diff --git a/swarm/storage/chunker.go b/swarm/storage/chunker.go
index 0fa5026dcd..5b36b477e0 100644
--- a/swarm/storage/chunker.go
+++ b/swarm/storage/chunker.go
@@ -25,7 +25,7 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/metrics"
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 	"github.com/ethereum/go-ethereum/swarm/log"
 	"github.com/ethereum/go-ethereum/swarm/spancontext"
 	opentracing "github.com/opentracing/opentracing-go"
@@ -127,7 +127,7 @@ type TreeChunker struct {
 func TreeJoin(ctx context.Context, addr Address, getter Getter, depth int) *LazyChunkReader {
 	jp := &JoinerParams{
 		ChunkerParams: ChunkerParams{
-			chunkSize: ch.DefaultSize,
+			chunkSize: chunk.DefaultSize,
 			hashSize:  int64(len(addr)),
 		},
 		addr:   addr,
@@ -147,7 +147,7 @@ func TreeSplit(ctx context.Context, data io.Reader, size int64, putter Putter) (
 	tsp := &TreeSplitterParams{
 		SplitterParams: SplitterParams{
 			ChunkerParams: ChunkerParams{
-				chunkSize: ch.DefaultSize,
+				chunkSize: chunk.DefaultSize,
 				hashSize:  putter.RefSize(),
 			},
 			reader: data,
diff --git a/swarm/storage/common_test.go b/swarm/storage/common_test.go
index e74d0f4b84..c4d187b622 100644
--- a/swarm/storage/common_test.go
+++ b/swarm/storage/common_test.go
@@ -29,7 +29,7 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/log"
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 	"github.com/mattn/go-colorable"
 )
 
@@ -94,7 +94,7 @@ func mput(store ChunkStore, n int, f func(i int64) Chunk) (hs []Chunk, err error
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
 	defer cancel()
 	for i := int64(0); i < int64(n); i++ {
-		chunk := f(ch.DefaultSize)
+		chunk := f(chunk.DefaultSize)
 		go func() {
 			select {
 			case errc <- store.Put(ctx, chunk):
diff --git a/swarm/storage/error.go b/swarm/storage/error.go
index 26dc514efc..1e412e55ce 100644
--- a/swarm/storage/error.go
+++ b/swarm/storage/error.go
@@ -16,9 +16,7 @@
 
 package storage
 
-import (
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
-)
+import "github.com/ethereum/go-ethereum/swarm/chunk"
 
 const (
 	ErrInit = iota
@@ -33,6 +31,6 @@ const (
 
 // Errors are the same as the ones in chunk package for backward compatibility.
 var (
-	ErrChunkNotFound = ch.ErrChunkNotFound
-	ErrChunkInvalid  = ch.ErrChunkNotFound
+	ErrChunkNotFound = chunk.ErrChunkNotFound
+	ErrChunkInvalid  = chunk.ErrChunkNotFound
 )
diff --git a/swarm/storage/hasherstore.go b/swarm/storage/hasherstore.go
index a81a9f4128..345ce7430a 100644
--- a/swarm/storage/hasherstore.go
+++ b/swarm/storage/hasherstore.go
@@ -21,7 +21,7 @@ import (
 	"fmt"
 	"sync/atomic"
 
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 	"github.com/ethereum/go-ethereum/swarm/storage/encryption"
 	"golang.org/x/crypto/sha3"
 )
@@ -189,9 +189,9 @@ func (h *hasherStore) decryptChunkData(chunkData ChunkData, encryptionKey encryp
 
 	// removing extra bytes which were just added for padding
 	length := ChunkData(decryptedSpan).Size()
-	for length > ch.DefaultSize {
-		length = length + (ch.DefaultSize - 1)
-		length = length / ch.DefaultSize
+	for length > chunk.DefaultSize {
+		length = length + (chunk.DefaultSize - 1)
+		length = length / chunk.DefaultSize
 		length *= uint64(h.refSize)
 	}
 
