Update golangci-lint config and fix linting issues (#168)

* update golangci

* update golang lint yml and updated linting issues

.golangci.yml

@@ -1,239 +1,42 @@
-# Source: https://github.com/golangci/golangci-lint/blob/master/.golangci.example.yml
-# options for analysis running
+# This file configures github.com/golangci/golangci-lint.
+
 run:
-  # default concurrency is a available CPU number
-  concurrency: 4
-
-  # timeout for analysis, e.g. 30s, 5m, default is 1m
-  deadline: 1m
-
-  # exit code when at least one issue was found, default is 1
-  issues-exit-code: 1
-
-  # include test files or not, default is true
+  timeout: 2m
   tests: true
-
-  # list of build tags, all linters use it. Default is empty list.
-  #build-tags:
-
-  # which dirs to skip: they won't be analyzed;
-  # can use regexp here: generated.*, regexp is applied on full path;
-  # default value is empty list, but next dirs are always skipped independently
-  # from this option's value:
-  #   	vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
-  #skip-dirs:
-
-  # which files to skip: they will be analyzed, but issues from them
-  # won't be reported. Default value is empty list, but there is
-  # no need to include all autogenerated files, we confidently recognize
-  # autogenerated files. If it's not please let us know.
-  #skip-files:
-
-  # by default isn't set. If set we pass it to "go list -mod={option}". From "go help modules":
-  # If invoked with -mod=readonly, the go command is disallowed from the implicit
-  # automatic updating of go.mod described above. Instead, it fails when any changes
-  # to go.mod are needed. This setting is most useful to check that go.mod does
-  # not need updates, such as in a continuous integration and testing system.
-  # If invoked with -mod=vendor, the go command assumes that the vendor
-  # directory holds the correct copies of dependencies and ignores
-  # the dependency descriptions in go.mod.
-  #modules-download-mode: (release|readonly|vendor)
-
-
-# output configuration options
-output:
-  # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
-  format: colored-line-number
-
-  # print lines of code with issue, default is true
-  print-issued-lines: true
-
-  # print linter name in the end of issue text, default is true
-  print-linter-name: true
-
-
-# all available settings of specific linters
-linters-settings:
-  errcheck:
-    # report about not checking of errors in type assetions: `a := b.(MyStruct)`;
-    # default is false: such cases aren't reported by default.
-    check-type-assertions: false
-
-    # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`;
-    # default is false: such cases aren't reported by default.
-    check-blank: false
-
-    # [deprecated] comma-separated list of pairs of the form pkg:regex
-    # the regex is used to ignore names within pkg. (default "fmt:.*").
-    # see https://github.com/kisielk/errcheck#the-deprecated-method for details
-    ignore: fmt:.*,io/ioutil:^Read.*
-
-    # path to a file containing a list of functions to exclude from checking
-    # see https://github.com/kisielk/errcheck#excluding-functions for details
-    #exclude: /path/to/file.txt
-  govet:
-    # report about shadowed variables
-    check-shadowing: false
-
-    # settings per analyzer
-    settings:
-      printf: # analyzer name, run `go tool vet help` to see all analyzers
-        funcs: # run `go tool vet help printf` to see available settings for `printf` analyzer
-          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Infof
-          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Warnf
-          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Errorf
-          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Fatalf
-  golint:
-    # minimal confidence for issues, default is 0.8
-    min-confidence: 0.8
-  gofmt:
-    # simplify code: gofmt with `-s` option, true by default
-    simplify: true
-  goimports:
-  # put imports beginning with prefix after 3rd-party packages;
-  # it's a comma-separated list of prefixes
-  #local-prefixes: github.com/org/project
-  gocyclo:
-    # minimal code complexity to report, 30 by default (but we recommend 10-20)
-    min-complexity: 10
-  maligned:
-    # print struct with more effective memory layout or not, false by default
-    suggest-new: true
-  dupl:
-    # tokens count to trigger issue, 150 by default
-    threshold: 100
-  goconst:
-    # minimal length of string constant, 3 by default
-    min-len: 3
-    # minimal occurrences count to trigger, 3 by default
-    min-occurrences: 3
-  depguard:
-    list-type: blacklist
-    include-go-root: false
-    packages:
-      - github.com/davecgh/go-spew/spew
-  misspell:
-    # Correct spellings using locale preferences for US or UK.
-    # Default is to use a neutral variety of English.
-    # Setting locale to US will correct the British spelling of 'colour' to 'color'.
-    locale: US
-    ignore-words:
-      - gossamer
-  lll:
-    # max line length, lines longer will be reported. Default is 120.
-    # '\t' is counted as 1 character by default, and can be changed with the tab-width option
-    line-length: 120
-    # tab width in spaces. Default to 1.
-    tab-width: 1
-  unused:
-    # treat code as a program (not a library) and report unused exported identifiers; default is false.
-    # XXX: if you enable this setting, unused will report a lot of false-positives in text editors:
-    # if it's called for subdir of a project it can't find funcs usages. All text editor integrations
-    # with golangci-lint call it on a directory with the changed file.
-    check-exported: false
-  unparam:
-    # Inspect exported functions, default is false. Set to true if no external program/library imports your code.
-    # XXX: if you enable this setting, unparam will report a lot of false-positives in text editors:
-    # if it's called for subdir of a project it can't find external interfaces. All text editor integrations
-    # with golangci-lint call it on a directory with the changed file.
-    check-exported: false
-  nakedret:
-    # make an issue if func has more lines of code than this setting and it has naked returns; default is 30
-    max-func-lines: 30
-  prealloc:
-    # XXX: we don't recommend using this linter before doing performance profiling.
-    # For most programs usage of prealloc will be a premature optimization.
-
-    # Report preallocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
-    # True by default.
-    simple: true
-    range-loops: true # Report preallocation suggestions on range loops, true by default
-    for-loops: false # Report preallocation suggestions on for loops, false by default
-  gocritic:
-    # Which checks should be disabled; can't be combined with 'enabled-checks'; default is empty
-    disabled-checks:
-      - regexpMust
-
-    # Enable multiple checks by tags, run `GL_DEBUG=gocritic golangci-lint` run to see all tags and checks.
-    # Empty list by default. See https://github.com/go-critic/go-critic#usage -> section "Tags".
-    enabled-tags:
-      - performance
-
-    settings: # settings passed to gocritic
-      captLocal: # must be valid enabled check name
-        paramsOnly: true
-      rangeValCopy:
-        sizeThreshold: 32
+  skip-dirs-use-default: true
 
