From e55cdd19888db9eb7fb64a5463b35af09c8ccd91 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20G=C3=BCnther?= <th.guenther@saale-mail.de>
Date: Wed, 5 Aug 2026 10:00:02 +0200
Subject: [PATCH] Moved bank transfer logic to special module

---
 CLAUDE.md                                     |  17 ++
 .../Views/Partials/TenantPaymentMethods.vue   |  12 +-
 .../Event/Views/Partials/CommonSettings.vue   |  19 ++-
 .../SignUpForm/after-submit/SubmitSuccess.vue |  60 ++++---
 app/EventPaymentModules/CLAUDE.md             |  89 +++++++++++
 .../DTO/RegistrationSummaryRequest.php        |  12 +-
 .../DTO/RegistrationSummaryResponse.php       |  19 ++-
 .../Modules/AccountTransferPaymentModule.php  |  51 +++++-
 .../Modules/UndefinedPaymentModule.php        |  21 ++-
 app/EventPaymentModules/ProvidesGiroCode.php  |  21 +++
 .../Controllers/GiroCodeGetController.php     |  22 ++-
 .../EventSignUpSuccessfullMail.php            |  17 +-
 .../ParticipantPaymentMissingPaymentMail.php  |  17 +-
 app/Models/EventParticipant.php               |  48 +++++-
 app/Resources/EventParticipantResource.php    |   8 +
 .../emails/events/signup_complete.blade.php   |  20 ++-
 .../missing_amount.blade.php                  |   2 +-
 .../views/emails/subparts/payment.blade.php   | 124 +++++++--------
 .../EventParticipantPaymentSummaryTest.php    | 147 ++++++++++++++++++
 tests/Unit/EventPaymentModuleRegistryTest.php |   7 +
 tests/Unit/PaymentMethodOptionsTest.php       |   5 +-
 tests/Unit/RegistrationSummaryTest.php        |  96 ++++++++++++
 22 files changed, 669 insertions(+), 165 deletions(-)
 create mode 100644 CLAUDE.md
 create mode 100644 app/EventPaymentModules/CLAUDE.md
 create mode 100644 app/EventPaymentModules/ProvidesGiroCode.php
 create mode 100644 tests/Feature/EventParticipantPaymentSummaryTest.php
 create mode 100644 tests/Unit/RegistrationSummaryTest.php

diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..ed8db94
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,17 @@
+# CLAUDE.md
+
+Laravel 12 + Inertia/Vue, mandantenfähig (custom `tenant`-Scoping über `app('tenant')`, gesetzt in
+`app/Middleware/IdentifyTenant.php`). PHP 8.5 — Tests/Artisan laufen im Container:
+`docker exec mareike-mareike-app-1 php artisan test`.
+
+## Projektkonventionen (verbindlich)
+
+Die verbindlichen Konventionen (Actions/Request-Command-Response, Controller, Repositories, Models/Resources, Tenant,
+Routing, Mails) stehen in `.ai/conventions.md` und werden hier eingebunden — **immer beachten**:
+
+@.ai/conventions.md
+
+## Bereichs-Dokumentation
+
+- [Zahlungsmodule](app/EventPaymentModules/CLAUDE.md) — interface-gesteuerte Zahlungsarten (Optionen, Config,
+  Anmelde-Zusammenfassung, GiroCode/Fähigkeits-Interfaces, neues Modul hinzufügen).
diff --git a/app/Domains/Admin/Views/Partials/TenantPaymentMethods.vue b/app/Domains/Admin/Views/Partials/TenantPaymentMethods.vue
index d778c10..ac8d306 100644
--- a/app/Domains/Admin/Views/Partials/TenantPaymentMethods.vue
+++ b/app/Domains/Admin/Views/Partials/TenantPaymentMethods.vue
@@ -1,8 +1,9 @@
 <script setup>
-import { computed, ref } from 'vue';
+import {computed, ref} from 'vue';
 import FullScreenModal from "../../../../Views/Components/FullScreenModal.vue";
-import { useAjax } from "../../../../../resources/js/components/ajaxHandler.js";
-import { toast } from "vue3-toastify";
+import TextEditor from "../../../../Views/Components/TextEditor.vue";
+import {useAjax} from "../../../../../resources/js/components/ajaxHandler.js";
+import {toast} from "vue3-toastify";
 
 const props = defineProps({
     data: {
@@ -95,7 +96,10 @@ async function save() {
                 <tr><th>Beschreibung</th><td><textarea v-model="form.description" class="form-input"></textarea></td></tr>
                 <tr v-for="option in editing.optionsSchema ?? []" :key="option.name">
                     <th>{{ option.label }}<span v-if="option.required" class="required-marker">*</span></th>
-                    <td><input type="text" v-model="form.configuration[option.name]" class="form-input" /></td>
+                    <td>
+                        <TextEditor v-if="option.type === 'richtext'" v-model="form.configuration[option.name]"/>
+                        <input v-else type="text" v-model="form.configuration[option.name]" class="form-input"/>
+                    </td>
                 </tr>
                 <tr>
                     <th>Aktiv</th>
diff --git a/app/Domains/Event/Views/Partials/CommonSettings.vue b/app/Domains/Event/Views/Partials/CommonSettings.vue
index 168828e..c5ac008 100644
--- a/app/Domains/Event/Views/Partials/CommonSettings.vue
+++ b/app/Domains/Event/Views/Partials/CommonSettings.vue
@@ -1,11 +1,12 @@
 <script setup>
-    import {onMounted, reactive, ref} from "vue";
-    import ErrorText from "../../../../Views/Components/ErrorText.vue";
-    import AmountInput from "../../../../Views/Components/AmountInput.vue";
-    import {request} from "../../../../../resources/js/components/HttpClient.js";
-    import {toast} from "vue3-toastify";
+import {onMounted, reactive, ref} from "vue";
+import ErrorText from "../../../../Views/Components/ErrorText.vue";
+import AmountInput from "../../../../Views/Components/AmountInput.vue";
+import TextEditor from "../../../../Views/Components/TextEditor.vue";
+import {request} from "../../../../../resources/js/components/HttpClient.js";
+import {toast} from "vue3-toastify";
 
-    const emit = defineEmits(['close'])
+const emit = defineEmits(['close'])
 
 
     const props = defineProps({
@@ -245,7 +246,11 @@
                             >
                                 <div v-for="option in paymentMethod.optionsSchema" :key="option.name" class="payment-method-config-row">
                                     <label>{{ option.label }}<span v-if="option.required" class="required-marker">*</span></label>
-                                    <input type="text" v-model="paymentMethodConfigurations[paymentMethod.slug][option.name]" class="width-full" />
+                                    <TextEditor v-if="option.type === 'richtext'"
+                                                v-model="paymentMethodConfigurations[paymentMethod.slug][option.name]"/>
+                                    <input v-else type="text"
+                                           v-model="paymentMethodConfigurations[paymentMethod.slug][option.name]"
+                                           class="width-full"/>
                                 </div>
                             </div>
                         </td>
diff --git a/app/Domains/Event/Views/Partials/SignUpForm/after-submit/SubmitSuccess.vue b/app/Domains/Event/Views/Partials/SignUpForm/after-submit/SubmitSuccess.vue
index 3f5e033..7da5742 100644
--- a/app/Domains/Event/Views/Partials/SignUpForm/after-submit/SubmitSuccess.vue
+++ b/app/Domains/Event/Views/Partials/SignUpForm/after-submit/SubmitSuccess.vue
@@ -26,30 +26,46 @@ const props = defineProps({
             Du hast noch kein erweitertes Führungszeugnis hinterlegt. Bitte reiche es umgehend ein.
         </div>
 
