forked from TrueCloudLab/neoneo-go
76 lines
2 KiB
Go
76 lines
2 KiB
Go
package state
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import (
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"encoding/binary"
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"github.com/nspcc-dev/neo-go/pkg/config/netmode"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/util"
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)
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// MPTRoot represents storage state root together with sign info.
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type MPTRoot struct {
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Network netmode.Magic `json:"-"`
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Version byte `json:"version"`
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Index uint32 `json:"index"`
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Root util.Uint256 `json:"stateroot"`
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Witness *transaction.Witness `json:"witness,omitempty"`
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}
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// GetSignedPart returns part of MPTRootBase which needs to be signed.
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func (s *MPTRoot) GetSignedPart() []byte {
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b := make([]byte, 4+32)
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binary.LittleEndian.PutUint32(b, uint32(s.Network))
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h := s.Hash()
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copy(b[4:], h[:])
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return b
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}
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// GetSignedHash returns hash of MPTRootBase which needs to be signed.
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func (s *MPTRoot) GetSignedHash() util.Uint256 {
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return hash.Sha256(s.GetSignedPart())
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}
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// Hash returns hash of s.
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func (s *MPTRoot) Hash() util.Uint256 {
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buf := io.NewBufBinWriter()
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s.EncodeBinaryUnsigned(buf.BinWriter)
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return hash.Sha256(buf.Bytes())
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}
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// DecodeBinaryUnsigned decodes hashable part of state root.
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func (s *MPTRoot) DecodeBinaryUnsigned(r *io.BinReader) {
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s.Version = r.ReadB()
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s.Index = r.ReadU32LE()
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s.Root.DecodeBinary(r)
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}
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// EncodeBinaryUnsigned encodes hashable part of state root..
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func (s *MPTRoot) EncodeBinaryUnsigned(w *io.BinWriter) {
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w.WriteB(s.Version)
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w.WriteU32LE(s.Index)
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s.Root.EncodeBinary(w)
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}
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// DecodeBinary implements io.Serializable.
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func (s *MPTRoot) DecodeBinary(r *io.BinReader) {
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s.DecodeBinaryUnsigned(r)
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var ws []transaction.Witness
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r.ReadArray(&ws, 1)
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if len(ws) == 1 {
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s.Witness = &ws[0]
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}
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}
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// EncodeBinary implements io.Serializable.
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func (s *MPTRoot) EncodeBinary(w *io.BinWriter) {
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s.EncodeBinaryUnsigned(w)
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if s.Witness == nil {
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w.WriteVarUint(0)
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} else {
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w.WriteArray([]*transaction.Witness{s.Witness})
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}
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}
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