sponsor percent should be more than zero

core/types/meta_transaction.go

@@ -22,7 +22,7 @@ var (
  ErrExpiredMetaTx = errors.New("expired meta transaction")
  ErrInvalidGasFeeSponsorSig = errors.New("invalid gas fee sponsor signature")
  ErrGasFeeSponsorMismatch = errors.New("gas fee sponsor address is mismatch with signature")
- ErrInvalidSponsorPercent = errors.New("invalid sponsor percent, expected range [0, 100]")
+ ErrInvalidSponsorPercent = errors.New("invalid sponsor percent, expected range (0, 100]")
  ErrSponsorBalanceNotEnough = errors.New("sponsor doesn't have enough balance")
 )
 
@@ -128,7 +128,8 @@ func DecodeAndVerifyMetaTxParams(tx *Transaction, isMetaTxUpgraded bool) (*MetaT
  return nil, nil
  }
 
- if metaTxParams.SponsorPercent > OneHundredPercent {
+ if metaTxParams.SponsorPercent > OneHundredPercent ||
+ metaTxParams.SponsorPercent == 0 {
  return nil, ErrInvalidSponsorPercent
  }