@@ -232,11 +232,11 @@ func (h *hasherStore) decrypt(chunkData ChunkData, key encryption.Key) ([]byte,
 }
 
 func (h *hasherStore) newSpanEncryption(key encryption.Key) encryption.Encryption {
-	return encryption.New(key, 0, uint32(ch.DefaultSize/h.refSize), sha3.NewLegacyKeccak256)
+	return encryption.New(key, 0, uint32(chunk.DefaultSize/h.refSize), sha3.NewLegacyKeccak256)
 }
 
 func (h *hasherStore) newDataEncryption(key encryption.Key) encryption.Encryption {
-	return encryption.New(key, int(ch.DefaultSize), 0, sha3.NewLegacyKeccak256)
+	return encryption.New(key, int(chunk.DefaultSize), 0, sha3.NewLegacyKeccak256)
 }
 
 func (h *hasherStore) storeChunk(ctx context.Context, chunk Chunk) {
diff --git a/swarm/storage/ldbstore_test.go b/swarm/storage/ldbstore_test.go
index aa65183e33..d17bd7d0e4 100644
--- a/swarm/storage/ldbstore_test.go
+++ b/swarm/storage/ldbstore_test.go
@@ -28,7 +28,7 @@ import (
 	"testing"
 
 	"github.com/ethereum/go-ethereum/common"
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 	"github.com/ethereum/go-ethereum/swarm/log"
 	"github.com/ethereum/go-ethereum/swarm/storage/mock/mem"
 	ldberrors "github.com/syndtr/goleveldb/leveldb/errors"
@@ -103,7 +103,7 @@ func TestMarkAccessed(t *testing.T) {
 		t.Fatalf("init dbStore failed: %v", err)
 	}
 
-	h := GenerateRandomChunk(ch.DefaultSize)
+	h := GenerateRandomChunk(chunk.DefaultSize)
 
 	db.Put(context.Background(), h)
 
@@ -201,7 +201,7 @@ func testIterator(t *testing.T, mock bool) {
 		t.Fatalf("init dbStore failed: %v", err)
 	}
 
-	chunks := GenerateRandomChunks(ch.DefaultSize, chunkcount)
+	chunks := GenerateRandomChunks(chunk.DefaultSize, chunkcount)
 
 	for i = 0; i < len(chunks); i++ {
 		chunkkeys[i] = chunks[i].Address()
@@ -468,7 +468,7 @@ func testLDBStoreRemoveThenCollectGarbage(t *testing.T) {
 	// put capacity count number of chunks
 	chunks := make([]Chunk, n)
 	for i := 0; i < n; i++ {
-		c := GenerateRandomChunk(ch.DefaultSize)
+		c := GenerateRandomChunk(chunk.DefaultSize)
 		chunks[i] = c
 		log.Trace("generate random chunk", "idx", i, "chunk", c)
 	}
diff --git a/swarm/storage/localstore/localstore_test.go b/swarm/storage/localstore/localstore_test.go
index 88af93dbfe..d3c5a5c624 100644
--- a/swarm/storage/localstore/localstore_test.go
+++ b/swarm/storage/localstore/localstore_test.go
@@ -29,7 +29,6 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/swarm/chunk"
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
 	"github.com/ethereum/go-ethereum/swarm/shed"
 	"github.com/syndtr/goleveldb/leveldb"
 )
@@ -243,7 +242,7 @@ func init() {
 // random data, and their execution time can be decreased
 // using this function.
 func generateTestRandomChunk() chunk.Chunk {
-	data := make([]byte, ch.DefaultSize)
+	data := make([]byte, chunk.DefaultSize)
 	rand.Read(data)
 	key := make([]byte, 32)
 	rand.Read(key)
@@ -261,16 +260,16 @@ func TestGenerateTestRandomChunk(t *testing.T) {
 		t.Errorf("first chunk address length %v, want %v", addrLen, 32)
 	}
 	dataLen := len(c1.Data())
-	if dataLen != ch.DefaultSize {
-		t.Errorf("first chunk data length %v, want %v", dataLen, ch.DefaultSize)
+	if dataLen != chunk.DefaultSize {
+		t.Errorf("first chunk data length %v, want %v", dataLen, chunk.DefaultSize)
 	}
 	addrLen = len(c2.Address())
 	if addrLen != 32 {
 		t.Errorf("second chunk address length %v, want %v", addrLen, 32)
 	}
 	dataLen = len(c2.Data())
-	if dataLen != ch.DefaultSize {
-		t.Errorf("second chunk data length %v, want %v", dataLen, ch.DefaultSize)
+	if dataLen != chunk.DefaultSize {
+		t.Errorf("second chunk data length %v, want %v", dataLen, chunk.DefaultSize)
 	}
 	if bytes.Equal(c1.Address(), c2.Address()) {
 		t.Error("fake chunks addresses do not differ")
diff --git a/swarm/storage/localstore_test.go b/swarm/storage/localstore_test.go
index ec69951c4f..fcadcefa0b 100644
--- a/swarm/storage/localstore_test.go
+++ b/swarm/storage/localstore_test.go
@@ -23,7 +23,7 @@ import (
 	"testing"
 	"time"
 
