Fix issues reported by lint. Part of #1017

_assets/build/xgo/base/build.sh

@@ -46,7 +46,7 @@ function extension {
   fi
 }
 
-# Either set a local build environemnt, or pull any remote imports
+# Either set a local build environment, or pull any remote imports
 if [ "$EXT_GOPATH" != "" ]; then
   # If local builds are requested, inject the sources
   echo "Building locally $1..."

_assets/docs/DEPENDENCIES.md

@@ -1,26 +1,25 @@
 # Dependency Management
+
 [`dep`](https://github.com/golang/dep) is a tool of choice when it comes to dependency management.
 
-## How we use `dep`.
+## How we use `dep`
 
 1. Transitive dependencies of `go-ethereum`. The most important thing for us is
    to be in-sync there. We want to reduce the regression scope.
    Hence, we pin down all the dependencies of `go-ethereum` with SHAs in `Gopkg.toml` when
    importing a new version of upstream. (This is considered a bad practice for
-   `dep` but we are willing to take the risk to keep consitency with the upstream).
+   `dep` but we are willing to take the risk to keep consistency with the upstream).
-
+1. Exclusive `status-go` dependencies. The policy there is to keep them as
-2. Exclusive `status-go` dependencies. The policy there is to keep them as
    fresh as possible. Hence, no constraints for them in the `toml` file.
 
 ## Installing `dep`
 
 `go get -u github.com/golang/dep/cmd/dep`
 
-
 ## Docs (worth reading)
-1. [README](https://github.com/golang/dep/blob/master/README.md)
-2. [F.A.Q.](https://github.com/golang/dep/blob/master/docs/FAQ.md)
 
+1. [README](https://github.com/golang/dep/blob/master/README.md)
+1. [F.A.Q.](https://github.com/golang/dep/blob/master/docs/FAQ.md)
 
 ## Checking-out all dependencies
 
@@ -30,15 +29,17 @@
 `Gopkg.lock` is kept inact if it is in-sync with `Gopkg.toml`. If the `toml`
 file is changed, `dep ensure` will re-generate `Gopkg.lock` as well.
 
-
 ## Adding a new Dependency
-(see [Adding a new dependency](https://github.com/golang/dep#adding-a-dependency))
-1. `$ dep ensure -add github.com/foo/bar`
-2. Commit changes.
 
+(see [Adding a new dependency](https://github.com/golang/dep#adding-a-dependency))
+
+1. `$ dep ensure -add github.com/foo/bar`
+1. Commit changes.
 
 ## Updating a dependency
+
 (see: [Changing a Dependency](https://github.com/golang/dep#changing-dependencies))
+
 1. Update constraint in the `Gopkg.toml` file if needed.
 2. Run `dep ensure -update github.com/foo/bar`
 3. Commit changes.
@@ -51,12 +52,11 @@ file is changed, `dep ensure` will re-generate `Gopkg.lock` as well.
 
 Use the `update-geth` make target. For major releases, provide the GETH_BRANCH parameter. (e.g. `make update-geth GETH_BRANCH=release/1.9`). If there were any changes made, they will be committed while running this target.
 
-## Commiting changes
+## Committing changes
 
 Make sure that you don't commit unnecessary changes to `Gopkg.toml` and
 `Gopkg.lock`.
 
-
 ## Common issues
 
 1. Relative imports and "Could not introduce package, as its subpackage does not contain usable Go code". See [this comment](https://github.com/golang/dep/issues/899#issuecomment-317904001) for more information.

_assets/docs/discovery.md

@@ -26,7 +26,6 @@ from them nodes that are registered as a topic provider.
 
 We can control how often this loop wil run, more about it in the next section.
 
-
 Peer pool in status-go
 ----------------------
 
@@ -35,12 +34,15 @@ without using a lot of resources in the long run. It achieves it by introducing
 two modes of synchronization:
 
 1. Fast mode.
+
 Peer will run search loop quite often (every 500ms at the time of writing) with the
 goal to visit as much nodes as possible and once it will find minimum amount of
 peers with required capability it will swich to slow mode.
-2. Slow mode.
+
+1. Slow mode.
+
 This mode might be useful to get information about new peers that can be used
-later if initial set of peers will dissapear. Should run once in a 10m-30m.
+later if initial set of peers disappears. Should run once in a 10m-30m.
 
 However finding peers even with fast mode can take noticeable amount of time,
 which is fine if node is a long-running, but will be a huge problem on a mobile
@@ -48,5 +50,6 @@ device. To workaround such problem we will introduce a leveldb cache that will
 maintain a list of peers that was used by a device before it went offline.
 
 Another important detail of a peer pool is a support of min and max amount of peers:
+
 - min is required to switch from fast to slow sync mode
 - max is an upper limit that can be used by a single node

api/connection.go

@@ -21,12 +21,19 @@ type ConnectionState struct {
 // other types are also may be used.
 type ConnectionType byte
 
+const (
+	offline  = "offline"
+	wifi     = "wifi"
+	cellular = "cellular"
+	unknown  = "unknown"
+)
+
 // NewConnectionType creates new ConnectionType from string.
 func NewConnectionType(s string) ConnectionType {
 	switch s {
-	case "cellular":
+	case cellular:
 		return ConnectionCellular
-	case "wifi":
+	case wifi:
 		return ConnectionWifi
 	}
 
