core/state: fix staticcheck warnings (#20357)

Also remove dependency on gopkg.in/check.v1 in tests.

core/state/dump.go

@@ -47,7 +47,9 @@ type Dump struct {
 }
 
 // iterativeDump is a 'collector'-implementation which dump output line-by-line iteratively
-type iterativeDump json.Encoder
+type iterativeDump struct {
+	*json.Encoder
+}
 
 // Collector interface which the state trie calls during iteration
 type collector interface {
@@ -55,15 +57,15 @@ type collector interface {
 	onAccount(common.Address, DumpAccount)
 }
 
-func (self *Dump) onRoot(root common.Hash) {
+func (d *Dump) onRoot(root common.Hash) {
-	self.Root = fmt.Sprintf("%x", root)
+	d.Root = fmt.Sprintf("%x", root)
 }
 
-func (self *Dump) onAccount(addr common.Address, account DumpAccount) {
+func (d *Dump) onAccount(addr common.Address, account DumpAccount) {
-	self.Accounts[addr] = account
+	d.Accounts[addr] = account
 }
 
-func (self iterativeDump) onAccount(addr common.Address, account DumpAccount) {
+func (d iterativeDump) onAccount(addr common.Address, account DumpAccount) {
 	dumpAccount := &DumpAccount{
 		Balance:   account.Balance,
 		Nonce:     account.Nonce,
@@ -77,25 +79,26 @@ func (self iterativeDump) onAccount(addr common.Address, account DumpAccount) {
 	if addr != (common.Address{}) {
 		dumpAccount.Address = &addr
 	}
-	(*json.Encoder)(&self).Encode(dumpAccount)
+	d.Encode(dumpAccount)
 }
-func (self iterativeDump) onRoot(root common.Hash) {
+
-	(*json.Encoder)(&self).Encode(struct {
+func (d iterativeDump) onRoot(root common.Hash) {
+	d.Encode(struct {
 		Root common.Hash `json:"root"`
 	}{root})
 }
 
-func (self *StateDB) dump(c collector, excludeCode, excludeStorage, excludeMissingPreimages bool) {
+func (s *StateDB) dump(c collector, excludeCode, excludeStorage, excludeMissingPreimages bool) {
 	emptyAddress := (common.Address{})
 	missingPreimages := 0
-	c.onRoot(self.trie.Hash())
+	c.onRoot(s.trie.Hash())
-	it := trie.NewIterator(self.trie.NodeIterator(nil))
+	it := trie.NewIterator(s.trie.NodeIterator(nil))
 	for it.Next() {
 		var data Account
 		if err := rlp.DecodeBytes(it.Value, &data); err != nil {
 			panic(err)
 		}
-		addr := common.BytesToAddress(self.trie.GetKey(it.Key))
+		addr := common.BytesToAddress(s.trie.GetKey(it.Key))
 		obj := newObject(nil, addr, data)
 		account := DumpAccount{
 			Balance:  data.Balance.String(),
@@ -112,18 +115,18 @@ func (self *StateDB) dump(c collector, excludeCode, excludeStorage, excludeMissi
 			account.SecureKey = it.Key
 		}
 		if !excludeCode {
-			account.Code = common.Bytes2Hex(obj.Code(self.db))
+			account.Code = common.Bytes2Hex(obj.Code(s.db))
 		}
 		if !excludeStorage {
 			account.Storage = make(map[common.Hash]string)
-			storageIt := trie.NewIterator(obj.getTrie(self.db).NodeIterator(nil))
+			storageIt := trie.NewIterator(obj.getTrie(s.db).NodeIterator(nil))
 			for storageIt.Next() {
 				_, content, _, err := rlp.Split(storageIt.Value)
 				if err != nil {
 					log.Error("Failed to decode the value returned by iterator", "error", err)
 					continue
 				}
-				account.Storage[common.BytesToHash(self.trie.GetKey(storageIt.Key))] = common.Bytes2Hex(content)
+				account.Storage[common.BytesToHash(s.trie.GetKey(storageIt.Key))] = common.Bytes2Hex(content)
 			}
 		}
 		c.onAccount(addr, account)
@@ -134,17 +137,17 @@ func (self *StateDB) dump(c collector, excludeCode, excludeStorage, excludeMissi
 }
 
 // RawDump returns the entire state an a single large object
-func (self *StateDB) RawDump(excludeCode, excludeStorage, excludeMissingPreimages bool) Dump {
+func (s *StateDB) RawDump(excludeCode, excludeStorage, excludeMissingPreimages bool) Dump {
 	dump := &Dump{
 		Accounts: make(map[common.Address]DumpAccount),
 	}
-	self.dump(dump, excludeCode, excludeStorage, excludeMissingPreimages)
+	s.dump(dump, excludeCode, excludeStorage, excludeMissingPreimages)
 	return *dump
 }
 
