MoonpayModal: provice NIM address even if not supported, as it's required

Our request signing endpoint expects a NIM address to be set.

Author: danimoh

src/components/modals/MoonpayModal.vue

@@ -97,12 +97,12 @@ export default defineComponent({
         if (defaultCurrencyCode === CryptoCurrency.USDC) defaultCurrencyCode = 'usdc_polygon';
         if (defaultCurrencyCode === CryptoCurrency.USDT) defaultCurrencyCode = 'usdt_polygon';
 
-        // NIM is not currency supported anymore by Moonpay.
-        const nimAddress = undefined;
-        // const nimAddress = !config.disableNetworkInteraction
-        //     // Remove spaces in NIM address, as spaces are invalid URI components
-        //     ? useAddressStore().state.activeAddress?.replace(/\s/g, '')
-        //     : undefined;
+        // Note: even though NIM is not currency supported anymore by Moonpay, we have to provide the nimAddress because
+        // our signing endpoint config.moonpay.signatureEndpoint expects it.
+        const nimAddress = !config.disableNetworkInteraction
+            // Remove spaces in NIM address, as spaces are invalid URI components
+            ? useAddressStore().state.activeAddress?.replace(/\s/g, '')
+            : undefined;
 
         // Having a BTC address must be optional, so that the widget also works
         // for legacy or non-bitcoin-activated accounts.