Tools configuration and linters (#215)

* tools config

* lint

* lint

* codecov

.circleci/config.yml

@@ -60,6 +60,27 @@ jobs:
           paths:
             - "/go/pkg/mod"
     
+  upload-coverage:
+    docker: # run the steps with Docker
+      # CircleCI Go images available at: https://hub.docker.com/r/circleci/golang/
+      - image: circleci/golang:1.13 #
+    working_directory: /go/src/github.com/cosmos/ethermint
+    steps:
+      - checkout
+      - run:
+          name: gather
+          command: |
+            for d in $(go list ./... | grep -v vendor); do
+                go test -race -coverprofile=profile.out -covermode=atomic "$d"
+                if [ -f profile.out ]; then
+                    cat profile.out >> coverage.txt
+                    rm profile.out
+                fi
+            done
+      - run:
+          name: upload
+          command: bash <(curl -s https://codecov.io/bash) -f coverage.txt
+
 workflows:
   version: 2
   build-workflow:

.codecov.yml

@@ -0,0 +1,58 @@
+#
+# This codecov.yml is the default configuration for
+# all repositories on Codecov. You may adjust the settings
+# below in your own codecov.yml in your repository.
+#
+coverage:
+  precision: 2
+  round: down
+  range: 70...100
+
+  status:
+    # Learn more at https://docs.codecov.io/docs/commit-status
+    project:
+      default:
+        threshold: 1% # allow this much decrease on project
+      app:
+        target: 70%
+        flags: app
+      modules:
+        target: 50%
+        flags: modules
+      core:
+        target: 50%
+        flags: core
+      clients:
+        flags: clients
+    changes: false
+
+comment:
+  layout: "reach, diff, files"
+  behavior: default # update if exists else create new
+  require_changes: true
+
+flags:
+  app:
+    paths:
+      - "app/"
+  modules:
+    paths:
+      - "x/"
+      - "!x/**/client/" # ignore client package
+  core:
+    paths:
+      - "core/"
+      - "crypto/"
+      - "types/"
+  clients:
+    paths:
+      - "rpc/"
+      - "client/"
+      - "x/**/client/"
+
+ignore:
+  - "docs"
+  - "*.md"
+  - "**/*.pb.go"
+  - "types/*.pb.go"
+  - "x/**/*.pb.go"

.golangci.yml

@@ -1,11 +1,9 @@
-# This file configures github.com/golangci/golangci-lint.
-
-run:
-  timeout: 2m
-  tests: true
-  skip-dirs-use-default: true
+# run:
+#   # timeout for analysis, e.g. 30s, 5m, default is 1m
+#   timeout: 5m
 
 linters:
+  disable-all: true
   enable:
     - bodyclose
     - deadcode
@@ -13,7 +11,7 @@ linters:
     - dogsled
     - errcheck
     - goconst
-    - gocyclo
+    - gocritic
     - gofmt
     - goimports
     - golint
@@ -22,7 +20,10 @@ linters:
     - govet
     - ineffassign
     - interfacer
+    - maligned
     - misspell
+    - nakedret
+    - prealloc
     - scopelint
     - staticcheck
     - structcheck
@@ -30,13 +31,32 @@ linters:
     - typecheck
     - unconvert
     - unused
+    - misspell
     - varcheck
 
 issues:
   exclude-rules:
+    - text: "Use of weak random number generator"
+      linters:
+        - gosec
     - text: "comment on exported var"
       linters:
         - golint
-    - text: "ST1005:"
+    - text: "don't use an underscore in package name"
+      linters:
+        - golint
+    - text: "ST1003:"
       linters:
         - stylecheck
+    # FIXME: Disabled until golangci-lint updates stylecheck with this fix:
+    # https://github.com/dominikh/go-tools/issues/389
+    - text: "ST1016:"
+      linters:
+        - stylecheck
+
+linters-settings:
+  dogsled:
+    max-blank-identifiers: 3
+  maligned:
+    # print struct with more effective memory layout or not, false by default
+    suggest-new: true

cmd/emintd/main.go

@@ -23,7 +23,6 @@ import (
 	"github.com/spf13/viper"
 
 	"github.com/cosmos/ethermint/app"
-	emintapp "github.com/cosmos/ethermint/app"
 	"github.com/cosmos/ethermint/client/genaccounts"
 	emintcrypto "github.com/cosmos/ethermint/crypto"
 
