common, common/hexutil: use reflect.TypeFor (#32321)

Author: cuiweixie

common/hexutil/json.go

@@ -28,11 +28,11 @@ import (
 )
 
 var (
-	bytesT  = reflect.TypeOf(Bytes(nil))
-	bigT    = reflect.TypeOf((*Big)(nil))
-	uintT   = reflect.TypeOf(Uint(0))
-	uint64T = reflect.TypeOf(Uint64(0))
-	u256T   = reflect.TypeOf((*uint256.Int)(nil))
+	bytesT  = reflect.TypeFor[Bytes]()
+	bigT    = reflect.TypeFor[*Big]()
+	uintT   = reflect.TypeFor[Uint]()
+	uint64T = reflect.TypeFor[Uint64]()
+	u256T   = reflect.TypeFor[*uint256.Int]()
 )
 
 // Bytes marshals/unmarshals as a JSON string with 0x prefix.

common/types.go

@@ -42,8 +42,8 @@ const (
 )
 
 var (
-	hashT    = reflect.TypeOf(Hash{})
-	addressT = reflect.TypeOf(Address{})
+	hashT    = reflect.TypeFor[Hash]()
+	addressT = reflect.TypeFor[Address]()
 
 	// MaxAddress represents the maximum possible address value.
 	MaxAddress = HexToAddress("0xffffffffffffffffffffffffffffffffffffffff")
@@ -466,7 +466,7 @@ func isString(input []byte) bool {
 // UnmarshalJSON parses a hash in hex syntax.
 func (d *Decimal) UnmarshalJSON(input []byte) error {
 	if !isString(input) {
-		return &json.UnmarshalTypeError{Value: "non-string", Type: reflect.TypeOf(uint64(0))}
+		return &json.UnmarshalTypeError{Value: "non-string", Type: reflect.TypeFor[uint64]()}
 	}
 	if i, err := strconv.ParseUint(string(input[1:len(input)-1]), 10, 64); err == nil {
 		*d = Decimal(i)