@@ -43,17 +50,17 @@ const (
 // String formats ConnectionState for logs. Implements Stringer.
 func (c ConnectionState) String() string {
 	if c.Offline {
-		return "offline"
+		return offline
 	}
 
 	var typ string
 	switch c.Type {
 	case ConnectionWifi:
-		typ = "wifi"
+		typ = wifi
 	case ConnectionCellular:
-		typ = "cellular"
+		typ = cellular
 	default:
-		typ = "unknown"
+		typ = unknown
 	}
 
 	if c.Expensive {

cmd/bootnode/main.go

@@ -37,13 +37,15 @@ func main() {
 		verbosity   = flag.Int("verbosity", int(log.LvlInfo), "log verbosity (0-9)")
 		vmodule     = flag.String("vmodule", "", "log verbosity pattern")
 		nursery     = bootnodes{}
+		nodeKey     *ecdsa.PrivateKey
+		err         error
 	)
 	flag.Var(&nursery, "n", "These nodes are used to connect to the network if the table is empty and there are no known nodes in the database.")
 	flag.Parse()
 
 	glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat(false)))
 	glogger.Verbosity(log.Lvl(*verbosity))
-	if err := glogger.Vmodule(*vmodule); err != nil {
+	if err = glogger.Vmodule(*vmodule); err != nil {
 		log.Crit("Failed to set glog verbosity", "value", *vmodule, "err", err)
 	}
 	log.Root().SetHandler(glogger)
@@ -51,10 +53,6 @@ func main() {
 	if len(*nodeKeyFile) == 0 && len(*keydata) == 0 {
 		log.Crit("either `nodekey` or `keydata` must be provided")
 	}
-	var (
-		nodeKey *ecdsa.PrivateKey
-		err     error
-	)
 	if len(*nodeKeyFile) != 0 {
 		nodeKey, err = crypto.LoadECDSA(*nodeKeyFile)
 		if err != nil {

cmd/statusd/debug/debug_test.go

@@ -14,12 +14,14 @@ import (
 	"github.com/status-im/status-go/api"
 	"github.com/status-im/status-go/cmd/statusd/debug"
 	"github.com/status-im/status-go/params"
-	"github.com/stretchr/testify/assert"
+	testifyAssert "github.com/stretchr/testify/assert"
 )
 
+const stopNodeCommandLine = "StopNode()"
+
 // TestInvalidExpressions tests invalid expressions.
 func TestInvalidExpressions(t *testing.T) {
-	assert := assert.New(t)
+	assert := testifyAssert.New(t)
 
 	startDebugging(assert)
 
@@ -54,7 +56,7 @@ func TestInvalidExpressions(t *testing.T) {
 
 // TestStartStopNode tests starting and stopping a node remotely.
 func TestStartStopNode(t *testing.T) {
-	assert := assert.New(t)
+	assert := testifyAssert.New(t)
 	configJSON, cleanup, err := mkConfigJSON("start-stop-node")
 	assert.NoError(err)
 	defer cleanup()
@@ -68,15 +70,14 @@ func TestStartStopNode(t *testing.T) {
 	assert.Len(replies, 1)
 	assert.Equal("[0] <nil>", replies[0])
 
-	commandLine = "StopNode()"
+	replies = sendCommandLine(assert, conn, stopNodeCommandLine)
-	replies = sendCommandLine(assert, conn, commandLine)
 	assert.Len(replies, 1)
 	assert.Equal("[0] <nil>", replies[0])
 }
 
 // TestCreateAccount tests creating an account on the server.
 func TestCreateAccount(t *testing.T) {
-	assert := assert.New(t)
+	assert := testifyAssert.New(t)
 	configJSON, cleanup, err := mkConfigJSON("create-account")
 	assert.NoError(err)
 	defer cleanup()
@@ -98,8 +99,7 @@ func TestCreateAccount(t *testing.T) {
 	assert.NotEqual("[2] <nil>", replies[2])
 	assert.Equal("[3] <nil>", replies[3])
 
-	commandLine = "StopNode()"
+	replies = sendCommandLine(assert, conn, stopNodeCommandLine)
-	replies = sendCommandLine(assert, conn, commandLine)
 	assert.Len(replies, 1)
 	assert.Equal("[0] <nil>", replies[0])
 }
@@ -107,7 +107,7 @@ func TestCreateAccount(t *testing.T) {
 // TestSelectAccountLogout tests selecting an account on the server
 // and logging out afterwards.
 func TestSelectAccountLogout(t *testing.T) {
-	assert := assert.New(t)
+	assert := testifyAssert.New(t)
 	configJSON, cleanup, err := mkConfigJSON("select-account")
 	assert.NoError(err)
 	defer cleanup()
@@ -141,8 +141,7 @@ func TestSelectAccountLogout(t *testing.T) {
 	assert.Len(replies, 1)
 	assert.Equal("[0] <nil>", replies[0])
 
-	commandLine = "StopNode()"
+	replies = sendCommandLine(assert, conn, stopNodeCommandLine)
-	replies = sendCommandLine(assert, conn, commandLine)
 	assert.Len(replies, 1)
 	assert.Equal("[0] <nil>", replies[0])
 }
@@ -157,7 +156,7 @@ var (
 )
 
 // startDebugging lazily creates or reuses a debug instance.
-func startDebugging(assert *assert.Assertions) {
+func startDebugging(assert *testifyAssert.Assertions) {
 	mu.Lock()
 	defer mu.Unlock()
 	if d == nil {
@@ -188,14 +187,15 @@ func mkConfigJSON(name string) (string, func(), error) {
 }
 
 // connectDebug connects to the debug instance.
-func connectDebug(assert *assert.Assertions) net.Conn {
+func connectDebug(assert *testifyAssert.Assertions) net.Conn {
 	conn, err := net.Dial("tcp", ":51515")
 	assert.NoError(err)
 	return conn
 }
 
