all: remove redundant conversions and import names

accounts/abi/reflect_test.go

@@ -202,12 +202,12 @@ func TestConvertType(t *testing.T) {
 	fields = append(fields, reflect.StructField{
 		Name: "X",
 		Type: reflect.TypeOf(new(big.Int)),
-		Tag:  reflect.StructTag("json:\"" + "x" + "\""),
+		Tag:  "json:\"" + "x" + "\"",
 	})
 	fields = append(fields, reflect.StructField{
 		Name: "Y",
 		Type: reflect.TypeOf(new(big.Int)),
-		Tag:  reflect.StructTag("json:\"" + "y" + "\""),
+		Tag:  "json:\"" + "y" + "\"",
 	})
 	val := reflect.New(reflect.StructOf(fields))
 	val.Elem().Field(0).Set(reflect.ValueOf(big.NewInt(1)))

accounts/abi/type_test.go

@@ -255,7 +255,7 @@ func TestTypeCheck(t *testing.T) {
 		{"bytes", nil, [2]byte{0, 1}, "abi: cannot use array as type slice as argument"},
 		{"bytes", nil, common.Hash{1}, "abi: cannot use array as type slice as argument"},
 		{"string", nil, "hello world", ""},
-		{"string", nil, string(""), ""},
+		{"string", nil, "", ""},
 		{"string", nil, []byte{}, "abi: cannot use slice as type string as argument"},
 		{"bytes32[]", nil, [][32]byte{{}}, ""},
 		{"function", nil, [24]byte{}, ""},

accounts/accounts.go

@@ -21,7 +21,7 @@ import (
 	"fmt"
 	"math/big"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/event"

accounts/keystore/passphrase.go

@@ -230,7 +230,7 @@ func DecryptKey(keyjson []byte, auth string) (*Key, error) {
 	key := crypto.ToECDSAUnsafe(keyBytes)
 
 	return &Key{
-		Id:         uuid.UUID(keyId),
+		Id:         keyId,
 		Address:    crypto.PubkeyToAddress(key.PublicKey),
 		PrivateKey: key,
 	}, nil

accounts/keystore/wallet.go

@@ -19,7 +19,7 @@ package keystore
 import (
 	"math/big"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"

accounts/scwallet/wallet.go

@@ -33,7 +33,7 @@ import (
 	"sync"
 	"time"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"

accounts/usbwallet/wallet.go

@@ -25,7 +25,7 @@ import (
 	"sync"
 	"time"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"

cmd/clef/main.go

@@ -54,7 +54,7 @@ import (
 	"github.com/ethereum/go-ethereum/signer/rules"
 	"github.com/ethereum/go-ethereum/signer/storage"
 
-	colorable "github.com/mattn/go-colorable"
+	"github.com/mattn/go-colorable"
 	"github.com/mattn/go-isatty"
 	"gopkg.in/urfave/cli.v1"
 )

cmd/devp2p/dnscmd.go

@@ -30,7 +30,7 @@ import (
 	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/p2p/dnsdisc"
 	"github.com/ethereum/go-ethereum/p2p/enode"
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 var (

cmd/evm/compiler.go

@@ -23,7 +23,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/cmd/evm/internal/compiler"
 
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 var compileCommand = cli.Command{

cmd/evm/disasm.go

@@ -23,7 +23,7 @@ import (
 	"strings"
 
 	"github.com/ethereum/go-ethereum/core/asm"
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 var disasmCommand = cli.Command{

cmd/evm/runner.go

@@ -38,7 +38,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/vm/runtime"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/params"
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 var runCommand = cli.Command{

cmd/evm/staterunner.go

@@ -28,7 +28,7 @@ import (
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/tests"
 
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 var stateTestCommand = cli.Command{

cmd/geth/config.go

@@ -24,7 +24,7 @@ import (
 	"reflect"
 	"unicode"
 