-        <template v-if="props.participant.needs_payment">
-            <table class="form-table" style="margin-bottom: 16px;">
-                <tr>
-                    <td>Kontoinhaber:</td><td>{{ props.event.accountOwner }}</td>
-                    <td rowspan="4" style="vertical-align: top; padding-left: 20px;" v-if="props.participant.identifier !== ''">
-                        <img :src="'/print-girocode/' + props.participant.identifier" alt="GiroCode" style="max-width: 180px;" />
-                        <span style="width: 180px; text-align: center; display: block; font-size: 0.8rem; color: #6b7280; margin-top: 4px;">Giro-Code</span>
-                    </td>
-                </tr>
-                <tr><td>IBAN:</td><td>{{ props.event.accountIban }}</td></tr>
-                <tr><td>Verwendungszweck:</td><td>{{ props.participant.payment_purpose }}</td></tr>
-                <tr><td>Betrag:</td><td><strong>{{ props.participant.amount_left_string }}</strong></td></tr>
-                <tr><td>&nbsp;</td><td>
-                    <a class="link" :href="`/api/v1/event/participant/${props.participant.identifier}/ical-payment`">Erinnerung in Kalender setzen</a>
-                </td></tr>
-            </table>
-
-            <p>
-                Bitte beachte, dass deine Anmeldung erst nach Zahlungseiongang vollständig ist.<br />
-                Wenn dieser nicht bis zum {{ props.event.registrationFinalEnd.formatted }} erfolgt, kann deine Anmeldung storniert werden.<br /><br />
-                Solltest du den Beitrag bis zu diesem Datum nicht oder nur teilweise überweisen können, kontaktiere bitte die Aktionsleitung, damit wir eine gemeinsame Lösiung finden können.
-            </p>
+        <template v-if="props.participant.paymentSummary?.hasPaymentInformation">
+            <!-- Frei konfigurierter Text (z.B. Barzahlung) -->
+            <div v-if="props.participant.paymentSummary.html" v-html="props.participant.paymentSummary.html"
+                 style="margin-bottom: 16px;"></div>
 
+            <!-- Strukturierte Zeilen (z.B. Überweisung) -->
+            <template v-else>
+                <table class="form-table" style="margin-bottom: 16px;">
+                    <tr v-for="(line, index) in props.participant.paymentSummary.lines" :key="line.label">
+                        <td>{{ line.label }}:</td>
+                        <td><strong v-if="line.label === 'Betrag'">{{ line.value }}</strong>
+                            <template v-else>{{ line.value }}</template>
+                        </td>
+                        <td v-if="index === 0 && props.participant.paymentSummary.showGiroCode && props.participant.identifier !== ''"
+                            :rowspan="props.participant.paymentSummary.lines.length"
+                            style="vertical-align: top; padding-left: 20px;">
+                            <img :src="'/print-girocode/' + props.participant.identifier" alt="GiroCode"
+                                 style="max-width: 180px;"/>
+                            <span
+                                style="width: 180px; text-align: center; display: block; font-size: 0.8rem; color: #6b7280; margin-top: 4px;">Giro-Code</span>
+                        </td>
+                    </tr>
+                    <tr>
+                        <td>&nbsp;</td>
+                        <td>
+                            <a class="link"
+                               :href="`/api/v1/event/participant/${props.participant.identifier}/ical-payment`">Erinnerung
+                                in Kalender setzen</a>
+                        </td>
+                    </tr>
+                </table>
 
+                <p>
+                    Bitte beachte, dass deine Anmeldung erst nach Zahlungseiongang vollständig ist.<br/>
+                    Wenn dieser nicht bis zum {{ props.event.registrationFinalEnd.formatted }} erfolgt, kann deine
+                    Anmeldung storniert werden.<br/><br/>
+                    Solltest du den Beitrag bis zu diesem Datum nicht oder nur teilweise überweisen können, kontaktiere
+                    bitte die Aktionsleitung, damit wir eine gemeinsame Lösiung finden können.
+                </p>
+            </template>
         </template>
         <p v-else>
             Du musst keinen Beitrag überweisen. Deine Anmeldung ist bestätigt.
diff --git a/app/EventPaymentModules/CLAUDE.md b/app/EventPaymentModules/CLAUDE.md
new file mode 100644
index 0000000..4398067
--- /dev/null
+++ b/app/EventPaymentModules/CLAUDE.md
@@ -0,0 +1,89 @@
+# Zahlungsmodule (`app/EventPaymentModules`)
+
+Interface-gesteuerte Strategie-Schicht: Das Verhalten je Zahlungsart (Optionen, Anmelde-Zusammenfassung, Zahlung,
+Rechnung) liegt gekapselt in einem Modul pro Zahlungsart. Aufgelöst wird über den Slug.
+
+## Aufbau
+
+- `EventPaymentModule` — **Core-Interface**. Hält nur das, was **jede** Zahlungsart hat:
+  `slug()`, `defaultName()/defaultDescription()`, `getOptions()`, `registrationSummary()`, `doPayment()`,
+  `createInvoice()`.
+- `AbstractEventPaymentModule` — Basisklasse (Template-Method). Liefert die aus `getOptions()` abgeleiteten Helfer
+  (`requiredOptionKeys()`, `sanitizeConfiguration()`, `isConfigurationComplete()`) und sinnvolle Default-/Stub-Bodies.
+- `Modules/` — konkrete Module (flach, eine Klasse je Zahlungsart):
+  `AccountTransferPaymentModule` (Überweisung), `UndefinedPaymentModule` (Barzahlung/Sonstiges).
+- `DTO/` — geteilte Request/Response-DTOs je Operation (`DoPayment*`, `CreateInvoice*`, `RegistrationSummary*`).
+- `EventPaymentModuleRegistry` — statische Map `slug → Modul-Instanz` (`forSlug()`, `all()`, `slugs()`). **Neue Module
+  hier eintragen.** Kein Container-Binding.
+- `ProvidesGiroCode` — **Fähigkeits-Interface** (siehe unten).
+
+## Kernregeln
+
+- **Options-Schema lebt im Code**, nicht in der DB (`getOptions()` je Modul). In der DB stehen nur die Werte.
+  Optionsform: `['name', 'label', 'type', 'required']`. `type` ist i.d.R. `'string'`; `'richtext'` wird im Frontend über
+  `Views/Components/TextEditor.vue` (TinyMCE, HTML) gerendert und via `v-html`/`{!! !!}` ausgegeben.
+- **Aktivierungs-Guard:** Eine Tenant-Zahlungsmethode darf nur `active` werden, wenn alle `required`-Optionen befüllt
+  sind (`isConfigurationComplete()`), erzwungen in `UpdateAvailablePaymentMethodAction`.
+- **Config-Speicherung (JSON):** pro Tenant auf `available_payment_methods.configuration`, pro Event auf dem Pivot
+  `event_payment_methods.configuration`. Beim Zuweisen an ein Event wird die Tenant-Config als **Snapshot kopiert**
+  (Copy-on-Assign, spätere Tenant-Änderungen wirken NICHT nach). Sync erfolgt differenziell in `UpdateEventCommand`.
+- **`PaymentMethod` ist nur eine Fassade:** `PaymentMethod::optionsFor/requiredOptionKeys/sanitizeConfiguration/`
+  `isConfigurationComplete/defaults()` delegieren an die Registry. Bestehende Aufrufstellen bleiben so stabil.
+- **`PaymentStatus`** ist ein DB-gestütztes Enumerations-Model (`app/Enumerations/PaymentStatus.php`, Tabelle
+  `payment_status`, geseedet in `ProductionDataSeeder`), analog zu `InvoiceStatus`. Reine Steuersignale (z.B. Redirect)
+  gehören NICHT ins Status-Vokabular, sondern als transiente Felder aufs Response-DTO.
+- `doPayment()` und `createInvoice()` sind aktuell **Stubs** (nur Struktur/DTOs vorhanden). `createInvoice()` ist als
+  Template-Method angelegt: gemeinsamer Rumpf in der Basis, `invoiceClosingStatement()` je Modul.
+
+## Zahlart-spezifisches Verhalten → Fähigkeits-Interfaces (Interface Segregation)
+
+Verhalten, das **nur eine** Zahlungsart hat, gehört **nicht** auf `EventPaymentModule` und **nicht** auf das generische
+`EventParticipant`-Model, sondern in ein schmales Fähigkeits-Interface, das nur das betreffende Modul implementiert.
+Aufrufer prüfen per `instanceof`.
+
+Beispiel GiroCode (nur Überweisung):
+
+- `ProvidesGiroCode::giroCode(EventParticipant, array $configuration): ?string` — implementiert **nur** von
+  `AccountTransferPaymentModule`.
+- Aufrufer (`GiroCodeGetController`, `EventSignUpSuccessfullMail`, `ParticipantPaymentMissingPaymentMail`) lösen inline
+  auf:
+  ```php
+  $module = $participant->paymentModule();
+  $binary = $module instanceof ProvidesGiroCode
+      ? $module->giroCode($participant, $participant->paymentConfiguration())
+      : null;
+  ```
+- Künftige Verfahren würden analog eigene Fähigkeiten mitbringen (z.B. `ProvidesRedirect` für PayPal,
+  `ProvidesMandate` für SEPA-Lastschrift) — **erst modellieren, wenn tatsächlich gebraucht.**
+
+## Anmelde-Zusammenfassung / Mail-Anzeige
+
+- `registrationSummary(RegistrationSummaryRequest): RegistrationSummaryResponse` liefert den zahlungsspezifischen
+  Anzeige-Block render-agnostisch: entweder `lines` (label/value, z.B. Überweisung) oder `html` (Freitext, z.B.
+  Barzahlung), plus `hasPaymentInformation` und `showGiroCode`.
+- Zugang über das Teilnehmer-Model: `EventParticipant::paymentModule()`, `paymentConfiguration()` (eager-load-fähig über
+  `->with('event.paymentMethods')`, kein statischer Cache), `paymentSummary()`.
+- Konsumiert von `EventParticipantResource` (`paymentSummary`), `SubmitSuccess.vue`, `emails/subparts/payment.blade.php`
+  (+ `signup_complete`, `missing_amount`). GiroCode in Mails: **inline per CID** (`$message->embedData(...)`), im Web
+  über `/print-girocode/{token}` (sessionlos, lazy).
+
+## Neues Zahlungsmodul hinzufügen
+
+1. Klasse unter `Modules/` anlegen, `extends AbstractEventPaymentModule`; `slug()`, `defaultName()`, `getOptions()`
+   implementieren; `registrationSummary()`/`doPayment()`/`createInvoice()` überschreiben, wo nötig.
+2. Zahlart-spezifische Extras als **eigenes Fähigkeits-Interface** (nicht ins Core-Interface).
+3. In `EventPaymentModuleRegistry::MODULES` eintragen. `PaymentMethod::create(['slug' => …])` wird dann automatisch über
+   `ProductionDataSeeder` (iteriert `EventPaymentModuleRegistry::slugs()`) geseedet.
+4. Slug-Konstante bei Bedarf auf `PaymentMethod` ergänzen.
+
+## Datenübernahme
+
+`storage/app/sync_payment_bank_data.php` überführt einmalig Bestands-Bankdaten (Tenant/Event) in die Modul-Config
+(idempotent). Bei Live-Inbetriebnahme einmal ausführen.
+
+## Tests
+
+`tests/Unit/PaymentMethodOptionsTest`, `tests/Unit/EventPaymentModuleRegistryTest`,
+`tests/Unit/RegistrationSummaryTest`, `tests/Feature/PaymentMethodConfigurationTest`,
+`tests/Feature/EventParticipantPaymentSummaryTest`. Ausführung im Container (PHP 8.5):
+`docker exec mareike-mareike-app-1 php artisan test`.
diff --git a/app/EventPaymentModules/DTO/RegistrationSummaryRequest.php b/app/EventPaymentModules/DTO/RegistrationSummaryRequest.php
index 8a00337..9c01183 100644
--- a/app/EventPaymentModules/DTO/RegistrationSummaryRequest.php
+++ b/app/EventPaymentModules/DTO/RegistrationSummaryRequest.php
@@ -2,23 +2,21 @@
 