 // sendCommandLine sends a command line via the passed connection.
-func sendCommandLine(assert *assert.Assertions, conn net.Conn, commandLine string) []string {
+// nolint: interfacer
+func sendCommandLine(assert *testifyAssert.Assertions, conn net.Conn, commandLine string) []string {
 	reader := bufio.NewReader(conn)
 	writer := bufio.NewWriter(conn)
 	_, err := writer.WriteString(commandLine + "\n")

cmd/statusd/flags_test.go

@@ -8,6 +8,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+// nolint: deadcode
 func TestStatusFlag(t *testing.T) {
 	service := "status"
 

cmd/statusd/main.go

@@ -156,8 +156,8 @@ func main() {
 		exitCode := syncAndStopNode(interruptCh, backend.StatusNode(), *syncAndExit)
 		// Call was interrupted. Wait for graceful shutdown.
 		if exitCode == -1 {
-			if node := backend.StatusNode().GethNode(); node != nil {
+			if gethNode := backend.StatusNode().GethNode(); gethNode != nil {
-				node.Wait()
+				gethNode.Wait()
 			}
 			return
 		}
@@ -165,10 +165,10 @@ func main() {
 		os.Exit(exitCode)
 	}
 
-	node := backend.StatusNode().GethNode()
+	gethNode := backend.StatusNode().GethNode()
-	if node != nil {
+	if gethNode != nil {
 		// wait till node has been stopped
-		node.Wait()
+		gethNode.Wait()
 	}
 }
 
@@ -183,8 +183,8 @@ func startDebug(backend *api.StatusBackend) error {
 func startCollectingNodeMetrics(interruptCh <-chan struct{}, statusNode *node.StatusNode) {
 	logger.Info("Starting collecting node metrics")
 
-	node := statusNode.GethNode()
+	gethNode := statusNode.GethNode()
-	if node == nil {
+	if gethNode == nil {
 		logger.Error("Failed to run metrics because it could not get the node")
 		return
 	}
@@ -192,7 +192,7 @@ func startCollectingNodeMetrics(interruptCh <-chan struct{}, statusNode *node.St
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	go func() {
-		if err := nodemetrics.SubscribeServerEvents(ctx, node); err != nil {
+		if err := nodemetrics.SubscribeServerEvents(ctx, gethNode); err != nil {
 			logger.Error("Failed to subscribe server events", "error", err)
 		}
 	}()

extkeys/hdkey.go

@@ -104,6 +104,7 @@ type ExtendedKey struct {
 	CachedPubKeyData []byte // (non-serialized) used for memoization of public key (calculated from a private key)
 }
 
+// nolint: gas
 const masterSecret = "Bitcoin seed"
 
 // NewMaster creates new master node, root of HD chain/tree.

extkeys/hdkey_test.go

@@ -12,6 +12,11 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 )
 
+const (
+	masterPrivKey1 = "xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi"
+	masterPrivKey2 = "xprv9s21ZrQH143K31xYSDQpPDxsXRTUcvj2iNHm5NUtrGiGG5e2DtALGdso3pGz6ssrdK4PFmM8NSpSBHNqPqm55Qn3LqFtT2emdEXVYsCzC2U"
+)
+
 func TestBIP32Vectors(t *testing.T) {
 	tests := []struct {
 		name    string
@@ -26,7 +31,7 @@ func TestBIP32Vectors(t *testing.T) {
 			"000102030405060708090a0b0c0d0e0f",
 			[]uint32{},
 			"xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8",
-			"xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi",
+			masterPrivKey1,
 		},
 		{
 			"test vector 1 chain m/0H",
@@ -69,7 +74,7 @@ func TestBIP32Vectors(t *testing.T) {
 			"fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542",
 			[]uint32{},
 			"xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB",
-			"xprv9s21ZrQH143K31xYSDQpPDxsXRTUcvj2iNHm5NUtrGiGG5e2DtALGdso3pGz6ssrdK4PFmM8NSpSBHNqPqm55Qn3LqFtT2emdEXVYsCzC2U",
+			masterPrivKey2,
 		},
 		{
 			"test vector 2 chain m/0",
@@ -176,8 +181,8 @@ func TestChildDerivation(t *testing.T) {
 	// derive public keys from private keys
 	getPrivateChildDerivationTests := func() []testCase {
 		// The private extended keys for test vectors in [BIP32].
-		testVec1MasterPrivKey := "xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi"
+		testVec1MasterPrivKey := masterPrivKey1
-		testVec2MasterPrivKey := "xprv9s21ZrQH143K31xYSDQpPDxsXRTUcvj2iNHm5NUtrGiGG5e2DtALGdso3pGz6ssrdK4PFmM8NSpSBHNqPqm55Qn3LqFtT2emdEXVYsCzC2U"
+		testVec2MasterPrivKey := masterPrivKey2
 
 		return []testCase{
 			// Test vector 1
@@ -185,7 +190,7 @@ func TestChildDerivation(t *testing.T) {
 				name:    "test vector 1 chain m",
 				master:  testVec1MasterPrivKey,
 				path:    []uint32{},
-				wantKey: "xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi",
+				wantKey: masterPrivKey1,
 			},
 			{
 				name:    "test vector 1 chain m/0",
@@ -223,7 +228,7 @@ func TestChildDerivation(t *testing.T) {
 				name:    "test vector 2 chain m",
 				master:  testVec2MasterPrivKey,
 				path:    []uint32{},
-				wantKey: "xprv9s21ZrQH143K31xYSDQpPDxsXRTUcvj2iNHm5NUtrGiGG5e2DtALGdso3pGz6ssrdK4PFmM8NSpSBHNqPqm55Qn3LqFtT2emdEXVYsCzC2U",
+				wantKey: masterPrivKey2,
 			},
 			{
 				name:    "test vector 2 chain m/0",
@@ -507,7 +512,7 @@ func TestErrors(t *testing.T) {
 }
 