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/eth"

cmd/geth/main.go

@@ -42,7 +42,7 @@ import (
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/node"
 	gopsutil "github.com/shirou/gopsutil/mem"
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 const (

cmd/geth/usage.go

@@ -25,7 +25,7 @@ import (
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/internal/debug"
 	"github.com/ethereum/go-ethereum/internal/flags"
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 // AppHelpFlagGroups is the application flags, grouped by functionality.

cmd/puppeth/genesis.go

@@ -152,7 +152,7 @@ func newAlethGenesisSpec(network string, genesis *core.Genesis) (*alethGenesisSp
 	spec.Genesis.Author = genesis.Coinbase
 	spec.Genesis.Timestamp = (hexutil.Uint64)(genesis.Timestamp)
 	spec.Genesis.ParentHash = genesis.ParentHash
-	spec.Genesis.ExtraData = (hexutil.Bytes)(genesis.ExtraData)
+	spec.Genesis.ExtraData = genesis.ExtraData
 	spec.Genesis.GasLimit = (hexutil.Uint64)(genesis.GasLimit)
 
 	for address, account := range genesis.Alloc {
@@ -430,7 +430,7 @@ func newParityChainSpec(network string, genesis *core.Genesis, bootnodes []strin
 	spec.Genesis.Author = genesis.Coinbase
 	spec.Genesis.Timestamp = (hexutil.Uint64)(genesis.Timestamp)
 	spec.Genesis.ParentHash = genesis.ParentHash
-	spec.Genesis.ExtraData = (hexutil.Bytes)(genesis.ExtraData)
+	spec.Genesis.ExtraData = genesis.ExtraData
 	spec.Genesis.GasLimit = (hexutil.Uint64)(genesis.GasLimit)
 
 	spec.Accounts = make(map[common.UnprefixedAddress]*parityChainSpecAccount)

cmd/utils/flags.go

@@ -64,7 +64,7 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/netutil"
 	"github.com/ethereum/go-ethereum/params"
 	pcsclite "github.com/gballet/go-libpcsclite"
-	cli "gopkg.in/urfave/cli.v1"
+	"gopkg.in/urfave/cli.v1"
 )
 
 func init() {

common/hexutil/json_test.go

@@ -88,7 +88,7 @@ func TestUnmarshalBytes(t *testing.T) {
 		if !checkError(t, test.input, err, test.wantErr) {
 			continue
 		}
-		if !bytes.Equal(test.want.([]byte), []byte(v)) {
+		if !bytes.Equal(test.want.([]byte), v) {
 			t.Errorf("input %s: value mismatch: got %x, want %x", test.input, &v, test.want)
 			continue
 		}

consensus/ethash/ethash.go

@@ -33,7 +33,7 @@ import (
 	"time"
 	"unsafe"
 
-	mmap "github.com/edsrzf/mmap-go"
+	"github.com/edsrzf/mmap-go"
 	"github.com/ethereum/go-ethereum/consensus"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/metrics"

contracts/checkpointoracle/oracle.go

@@ -65,7 +65,7 @@ func (oracle *CheckpointOracle) LookupCheckpointEvents(blockLogs [][]*types.Log,
 			if err != nil {
 				continue
 			}
-			if event.Index == section && common.Hash(event.CheckpointHash) == hash {
+			if event.Index == section && event.CheckpointHash == hash {
 				votes = append(votes, event)
 			}
 		}

core/state/statedb.go

@@ -318,7 +318,7 @@ func (s *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash {
 func (s *StateDB) GetProof(a common.Address) ([][]byte, error) {
 	var proof proofList
 	err := s.trie.Prove(crypto.Keccak256(a.Bytes()), 0, &proof)
-	return [][]byte(proof), err
+	return proof, err
 }
 
 // GetStorageProof returns the StorageProof for given key
@@ -329,7 +329,7 @@ func (s *StateDB) GetStorageProof(a common.Address, key common.Hash) ([][]byte,
 		return proof, errors.New("storage trie for requested address does not exist")
 	}
 	err := trie.Prove(crypto.Keccak256(key.Bytes()), 0, &proof)
-	return [][]byte(proof), err
+	return proof, err
 }
 