 namespace App\EventPaymentModules\DTO;
 
-use App\Models\Event;
-use App\ValueObjects\Amount;
+use App\Models\EventParticipant;
 
 /**
  * Eingabe für {@see \App\EventPaymentModules\EventPaymentModule::registrationSummary()}.
  *
- * Bewusst ohne persistierten EventParticipant: Die Zusammenfassung wird im Anmeldefluss VOR dem
- * Absenden erzeugt, es existiert also noch kein Teilnehmer-Datensatz.
+ * Anker ist der (bereits erstellte) Teilnehmer -- daraus leiten die Module Event, Betrag/Restbetrag
+ * und Verwendungszweck ab. $configuration ist die aufgelöste pro-Event-Config des Zahlungsmoduls.
  */
 final class RegistrationSummaryRequest
 {
     /**
-     * @param array<string, mixed> $configuration Aufgelöste (pro-Event-)Konfiguration des Moduls.
+     * @param array<string, mixed> $configuration
      */
     public function __construct(
-        public readonly Event $event,
-        public readonly Amount $amount,
+        public readonly EventParticipant $participant,
         public readonly array $configuration = [],
     ) {
     }
diff --git a/app/EventPaymentModules/DTO/RegistrationSummaryResponse.php b/app/EventPaymentModules/DTO/RegistrationSummaryResponse.php
index 1eaa4b1..6ec6f9b 100644
--- a/app/EventPaymentModules/DTO/RegistrationSummaryResponse.php
+++ b/app/EventPaymentModules/DTO/RegistrationSummaryResponse.php
@@ -5,17 +5,22 @@ namespace App\EventPaymentModules\DTO;
 /**
  * Ausgabe von {@see \App\EventPaymentModules\EventPaymentModule::registrationSummary()}.
  *
- * Strukturierte Daten (kein reines Vue) -- speisen sowohl die Anmelde-Zusammenfassung im Frontend
- * als auch spätere API-Actions. Der obere Teil der Zusammenfassung ist für alle gleich; hier kommt
- * ausschließlich der zahlungsspezifische Abschnitt.
+ * Render-agnostisch: speist den Zahlungs-Abschnitt sowohl im Anmeldeabschluss (Vue) als auch in den Mails.
+ * Zwei Darstellungsformen:
+ *  - strukturierte $lines (label/value) -- z.B. Überweisung (Kontoinhaber, IBAN, Verwendungszweck, Betrag),
+ *  - $html -- frei konfigurierter Text (z.B. Barzahlung).
  */
 final class RegistrationSummaryResponse
 {
-    public string $title = '';
+    /** Gibt es überhaupt einen Zahlungs-Info-Block darzustellen? */
+    public bool $hasPaymentInformation = false;
 
-    /** @var array<int, array{label: string, value: string}> Zeilen des Zahlungs-Abschnitts. */
+    /** @var array<int, array{label: string, value: string}> */
     public array $lines = [];
 
-    /** Bestätigungstext für die Checkbox, z.B. "Ich bestätige, den Betrag von X zu überweisen.". */
-    public ?string $confirmationLabel = null;
+    /** Frei konfigurierter HTML-Text (alternativ zu $lines). */
+    public ?string $html = null;
+
+    /** Soll der GiroCode (QR) angezeigt werden? */
+    public bool $showGiroCode = false;
 }
diff --git a/app/EventPaymentModules/Modules/AccountTransferPaymentModule.php b/app/EventPaymentModules/Modules/AccountTransferPaymentModule.php
index 8bebb25..e5572bb 100644
--- a/app/EventPaymentModules/Modules/AccountTransferPaymentModule.php
+++ b/app/EventPaymentModules/Modules/AccountTransferPaymentModule.php
@@ -4,12 +4,17 @@ namespace App\EventPaymentModules\Modules;
 
 use App\EventPaymentModules\AbstractEventPaymentModule;
 use App\EventPaymentModules\DTO\CreateInvoiceRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
+use App\EventPaymentModules\ProvidesGiroCode;
+use App\Models\EventParticipant;
 use App\Models\PaymentMethod;
+use App\Providers\GiroCodeProvider;
 