 func TestBIP44ChildDerivation(t *testing.T) {
-	keyString := "xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi"
+	keyString := masterPrivKey1
 	derivedKey1String := "xprvA38t8tFW4vbuB7WJXEqMFmZqRrcZUKWqqMcGjjKjr2hbfvPhRtLLJGL4ayWG8shF1VkuUikVGodGshLiKRS7WrdsrGSVDQCY33qoPBxG2Kp"
 	derivedKey2String := "xprvA38t8tFW4vbuDgBNpekPnuMSfpWziDLdF7W9Zd3mPy6eDEkM5F17vk59RtVoFbNdBBq84EJf5CqdZhhEoBkAM4DXHQsDqvUxVnncfnDQEFg"
 

jail/cell.go

@@ -84,10 +84,10 @@ type Cell struct {
 // NewCell encapsulates what we need to create a new jailCell from the
 // provided vm and eventloop instance.
 func NewCell(id string) (*Cell, error) {
-	vm := vm.New()
+	newVM := vm.New()
-	lo := loop.New(vm)
+	lo := loop.New(newVM)
 
-	err := registerVMHandlers(vm, lo)
+	err := registerVMHandlers(newVM, lo)
 	if err != nil {
 		return nil, err
 	}
@@ -95,7 +95,7 @@ func NewCell(id string) (*Cell, error) {
 	ctx, cancel := context.WithCancel(context.Background())
 	loopStopped := make(chan struct{})
 	cell := Cell{
-		jsvm:        vm,
+		jsvm:        newVM,
 		id:          id,
 		cancel:      cancel,
 		loop:        lo,
@@ -180,8 +180,8 @@ func (c *Cell) Get(key string) (JSValue, error) {
 	if err != nil {
 		return JSValue{}, err
 	}
-	JSValue := JSValue{value: v}
+	value := JSValue{value: v}
-	return JSValue, nil
+	return value, nil
 }
 
 // GetObjectValue calls GetObjectValue on the underlying JavaScript VM and returns
@@ -191,8 +191,8 @@ func (c *Cell) GetObjectValue(v otto.Value, name string) (JSValue, error) {
 	if err != nil {
 		return JSValue{}, err
 	}
-	JSValue := JSValue{value: v}
+	value := JSValue{value: v}
-	return JSValue, nil
+	return value, nil
 }
 
 // Run calls Run on the underlying JavaScript VM and returns
@@ -202,8 +202,8 @@ func (c *Cell) Run(src interface{}) (JSValue, error) {
 	if err != nil {
 		return JSValue{}, err
 	}
-	JSValue := JSValue{value: v}
+	value := JSValue{value: v}
-	return JSValue, nil
+	return value, nil
 }
 
 // Call calls Call on the underlying JavaScript VM and returns
@@ -213,6 +213,6 @@ func (c *Cell) Call(item string, this interface{}, args ...interface{}) (JSValue
 	if err != nil {
 		return JSValue{}, err
 	}
-	JSValue := JSValue{value: v}
+	value := JSValue{value: v}
-	return JSValue, nil
+	return value, nil
 }

jail/internal/loop/loop_test.go

@@ -48,8 +48,8 @@ type LoopSuite struct {
 func (s *LoopSuite) SetupTest() {
 	s.task = &DummyTask{}
 
-	vm := vm.New()
+	newVM := vm.New()
-	s.loop = New(vm)
+	s.loop = New(newVM)
 
 	ctx, cancel := context.WithCancel(context.Background())
 	s.cancel = cancel

jail/jail.go

@@ -24,6 +24,7 @@ const (
 	// EmptyResponse is returned when cell is successfully created and initialized
 	// but no additional JS was provided to the initialization method.
 	EmptyResponse = `{"result": ""}`
+	undefinedText = "undefined"
 )
 
 var (
@@ -299,7 +300,7 @@ func newJailErrorResponse(err error) string {
 func formatOttoValue(result otto.Value) otto.Value {
 	val := result.String()
 	if result.IsString() {
-		if val != "undefined" {
+		if val != undefinedText {
 			val = fmt.Sprintf(`"%s"`, strings.Replace(val, `"`, `\"`, -1))
 			result, _ = otto.ToValue(val)
 		}
@@ -312,7 +313,7 @@ func formatOttoValue(result otto.Value) otto.Value {
 // that is a valid JavaScript code.
 func newJailResultResponse(value otto.Value) string {
 	res := value.String()
-	if res == "undefined" {
+	if res == undefinedText {
 		res = "null"
 	}
 	return `{"result":` + res + `}`

mailserver/mailserver.go

@@ -262,7 +262,7 @@ func (s *WMailServer) validateRequest(peerID []byte, request *whisper.Envelope)
 	f := whisper.Filter{KeySym: s.key}
 	decrypted := request.Open(&f)
 	if decrypted == nil {
-		log.Warn(fmt.Sprintf("Failed to decrypt p2p request"))
+		log.Warn("Failed to decrypt p2p request")
 		return false, 0, 0, nil
 	}
 

metrics/node/subscribe_test.go

@@ -9,25 +9,25 @@ import (
 )
 
