Fix Deepsource error.

cmd/gossamer/account.go

@@ -118,7 +118,7 @@ func getKeystorePassword(ctx *cli.Context) []byte {
 // unlockKeystore compares the length of passwords to the length of accounts,
 // prompts the user for a password if no password is provided, and then unlocks
 // the accounts within the provided keystore
-func unlockKeystore(ks keystore.Keystore, basepath string, unlock string, password string) error {
+func unlockKeystore(ks keystore.Keystore, basepath, unlock, password string) error {
 	var passwords []string
 
 	if password != "" {

cmd/gossamer/main.go

@@ -378,7 +378,8 @@ func buildSpecAction(ctx *cli.Context) error {
 	if bs == nil {
 		return fmt.Errorf("error building genesis")
 	}
-	res := []byte{} //nolint
+
+	var res []byte
 	if ctx.Bool(RawFlag.Name) {
 		res, err = bs.ToJSONRaw()
 	} else {

cmd/gossamer/utils.go

@@ -75,7 +75,7 @@ func confirmMessage(msg string) bool {
 	fmt.Print("> ")
 	for {
 		text, _ := reader.ReadString('\n')
-		text = strings.Replace(text, "\n", "", -1)
+		text = strings.ReplaceAll(text, "\n", "")
 		return strings.Compare("Y", text) == 0
 	}
 }

dot/core/service_test.go

@@ -17,6 +17,7 @@
 package core
 
 import (
+	"io"
 	"math/big"
 	"os"
 	"sort"
@@ -36,6 +37,32 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+type mockDigestItem struct {
+	i int
+}
+
+func newMockDigestItem(i int) *mockDigestItem {
+	return &mockDigestItem{
+		i: i,
+	}
+}
+
+func (d *mockDigestItem) String() string {
+	return ""
+}
+
+func (d *mockDigestItem) Type() byte {
+	return byte(d.i)
+}
+
+func (d *mockDigestItem) Encode() ([]byte, error) {
+	return []byte{byte(d.i)}, nil
+}
+
+func (d *mockDigestItem) Decode(_ io.Reader) error {
+	return nil
+}
+
 func addTestBlocksToState(t *testing.T, depth int, blockState BlockState) []*types.Header {
 	return addTestBlocksToStateWithParent(t, blockState.BestBlockHash(), depth, blockState)
 }
@@ -374,7 +401,7 @@ func TestService_HandleSubmittedExtrinsic(t *testing.T) {
 	s := NewTestService(t, nil)
 
 	parentHash := common.MustHexToHash("0x35a28a7dbaf0ba07d1485b0f3da7757e3880509edc8c31d0850cb6dd6219361d")
-	header, err := types.NewHeader(parentHash, big.NewInt(1), common.Hash{}, common.Hash{}, types.NewEmptyDigest())
+	header, err := types.NewHeader(parentHash, common.Hash{}, common.Hash{}, big.NewInt(1), types.NewEmptyDigest())
 	require.NoError(t, err)
 
 	//initialize block header

dot/core/test_helpers.go

@@ -17,7 +17,6 @@
 package core
 
 import (
-	"io"
 	"io/ioutil"
 	"math/big"
 	"testing"
@@ -51,7 +50,7 @@ func newTestGenesisWithTrieAndHeader(t *testing.T) (*genesis.Genesis, *trie.Trie
 	genTrie, err := genesis.NewTrieFromGenesis(gen)
 	require.NoError(t, err)
 