 /**
  * Überweisung auf das Veranstaltungskonto -- die Zahlung erfolgt manuell durch die teilnehmende Person.
  */
-class AccountTransferPaymentModule extends AbstractEventPaymentModule
+class AccountTransferPaymentModule extends AbstractEventPaymentModule implements ProvidesGiroCode
 {
     public static function slug(): string
     {
@@ -30,6 +35,50 @@ class AccountTransferPaymentModule extends AbstractEventPaymentModule
         ];
     }
 
+    public function registrationSummary(RegistrationSummaryRequest $request): RegistrationSummaryResponse
+    {
+        $participant = $request->participant;
+        $config = $request->configuration;
+
+        $amountLeft = clone $participant->amount;
+        if ($participant->amount_paid !== null) {
+            $amountLeft->subtractAmount($participant->amount_paid);
+        }
+
+        $response = new RegistrationSummaryResponse();
+        $response->hasPaymentInformation = $amountLeft->getAmount() > 0;
+        $response->showGiroCode = $response->hasPaymentInformation;
+        $response->lines = [
+            ['label' => 'Kontoinhaber', 'value' => (string)($config['account_owner'] ?? '')],
+            ['label' => 'IBAN', 'value' => (string)($config['iban'] ?? '')],
+            ['label' => 'Verwendungszweck', 'value' => (string)$participant->payment_purpose],
+            ['label' => 'Betrag', 'value' => $amountLeft->toString()],
+        ];
+
+        return $response;
+    }
+
+    public function giroCode(EventParticipant $participant, array $configuration): ?string
+    {
+        $amountLeft = clone $participant->amount;
+        if ($participant->amount_paid !== null) {
+            $amountLeft->subtractAmount($participant->amount_paid);
+        }
+
+        if ($amountLeft->getAmount() <= 0) {
+            return null;
+        }
+
+        $provider = new GiroCodeProvider(
+            (string)($configuration['account_owner'] ?? ''),
+            (string)($configuration['iban'] ?? ''),
+            $amountLeft->getAmount(),
+            (string)$participant->payment_purpose,
+        );
+
+        return (string)$provider->create();
+    }
+
     protected function invoiceClosingStatement(CreateInvoiceRequest $request): string
     {
         // TODO: In einer Folge-Iteration ausformulieren (z.B. "Bitte überweise bis zum ... auf IBAN ...").
diff --git a/app/EventPaymentModules/Modules/UndefinedPaymentModule.php b/app/EventPaymentModules/Modules/UndefinedPaymentModule.php
index 16f543d..a84e655 100644
--- a/app/EventPaymentModules/Modules/UndefinedPaymentModule.php
+++ b/app/EventPaymentModules/Modules/UndefinedPaymentModule.php
@@ -4,10 +4,13 @@ namespace App\EventPaymentModules\Modules;
 
 use App\EventPaymentModules\AbstractEventPaymentModule;
 use App\EventPaymentModules\DTO\CreateInvoiceRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
 use App\Models\PaymentMethod;
 
 /**
- * Sonstiges (Barzahlung, Zahlung vor Ort) -- keine konfigurierbaren Optionen, keine aktive Zahlung.
+ * Sonstiges (Barzahlung, Zahlung vor Ort) -- die anzuzeigende Zahlungsinformation ist nutzerdefiniert
+ * (mehrzeiliger Freitext) und wird als Option gepflegt.
  */
 class UndefinedPaymentModule extends AbstractEventPaymentModule
 {
@@ -23,7 +26,21 @@ class UndefinedPaymentModule extends AbstractEventPaymentModule
 
     public function getOptions(): array
     {
-        return [];
+        return [
+            ['name' => 'payment_information', 'label' => 'Zahlungsinformationen', 'type' => 'richtext', 'required' => true],
+        ];
+    }
+
+    public function registrationSummary(RegistrationSummaryRequest $request): RegistrationSummaryResponse
+    {
+        $html = (string)($request->configuration['payment_information'] ?? '');
+
+        $response = new RegistrationSummaryResponse();
+        $response->hasPaymentInformation = trim($html) !== '';
+        $response->html = $html;
+        $response->showGiroCode = false;
+
+        return $response;
     }
 
     protected function invoiceClosingStatement(CreateInvoiceRequest $request): string
diff --git a/app/EventPaymentModules/ProvidesGiroCode.php b/app/EventPaymentModules/ProvidesGiroCode.php
new file mode 100644
index 0000000..ec6bc89
--- /dev/null
+++ b/app/EventPaymentModules/ProvidesGiroCode.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace App\EventPaymentModules;
+
+use App\Models\EventParticipant;
+
+/**
+ * Fähigkeits-Interface (Interface Segregation): Nur Zahlungsarten mit einem GiroCode (SEPA-QR)
+ * implementieren dies -- aktuell ausschließlich die Überweisung. Das Core-Interface
+ * {@see EventPaymentModule} bleibt davon unberührt.
+ */
+interface ProvidesGiroCode
+{
+    /**
+     * Erzeugt den GiroCode (SEPA-QR) als PNG-Binary -- oder null, wenn (z.B. mangels offenem Betrag)
+     * kein GiroCode angeboten wird.
+     *
+     * @param array<string, mixed> $configuration
+     */
+    public function giroCode(EventParticipant $participant, array $configuration): ?string;
+}
diff --git a/app/Http/Controllers/GiroCodeGetController.php b/app/Http/Controllers/GiroCodeGetController.php
index 331bdb7..2341f22 100644
--- a/app/Http/Controllers/GiroCodeGetController.php
+++ b/app/Http/Controllers/GiroCodeGetController.php
@@ -2,8 +2,8 @@
 
 namespace App\Http\Controllers;
 
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\EventParticipant;
-use App\Providers\GiroCodeProvider;
 use Illuminate\Http\Request;
 
 class GiroCodeGetController {
@@ -14,18 +14,16 @@ class GiroCodeGetController {
             return response()->json(['message' => 'Participant not found'], 404);
         }
 
-        $amount = $participant->amount;
-        $amount->subtractAmount($participant->amount_paid);
+        // Die GiroCode-Erzeugung gehört zum Zahlungsmodul; ohne diese Fähigkeit (z.B. Barzahlung) -> 404.
+        $module = $participant->paymentModule();
+        $girocode = $module instanceof ProvidesGiroCode
+            ? $module->giroCode($participant, $participant->paymentConfiguration())
+            : null;
 
-        $girocodeProvider = new GiroCodeProvider(
-            $participant->event()->first()->account_owner,
-            $participant->event()->first()->account_iban,
-            $participant->amount->getAmount(),
-            $participant->payment_purpose
-        );
+        if ($girocode === null) {
+            return response()->json(['message' => 'No giro code for this payment method'], 404);
+        }
 