 func TestSubscribeServerEventsWithoutServer(t *testing.T) {
-	node, err := node.New(&node.Config{})
+	gethNode, err := node.New(&node.Config{})
 	require.NoError(t, err)
-	require.EqualError(t, SubscribeServerEvents(context.TODO(), node), "server is unavailable")
+	require.EqualError(t, SubscribeServerEvents(context.TODO(), gethNode), "server is unavailable")
 }
 
 func TestSubscribeServerEvents(t *testing.T) {
-	node, err := node.New(&node.Config{})
+	gethNode, err := node.New(&node.Config{})
 	require.NoError(t, err)
-	err = node.Start()
+	err = gethNode.Start()
 	require.NoError(t, err)
 	defer func() {
-		err := node.Stop()
+		err := gethNode.Stop()
 		require.NoError(t, err)
 	}()
 
 	ctx, cancel := context.WithCancel(context.Background())
 	done := make(chan struct{})
 	go func() {
-		err := SubscribeServerEvents(ctx, node)
+		err := SubscribeServerEvents(ctx, gethNode)
 		require.NoError(t, err)
 		close(done)
 	}()

node/node.go

@@ -196,10 +196,10 @@ func activateShhService(stack *node.Node, config *params.NodeConfig, db *leveldb
 		return nil
 	}
 	if config.WhisperConfig.EnableNTPSync {
-		if err := stack.Register(func(*node.ServiceContext) (node.Service, error) {
+		if err = stack.Register(func(*node.ServiceContext) (node.Service, error) {
 			return timesource.Default(), nil
 		}); err != nil {
-			return err
+			return
 		}
 	}
 

notifications/push/fcm/notification_test.go

@@ -34,7 +34,7 @@ func (s *NotifierTestSuite) TestNotifySuccess() {
 	ids := []string{"1"}
 	payload := fcmPayload
 	msg := make(map[string]string)
-	body := "body"
+	body := "body1"
 	msg["msg"] = body
 
 	s.fcmClientMock.EXPECT().SetNotificationPayload(&fcmPayload).Times(1)
@@ -53,7 +53,7 @@ func (s *NotifierTestSuite) TestNotifyError() {
 	ids := []string{"1"}
 	payload := fcmPayload
 	msg := make(map[string]string)
-	body := "body"
+	body := "body2"
 	msg["msg"] = body
 
 	s.fcmClientMock.EXPECT().SetNotificationPayload(&fcmPayload).Times(1)

rpc/call_raw.go

@@ -57,7 +57,7 @@ type jsonError struct {
 }
 
 // callRawContext performs a JSON-RPC call with already crafted JSON-RPC body and
-// given context. It returns string in JSON format with response (successul or error).
+// given context. It returns string in JSON format with response (successful or error).
 //
 // TODO(divan): this function exists for compatibility and uses default
 // go-ethereum's RPC client under the hood. It adds some unnecessary overhead

services/shhext/dedup/cache_test.go

@@ -35,9 +35,11 @@ func (s *DedupCacheTestSuite) TearDownTest() {
 }
 
 func (s *DedupCacheTestSuite) TestMultipleFilterIDs() {
-	filterID1 := "filter-id1"
+	const (
-	filterID2 := "filter-id2"
+		filterID1 = "filter-id1"
-	filterID3 := "filter-id"
+		filterID2 = "filter-id2"
+		filterID3 = "filter-id"
+	)
 	messagesFilter1 := generateMessages(10)
 	s.NoError(s.c.Put(filterID1, messagesFilter1))
 
@@ -74,7 +76,7 @@ func (s *DedupCacheTestSuite) TestMultipleFilterIDs() {
 }
 
 func (s *DedupCacheTestSuite) TestCleaningUp() {
-	filterID := "filter-id"
+	const filterID = "filter1-id"
 	// - 2 days
 	s.c.now = func() time.Time { return time.Now().Add(-48 * time.Hour) }
 	messages2DaysOld := generateMessages(10)

t/benchmarks/messages_test.go

@@ -2,8 +2,8 @@ package benchmarks
 
 import (
 	"context"
+	"crypto/rand"
 	"fmt"
-	"math/rand"
 	"testing"
 
 	"github.com/ethereum/go-ethereum/node"
@@ -43,7 +43,7 @@ func TestSendMessages(t *testing.T) {
 	require.NoError(t, err)
 
 	payload := make([]byte, *msgSize)
-	rand.Read(payload)
+	_, _ = rand.Read(payload)
 
 	envelopeEvents := make(chan whisper.EnvelopeEvent, 100)
 	sub := shhService.SubscribeEnvelopeEvents(envelopeEvents)

t/e2e/accounts/accounts_test.go

@@ -46,7 +46,7 @@ func (s *AccountsTestSuite) TestAccountsList() {
 	accounts, err = s.Backend.AccountManager().Accounts()
 	s.NoError(err)
 	s.Equal(1, len(accounts), "exactly single account is expected (main account)")
-	s.Equal(string(accounts[0].Hex()), address,
+	s.Equal(accounts[0].Hex(), address,
 		fmt.Sprintf("main account is not retured as the first key: got %s, expected %s", accounts[0].Hex(), "0x"+address))
 
 	// create sub-account 1
@@ -57,8 +57,8 @@ func (s *AccountsTestSuite) TestAccountsList() {
 	accounts, err = s.Backend.AccountManager().Accounts()
 	s.NoError(err)
 	s.Equal(2, len(accounts), "exactly 2 accounts are expected (main + sub-account 1)")
-	s.Equal(string(accounts[0].Hex()), address, "main account is not retured as the first key")
+	s.Equal(accounts[0].Hex(), address, "main account is not retured as the first key")
-	s.Equal(string(accounts[1].Hex()), subAccount1, "subAcount1 not returned")
+	s.Equal(accounts[1].Hex(), subAccount1, "subAcount1 not returned")
 
