chore: fix linter issues

.github/workflows/lint.yml

@@ -11,6 +11,8 @@ on:
   pull_request:
     paths:
       - "**.go"
+      - ".golangci.yml"
+      - ".github/linters/*"
   push:
     branches:
       - master
@@ -37,6 +39,7 @@ jobs:
             **/**.go
             go.mod
             go.sum
+            .golangci.yml
 
       - name: Install dependencies
         run: sudo apt-get update && sudo apt-get install -y libpcap-dev

.golangci.yml

@@ -2,8 +2,7 @@ linters:
   enable:
     - asciicheck
     - bodyclose
-    - deadcode
-    - depguard
+    # - depguard
     - dogsled
     - dupl
     - errcheck
@@ -30,14 +29,11 @@ linters:
     - nakedret
     - nolintlint
     - prealloc
-    - staticcheck
-    - structcheck
     - stylecheck
     # - typecheck
     - unconvert
     # - unparam
     - unused
-    - varcheck
     # - whitespace
     # - wsl
 
@@ -53,7 +49,19 @@ linters-settings:
     max-blank-identifiers: 3
   golint:
     min-confidence: 0
+  goconst:
+    min-len: 5
+    min-occurrences: 5
+    ignore-tests: true
   maligned:
     suggest-new: true
   misspell:
     locale: US
+  revive:
+    rules:
+      # https://github.com/mgechev/revive/blob/master/RULES_DESCRIPTIONS.md#unused-parameter
+      - name: unused-parameter
+        severity: warning
+        disabled: false
+        arguments:
+          - allowRegex: "^_"

abci/client/grpc_client.go

@@ -47,7 +47,7 @@ func NewGRPCClient(logger log.Logger, addr string, mustConnect bool) Client {
 	return cli
 }
 
-func dialerFunc(ctx context.Context, addr string) (net.Conn, error) {
+func dialerFunc(_ctx context.Context, addr string) (net.Conn, error) {
 	return tmnet.Connect(addr)
 }
 
@@ -122,7 +122,7 @@ func (cli *grpcClient) Error() error {
 
 //----------------------------------------
 
-func (cli *grpcClient) Flush(ctx context.Context) error { return nil }
+func (cli *grpcClient) Flush(_ctx context.Context) error { return nil }
 
 func (cli *grpcClient) Echo(ctx context.Context, msg string) (*types.ResponseEcho, error) {
 	return cli.client.Echo(ctx, types.ToRequestEcho(msg).GetEcho(), grpc.WaitForReady(true))

abci/cmd/abci-cli/abci-cli.go

@@ -316,7 +316,7 @@ func compose(fs []func() error) error {
 	return err
 }
 
-func cmdTest(cmd *cobra.Command, args []string) error {
+func cmdTest(cmd *cobra.Command, _args []string) error {
 	ctx := cmd.Context()
 	return compose(
 		[]func() error{
@@ -379,7 +379,7 @@ func cmdTest(cmd *cobra.Command, args []string) error {
 		})
 }
 
-func cmdBatch(cmd *cobra.Command, args []string) error {
+func cmdBatch(cmd *cobra.Command, _args []string) error {
 	bufReader := bufio.NewReader(os.Stdin)
 LOOP:
 	for {
@@ -405,7 +405,7 @@ LOOP:
 	return nil
 }
 
-func cmdConsole(cmd *cobra.Command, args []string) error {
+func cmdConsole(cmd *cobra.Command, _args []string) error {
 	for {
 		fmt.Printf("> ")
 		bufReader := bufio.NewReader(os.Stdin)

abci/example/example_test.go

@@ -7,7 +7,6 @@ import (
 	"net"
 	"os"
 	"testing"
-	"time"
 
 	"github.com/stretchr/testify/require"
 
@@ -23,10 +22,6 @@ import (
 	tmnet "github.com/dashpay/tenderdash/libs/net"
 )
 
