-	copy(bb[:], i)
-	return bb
+func (i InfoHash) TruncateV1() InfoHash {
+	return i[:InfoHashV1Len]
 }

 // ValidateInfoHash validates input bytes size and returns it
@@ -76,27 +65,21 @@ func (i InfoHash) BytesV1() [InfoHashV1Len]byte{
 func ValidateInfoHash(b []byte) (int, error) {
 	l := len(b)
 	if l != InfoHashV1Len && l != InfoHashV2Len {
-		return 0, invalidHashSize
+		return 0, InvalidHashSizeError
 	}
 	return l, nil
 }

-// InfoHashFromBytes creates an InfoHash from a byte slice.
-func InfoHashFromBytes(b []byte) (InfoHash, error) {
-	if l, err := ValidateInfoHash(b); err != nil{
-		return nil, err
+// NewInfoHash creates an InfoHash from a byte slice.
+func NewInfoHash(b []byte) (InfoHash, error) {
+	if _, err := ValidateInfoHash(b); err != nil {
+		return NoneInfoHash, err
 	} else {
-		buf := make([]byte, l)
-		copy(buf[:], b)
+		buf := InfoHash(b)
 		return buf, nil
 	}
 }

-// InfoHashFromString creates an InfoHash from a string.
-func InfoHashFromString(s string) (InfoHash, error) {
-	return InfoHashFromBytes([]byte(s))
-}
-
 // String implements fmt.Stringer, returning the base16 encoded InfoHash.
 func (i InfoHash) String() string {
 	return fmt.Sprintf("%x", i[:])
--- a/bittorrent/bittorrent_test.go
+++ b/bittorrent/bittorrent_test.go
@@ -19,7 +19,7 @@ var peerStringTestCases = []struct {
 }{
 	{
 		input: Peer{
-			ID:   PeerIDFromBytes(b),
+			ID:   NewPeerID(b),
 			IP:   IP{net.IPv4(10, 11, 12, 1), IPv4},
 			Port: 1234,
 		},
@@ -27,7 +27,7 @@ var peerStringTestCases = []struct {
 	},
 	{
 		input: Peer{
-			ID:   PeerIDFromBytes(b),
+			ID:   NewPeerID(b),
 			IP:   IP{net.ParseIP("2001:db8::ff00:42:8329"), IPv6},
 			Port: 1234,
 		},
@@ -36,12 +36,12 @@ var peerStringTestCases = []struct {
 }

 func TestPeerID_String(t *testing.T) {
-	s := PeerIDFromBytes(b).String()
+	s := NewPeerID(b).String()
 	require.Equal(t, expected, s)
 }

 func TestInfoHash_String(t *testing.T) {
-	ih, err := InfoHashFromBytes(b)
+	ih, err := NewInfoHash(b)
 	require.Nil(t, err)
 	require.Equal(t, expected, ih.String())
 }
--- a/cmd/chihaya/e2e.go
+++ b/cmd/chihaya/e2e.go
@@ -57,17 +57,17 @@ func EndToEndRunCmdFunc(cmd *cobra.Command, args []string) error {
 func generateInfohash() bittorrent.InfoHash {
 	b := make([]byte, 20)
 	rand.Read(b)
-	ih, _ := bittorrent.InfoHashFromBytes(b)
+	ih, _ := bittorrent.NewInfoHash(b)
 	return ih
 }

 func test(addr string, delay time.Duration) error {
-	ih, _ := generateInfohash().BytesV1()
+	ih := generateInfohash().TruncateV1()
 	return testWithInfohash(ih, addr, delay)
 }

-func testWithInfohash(infoHash [20]byte, url string, delay time.Duration) error {
-	var ih [20]byte
+func testWithInfohash(infoHash bittorrent.InfoHash, url string, delay time.Duration) error {
+	var ih [bittorrent.InfoHashV1Len]byte
 	req := tracker.AnnounceRequest{
 		InfoHash:   ih,
 		PeerId:     [20]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20},
@@ -95,8 +95,9 @@ func testWithInfohash(infoHash [20]byte, url string, delay time.Duration) error

 	time.Sleep(delay)

+	copy(ih[:], infoHash)
 	req = tracker.AnnounceRequest{
-		InfoHash:   infoHash,
+		InfoHash:   ih,
 		PeerId:     [20]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21},
 		Downloaded: 50,
 		Left:       100,
--- a/cmd/chihaya/main.go
+++ b/cmd/chihaya/main.go
@@ -24,7 +24,7 @@ import (
 // Run represents the state of a running instance of Chihaya.
 type Run struct {
 	configFilePath string
-	peerStore      storage.PeerStore
+	storage        storage.Storage
 	logic          *middleware.Logic
 	sg             *stop.Group
 }
@@ -41,7 +41,7 @@ func NewRun(configFilePath string) (*Run, error) {
 // Start begins an instance of Chihaya.
 // It is optional to provide an instance of the peer store to avoid the
 // creation of a new one.
-func (r *Run) Start(ps storage.PeerStore) error {
+func (r *Run) Start(ps storage.Storage) error {
 	configFile, err := ParseConfigFile(r.configFilePath)
 	if err != nil {
 		return errors.New("failed to read config: " + err.Error())
@@ -59,19 +59,19 @@ func (r *Run) Start(ps storage.PeerStore) error {

 	if ps == nil {
 		log.Info("starting storage", log.Fields{"name": cfg.Storage.Name})
-		ps, err = storage.NewPeerStore(cfg.Storage.Name, cfg.Storage.Config)
+		ps, err = storage.NewStorage(cfg.Storage.Name, cfg.Storage.Config)
 		if err != nil {
 			return errors.New("failed to create storage: " + err.Error())
 		}
 		log.Info("started storage", ps)
 	}
-	r.peerStore = ps
+	r.storage = ps

-	preHooks, err := middleware.HooksFromHookConfigs(cfg.PreHooks)
+	preHooks, err := middleware.HooksFromHookConfigs(cfg.PreHooks, r.storage)
 	if err != nil {
 		return errors.New("failed to validate hook config: " + err.Error())
 	}
-	postHooks, err := middleware.HooksFromHookConfigs(cfg.PostHooks)
+	postHooks, err := middleware.HooksFromHookConfigs(cfg.PostHooks, r.storage)
 	if err != nil {
 		return errors.New("failed to validate hook config: " + err.Error())
 	}
@@ -80,7 +80,7 @@ func (r *Run) Start(ps storage.PeerStore) error {
 		"prehooks":  cfg.PreHookNames(),
 		"posthooks": cfg.PostHookNames(),
 	})
-	r.logic = middleware.NewLogic(cfg.ResponseConfig, r.peerStore, preHooks, postHooks)
+	r.logic = middleware.NewLogic(cfg.ResponseConfig, r.storage, preHooks, postHooks)

 	if cfg.HTTPConfig.Addr != "" {
 		log.Info("starting HTTP frontend", cfg.HTTPConfig)
@@ -113,7 +113,7 @@ func combineErrors(prefix string, errs []error) error {
 }

 // Stop shuts down an instance of Chihaya.
-func (r *Run) Stop(keepPeerStore bool) (storage.PeerStore, error) {
+func (r *Run) Stop(keepPeerStore bool) (storage.Storage, error) {
 	log.Debug("stopping frontends and metrics server")
 	if errs := r.sg.Stop().Wait(); len(errs) != 0 {
 		return nil, combineErrors("failed while shutting down frontends", errs)
@@ -126,13 +126,13 @@ func (r *Run) Stop(keepPeerStore bool) (storage.PeerStore, error) {

 	if !keepPeerStore {
 		log.Debug("stopping peer store")
-		if errs := r.peerStore.Stop().Wait(); len(errs) != 0 {
+		if errs := r.storage.Stop().Wait(); len(errs) != 0 {
 			return nil, combineErrors("failed while shutting down peer store", errs)
 		}
-		r.peerStore = nil
+		r.storage = nil
 	}