-        return response($girocodeProvider->create(),    200,
-            ['Content-Type' => 'image/png']
-        );
+        return response($girocode, 200, ['Content-Type' => 'image/png']);
     }
 }
diff --git a/app/Mail/ParticipantParticipationMails/EventSignUpSuccessfullMail.php b/app/Mail/ParticipantParticipationMails/EventSignUpSuccessfullMail.php
index f100483..84c5637 100644
--- a/app/Mail/ParticipantParticipationMails/EventSignUpSuccessfullMail.php
+++ b/app/Mail/ParticipantParticipationMails/EventSignUpSuccessfullMail.php
@@ -8,6 +8,7 @@ use App\Domains\Event\Actions\GenerateIcal\GenerateIcalResponse;
 use App\Domains\Event\Actions\GenerateIcalForDeadline\GenerateIcalForDeadlineCommand;
 use App\Domains\Event\Actions\GenerateIcalForDeadline\GenerateIcalForDeadlineRequest;
 use App\Domains\Event\Actions\GenerateIcalForDeadline\GenerateIcalForDeadlineResponse;
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\EventParticipant;
 use Illuminate\Bus\Queueable;
 use Illuminate\Http\Request;
@@ -62,13 +63,10 @@ class EventSignUpSuccessfullMail extends Mailable
         $event = $this->participant->event()->first()->toResource()->toArray(new Request());
         $participant = $this->participant->toResource()->toArray(new Request());
 
-        $girocodeProvider = new \App\Providers\GiroCodeProvider(
-            $event['accountOwner'],
-            $event['accountIban'],
-            (float) $participant['amount_left_value'],
-            $participant['payment_purpose']
-        );
-        $girocodeBinary = (string)$girocodeProvider->create();
+        $module = $this->participant->paymentModule();
+        $girocodeBinary = $module instanceof ProvidesGiroCode
+            ? $module->giroCode($this->participant, $this->participant->paymentConfiguration())
+            : null;
 
         $participationIcal = $this->getParticipationIcal();
         $deadlineIcal = $this->getDeadlineIcal();
@@ -85,10 +83,7 @@ class EventSignUpSuccessfullMail extends Mailable
                 'departure' => $participant['departure'],
                 'amount' => $participant['amount_left_string'],
                 'paymentFinalDate' => $event['registrationFinalEnd']['formatted'],
-                'paymentRequired' => $participant['needs_payment'],
-                'accountOwner' => $event['accountOwner'],
-                'accountIban' => $event['accountIban'],
-                'paymentPurpose' => $participant['payment_purpose'],
+                'paymentSummary' => $participant['paymentSummary'],
                 'girocodeBinary' => $girocodeBinary,
                 'efzStatus' => $participant['efz_status'],
                 'participationIcalFilename' => $participationIcal->filename,
diff --git a/app/Mail/ParticipantPaymentMails/ParticipantPaymentMissingPaymentMail.php b/app/Mail/ParticipantPaymentMails/ParticipantPaymentMissingPaymentMail.php
index 035421a..0594a09 100644
--- a/app/Mail/ParticipantPaymentMails/ParticipantPaymentMissingPaymentMail.php
+++ b/app/Mail/ParticipantPaymentMails/ParticipantPaymentMissingPaymentMail.php
@@ -2,6 +2,7 @@
 
 namespace App\Mail\ParticipantPaymentMails;
 
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\EventParticipant;
 use Illuminate\Http\Request;
 use Illuminate\Mail\Mailable;
@@ -45,13 +46,10 @@ class ParticipantPaymentMissingPaymentMail extends Mailable
         $event = $this->participant->event()->first()->toResource()->toArray(new Request());
         $participant = $this->participant->toResource()->toArray(new Request());
 
-        $girocodeProvider = new \App\Providers\GiroCodeProvider(
-            $event['accountOwner'],
-            $event['accountIban'],
-            (float) $participant['amount_left_value'],
-            $participant['payment_purpose']
-        );
-        $girocodeBinary = (string)$girocodeProvider->create();
+        $module = $this->participant->paymentModule();
+        $girocodeBinary = $module instanceof ProvidesGiroCode
+            ? $module->giroCode($this->participant, $this->participant->paymentConfiguration())
+            : null;
 
         return new Content(
             view: 'emails.participantPayments.missing_amount',
@@ -64,10 +62,7 @@ class ParticipantPaymentMissingPaymentMail extends Mailable
                 'departure' => $participant['departure'],
                 'amount' => $participant['amount_left_string'],
                 'paymentFinalDate' => $event['registrationFinalEnd']['formatted'],
-                'paymentRequired' => $participant['needs_payment'],
-                'accountOwner' => $event['accountOwner'],
-                'accountIban' => $event['accountIban'],
-                'paymentPurpose' => $participant['payment_purpose'],
+                'paymentSummary' => $participant['paymentSummary'],
                 'girocodeBinary' => $girocodeBinary,
             ],
         );
diff --git a/app/Models/EventParticipant.php b/app/Models/EventParticipant.php
index dc39eeb..56bc672 100644
--- a/app/Models/EventParticipant.php
+++ b/app/Models/EventParticipant.php
@@ -8,8 +8,11 @@ use App\Enumerations\EfzStatus;
 use App\Enumerations\FirstAidPermission;
 use App\Enumerations\ParticipationType;
 use App\Enumerations\SwimmingPermission;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
+use App\EventPaymentModules\EventPaymentModule;
+use App\EventPaymentModules\EventPaymentModuleRegistry;
 use App\Scopes\InstancedModel;
-use Illuminate\Database\Eloquent\Builder;
 
 
 class EventParticipant extends InstancedModel
@@ -166,4 +169,47 @@ class EventParticipant extends InstancedModel
         return $this->nickname ?? $this->firstname;
     }
 
+    /*
+    |--------------------------------------------------------------------------
+    | Zahlungsmodul
+    |--------------------------------------------------------------------------
+    */
+
+    /** Das Zahlungsmodul der gewählten Zahlungsart des Teilnehmers. */
+    public function paymentModule(): ?EventPaymentModule
+    {
+        return $this->payment_method !== null
+            ? EventPaymentModuleRegistry::forSlug($this->payment_method)
+            : null;
+    }
+
+    /**
+     * Aufgelöste pro-Event-Konfiguration der gewählten Zahlungsart (event_payment_methods.configuration).
+     *
+     * Nutzt die Relation-Property, damit sie via `->with('event.paymentMethods')` eager geladen und in
+     * Teilnehmerlisten (gleiches Event teilt dieselbe Event-Instanz) ohne N+1 aufgelöst werden kann.
+     *
+     * @return array<string, mixed>
+     */
+    public function paymentConfiguration(): array
+    {
+        if ($this->payment_method === null) {
+            return [];
+        }
+
+        $method = $this->event?->paymentMethods->firstWhere('slug', $this->payment_method);
+
+        return $method?->pivot->configuration ?? [];
+    }
+
+    /** Zahlungs-Zusammenfassung (Anmeldeabschluss/Mail), vom Zahlungsmodul erzeugt. */
+    public function paymentSummary(): RegistrationSummaryResponse
+    {
+        $module = $this->paymentModule();
+        if ($module === null) {
+            return new RegistrationSummaryResponse();
+        }
+
+        return $module->registrationSummary(new RegistrationSummaryRequest($this, $this->paymentConfiguration()));
+    }
 }
diff --git a/app/Resources/EventParticipantResource.php b/app/Resources/EventParticipantResource.php
index 5d19f12..6b037eb 100644
--- a/app/Resources/EventParticipantResource.php
+++ b/app/Resources/EventParticipantResource.php
@@ -27,6 +27,8 @@ class EventParticipantResource extends JsonResource
             $amountLeft->subtractAmount($this->resource->amount_paid);
         }
 
