feat: update frontend billing api for mollie (country, vat_id, payment method update)

lib/api/billing.ts

@@ -72,6 +72,8 @@ export interface CreateCheckoutParams {
   plan_id: string
   interval: string
   limit: number
+  country: string
+  vat_id?: string
 }
 
 export async function createCheckoutSession(params: CreateCheckoutParams): Promise<{ url: string }> {
@@ -81,6 +83,13 @@ export async function createCheckoutSession(params: CreateCheckoutParams): Promi
   })
 }
 
+/** Creates a Mollie checkout session to update the payment mandate. */
+export async function updatePaymentMethod(): Promise<{ url: string }> {
+  return apiRequest<{ url: string }>('/api/billing/update-payment-method', {
+    method: 'POST',
+  })
+}
+
 export interface Order {
   id: string
   total_amount: number