fix linter issues (#184)

.golangci.yml

@@ -52,6 +52,9 @@ issues:
     - text: "ST1003:"
       linters:
         - stylecheck
+    - text: "SA1019:"
+      linters:
+        - staticcheck
   max-issues-per-linter: 10000
   max-same-issues: 10000
 

app/app.go

@@ -162,7 +162,7 @@ var (
 
 var _ simapp.App = (*EthermintApp)(nil)
 
-//var _ server.Application (*EthermintApp)(nil)
+// var _ server.Application (*EthermintApp)(nil)
 
 // EthermintApp implements an extended ABCI application. It is an application
 // that may process transactions through Ethereum's EVM running atop of
@@ -358,7 +358,7 @@ func NewEthermintApp(
 	// TODO: do properly
 	// NOTE: we may consider parsing `appOpts` inside module constructors. For the moment
 	// we prefer to be more strict in what arguments the modules expect.
-	//var skipGenesisInvariants = cast.ToBool(appOpts.Get(crisis.FlagSkipGenesisInvariants))
+	// var skipGenesisInvariants = cast.ToBool(appOpts.Get(crisis.FlagSkipGenesisInvariants))
 	skipGenesisInvariants := true
 
 	// NOTE: Any module instantiated in the module manager that is later modified
@@ -425,10 +425,10 @@ func NewEthermintApp(
 	app.mm.RegisterRoutes(app.Router(), app.QueryRouter(), encodingConfig.Amino)
 	app.mm.RegisterServices(module.NewConfigurator(app.MsgServiceRouter(), app.GRPCQueryRouter()))
 
-	//add test gRPC service for testing gRPC queries in isolation
+	// add test gRPC service for testing gRPC queries in isolation
 	// testdata.RegisterTestServiceServer(app.GRPCQueryRouter(), testdata.TestServiceImpl{})
 
-	//create the simulation manager and define the order of the modules for deterministic simulations
+	// create the simulation manager and define the order of the modules for deterministic simulations
 
 	//NOTE: this is not required apps that don't use the simulator for fuzz testing
 	// transactions

cmd/ethermintd/flags.go

@@ -62,16 +62,16 @@ func addTxFlags(cmd *cobra.Command) *cobra.Command {
 	cmd.PersistentFlags().BoolVar(&logJSON, "log-json", false, "Use JSON as the output format of the own logger (default: text)")
 	cmd.PersistentFlags().BoolVar(&evmDebug, "evm-debug", false, "Enable EVM debug traces")
 	cmd.PersistentFlags().StringVar(&logLevel, "log-level", "info", "Sets the level of the own logger (error, warn, info, debug)")
-	//cmd.PersistentFlags().Bool(flags.FlagTrustNode, true, "Trust connected full node (don't verify proofs for responses)")
+	// cmd.PersistentFlags().Bool(flags.FlagTrustNode, true, "Trust connected full node (don't verify proofs for responses)")
 	cmd.PersistentFlags().String(flags.FlagKeyringBackend, keyring.BackendFile, "Select keyring's backend")
 
 	// --gas can accept integers and "simulate"
-	//cmd.PersistentFlags().Var(&flags.GasFlagVar, "gas", fmt.Sprintf(
+	// cmd.PersistentFlags().Var(&flags.GasFlagVar, "gas", fmt.Sprintf(
 	//	"gas limit to set per-transaction; set to %q to calculate required gas automatically (default %d)",
 	//	flags.GasFlagAuto, flags.DefaultGasLimit,
-	//))
+	// ))
 
-	//viper.BindPFlag(flags.FlagTrustNode, cmd.Flags().Lookup(flags.FlagTrustNode))
+	// viper.BindPFlag(flags.FlagTrustNode, cmd.Flags().Lookup(flags.FlagTrustNode))
 
 	// TODO: we need to handle the errors for these, decide if we should return error upward and handle
 	// nolint: errcheck

ethereum/rpc/namespaces/eth/api.go

@@ -198,7 +198,7 @@ func (e *PublicAPI) Accounts() ([]common.Address, error) {
 
 // BlockNumber returns the current block number.
 func (e *PublicAPI) BlockNumber() (hexutil.Uint64, error) {
-	//e.logger.Debugln("eth_blockNumber")
+	// e.logger.Debugln("eth_blockNumber")
 	return e.backend.BlockNumber()
 }
 

ethereum/rpc/namespaces/eth/filters/api.go

@@ -22,8 +22,8 @@ import (
 	evmtypes "github.com/tharsis/ethermint/x/evm/types"
 )
 