-	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), big.NewInt(0), genTrie.MustHash(), trie.EmptyHash, types.Digest{})
+	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), genTrie.MustHash(), trie.EmptyHash, big.NewInt(0), types.Digest{})
 	require.NoError(t, err)
 	return gen, genTrie, genesisHeader
 }
@@ -263,32 +262,6 @@ func (s *mockSyncer) IsSynced() bool {
 
 func (s *mockSyncer) SetSyncing(bool) {}
 
-type mockDigestItem struct { //nolint
-	i int
-}
-
-func newMockDigestItem(i int) *mockDigestItem { //nolint
-	return &mockDigestItem{
-		i: i,
-	}
-}
-
-func (d *mockDigestItem) String() string { //nolint
-	return ""
-}
-
-func (d *mockDigestItem) Type() byte { //nolint
-	return byte(d.i)
-}
-
-func (d *mockDigestItem) Encode() ([]byte, error) { //nolint
-	return []byte{byte(d.i)}, nil
-}
-
-func (d *mockDigestItem) Decode(_ io.Reader) error { //nolint
-	return nil
-}
-
 type mockTransactionHandler struct{}
 
 func (h *mockTransactionHandler) HandleTransactionMessage(_ *network.TransactionMessage) error {

dot/network/sync.go

@@ -781,13 +781,7 @@ func (q *syncQueue) handleBlockAnnounceHandshake(blockNum uint32, from peer.ID)
 func (q *syncQueue) handleBlockAnnounce(msg *BlockAnnounceMessage, from peer.ID) {
 	q.updatePeerScore(from, 1)
 
-	header, err := types.NewHeader(
-		msg.ParentHash,
-		msg.Number,
-		msg.StateRoot,
-		msg.ExtrinsicsRoot,
-		msg.Digest,
-	)
+	header, err := types.NewHeader(msg.ParentHash, msg.StateRoot, msg.ExtrinsicsRoot, msg.Number, msg.Digest)
 	if err != nil {
 		logger.Error("failed to create header from BlockAnnounce", "error", err)
 		return

dot/node_test.go

@@ -222,7 +222,7 @@ func TestInitNode_LoadGenesisData(t *testing.T) {
 	genTrie, err := genesis.NewTrieFromGenesis(gen)
 	require.NoError(t, err)
 
-	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), big.NewInt(0), genTrie.MustHash(), trie.EmptyHash, types.Digest{})
+	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), genTrie.MustHash(), trie.EmptyHash, big.NewInt(0), types.Digest{})
 	require.NoError(t, err)
 
 	err = stateSrvc.Initialize(gen, genesisHeader, genTrie)
@@ -253,7 +253,7 @@ func TestInitNode_LoadGenesisData(t *testing.T) {
 	require.NoError(t, err)
 
 	stateRoot := genesisHeader.StateRoot
-	expectedHeader, err := types.NewHeader(common.NewHash([]byte{0}), big.NewInt(0), stateRoot, trie.EmptyHash, types.NewEmptyDigest())
+	expectedHeader, err := types.NewHeader(common.NewHash([]byte{0}), stateRoot, trie.EmptyHash, big.NewInt(0), types.NewEmptyDigest())
 	require.NoError(t, err)
 	require.Equal(t, expectedHeader.Hash(), genesisHeader.Hash())
 }

dot/rpc/helpers.go

@@ -34,8 +34,8 @@ func LocalhostFilter() *ipfilter.IPFilter {
 
 // LocalRequestOnly HTTP handler to restrict to only local connections
 func LocalRequestOnly(r *rpc.RequestInfo, i interface{}) error {
-	ip, _, error := net.SplitHostPort(r.Request.RemoteAddr)
-	if error != nil {
+	ip, _, err := net.SplitHostPort(r.Request.RemoteAddr)
+	if err != nil {
 		return errors.New("unable to parse IP")
 	}
 	f := LocalhostFilter()

dot/rpc/modules/chain.go

@@ -203,7 +203,7 @@ func (cm *ChainModule) unwindRequest(req interface{}) ([]string, error) {
 			if err != nil {
 				return nil, err
 			}
-			res = append(res, u[:]...)
+			res = append(res, u...)
 		}
 	case interface{}:
 		h, err := cm.lookupHashByInterface(x)

dot/rpc/modules/chain_test.go

@@ -315,7 +315,7 @@ func newTestGenesisWithTrieAndHeader() (*genesis.Genesis, *trie.Trie, *types.Hea
 		panic(err)
 	}
 