-	return r.peerStore, nil
+	return r.storage, nil
 }

 // RootRunCmdFunc implements a Cobra command that runs an instance of Chihaya
--- a/frontend/http/parser.go
+++ b/frontend/http/parser.go
@@ -67,10 +67,10 @@ func ParseAnnounce(r *http.Request, opts ParseOptions) (*bittorrent.AnnounceRequ
 	if !ok {
 		return nil, bittorrent.ClientError("failed to parse parameter: peer_id")
 	}
-	if len(peerID) != 20 {
+	if len(peerID) != bittorrent.PeerIDLen {
 		return nil, bittorrent.ClientError("failed to provide valid peer_id")
 	}
-	request.Peer.ID = bittorrent.PeerIDFromString(peerID)
+	request.Peer.ID = bittorrent.NewPeerID([]byte(peerID))

 	// Determine the number of remaining bytes for the client.
 	request.Left, err = qp.Uint64("left")
--- a/frontend/udp/frontend_test.go
+++ b/frontend/udp/frontend_test.go
@@ -10,7 +10,7 @@ import (
 )

 func TestStartStopRaceIssue437(t *testing.T) {
-	ps, err := storage.NewPeerStore("memory", nil)
+	ps, err := storage.NewStorage("memory", nil)
 	if err != nil {
 		t.Fatal(err)
 	}
--- a/frontend/udp/parser.go
+++ b/frontend/udp/parser.go
@@ -112,7 +112,7 @@ func ParseAnnounce(r Request, v6Action bool, opts ParseOptions) (*bittorrent.Ann
 		return nil, err
 	}

-	ih, err := bittorrent.InfoHashFromBytes(infohash)
+	ih, err := bittorrent.NewInfoHash(infohash)
 	if err != nil{
 		return nil, err
 	}
@@ -128,7 +128,7 @@ func ParseAnnounce(r Request, v6Action bool, opts ParseOptions) (*bittorrent.Ann
 		NumWantProvided: true,
 		EventProvided:   true,
 		Peer: bittorrent.Peer{
-			ID:   bittorrent.PeerIDFromBytes(peerID),
+			ID:   bittorrent.NewPeerID(peerID),
 			IP:   bittorrent.IP{IP: ip},
 			Port: port,
 		},
@@ -227,7 +227,7 @@ func ParseScrape(r Request, opts ParseOptions) (*bittorrent.ScrapeRequest, error
 		pageSize = bittorrent.InfoHashV2Len
 	}
 	for len(r.Packet) >= pageSize {
-		if ih, err := bittorrent.InfoHashFromBytes(r.Packet[:pageSize]); err != nil{
+		if ih, err := bittorrent.NewInfoHash(r.Packet[:pageSize]); err != nil{
 			return nil, err
 		} else {
 			infohashes = append(infohashes, ih)
--- a/middleware/clientapproval/client_id_test.go
+++ b/middleware/clientapproval/client_id_test.go
@@ -47,7 +47,7 @@ func TestClientID(t *testing.T) {
 		t.Run(tt.peerID, func(t *testing.T) {
 			var clientID ClientID
 			copy(clientID[:], tt.clientID)
-			parsedID := NewClientID(bittorrent.PeerIDFromString(tt.peerID))
+			parsedID := NewClientID(bittorrent.NewPeerID([]byte(tt.peerID)))
 			if parsedID != clientID {
 				t.Error("Incorrectly parsed peer ID", tt.peerID, "as", parsedID)
 			}
--- a/middleware/clientapproval/clientapproval.go
+++ b/middleware/clientapproval/clientapproval.go
@@ -6,6 +6,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/chihaya/chihaya/storage"
 	"gopkg.in/yaml.v2"

 	"github.com/chihaya/chihaya/bittorrent"
@@ -23,7 +24,7 @@ var _ middleware.Driver = driver{}

 type driver struct{}

-func (d driver) NewHook(optionBytes []byte) (middleware.Hook, error) {
+func (d driver) NewHook(optionBytes []byte, _ storage.Storage) (middleware.Hook, error) {
 	var cfg Config
 	err := yaml.Unmarshal(optionBytes, &cfg)
 	if err != nil {
@@ -100,7 +101,7 @@ func (h *hook) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceReque
 	return ctx, nil
 }

-func (h *hook) HandleScrape(ctx context.Context, req *bittorrent.ScrapeRequest, resp *bittorrent.ScrapeResponse) (context.Context, error) {
+func (h *hook) HandleScrape(ctx context.Context, _ *bittorrent.ScrapeRequest, _ *bittorrent.ScrapeResponse) (context.Context, error) {
 	// Scrapes don't require any protection.
 	return ctx, nil
 }
--- a/middleware/clientapproval/clientapproval_test.go
+++ b/middleware/clientapproval/clientapproval_test.go
@@ -59,7 +59,7 @@ func TestHandleAnnounce(t *testing.T) {
 			req := &bittorrent.AnnounceRequest{}
 			resp := &bittorrent.AnnounceResponse{}

-			peerid := bittorrent.PeerIDFromString(tt.peerID)
+			peerid := bittorrent.NewPeerID([]byte(tt.peerID))

 			req.Peer.ID = peerid

--- a/middleware/hooks.go
+++ b/middleware/hooks.go
@@ -25,7 +25,7 @@ type skipSwarmInteraction struct{}
 var SkipSwarmInteractionKey = skipSwarmInteraction{}

 type swarmInteractionHook struct {
-	store storage.PeerStore
+	store storage.Storage
 }

 func (h *swarmInteractionHook) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceRequest, resp *bittorrent.AnnounceResponse) (_ context.Context, err error) {
@@ -85,7 +85,7 @@ type scrapeAddressType struct{}
 var ScrapeIsIPv6Key = scrapeAddressType{}

 type responseHook struct {
-	store storage.PeerStore
+	store storage.Storage
 }

 func (h *responseHook) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceRequest, resp *bittorrent.AnnounceResponse) (_ context.Context, err error) {
--- a/middleware/jwt/jwt.go
+++ b/middleware/jwt/jwt.go
@@ -13,6 +13,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/chihaya/chihaya/storage"
 	"net/http"
 	"strings"
 	"time"
@@ -40,7 +41,7 @@ var _ middleware.Driver = driver{}

 type driver struct{}

-func (d driver) NewHook(optionBytes []byte) (middleware.Hook, error) {
+func (d driver) NewHook(optionBytes []byte, _ storage.Storage) (middleware.Hook, error) {
 	var cfg Config
 	err := yaml.Unmarshal(optionBytes, &cfg)
 	if err != nil {
@@ -174,7 +175,7 @@ func (h *hook) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceReque
 	return ctx, nil
 }

-func (h *hook) HandleScrape(ctx context.Context, req *bittorrent.ScrapeRequest, resp *bittorrent.ScrapeResponse) (context.Context, error) {
+func (h *hook) HandleScrape(ctx context.Context, _ *bittorrent.ScrapeRequest, _ *bittorrent.ScrapeResponse) (context.Context, error) {
 	// Scrapes don't require any protection.
 	return ctx, nil
 }
@@ -204,7 +205,7 @@ func validateJWT(ih bittorrent.InfoHash, jwtBytes []byte, cfgIss, cfgAud string,
 		return jwt.ErrInvalidAUDClaim
 	}

-	ihHex := hex.EncodeToString(ih[:])
+	ihHex := hex.EncodeToString([]byte(ih))
 	if ihClaim, ok := claims.Get("infohash").(string); !ok || ihClaim != ihHex {
 		log.Debug("unequal or missing infohash when validating JWT", log.Fields{
 			"exists":  ok,
--- a/middleware/logic.go
+++ b/middleware/logic.go
@@ -26,11 +26,10 @@ var _ frontend.TrackerLogic = &Logic{}