 	// create sub-account 2, index automatically progresses
 	subAccount2, subPubKey2, err := s.Backend.AccountManager().CreateChildAccount("", TestConfig.Account1.Password)
@@ -69,14 +69,14 @@ func (s *AccountsTestSuite) TestAccountsList() {
 	accounts, err = s.Backend.AccountManager().Accounts()
 	s.NoError(err)
 	s.Equal(3, len(accounts), "unexpected number of accounts")
-	s.Equal(string(accounts[0].Hex()), address, "main account is not retured as the first key")
+	s.Equal(accounts[0].Hex(), address, "main account is not retured as the first key")
 
-	subAccount1MatchesKey1 := string(accounts[1].Hex()) != "0x"+subAccount1
+	subAccount1MatchesKey1 := accounts[1].Hex() != "0x"+subAccount1
-	subAccount1MatchesKey2 := string(accounts[2].Hex()) != "0x"+subAccount1
+	subAccount1MatchesKey2 := accounts[2].Hex() != "0x"+subAccount1
 	s.False(!subAccount1MatchesKey1 && !subAccount1MatchesKey2, "subAcount1 not returned")
 
-	subAccount2MatchesKey1 := string(accounts[1].Hex()) != "0x"+subAccount2
+	subAccount2MatchesKey1 := accounts[1].Hex() != "0x"+subAccount2
-	subAccount2MatchesKey2 := string(accounts[2].Hex()) != "0x"+subAccount2
+	subAccount2MatchesKey2 := accounts[2].Hex() != "0x"+subAccount2
 	s.False(!subAccount2MatchesKey1 && !subAccount2MatchesKey2, "subAcount2 not returned")
 }
 

t/e2e/api/api_test.go

@@ -119,7 +119,7 @@ func (s *APITestSuite) TestRaceConditions() {
 	}
 
 	for range progress {
-		cnt -= 1
+		cnt--
 		if cnt <= 0 {
 			break
 		}
@@ -134,7 +134,7 @@ func (s *APITestSuite) TestCellsRemovedAfterSwitchAccount() {
 	const itersCount = 5
 	var (
 		require   = s.Require()
-		getChatId = func(id int) string {
+		getChatID = func(id int) string {
 			return testChatID + strconv.Itoa(id)
 		}
 	)
@@ -155,7 +155,7 @@ func (s *APITestSuite) TestCellsRemovedAfterSwitchAccount() {
 	require.NoError(err)
 
 	for i := 0; i < itersCount; i++ {
-		_, e := s.api.JailManager().CreateCell(getChatId(i))
+		_, e := s.api.JailManager().CreateCell(getChatID(i))
 		require.NoError(e)
 	}
 
@@ -163,7 +163,7 @@ func (s *APITestSuite) TestCellsRemovedAfterSwitchAccount() {
 	require.NoError(err)
 
 	for i := 0; i < itersCount; i++ {
-		_, e := s.api.JailManager().Cell(getChatId(i))
+		_, e := s.api.JailManager().Cell(getChatID(i))
 		require.Error(e)
 	}
 }

t/e2e/jail/jail_test.go

@@ -19,7 +19,8 @@ import (
 )
 
 const (
-	testChatID = "testChat"
+	testChatID  = "testChat"
+	successJSON = `{"result":true}`
 )
 
 var (
@@ -98,7 +99,6 @@ func (s *JailTestSuite) TestCreateAndInitCell() {
 	// Reinitialization preserves the JS environment, so the 'test' variable exists
 	// even though we didn't initialize it here (in the second room).
 	response = s.Jail.CreateAndInitCell("newChat2", "a")
-	expectedResponse = `{"result":2}`
 	s.Equal(expectedResponse, response)
 
 	// But this variable doesn't leak into other rooms.
@@ -121,8 +121,8 @@ func (s *JailTestSuite) TestFunctionCall() {
 	s.Equal(expectedError, response)
 
 	// call extraFunc()
-	response = s.Jail.Call(testChatID, `["commands", "testCommand"]`, `{"val":12}`)
+	response = s.Jail.Call(testChatID, `["commands", "testCommand"]`, `{"val":11}`)
-	expectedResponse := `{"result":144}`
+	expectedResponse := `{"result":121}`
 	s.Equal(expectedResponse, response)
 }
 
@@ -136,7 +136,7 @@ func (s *JailTestSuite) TestFunctionCallTrue() {
 
 	// call extraFunc()
 	response := s.Jail.Call(testChatID, `["commands", "testCommandTrue"]`, `{"val":12}`)
-	expectedResponse := `{"result":true}`
+	expectedResponse := successJSON
 	s.Equal(expectedResponse, response)
 }
 
@@ -194,7 +194,7 @@ func (s *JailTestSuite) TestEventSignal() {
 	response, err := responseValue.Value().ToString()
 	s.NoError(err, "cannot parse result")
 
-	expectedResponse := `{"result":true}`
+	expectedResponse := successJSON
 	s.Equal(expectedResponse, response)
 }
 