@@ -38,7 +37,7 @@ import (
 func main() {
 	cobra.EnableCommandSorting = false
 
-	cdc := emintapp.MakeCodec()
+	cdc := app.MakeCodec()
 
 	tmamino.RegisterKeyType(emintcrypto.PubKeySecp256k1{}, emintcrypto.PubKeyAminoName)
 	tmamino.RegisterKeyType(emintcrypto.PrivKeySecp256k1{}, emintcrypto.PrivKeyAminoName)
@@ -63,12 +62,12 @@ func main() {
 	}
 	// CLI commands to initialize the chain
 	rootCmd.AddCommand(
-		withChainIDValidation(genutilcli.InitCmd(ctx, cdc, emintapp.ModuleBasics, emintapp.DefaultNodeHome)),
-		genutilcli.CollectGenTxsCmd(ctx, cdc, auth.GenesisAccountIterator{}, emintapp.DefaultNodeHome),
+		withChainIDValidation(genutilcli.InitCmd(ctx, cdc, app.ModuleBasics, app.DefaultNodeHome)),
+		genutilcli.CollectGenTxsCmd(ctx, cdc, auth.GenesisAccountIterator{}, app.DefaultNodeHome),
 		genutilcli.GenTxCmd(
-			ctx, cdc, emintapp.ModuleBasics, staking.AppModuleBasic{}, auth.GenesisAccountIterator{}, emintapp.DefaultNodeHome, emintapp.DefaultCLIHome,
+			ctx, cdc, app.ModuleBasics, staking.AppModuleBasic{}, auth.GenesisAccountIterator{}, app.DefaultNodeHome, app.DefaultCLIHome,
 		),
-		genutilcli.ValidateGenesisCmd(ctx, cdc, emintapp.ModuleBasics),
+		genutilcli.ValidateGenesisCmd(ctx, cdc, app.ModuleBasics),
 
 		// AddGenesisAccountCmd allows users to add accounts to the genesis file
 		genaccounts.AddGenesisAccountCmd(ctx, cdc, app.DefaultNodeHome, app.DefaultCLIHome),
@@ -78,7 +77,7 @@ func main() {
 	server.AddCommands(ctx, cdc, rootCmd, newApp, exportAppStateAndTMValidators)
 
 	// prepare and add flags
-	executor := cli.PrepareBaseCmd(rootCmd, "EM", emintapp.DefaultNodeHome)
+	executor := cli.PrepareBaseCmd(rootCmd, "EM", app.DefaultNodeHome)
 	err := executor.Execute()
 	if err != nil {
 		panic(err)
@@ -86,7 +85,7 @@ func main() {
 }
 
 func newApp(logger tmlog.Logger, db dbm.DB, traceStore io.Writer) abci.Application {
-	return emintapp.NewEthermintApp(logger, db, true, 0,
+	return app.NewEthermintApp(logger, db, true, 0,
 		baseapp.SetPruning(store.NewPruningOptionsFromString(viper.GetString("pruning"))))
 }
 
@@ -95,7 +94,7 @@ func exportAppStateAndTMValidators(
 ) (json.RawMessage, []tmtypes.GenesisValidator, error) {
 
 	if height != -1 {
-		emintApp := emintapp.NewEthermintApp(logger, db, true, 0)
+		emintApp := app.NewEthermintApp(logger, db, true, 0)
 		err := emintApp.LoadHeight(height)
 		if err != nil {
 			return nil, nil, err
@@ -103,7 +102,7 @@ func exportAppStateAndTMValidators(
 		return emintApp.ExportAppStateAndValidators(forZeroHeight, jailWhiteList)
 	}
 
-	emintApp := emintapp.NewEthermintApp(logger, db, true, 0)
+	emintApp := app.NewEthermintApp(logger, db, true, 0)
 
 	return emintApp.ExportAppStateAndValidators(forZeroHeight, jailWhiteList)
 }
@@ -121,7 +120,7 @@ func withChainIDValidation(baseCmd *cobra.Command) *cobra.Command {
 		_, ok := new(big.Int).SetString(chainIDFlag, 10)
 		if !ok {
 			return fmt.Errorf(
-				fmt.Sprintf("Invalid chainID: %s, must be base-10 integer format", chainIDFlag))
+				fmt.Sprintf("invalid chainID: %s, must be base-10 integer format", chainIDFlag))
 		}
 
 		return baseRunE(cmd, args)

importer/importer_test.go

@@ -199,6 +199,7 @@ func TestImportBlocks(t *testing.T) {
 	blockchainInput, err := os.Open(flagBlockchain)
 	require.Nil(t, err)
 