 // Dump returns a JSON string representing the entire state as a single json-object
-func (self *StateDB) Dump(excludeCode, excludeStorage, excludeMissingPreimages bool) []byte {
+func (s *StateDB) Dump(excludeCode, excludeStorage, excludeMissingPreimages bool) []byte {
-	dump := self.RawDump(excludeCode, excludeStorage, excludeMissingPreimages)
+	dump := s.RawDump(excludeCode, excludeStorage, excludeMissingPreimages)
 	json, err := json.MarshalIndent(dump, "", "    ")
 	if err != nil {
 		fmt.Println("dump err", err)
@@ -153,6 +156,6 @@ func (self *StateDB) Dump(excludeCode, excludeStorage, excludeMissingPreimages b
 }
 
 // IterativeDump dumps out accounts as json-objects, delimited by linebreaks on stdout
-func (self *StateDB) IterativeDump(excludeCode, excludeStorage, excludeMissingPreimages bool, output *json.Encoder) {
+func (s *StateDB) IterativeDump(excludeCode, excludeStorage, excludeMissingPreimages bool, output *json.Encoder) {
-	self.dump(iterativeDump(*output), excludeCode, excludeStorage, excludeMissingPreimages)
+	s.dump(iterativeDump{output}, excludeCode, excludeStorage, excludeMissingPreimages)
 }

core/state/journal.go

@@ -127,9 +127,7 @@ type (
 		hash common.Hash
 	}
 	touchChange struct {
-		account   *common.Address
+		account *common.Address
-		prev      bool
-		prevDirty bool
 	}
 )
 

core/state/main_test.go

@@ -1,25 +0,0 @@
-// Copyright 2014 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package state
-
-import (
-	"testing"
-
-	checker "gopkg.in/check.v1"
-)
-
-func Test(t *testing.T) { checker.TestingT(t) }

core/state/state_test.go

@@ -25,19 +25,24 @@ import (
 	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
-	checker "gopkg.in/check.v1"
 )
 
-type StateSuite struct {
+var toAddr = common.BytesToAddress
+
+type stateTest struct {
 	db    ethdb.Database
 	state *StateDB
 }
 
-var _ = checker.Suite(&StateSuite{})
+func newStateTest() *stateTest {
+	db := rawdb.NewMemoryDatabase()
+	sdb, _ := New(common.Hash{}, NewDatabase(db))
+	return &stateTest{db: db, state: sdb}
+}
 
-var toAddr = common.BytesToAddress
+func TestDump(t *testing.T) {
+	s := newStateTest()
 
-func (s *StateSuite) TestDump(c *checker.C) {
 	// generate a few entries
 	obj1 := s.state.GetOrNewStateObject(toAddr([]byte{0x01}))
 	obj1.AddBalance(big.NewInt(22))
@@ -78,16 +83,12 @@ func (s *StateSuite) TestDump(c *checker.C) {
     }
 }`
 	if got != want {
-		c.Errorf("dump mismatch:\ngot: %s\nwant: %s\n", got, want)
+		t.Errorf("dump mismatch:\ngot: %s\nwant: %s\n", got, want)
 	}
 }
 
-func (s *StateSuite) SetUpTest(c *checker.C) {
+func TestNull(t *testing.T) {
-	s.db = rawdb.NewMemoryDatabase()
+	s := newStateTest()
-	s.state, _ = New(common.Hash{}, NewDatabase(s.db))
-}
-
-func (s *StateSuite) TestNull(c *checker.C) {
 	address := common.HexToAddress("0x823140710bf13990e4500136726d8b55")
 	s.state.CreateAccount(address)
 	//value := common.FromHex("0x823140710bf13990e4500136726d8b55")
@@ -97,18 +98,19 @@ func (s *StateSuite) TestNull(c *checker.C) {
 	s.state.Commit(false)
 
 	if value := s.state.GetState(address, common.Hash{}); value != (common.Hash{}) {
-		c.Errorf("expected empty current value, got %x", value)
+		t.Errorf("expected empty current value, got %x", value)
 	}
 	if value := s.state.GetCommittedState(address, common.Hash{}); value != (common.Hash{}) {
-		c.Errorf("expected empty committed value, got %x", value)
+		t.Errorf("expected empty committed value, got %x", value)
 	}
 }
 