 // NewLogic creates a new instance of a TrackerLogic that executes the provided
 // middleware hooks.
-func NewLogic(cfg ResponseConfig, peerStore storage.PeerStore, preHooks, postHooks []Hook) *Logic {
+func NewLogic(cfg ResponseConfig, peerStore storage.Storage, preHooks, postHooks []Hook) *Logic {
 	return &Logic{
 		announceInterval:    cfg.AnnounceInterval,
 		minAnnounceInterval: cfg.MinAnnounceInterval,
-		peerStore:           peerStore,
 		preHooks:            append(preHooks, &responseHook{store: peerStore}),
 		postHooks:           append(postHooks, &swarmInteractionHook{store: peerStore}),
 	}
@@ -41,7 +40,6 @@ func NewLogic(cfg ResponseConfig, peerStore storage.PeerStore, preHooks, postHoo
 type Logic struct {
 	announceInterval    time.Duration
 	minAnnounceInterval time.Duration
-	peerStore           storage.PeerStore
 	preHooks            []Hook
 	postHooks           []Hook
 }
--- a/middleware/middleware.go
+++ b/middleware/middleware.go
@@ -4,6 +4,7 @@ package middleware

 import (
 	"errors"
+	"github.com/chihaya/chihaya/storage"
 	"sync"

 	yaml "gopkg.in/yaml.v2"
@@ -23,7 +24,7 @@ var (
 // The options parameter is YAML encoded bytes that should be unmarshalled into
 // the hook's custom configuration.
 type Driver interface {
-	NewHook(options []byte) (Hook, error)
+	NewHook(options []byte, storage storage.Storage) (Hook, error)
 }

 // RegisterDriver makes a Driver available by the provided name.
@@ -52,7 +53,7 @@ func RegisterDriver(name string, d Driver) {
 // list of registered Drivers.
 //
 // If a driver does not exist, returns ErrDriverDoesNotExist.
-func New(name string, optionBytes []byte) (Hook, error) {
+func New(name string, optionBytes []byte, storage storage.Storage) (Hook, error) {
 	driversM.RLock()
 	defer driversM.RUnlock()

@@ -62,7 +63,7 @@ func New(name string, optionBytes []byte) (Hook, error) {
 		return nil, ErrDriverDoesNotExist
 	}

-	return d.NewHook(optionBytes)
+	return d.NewHook(optionBytes, storage)
 }

 // Config is the generic configuration format used for all registered Hooks.
@@ -72,7 +73,7 @@ type Config struct {
 }

 // HooksFromHookConfigs is a utility function for initializing Hooks in bulk.
-func HooksFromHookConfigs(cfgs []Config) (hooks []Hook, err error) {
+func HooksFromHookConfigs(cfgs []Config, storage storage.Storage) (hooks []Hook, err error) {
 	for _, cfg := range cfgs {
 		// Marshal the options back into bytes.
 		var optionBytes []byte
@@ -82,7 +83,7 @@ func HooksFromHookConfigs(cfgs []Config) (hooks []Hook, err error) {
 		}

 		var h Hook
-		h, err = New(cfg.Name, optionBytes)
+		h, err = New(cfg.Name, optionBytes, storage)
 		if err != nil {
 			return
 		}
--- a/middleware/pkg/random/entropy.go
+++ b/middleware/pkg/random/entropy.go
@@ -11,7 +11,7 @@ import (
 //
 // Calling DeriveEntropyFromRequest multiple times yields the same values.
 func DeriveEntropyFromRequest(req *bittorrent.AnnounceRequest) (uint64, uint64) {
-	v0 := binary.BigEndian.Uint64(req.InfoHash[:8]) + binary.BigEndian.Uint64(req.InfoHash[8:16])
+	v0 := binary.BigEndian.Uint64([]byte(req.InfoHash[:8])) + binary.BigEndian.Uint64([]byte(req.InfoHash[8:16]))
 	v1 := binary.BigEndian.Uint64(req.Peer.ID[:8]) + binary.BigEndian.Uint64(req.Peer.ID[8:16])
 	return v0, v1
 }
--- a/middleware/torrentapproval/container/container.go
+++ b/middleware/torrentapproval/container/container.go
@@ -3,10 +3,11 @@ package container
 import (
 	"errors"
 	"github.com/chihaya/chihaya/bittorrent"
+	"github.com/chihaya/chihaya/storage"
 	"sync"
 )

-type Builder func ([]byte) (Container, error)
+type Builder func ([]byte, storage.Storage) (Container, error)

 var (
 	buildersMU sync.Mutex
@@ -32,7 +33,7 @@ type Container interface {
 	Contains(bittorrent.InfoHash) bool
 }

-func GetContainer(name string, confBytes []byte) (Container, error) {
+func GetContainer(name string, confBytes []byte, storage storage.Storage) (Container, error) {

 	buildersMU.Lock()
 	defer buildersMU.Unlock()
@@ -41,7 +42,7 @@ func GetContainer(name string, confBytes []byte) (Container, error) {
 	if builder, exist := builders[name]; !exist {
 		err = ErrContainerDoesNotExist
 	} else {
-		cn, err = builder(confBytes)
+		cn, err = builder(confBytes, storage)
 	}
 	return cn, err
 }
--- a/middleware/torrentapproval/container/directory/directory.go
+++ b/middleware/torrentapproval/container/directory/directory.go
@@ -9,6 +9,7 @@ import (
 	"github.com/chihaya/chihaya/middleware/torrentapproval/container"
 	"github.com/chihaya/chihaya/middleware/torrentapproval/container/list"
 	"github.com/chihaya/chihaya/pkg/stop"
+	"github.com/chihaya/chihaya/storage"
 	"gopkg.in/yaml.v2"
 	"sync"
 )
@@ -22,7 +23,8 @@ type Config struct {
 	BlacklistPath string `yaml:"blacklist_path"`
 }

-func build(confBytes []byte) (container.Container, error) {
+// TODO: change sync map to provided storage
+func build(confBytes []byte, storage storage.Storage) (container.Container, error) {
 	c := new(Config)
 	if err := yaml.Unmarshal(confBytes, c); err != nil {
 		return nil, fmt.Errorf("unable to deserialise configuration: %v", err)
@@ -42,6 +44,7 @@ func build(confBytes []byte) (container.Container, error) {
 	if lst.Invert {
 		dir = c.BlacklistPath
 	}
+	//FIXME: implement V2 torrent add/delete
 	var w *dirwatch.Instance
 	if w, err = dirwatch.New(dir); err != nil {
 		return nil, fmt.Errorf("unable to initialize directory watch: %v", err)
--- a/middleware/torrentapproval/container/list/list.go
+++ b/middleware/torrentapproval/container/list/list.go
@@ -5,8 +5,9 @@ package list
 import (
 	"encoding/hex"
 	"fmt"
-	"github.com/chihaya/chihaya/bittorrent"
+	bittorrent "github.com/chihaya/chihaya/bittorrent"
 	"github.com/chihaya/chihaya/middleware/torrentapproval/container"
+	"github.com/chihaya/chihaya/storage"
 	"gopkg.in/yaml.v2"
 	"sync"
 )
@@ -22,7 +23,8 @@ type Config struct {

 var DUMMY struct{}

-func build(confBytes []byte) (container.Container, error) {
+// TODO: change sync map to provided storage
+func build(confBytes []byte, storage storage.Storage) (container.Container, error) {
 	c := new(Config)
 	if err := yaml.Unmarshal(confBytes, c); err != nil {
 		return nil, fmt.Errorf("unable to deserialise configuration: %v", err)
@@ -41,14 +43,15 @@ func build(confBytes []byte) (container.Container, error) {
 	}

 	for _, hashString := range hashList {
-		hashinfo, err := hex.DecodeString(hashString)
+		hashBytes, err := hex.DecodeString(hashString)
 		if err != nil {
 			return nil, fmt.Errorf("whitelist : invalid hash %s, %v", hashString, err)
 		}
-		if len(hashinfo) != 20 {
-			return nil, fmt.Errorf("whitelist : hash %s is not 20 byes", hashString)
+		ih, err := bittorrent.NewInfoHash(hashBytes)
+		if err != nil {
+			return nil, fmt.Errorf("whitelist : %s : %v", hashString, err)
 		}
-		l.Hashes.Store(bittorrent.InfoHashFromBytes(hashinfo), DUMMY)
+		l.Hashes.Store(ih, DUMMY)
 	}
 	return l, nil
 }
--- a/middleware/torrentapproval/torrentapproval.go
+++ b/middleware/torrentapproval/torrentapproval.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"github.com/chihaya/chihaya/middleware/torrentapproval/container"
 	"github.com/chihaya/chihaya/pkg/stop"
+	"github.com/chihaya/chihaya/storage"
 	"gopkg.in/yaml.v2"