-	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), big.NewInt(0), genTrie.MustHash(), trie.EmptyHash, types.Digest{}) //nolint
+	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), genTrie.MustHash(), trie.EmptyHash, big.NewInt(0), types.Digest{}) //nolint
 	if err != nil {
 		panic(err)
 	}

dot/rpc/modules/state.go

@@ -240,7 +240,7 @@ func (sm *StateModule) GetChildStorageSize(r *http.Request, req *StateChildStora
 
 // GetKeysPaged Returns the keys with prefix with pagination support.
 func (sm *StateModule) GetKeysPaged(r *http.Request, req *StateStorageKeyRequest, res *StateStorageKeysResponse) error {
-	if len(req.Prefix) == 0 {
+	if req.Prefix == "" {
 		req.Prefix = "0x"
 	}
 	hPrefix, err := common.HexToBytes(req.Prefix)

dot/rpc/modules/system.go

@@ -160,7 +160,7 @@ func (sm *SystemModule) NodeRoles(r *http.Request, req *EmptyRequest, res *[]int
 
 // AccountNextIndex Returns the next valid index (aka. nonce) for given account.
 func (sm *SystemModule) AccountNextIndex(r *http.Request, req *StringRequest, res *U64Response) error {
-	if req == nil || len(req.String) == 0 {
+	if req == nil || req.String == "" {
 		return errors.New("account address must be valid")
 	}
 	addressPubKey := crypto.PublicAddressToByteArray(common.Address(req.String))

dot/rpc/subscription/websocket.go

@@ -57,7 +57,7 @@ func (c *WSConn) HandleComm() {
 			logger.Warn("websocket failed to read message", "error", err)
 			return
 		}
-		logger.Debug("websocket received", "message", fmt.Sprintf("%s", mbytes))
+		logger.Debug("websocket received", "message", mbytes)
 
 		// determine if request is for subscribe method type
 		var msg map[string]interface{}

dot/state/service.go

@@ -158,11 +158,8 @@ func (s *Service) Initialize(gen *genesis.Genesis, header *types.Header, t *trie
 		s.Storage = storageState
 		s.Block = blockState
 		s.Epoch = epochState
-	} else {
-		// close database
-		if err = db.Close(); err != nil {
-			return fmt.Errorf("failed to close database: %s", err)
-		}
+	} else if err = db.Close(); err != nil {
+		return fmt.Errorf("failed to close database: %s", err)
 	}
 
 	logger.Info("state", "genesis hash", blockState.genesisHash)

dot/state/service_test.go

@@ -39,7 +39,7 @@ func newTestGenesisWithTrieAndHeader(t *testing.T) (*genesis.Genesis, *trie.Trie
 	genTrie, err := genesis.NewTrieFromGenesis(gen)
 	require.NoError(t, err)
 
-	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), big.NewInt(0), genTrie.MustHash(), trie.EmptyHash, types.Digest{})
+	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), genTrie.MustHash(), trie.EmptyHash, big.NewInt(0), types.Digest{})
 	require.NoError(t, err)
 	return gen, genTrie, genesisHeader
 }
@@ -81,7 +81,7 @@ func TestService_Initialize(t *testing.T) {
 	err := state.Initialize(genData, genesisHeader, genTrie)
 	require.NoError(t, err)
 
-	genesisHeader, err = types.NewHeader(common.NewHash([]byte{77}), big.NewInt(0), genTrie.MustHash(), trie.EmptyHash, types.Digest{})
+	genesisHeader, err = types.NewHeader(common.NewHash([]byte{77}), genTrie.MustHash(), trie.EmptyHash, big.NewInt(0), types.Digest{})
 	require.NoError(t, err)
 
 	err = state.Initialize(genData, genesisHeader, genTrie)

dot/sync/syncer.go

@@ -121,13 +121,7 @@ func (s *Service) HandleBlockAnnounce(msg *network.BlockAnnounceMessage) error {
 	logger.Debug("received BlockAnnounceMessage")
 
