// safeGet fetches a pointer to the data for the key in the treap, then
// copies the value so that the original pointer to the key is never written
// to accidentally later.
// TODO This function could also check to make sure the states of the ticket
// treap value are valid.
func safeGet(t *tickettreap.Immutable, k tickettreap.Key) (*tickettreap.Value, error) {
v := t.Get(k)
if v == nil {
h := chainhash.Hash(k)
return nil, stakeRuleError(ErrMissingTicket, fmt.Sprintf(
"ticket %v was supposed to be in the passed "+
"treap, but could not be found", h))
}
return &tickettreap.Value{
Height: v.Height,
Missed: v.Missed,
Revoked: v.Revoked,
Spent: v.Spent,
Expired: v.Expired,
}, nil
}