 	"github.com/chihaya/chihaya/bittorrent"
@@ -24,7 +25,7 @@ func init() {

 type driver struct{}

-func (d driver) NewHook(optionBytes []byte) (middleware.Hook, error) {
+func (d driver) NewHook(optionBytes []byte, storage storage.Storage) (middleware.Hook, error) {
 	var cfg middleware.Config
 	err := yaml.Unmarshal(optionBytes, &cfg)
 	if err != nil {
@@ -44,7 +45,7 @@ func (d driver) NewHook(optionBytes []byte) (middleware.Hook, error) {
 		return nil, err
 	}

-	if c, err := container.GetContainer(cfg.Name, confBytes); err == nil {
+	if c, err := container.GetContainer(cfg.Name, confBytes, storage); err == nil {
 		return &hook{c}, nil
 	} else {
 		return nil, err
--- a/middleware/torrentapproval/torrentapproval_test.go
+++ b/middleware/torrentapproval/torrentapproval_test.go
@@ -80,7 +80,7 @@ func TestHandleAnnounce(t *testing.T) {
 			hashbytes, err := hex.DecodeString(tt.ih)
 			require.Nil(t, err)

-			hashinfo := bittorrent.InfoHashFromBytes(hashbytes)
+			hashinfo := bittorrent.NewInfoHash(hashbytes)

 			req.InfoHash = hashinfo

--- a/middleware/varinterval/varinterval.go
+++ b/middleware/varinterval/varinterval.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/chihaya/chihaya/storage"
 	"sync"
 	"time"

@@ -25,7 +26,7 @@ var _ middleware.Driver = driver{}

 type driver struct{}

-func (d driver) NewHook(optionBytes []byte) (middleware.Hook, error) {
+func (d driver) NewHook(optionBytes []byte, _ storage.Storage) (middleware.Hook, error) {
 	var cfg Config
 	err := yaml.Unmarshal(optionBytes, &cfg)
 	if err != nil {
@@ -96,12 +97,12 @@ func (h *hook) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceReque
 	if h.cfg.ModifyResponseProbability == 1 || p < h.cfg.ModifyResponseProbability {
 		// Generate the increase delta.
 		v, _, _ = random.Intn(s0, s1, h.cfg.MaxIncreaseDelta)
-		addSeconds := time.Duration(v+1) * time.Second
+		add := time.Duration(v+1) * time.Second

-		resp.Interval += addSeconds
+		resp.Interval += add

 		if h.cfg.ModifyMinInterval {
-			resp.MinInterval += addSeconds
+			resp.MinInterval += add
 		}

 		return ctx, nil
--- a/storage/memory/peer_store.go
+++ b/storage/memory/peer_store.go
@@ -11,7 +11,7 @@ import (

 	yaml "gopkg.in/yaml.v2"

-	"github.com/chihaya/chihaya/bittorrent"
+	bittorrent "github.com/chihaya/chihaya/bittorrent"
 	"github.com/chihaya/chihaya/pkg/log"
 	"github.com/chihaya/chihaya/pkg/stop"
 	"github.com/chihaya/chihaya/pkg/timecache"
@@ -36,7 +36,7 @@ func init() {

 type driver struct{}

-func (d driver) NewPeerStore(icfg interface{}) (storage.PeerStore, error) {
+func (d driver) NewPeerStore(icfg interface{}) (storage.Storage, error) {
 	// Marshal the config back into bytes.
 	bytes, err := yaml.Marshal(icfg)
 	if err != nil {
@@ -53,7 +53,7 @@ func (d driver) NewPeerStore(icfg interface{}) (storage.PeerStore, error) {
 	return New(cfg)
 }

-// Config holds the configuration of a memory PeerStore.
+// Config holds the configuration of a memory Storage.
 type Config struct {
 	GarbageCollectionInterval   time.Duration `yaml:"gc_interval"`
 	PrometheusReportingInterval time.Duration `yaml:"prometheus_reporting_interval"`
@@ -118,8 +118,8 @@ func (cfg Config) Validate() Config {
 	return validcfg
 }

-// New creates a new PeerStore backed by memory.
-func New(provided Config) (storage.PeerStore, error) {
+// New creates a new Storage backed by memory.
+func New(provided Config) (storage.Storage, error) {
 	cfg := provided.Validate()
 	ps := &peerStore{
 		cfg:    cfg,
@@ -142,7 +142,9 @@ func New(provided Config) (storage.PeerStore, error) {
 			case <-time.After(cfg.GarbageCollectionInterval):
 				before := time.Now().Add(-cfg.PeerLifetime)
 				log.Debug("storage: purging peers with no announces since", log.Fields{"before": before})
-				ps.collectGarbage(before)
+				if err := ps.collectGarbage(before); err != nil {
+					log.Error(err)
+				}
 			}
 		}
 	}()
@@ -177,17 +179,22 @@ type serializedPeer string
 func newPeerKey(p bittorrent.Peer) serializedPeer {
 	b := make([]byte, 20+2+len(p.IP.IP))
 	copy(b[:20], p.ID[:])
-	binary.BigEndian.PutUint16(b[20:22], p.Port)
-	copy(b[22:], p.IP.IP)
+	binary.BigEndian.PutUint16(b[bittorrent.PeerIDLen:bittorrent.PeerIDLen+2], p.Port)
+	copy(b[bittorrent.PeerIDLen+2:], p.IP.IP)

 	return serializedPeer(b)
 }

+// TODO: move duplicated code into one place
 func decodePeerKey(pk serializedPeer) bittorrent.Peer {
+	peerId, err := bittorrent.NewPeerID([]byte(pk[:bittorrent.PeerIDLen]))
+	if err != nil {
+		panic(err)
+	}
 	peer := bittorrent.Peer{
-		ID:   bittorrent.PeerIDFromString(string(pk[:20])),
-		Port: binary.BigEndian.Uint16([]byte(pk[20:22])),
-		IP:   bittorrent.IP{IP: net.IP(pk[22:])}}
+		ID:   peerId,
+		Port: binary.BigEndian.Uint16([]byte(pk[bittorrent.PeerIDLen:bittorrent.PeerIDLen+2])),
+		IP:   bittorrent.IP{IP: net.IP(pk[bittorrent.PeerIDLen+2:])}}

 	if ip := peer.IP.To4(); ip != nil {
 		peer.IP.IP = ip
@@ -222,7 +229,7 @@ type peerStore struct {
 	wg     sync.WaitGroup
 }

-var _ storage.PeerStore = &peerStore{}
+var _ storage.Storage = &peerStore{}

 // populateProm aggregates metrics over all shards and then posts them to
 // prometheus.
@@ -255,7 +262,7 @@ func (ps *peerStore) shardIndex(infoHash bittorrent.InfoHash, af bittorrent.Addr
 	// There are twice the amount of shards specified by the user, the first
 	// half is dedicated to IPv4 swarms and the second half is dedicated to
 	// IPv6 swarms.
-	idx := binary.BigEndian.Uint32(infoHash[:4]) % (uint32(len(ps.shards)) / 2)
+	idx := binary.BigEndian.Uint32([]byte(infoHash[:4])) % (uint32(len(ps.shards)) / 2)
 	if af == bittorrent.IPv6 {
 		idx += uint32(len(ps.shards) / 2)
 	}
@@ -512,7 +519,7 @@ func (ps *peerStore) ScrapeSwarm(ih bittorrent.InfoHash, addressFamily bittorren
 	return
 }

-// collectGarbage deletes all Peers from the PeerStore which are older than the
+// collectGarbage deletes all Peers from the Storage which are older than the
 // cutoff time.
 //
 // This function must be able to execute while other methods on this interface
--- a/storage/memory/peer_store_test.go
+++ b/storage/memory/peer_store_test.go
@@ -7,7 +7,7 @@ import (
 	s "github.com/chihaya/chihaya/storage"
 )