 	// create header from message
-	header, err := types.NewHeader(
-		msg.ParentHash,
-		msg.Number,
-		msg.StateRoot,
-		msg.ExtrinsicsRoot,
-		msg.Digest,
-	)
+	header, err := types.NewHeader(msg.ParentHash, msg.StateRoot, msg.ExtrinsicsRoot, msg.Number, msg.Digest)
 	if err != nil {
 		return err
 	}

dot/sync/syncer_test.go

@@ -48,7 +48,7 @@ func newTestGenesisWithTrieAndHeader(t *testing.T) (*genesis.Genesis, *trie.Trie
 	genTrie, err := genesis.NewTrieFromGenesis(gen)
 	require.NoError(t, err)
 
-	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), big.NewInt(0), genTrie.MustHash(), trie.EmptyHash, types.Digest{})
+	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), genTrie.MustHash(), trie.EmptyHash, big.NewInt(0), types.Digest{})
 	require.NoError(t, err)
 	return gen, genTrie, genesisHeader
 }

dot/types/block_test.go

@@ -126,13 +126,13 @@ func TestDeepCopyBlock(t *testing.T) {
 }
 
 func TestMustEncodeBlock(t *testing.T) {
-	h1, err := NewHeader(common.Hash{}, big.NewInt(0), common.Hash{}, common.Hash{}, Digest{})
+	h1, err := NewHeader(common.Hash{}, common.Hash{}, common.Hash{}, big.NewInt(0), Digest{})
 	require.NoError(t, err)
 	b1 := NewBlock(h1, NewBody([]byte{}))
 	enc, err := b1.Encode()
 	require.NoError(t, err)
 
-	h2, err := NewHeader(common.Hash{0x1, 0x2}, big.NewInt(0), common.Hash{}, common.Hash{}, Digest{})
+	h2, err := NewHeader(common.Hash{0x1, 0x2}, common.Hash{}, common.Hash{}, big.NewInt(0), Digest{})
 	require.NoError(t, err)
 	b2 := NewBlock(h2, NewBody([]byte{0xa, 0xb}))
 	enc2, err := b2.Encode()

dot/types/header.go

@@ -38,7 +38,7 @@ type Header struct {
 }
 
 // NewHeader creates a new block header and sets its hash field
-func NewHeader(parentHash common.Hash, number *big.Int, stateRoot common.Hash, extrinsicsRoot common.Hash, digest []DigestItem) (*Header, error) {
+func NewHeader(parentHash, stateRoot, extrinsicsRoot common.Hash, number *big.Int, digest []DigestItem) (*Header, error) {
 	if number == nil {
 		// Hash() will panic if number is nil
 		return nil, errors.New("cannot have nil block number")

dot/types/header_test.go

@@ -27,7 +27,7 @@ import (
 )
 
 func TestDecodeHeader(t *testing.T) {
-	header, err := NewHeader(common.Hash{}, big.NewInt(0), common.Hash{}, common.Hash{}, Digest{})
+	header, err := NewHeader(common.Hash{}, common.Hash{}, common.Hash{}, big.NewInt(0), Digest{})
 	require.NoError(t, err)
 
 	enc, err := header.Encode()
@@ -42,7 +42,7 @@ func TestDecodeHeader(t *testing.T) {
 }
 
 func TestMustEncodeHeader(t *testing.T) {
-	bh1, err := NewHeader(common.Hash{}, big.NewInt(0), common.Hash{}, common.Hash{}, Digest{})
+	bh1, err := NewHeader(common.Hash{}, common.Hash{}, common.Hash{}, big.NewInt(0), Digest{})
 	require.NoError(t, err)
 	enc, err := bh1.Encode()
 	require.NoError(t, err)
@@ -58,7 +58,7 @@ func TestMustEncodeHeader(t *testing.T) {
 		},
 	}
 
-	bh2, err := NewHeader(common.Hash{}, big.NewInt(0), common.Hash{}, common.Hash{}, testDigest)
+	bh2, err := NewHeader(common.Hash{}, common.Hash{}, common.Hash{}, big.NewInt(0), testDigest)
 	require.NoError(t, err)
 	enc2, err := bh2.Encode()
 	require.NoError(t, err)

lib/babe/babe_test.go

@@ -71,7 +71,7 @@ func newTestGenesisWithTrieAndHeader(t *testing.T) (*genesis.Genesis, *trie.Trie
 	genTrie, err := genesis.NewTrieFromGenesis(gen)
 	require.NoError(t, err)
 
