Method decreaseAccountToken

blockproducer/metastate.go:272–286

(k proto.AccountAddress, amount uint64, tokenType types.TokenType)

}

func (s *metaState) decreaseAccountToken(k proto.AccountAddress, amount uint64, tokenType types.TokenType) error {
	var (
		src, dst *types.Account
		ok       bool
	)
	if dst, ok = s.dirty.accounts[k]; !ok {
		if src, ok = s.readonly.accounts[k]; !ok {
			err := errors.Wrap(ErrAccountNotFound, "decrease account balance fail")
			return err
		}
		dst = deepcopy.Copy(src).(*types.Account)
		s.dirty.accounts[k] = dst
	}
	return safeSub(&dst.TokenBalance[tokenType], &amount)
}

func (s *metaState) increaseAccountStableBalance(k proto.AccountAddress, amount uint64) error {
	return s.increaseAccountToken(k, amount, types.Particle)