@@ -234,7 +234,7 @@ func (s *JailTestSuite) TestSendSyncResponseOrder() {
 		go func(i int) {
 			defer wg.Done()
 			res := s.Jail.Call(testChatID, `["commands", "testCommand"]`, fmt.Sprintf(`{"val":%d}`, i))
-			if !strings.Contains(string(res), fmt.Sprintf("result\":%d", i*i)) {
+			if !strings.Contains(res, fmt.Sprintf("result\":%d", i*i)) {
 				errCh <- fmt.Errorf("result should be '%d', got %s", i*i, res)
 			}
 		}(i)
@@ -243,7 +243,7 @@ func (s *JailTestSuite) TestSendSyncResponseOrder() {
 		go func(i int) {
 			defer wg.Done()
 			res := s.Jail.Call(testChatID, `["commands", "calculateGasPrice"]`, fmt.Sprintf(`%d`, i))
-			if strings.Contains(string(res), "error") {
+			if strings.Contains(res, "error") {
 				errCh <- fmt.Errorf("result should not contain 'error', got %s", res)
 			}
 		}(i)

t/e2e/transactions/transactions_test.go

@@ -24,6 +24,8 @@ import (
 	"github.com/stretchr/testify/suite"
 )
 
+const invalidTxID = "invalid-tx-id"
+
 type initFunc func([]byte, *transactions.SendTxArgs)
 
 func txURLString(result sign.Result) string {
@@ -64,7 +66,7 @@ func (s *TransactionsTestSuite) TestCallRPCSendTransaction() {
 			s.Equal(params.SendTransactionMethodName, method)
 
 			txID := event["id"].(string)
-			signResult = s.Backend.ApproveSignRequest(string(txID), TestConfig.Account1.Password)
+			signResult = s.Backend.ApproveSignRequest(txID, TestConfig.Account1.Password)
 			s.NoError(signResult.Error, "cannot complete queued transaction %s", txID)
 			close(transactionCompleted)
 		}
@@ -115,11 +117,11 @@ func (s *TransactionsTestSuite) TestCallRPCSendTransactionUpstream() {
 			txID := event["id"].(string)
 
 			// Complete with a wrong passphrase.
-			signResult = s.Backend.ApproveSignRequest(string(txID), "some-invalid-passphrase")
+			signResult = s.Backend.ApproveSignRequest(txID, "some-invalid-passphrase")
 			s.EqualError(signResult.Error, keystore.ErrDecrypt.Error(), "should return an error as the passphrase was invalid")
 
 			// Complete with a correct passphrase.
-			signResult = s.Backend.ApproveSignRequest(string(txID), TestConfig.Account2.Password)
+			signResult = s.Backend.ApproveSignRequest(txID, TestConfig.Account2.Password)
 			s.NoError(signResult.Error, "cannot complete queued transaction %s", txID)
 
 			close(transactionCompleted)
@@ -257,7 +259,7 @@ func (s *TransactionsTestSuite) setDefaultNodeNotificationHandler(signRequestRes
 			// the first call will fail (we are not logged in, but trying to complete tx)
 			log.Info("trying to complete with no user logged in")
 			err = s.Backend.ApproveSignRequest(
-				string(event["id"].(string)),
+				event["id"].(string),
 				TestConfig.Account1.Password,
 			).Error
 			s.EqualError(
@@ -271,7 +273,7 @@ func (s *TransactionsTestSuite) setDefaultNodeNotificationHandler(signRequestRes
 			err = s.Backend.SelectAccount(sampleAddress, TestConfig.Account1.Password)
 			s.NoError(err)
 			err = s.Backend.ApproveSignRequest(
-				string(event["id"].(string)),
+				event["id"].(string),
 				TestConfig.Account1.Password,
 			).Error
 			s.EqualError(
@@ -284,7 +286,7 @@ func (s *TransactionsTestSuite) setDefaultNodeNotificationHandler(signRequestRes
 			log.Info("trying to complete with correct user, this should succeed")
 			s.NoError(s.Backend.SelectAccount(TestConfig.Account1.Address, TestConfig.Account1.Password))
 			result := s.Backend.ApproveSignRequest(
-				string(event["id"].(string)),
+				event["id"].(string),
 				TestConfig.Account1.Password,
 			)
 			if expectedError != nil {
@@ -413,7 +415,7 @@ func (s *TransactionsTestSuite) TestSendEtherTxUpstream() {
 			log.Info("transaction queued (will be completed shortly)", "id", event["id"].(string))
 
 			signResult := s.Backend.ApproveSignRequest(
-				string(event["id"].(string)),
+				event["id"].(string),
 				TestConfig.Account1.Password,
 			)
 			s.NoError(signResult.Error, "cannot complete queued transaction[%v]", event["id"])
@@ -467,7 +469,7 @@ func (s *TransactionsTestSuite) TestDoubleCompleteQueuedTransactions() {
 
 		if envelope.Type == signal.EventSignRequestAdded {
 			event := envelope.Event.(map[string]interface{})
-			txID := string(event["id"].(string))
+			txID := event["id"].(string)
 			log.Info("transaction queued (will be failed and completed on the second call)", "id", txID)
 
 			// try with wrong password
@@ -545,7 +547,7 @@ func (s *TransactionsTestSuite) TestDiscardQueuedTransaction() {
 
 		if envelope.Type == signal.EventSignRequestAdded {
 			event := envelope.Event.(map[string]interface{})
-			txID := string(event["id"].(string))
+			txID := event["id"].(string)
 			log.Info("transaction queued (will be discarded soon)", "id", txID)
 
 			s.True(s.Backend.PendingSignRequests().Has(txID), "txqueue should still have test tx")
@@ -635,7 +637,7 @@ func (s *TransactionsTestSuite) TestDiscardMultipleQueuedTransactions() {
 		s.NoError(err)
 		if envelope.Type == signal.EventSignRequestAdded {
 			event := envelope.Event.(map[string]interface{})
-			txID := string(event["id"].(string))
+			txID := event["id"].(string)
 			log.Info("transaction queued (will be discarded soon)", "id", txID)
 
 			s.True(s.Backend.PendingSignRequests().Has(txID),
@@ -678,12 +680,12 @@ func (s *TransactionsTestSuite) TestDiscardMultipleQueuedTransactions() {
 
