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

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+import { PaymentMethod } from '../../modules/payment/types/PaymentMethod';
+import { resolveInvoiceRequiredConfirmations } from './resolveInvoiceRequiredConfirmations';
+
+describe('resolveInvoiceRequiredConfirmations', () => {
+    it('returns required confirmations for XMR invoices', () => {
+        expect(
+            resolveInvoiceRequiredConfirmations({
+                paymentMethod: PaymentMethod.Xmr,
+                moneroDetails: { requiredConfirmations: 3 }
+            })
+        ).toBe(3);
+    });
+
+    it('throws when monero details are missing', () => {
+        expect(() =>
+            resolveInvoiceRequiredConfirmations({
+                paymentMethod: PaymentMethod.Xmr,
+                moneroDetails: null
+            })
+        ).toThrow('Invoice is missing Monero required confirmations');
+    });
+
+    it('throws for unsupported payment methods', () => {
+        expect(() =>
+            resolveInvoiceRequiredConfirmations({
+                paymentMethod: 'btc' as PaymentMethod
+            })
+        ).toThrow('Unsupported payment method: btc');
+    });
+});