-func (s *StateSuite) TestSnapshot(c *checker.C) {
+func TestSnapshot(t *testing.T) {
 	stateobjaddr := toAddr([]byte("aa"))
 	var storageaddr common.Hash
 	data1 := common.BytesToHash([]byte{42})
 	data2 := common.BytesToHash([]byte{43})
+	s := newStateTest()
 
 	// snapshot the genesis state
 	genesis := s.state.Snapshot()
@@ -121,21 +123,28 @@ func (s *StateSuite) TestSnapshot(c *checker.C) {
 	s.state.SetState(stateobjaddr, storageaddr, data2)
 	s.state.RevertToSnapshot(snapshot)
 
-	c.Assert(s.state.GetState(stateobjaddr, storageaddr), checker.DeepEquals, data1)
+	if v := s.state.GetState(stateobjaddr, storageaddr); v != data1 {
-	c.Assert(s.state.GetCommittedState(stateobjaddr, storageaddr), checker.DeepEquals, common.Hash{})
+		t.Errorf("wrong storage value %v, want %v", v, data1)
+	}
+	if v := s.state.GetCommittedState(stateobjaddr, storageaddr); v != (common.Hash{}) {
+		t.Errorf("wrong committed storage value %v, want %v", v, common.Hash{})
+	}
 
 	// revert up to the genesis state and ensure correct content
 	s.state.RevertToSnapshot(genesis)
-	c.Assert(s.state.GetState(stateobjaddr, storageaddr), checker.DeepEquals, common.Hash{})
+	if v := s.state.GetState(stateobjaddr, storageaddr); v != (common.Hash{}) {
-	c.Assert(s.state.GetCommittedState(stateobjaddr, storageaddr), checker.DeepEquals, common.Hash{})
+		t.Errorf("wrong storage value %v, want %v", v, common.Hash{})
+	}
+	if v := s.state.GetCommittedState(stateobjaddr, storageaddr); v != (common.Hash{}) {
+		t.Errorf("wrong committed storage value %v, want %v", v, common.Hash{})
+	}
 }
 
-func (s *StateSuite) TestSnapshotEmpty(c *checker.C) {
+func TestSnapshotEmpty(t *testing.T) {
+	s := newStateTest()
 	s.state.RevertToSnapshot(s.state.Snapshot())
 }
 
-// use testing instead of checker because checker does not support
-// printing/logging in tests (-check.vv does not work)
 func TestSnapshot2(t *testing.T) {
 	state, _ := New(common.Hash{}, NewDatabase(rawdb.NewMemoryDatabase()))
 

core/state/statedb.go

@@ -124,115 +124,115 @@ func New(root common.Hash, db Database) (*StateDB, error) {
 }
 
 // setError remembers the first non-nil error it is called with.
-func (self *StateDB) setError(err error) {
+func (s *StateDB) setError(err error) {
-	if self.dbErr == nil {
+	if s.dbErr == nil {
-		self.dbErr = err
+		s.dbErr = err
 	}
 }
 
-func (self *StateDB) Error() error {
+func (s *StateDB) Error() error {
-	return self.dbErr
+	return s.dbErr
 }
 
 // Reset clears out all ephemeral state objects from the state db, but keeps
 // the underlying state trie to avoid reloading data for the next operations.
-func (self *StateDB) Reset(root common.Hash) error {
+func (s *StateDB) Reset(root common.Hash) error {
-	tr, err := self.db.OpenTrie(root)
+	tr, err := s.db.OpenTrie(root)
 	if err != nil {
 		return err
 	}
-	self.trie = tr
+	s.trie = tr
-	self.stateObjects = make(map[common.Address]*stateObject)
+	s.stateObjects = make(map[common.Address]*stateObject)
-	self.stateObjectsPending = make(map[common.Address]struct{})
+	s.stateObjectsPending = make(map[common.Address]struct{})
-	self.stateObjectsDirty = make(map[common.Address]struct{})
+	s.stateObjectsDirty = make(map[common.Address]struct{})
-	self.thash = common.Hash{}
+	s.thash = common.Hash{}
-	self.bhash = common.Hash{}
+	s.bhash = common.Hash{}
-	self.txIndex = 0
+	s.txIndex = 0
-	self.logs = make(map[common.Hash][]*types.Log)
+	s.logs = make(map[common.Hash][]*types.Log)
-	self.logSize = 0
+	s.logSize = 0
-	self.preimages = make(map[common.Hash][]byte)
+	s.preimages = make(map[common.Hash][]byte)
-	self.clearJournalAndRefund()
+	s.clearJournalAndRefund()
 	return nil
 }
 
-func (self *StateDB) AddLog(log *types.Log) {
+func (s *StateDB) AddLog(log *types.Log) {
-	self.journal.append(addLogChange{txhash: self.thash})
+	s.journal.append(addLogChange{txhash: s.thash})
 
