TrueCloudLab/neoneo-go
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stackitem: introduce Convertible interface

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We have a lot of native contract types that are converted to stack items
before serialization, then deserialized as stack items and converted back to
regular structures. stackitem.Convertible allows to remove a lot of repetitive
io.Serializable code.

This also introduces to/from converter in testserdes which unfortunately
required to change util tests to avoid circular references.
This commit is contained in:
Roman Khimov 2021-07-17 18:37:33 +03:00
parent 2d993d0da5
commit aab18c3083
23 changed files with 223 additions and 339 deletions
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31
pkg/core/state/oracle.go
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@ -5,7 +5,6 @@ import (
"math/big"
"unicode/utf8"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
)
@ -21,28 +20,9 @@ type OracleRequest struct {
UserData []byte
}
// Bytes return o serizalized to a byte-slice.
func (o *OracleRequest) Bytes() []byte {
w := io.NewBufBinWriter()
o.EncodeBinary(w.BinWriter)
return w.Bytes()
}
// EncodeBinary implements io.Serializable.
func (o *OracleRequest) EncodeBinary(w *io.BinWriter) {
stackitem.EncodeBinary(o.toStackItem(), w)
}
// DecodeBinary implements io.Serializable.
func (o *OracleRequest) DecodeBinary(r *io.BinReader) {
item := stackitem.DecodeBinary(r)
if r.Err != nil || item == nil {
return
}
r.Err = o.fromStackItem(item)
}
func (o *OracleRequest) toStackItem() stackitem.Item {
// ToStackItem implements stackitem.Convertible interface. It never returns an
// error.
func (o *OracleRequest) ToStackItem() (stackitem.Item, error) {
filter := stackitem.Item(stackitem.Null{})
if o.Filter != nil {
filter = stackitem.Make(*o.Filter)
@ -55,10 +35,11 @@ func (o *OracleRequest) toStackItem() stackitem.Item {
stackitem.NewByteArray(o.CallbackContract.BytesBE()),
stackitem.Make(o.CallbackMethod),
stackitem.NewByteArray(o.UserData),
})
}), nil
}
func (o *OracleRequest) fromStackItem(it stackitem.Item) error {
// FromStackItem implements stackitem.Convertible interface.
func (o *OracleRequest) FromStackItem(it stackitem.Item) error {
arr, ok := it.Value().([]stackitem.Item)
if !ok || len(arr) < 7 {
return errors.New("not an array of needed length")