-// FiltersBackend defines the methods requided by the PublicFilterAPI backend
-type FiltersBackend interface {
+// Backend defines the methods requided by the PublicFilterAPI backend
+type Backend interface {
 	GetBlockByNumber(blockNum types.BlockNumber, fullTx bool) (map[string]interface{}, error)
 	HeaderByNumber(blockNum types.BlockNumber) (*ethtypes.Header, error)
 	HeaderByHash(blockHash common.Hash) (*ethtypes.Header, error)
@@ -51,14 +51,14 @@ type filter struct {
 // PublicFilterAPI offers support to create and manage filters. This will allow external clients to retrieve various
 // information related to the Ethereum protocol such as blocks, transactions and logs.
 type PublicFilterAPI struct {
-	backend   FiltersBackend
+	backend   Backend
 	events    *EventSystem
 	filtersMu sync.Mutex
 	filters   map[rpc.ID]*filter
 }
 
 // NewPublicAPI returns a new PublicFilterAPI instance.
-func NewPublicAPI(tmWSClient *rpcclient.WSClient, backend FiltersBackend) *PublicFilterAPI {
+func NewPublicAPI(tmWSClient *rpcclient.WSClient, backend Backend) *PublicFilterAPI {
 	api := &PublicFilterAPI{
 		backend: backend,
 		filters: make(map[rpc.ID]*filter),

ethereum/rpc/namespaces/eth/filters/filters.go

@@ -18,21 +18,21 @@ import (
 
 // Filter can be used to retrieve and filter logs.
 type Filter struct {
-	backend  FiltersBackend
+	backend  Backend
 	criteria filters.FilterCriteria
 	matcher  *bloombits.Matcher
 }
 
 // NewBlockFilter creates a new filter which directly inspects the contents of
 // a block to figure out whether it is interesting or not.
-func NewBlockFilter(backend FiltersBackend, criteria filters.FilterCriteria) *Filter {
+func NewBlockFilter(backend Backend, criteria filters.FilterCriteria) *Filter {
 	// Create a generic filter and convert it into a block filter
 	return newFilter(backend, criteria, nil)
 }
 
 // NewRangeFilter creates a new filter which uses a bloom filter on blocks to
 // figure out whether a particular block is interesting or not.
-func NewRangeFilter(backend FiltersBackend, begin, end int64, addresses []common.Address, topics [][]common.Hash) *Filter {
+func NewRangeFilter(backend Backend, begin, end int64, addresses []common.Address, topics [][]common.Hash) *Filter {
 	// Flatten the address and topic filter clauses into a single bloombits filter
 	// system. Since the bloombits are not positional, nil topics are permitted,
 	// which get flattened into a nil byte slice.
@@ -67,7 +67,7 @@ func NewRangeFilter(backend FiltersBackend, begin, end int64, addresses []common
 }
 
 // newFilter returns a new Filter
-func newFilter(backend FiltersBackend, criteria filters.FilterCriteria, matcher *bloombits.Matcher) *Filter {
+func newFilter(backend Backend, criteria filters.FilterCriteria, matcher *bloombits.Matcher) *Filter {
 	return &Filter{
 		backend:  backend,
 		criteria: criteria,

x/evm/module.go

@@ -81,7 +81,7 @@ func (AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry)
 	types.RegisterInterfaces(registry)
 }
 
-//____________________________________________________________________________
+// ____________________________________________________________________________
 
 // AppModule implements an application module for the evm module.
 type AppModule struct {

x/evm/types/chain_config.go

@@ -29,7 +29,7 @@ func (cc ChainConfig) EthereumConfig(chainID *big.Int) *params.ChainConfig {
 		IstanbulBlock:       getBlockValue(cc.IstanbulBlock),
 		MuirGlacierBlock:    getBlockValue(cc.MuirGlacierBlock),
 		BerlinBlock:         getBlockValue(cc.BerlinBlock),
-		//TODO(xlab): after upgrading ethereum to newer version, this should be set to YoloV2Block
+		// TODO(xlab): after upgrading ethereum to newer version, this should be set to YoloV2Block
 		YoloV3Block:   getBlockValue(cc.YoloV3Block),
 		EWASMBlock:    getBlockValue(cc.EWASMBlock),
 		CatalystBlock: getBlockValue(cc.CatalystBlock),