-	log.TxHash = self.thash
+	log.TxHash = s.thash
-	log.BlockHash = self.bhash
+	log.BlockHash = s.bhash
-	log.TxIndex = uint(self.txIndex)
+	log.TxIndex = uint(s.txIndex)
-	log.Index = self.logSize
+	log.Index = s.logSize
-	self.logs[self.thash] = append(self.logs[self.thash], log)
+	s.logs[s.thash] = append(s.logs[s.thash], log)
-	self.logSize++
+	s.logSize++
 }
 
-func (self *StateDB) GetLogs(hash common.Hash) []*types.Log {
+func (s *StateDB) GetLogs(hash common.Hash) []*types.Log {
-	return self.logs[hash]
+	return s.logs[hash]
 }
 
-func (self *StateDB) Logs() []*types.Log {
+func (s *StateDB) Logs() []*types.Log {
 	var logs []*types.Log
-	for _, lgs := range self.logs {
+	for _, lgs := range s.logs {
 		logs = append(logs, lgs...)
 	}
 	return logs
 }
 
 // AddPreimage records a SHA3 preimage seen by the VM.
-func (self *StateDB) AddPreimage(hash common.Hash, preimage []byte) {
+func (s *StateDB) AddPreimage(hash common.Hash, preimage []byte) {
-	if _, ok := self.preimages[hash]; !ok {
+	if _, ok := s.preimages[hash]; !ok {
-		self.journal.append(addPreimageChange{hash: hash})
+		s.journal.append(addPreimageChange{hash: hash})
 		pi := make([]byte, len(preimage))
 		copy(pi, preimage)
-		self.preimages[hash] = pi
+		s.preimages[hash] = pi
 	}
 }
 
 // Preimages returns a list of SHA3 preimages that have been submitted.
-func (self *StateDB) Preimages() map[common.Hash][]byte {
+func (s *StateDB) Preimages() map[common.Hash][]byte {
-	return self.preimages
+	return s.preimages
 }
 
 // AddRefund adds gas to the refund counter
-func (self *StateDB) AddRefund(gas uint64) {
+func (s *StateDB) AddRefund(gas uint64) {
-	self.journal.append(refundChange{prev: self.refund})
+	s.journal.append(refundChange{prev: s.refund})
-	self.refund += gas
+	s.refund += gas
 }
 
 // SubRefund removes gas from the refund counter.
 // This method will panic if the refund counter goes below zero
-func (self *StateDB) SubRefund(gas uint64) {
+func (s *StateDB) SubRefund(gas uint64) {
-	self.journal.append(refundChange{prev: self.refund})
+	s.journal.append(refundChange{prev: s.refund})
-	if gas > self.refund {
+	if gas > s.refund {
 		panic("Refund counter below zero")
 	}
-	self.refund -= gas
+	s.refund -= gas
 }
 
 // Exist reports whether the given account address exists in the state.
 // Notably this also returns true for suicided accounts.
-func (self *StateDB) Exist(addr common.Address) bool {
+func (s *StateDB) Exist(addr common.Address) bool {
-	return self.getStateObject(addr) != nil
+	return s.getStateObject(addr) != nil
 }
 
 // Empty returns whether the state object is either non-existent
 // or empty according to the EIP161 specification (balance = nonce = code = 0)
-func (self *StateDB) Empty(addr common.Address) bool {
+func (s *StateDB) Empty(addr common.Address) bool {
-	so := self.getStateObject(addr)
+	so := s.getStateObject(addr)
 	return so == nil || so.empty()
 }
 
 // Retrieve the balance from the given address or 0 if object not found
-func (self *StateDB) GetBalance(addr common.Address) *big.Int {
+func (s *StateDB) GetBalance(addr common.Address) *big.Int {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return stateObject.Balance()
 	}
 	return common.Big0
 }
 
-func (self *StateDB) GetNonce(addr common.Address) uint64 {
+func (s *StateDB) GetNonce(addr common.Address) uint64 {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return stateObject.Nonce()
 	}
@@ -241,40 +241,40 @@ func (self *StateDB) GetNonce(addr common.Address) uint64 {
 }
 
 // TxIndex returns the current transaction index set by Prepare.
-func (self *StateDB) TxIndex() int {
+func (s *StateDB) TxIndex() int {
-	return self.txIndex
+	return s.txIndex
 }
 
 // BlockHash returns the current block hash set by Prepare.
-func (self *StateDB) BlockHash() common.Hash {
+func (s *StateDB) BlockHash() common.Hash {
-	return self.bhash
+	return s.bhash
 }
 