-	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), big.NewInt(0), genTrie.MustHash(), trie.EmptyHash, types.Digest{}) //nolint
+	genesisHeader, err := types.NewHeader(common.NewHash([]byte{0}), genTrie.MustHash(), trie.EmptyHash, big.NewInt(0), types.Digest{}) //nolint
 	require.NoError(t, err)
 	return gen, genTrie, genesisHeader
 }

lib/babe/build.go

@@ -51,7 +51,7 @@ func (b *Service) buildBlock(parent *types.Header, slot Slot) (*types.Block, err
 
 	// create new block header
 	number := big.NewInt(0).Add(parent.Number, big.NewInt(1))
-	header, err := types.NewHeader(parent.Hash(), number, common.Hash{}, common.Hash{}, types.NewEmptyDigest())
+	header, err := types.NewHeader(parent.Hash(), common.Hash{}, common.Hash{}, number, types.NewEmptyDigest())
 	if err != nil {
 		return nil, err
 	}

lib/babe/build_test.go

@@ -48,7 +48,7 @@ func TestSeal(t *testing.T) {
 	zeroHash, err := common.HexToHash("0x00")
 	require.NoError(t, err)
 
-	header, err := types.NewHeader(zeroHash, big.NewInt(0), zeroHash, zeroHash, types.Digest{})
+	header, err := types.NewHeader(zeroHash, zeroHash, zeroHash, big.NewInt(0), types.Digest{})
 	require.NoError(t, err)
 
 	encHeader, err := header.Encode()
@@ -156,7 +156,7 @@ func TestApplyExtrinsic(t *testing.T) {
 	babeService.epochData.threshold = maxThreshold
 
 	parentHash := common.MustHexToHash("0x35a28a7dbaf0ba07d1485b0f3da7757e3880509edc8c31d0850cb6dd6219361d")
-	header, err := types.NewHeader(parentHash, big.NewInt(1), common.Hash{}, common.Hash{}, types.NewEmptyDigest())
+	header, err := types.NewHeader(parentHash, common.Hash{}, common.Hash{}, big.NewInt(1), types.NewEmptyDigest())
 	require.NoError(t, err)
 
 	//initialize block header
@@ -191,7 +191,7 @@ func TestBuildAndApplyExtrinsic(t *testing.T) {
 	babeService.epochData.threshold = maxThreshold
 
 	parentHash := common.MustHexToHash("0x35a28a7dbaf0ba07d1485b0f3da7757e3880509edc8c31d0850cb6dd6219361d")
-	header, err := types.NewHeader(parentHash, big.NewInt(1), common.Hash{}, common.Hash{}, types.NewEmptyDigest())
+	header, err := types.NewHeader(parentHash, common.Hash{}, common.Hash{}, big.NewInt(1), types.NewEmptyDigest())
 	require.NoError(t, err)
 
 	//initialize block header

lib/babe/median.go

@@ -82,7 +82,7 @@ func (b *Service) getCurrentSlot() (uint64, error) {
 
 // slotTime calculates the slot time in the form of seconds since the unix epoch
 // for a given slot in seconds, returns 0 and an error if it can't be calculated
-func (b *Service) slotTime(slot uint64, slotTail uint64) (uint64, error) {
+func (b *Service) slotTime(slot, slotTail uint64) (uint64, error) {
 	var at []uint64
 
 	head := b.blockState.BestBlockHash()
@@ -162,7 +162,7 @@ func median(l []uint64) (uint64, error) {
 }
 
 // slotOffset returns the number of slots between slot
-func slotOffset(start uint64, end uint64) (uint64, error) {
+func slotOffset(start, end uint64) (uint64, error) {
 	os := end - start
 	if end < start {
 		return 0, errors.New("cannot have negative Slot Offset")