[Home](./index.md) > [@snowplow/node-tracker](./node-tracker.md) > [EcommerceTransactionEvent](./node-tracker.ecommercetransactionevent.md) > [orderId](./node-tracker.ecommercetransactionevent.orderid.md) ## EcommerceTransactionEvent.orderId property An identifier for the order Signature: ```typescript orderId: string; ```