-func init() {
-	rand.Seed(time.Now().UnixNano())
-}
-
 func TestKVStore(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
@@ -98,7 +93,7 @@ func testBulk(ctx context.Context, t *testing.T, logger log.Logger, app types.Ap
 //-------------------------
 // test grpc
 
-func dialerFunc(ctx context.Context, addr string) (net.Conn, error) {
+func dialerFunc(_ctx context.Context, addr string) (net.Conn, error) {
 	return tmnet.Connect(addr)
 }
 

abci/example/kvstore/snapshots.go

@@ -1,4 +1,4 @@
-// nolint: gosec
+//nolint:gosec
 package kvstore
 
 import (
@@ -85,7 +85,7 @@ func (s *SnapshotStore) saveMetadata() error {
 	// save the file to a new file and move it to make saving atomic.
 	newFile := filepath.Join(s.dir, "metadata.json.new")
 	file := filepath.Join(s.dir, "metadata.json")
-	err = os.WriteFile(newFile, bz, 0644) // nolint: gosec
+	err = os.WriteFile(newFile, bz, 0644) //nolint:gosec
 	if err != nil {
 		return err
 	}

abci/example/kvstore/state.go

@@ -171,7 +171,7 @@ func (state kvState) GetAppHash() tmbytes.HexBytes {
 	return state.AppHash.Copy()
 }
 
-func (state *kvState) UpdateAppHash(lastCommittedState State, txs types1.Txs, txResults []*types.ExecTxResult) error {
+func (state *kvState) UpdateAppHash(lastCommittedState State, _txs types1.Txs, txResults []*types.ExecTxResult) error {
 	// UpdateAppHash updates app hash for the current app state.
 	txResultsHash, err := types.TxResultsHash(txResults)
 	if err != nil {

abci/example/kvstore/tx.go

@@ -119,7 +119,7 @@ func execTx(tx types.Tx, roundState State) (abci.ExecTxResult, error) {
 
 // execPrepareTx is noop. tx data is considered as placeholder
 // and is substitute at the PrepareProposal.
-func execPrepareTx(tx []byte) (abci.ExecTxResult, error) {
+func execPrepareTx(_tx []byte) (abci.ExecTxResult, error) {
 	// noop
 	return abci.ExecTxResult{}, nil
 }

abci/server/grpc_server.go

@@ -74,6 +74,6 @@ func (app *gRPCApplication) Echo(_ context.Context, req *types.RequestEcho) (*ty
 	return &types.ResponseEcho{Message: req.Message}, nil
 }
 
-func (app *gRPCApplication) Flush(_ context.Context, req *types.RequestFlush) (*types.ResponseFlush, error) {
+func (app *gRPCApplication) Flush(_ context.Context, _req *types.RequestFlush) (*types.ResponseFlush, error) {
 	return &types.ResponseFlush{}, nil
 }

abci/tests/server/client.go

@@ -91,7 +91,7 @@ func FinalizeBlock(ctx context.Context, client abciclient.Client, txBytes [][]by
 	return nil
 }
 
-func PrepareProposal(ctx context.Context, client abciclient.Client, txBytes [][]byte, codeExp []types.TxRecord_TxAction, dataExp []byte) error {
+func PrepareProposal(ctx context.Context, client abciclient.Client, txBytes [][]byte, codeExp []types.TxRecord_TxAction, _dataExp []byte) error {
 	res, _ := client.PrepareProposal(ctx, &types.RequestPrepareProposal{Txs: txBytes})
 	for i, tx := range res.TxRecords {
 		if tx.Action != codeExp[i] {

abci/types/application.go

@@ -55,45 +55,45 @@ func NewBaseApplication() *BaseApplication {
 	return &BaseApplication{}
 }
 
-func (BaseApplication) Info(_ context.Context, req *RequestInfo) (*ResponseInfo, error) {
+func (BaseApplication) Info(_ context.Context, _req *RequestInfo) (*ResponseInfo, error) {
 	return &ResponseInfo{}, nil
 }
 