-func (self *StateDB) GetCode(addr common.Address) []byte {
+func (s *StateDB) GetCode(addr common.Address) []byte {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
-		return stateObject.Code(self.db)
+		return stateObject.Code(s.db)
 	}
 	return nil
 }
 
-func (self *StateDB) GetCodeSize(addr common.Address) int {
+func (s *StateDB) GetCodeSize(addr common.Address) int {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject == nil {
 		return 0
 	}
 	if stateObject.code != nil {
 		return len(stateObject.code)
 	}
-	size, err := self.db.ContractCodeSize(stateObject.addrHash, common.BytesToHash(stateObject.CodeHash()))
+	size, err := s.db.ContractCodeSize(stateObject.addrHash, common.BytesToHash(stateObject.CodeHash()))
 	if err != nil {
-		self.setError(err)
+		s.setError(err)
 	}
 	return size
 }
 
-func (self *StateDB) GetCodeHash(addr common.Address) common.Hash {
+func (s *StateDB) GetCodeHash(addr common.Address) common.Hash {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject == nil {
 		return common.Hash{}
 	}
@@ -282,25 +282,25 @@ func (self *StateDB) GetCodeHash(addr common.Address) common.Hash {
 }
 
 // GetState retrieves a value from the given account's storage trie.
-func (self *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash {
+func (s *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
-		return stateObject.GetState(self.db, hash)
+		return stateObject.GetState(s.db, hash)
 	}
 	return common.Hash{}
 }
 
 // GetProof returns the MerkleProof for a given Account
-func (self *StateDB) GetProof(a common.Address) ([][]byte, error) {
+func (s *StateDB) GetProof(a common.Address) ([][]byte, error) {
 	var proof proofList
-	err := self.trie.Prove(crypto.Keccak256(a.Bytes()), 0, &proof)
+	err := s.trie.Prove(crypto.Keccak256(a.Bytes()), 0, &proof)
 	return [][]byte(proof), err
 }
 
 // GetProof returns the StorageProof for given key
-func (self *StateDB) GetStorageProof(a common.Address, key common.Hash) ([][]byte, error) {
+func (s *StateDB) GetStorageProof(a common.Address, key common.Hash) ([][]byte, error) {
 	var proof proofList
-	trie := self.StorageTrie(a)
+	trie := s.StorageTrie(a)
 	if trie == nil {
 		return proof, errors.New("storage trie for requested address does not exist")
 	}
@@ -309,32 +309,32 @@ func (self *StateDB) GetStorageProof(a common.Address, key common.Hash) ([][]byt
 }
 
 // GetCommittedState retrieves a value from the given account's committed storage trie.
-func (self *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash {
+func (s *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
-		return stateObject.GetCommittedState(self.db, hash)
+		return stateObject.GetCommittedState(s.db, hash)
 	}
 	return common.Hash{}
 }
 
 // Database retrieves the low level database supporting the lower level trie ops.
-func (self *StateDB) Database() Database {
+func (s *StateDB) Database() Database {
-	return self.db
+	return s.db
 }
 
 // StorageTrie returns the storage trie of an account.
 // The return value is a copy and is nil for non-existent accounts.
-func (self *StateDB) StorageTrie(addr common.Address) Trie {
+func (s *StateDB) StorageTrie(addr common.Address) Trie {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject == nil {
 		return nil
 	}
-	cpy := stateObject.deepCopy(self)
+	cpy := stateObject.deepCopy(s)
-	return cpy.updateTrie(self.db)
+	return cpy.updateTrie(s.db)
 }
 
-func (self *StateDB) HasSuicided(addr common.Address) bool {
+func (s *StateDB) HasSuicided(addr common.Address) bool {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return stateObject.suicided
 	}
@@ -346,53 +346,53 @@ func (self *StateDB) HasSuicided(addr common.Address) bool {
  */
 
 // AddBalance adds amount to the account associated with addr.
-func (self *StateDB) AddBalance(addr common.Address, amount *big.Int) {
+func (s *StateDB) AddBalance(addr common.Address, amount *big.Int) {
-	stateObject := self.GetOrNewStateObject(addr)
+	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
 		stateObject.AddBalance(amount)
 	}
 }
 
 // SubBalance subtracts amount from the account associated with addr.
-func (self *StateDB) SubBalance(addr common.Address, amount *big.Int) {
+func (s *StateDB) SubBalance(addr common.Address, amount *big.Int) {
-	stateObject := self.GetOrNewStateObject(addr)
+	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
 		stateObject.SubBalance(amount)
 	}
 }
 