-func createNew() s.PeerStore {
+func createNew() s.Storage {
 	ps, err := New(Config{
 		ShardCount:                  1024,
 		GarbageCollectionInterval:   10 * time.Minute,
--- a/storage/redis/peer_store.go
+++ b/storage/redis/peer_store.go
@@ -61,7 +61,7 @@ func init() {

 type driver struct{}

-func (d driver) NewPeerStore(icfg interface{}) (storage.PeerStore, error) {
+func (d driver) NewPeerStore(icfg interface{}) (storage.Storage, error) {
 	// Marshal the config back into bytes.
 	bytes, err := yaml.Marshal(icfg)
 	if err != nil {
@@ -78,7 +78,7 @@ func (d driver) NewPeerStore(icfg interface{}) (storage.PeerStore, error) {
 	return New(cfg)
 }

-// Config holds the configuration of a redis PeerStore.
+// Config holds the configuration of a redis Storage.
 type Config struct {
 	GarbageCollectionInterval   time.Duration `yaml:"gc_interval"`
 	PrometheusReportingInterval time.Duration `yaml:"prometheus_reporting_interval"`
@@ -176,8 +176,8 @@ func (cfg Config) Validate() Config {
 	return validcfg
 }

-// New creates a new PeerStore backed by redis.
-func New(provided Config) (storage.PeerStore, error) {
+// New creates a new Storage backed by redis.
+func New(provided Config) (storage.Storage, error) {
 	cfg := provided.Validate()

 	u, err := parseRedisURL(cfg.RedisBroker)
@@ -237,19 +237,24 @@ func New(provided Config) (storage.PeerStore, error) {
 type serializedPeer string

 func newPeerKey(p bittorrent.Peer) serializedPeer {
-	b := make([]byte, 20+2+len(p.IP.IP))
-	copy(b[:20], p.ID[:])
-	binary.BigEndian.PutUint16(b[20:22], p.Port)
-	copy(b[22:], p.IP.IP)
+	b := make([]byte, bittorrent.PeerIDLen+2+len(p.IP.IP))
+	copy(b[:bittorrent.PeerIDLen], p.ID[:])
+	binary.BigEndian.PutUint16(b[bittorrent.PeerIDLen:bittorrent.PeerIDLen+2], p.Port)
+	copy(b[bittorrent.PeerIDLen+2:], p.IP.IP)

 	return serializedPeer(b)
 }

+// TODO: move duplicated code into one place
 func decodePeerKey(pk serializedPeer) bittorrent.Peer {
+	peerId, err := bittorrent.NewPeerID([]byte(pk[:bittorrent.PeerIDLen]))
+	if err != nil {
+		panic(err)
+	}
 	peer := bittorrent.Peer{
-		ID:   bittorrent.PeerIDFromString(string(pk[:20])),
-		Port: binary.BigEndian.Uint16([]byte(pk[20:22])),
-		IP:   bittorrent.IP{IP: net.IP(pk[22:])}}
+		ID:   peerId,
+		Port: binary.BigEndian.Uint16([]byte(pk[bittorrent.PeerIDLen : bittorrent.PeerIDLen+2])),
+		IP:   bittorrent.IP{IP: net.IP(pk[bittorrent.PeerIDLen+2:])}}

 	if ip := peer.IP.To4(); ip != nil {
 		peer.IP.IP = ip
@@ -295,12 +300,21 @@ func (ps *peerStore) leecherCountKey(af string) string {
 	return af + "_L_count"
 }

+func (ps *peerStore) getConnection() redis.Conn {
+	select {
+	case <-ps.closed:
+		panic("attempted to interact with stopped redis store")
+	default:
+	}
+	return ps.rb.open()
+}
+
 // populateProm aggregates metrics over all groups and then posts them to
 // prometheus.
 func (ps *peerStore) populateProm() {
 	var numInfohashes, numSeeders, numLeechers int64

-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	for _, group := range ps.groups() {
@@ -346,18 +360,11 @@ func (ps *peerStore) PutSeeder(ih bittorrent.InfoHash, p bittorrent.Peer) error
 		"Peer":     p,
 	})

-	select {
-	case <-ps.closed:
-		panic("attempted to interact with stopped redis store")
-	default:
-	}
-
 	pk := newPeerKey(p)
-
 	encodedSeederInfoHash := ps.seederInfohashKey(addressFamily, ih.String())
 	ct := ps.getClock()

-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	conn.Send("MULTI")
@@ -393,15 +400,9 @@ func (ps *peerStore) DeleteSeeder(ih bittorrent.InfoHash, p bittorrent.Peer) err
 		"Peer":     p,
 	})

-	select {
-	case <-ps.closed:
-		panic("attempted to interact with stopped redis store")
-	default:
-	}
-
 	pk := newPeerKey(p)

-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	encodedSeederInfoHash := ps.seederInfohashKey(addressFamily, ih.String())
@@ -427,18 +428,12 @@ func (ps *peerStore) PutLeecher(ih bittorrent.InfoHash, p bittorrent.Peer) error
 		"Peer":     p,
 	})

-	select {
-	case <-ps.closed:
-		panic("attempted to interact with stopped redis store")
-	default:
-	}
-
 	// Update the peer in the swarm.
 	encodedLeecherInfoHash := ps.leecherInfohashKey(addressFamily, ih.String())
 	pk := newPeerKey(p)
 	ct := ps.getClock()

-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	conn.Send("MULTI")
@@ -465,13 +460,7 @@ func (ps *peerStore) DeleteLeecher(ih bittorrent.InfoHash, p bittorrent.Peer) er
 		"Peer":     p,
 	})

-	select {
-	case <-ps.closed:
-		panic("attempted to interact with stopped redis store")
-	default:
-	}
-
-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	pk := newPeerKey(p)
@@ -484,9 +473,7 @@ func (ps *peerStore) DeleteLeecher(ih bittorrent.InfoHash, p bittorrent.Peer) er
 	if delNum == 0 {
 		return storage.ErrResourceDoesNotExist
 	}
-	if _, err := conn.Do("DECR", ps.leecherCountKey(addressFamily)); err != nil {
-		return err
-	}
+	_, err = conn.Do("DECR", ps.leecherCountKey(addressFamily))

 	return nil
 }
@@ -498,19 +485,13 @@ func (ps *peerStore) GraduateLeecher(ih bittorrent.InfoHash, p bittorrent.Peer)
 		"Peer":     p,
 	})

-	select {
-	case <-ps.closed:
-		panic("attempted to interact with stopped redis store")
-	default:
-	}
-
 	encodedInfoHash := ih.String()
 	encodedLeecherInfoHash := ps.leecherInfohashKey(addressFamily, encodedInfoHash)
 	encodedSeederInfoHash := ps.seederInfohashKey(addressFamily, encodedInfoHash)
 	pk := newPeerKey(p)
 	ct := ps.getClock()

-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	conn.Send("MULTI")
@@ -552,17 +533,11 @@ func (ps *peerStore) AnnouncePeers(ih bittorrent.InfoHash, seeder bool, numWant
 		"Peer":     announcer,
 	})

-	select {
-	case <-ps.closed:
-		panic("attempted to interact with stopped redis store")
-	default:
-	}
-
 	encodedInfoHash := ih.String()
 	encodedLeecherInfoHash := ps.leecherInfohashKey(addressFamily, encodedInfoHash)
 	encodedSeederInfoHash := ps.seederInfohashKey(addressFamily, encodedInfoHash)

-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	leechers, err := conn.Do("HKEYS", encodedLeecherInfoHash)
@@ -624,11 +599,6 @@ func (ps *peerStore) AnnouncePeers(ih bittorrent.InfoHash, seeder bool, numWant
 }

 func (ps *peerStore) ScrapeSwarm(ih bittorrent.InfoHash, af bittorrent.AddressFamily) (resp bittorrent.Scrape) {
-	select {
-	case <-ps.closed:
-		panic("attempted to interact with stopped redis store")
-	default:
-	}

 	resp.InfoHash = ih
 	addressFamily := af.String()
@@ -636,7 +606,7 @@ func (ps *peerStore) ScrapeSwarm(ih bittorrent.InfoHash, af bittorrent.AddressFa
 	encodedLeecherInfoHash := ps.leecherInfohashKey(addressFamily, encodedInfoHash)
 	encodedSeederInfoHash := ps.seederInfohashKey(addressFamily, encodedInfoHash)

