all: remove redundant conversions and import names (#21903)

# Conflicts:
#	accounts/accounts.go
#	accounts/keystore/wallet.go
#	accounts/scwallet/wallet.go
#	accounts/usbwallet/wallet.go
#	cmd/clef/main.go
#	cmd/devp2p/dnscmd.go
#	cmd/evm/compiler.go
#	cmd/evm/disasm.go
#	cmd/evm/runner.go
#	cmd/evm/staterunner.go
#	cmd/geth/config.go
#	cmd/geth/main.go
#	cmd/geth/usage.go
#	cmd/utils/flags.go
#	consensus/ethash/ethash.go
#	core/state/statedb.go
#	core/tx_pool_test.go
#	core/vm/evm.go
#	core/vm/gas_table.go
#	core/vm/instructions.go
#	core/vm/operations_acl.go
#	eth/downloader/api.go
#	eth/filters/api.go
#	eth/filters/filter_system.go
#	eth/filters/filter_system_test.go
#	eth/tracers/tracer.go
#	internal/debug/flags.go
#	internal/ethapi/api.go
#	internal/flags/helpers.go
#	miner/unconfirmed_test.go
#	mobile/ethereum.go
#	trie/iterator.go
#	turbo/trie/database.go

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/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

cmd/puppeth/genesis.go

@@ -154,7 +154,7 @@ 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 {
@@ -432,7 +432,7 @@ 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)

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
 		}

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)
 			}
 		}

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()
 }
 

event/feed_test.go

@@ -27,8 +27,8 @@ import (
 func TestFeedPanics(t *testing.T) {
 	{
 		var f Feed
-		f.Send(int(2))
-		want := feedTypeError{op: "Send", got: reflect.TypeOf(uint64(0)), want: reflect.TypeOf(int(0))}
+		f.Send(2)
+		want := feedTypeError{op: "Send", got: reflect.TypeOf(uint64(0)), want: reflect.TypeOf(0)}
 		if err := checkPanic(want, func() { f.Send(uint64(2)) }); err != nil {
 			t.Error(err)
 		}
@@ -37,14 +37,14 @@ func TestFeedPanics(t *testing.T) {
 		var f Feed
 		ch := make(chan int)
 		f.Subscribe(ch)
-		want := feedTypeError{op: "Send", got: reflect.TypeOf(uint64(0)), want: reflect.TypeOf(int(0))}
+		want := feedTypeError{op: "Send", got: reflect.TypeOf(uint64(0)), want: reflect.TypeOf(0)}
 		if err := checkPanic(want, func() { f.Send(uint64(2)) }); err != nil {
 			t.Error(err)
 		}
 	}
 	{
 		var f Feed
-		f.Send(int(2))
+		f.Send(2)
 		want := feedTypeError{op: "Subscribe", got: reflect.TypeOf(make(chan uint64)), want: reflect.TypeOf(make(chan<- int))}
 		if err := checkPanic(want, func() { f.Subscribe(make(chan uint64)) }); err != nil {
 			t.Error(err)
@@ -58,7 +58,7 @@ func TestFeedPanics(t *testing.T) {
 	}
 	{
 		var f Feed
-		if err := checkPanic(errBadChannel, func() { f.Subscribe(int(0)) }); err != nil {
+		if err := checkPanic(errBadChannel, func() { f.Subscribe(0) }); err != nil {
 			t.Error(err)
 		}
 	}

graphql/graphql.go

@@ -79,7 +79,7 @@ func (a *Account) Code(ctx context.Context) (hexutil.Bytes, error) {
 	if err != nil {
 		return hexutil.Bytes{}, err
 	}
-	return hexutil.Bytes(state.GetCode(a.address)), nil
+	return state.GetCode(a.address), nil
 }
 
 func (a *Account) Storage(ctx context.Context, args struct{ Slot common.Hash }) (common.Hash, error) {
@@ -120,7 +120,7 @@ func (l *Log) Topics(ctx context.Context) []common.Hash {
 }
 
 func (l *Log) Data(ctx context.Context) hexutil.Bytes {
-	return hexutil.Bytes(l.log.Data)
+	return l.log.Data
 }
 
 // Transaction represents an Ethereum transaction.
@@ -161,7 +161,7 @@ func (t *Transaction) InputData(ctx context.Context) (hexutil.Bytes, error) {
 	if err != nil || tx == nil {
 		return hexutil.Bytes{}, err
 	}
-	return hexutil.Bytes(tx.Data()), nil
+	return tx.Data(), nil
 }
 
 func (t *Transaction) Gas(ctx context.Context) (hexutil.Uint64, error) {
@@ -414,7 +414,7 @@ func (b *Block) resolveReceipts(ctx context.Context) ([]*types.Receipt, error) {
 		if err != nil {
 			return nil, err
 		}
-		b.receipts = []*types.Receipt(receipts)
+		b.receipts = receipts
 	}
 	return b.receipts, nil
 }
@@ -494,7 +494,7 @@ func (b *Block) Nonce(ctx context.Context) (hexutil.Bytes, error) {
 	if err != nil {
 		return hexutil.Bytes{}, err
 	}
-	return hexutil.Bytes(header.Nonce[:]), nil
+	return header.Nonce[:], nil
 }
 
 func (b *Block) MixHash(ctx context.Context) (common.Hash, error) {
@@ -568,7 +568,7 @@ func (b *Block) ExtraData(ctx context.Context) (hexutil.Bytes, error) {
 	if err != nil {
 		return hexutil.Bytes{}, err
 	}
-	return hexutil.Bytes(header.Extra), nil
+	return header.Extra, nil
 }
 
 func (b *Block) LogsBloom(ctx context.Context) (hexutil.Bytes, error) {
@@ -576,7 +576,7 @@ func (b *Block) LogsBloom(ctx context.Context) (hexutil.Bytes, error) {
 	if err != nil {
 		return hexutil.Bytes{}, err
 	}
-	return hexutil.Bytes(header.Bloom.Bytes()), nil
+	return header.Bloom.Bytes(), nil
 }
 
 func (b *Block) TotalDifficulty(ctx context.Context) (hexutil.Big, error) {
@@ -911,7 +911,7 @@ func (r *Resolver) Block(ctx context.Context, args struct {
 }) (*Block, error) {
 	var block *Block
 	if args.Number != nil {
-		number := rpc.BlockNumber(uint64(*args.Number))
+		number := rpc.BlockNumber(*args.Number)
 		numberOrHash := rpc.BlockNumberOrHashWithNumber(number)
 		block = &Block{
 			backend:      r.backend,

p2p/enode/nodedb.go

@@ -171,7 +171,7 @@ func splitNodeItemKey(key []byte) (id ID, ip net.IP, field string) {
 	}
 	key = key[len(dbDiscoverRoot)+1:]
 	// Split out the IP.
-	ip = net.IP(key[:16])
+	ip = key[:16]
 	if ip4 := ip.To4(); ip4 != nil {
 		ip = ip4
 	}

signer/core/signed_data.go

@@ -506,7 +506,7 @@ func parseBytes(encType interface{}) ([]byte, bool) {
 	case []byte:
 		return v, true
 	case hexutil.Bytes:
-		return []byte(v), true
+		return v, true
 	case string:
 		bytes, err := hexutil.Decode(v)
 		if err != nil {