Move payment method list into config.

public/javascripts/payments.js

@@ -704,7 +704,8 @@
       input.parentElement.classList.toggle(
         'visible',
         input.value === 'card' ||
-          (paymentMethods[input.value].countries.includes(country) &&
+          (config.paymentMethods.includes(input.value) &&
+            paymentMethods[input.value].countries.includes(country) &&
             paymentMethods[input.value].currencies.includes(config.currency))
       );
     }

server/node/config.js

@@ -14,10 +14,25 @@ module.exports = {
   country: 'US',
 
   // Store currency.
-  // Note: A few payment methods like iDEAL or SOFORT only work with euros,
-  // so it's a good common denominator to test both Elements and Sources.
   currency: 'eur',
 
+  // Supported payment methods for the store.
+  // Some payment methods support only a subset of currencies.
+  // Make sure to check the docs: https://stripe.com/docs/sources
+  paymentMethods: [
+    // 'ach_credit_transfer', // usd (ACH Credit Transfer payments must be in U.S. Dollars)
+    'alipay', // Can be aud, cad, eur, gbp, hkd, jpy, nzd, sgd, or usd.
+    'bancontact', // eur (Bancontact must always use Euros)
+    'card', // many (https://stripe.com/docs/currencies#presentment-currencies)
+    'eps', // eur (EPS must always use Euros)
+    'ideal', // eur (iDEAL must always use Euros)
+    'giropay', // eur (Giropay must always use Euros)
+    'multibanco', // eur (Multibanco must always use Euros)
+    // 'sepa_debit', // Restricted. See docs for activation details: https://stripe.com/docs/sources/sepa-debit
+    'sofort', // eur (SOFORT must always use Euros)
+    'wechat', // Can be aud, cad, eur, gbp, hkd, jpy, sgd, or usd.
+  ],
+
   // Configuration for Stripe.
   // API Keys: https://dashboard.stripe.com/account/apikeys
   // Webhooks: https://dashboard.stripe.com/account/webhooks

server/node/routes.js

@@ -53,19 +53,7 @@ router.post('/payment_intents', async (req, res, next) => {
     const paymentIntent = await stripe.paymentIntents.create({
       amount,
       currency,
-      payment_method_types: [
-        // 'ach_credit_transfer', // throws: error: "Invalid currency: eur. The payment method `ach_credit_transfer` only supports the following currencies: usd."
-        'alipay',
-        'bancontact',
-        'card',
-        'eps',
-        'ideal',
-        'giropay',
-        'multibanco',
-        'sepa_debit',
-        'sofort',
-        'wechat',
-      ], // TODO config & gating
+      payment_method_types: config.paymentMethods,
     });
     return res.status(200).json({paymentIntent});
   } catch (err) {
@@ -177,6 +165,7 @@ router.get('/config', (req, res) => {
     stripeCountry: config.stripe.country,
     country: config.country,
     currency: config.currency,
+    paymentMethods: config.paymentMethods,
   });
 });