func SignSignable(priv []byte, data interfaces.ISignable) ([]byte, error) {
d, err := data.MarshalBinarySig()
if err != nil {
return nil, err
}
return Sign(priv, d), nil
}
func SignCommit(n uint64, tx interfaces.ISignable) {
err := tx.Sign(NewPrivKey(n))
if err != nil {
panic(err)
}
}