 linters:
   enable:
-    - govet
-    - megacheck
+    - bodyclose
+    - deadcode
+    - depguard
+    - dogsled
+    - errcheck
+    - goconst
+    - gocyclo
     - gofmt
     - goimports
-  enable-all: false
-  disable:
-    - maligned
-    - prealloc
-    - unparam
-  disable-all: false
-  presets:
-    - bugs
+    - golint
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - interfacer
+    - misspell
+    - scopelint
+    - staticcheck
+    - structcheck
+    - stylecheck
+    - typecheck
+    - unconvert
     - unused
-  fast: false
-
+    - varcheck
 
 issues:
-  # List of regexps of issue texts to exclude, empty list by default.
-  # But independently from this option we use default exclude patterns,
-  # it can be disabled by `exclude-use-default: false`. To list all
-  # excluded by default patterns execute `golangci-lint run --help`
-  #exclude:
-
-  # Excluding configuration per-path, per-linter, per-text and per-source
   exclude-rules:
-    # Exclude some linters from running on tests files.
-    - path: _test\.go
+    - text: "comment on exported var"
       linters:
-        - gocyclo
-        - errcheck
-        - dupl
-        - gosec
-
-    # Exclude known linters from partially hard-vendored code,
-    # which is impossible to exclude via "nolint" comments.
-    - path: internal/hmac/
-      text: "weak cryptographic primitive"
+        - golint
+    - text: "ST1005:"
       linters:
-        - gosec
-
-    # Exclude some staticcheck messages
-    - linters:
-        - staticcheck
-      text: "SA9003:"
-
-    # Exclude lll issues for long lines with go:generate
-    - linters:
-        - lll
-      source: "^//go:generate "
-      text: "long-lines"
-
-  # Independently from option `exclude` we use default exclude patterns,
-  # it can be disabled by this option. To list all
-  # excluded by default patterns execute `golangci-lint run --help`.
-  # Default value for this option is true.
-  exclude-use-default: false
-
-  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
-  max-per-linter: 0
-
-  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
-  max-same-issues: 0
-
-  # Show only new issues: if there are unstaged changes or untracked files,
-  # only those changes are analyzed, else only changes in HEAD~ are analyzed.
-  # It's a super-useful option for integration of golangci-lint into existing
-  # large codebase. It's not practical to fix all existing issues at the moment
-  # of integration: much better don't allow issues in new code.
-  # Default is false.
-  new: false
+        - stylecheck