-func (self *StateDB) SetBalance(addr common.Address, amount *big.Int) {
+func (s *StateDB) SetBalance(addr common.Address, amount *big.Int) {
-	stateObject := self.GetOrNewStateObject(addr)
+	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
 		stateObject.SetBalance(amount)
 	}
 }
 
-func (self *StateDB) SetNonce(addr common.Address, nonce uint64) {
+func (s *StateDB) SetNonce(addr common.Address, nonce uint64) {
-	stateObject := self.GetOrNewStateObject(addr)
+	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
 		stateObject.SetNonce(nonce)
 	}
 }
 
-func (self *StateDB) SetCode(addr common.Address, code []byte) {
+func (s *StateDB) SetCode(addr common.Address, code []byte) {
-	stateObject := self.GetOrNewStateObject(addr)
+	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
 		stateObject.SetCode(crypto.Keccak256Hash(code), code)
 	}
 }
 
-func (self *StateDB) SetState(addr common.Address, key, value common.Hash) {
+func (s *StateDB) SetState(addr common.Address, key, value common.Hash) {
-	stateObject := self.GetOrNewStateObject(addr)
+	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
-		stateObject.SetState(self.db, key, value)
+		stateObject.SetState(s.db, key, value)
 	}
 }
 
 // SetStorage replaces the entire storage for the specified account with given
 // storage. This function should only be used for debugging.
-func (self *StateDB) SetStorage(addr common.Address, storage map[common.Hash]common.Hash) {
+func (s *StateDB) SetStorage(addr common.Address, storage map[common.Hash]common.Hash) {
-	stateObject := self.GetOrNewStateObject(addr)
+	stateObject := s.GetOrNewStateObject(addr)
 	if stateObject != nil {
 		stateObject.SetStorage(storage)
 	}
@@ -403,12 +403,12 @@ func (self *StateDB) SetStorage(addr common.Address, storage map[common.Hash]com
 //
 // The account's state object is still available until the state is committed,
 // getStateObject will return a non-nil account after Suicide.
-func (self *StateDB) Suicide(addr common.Address) bool {
+func (s *StateDB) Suicide(addr common.Address) bool {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject == nil {
 		return false
 	}
-	self.journal.append(suicideChange{
+	s.journal.append(suicideChange{
 		account:     &addr,
 		prev:        stateObject.suicided,
 		prevbalance: new(big.Int).Set(stateObject.Balance()),
@@ -462,7 +462,7 @@ func (s *StateDB) getStateObject(addr common.Address) *stateObject {
 
 // getDeletedStateObject is similar to getStateObject, but instead of returning
 // nil for a deleted state object, it returns the actual object with the deleted
-// flag set. This is needed by the state journal to revert to the correct self-
+// flag set. This is needed by the state journal to revert to the correct s-
 // destructed object instead of wiping all knowledge about the state object.
 func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
 	// Prefer live objects if any is available
@@ -490,32 +490,32 @@ func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
 	return obj
 }
 
-func (self *StateDB) setStateObject(object *stateObject) {
+func (s *StateDB) setStateObject(object *stateObject) {
-	self.stateObjects[object.Address()] = object
+	s.stateObjects[object.Address()] = object
 }
 
 // Retrieve a state object or create a new state object if nil.
-func (self *StateDB) GetOrNewStateObject(addr common.Address) *stateObject {
+func (s *StateDB) GetOrNewStateObject(addr common.Address) *stateObject {
-	stateObject := self.getStateObject(addr)
+	stateObject := s.getStateObject(addr)
 	if stateObject == nil {
-		stateObject, _ = self.createObject(addr)
+		stateObject, _ = s.createObject(addr)
 	}
 	return stateObject
 }
 
 // createObject creates a new state object. If there is an existing account with
 // the given address, it is overwritten and returned as the second return value.
-func (self *StateDB) createObject(addr common.Address) (newobj, prev *stateObject) {
+func (s *StateDB) createObject(addr common.Address) (newobj, prev *stateObject) {
-	prev = self.getDeletedStateObject(addr) // Note, prev might have been deleted, we need that!
+	prev = s.getDeletedStateObject(addr) // Note, prev might have been deleted, we need that!
 