+        $paymentSummary = $this->resource->paymentSummary();
+
         $presenceDays = $this->resource->arrival_date->diff($this->resource->departure_date)->days;
         if ($presenceDays === 0) {
             $presenceDays = 1;
@@ -57,6 +59,12 @@ class EventParticipantResource extends JsonResource
                 'needs_payment' => $this->resource->amount->getAmount() > 0
                     && $this->resource->payment_method === PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION
                     && $this->resource->amount_paid?->getAmount() < $this->resource->amount->getAmount(),
+                'paymentSummary' => [
+                    'hasPaymentInformation' => $paymentSummary->hasPaymentInformation,
+                    'lines' => $paymentSummary->lines,
+                    'html' => $paymentSummary->html,
+                    'showGiroCode' => $paymentSummary->showGiroCode,
+                ],
                 'nicename' => $this->resource->getNicename(),
                 'arrival' => $this->resource->arrival_date->format('d.m.Y'),
                 'departure' => $this->resource->departure_date->format('d.m.Y'),
diff --git a/resources/views/emails/events/signup_complete.blade.php b/resources/views/emails/events/signup_complete.blade.php
index 2c0b571..4c7b229 100644
--- a/resources/views/emails/events/signup_complete.blade.php
+++ b/resources/views/emails/events/signup_complete.blade.php
@@ -38,15 +38,19 @@
     </tr>
 </table>
 
-@if ($paymentRequired)
-    <p>
-        Deine Teilnahme ist <strong>noch nicht bestätigt,</strong> da dsies erst nach vollständigem Zahlungseingang der
-        Fall ist.
-        Bitte zahle den Betrag in Höhe von <strong>{{$amount}}</strong> bis zum <strong>{{$paymentFinalDate}},</strong>
-        da andernfalls die Stornierung deiner Anmeldung erfolgen kann.
+@if ($paymentSummary['hasPaymentInformation'])
+    @if ($paymentSummary['showGiroCode'])
+        <p>
+            Deine Teilnahme ist <strong>noch nicht bestätigt,</strong> da dsies erst nach vollständigem Zahlungseingang
+            der
+            Fall ist.
+            Bitte zahle den Betrag in Höhe von <strong>{{$amount}}</strong> bis zum <strong>{{$paymentFinalDate}}
+                ,</strong>
+            da andernfalls die Stornierung deiner Anmeldung erfolgen kann.
 
-        Um deine Anmeldung zu vervollständigen, überweise den Betrag bitte zugunsten folgender Bankverbindung:
-    </p>
+            Um deine Anmeldung zu vervollständigen, überweise den Betrag bitte zugunsten folgender Bankverbindung:
+        </p>
+    @endif
 
     <p>
         @include('emails.subparts.payment')<br />
diff --git a/resources/views/emails/participantPayments/missing_amount.blade.php b/resources/views/emails/participantPayments/missing_amount.blade.php
index 4ec5730..2379fd1 100644
--- a/resources/views/emails/participantPayments/missing_amount.blade.php
+++ b/resources/views/emails/participantPayments/missing_amount.blade.php
@@ -36,7 +36,7 @@
     </tr>
 </table>
 
-@if ($paymentRequired)
+@if ($paymentSummary['hasPaymentInformation'] && $paymentSummary['showGiroCode'])
     <p>
         Wahrscheinlich hast du vergessen, deinen Teilnahmebeitrag zu überweisen, sodass deine Anmeldung leider <strong>noch nicht bestätigt,</strong> werden konnte.
 
diff --git a/resources/views/emails/subparts/payment.blade.php b/resources/views/emails/subparts/payment.blade.php
index 32b0811..cf6dd19 100644
--- a/resources/views/emails/subparts/payment.blade.php
+++ b/resources/views/emails/subparts/payment.blade.php
@@ -1,72 +1,58 @@
-<table cellpadding="0" cellspacing="0" border="0"
-       style="width: 100%; max-width: 640px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; color: #1f2937;">
-    <tr>
-        <td style="padding: 8px 12px; width: 180px; font-weight: 600; color: #4b5563; border-bottom: 1px solid #e5e7eb;">
-            Kontoinhaber*in
-        </td>
-        <td style="padding: 8px 12px; border-bottom: 1px solid #e5e7eb;">
-            {{ $accountOwner }}
-        </td>
-    </tr>
-    <tr>
-        <td style="padding: 8px 12px; font-weight: 600; color: #4b5563; border-bottom: 1px solid #e5e7eb;">
-            IBAN
-        </td>
-        <td style="padding: 8px 12px; border-bottom: 1px solid #e5e7eb; font-family: monospace;">
-            {{ $accountIban }}
-        </td>
-    </tr>
-    <tr>
-        <td style="padding: 8px 12px; font-weight: 600; color: #4b5563; border-bottom: 1px solid #e5e7eb;">
-            Verwendungszweck
-        </td>
-        <td style="padding: 8px 12px; border-bottom: 1px solid #e5e7eb;">
-            {{ $paymentPurpose }}
-        </td>
-    </tr>
-    <tr>
-        <td style="padding: 10px 12px; font-weight: 700; color: #111827; border-top: 2px solid #d1d5db;">
-            Betrag
-        </td>
-        <td style="padding: 10px 12px; font-weight: 700; color: #111827; border-top: 2px solid #d1d5db;">
-            {{ $amount }}
-        </td>
-    </tr>
-</table>
+{{-- Zahlungs-Info-Block aus dem Zahlungsmodul ($paymentSummary). Entweder freier HTML-Text
+     (z.B. Barzahlung) oder strukturierte Zeilen (z.B. Überweisung) inkl. optionalem GiroCode. --}}
+@if (!empty($paymentSummary['html']))
+    {!! $paymentSummary['html'] !!}
+@else
+    <table cellpadding="0" cellspacing="0" border="0"
+           style="width: 100%; max-width: 640px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; color: #1f2937;">
+        @foreach ($paymentSummary['lines'] as $line)
+            <tr>
+                <td style="padding: {{ $loop->last ? '10px' : '8px' }} 12px; width: 180px; font-weight: {{ $loop->last ? '700' : '600' }}; color: {{ $loop->last ? '#111827' : '#4b5563' }}; border-{{ $loop->last ? 'top: 2px solid #d1d5db' : 'bottom: 1px solid #e5e7eb' }};">
+                    {{ $line['label'] }}
+                </td>
+                <td style="padding: {{ $loop->last ? '10px' : '8px' }} 12px; font-weight: {{ $loop->last ? '700' : '400' }}; color: {{ $loop->last ? '#111827' : '#1f2937' }}; border-{{ $loop->last ? 'top: 2px solid #d1d5db' : 'bottom: 1px solid #e5e7eb' }};">
+                    {{ $line['value'] }}
+                </td>
+            </tr>
+        @endforeach
+    </table>
 
-@php
-    $girocodeSrc = $message->embedData($girocodeBinary, 'girocode.png', 'image/png');
-@endphp
-<table style="margin: 20px;">
-    <tr style="vertical-align: top; background-color: #eaeaea; border-spacing: 0">
+    @if (!empty($paymentSummary['showGiroCode']))
+        @php
+            $girocodeSrc = $message->embedData($girocodeBinary, 'girocode.png', 'image/png');
+        @endphp
+        <table style="margin: 20px;">
+            <tr style="vertical-align: top; background-color: #eaeaea; border-spacing: 0">
+                <td style="padding: 20px; text-align: center; font-weight: bold;">
+                    <strong>
+                        Bequem überweisen mit QR-Code
+                    </strong><br/><br/>
 
-        <td style="padding: 20px; text-align: center; font-weight: bold;">
-            <strong>
-                Bequem überweisen mit QR-Code
-            </strong><br/><br/>
+                    <img
+                        style="padding-left: 20px;width: 150px; height: 150px;"
+                        src="{{ $girocodeSrc }}"
+                        alt="Giro-Code">
+                </td>
+                <td>
+                    <p style="padding-left:10px; padding-right: 10px; text-align: left;">
+                        <strong>Und so funktioniert es</strong><br/>
+                    <ul style="text-align: left; list-style: decimal; font-weight: normal">
+                        <li style="padding-right: 10px;">Mache einen Screenshot des QR-Codes</li>
+                        <li style="padding-right: 10px;">Öffne deine Banking-App und wähle den Menüpunkt
+                            „(Foto-)Überweisung“.
+                        </li>
+                        <li style="padding-right: 10px;">Wähle das gespeicherte Bild aus</li>
+                    </ul>
+                    </p>
+                </td>
+            </tr>
+        </table>
 
