Our dev team are developing payment functionalities. I am responsible for Apply Pay backend purchase validation. I will call App Store's verify API:verifyReceipt: https://sandbox.itunes.apple.com/verifyReceipt to verify the receipt passed from ios client. And now, ios client is not ready for developing, so i can not get a receipt to verify. So, is there any workaround to get it?
There is no way to test this without sample data and as far as I know Apple doesn't provide such. Maybe you're lucky finding someone providing valid sample sandbox receipt data otherwise you’re unfortunately dependent on your iOS developer team. If they've already added IAPs maybe they can provide you receipt data manually.
Haven't tested the answers, but here is someone with a similar question on stackoverflow and some answers with receipt data.