-	conn := ps.rb.open()
+	conn := ps.getConnection()
 	defer conn.Close()

 	leechersLen, err := redis.Int64(conn.Do("HLEN", encodedLeecherInfoHash))
@@ -663,7 +633,7 @@ func (ps *peerStore) ScrapeSwarm(ih bittorrent.InfoHash, af bittorrent.AddressFa
 	return
 }

-// collectGarbage deletes all Peers from the PeerStore which are older than the
+// collectGarbage deletes all Peers from the Storage which are older than the
 // cutoff time.
 //
 // This function must be able to execute while other methods on this interface
@@ -709,18 +679,12 @@ func (ps *peerStore) ScrapeSwarm(ih bittorrent.InfoHash, af bittorrent.AddressFa
 //	 transaction. The infohash key will remain in the addressFamil hash and
 //	 we'll attempt to clean it up the next time collectGarbage runs.
 func (ps *peerStore) collectGarbage(cutoff time.Time) error {
-	select {
-	case <-ps.closed:
-		return nil
-	default:
-	}
-
-	conn := ps.rb.open()
-	defer conn.Close()
-
 	cutoffUnix := cutoff.UnixNano()
 	start := time.Now()

+	conn := ps.getConnection()
+	defer conn.Close()
+
 	for _, group := range ps.groups() {
 		// list all infohashes in the group
 		infohashesList, err := redis.Strings(conn.Do("HKEYS", group))
--- a/storage/redis/peer_store_test.go
+++ b/storage/redis/peer_store_test.go
@@ -10,7 +10,7 @@ import (
 	s "github.com/chihaya/chihaya/storage"
 )

-func createNew() s.PeerStore {
+func createNew() s.Storage {
 	rs, err := miniredis.Run()
 	if err != nil {
 		panic(err)
--- a/storage/storage.go
+++ b/storage/storage.go
@@ -14,24 +14,24 @@ var (
 	drivers  = make(map[string]Driver)
 )

-// Driver is the interface used to initialize a new type of PeerStore.
+// Driver is the interface used to initialize a new type of Storage.
 type Driver interface {
-	NewPeerStore(cfg interface{}) (PeerStore, error)
+	NewPeerStore(cfg interface{}) (Storage, error)
 }

 // ErrResourceDoesNotExist is the error returned by all delete methods and the
-// AnnouncePeers method of the PeerStore interface if the requested resource
+// AnnouncePeers method of the Storage interface if the requested resource
 // does not exist.
 var ErrResourceDoesNotExist = bittorrent.ClientError("resource does not exist")

-// ErrDriverDoesNotExist is the error returned by NewPeerStore when a peer
+// ErrDriverDoesNotExist is the error returned by NewStorage when a peer
 // store driver with that name does not exist.
 var ErrDriverDoesNotExist = errors.New("peer store driver with that name does not exist")

-// PeerStore is an interface that abstracts the interactions of storing and
+// Storage is an interface that abstracts the interactions of storing and
 // manipulating Peers such that it can be implemented for various data stores.
 //
-// Implementations of the PeerStore interface must do the following in addition
+// Implementations of the Storage interface must do the following in addition
 // to implementing the methods of the interface in the way documented:
 //
 // - Implement a garbage-collection strategy that ensures stale data is removed.
@@ -40,13 +40,13 @@ var ErrDriverDoesNotExist = errors.New("peer store driver with that name does no
 //     be scanned periodically and too old Peers removed. The intervals and
 //     durations involved should be configurable.
 // - IPv4 and IPv6 swarms must be isolated from each other.
-//     A PeerStore must be able to transparently handle IPv4 and IPv6 Peers, but
+//     A Storage must be able to transparently handle IPv4 and IPv6 Peers, but
 //     must separate them. AnnouncePeers and ScrapeSwarm must return information
 //     about the Swarm matching the given AddressFamily only.
 //
 // Implementations can be tested against this interface using the tests in
-// storage_tests.go and the benchmarks in storage_bench.go.
-type PeerStore interface {
+// storage_test.go and the benchmarks in storage_bench.go.
+type Storage interface {
 	// PutSeeder adds a Seeder to the Swarm identified by the provided
 	// InfoHash.
 	PutSeeder(infoHash bittorrent.InfoHash, p bittorrent.Peer) error
@@ -104,13 +104,21 @@ type PeerStore interface {
 	// If the Swarm does not exist, an empty Scrape and no error is returned.
 	ScrapeSwarm(infoHash bittorrent.InfoHash, addressFamily bittorrent.AddressFamily) bittorrent.Scrape

+	/*TODO: implement this*/
+	
+	Put(key interface{}, value interface{})
+
+	Load(key interface{}) interface{}
+
+	Delete(key interface{})
+
 	// stop.Stopper is an interface that expects a Stop method to stop the
-	// PeerStore.
+	// Storage.
 	// For more details see the documentation in the stop package.
 	stop.Stopper

 	// log.Fielder returns a loggable version of the data used to configure and
-	// operate a particular PeerStore.
+	// operate a particular Storage.
 	log.Fielder
 }

@@ -136,11 +144,11 @@ func RegisterDriver(name string, d Driver) {
 	drivers[name] = d
 }

-// NewPeerStore attempts to initialize a new PeerStore instance from
+// NewStorage attempts to initialize a new Storage instance from
 // the list of registered Drivers.
 //
 // If a driver does not exist, returns ErrDriverDoesNotExist.
-func NewPeerStore(name string, cfg interface{}) (ps PeerStore, err error) {
+func NewStorage(name string, cfg interface{}) (ps Storage, err error) {
 	driversM.RLock()
 	defer driversM.RUnlock()

--- a/storage/storage_bench.go
+++ b/storage/storage_bench.go
@@ -19,7 +19,7 @@ func generateInfohashes() (a [1000]bittorrent.InfoHash) {
 	for i := range a {
 		b := make([]byte, 20)
 		rand.Read(b)
-		a[i], _ = bittorrent.InfoHashFromBytes(b)
+		a[i], _ = bittorrent.NewInfoHash(b)
 	}

 	return
@@ -49,10 +49,10 @@ func generatePeers() (a [1000]bittorrent.Peer) {
 	return
 }

-type executionFunc func(int, PeerStore, *benchData) error
-type setupFunc func(PeerStore, *benchData) error
+type executionFunc func(int, Storage, *benchData) error
+type setupFunc func(Storage, *benchData) error

-func runBenchmark(b *testing.B, ps PeerStore, parallel bool, sf setupFunc, ef executionFunc) {
+func runBenchmark(b *testing.B, ps Storage, parallel bool, sf setupFunc, ef executionFunc) {
 	bd := &benchData{generateInfohashes(), generatePeers()}
 	spacing := int32(1000 / runtime.NumCPU())
 	if sf != nil {
@@ -92,65 +92,65 @@ func runBenchmark(b *testing.B, ps PeerStore, parallel bool, sf setupFunc, ef ex
 }

 // Nop executes a no-op for each iteration.
-// It should produce the same results for each PeerStore.
+// It should produce the same results for each Storage.
 // This can be used to get an estimate of the impact of the benchmark harness
 // on benchmark results and an estimate of the general performance of the system
 // benchmarked on.
 //
 // Nop can run in parallel.
-func Nop(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, putPeers, func(i int, ps PeerStore, bd *benchData) error {
+func Nop(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, putPeers, func(i int, ps Storage, bd *benchData) error {
 		return nil
 	})
 }

-// Put benchmarks the PutSeeder method of a PeerStore by repeatedly Putting the
+// Put benchmarks the PutSeeder method of a Storage by repeatedly Putting the
 // same Peer for the same InfoHash.
 //
 // Put can run in parallel.
-func Put(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func Put(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		return ps.PutSeeder(bd.infohashes[0], bd.peers[0])
 	})
 }