 // GetCommittedState retrieves a value from the given account's committed storage trie.

core/tx_pool_test.go

@@ -1139,7 +1139,7 @@ func TestTransactionAllowedTxSize(t *testing.T) {
 		t.Fatalf("expected rejection on slightly oversize transaction")
 	}
 	// Try adding a transaction of random not allowed size
-	if err := pool.addRemoteSync(pricedDataTransaction(2, pool.currentMaxGas, big.NewInt(1), key, dataSize+1+uint64(rand.Intn(int(10*txMaxSize))))); err == nil {
+	if err := pool.addRemoteSync(pricedDataTransaction(2, pool.currentMaxGas, big.NewInt(1), key, dataSize+1+uint64(rand.Intn(10*txMaxSize)))); err == nil {
 		t.Fatalf("expected rejection on oversize transaction")
 	}
 	// Run some sanity checks on the pool internals

core/vm/evm.go

@@ -525,7 +525,7 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
 // instead of the usual sender-and-nonce-hash as the address where the contract is initialized at.
 func (evm *EVM) Create2(caller ContractRef, code []byte, gas uint64, endowment *big.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
 	codeAndHash := &codeAndHash{code: code}
-	contractAddr = crypto.CreateAddress2(caller.Address(), common.Hash(salt.Bytes32()), codeAndHash.Hash().Bytes())
+	contractAddr = crypto.CreateAddress2(caller.Address(), salt.Bytes32(), codeAndHash.Hash().Bytes())
 	return evm.create(caller, codeAndHash, gas, endowment, contractAddr)
 }
 

core/vm/gas_table.go

@@ -96,7 +96,7 @@ var (
 func gasSStore(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
 	var (
 		y, x    = stack.Back(1), stack.Back(0)
-		current = evm.StateDB.GetState(contract.Address(), common.Hash(x.Bytes32()))
+		current = evm.StateDB.GetState(contract.Address(), x.Bytes32())
 	)
 	// The legacy gas metering only takes into consideration the current state
 	// Legacy rules should be applied if we are in Petersburg (removal of EIP-1283)
@@ -135,7 +135,7 @@ func gasSStore(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySi
 	if current == value { // noop (1)
 		return params.NetSstoreNoopGas, nil
 	}
-	original := evm.StateDB.GetCommittedState(contract.Address(), common.Hash(x.Bytes32()))
+	original := evm.StateDB.GetCommittedState(contract.Address(), x.Bytes32())
 	if original == current {
 		if original == (common.Hash{}) { // create slot (2.1.1)
 			return params.NetSstoreInitGas, nil
@@ -183,14 +183,14 @@ func gasSStoreEIP2200(evm *EVM, contract *Contract, stack *Stack, mem *Memory, m
 	// Gas sentry honoured, do the actual gas calculation based on the stored value
 	var (
 		y, x    = stack.Back(1), stack.Back(0)
-		current = evm.StateDB.GetState(contract.Address(), common.Hash(x.Bytes32()))
+		current = evm.StateDB.GetState(contract.Address(), x.Bytes32())
 	)
 	value := common.Hash(y.Bytes32())
 
 	if current == value { // noop (1)
 		return params.SloadGasEIP2200, nil
 	}
-	original := evm.StateDB.GetCommittedState(contract.Address(), common.Hash(x.Bytes32()))
+	original := evm.StateDB.GetCommittedState(contract.Address(), x.Bytes32())
 	if original == current {
 		if original == (common.Hash{}) { // create slot (2.1.1)
 			return params.SstoreSetGasEIP2200, nil

core/vm/instructions.go

@@ -341,7 +341,7 @@ func opReturnDataCopy(pc *uint64, interpreter *EVMInterpreter, callContext *call
 
 func opExtCodeSize(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) {
 	slot := callContext.stack.peek()
-	slot.SetUint64(uint64(interpreter.evm.StateDB.GetCodeSize(common.Address(slot.Bytes20()))))
+	slot.SetUint64(uint64(interpreter.evm.StateDB.GetCodeSize(slot.Bytes20())))
 	return nil, nil
 }
 