-	newobj = newObject(self, addr, Account{})
+	newobj = newObject(s, addr, Account{})
 	newobj.setNonce(0) // sets the object to dirty
 	if prev == nil {
-		self.journal.append(createObjectChange{account: &addr})
+		s.journal.append(createObjectChange{account: &addr})
 	} else {
-		self.journal.append(resetObjectChange{prev: prev})
+		s.journal.append(resetObjectChange{prev: prev})
 	}
-	self.setStateObject(newobj)
+	s.setStateObject(newobj)
 	return newobj, prev
 }
 
@@ -529,8 +529,8 @@ func (self *StateDB) createObject(addr common.Address) (newobj, prev *stateObjec
 //   2. tx_create(sha(account ++ nonce)) (note that this gets the address of 1)
 //
 // Carrying over the balance ensures that Ether doesn't disappear.
-func (self *StateDB) CreateAccount(addr common.Address) {
+func (s *StateDB) CreateAccount(addr common.Address) {
-	newObj, prev := self.createObject(addr)
+	newObj, prev := s.createObject(addr)
 	if prev != nil {
 		newObj.setBalance(prev.data.Balance)
 	}
@@ -567,27 +567,27 @@ func (db *StateDB) ForEachStorage(addr common.Address, cb func(key, value common
 
 // Copy creates a deep, independent copy of the state.
 // Snapshots of the copied state cannot be applied to the copy.
-func (self *StateDB) Copy() *StateDB {
+func (s *StateDB) Copy() *StateDB {
 	// Copy all the basic fields, initialize the memory ones
 	state := &StateDB{
-		db:                  self.db,
+		db:                  s.db,
-		trie:                self.db.CopyTrie(self.trie),
+		trie:                s.db.CopyTrie(s.trie),
-		stateObjects:        make(map[common.Address]*stateObject, len(self.journal.dirties)),
+		stateObjects:        make(map[common.Address]*stateObject, len(s.journal.dirties)),
-		stateObjectsPending: make(map[common.Address]struct{}, len(self.stateObjectsPending)),
+		stateObjectsPending: make(map[common.Address]struct{}, len(s.stateObjectsPending)),
-		stateObjectsDirty:   make(map[common.Address]struct{}, len(self.journal.dirties)),
+		stateObjectsDirty:   make(map[common.Address]struct{}, len(s.journal.dirties)),
-		refund:              self.refund,
+		refund:              s.refund,
-		logs:                make(map[common.Hash][]*types.Log, len(self.logs)),
+		logs:                make(map[common.Hash][]*types.Log, len(s.logs)),
-		logSize:             self.logSize,
+		logSize:             s.logSize,
-		preimages:           make(map[common.Hash][]byte, len(self.preimages)),
+		preimages:           make(map[common.Hash][]byte, len(s.preimages)),
 		journal:             newJournal(),
 	}
 	// Copy the dirty states, logs, and preimages
-	for addr := range self.journal.dirties {
+	for addr := range s.journal.dirties {
 		// As documented [here](https://github.com/ethereum/go-ethereum/pull/16485#issuecomment-380438527),
 		// and in the Finalise-method, there is a case where an object is in the journal but not
 		// in the stateObjects: OOG after touch on ripeMD prior to Byzantium. Thus, we need to check for
 		// nil
-		if object, exist := self.stateObjects[addr]; exist {
+		if object, exist := s.stateObjects[addr]; exist {
 			// Even though the original object is dirty, we are not copying the journal,
 			// so we need to make sure that anyside effect the journal would have caused
 			// during a commit (or similar op) is already applied to the copy.
@@ -600,19 +600,19 @@ func (self *StateDB) Copy() *StateDB {
 	// Above, we don't copy the actual journal. This means that if the copy is copied, the
 	// loop above will be a no-op, since the copy's journal is empty.
 	// Thus, here we iterate over stateObjects, to enable copies of copies
-	for addr := range self.stateObjectsPending {
+	for addr := range s.stateObjectsPending {
 		if _, exist := state.stateObjects[addr]; !exist {
-			state.stateObjects[addr] = self.stateObjects[addr].deepCopy(state)
+			state.stateObjects[addr] = s.stateObjects[addr].deepCopy(state)
 		}
 		state.stateObjectsPending[addr] = struct{}{}
 	}
-	for addr := range self.stateObjectsDirty {
+	for addr := range s.stateObjectsDirty {
 		if _, exist := state.stateObjects[addr]; !exist {
-			state.stateObjects[addr] = self.stateObjects[addr].deepCopy(state)
+			state.stateObjects[addr] = s.stateObjects[addr].deepCopy(state)
 		}
 		state.stateObjectsDirty[addr] = struct{}{}
 	}
-	for hash, logs := range self.logs {
+	for hash, logs := range s.logs {
 		cpy := make([]*types.Log, len(logs))
 		for i, l := range logs {
 			cpy[i] = new(types.Log)
@@ -620,42 +620,42 @@ func (self *StateDB) Copy() *StateDB {
 		}
 		state.logs[hash] = cpy
 	}
-	for hash, preimage := range self.preimages {
+	for hash, preimage := range s.preimages {
 		state.preimages[hash] = preimage
 	}
 	return state
 }
 