-func (BaseApplication) CheckTx(_ context.Context, req *RequestCheckTx) (*ResponseCheckTx, error) {
+func (BaseApplication) CheckTx(_ context.Context, _req *RequestCheckTx) (*ResponseCheckTx, error) {
 	return &ResponseCheckTx{Code: CodeTypeOK}, nil
 }
 
-func (BaseApplication) ExtendVote(_ context.Context, req *RequestExtendVote) (*ResponseExtendVote, error) {
+func (BaseApplication) ExtendVote(_ context.Context, _req *RequestExtendVote) (*ResponseExtendVote, error) {
 	return &ResponseExtendVote{}, nil
 }
 
-func (BaseApplication) VerifyVoteExtension(_ context.Context, req *RequestVerifyVoteExtension) (*ResponseVerifyVoteExtension, error) {
+func (BaseApplication) VerifyVoteExtension(_ context.Context, _req *RequestVerifyVoteExtension) (*ResponseVerifyVoteExtension, error) {
 	return &ResponseVerifyVoteExtension{
 		Status: ResponseVerifyVoteExtension_ACCEPT,
 	}, nil
 }
 
-func (BaseApplication) Query(_ context.Context, req *RequestQuery) (*ResponseQuery, error) {
+func (BaseApplication) Query(_ context.Context, _req *RequestQuery) (*ResponseQuery, error) {
 	return &ResponseQuery{Code: CodeTypeOK}, nil
 }
 
-func (BaseApplication) InitChain(_ context.Context, req *RequestInitChain) (*ResponseInitChain, error) {
+func (BaseApplication) InitChain(_ context.Context, _req *RequestInitChain) (*ResponseInitChain, error) {
 	return &ResponseInitChain{}, nil
 }
 
-func (BaseApplication) ListSnapshots(_ context.Context, req *RequestListSnapshots) (*ResponseListSnapshots, error) {
+func (BaseApplication) ListSnapshots(_ context.Context, _req *RequestListSnapshots) (*ResponseListSnapshots, error) {
 	return &ResponseListSnapshots{}, nil
 }
 
-func (BaseApplication) OfferSnapshot(_ context.Context, req *RequestOfferSnapshot) (*ResponseOfferSnapshot, error) {
+func (BaseApplication) OfferSnapshot(_ context.Context, _req *RequestOfferSnapshot) (*ResponseOfferSnapshot, error) {
 	return &ResponseOfferSnapshot{}, nil
 }
 
 func (BaseApplication) LoadSnapshotChunk(_ context.Context, _ *RequestLoadSnapshotChunk) (*ResponseLoadSnapshotChunk, error) {
 	return &ResponseLoadSnapshotChunk{}, nil
 }
 
-func (BaseApplication) ApplySnapshotChunk(_ context.Context, req *RequestApplySnapshotChunk) (*ResponseApplySnapshotChunk, error) {
+func (BaseApplication) ApplySnapshotChunk(_ context.Context, _req *RequestApplySnapshotChunk) (*ResponseApplySnapshotChunk, error) {
 	return &ResponseApplySnapshotChunk{}, nil
 }
 
@@ -132,7 +132,7 @@ func (BaseApplication) ProcessProposal(_ context.Context, req *RequestProcessPro
 	}, nil
 }
 