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 )
 
 var (
@@ -65,7 +65,7 @@ func TestValidator(t *testing.T) {
 	// add content address validator and check puts
 	// bad should fail, good should pass
 	store.Validators = append(store.Validators, NewContentAddressValidator(hashfunc))
-	chunks = GenerateRandomChunks(ch.DefaultSize, 2)
+	chunks = GenerateRandomChunks(chunk.DefaultSize, 2)
 	goodChunk = chunks[0]
 	badChunk = chunks[1]
 	copy(badChunk.Data(), goodChunk.Data())
@@ -83,7 +83,7 @@ func TestValidator(t *testing.T) {
 	var negV boolTestValidator
 	store.Validators = append(store.Validators, negV)
 
-	chunks = GenerateRandomChunks(ch.DefaultSize, 2)
+	chunks = GenerateRandomChunks(chunk.DefaultSize, 2)
 	goodChunk = chunks[0]
 	badChunk = chunks[1]
 	copy(badChunk.Data(), goodChunk.Data())
@@ -101,7 +101,7 @@ func TestValidator(t *testing.T) {
 	var posV boolTestValidator = true
 	store.Validators = append(store.Validators, posV)
 
-	chunks = GenerateRandomChunks(ch.DefaultSize, 2)
+	chunks = GenerateRandomChunks(chunk.DefaultSize, 2)
 	goodChunk = chunks[0]
 	badChunk = chunks[1]
 	copy(badChunk.Data(), goodChunk.Data())
@@ -138,7 +138,7 @@ func putChunks(store *LocalStore, chunks ...Chunk) []error {
 
 func put(store *LocalStore, n int, f func(i int64) Chunk) (hs []Address, errs []error) {
 	for i := int64(0); i < int64(n); i++ {
-		chunk := f(ch.DefaultSize)
+		chunk := f(chunk.DefaultSize)
 		err := store.Put(context.TODO(), chunk)
 		errs = append(errs, err)
 		hs = append(hs, chunk.Address())
@@ -158,7 +158,7 @@ func TestGetFrequentlyAccessedChunkWontGetGarbageCollected(t *testing.T) {
 
 	var chunks []Chunk
 	for i := 0; i < ldbCap; i++ {
-		chunks = append(chunks, GenerateRandomChunk(ch.DefaultSize))
+		chunks = append(chunks, GenerateRandomChunk(chunk.DefaultSize))
 	}
 
 	mostAccessed := chunks[0].Address()
diff --git a/swarm/storage/netstore_test.go b/swarm/storage/netstore_test.go
index 88ec6c28f4..6538776259 100644
--- a/swarm/storage/netstore_test.go
+++ b/swarm/storage/netstore_test.go
@@ -29,7 +29,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/p2p/enode"
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 )
 