 // Snapshot returns an identifier for the current revision of the state.
-func (self *StateDB) Snapshot() int {
+func (s *StateDB) Snapshot() int {
-	id := self.nextRevisionId
+	id := s.nextRevisionId
-	self.nextRevisionId++
+	s.nextRevisionId++
-	self.validRevisions = append(self.validRevisions, revision{id, self.journal.length()})
+	s.validRevisions = append(s.validRevisions, revision{id, s.journal.length()})
 	return id
 }
 
 // RevertToSnapshot reverts all state changes made since the given revision.
-func (self *StateDB) RevertToSnapshot(revid int) {
+func (s *StateDB) RevertToSnapshot(revid int) {
 	// Find the snapshot in the stack of valid snapshots.
-	idx := sort.Search(len(self.validRevisions), func(i int) bool {
+	idx := sort.Search(len(s.validRevisions), func(i int) bool {
-		return self.validRevisions[i].id >= revid
+		return s.validRevisions[i].id >= revid
 	})
-	if idx == len(self.validRevisions) || self.validRevisions[idx].id != revid {
+	if idx == len(s.validRevisions) || s.validRevisions[idx].id != revid {
 		panic(fmt.Errorf("revision id %v cannot be reverted", revid))
 	}
-	snapshot := self.validRevisions[idx].journalIndex
+	snapshot := s.validRevisions[idx].journalIndex
 
 	// Replay the journal to undo changes and remove invalidated snapshots
-	self.journal.revert(self, snapshot)
+	s.journal.revert(s, snapshot)
-	self.validRevisions = self.validRevisions[:idx]
+	s.validRevisions = s.validRevisions[:idx]
 }
 
 // GetRefund returns the current value of the refund counter.
-func (self *StateDB) GetRefund() uint64 {
+func (s *StateDB) GetRefund() uint64 {
-	return self.refund
+	return s.refund
 }
 
-// Finalise finalises the state by removing the self destructed objects and clears
+// Finalise finalises the state by removing the s destructed objects and clears
 // the journal as well as the refunds. Finalise, however, will not push any updates
 // into the tries just yet. Only IntermediateRoot or Commit will do that.
 func (s *StateDB) Finalise(deleteEmptyObjects bool) {
@@ -710,10 +710,10 @@ func (s *StateDB) IntermediateRoot(deleteEmptyObjects bool) common.Hash {
 
 // Prepare sets the current transaction hash and index and block hash which is
 // used when the EVM emits new state logs.
-func (self *StateDB) Prepare(thash, bhash common.Hash, ti int) {
+func (s *StateDB) Prepare(thash, bhash common.Hash, ti int) {
-	self.thash = thash
+	s.thash = thash
-	self.bhash = bhash
+	s.bhash = bhash
-	self.txIndex = ti
+	s.txIndex = ti
 }
 
 func (s *StateDB) clearJournalAndRefund() {

core/state/statedb_test.go

@@ -29,8 +29,6 @@ import (
 	"testing"
 	"testing/quick"
 
-	"gopkg.in/check.v1"
-
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/types"
@@ -458,7 +456,8 @@ func (test *snapshotTest) checkEqual(state, checkstate *StateDB) error {
 	return nil
 }
 
-func (s *StateSuite) TestTouchDelete(c *check.C) {
+func TestTouchDelete(t *testing.T) {
+	s := newStateTest()
 	s.state.GetOrNewStateObject(common.Address{})
 	root, _ := s.state.Commit(false)
 	s.state.Reset(root)
@@ -467,11 +466,11 @@ func (s *StateSuite) TestTouchDelete(c *check.C) {
 	s.state.AddBalance(common.Address{}, new(big.Int))
 
 	if len(s.state.journal.dirties) != 1 {
-		c.Fatal("expected one dirty state object")
+		t.Fatal("expected one dirty state object")
 	}
 	s.state.RevertToSnapshot(snapshot)
 	if len(s.state.journal.dirties) != 0 {
-		c.Fatal("expected no dirty state object")
+		t.Fatal("expected no dirty state object")
 	}
 }
 

go.mod

@@ -59,7 +59,6 @@ require (
 	golang.org/x/sync v0.0.0-20181108010431-42b317875d0f
 	golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7
 	golang.org/x/text v0.3.2
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127
 	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce
 	gopkg.in/olebedev/go-duktape.v3 v3.0.0-20190213234257-ec84240a7772
 	gopkg.in/sourcemap.v1 v1.0.5 // indirect