-// Put1k benchmarks the PutSeeder method of a PeerStore by cycling through 1000
+// Put1k benchmarks the PutSeeder method of a Storage by cycling through 1000
 // Peers and Putting them into the swarm of one infohash.
 //
 // Put1k can run in parallel.
-func Put1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func Put1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		return ps.PutSeeder(bd.infohashes[0], bd.peers[i%1000])
 	})
 }

-// Put1kInfohash benchmarks the PutSeeder method of a PeerStore by cycling
+// Put1kInfohash benchmarks the PutSeeder method of a Storage by cycling
 // through 1000 infohashes and putting the same peer into their swarms.
 //
 // Put1kInfohash can run in parallel.
-func Put1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func Put1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		return ps.PutSeeder(bd.infohashes[i%1000], bd.peers[0])
 	})
 }

-// Put1kInfohash1k benchmarks the PutSeeder method of a PeerStore by cycling
+// Put1kInfohash1k benchmarks the PutSeeder method of a Storage by cycling
 // through 1000 infohashes and 1000 Peers and calling Put with them.
 //
 // Put1kInfohash1k can run in parallel.
-func Put1kInfohash1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func Put1kInfohash1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutSeeder(bd.infohashes[i%1000], bd.peers[(i*3)%1000])
 		return err
 	})
 }

-// PutDelete benchmarks the PutSeeder and DeleteSeeder methods of a PeerStore by
+// PutDelete benchmarks the PutSeeder and DeleteSeeder methods of a Storage by
 // calling PutSeeder followed by DeleteSeeder for one Peer and one infohash.
 //
 // PutDelete can not run in parallel.
-func PutDelete(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutDelete(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutSeeder(bd.infohashes[0], bd.peers[0])
 		if err != nil {
 			return err
@@ -163,8 +163,8 @@ func PutDelete(b *testing.B, ps PeerStore) {
 // PutDelete does, but with one from 1000 Peers per iteration.
 //
 // PutDelete1k can not run in parallel.
-func PutDelete1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutDelete1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutSeeder(bd.infohashes[0], bd.peers[i%1000])
 		if err != nil {
 			return err
@@ -177,8 +177,8 @@ func PutDelete1k(b *testing.B, ps PeerStore) {
 // 1000 Peers.
 //
 // PutDelete1kInfohash can not run in parallel.
-func PutDelete1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutDelete1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutSeeder(bd.infohashes[i%1000], bd.peers[0])
 		if err != nil {
 		}
@@ -190,8 +190,8 @@ func PutDelete1kInfohash(b *testing.B, ps PeerStore) {
 // addition to 1000 Peers.
 //
 // PutDelete1kInfohash1k can not run in parallel.
-func PutDelete1kInfohash1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutDelete1kInfohash1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutSeeder(bd.infohashes[i%1000], bd.peers[(i*3)%1000])
 		if err != nil {
 			return err
@@ -201,102 +201,102 @@ func PutDelete1kInfohash1k(b *testing.B, ps PeerStore) {
 	})
 }

-// DeleteNonexist benchmarks the DeleteSeeder method of a PeerStore by
+// DeleteNonexist benchmarks the DeleteSeeder method of a Storage by
 // attempting to delete a Peer that is nonexistent.
 //
 // DeleteNonexist can run in parallel.
-func DeleteNonexist(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func DeleteNonexist(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.DeleteSeeder(bd.infohashes[0], bd.peers[0])
 		return nil
 	})
 }

-// DeleteNonexist1k benchmarks the DeleteSeeder method of a PeerStore by
+// DeleteNonexist1k benchmarks the DeleteSeeder method of a Storage by
 // attempting to delete one of 1000 nonexistent Peers.
 //
 // DeleteNonexist can run in parallel.
-func DeleteNonexist1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func DeleteNonexist1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.DeleteSeeder(bd.infohashes[0], bd.peers[i%1000])
 		return nil
 	})
 }

-// DeleteNonexist1kInfohash benchmarks the DeleteSeeder method of a PeerStore by
+// DeleteNonexist1kInfohash benchmarks the DeleteSeeder method of a Storage by
 // attempting to delete one Peer from one of 1000 infohashes.
 //
 // DeleteNonexist1kInfohash can run in parallel.
-func DeleteNonexist1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func DeleteNonexist1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.DeleteSeeder(bd.infohashes[i%1000], bd.peers[0])
 		return nil
 	})
 }

-// DeleteNonexist1kInfohash1k benchmarks the Delete method of a PeerStore by
+// DeleteNonexist1kInfohash1k benchmarks the Delete method of a Storage by
 // attempting to delete one of 1000 Peers from one of 1000 Infohashes.
 //
 // DeleteNonexist1kInfohash1k can run in parallel.
-func DeleteNonexist1kInfohash1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func DeleteNonexist1kInfohash1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.DeleteSeeder(bd.infohashes[i%1000], bd.peers[(i*3)%1000])
 		return nil
 	})
 }

-// GradNonexist benchmarks the GraduateLeecher method of a PeerStore by
+// GradNonexist benchmarks the GraduateLeecher method of a Storage by
 // attempting to graduate a nonexistent Peer.
 //
 // GradNonexist can run in parallel.
-func GradNonexist(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func GradNonexist(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.GraduateLeecher(bd.infohashes[0], bd.peers[0])
 		return nil
 	})
 }

-// GradNonexist1k benchmarks the GraduateLeecher method of a PeerStore by
+// GradNonexist1k benchmarks the GraduateLeecher method of a Storage by
 // attempting to graduate one of 1000 nonexistent Peers.
 //
 // GradNonexist1k can run in parallel.
-func GradNonexist1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func GradNonexist1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.GraduateLeecher(bd.infohashes[0], bd.peers[i%1000])
 		return nil
 	})
 }

-// GradNonexist1kInfohash benchmarks the GraduateLeecher method of a PeerStore
+// GradNonexist1kInfohash benchmarks the GraduateLeecher method of a Storage
 // by attempting to graduate a nonexistent Peer for one of 100 Infohashes.
 //
 // GradNonexist1kInfohash can run in parallel.
-func GradNonexist1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func GradNonexist1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.GraduateLeecher(bd.infohashes[i%1000], bd.peers[0])
 		return nil
 	})
 }

-// GradNonexist1kInfohash1k benchmarks the GraduateLeecher method of a PeerStore
+// GradNonexist1kInfohash1k benchmarks the GraduateLeecher method of a Storage
 // by attempting to graduate one of 1000 nonexistent Peers for one of 1000
 // infohashes.
 //
 // GradNonexist1kInfohash1k can run in parallel.
-func GradNonexist1kInfohash1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, nil, func(i int, ps PeerStore, bd *benchData) error {
+func GradNonexist1kInfohash1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, nil, func(i int, ps Storage, bd *benchData) error {
 		ps.GraduateLeecher(bd.infohashes[i%1000], bd.peers[(i*3)%1000])
 		return nil
 	})
 }

 // PutGradDelete benchmarks the PutLeecher, GraduateLeecher and DeleteSeeder
-// methods of a PeerStore by adding one leecher to a swarm, promoting it to a
+// methods of a Storage by adding one leecher to a swarm, promoting it to a
 // seeder and deleting the seeder.
 //
 // PutGradDelete can not run in parallel.
-func PutGradDelete(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutGradDelete(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutLeecher(bd.infohashes[0], bd.peers[0])
 		if err != nil {
 			return err
@@ -312,8 +312,8 @@ func PutGradDelete(b *testing.B, ps PeerStore) {
 // PutGradDelete1k behaves like PutGradDelete with one of 1000 Peers.
 //
 // PutGradDelete1k can not run in parallel.
-func PutGradDelete1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutGradDelete1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutLeecher(bd.infohashes[0], bd.peers[i%1000])
 		if err != nil {
 			return err
@@ -330,8 +330,8 @@ func PutGradDelete1k(b *testing.B, ps PeerStore) {
 // infohashes.
 //
 // PutGradDelete1kInfohash can not run in parallel.
-func PutGradDelete1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutGradDelete1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutLeecher(bd.infohashes[i%1000], bd.peers[0])
 		if err != nil {
 			return err
@@ -348,8 +348,8 @@ func PutGradDelete1kInfohash(b *testing.B, ps PeerStore) {
 // and one of 1000 infohashes.
 //
 // PutGradDelete1kInfohash can not run in parallel.
-func PutGradDelete1kInfohash1k(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, false, nil, func(i int, ps PeerStore, bd *benchData) error {
+func PutGradDelete1kInfohash1k(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, false, nil, func(i int, ps Storage, bd *benchData) error {
 		err := ps.PutLeecher(bd.infohashes[i%1000], bd.peers[(i*3)%1000])
 		if err != nil {
 			return err
@@ -363,7 +363,7 @@ func PutGradDelete1kInfohash1k(b *testing.B, ps PeerStore) {
 	})
 }