 var sourcePeerID = enode.HexID("99d8594b52298567d2ca3f4c441a5ba0140ee9245e26460d01102a52773c73b9")
@@ -114,7 +114,7 @@ func mustNewNetStoreWithFetcher(t *testing.T) (*NetStore, *mockNetFetcher) {
 func TestNetStoreGetAndPut(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
 	defer cancel()
@@ -174,7 +174,7 @@ func TestNetStoreGetAndPut(t *testing.T) {
 func TestNetStoreGetAfterPut(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
 	defer cancel()
@@ -209,7 +209,7 @@ func TestNetStoreGetAfterPut(t *testing.T) {
 func TestNetStoreGetTimeout(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
 	defer cancel()
@@ -261,7 +261,7 @@ func TestNetStoreGetTimeout(t *testing.T) {
 func TestNetStoreGetCancel(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
 
@@ -313,7 +313,7 @@ func TestNetStoreGetCancel(t *testing.T) {
 func TestNetStoreMultipleGetAndPut(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
 	defer cancel()
@@ -387,7 +387,7 @@ func TestNetStoreMultipleGetAndPut(t *testing.T) {
 func TestNetStoreFetchFuncTimeout(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)
 	defer cancel()
@@ -426,7 +426,7 @@ func TestNetStoreFetchFuncTimeout(t *testing.T) {
 func TestNetStoreFetchFuncAfterPut(t *testing.T) {
 	netStore := mustNewNetStore(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
 	defer cancel()
@@ -453,7 +453,7 @@ func TestNetStoreFetchFuncAfterPut(t *testing.T) {
 func TestNetStoreGetCallsRequest(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx := context.WithValue(context.Background(), "hopcount", uint8(5))
 	ctx, cancel := context.WithTimeout(ctx, 200*time.Millisecond)
@@ -481,7 +481,7 @@ func TestNetStoreGetCallsRequest(t *testing.T) {
 func TestNetStoreGetCallsOffer(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	//  If a source peer is added to the context, NetStore will handle it as an offer
 	ctx := context.WithValue(context.Background(), "source", sourcePeerID.String())
@@ -567,7 +567,7 @@ func TestNetStoreFetcherCountPeers(t *testing.T) {
 func TestNetStoreFetchFuncCalledMultipleTimes(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
 	defer cancel()
@@ -632,7 +632,7 @@ func TestNetStoreFetchFuncCalledMultipleTimes(t *testing.T) {
 func TestNetStoreFetcherLifeCycleWithTimeout(t *testing.T) {
 	netStore, fetcher := mustNewNetStoreWithFetcher(t)
 
-	chunk := GenerateRandomChunk(ch.DefaultSize)
+	chunk := GenerateRandomChunk(chunk.DefaultSize)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
 	defer cancel()
diff --git a/swarm/storage/pyramid.go b/swarm/storage/pyramid.go
index ed0f843b93..281bbe9fe3 100644
--- a/swarm/storage/pyramid.go
+++ b/swarm/storage/pyramid.go
@@ -25,7 +25,7 @@ import (
 	"sync"
 	"time"
 
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 	"github.com/ethereum/go-ethereum/swarm/log"
 )
 
@@ -97,11 +97,11 @@ func NewPyramidSplitterParams(addr Address, reader io.Reader, putter Putter, get
 	New chunks to store are store using the putter which the caller provides.
 */
 func PyramidSplit(ctx context.Context, reader io.Reader, putter Putter, getter Getter) (Address, func(context.Context) error, error) {
-	return NewPyramidSplitter(NewPyramidSplitterParams(nil, reader, putter, getter, ch.DefaultSize)).Split(ctx)
+	return NewPyramidSplitter(NewPyramidSplitterParams(nil, reader, putter, getter, chunk.DefaultSize)).Split(ctx)
 }
 
 func PyramidAppend(ctx context.Context, addr Address, reader io.Reader, putter Putter, getter Getter) (Address, func(context.Context) error, error) {
-	return NewPyramidSplitter(NewPyramidSplitterParams(addr, reader, putter, getter, ch.DefaultSize)).Append(ctx)
+	return NewPyramidSplitter(NewPyramidSplitterParams(addr, reader, putter, getter, chunk.DefaultSize)).Append(ctx)
 }
 
