Function DecreaseBalance

state/storage.go:110–119

(db database.KeyValueReaderWriterDeleter, address ids.ShortID, chainID ids.ID, amount uint64)

}

func DecreaseBalance(db database.KeyValueReaderWriterDeleter, address ids.ShortID, chainID ids.ID, amount uint64) error {
	balance, err := GetBalance(db, address, chainID)
	if err != nil {
		return err
	}
	if balance < amount {
		return errInsufficientBalance
	}
	return SetBalance(db, address, chainID, balance-amount)
}

func IncreaseBalance(db database.KeyValueReaderWriterDeleter, address ids.ShortID, chainID ids.ID, amount uint64) error {
	balance, err := GetBalance(db, address, chainID)