+	// nolint: gosec
 	defer blockchainInput.Close()
 
 	// ethereum mainnet config

rpc/eth_api.go

@@ -12,7 +12,6 @@ import (
 	emintcrypto "github.com/cosmos/ethermint/crypto"
 	params "github.com/cosmos/ethermint/rpc/args"
 	emint "github.com/cosmos/ethermint/types"
-	etypes "github.com/cosmos/ethermint/types"
 	"github.com/cosmos/ethermint/utils"
 	"github.com/cosmos/ethermint/version"
 	"github.com/cosmos/ethermint/x/evm"
@@ -885,7 +884,7 @@ func (e *PublicEthAPI) generateFromArgs(args params.SendTxArgs) (msg *types.Ethe
 
 		// Set default gas price
 		// TODO: Change to min gas price from context once available through server/daemon
-		gasPrice = big.NewInt(etypes.DefaultGasPrice)
+		gasPrice = big.NewInt(emint.DefaultGasPrice)
 	}
 
 	if args.Nonce == nil {

rpc/net_api.go

@@ -20,7 +20,7 @@ func NewPublicNetAPI(cliCtx context.CLIContext) *PublicNetAPI {
 	// parse the chainID from a integer string
 	intChainID, err := strconv.ParseUint(chainID, 0, 64)
 	if err != nil {
-		panic(fmt.Sprintf("Invalid chainID: %s, must be integer format", chainID))
+		panic(fmt.Sprintf("invalid chainID: %s, must be integer format", chainID))
 	}
 
 	return &PublicNetAPI{

types/account.go

@@ -59,15 +59,17 @@ func (acc Account) Balance() sdk.Int {
 func (acc Account) SetBalance(amt sdk.Int) {
 	coins := acc.GetCoins()
 	diff := amt.Sub(coins.AmountOf(DenomDefault))
-	if diff.IsZero() {
-		return
-	} else if diff.IsPositive() {
+	switch {
+	case diff.IsPositive():
 		// Increase coins to amount
-		coins = coins.Add(sdk.Coins{sdk.NewCoin(DenomDefault, diff)})
-	} else {
+		coins = coins.Add(sdk.NewCoins(sdk.NewCoin(DenomDefault, diff)))
+	case diff.IsNegative():
 		// Decrease coins to amount
-		coins = coins.Sub(sdk.Coins{sdk.NewCoin(DenomDefault, diff.Neg())})
+		coins = coins.Sub(sdk.NewCoins(sdk.NewCoin(DenomDefault, diff.Neg())))
+	default:
+		return
 	}
+
 	if err := acc.SetCoins(coins); err != nil {
 		panic(fmt.Sprintf("Could not set coins for address %s", acc.GetAddress()))
 	}

x/evm/types/genesis.go

@@ -28,10 +28,10 @@ type (
 func ValidateGenesis(data GenesisState) error {
 	for _, acct := range data.Accounts {
 		if len(acct.Address.Bytes()) == 0 {
-			return fmt.Errorf("Invalid GenesisAccount Error: Missing Address")
+			return fmt.Errorf("invalid GenesisAccount Error: Missing Address")
 		}
 		if acct.Balance == nil {
-			return fmt.Errorf("Invalid GenesisAccount Error: Missing Balance")
+			return fmt.Errorf("invalid GenesisAccount Error: Missing Balance")
 		}
 	}
 	return nil

x/evm/types/msg.go

@@ -340,6 +340,7 @@ func TxDecoder(cdc *codec.Codec) sdk.TxDecoder {
 // returns the sender or an error.
 //
 // Ref: Ethereum Yellow Paper (BYZANTIUM VERSION 69351d5) Appendix F
+// nolint: gocritic
 func recoverEthSig(R, S, Vb *big.Int, sigHash ethcmn.Hash) (ethcmn.Address, error) {
 	if Vb.BitLen() > 8 {
 		return ethcmn.Address{}, errors.New("invalid signature")

x/evm/types/msg_encoding.go

@@ -42,7 +42,7 @@ func marshalAmino(td EncodableTxData) (string, error) {
 	return string(bz), err
 }
 
-func unmarshalAmino(td *EncodableTxData, text string) (err error) {
+func unmarshalAmino(td *EncodableTxData, text string) error {
 	return cdc.UnmarshalBinaryBare([]byte(text), td)
 }
 