-func (BaseApplication) FinalizeBlock(_ context.Context, req *RequestFinalizeBlock) (*ResponseFinalizeBlock, error) {
+func (BaseApplication) FinalizeBlock(_ context.Context, _req *RequestFinalizeBlock) (*ResponseFinalizeBlock, error) {
 
 	return &ResponseFinalizeBlock{}, nil
 }

cmd/abcidump/cmd/capture.go

@@ -68,7 +68,7 @@ func (captureCmd *CaptureCmd) Command() *cobra.Command {
 }
 
 // RunE executes traffic capture
-func (captureCmd *CaptureCmd) RunE(cmd *cobra.Command, args []string) error {
+func (captureCmd *CaptureCmd) RunE(_cmd *cobra.Command, _args []string) error {
 	logger.Debug("Starting packet capture", "port", captureCmd.Port)
 
 	return captureCmd.capture()

cmd/abcidump/cmd/cbor.go

@@ -54,7 +54,7 @@ func (cborCmd *CborCmd) Command() *cobra.Command {
 }
 
 // PreRunE parses command line arguments
-func (cborCmd *CborCmd) PreRunE(_ *cobra.Command, args []string) (err error) {
+func (cborCmd *CborCmd) PreRunE(_ *cobra.Command, _args []string) (err error) {
 	if cborCmd.Input, err = loadInputData(cborCmd.InputData, cborCmd.InputFormat); err != nil {
 		return err
 	}
@@ -142,7 +142,7 @@ func marshalMap(mapToMarshal map[interface{}]interface{}, indent []byte, out io.
 }
 
 // RunE executes main logic of this command
-func (cborCmd *CborCmd) RunE(_ *cobra.Command, args []string) error {
+func (cborCmd *CborCmd) RunE(_ *cobra.Command, _args []string) error {
 	data, err := io.ReadAll(cborCmd.Input)
 	if err != nil {
 		return fmt.Errorf("cannot read data: %w", err)

cmd/abcidump/cmd/parse.go

@@ -72,7 +72,7 @@ func (parseCmd *ParseCmd) Command() *cobra.Command {
 }
 
 // PreRunE parses command line arguments
-func (parseCmd *ParseCmd) PreRunE(cmd *cobra.Command, args []string) (err error) {
+func (parseCmd *ParseCmd) PreRunE(_cmd *cobra.Command, _args []string) (err error) {
 	if parseCmd.Input, err = loadInputData(parseCmd.InputData, parseCmd.InputFormat); err != nil {
 		return err
 	}
@@ -114,7 +114,7 @@ func loadInputData(input, format string) (reader io.Reader, err error) {
 }
 
 // RunE executes parsing logic
-func (parseCmd *ParseCmd) RunE(cmd *cobra.Command, args []string) error {
+func (parseCmd *ParseCmd) RunE(cmd *cobra.Command, _args []string) error {
 	var err error
 
 	parser := parser.NewParser(cmd.InOrStdin())

cmd/priv_val_server/main.go

@@ -161,7 +161,11 @@ func registerPrometheus(addr string, s *grpc.Server) *http.Server {
 	// Initialize all metrics.
 	grpcMetrics.InitializeMetrics(s)
 	// create http server to serve prometheus
-	httpServer := &http.Server{Handler: promhttp.HandlerFor(reg, promhttp.HandlerOpts{}), Addr: addr}
+	httpServer := &http.Server{
+		Handler:           promhttp.HandlerFor(reg, promhttp.HandlerOpts{}),
+		Addr:              addr,
+		ReadHeaderTimeout: 10 * time.Second,
+	}
 
 	go func() {
 		if err := httpServer.ListenAndServe(); err != nil {

cmd/tenderdash/commands/debug/kill.go

@@ -123,7 +123,7 @@ func killProc(pid int, dir string) error {
 	// pipe STDERR output from tailing the Tendermint process to a file
 	//
 	// NOTE: This will only work on UNIX systems.
-	cmd := exec.Command("tail", "-f", fmt.Sprintf("/proc/%d/fd/2", pid)) // nolint: gosec
+	cmd := exec.Command("tail", "-f", fmt.Sprintf("/proc/%d/fd/2", pid)) //nolint:gosec
 
 	outFile, err := os.Create(filepath.Join(dir, "stacktrace.out"))
 	if err != nil {

cmd/tenderdash/commands/debug/util.go

@@ -67,7 +67,7 @@ func copyConfig(home, dir string) error {
 func dumpProfile(dir, addr, profile string, debug int) error {
 	endpoint := fmt.Sprintf("%s/debug/pprof/%s?debug=%d", addr, profile, debug)
 