 	// wait for transactions, and discard immediately
 	discardTxs := func(txIDs []string) {
-		txIDs = append(txIDs, "invalid-tx-id")
+		txIDs = append(txIDs, invalidTxID)
 
 		// discard
 		discardResults := s.Backend.DiscardSignRequests(txIDs)
 		require.Len(discardResults, 1, "cannot discard txs: %v", discardResults)
-		require.Error(discardResults["invalid-tx-id"], sign.ErrSignReqNotFound, "cannot discard txs: %v", discardResults)
+		require.Error(discardResults[invalidTxID], sign.ErrSignReqNotFound, "cannot discard txs: %v", discardResults)
 
 		// try completing discarded transaction
 		completeResults := s.Backend.ApproveSignRequests(txIDs, TestConfig.Account1.Password)
@@ -787,7 +789,7 @@ func (s *TransactionsTestSuite) sendConcurrentTransactions(testTxCount int) {
 
 		if envelope.Type == signal.EventSignRequestAdded {
 			event := envelope.Event.(map[string]interface{})
-			txID := string(event["id"].(string))
+			txID := event["id"].(string)
 			log.Info("transaction queued (will be completed in a single call, once aggregated)", "id", txID)
 
 			txIDs <- txID
@@ -807,18 +809,18 @@ func (s *TransactionsTestSuite) sendConcurrentTransactions(testTxCount int) {
 
 	// wait for transactions, and complete them in a single call
 	completeTxs := func(txIDs []string) {
-		txIDs = append(txIDs, "invalid-tx-id")
+		txIDs = append(txIDs, invalidTxID)
 		results := s.Backend.ApproveSignRequests(txIDs, TestConfig.Account1.Password)
 		s.Len(results, testTxCount+1)
-		s.EqualError(results["invalid-tx-id"].Error, sign.ErrSignReqNotFound.Error())
+		s.EqualError(results[invalidTxID].Error, sign.ErrSignReqNotFound.Error())
 
 		for txID, txResult := range results {
 			s.False(
-				txResult.Error != nil && txID != "invalid-tx-id",
+				txResult.Error != nil && txID != invalidTxID,
 				"invalid error for %s", txID,
 			)
 			s.False(
-				len(txResult.Response.Bytes()) < 1 && txID != "invalid-tx-id",
+				len(txResult.Response.Bytes()) < 1 && txID != invalidTxID,
 				"invalid hash (expected non empty hash): %s", txID,
 			)
 			log.Info("transaction complete", "URL", txURLString(txResult))

t/e2e/whisper/whisper_ext_test.go

@@ -92,7 +92,7 @@ func (s *WhisperExtensionSuite) TestExpiredSignal() {
 			Type  string
 			Event json.RawMessage
 		}
-		fmt.Println(string(rawSignal))
+		fmt.Println(rawSignal)
 		s.NoError(json.Unmarshal([]byte(rawSignal), &sg))
 
 		if sg.Type == signal.EventEnvelopeExpired {

t/e2e/whisper/whisper_mailbox_test.go

@@ -19,6 +19,8 @@ import (
 	"github.com/stretchr/testify/suite"
 )
 
+const mailboxPassword = "status-offline-inbox"
+
 type WhisperMailboxSuite struct {
 	suite.Suite
 }
@@ -60,7 +62,7 @@ func (s *WhisperMailboxSuite) TestRequestMessageFromMailboxAsync() {
 	s.Require().NoError(err)
 
 	// Generate mailbox symkey.
-	password := "status-offline-inbox"
+	password := mailboxPassword
 	MailServerKeyID, err := senderWhisperService.AddSymKeyFromPassword(password)
 	s.Require().NoError(err)
 
@@ -168,7 +170,7 @@ func (s *WhisperMailboxSuite) TestRequestMessagesInGroupChat() {
 	charlieRPCClient := charlieBackend.StatusNode().RPCClient()
 
 	// Bob and charlie add the mailserver key.
-	password := "status-offline-inbox"
+	password := mailboxPassword
 	bobMailServerKeyID, err := bobWhisperService.AddSymKeyFromPassword(password)
 	s.Require().NoError(err)
 	charlieMailServerKeyID, err := charlieWhisperService.AddSymKeyFromPassword(password)

transactions/transactor.go

@@ -104,7 +104,7 @@ func (t *Transactor) validateAccount(args SendTxArgs, selectedAccount *account.S
 }
 
 func (t *Transactor) validateAndPropagate(selectedAccount *account.SelectedExtKey, args SendTxArgs) (hash gethcommon.Hash, err error) {
-	if err := t.validateAccount(args, selectedAccount); err != nil {
+	if err = t.validateAccount(args, selectedAccount); err != nil {
 		return hash, err
 	}
 	if !args.Valid() {

transactions/transactor_test.go

@@ -114,7 +114,7 @@ func (s *TxQueueTestSuite) setupTransactionPoolAPI(args SendTxArgs, returnNonce,
 func (s *TxQueueTestSuite) rlpEncodeTx(args SendTxArgs, config *params.NodeConfig, account *account.SelectedExtKey, nonce *hexutil.Uint64, gas hexutil.Uint64, gasPrice *big.Int) hexutil.Bytes {
 	newTx := types.NewTransaction(
 		uint64(*nonce),
-		gethcommon.Address(*args.To),
+		*args.To,
 		args.Value.ToInt(),
 		uint64(gas),
 		gasPrice,