@@ -517,7 +517,7 @@ func opSstore(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]
 	loc := callContext.stack.pop()
 	val := callContext.stack.pop()
 	interpreter.evm.StateDB.SetState(callContext.contract.Address(),
-		common.Hash(loc.Bytes32()), common.Hash(val.Bytes32()))
+		loc.Bytes32(), val.Bytes32())
 	return nil, nil
 }
 
@@ -817,7 +817,7 @@ func opStop(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]by
 func opSuicide(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) {
 	beneficiary := callContext.stack.pop()
 	balance := interpreter.evm.StateDB.GetBalance(callContext.contract.Address())
-	interpreter.evm.StateDB.AddBalance(common.Address(beneficiary.Bytes20()), balance)
+	interpreter.evm.StateDB.AddBalance(beneficiary.Bytes20(), balance)
 	interpreter.evm.StateDB.Suicide(callContext.contract.Address())
 	return nil, nil
 }
@@ -832,7 +832,7 @@ func makeLog(size int) executionFunc {
 		mStart, mSize := stack.pop(), stack.pop()
 		for i := 0; i < size; i++ {
 			addr := stack.pop()
-			topics[i] = common.Hash(addr.Bytes32())
+			topics[i] = addr.Bytes32()
 		}
 
 		d := callContext.memory.GetCopy(int64(mStart.Uint64()), int64(mSize.Uint64()))

core/vm/operations_acl.go

@@ -73,7 +73,7 @@ func gasSStoreEIP2929(evm *EVM, contract *Contract, stack *Stack, mem *Memory, m
 		//		return params.SloadGasEIP2200, nil
 		return cost + WarmStorageReadCostEIP2929, nil // SLOAD_GAS
 	}
-	original := evm.StateDB.GetCommittedState(contract.Address(), common.Hash(x.Bytes32()))
+	original := evm.StateDB.GetCommittedState(contract.Address(), x.Bytes32())
 	if original == current {
 		if original == (common.Hash{}) { // create slot (2.1.1)
 			return cost + params.SstoreSetGasEIP2200, nil

eth/downloader/api.go

@@ -20,7 +20,7 @@ import (
 	"context"
 	"sync"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/rpc"
 )

eth/filters/api.go

@@ -25,7 +25,7 @@ import (
 	"sync"
 	"time"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/types"
@@ -292,7 +292,7 @@ func (api *PublicFilterAPI) NewFilter(crit FilterCriteria) (rpc.ID, error) {
 	logs := make(chan []*types.Log)
 	logsSub, err := api.events.SubscribeLogs(ethereum.FilterQuery(crit), logs)
 	if err != nil {
-		return rpc.ID(""), err
+		return "", err
 	}
 
 	api.filtersMu.Lock()

eth/filters/filter_system.go

@@ -24,7 +24,7 @@ import (
 	"sync"
 	"time"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/rawdb"

eth/filters/filter_system_test.go

@@ -25,7 +25,7 @@ import (
 	"testing"
 	"time"
 
-	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/core"

eth/tracers/tracer.go

@@ -30,7 +30,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/log"
-	duktape "gopkg.in/olebedev/go-duktape.v3"
+	"gopkg.in/olebedev/go-duktape.v3"
 )
 
 // bigIntegerJS is the minified version of https://github.com/peterolson/BigInteger.js.

event/event_test.go

@@ -29,7 +29,7 @@ func TestSubCloseUnsub(t *testing.T) {
 	// the point of this test is **not** to panic
 	var mux TypeMux
 	mux.Stop()
-	sub := mux.Subscribe(int(0))
+	sub := mux.Subscribe(0)
 	sub.Unsubscribe()
 }