-            <img
-                style="padding-left: 20px;width: 150px; height: 150px;"
-                src="{{ $girocodeSrc }}"
-                alt="Giro-Code">
-        </td>
-        <td>
-            <p style="padding-left:10px; padding-right: 10px; text-align: left;">
-                <strong>Und so funktioniert es</strong><br/>
-                <ul style="text-align: left; list-style: decimal; font-weight: normal">
-                    <li style="padding-right: 10px;">Mache einen Screenshot des QR-Codes</li>
-                    <li style="padding-right: 10px;">Öffne deine Banking-App und wähle den Menüpunkt
-                        „(Foto-)Überweisung“.
-                    </li>
-                    <li style="padding-right: 10px;">Wähle das gespeicherte Bild aus</li>
-                </ul>
-            </p>
-        </td>
-    </tr>
-</table>
-
-<p>
-    Bitte zahle immer mit dem vorgegeben Betreff, damit deine Zahlung möglichst einfach zugeordnet werden kann.<br/>
-    Sollte die Zahlung innerhalb dieser Frist nicht oder nur teilweise möglich sein, kontaktiere bitte die
-    Aktionsleitung, sodass wir eine gemeinsame Lösung finden können.
-</p>
+        <p>
+            Bitte zahle immer mit dem vorgegeben Betreff, damit deine Zahlung möglichst einfach zugeordnet werden
+            kann.<br/>
+            Sollte die Zahlung innerhalb dieser Frist nicht oder nur teilweise möglich sein, kontaktiere bitte die
+            Aktionsleitung, sodass wir eine gemeinsame Lösung finden können.
+        </p>
+    @endif
+@endif
diff --git a/tests/Feature/EventParticipantPaymentSummaryTest.php b/tests/Feature/EventParticipantPaymentSummaryTest.php
new file mode 100644
index 0000000..7a13947
--- /dev/null
+++ b/tests/Feature/EventParticipantPaymentSummaryTest.php
@@ -0,0 +1,147 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Enumerations\EatingHabit;
+use App\Enumerations\EfzStatus;
+use App\Enumerations\FirstAidPermission;
+use App\Enumerations\ParticipationType;
+use App\Enumerations\SwimmingPermission;
+use App\EventPaymentModules\ProvidesGiroCode;
+use App\Models\AvailablePaymentMethod;
+use App\Models\Event;
+use App\Models\EventParticipant;
+use App\Models\PaymentMethod;
+use App\Models\Tenant;
+use App\RelationModels\EventPaymentMethods;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\DB;
+use Tests\TestCase;
+
+class EventParticipantPaymentSummaryTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private Tenant $tenant;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->tenant = Tenant::create([
+            'slug' => 'tv', 'name' => 'Test', 'email' => 't@example.com', 'email_finance' => 'f@example.com',
+            'url' => 'test.local', 'account_name' => 'Test e.V.', 'account_iban' => 'DE00', 'account_bic' => 'XY',
+            'city' => 'Stadt', 'postcode' => '00000', 'is_active_local_group' => true, 'has_active_instance' => true,
+        ]);
+        app()->instance('tenant', $this->tenant);
+
+        PaymentMethod::create(['slug' => PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION]);
+        PaymentMethod::create(['slug' => PaymentMethod::PAYMENT_NOT_DEFINED]);
+
+        DB::table('participation_fee_types')->insert(['slug' => 'FIXED', 'name' => 'Fixed', 'created_at' => now(), 'updated_at' => now()]);
+        ParticipationType::create(['slug' => ParticipationType::PARTICIPATION_TYPE_PARTICIPANT, 'name' => 'Teilnehmende']);
+        EfzStatus::create(['slug' => EfzStatus::EFZ_STATUS_NOT_CHECKED, 'name' => 'Nicht geprüft']);
+        SwimmingPermission::create(['slug' => SwimmingPermission::SWIMMING_PERMISSION_ALLOWED, 'name' => 'Darf baden', 'short' => 'Erteilt']);
+        FirstAidPermission::create(['slug' => FirstAidPermission::FIRST_AID_PERMISSION_ALLOWED, 'name' => 'Zugestimmt', 'description' => '']);
+        EatingHabit::create(['slug' => EatingHabit::EATING_HABIT_OMNIVOR, 'name' => 'Omnivor']);
+    }
+
+    private function createEventWithTransfer(array $config): Event
+    {
+        $event = Event::create([
+            'tenant' => $this->tenant->slug, 'name' => 'Event', 'identifier' => 'evt-1', 'location' => 'Ort',
+            'postal_code' => '00000', 'email' => 'e@example.com', 'start_date' => '2026-08-01', 'end_date' => '2026-08-05',
+            'early_bird_end' => '2026-07-01', 'registration_final_end' => '2026-07-20', 'early_bird_end_amount_increase' => 0,
+            'account_owner' => 'Owner', 'account_iban' => 'DE00', 'participation_fee_type' => 'FIXED',
+            'pay_per_day' => false, 'pay_direct' => false,
+        ]);
+
+        AvailablePaymentMethod::create([
+            'tenant' => $this->tenant->slug, 'slug' => PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION,
+            'name' => 'Überweisung', 'active' => true, 'configuration' => $config,
+        ]);
+
+        EventPaymentMethods::create([
+            'event_id' => $event->id,
+            'slug' => PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION,
+            'configuration' => $config,
+        ]);
+
+        return $event;
+    }
+
+    private function createParticipant(Event $event, float $amount, string $paymentMethod = PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION): EventParticipant
+    {
+        return EventParticipant::create([
+            'tenant' => $this->tenant->slug, 'event_id' => $event->id, 'identifier' => 'p-1',
+            'firstname' => 'Hans', 'lastname' => 'Muster', 'participation_type' => ParticipationType::PARTICIPATION_TYPE_PARTICIPANT,
+            'birthday' => '2000-01-01', 'address_1' => 'Weg 1', 'postcode' => '00000', 'city' => 'Stadt',
+            'email_1' => 'h@example.com', 'phone_1' => '123', 'arrival_date' => '2026-08-01', 'departure_date' => '2026-08-05',
+            'arrival_eating' => 0, 'departure_eating' => 0, 'amount' => $amount, 'payment_purpose' => 'Event - Beitrag Hans Muster',
+            'efz_status' => EfzStatus::EFZ_STATUS_NOT_CHECKED, 'payment_method' => $paymentMethod,
+            'swimming_permission' => SwimmingPermission::SWIMMING_PERMISSION_ALLOWED,
+            'first_aid_permission' => FirstAidPermission::FIRST_AID_PERMISSION_ALLOWED,
+            'eating_habit' => EatingHabit::EATING_HABIT_OMNIVOR,
+        ]);
+    }
+
+    public function test_transfer_module_produces_giro_code(): void
+    {
+        $event = $this->createEventWithTransfer(['account_owner' => 'Kasse', 'iban' => 'DE-EVENT']);
+        $participant = $this->createParticipant($event, 50.0);
+
+        $module = $participant->paymentModule();
+        $this->assertInstanceOf(ProvidesGiroCode::class, $module);
+
+        $giro = $module->giroCode($participant, $participant->paymentConfiguration());
+        $this->assertNotNull($giro);
+        $this->assertNotSame('', $giro);
+    }
+
+    public function test_cash_module_provides_no_giro_code(): void
+    {
+        $event = $this->createEventWithTransfer(['account_owner' => 'Kasse', 'iban' => 'DE-EVENT']);
+        $participant = $this->createParticipant($event, 50.0, PaymentMethod::PAYMENT_NOT_DEFINED);
+
+        $this->assertNotInstanceOf(ProvidesGiroCode::class, $participant->paymentModule());
+    }
+
+    public function test_payment_configuration_resolves_event_pivot_config(): void
+    {
+        $event = $this->createEventWithTransfer(['account_owner' => 'Kasse', 'iban' => 'DE-EVENT']);
+        $participant = $this->createParticipant($event, 50.0);
+
+        $config = $participant->paymentConfiguration();
+
+        $this->assertSame('DE-EVENT', $config['iban']);
+        $this->assertSame('Kasse', $config['account_owner']);
+    }
+
+    public function test_payment_summary_builds_lines_from_resolved_config(): void
+    {
+        $event = $this->createEventWithTransfer(['account_owner' => 'Kasse', 'iban' => 'DE-EVENT']);
+        $participant = $this->createParticipant($event, 50.0);
+
+        $summary = $participant->paymentSummary();
+
+        $this->assertTrue($summary->hasPaymentInformation);
+        $this->assertTrue($summary->showGiroCode);
+
+        $byLabel = [];
+        foreach ($summary->lines as $line) {
+            $byLabel[$line['label']] = $line['value'];
+        }
+        $this->assertSame('DE-EVENT', $byLabel['IBAN']);
+    }
+
+    public function test_resource_exposes_payment_summary(): void
+    {
+        $event = $this->createEventWithTransfer(['account_owner' => 'Kasse', 'iban' => 'DE-EVENT']);
+        $participant = $this->createParticipant($event, 50.0);
+
+        $array = $participant->toResource()->toArray(request());
+
+        $this->assertTrue($array['paymentSummary']['hasPaymentInformation']);
+        $this->assertTrue($array['paymentSummary']['showGiroCode']);
+    }
+}
diff --git a/tests/Unit/EventPaymentModuleRegistryTest.php b/tests/Unit/EventPaymentModuleRegistryTest.php
index 80449aa..ced99af 100644
--- a/tests/Unit/EventPaymentModuleRegistryTest.php
+++ b/tests/Unit/EventPaymentModuleRegistryTest.php
@@ -5,6 +5,7 @@ namespace Tests\Unit;
 use App\EventPaymentModules\EventPaymentModuleRegistry;
 use App\EventPaymentModules\Modules\AccountTransferPaymentModule;
 use App\EventPaymentModules\Modules\UndefinedPaymentModule;
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\PaymentMethod;
 use PHPUnit\Framework\TestCase;
 