@@ -67,11 +67,11 @@ func (td TxData) MarshalAmino() (string, error) {
 }
 
 // UnmarshalAmino defines custom decoding scheme for TxData
-func (td *TxData) UnmarshalAmino(text string) (err error) {
+func (td *TxData) UnmarshalAmino(text string) error {
 	e := new(EncodableTxData)
-	err = unmarshalAmino(e, text)
+	err := unmarshalAmino(e, text)
 	if err != nil {
-		return
+		return err
 	}
 
 	td.AccountNonce = e.AccountNonce
@@ -82,8 +82,9 @@ func (td *TxData) UnmarshalAmino(text string) (err error) {
 
 	price, err := utils.UnmarshalBigInt(e.Price)
 	if err != nil {
-		return
+		return err
 	}
+
 	if td.Price != nil {
 		td.Price.Set(price)
 	} else {
@@ -92,8 +93,9 @@ func (td *TxData) UnmarshalAmino(text string) (err error) {
 
 	amt, err := utils.UnmarshalBigInt(e.Amount)
 	if err != nil {
-		return
+		return err
 	}
+
 	if td.Amount != nil {
 		td.Amount.Set(amt)
 	} else {
@@ -102,8 +104,9 @@ func (td *TxData) UnmarshalAmino(text string) (err error) {
 
 	v, err := utils.UnmarshalBigInt(e.V)
 	if err != nil {
-		return
+		return err
 	}
+
 	if td.V != nil {
 		td.V.Set(v)
 	} else {
@@ -112,8 +115,9 @@ func (td *TxData) UnmarshalAmino(text string) (err error) {
 
 	r, err := utils.UnmarshalBigInt(e.R)
 	if err != nil {
-		return
+		return err
 	}
+
 	if td.R != nil {
 		td.R.Set(r)
 	} else {
@@ -122,15 +126,16 @@ func (td *TxData) UnmarshalAmino(text string) (err error) {
 
 	s, err := utils.UnmarshalBigInt(e.S)
 	if err != nil {
-		return
+		return err
 	}
+
 	if td.S != nil {
 		td.S.Set(s)
 	} else {
 		td.S = s
 	}
 
-	return
+	return nil
 }
 
 // TODO: Implement JSON marshaling/ unmarshaling for this type

x/evm/types/msg_test.go

@@ -9,7 +9,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/ethermint/crypto"
 	"github.com/cosmos/ethermint/utils"
-	"github.com/ethereum/go-ethereum/common"
 	ethcmn "github.com/ethereum/go-ethereum/common"
 	ethtypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -36,12 +35,12 @@ func TestMsgEthereumTx(t *testing.T) {
 
 func TestMsgEthereumTxValidation(t *testing.T) {
 	testCases := []struct {
+		payload    []byte
+		amount     *big.Int
+		gasPrice   *big.Int
+		gasLimit   uint64
 		nonce      uint64
 		to         ethcmn.Address
-		amount     *big.Int
-		gasLimit   uint64
-		gasPrice   *big.Int
-		payload    []byte
 		expectPass bool
 	}{
 		{amount: big.NewInt(100), gasPrice: big.NewInt(100000), expectPass: true},
@@ -183,13 +182,13 @@ func TestMarshalAndUnmarshalLogs(t *testing.T) {
 
 	logs := []*ethtypes.Log{
 		{
-			Address: common.BytesToAddress([]byte{0x11}),
-			TxHash:  common.HexToHash("0x01"),
+			Address: ethcmn.BytesToAddress([]byte{0x11}),
+			TxHash:  ethcmn.HexToHash("0x01"),
 			// May need to find workaround since Topics is required to unmarshal from JSON
-			Topics:  []common.Hash{},
+			Topics:  []ethcmn.Hash{},
 			Removed: true,
 		},
-		{Address: common.BytesToAddress([]byte{0x01, 0x11}), Topics: []common.Hash{}},
+		{Address: ethcmn.BytesToAddress([]byte{0x01, 0x11}), Topics: []ethcmn.Hash{}},
 	}
 
 	raw, err := codec.MarshalJSONIndent(cdc, logs)

