What does the invoice expiry mean?

A Sheepy invoice is valid for 15 minutes from the moment it is created. This limited window protects both the merchant and the customer from rapid fluctuations in cryptocurrency exchange rates. During this period, the price is locked, ensuring payment accuracy without being affected by market volatility. If no payment is received within the allotted time, the invoice will expire and can no longer be used. To complete the transaction, a new invoice must be generated.