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stackitem: serialize/deserialize pointers, fix #2815

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They of course can't be serialized, but in protected mode we still need to
handle them somehow.
This commit is contained in:
Roman Khimov 2022-11-19 23:13:59 +03:00
parent 286f40b828
commit 9ba18b5dfa
2 changed files with 31 additions and 0 deletions
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14
pkg/vm/stackitem/serialization.go
View file

@ -7,6 +7,7 @@ import (
"github.com/nspcc-dev/neo-go/pkg/encoding/bigint"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/util"
)
// MaxDeserialized is the maximum number one deserialized item can contain
@ -168,6 +169,13 @@ func (w *SerializationContext) serialize(item Item) error {
} else {
return fmt.Errorf("%w: Interop", ErrUnserializable)
}
case *Pointer:
if w.allowInvalid {
w.data = append(w.data, byte(PointerT))
w.appendVarUint(uint64(t.pos))
} else {
return fmt.Errorf("%w: Pointer", ErrUnserializable)
}
case *Array:
w.data = append(w.data, byte(ArrayT))
if err := w.writeArray(item, t.value, start); err != nil {
@ -311,6 +319,12 @@ func (r *deserContext) decodeBinary() Item {
return NewInterop(nil)
}
fallthrough
case PointerT:
if r.allowInvalid {
pos := int(r.ReadVarUint())
return NewPointerWithHash(pos, nil, util.Uint160{})
}
fallthrough
default:
if t == InvalidT && r.allowInvalid {
return nil

17
pkg/vm/stackitem/serialization_test.go
View file

@ -76,6 +76,7 @@ func TestSerialize(t *testing.T) {
})
t.Run("invalid", func(t *testing.T) {
testSerialize(t, ErrUnserializable, NewInterop(42))
testSerialize(t, ErrUnserializable, NewPointer(42, []byte{}))
testSerialize(t, ErrUnserializable, nil)
t.Run("protected interop", func(t *testing.T) {
@ -93,6 +94,22 @@ func TestSerialize(t *testing.T) {
require.NoError(t, r.Err)
require.IsType(t, (*Interop)(nil), item)
})
t.Run("protected pointer", func(t *testing.T) {
w := io.NewBufBinWriter()
EncodeBinaryProtected(NewPointer(42, []byte{}), w.BinWriter)
require.NoError(t, w.Err)
data := w.Bytes()
r := io.NewBinReaderFromBuf(data)
DecodeBinary(r)
require.Error(t, r.Err)
r = io.NewBinReaderFromBuf(data)
item := DecodeBinaryProtected(r)
require.NoError(t, r.Err)
require.IsType(t, (*Pointer)(nil), item)
require.Equal(t, 42, item.Value())
})
t.Run("protected nil", func(t *testing.T) {
w := io.NewBufBinWriter()
EncodeBinaryProtected(nil, w.BinWriter)