neoneo-go/pkg/core/state/mpt_root.go
Evgenii Stratonikov 0e29382035 core: update MPT during block processing
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2020-07-30 12:42:15 +03:00

105 lines
2.5 KiB
Go

package state
import (
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/util"
)
// MPTRootBase represents storage state root.
type MPTRootBase struct {
Version byte
Index uint32
PrevHash util.Uint256
Root util.Uint256
}
// MPTRoot represents storage state root together with sign info.
type MPTRoot struct {
MPTRootBase
Witness *transaction.Witness
}
// MPTRootStateFlag represents verification state of the state root.
type MPTRootStateFlag byte
// Possible verification states of MPTRoot.
const (
Unverified MPTRootStateFlag = 0x00
Verified MPTRootStateFlag = 0x01
Invalid MPTRootStateFlag = 0x03
)
// MPTRootState represents state root together with its verification state.
type MPTRootState struct {
MPTRoot
Flag MPTRootStateFlag
}
// EncodeBinary implements io.Serializable.
func (s *MPTRootState) EncodeBinary(w *io.BinWriter) {
w.WriteB(byte(s.Flag))
s.MPTRoot.EncodeBinary(w)
}
// DecodeBinary implements io.Serializable.
func (s *MPTRootState) DecodeBinary(r *io.BinReader) {
s.Flag = MPTRootStateFlag(r.ReadB())
s.MPTRoot.DecodeBinary(r)
}
// GetSignedPart returns part of MPTRootBase which needs to be signed.
func (s *MPTRootBase) GetSignedPart() []byte {
buf := io.NewBufBinWriter()
s.EncodeBinary(buf.BinWriter)
return buf.Bytes()
}
// Equals checks if s == other.
func (s *MPTRootBase) Equals(other *MPTRootBase) bool {
return s.Version == other.Version && s.Index == other.Index &&
s.PrevHash.Equals(other.PrevHash) && s.Root.Equals(other.Root)
}
// Hash returns hash of s.
func (s *MPTRootBase) Hash() util.Uint256 {
return hash.DoubleSha256(s.GetSignedPart())
}
// DecodeBinary implements io.Serializable.
func (s *MPTRootBase) DecodeBinary(r *io.BinReader) {
s.Version = r.ReadB()
s.Index = r.ReadU32LE()
s.PrevHash.DecodeBinary(r)
s.Root.DecodeBinary(r)
}
// EncodeBinary implements io.Serializable.
func (s *MPTRootBase) EncodeBinary(w *io.BinWriter) {
w.WriteB(s.Version)
w.WriteU32LE(s.Index)
s.PrevHash.EncodeBinary(w)
s.Root.EncodeBinary(w)
}
// DecodeBinary implements io.Serializable.
func (s *MPTRoot) DecodeBinary(r *io.BinReader) {
s.MPTRootBase.DecodeBinary(r)
var ws []transaction.Witness
r.ReadArray(&ws, 1)
if len(ws) == 1 {
s.Witness = &ws[0]
}
}
// EncodeBinary implements io.Serializable.
func (s *MPTRoot) EncodeBinary(w *io.BinWriter) {
s.MPTRootBase.EncodeBinary(w)
if s.Witness == nil {
w.WriteVarUint(0)
} else {
w.WriteArray([]*transaction.Witness{s.Witness})
}
}