client/genaccounts/main.go

@@ -33,7 +33,6 @@ const (
 func AddGenesisAccountCmd(
 	ctx *server.Context, cdc *codec.Codec, defaultNodeHome, defaultClientHome string,
 ) *cobra.Command {
-
 	cmd := &cobra.Command{
 		Use:   "add-genesis-account [address_or_key_name] [coin][,[coin]]",
 		Short: "Add a genesis account to genesis.json",

cmd/emintcli/keys.go

@@ -51,7 +51,7 @@ func keyCommands() *cobra.Command {
 	return cmd
 }
 
-func getKeybase(cmd *cobra.Command, dryrun bool, buf io.Reader) (keys.Keybase, error) {
+func getKeybase(dryrun bool, buf io.Reader) (keys.Keybase, error) {
 	if dryrun {
 		return keys.NewInMemory(keys.WithKeygenFunc(ethermintKeygenFunc)), nil
 	}
@@ -61,7 +61,7 @@ func getKeybase(cmd *cobra.Command, dryrun bool, buf io.Reader) (keys.Keybase, e
 
 func runAddCmd(cmd *cobra.Command, args []string) error {
 	inBuf := bufio.NewReader(cmd.InOrStdin())
-	kb, err := getKeybase(cmd, viper.GetBool(flagDryRun), inBuf)
+	kb, err := getKeybase(viper.GetBool(flagDryRun), inBuf)
 	if err != nil {
 		return err
 	}

crypto/keys/mintkey/mintkey.go

@@ -23,7 +23,8 @@ const (
 	blockTypePubKey  = "ETHERMINT PUBLIC KEY"
 )
 
-// Make bcrypt security parameter var, so it can be changed within the lcd test
+// BcryptSecurityParameter is the security parameter var,
+// so it can be changed within the lcd test
 // Making the bcrypt security parameter a var shouldn't be a security issue:
 // One can't verify an invalid key by maliciously changing the bcrypt
 // parameter during a runtime vulnerability. The main security

importer/importer_test.go

@@ -235,7 +235,7 @@ func TestImportBlocks(t *testing.T) {
 		ctx := sdk.NewContext(ms, abci.Header{}, false, logger)
 		ctx = ctx.WithBlockHeight(int64(block.NumberU64()))
 
-		stateDB := createStateDB(t, ctx, ak)
+		stateDB := createStateDB(ctx, ak)
 
 		if chainConfig.DAOForkSupport && chainConfig.DAOForkBlock != nil && chainConfig.DAOForkBlock.Cmp(block.Number()) == 0 {
 			applyDAOHardFork(stateDB)
@@ -268,7 +268,7 @@ func TestImportBlocks(t *testing.T) {
 	}
 }
 
-func createStateDB(t *testing.T, ctx sdk.Context, ak auth.AccountKeeper) *evmtypes.CommitStateDB {
+func createStateDB(ctx sdk.Context, ak auth.AccountKeeper) *evmtypes.CommitStateDB {
 	stateDB := evmtypes.NewCommitStateDB(ctx, ak, storageKey, codeKey)
 	return stateDB
 }

rpc/eth_api.go

@@ -279,7 +279,7 @@ func (e *PublicEthAPI) SendTransaction(args params.SendTxArgs) (common.Hash, err
 	intChainID, ok := new(big.Int).SetString(chainID, 10)
 	if !ok {
 		return common.Hash{}, fmt.Errorf(
-			fmt.Sprintf("Invalid chainID: %s, must be integer format", chainID))
+			fmt.Sprintf("invalid chainID: %s, must be integer format", chainID))
 	}
 