@@ -49,6 +50,12 @@ class EventPaymentModuleRegistryTest extends TestCase
         $this->assertTrue($module->isConfigurationComplete(['iban' => 'DE123', 'account_owner' => 'Kasse']));
     }
 
+    public function test_only_account_transfer_provides_giro_code(): void
+    {
+        $this->assertInstanceOf(ProvidesGiroCode::class, new AccountTransferPaymentModule());
+        $this->assertNotInstanceOf(ProvidesGiroCode::class, new UndefinedPaymentModule());
+    }
+
     public function test_defaults_are_built_from_modules(): void
     {
         $defaults = PaymentMethod::defaults();
diff --git a/tests/Unit/PaymentMethodOptionsTest.php b/tests/Unit/PaymentMethodOptionsTest.php
index 5c95f00..34b210e 100644
--- a/tests/Unit/PaymentMethodOptionsTest.php
+++ b/tests/Unit/PaymentMethodOptionsTest.php
@@ -52,8 +52,9 @@ class PaymentMethodOptionsTest extends TestCase
         $this->assertTrue(PaymentMethod::isConfigurationComplete($slug, ['iban' => 'DE123', 'account_owner' => 'Kasse']));
     }
 
-    public function test_slug_without_options_is_always_complete(): void
+    public function test_unknown_slug_is_always_complete(): void
     {
-        $this->assertTrue(PaymentMethod::isConfigurationComplete(PaymentMethod::PAYMENT_NOT_DEFINED, []));
+        // Kein Modul -> keine Pflichtfelder -> stets vollständig.
+        $this->assertTrue(PaymentMethod::isConfigurationComplete('NO_MODULE', []));
     }
 }
diff --git a/tests/Unit/RegistrationSummaryTest.php b/tests/Unit/RegistrationSummaryTest.php
new file mode 100644
index 0000000..46d8d59
--- /dev/null
+++ b/tests/Unit/RegistrationSummaryTest.php
@@ -0,0 +1,96 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\Modules\AccountTransferPaymentModule;
+use App\EventPaymentModules\Modules\UndefinedPaymentModule;
+use App\Models\EventParticipant;
+use App\ValueObjects\Amount;
+use PHPUnit\Framework\TestCase;
+
+class RegistrationSummaryTest extends TestCase
+{
+    private function participant(float $amount, float $amountPaid, string $purpose = 'Zweck'): EventParticipant
+    {
+        $participant = new EventParticipant();
+        $participant->setRawAttributes([
+            'payment_purpose' => $purpose,
+        ], true);
+        // Amount-Casts umgehen und die Value-Objects direkt setzen.
+        $participant->amount = new Amount($amount, ' Euro');
+        $participant->amount_paid = new Amount($amountPaid, ' Euro');
+
+        return $participant;
+    }
+
+    public function test_account_transfer_summary_builds_lines_from_config(): void
+    {
+        $module = new AccountTransferPaymentModule();
+        $request = new RegistrationSummaryRequest(
+            $this->participant(50.0, 0.0, 'Camp - Beitrag'),
+            ['account_owner' => 'Kasse', 'iban' => 'DE123', 'bic' => 'XY'],
+        );
+
+        $summary = $module->registrationSummary($request);
+
+        $this->assertTrue($summary->hasPaymentInformation);
+        $this->assertTrue($summary->showGiroCode);
+        $this->assertNull($summary->html);
+
+        $byLabel = [];
+        foreach ($summary->lines as $line) {
+            $byLabel[$line['label']] = $line['value'];
+        }
+        $this->assertSame('Kasse', $byLabel['Kontoinhaber']);
+        $this->assertSame('DE123', $byLabel['IBAN']);
+        $this->assertSame('Camp - Beitrag', $byLabel['Verwendungszweck']);
+        $this->assertArrayHasKey('Betrag', $byLabel);
+    }
+
+    public function test_account_transfer_without_open_amount_has_no_payment_information(): void
+    {
+        $module = new AccountTransferPaymentModule();
+        $summary = $module->registrationSummary(new RegistrationSummaryRequest(
+            $this->participant(50.0, 50.0),
+            ['account_owner' => 'Kasse', 'iban' => 'DE123'],
+        ));
+
+        $this->assertFalse($summary->hasPaymentInformation);
+        $this->assertFalse($summary->showGiroCode);
+    }
+
+    public function test_cash_summary_returns_configured_html(): void
+    {
+        $module = new UndefinedPaymentModule();
+        $summary = $module->registrationSummary(new RegistrationSummaryRequest(
+            $this->participant(50.0, 0.0),
+            ['payment_information' => '<p>Bitte bar vor Ort zahlen.</p>'],
+        ));
+
+        $this->assertTrue($summary->hasPaymentInformation);
+        $this->assertFalse($summary->showGiroCode);
+        $this->assertSame('<p>Bitte bar vor Ort zahlen.</p>', $summary->html);
+        $this->assertSame([], $summary->lines);
+    }
+
+    public function test_cash_summary_empty_when_no_text_configured(): void
+    {
+        $module = new UndefinedPaymentModule();
+        $summary = $module->registrationSummary(new RegistrationSummaryRequest(
+            $this->participant(50.0, 0.0),
+            [],
+        ));
+
+        $this->assertFalse($summary->hasPaymentInformation);
+    }
+
+    public function test_cash_module_requires_payment_information_option(): void
+    {
+        $module = new UndefinedPaymentModule();
+
+        $this->assertSame(['payment_information'], $module->requiredOptionKeys());
+        $this->assertFalse($module->isConfigurationComplete([]));
+        $this->assertTrue($module->isConfigurationComplete(['payment_information' => '<p>Text</p>']));
+    }
+}