x/evm/types/state_object.go

@@ -51,22 +51,18 @@ type (
 	// Account values can be accessed and modified through the object.
 	// Finally, call CommitTrie to write the modified storage trie into a database.
 	stateObject struct {
-		address ethcmn.Address
-		stateDB *CommitStateDB
-		account *types.Account
-
+		code types.Code // contract bytecode, which gets set when code is loaded
 		// DB error.
 		// State objects are used by the consensus core and VM which are
 		// unable to deal with database-level errors. Any error that occurs
 		// during a database read is memoized here and will eventually be returned
 		// by StateDB.Commit.
 		dbErr         error
-
-		code types.Code // contract bytecode, which gets set when code is loaded
-
+		stateDB       *CommitStateDB
+		account       *types.Account
 		originStorage types.Storage // Storage cache of original entries to dedup rewrites
 		dirtyStorage  types.Storage // Storage entries that need to be flushed to disk
-
+		address       ethcmn.Address
 		// cache flags
 		//
 		// When an object is marked suicided it will be delete from the trie during

x/evm/types/state_transition.go

@@ -14,16 +14,16 @@ import (
 
 // StateTransition defines data to transitionDB in evm
 type StateTransition struct {
-	Sender       common.Address
-	AccountNonce uint64
-	Price        *big.Int
-	GasLimit     uint64
-	Recipient    *common.Address
-	Amount       *big.Int
 	Payload      []byte
-	Csdb         *CommitStateDB
+	Recipient    *common.Address
+	AccountNonce uint64
+	GasLimit     uint64
+	Price        *big.Int
+	Amount       *big.Int
 	ChainID      *big.Int
+	Csdb         *CommitStateDB
 	THash        *common.Hash
+	Sender       common.Address
 	Simulate     bool
 }
 

x/evm/types/statedb.go

@@ -294,6 +294,7 @@ func (csdb *CommitStateDB) GetLogs(hash ethcmn.Hash) []*ethtypes.Log {
 
 // Logs returns all the current logs in the state.
 func (csdb *CommitStateDB) Logs() []*ethtypes.Log {
+	// nolint: prealloc
 	var logs []*ethtypes.Log
 	for _, lgs := range csdb.logs {
 		logs = append(logs, lgs...)
@@ -337,7 +338,7 @@ func (csdb *CommitStateDB) StorageTrie(addr ethcmn.Address) ethstate.Trie {
 // in the cache, it will either be removed, or have it's code set and/or it's
 // state (storage) updated. In addition, the state object (account) itself will
 // be written. Finally, the root hash (version) will be returned.
-func (csdb *CommitStateDB) Commit(deleteEmptyObjects bool) (root ethcmn.Hash, err error) {
+func (csdb *CommitStateDB) Commit(deleteEmptyObjects bool) (ethcmn.Hash, error) {
 	defer csdb.clearJournalAndRefund()
 
 	// remove dirty state object entries based on the journal
@@ -372,7 +373,7 @@ func (csdb *CommitStateDB) Commit(deleteEmptyObjects bool) (root ethcmn.Hash, er
 	// NOTE: Ethereum returns the trie merkle root here, but as commitment
 	// actually happens in the BaseApp at EndBlocker, we do not know the root at
 	// this time.
-	return
+	return ethcmn.Hash{}, nil
 }
 
 // Finalise finalizes the state objects (accounts) state by setting their state,

x/evm/types/statedb_test.go

@@ -12,7 +12,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/params"
 	"github.com/stretchr/testify/require"
 
-	"github.com/ethereum/go-ethereum/common"
 	ethcmn "github.com/ethereum/go-ethereum/common"
 	ethtypes "github.com/ethereum/go-ethereum/core/types"
 
@@ -79,7 +78,7 @@ func TestBloomFilter(t *testing.T) {
 
 	// Prepare db for logs
 	tHash := ethcmn.BytesToHash([]byte{0x1})
-	stateDB.Prepare(tHash, common.Hash{}, 0)
+	stateDB.Prepare(tHash, ethcmn.Hash{}, 0)
 
 	contractAddress := ethcmn.BigToAddress(big.NewInt(1))
 

x/evm/types/utils.go

@@ -67,7 +67,7 @@ func DecodeReturnData(bytes []byte) (addr ethcmn.Address, bloom ethtypes.Bloom,
 		bloom = ethtypes.BytesToBloom(bytes[bloomIdx:returnIdx])
 		ret = bytes[returnIdx:]
 	} else {
-		err = fmt.Errorf("Invalid format for encoded data, message must be an EVM state transition")
+		err = fmt.Errorf("invalid format for encoded data, message must be an EVM state transition")
 	}
 
 	return