 	// Sign transaction
@@ -592,7 +592,7 @@ func bytesToEthTx(cliCtx context.CLIContext, bz []byte) (*types.EthereumTxMsg, e
 	err := cliCtx.Codec.UnmarshalBinaryLengthPrefixed(bz, &stdTx)
 	ethTx, ok := stdTx.(*types.EthereumTxMsg)
 	if !ok || err != nil {
-		return nil, fmt.Errorf("Invalid transaction type, must be an amino encoded Ethereum transaction")
+		return nil, fmt.Errorf("invalid transaction type, must be an amino encoded Ethereum transaction")
 	}
 	return ethTx, nil
 }

rpc/filter_api.go

@@ -39,23 +39,22 @@ func (e *PublicFilterAPI) GetLogs(criteria filters.FilterCriteria) ([]*ethtypes.
 		results := e.getLogs()
 		logs := filterLogs(results, nil, nil, filter.addresses, filter.topics)
 		return logs, nil
-	} else {
-		// Convert the RPC block numbers into internal representations
-		begin := rpc.LatestBlockNumber.Int64()
-		if criteria.FromBlock != nil {
-			begin = criteria.FromBlock.Int64()
-		}
-		from := big.NewInt(begin)
-		end := rpc.LatestBlockNumber.Int64()
-		if criteria.ToBlock != nil {
-			end = criteria.ToBlock.Int64()
-		}
-		to := big.NewInt(end)
-		results := e.getLogs()
-		logs := filterLogs(results, from, to, criteria.Addresses, criteria.Topics)
-
-		return returnLogs(logs), nil
 	}
+	// Convert the RPC block numbers into internal representations
+	begin := rpc.LatestBlockNumber.Int64()
+	if criteria.FromBlock != nil {
+		begin = criteria.FromBlock.Int64()
+	}
+	from := big.NewInt(begin)
+	end := rpc.LatestBlockNumber.Int64()
+	if criteria.ToBlock != nil {
+		end = criteria.ToBlock.Int64()
+	}
+	to := big.NewInt(end)
+	results := e.getLogs()
+	logs := filterLogs(results, from, to, criteria.Addresses, criteria.Topics)
+
+	return returnLogs(logs), nil
 }
 
 func (e *PublicFilterAPI) getLogs() (results []*ethtypes.Log) {

rpc/tester/tester_test.go

@@ -63,6 +63,7 @@ func call(method string, params []string) (*Response, error) {
 		return nil, err
 	}
 
+	/* #nosec */
 	res, err := http.Post(addr, "application/json", bytes.NewBuffer(req))
 	if err != nil {
 		return nil, err
@@ -122,7 +123,6 @@ func TestEth_blockNumber(t *testing.T) {
 	}
 
 	t.Logf("Got block number: %s\n", res.String())
-
 }
 
 func TestEth_GetBalance(t *testing.T) {
@@ -144,7 +144,6 @@ func TestEth_GetBalance(t *testing.T) {
 	if res.ToInt().Cmp(big.NewInt(0)) != 0 {
 		t.Errorf("expected balance: %d, got: %s", 0, res.String())
 	}
-
 }
 
 func TestEth_GetStorageAt(t *testing.T) {

rpc/types.go

@@ -49,7 +49,7 @@ func (bn *BlockNumber) UnmarshalJSON(data []byte) error {
 		return err
 	}
 	if blckNum > math.MaxInt64 {
-		return fmt.Errorf("Blocknumber too high")
+		return fmt.Errorf("blocknumber too high")
 	}
 
 	*bn = BlockNumber(blckNum)

x/evm/keeper.go

@@ -34,7 +34,7 @@ func (c *count) get() int {
 }
 
 func (c *count) increment() {
-	*c = *c + 1
+	*c++
 }
 
 func (c *count) reset() {

x/evm/types/querier.go

@@ -66,7 +66,7 @@ type QueryETHLogs struct {
 }
 
 func (q QueryETHLogs) String() string {
-	return string(fmt.Sprintf("%+v", q.Logs))
+	return fmt.Sprintf("%+v", q.Logs)
 }
 
 // QueryBloomFilter is response type for tx logs query