-	resp, err := http.Get(endpoint) // nolint: gosec
+	resp, err := http.Get(endpoint) //nolint:gosec
 	if err != nil {
 		return fmt.Errorf("failed to query for %s profile: %w", profile, err)
 	}

cmd/tenderdash/commands/gen_node_key.go

@@ -57,7 +57,7 @@ Seed phrase and optional password is read from standard input.`,
 	return cmd
 }
 
-func genNodeKeyFlagsPreRunE(cmd *cobra.Command, args []string) error {
+func genNodeKeyFlagsPreRunE(_cmd *cobra.Command, _args []string) error {
 	if useSeedPhrase && pemFile != "" {
 		return fmt.Errorf("--%s cannot be be used with --%s", flagFromMnemonic, flagFromPem)
 	}
@@ -138,7 +138,7 @@ func readMnemonic(in io.Reader, out io.Writer) (mnemonic string, password string
 }
 
 // nodeKeyFromMnemonic reads BIP39 mnemonic and optional passphrase from stdin, and derives node key from it.
-func nodeKeyFromMnemonic(cmd *cobra.Command, args []string) (types.NodeKey, error) {
+func nodeKeyFromMnemonic(cmd *cobra.Command, _args []string) (types.NodeKey, error) {
 	mnemonic, password, err := readMnemonic(cmd.InOrStdin(), cmd.OutOrStdout())
 	if err != nil {
 		return types.NodeKey{}, err

cmd/tenderdash/commands/reset.go

@@ -146,7 +146,7 @@ func ResetState(dbDir string, logger log.Logger) error {
 // ResetFilePV loads the file private validator and resets the watermark to 0. If used on an existing network,
 // this can cause the node to double sign.
 // XXX: this is unsafe and should only suitable for testnets.
-func ResetFilePV(privValKeyFile, privValStateFile string, logger log.Logger, keyType string) error {
+func ResetFilePV(privValKeyFile, privValStateFile string, logger log.Logger, _keyType string) error {
 	if _, err := os.Stat(privValKeyFile); err == nil {
 		pv, err := privval.LoadFilePVEmptyState(privValKeyFile, privValStateFile)
 		if err != nil {

crypto/bls12381/bls12381_test.go

@@ -1,4 +1,4 @@
-// nolint:lll
+//nolint:lll
 package bls12381
 
 import (
@@ -378,7 +378,8 @@ func TestRecoverThresholdSignatureFromSharesCaseStudy(t *testing.T) {
 			msg:             "C4E3500CAEC0AEB79CFA05F10EBE77717BEEF5D51159E2A89D8FE98B696BE4A9",
 		},
 	}
-	for i, tc := range testCases {
+	for i, testCase := range testCases {
+		tc := testCase
 		t.Run(fmt.Sprintf("test-case #%d", i), func(t *testing.T) {
 			t.Parallel()
 			var err error

crypto/merkle/proof_key_path_test.go

@@ -1,12 +1,10 @@
 package merkle
 
 import (
-	// it is ok to use math/rand here: we do not need a cryptographically secure random
-	// number generator here and we can run the tests a bit faster
-	"math/rand"
 	"testing"
 
 	"github.com/stretchr/testify/require"
+	"golang.org/x/exp/rand"
 )
 
 func TestKeyPath(t *testing.T) {
@@ -26,7 +24,7 @@ func TestKeyPath(t *testing.T) {
 					keys[i][j] = alphanum[rand.Intn(len(alphanum))]
 				}
 			case KeyEncodingHex:
-				rand.Read(keys[i])
+				_, _ = rand.Read(keys[i])
 			default:
 				require.Fail(t, "Unexpected encoding")
 			}