 // Entry to create a tree node
diff --git a/swarm/storage/types.go b/swarm/storage/types.go
index a3cc02fd90..2f39685b42 100644
--- a/swarm/storage/types.go
+++ b/swarm/storage/types.go
@@ -25,26 +25,26 @@ import (
 	"io"
 
 	"github.com/ethereum/go-ethereum/swarm/bmt"
-	ch "github.com/ethereum/go-ethereum/swarm/chunk"
+	"github.com/ethereum/go-ethereum/swarm/chunk"
 	"golang.org/x/crypto/sha3"
 )
 
 // MaxPO is the same as chunk.MaxPO for backward compatibility.
-const MaxPO = ch.MaxPO
+const MaxPO = chunk.MaxPO
 
 // AddressLength is the same as chunk.AddressLength for backward compatibility.
-const AddressLength = ch.AddressLength
+const AddressLength = chunk.AddressLength
 
 type SwarmHasher func() SwarmHash
 
 // Address is an alias for chunk.Address for backward compatibility.
-type Address = ch.Address
+type Address = chunk.Address
 
 // Proximity is the same as chunk.Proximity for backward compatibility.
-var Proximity = ch.Proximity
+var Proximity = chunk.Proximity
 
 // ZeroAddr is the same as chunk.ZeroAddr for backward compatibility.
-var ZeroAddr = ch.ZeroAddr
+var ZeroAddr = chunk.ZeroAddr
 
 func MakeHashFunc(hash string) SwarmHasher {
 	switch hash {
@@ -56,7 +56,7 @@ func MakeHashFunc(hash string) SwarmHasher {
 		return func() SwarmHash {
 			hasher := sha3.NewLegacyKeccak256
 			hasherSize := hasher().Size()
-			segmentCount := ch.DefaultSize / hasherSize
+			segmentCount := chunk.DefaultSize / hasherSize
 			pool := bmt.NewTreePool(hasher, segmentCount, bmt.PoolSize)
 			return bmt.New(pool)
 		}
@@ -83,10 +83,10 @@ func (c AddressCollection) Swap(i, j int) {
 }
 
 // Chunk is an alias for chunk.Chunk for backward compatibility.
-type Chunk = ch.Chunk
+type Chunk = chunk.Chunk
 
 // NewChunk is the same as chunk.NewChunk for backward compatibility.
-var NewChunk = ch.NewChunk
+var NewChunk = chunk.NewChunk
 
 func GenerateRandomChunk(dataSize int64) Chunk {
 	hasher := MakeHashFunc(DefaultHash)()
@@ -196,9 +196,9 @@ func NewContentAddressValidator(hasher SwarmHasher) *ContentAddressValidator {
 }
 
 // Validate that the given key is a valid content address for the given data
-func (v *ContentAddressValidator) Validate(chunk Chunk) bool {
-	data := chunk.Data()
-	if l := len(data); l < 9 || l > ch.DefaultSize+8 {
+func (v *ContentAddressValidator) Validate(ch Chunk) bool {
+	data := ch.Data()
+	if l := len(data); l < 9 || l > chunk.DefaultSize+8 {
 		// log.Error("invalid chunk size", "chunk", addr.Hex(), "size", l)
 		return false
 	}
@@ -208,7 +208,7 @@ func (v *ContentAddressValidator) Validate(chunk Chunk) bool {
 	hasher.Write(data[8:])
 	hash := hasher.Sum(nil)
 
-	return bytes.Equal(hash, chunk.Address())
+	return bytes.Equal(hash, ch.Address())
 }
 
 type ChunkStore interface {