140 lines
3.4 KiB
Go
140 lines
3.4 KiB
Go
package state
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import (
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"crypto/elliptic"
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"math/big"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// NEP17BalanceState represents balance state of a NEP17-token.
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type NEP17BalanceState struct {
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Balance big.Int
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}
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// NEOBalanceState represents balance state of a NEO-token.
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type NEOBalanceState struct {
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NEP17BalanceState
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BalanceHeight uint32
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VoteTo *keys.PublicKey
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}
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// NEP17BalanceStateFromBytes converts serialized NEP17BalanceState to structure.
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func NEP17BalanceStateFromBytes(b []byte) (*NEP17BalanceState, error) {
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balance := new(NEP17BalanceState)
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if len(b) == 0 {
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return balance, nil
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}
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r := io.NewBinReaderFromBuf(b)
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balance.DecodeBinary(r)
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if r.Err != nil {
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return nil, r.Err
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}
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return balance, nil
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}
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// Bytes returns serialized NEP17BalanceState.
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func (s *NEP17BalanceState) Bytes() []byte {
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w := io.NewBufBinWriter()
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s.EncodeBinary(w.BinWriter)
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if w.Err != nil {
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panic(w.Err)
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}
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return w.Bytes()
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}
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func (s *NEP17BalanceState) toStackItem() stackitem.Item {
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return stackitem.NewStruct([]stackitem.Item{stackitem.NewBigInteger(&s.Balance)})
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}
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func (s *NEP17BalanceState) fromStackItem(item stackitem.Item) {
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s.Balance = *item.(*stackitem.Struct).Value().([]stackitem.Item)[0].Value().(*big.Int)
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}
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// EncodeBinary implements io.Serializable interface.
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func (s *NEP17BalanceState) EncodeBinary(w *io.BinWriter) {
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si := s.toStackItem()
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stackitem.EncodeBinaryStackItem(si, w)
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}
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// DecodeBinary implements io.Serializable interface.
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func (s *NEP17BalanceState) DecodeBinary(r *io.BinReader) {
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si := stackitem.DecodeBinaryStackItem(r)
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if r.Err != nil {
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return
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}
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s.fromStackItem(si)
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}
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// NEOBalanceStateFromBytes converts serialized NEOBalanceState to structure.
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func NEOBalanceStateFromBytes(b []byte) (*NEOBalanceState, error) {
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balance := new(NEOBalanceState)
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if len(b) == 0 {
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return balance, nil
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}
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r := io.NewBinReaderFromBuf(b)
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balance.DecodeBinary(r)
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if r.Err != nil {
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return nil, r.Err
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}
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return balance, nil
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}
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// Bytes returns serialized NEOBalanceState.
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func (s *NEOBalanceState) Bytes() []byte {
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w := io.NewBufBinWriter()
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s.EncodeBinary(w.BinWriter)
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if w.Err != nil {
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panic(w.Err)
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}
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return w.Bytes()
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}
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// EncodeBinary implements io.Serializable interface.
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func (s *NEOBalanceState) EncodeBinary(w *io.BinWriter) {
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si := s.toStackItem()
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stackitem.EncodeBinaryStackItem(si, w)
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}
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// DecodeBinary implements io.Serializable interface.
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func (s *NEOBalanceState) DecodeBinary(r *io.BinReader) {
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si := stackitem.DecodeBinaryStackItem(r)
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if r.Err != nil {
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return
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}
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r.Err = s.fromStackItem(si)
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}
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func (s *NEOBalanceState) toStackItem() stackitem.Item {
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result := s.NEP17BalanceState.toStackItem().(*stackitem.Struct)
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result.Append(stackitem.NewBigInteger(big.NewInt(int64(s.BalanceHeight))))
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if s.VoteTo != nil {
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result.Append(stackitem.NewByteArray(s.VoteTo.Bytes()))
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} else {
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result.Append(stackitem.Null{})
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}
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return result
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}
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func (s *NEOBalanceState) fromStackItem(item stackitem.Item) error {
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structItem := item.Value().([]stackitem.Item)
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s.Balance = *structItem[0].Value().(*big.Int)
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s.BalanceHeight = uint32(structItem[1].Value().(*big.Int).Int64())
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if _, ok := structItem[2].(stackitem.Null); ok {
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s.VoteTo = nil
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return nil
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}
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bs, err := structItem[2].TryBytes()
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if err != nil {
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return err
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}
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pub, err := keys.NewPublicKeyFromBytes(bs, elliptic.P256())
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if err != nil {
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return err
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}
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s.VoteTo = pub
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return nil
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}
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