fix derive invoice state spec

backend/src/utils/invoice/deriveInvoiceState.spec.ts

@@ -110,6 +110,6 @@ describe('deriveInvoiceState', () => {
                 moneroDetails: undefined,
                 payments: [{ amountAtomic: '1000', confirmations: 10 }]
             })
-        ).toThrow('Invoice is missing Monero required confirmations');
+        ).toThrow('Invoice is missing xmr required confirmations');
     });
 });