feat: Add support for provider-level configuration in billing plugin

- Introduce `onConfig` callback for payment providers
- Add dynamic endpoint registration for Mollie webhook handling
- Remove unused provider-specific configurations from plugin types
- Update initialization to include provider-level configurations

src/plugin/config.ts

@@ -10,18 +10,6 @@ export const defaults = {
 }
 
 // Provider configurations
-export interface StripeConfig {
-  apiVersion?: string
-  publishableKey: string
-  secretKey: string
-  webhookEndpointSecret: string
-}
-
-export interface MollieConfig {
-  apiKey: string
-  testMode?: boolean
-  webhookUrl: string
-}
 
 export interface TestProviderConfig {
   autoComplete?: boolean
@@ -65,13 +53,5 @@ export interface BillingPluginConfig {
   customerRelationSlug?: string // Customer collection slug for relationship
   disabled?: boolean
   providers?: PaymentProvider[]
-  webhooks?: {
-    basePath?: string
-    cors?: boolean
-  }
 }
 
-// Plugin type
-export interface BillingPluginOptions extends BillingPluginConfig {
-  disabled?: boolean
-}

src/plugin/index.ts

@@ -25,7 +25,11 @@ export const billingPlugin = (pluginConfig: BillingPluginConfig = {}) => (config
     createPaymentsCollection(pluginConfig),
     createInvoicesCollection(pluginConfig),
     createRefundsCollection(pluginConfig),
-  ]
+  ];
+
+  (pluginConfig.providers || [])
+    .filter(provider => provider.onConfig)
+    .forEach(provider => provider.onConfig!(config, pluginConfig))
 
   const incomingOnInit = config.onInit
   config.onInit = async (payload) => {
@@ -35,15 +39,16 @@ export const billingPlugin = (pluginConfig: BillingPluginConfig = {}) => (config
     singleton.set(payload, {
       config: pluginConfig,
       providerConfig: (pluginConfig.providers || []).reduce(
-        (acc, val) => {
-          acc[val.key] = val
-          return acc
+        (record, provider) => {
+          record[provider.key] = provider
+          return record
         },
         {} as Record<string, PaymentProvider>
       )
     } satisfies BillingPlugin)
-    console.log('Billing plugin initialized', singleton.get(payload))
-    await Promise.all((pluginConfig.providers || []).map(p => p.onInit(payload)))
+    await Promise.all((pluginConfig.providers || [])
+      .filter(provider => provider.onInit)
+      .map(provider => provider.onInit!(payload)))
   }
 
   return config

src/providers/mollie.ts

@@ -1,6 +1,6 @@
 import type { Payment } from '@/plugin/types/payments'
 import type { InitPayment, PaymentProvider } from '@/plugin/types'
-import type { Payload } from 'payload'
+import type { Config, Payload } from 'payload'
 import { createSingleton } from '@/plugin/singleton'
 import type { createMollieClient, MollieClient } from '@mollie/api-client'
 
@@ -11,10 +11,29 @@ export const mollieProvider = (config: MollieProviderConfig) => {
   const singleton = createSingleton<MollieClient>(symbol)
   return {
     key: 'mollie',
+    onConfig: config => {
+      config.endpoints = [
+        ...(config.endpoints || []),
+        {
+          path: '/payload-billing/mollie/webhook',
+          method: 'post',
+          handler: async (req) => {
+            const payload = req.payload
+            const mollieClient = singleton.get(payload)
+            if (!req.text) {
+              throw new Error('No text body')
+            }
+            const molliePaymentId = (await req.text()).slice(3)
+
+          }
+        }
+      ]
+    },
     onInit: async (payload: Payload) => {
       const createMollieClient = (await import('@mollie/api-client')).default
       const mollieClient = createMollieClient(config)
       singleton.set(payload, mollieClient)
+
     },
     initPayment: async (payload, payment) => {
       if (!payment.amount) {

src/providers/types.ts

@@ -1,10 +1,12 @@
 import type { Payment } from '@/plugin/types/payments'
-import type { Payload } from 'payload'
+import type { Config, Payload } from 'payload'
+import type { BillingPluginConfig } from '@/plugin/config'
 
 export type InitPayment = (payload: Payload, payment: Partial<Payment>) => Promise<Partial<Payment>>
 
 export type PaymentProvider = {
   key: string
-  onInit: (payload: Payload) => Promise<void> | void
+  onConfig?: (config: Config, pluginConfig: BillingPluginConfig) => void
+  onInit?: (payload: Payload) => Promise<void> | void
   initPayment: InitPayment
 }