Function validateQueuedBatchCurrencies

transaction.go:981–994

validateQueuedBatchCurrencies ensures that every transaction in a coalesced batch uses the same currency before any lock or balance work begins.

(transactions []*model.Transaction)

// validateQueuedBatchCurrencies ensures that every transaction in a coalesced batch uses the
// same currency before any lock or balance work begins.
func validateQueuedBatchCurrencies(transactions []*model.Transaction) error {
	if len(transactions) == 0 {
		return nil
	}

	currency := transactions[0].Currency
	for _, txn := range transactions[1:] {
		if txn.Currency != currency {
			return fmt.Errorf("coalescing batch contains multiple currencies")
		}
	}

	return nil
}

// persistQueuedTransactionBatchLocked prepares every transaction against the shared in-memory
// balance set and persists the final balance and transaction state atomically.