-func putPeers(ps PeerStore, bd *benchData) error {
+func putPeers(ps Storage, bd *benchData) error {
 	for i := 0; i < 1000; i++ {
 		for j := 0; j < 1000; j++ {
 			var err error
@@ -380,13 +380,13 @@ func putPeers(ps PeerStore, bd *benchData) error {
 	return nil
 }

-// AnnounceLeecher benchmarks the AnnouncePeers method of a PeerStore for
+// AnnounceLeecher benchmarks the AnnouncePeers method of a Storage for
 // announcing a leecher.
 // The swarm announced to has 500 seeders and 500 leechers.
 //
 // AnnounceLeecher can run in parallel.
-func AnnounceLeecher(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, putPeers, func(i int, ps PeerStore, bd *benchData) error {
+func AnnounceLeecher(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, putPeers, func(i int, ps Storage, bd *benchData) error {
 		_, err := ps.AnnouncePeers(bd.infohashes[0], false, 50, bd.peers[0])
 		return err
 	})
@@ -396,8 +396,8 @@ func AnnounceLeecher(b *testing.B, ps PeerStore) {
 // infohashes.
 //
 // AnnounceLeecher1kInfohash can run in parallel.
-func AnnounceLeecher1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, putPeers, func(i int, ps PeerStore, bd *benchData) error {
+func AnnounceLeecher1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, putPeers, func(i int, ps Storage, bd *benchData) error {
 		_, err := ps.AnnouncePeers(bd.infohashes[i%1000], false, 50, bd.peers[0])
 		return err
 	})
@@ -407,8 +407,8 @@ func AnnounceLeecher1kInfohash(b *testing.B, ps PeerStore) {
 // leecher.
 //
 // AnnounceSeeder can run in parallel.
-func AnnounceSeeder(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, putPeers, func(i int, ps PeerStore, bd *benchData) error {
+func AnnounceSeeder(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, putPeers, func(i int, ps Storage, bd *benchData) error {
 		_, err := ps.AnnouncePeers(bd.infohashes[0], true, 50, bd.peers[0])
 		return err
 	})
@@ -418,19 +418,19 @@ func AnnounceSeeder(b *testing.B, ps PeerStore) {
 // infohashes.
 //
 // AnnounceSeeder1kInfohash can run in parallel.
-func AnnounceSeeder1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, putPeers, func(i int, ps PeerStore, bd *benchData) error {
+func AnnounceSeeder1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, putPeers, func(i int, ps Storage, bd *benchData) error {
 		_, err := ps.AnnouncePeers(bd.infohashes[i%1000], true, 50, bd.peers[0])
 		return err
 	})
 }

-// ScrapeSwarm benchmarks the ScrapeSwarm method of a PeerStore.
+// ScrapeSwarm benchmarks the ScrapeSwarm method of a Storage.
 // The swarm scraped has 500 seeders and 500 leechers.
 //
 // ScrapeSwarm can run in parallel.
-func ScrapeSwarm(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, putPeers, func(i int, ps PeerStore, bd *benchData) error {
+func ScrapeSwarm(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, putPeers, func(i int, ps Storage, bd *benchData) error {
 		ps.ScrapeSwarm(bd.infohashes[0], bittorrent.IPv4)
 		return nil
 	})
@@ -439,8 +439,8 @@ func ScrapeSwarm(b *testing.B, ps PeerStore) {
 // ScrapeSwarm1kInfohash behaves like ScrapeSwarm with one of 1000 infohashes.
 //
 // ScrapeSwarm1kInfohash can run in parallel.
-func ScrapeSwarm1kInfohash(b *testing.B, ps PeerStore) {
-	runBenchmark(b, ps, true, putPeers, func(i int, ps PeerStore, bd *benchData) error {
+func ScrapeSwarm1kInfohash(b *testing.B, ps Storage) {
+	runBenchmark(b, ps, true, putPeers, func(i int, ps Storage, bd *benchData) error {
 		ps.ScrapeSwarm(bd.infohashes[i%1000], bittorrent.IPv4)
 		return nil
 	})
--- a/storage/storage_tests.go
+++ b/storage/storage_tests.go
@@ -11,30 +11,34 @@ import (

 // PeerEqualityFunc is the boolean function to use to check two Peers for
 // equality.
-// Depending on the implementation of the PeerStore, this can be changed to
+// Depending on the implementation of the Storage, this can be changed to
 // use (Peer).EqualEndpoint instead.
 var PeerEqualityFunc = func(p1, p2 bittorrent.Peer) bool { return p1.Equal(p2) }

-// TestPeerStore tests a PeerStore implementation against the interface.
-func TestPeerStore(t *testing.T, p PeerStore) {
-	ih0, _ := bittorrent.InfoHashFromString("00000000000000000001")
-	ih1, _ := bittorrent.InfoHashFromString("00000000000000000002")
+// TestPeerStore tests a Storage implementation against the interface.
+func TestPeerStore(t *testing.T, p Storage) {
+	ih0, _ := bittorrent.NewInfoHash([]byte("00000000000000000001"))
+	ih1, _ := bittorrent.NewInfoHash([]byte("00000000000000000002"))
+	id0, _ := bittorrent.NewPeerID([]byte("00000000000000000001"))
+	id1, _ := bittorrent.NewPeerID([]byte("00000000000000000001"))
+	id2, _ := bittorrent.NewPeerID([]byte("00000000000000000001"))
+	id3, _ := bittorrent.NewPeerID([]byte("00000000000000000001"))
 	testData := []struct {
 		ih   bittorrent.InfoHash
 		peer bittorrent.Peer
 	}{
 		{
 			ih0,
-			bittorrent.Peer{ID: bittorrent.PeerIDFromString("00000000000000000001"), Port: 1, IP: bittorrent.IP{IP: net.ParseIP("1.1.1.1").To4(), AddressFamily: bittorrent.IPv4}},
+			bittorrent.Peer{ID: id0, Port: 1, IP: bittorrent.IP{IP: net.ParseIP("1.1.1.1").To4(), AddressFamily: bittorrent.IPv4}},
 		},
 		{
 			ih1,
-			bittorrent.Peer{ID: bittorrent.PeerIDFromString("00000000000000000002"), Port: 2, IP: bittorrent.IP{IP: net.ParseIP("abab::0001"), AddressFamily: bittorrent.IPv6}},
+			bittorrent.Peer{ID: id1, Port: 2, IP: bittorrent.IP{IP: net.ParseIP("abab::0001"), AddressFamily: bittorrent.IPv6}},
 		},
 	}

-	v4Peer := bittorrent.Peer{ID: bittorrent.PeerIDFromString("99999999999999999994"), IP: bittorrent.IP{IP: net.ParseIP("99.99.99.99").To4(), AddressFamily: bittorrent.IPv4}, Port: 9994}
-	v6Peer := bittorrent.Peer{ID: bittorrent.PeerIDFromString("99999999999999999996"), IP: bittorrent.IP{IP: net.ParseIP("fc00::0001"), AddressFamily: bittorrent.IPv6}, Port: 9996}
+	v4Peer := bittorrent.Peer{ID: id2, IP: bittorrent.IP{IP: net.ParseIP("99.99.99.99").To4(), AddressFamily: bittorrent.IPv4}, Port: 9994}
+	v6Peer := bittorrent.Peer{ID: id3, IP: bittorrent.IP{IP: net.ParseIP("fc00::0001"), AddressFamily: bittorrent.IPv6}, Port: 9996}

 	for _, c := range testData {
 		peer := v4Peer