Minor.

pavel-raykov · pavel-raykov · commit b8e84cfa0304 · 2026-05-18T11:47:08.000+02:00
diff --git a/pkg/utils/hex/plainhex.go b/pkg/utils/hex/plainhex.go
@@ -31,7 +31,10 @@ func (b *PlainHexBytes) UnmarshalJSON(input []byte) (err error) {
 		return &json.UnmarshalTypeError{Value: "non-string", Type: reflect.TypeOf((PlainHexBytes)(nil))}
 	}
 	err = b.UnmarshalText(input[1 : len(input)-1])
-	return fmt.Errorf("UnmarshalJSON failed: %w", err)
+	if err != nil {
+		err = fmt.Errorf("UnmarshalJSON failed: %w", err)
+	}
+	return err
 }
 
 func isString(input []byte) bool {
diff --git a/pkg/utils/hex/plainhex_test.go b/pkg/utils/hex/plainhex_test.go
@@ -24,7 +24,7 @@ var (
 	unmarshalBytesTests = []unmarshalTest{
 		// invalid encoding
 		{input: "", wantErr: "unexpected end of JSON input"},
-		{input: "null", wantErr: "json: cannot unmarshal non-string into Go value of type utils.PlainHexBytes"},
+		{input: "null", wantErr: "json: cannot unmarshal non-string into Go value of type hex.PlainHexBytes"},
 		{input: `"null"`, wantErr: "UnmarshalJSON failed: UnmarshalText failed: encoding/hex: invalid byte: U+006E 'n'"},
 		{input: `"0x"`, wantErr: "UnmarshalJSON failed: UnmarshalText failed: encoding/hex: invalid byte: U+0078 'x'"},
 		{input: `"0X"`, wantErr: "UnmarshalJSON failed: UnmarshalText failed: encoding/hex: invalid byte: U+0058 'X'"},

Original file line number	Diff line number	Diff line change
`@@ -31,7 +31,10 @@ func (b *PlainHexBytes) UnmarshalJSON(input []byte) (err error) {`
`31`	`31`	`return &json.UnmarshalTypeError{Value: "non-string", Type: reflect.TypeOf((PlainHexBytes)(nil))}`
`32`	`32`	`}`
`33`	`33`	`err = b.UnmarshalText(input[1 : len(input)-1])`
`34`		`- return fmt.Errorf("UnmarshalJSON failed: %w", err)`
	`34`	`+ if err != nil {`
	`35`	`+ err = fmt.Errorf("UnmarshalJSON failed: %w", err)`
	`36`	`+ }`
	`37`	`+ return err`
`35`	`38`	`}`
`36`	`39`
`37`	`40`	`func isString(input []byte) bool {`