So far, this Get Started exercise has used API Explorer and the Developer Console. Now, you use the Sandbox Square Dashboard to see how sellers verify the payment.
On the Sandbox test accounts page in the Developer Console, choose Square Dashboard next to Default Test Account. This link opens the Sandbox Square Dashboard associated with the default test account.
In the Sandbox Square Dashboard, choose Transactions.
On the Transactions page, choose the payment you made. If you don't see your payment, select a date range that includes your payment.