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native: remove unregistered candidate with 0 votes on NEO transfer

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See neo-project/neo#1935.
This commit is contained in:
Roman Khimov 2020-09-29 22:38:38 +03:00
parent 230352d99f
commit 5365da9860
1 changed files with 7 additions and 16 deletions
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23
pkg/core/native/native_neo.go
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@ -309,7 +309,7 @@ func (n *NEO) increaseBalance(ic *interop.Context, h util.Uint160, si *state.Sto
si.Value = acc.Bytes()
return nil
}
if err := n.ModifyAccountVotes(acc, ic.DAO, amount, modifyVoteTransfer); err != nil {
if err := n.ModifyAccountVotes(acc, ic.DAO, amount, false); err != nil {
return err
}
if acc.VoteTo != nil {
@ -550,26 +550,20 @@ func (n *NEO) VoteInternal(ic *interop.Context, h util.Uint160, pub *keys.Public
return err
}
}
if err := n.ModifyAccountVotes(acc, ic.DAO, new(big.Int).Neg(&acc.Balance), modifyVoteOld); err != nil {
if err := n.ModifyAccountVotes(acc, ic.DAO, new(big.Int).Neg(&acc.Balance), false); err != nil {
return err
}
acc.VoteTo = pub
if err := n.ModifyAccountVotes(acc, ic.DAO, &acc.Balance, modifyVoteNew); err != nil {
if err := n.ModifyAccountVotes(acc, ic.DAO, &acc.Balance, true); err != nil {
return err
}
si.Value = acc.Bytes()
return ic.DAO.PutStorageItem(n.ContractID, key, si)
}
const (
modifyVoteTransfer = iota
modifyVoteOld
modifyVoteNew
)
// ModifyAccountVotes modifies votes of the specified account by value (can be negative).
// typ specifies if this modify is occurring during transfer or vote (with old or new validator).
func (n *NEO) ModifyAccountVotes(acc *state.NEOBalanceState, d dao.DAO, value *big.Int, typ int) error {
func (n *NEO) ModifyAccountVotes(acc *state.NEOBalanceState, d dao.DAO, value *big.Int, isNewVote bool) error {
n.votesChanged.Store(true)
if acc.VoteTo != nil {
key := makeValidatorKey(acc.VoteTo)
@ -579,15 +573,12 @@ func (n *NEO) ModifyAccountVotes(acc *state.NEOBalanceState, d dao.DAO, value *b
}
cd := new(candidate).FromBytes(si.Value)
cd.Votes.Add(&cd.Votes, value)
switch typ {
case modifyVoteOld:
if !isNewVote {
if !cd.Registered && cd.Votes.Sign() == 0 {
return d.DeleteStorageItem(n.ContractID, key)
}
case modifyVoteNew:
if !cd.Registered {
return errors.New("validator must be registered")
}
} else if !cd.Registered {
return errors.New("validator must be registered")
}
n.validators.Store(keys.PublicKeys(nil))
si.Value = cd.Bytes()