feat(checkout): show transfer candidate issue

src/app/core/services/checkout.service.ts

@@ -74,6 +74,28 @@ export interface PurchaseStatusResponse {
   expires_at: string | null;
   expires_in_seconds: number | null;
   server_time: string;
+  payment_verification?: PurchasePaymentVerificationResponse;
+}
+
+export type PurchasePaymentCandidateReason =
+  | 'ambiguous_exact_match'
+  | 'exact_dni_near_amount'
+  | 'exact_amount_different_dni';
+
+export interface PurchasePaymentCandidatePrimaryResponse {
+  reason: PurchasePaymentCandidateReason;
+  payment_amount: string;
+  purchase_amount: string;
+  amount_difference: string;
+  confidence: 'exact' | 'high' | 'medium';
+  detected_at: string | null;
+}
+
+export interface PurchasePaymentVerificationResponse {
+  status: 'pending' | 'candidate';
+  candidate_count: number;
+  primary: PurchasePaymentCandidatePrimaryResponse | null;
+  reasons: PurchasePaymentCandidateReason[];
 }
 
 export interface PurchaseSummaryResponse extends PurchaseStatusResponse {

src/app/features/store/pages/purchase-status-page/purchase-status-page.component.html

@@ -17,7 +17,9 @@
 
     <div class="status-content__section status-content__section--secondary">
       @if (ticketsRoute()) {
-        <p class="status-content__message">A continuación, vas a poder ver los tickets que debés presentar en el evento.</p>
+        <p class="status-content__message">
+          A continuación, vas a poder ver los tickets que debés presentar en el evento.
+        </p>
 
         <app-button
           type="button"
@@ -29,7 +31,9 @@
           <span>Mis tickets</span>
         </app-button>
       } @else if (whatsappUrl()) {
-        <p class="status-content__message">Comunicate con nosotros para coordinar el env&iacute;o.</p>
+        <p class="status-content__message">
+          Comunicate con nosotros para coordinar el env&iacute;o.
+        </p>
 
         <app-button
           type="button"
@@ -51,13 +55,21 @@
         <i class="fa-solid fa-clock"></i>
       </div>
       <h2 class="status-content__title">ESTAMOS VERIFICANDO TU PAGO</h2>
-      <p class="status-content__subtitle">Tu compra ya fue registrada y estamos esperando la confirmaci&oacute;n del pago.</p>
+      <p class="status-content__subtitle">
+        Tu compra ya fue registrada y estamos esperando la confirmaci&oacute;n del pago.
+      </p>
     </div>
 
     <hr class="status-content__divider" />
 
     <div class="status-content__section status-content__section--secondary">
-      <p class="status-content__message">Te avisaremos cuando el pago sea confirmado.</p>
+      @if (paymentIssueMessage()) {
+        <p class="status-content__message">
+          {{ paymentIssueMessage() }} Estamos revisando el pago.
+        </p>
+      } @else {
+        <p class="status-content__message">Te avisaremos cuando el pago sea confirmado.</p>
+      }
     </div>
   } @else if (status() === 'expired') {
     <div class="status-content__section status-content__section--primary">
@@ -65,13 +77,17 @@
         <i class="fa-solid fa-clock"></i>
       </div>
       <h2 class="status-content__title">LA COMPRA VENCI&Oacute;</h2>
-      <p class="status-content__subtitle">El plazo de pago termin&oacute; y liberamos el stock reservado.</p>
+      <p class="status-content__subtitle">
+        El plazo de pago termin&oacute; y liberamos el stock reservado.
+      </p>
     </div>
 
     <hr class="status-content__divider" />
 
     <div class="status-content__section status-content__section--secondary">
-      <p class="status-content__message">Pod&eacute;s volver a la tienda e iniciar una nueva compra.</p>
+      <p class="status-content__message">
+        Pod&eacute;s volver a la tienda e iniciar una nueva compra.
+      </p>
     </div>
   } @else if (status() === 'rejected') {
     <div class="status-content__section status-content__section--primary">
@@ -79,7 +95,9 @@
         <i class="fa-solid fa-triangle-exclamation"></i>
       </div>
       <h2 class="status-content__title">NO PUDIMOS CONFIRMAR EL PAGO</h2>
-      <p class="status-content__subtitle">Revis&aacute; el medio de pago o comunicate con nosotros para continuar.</p>
+      <p class="status-content__subtitle">
+        Revis&aacute; el medio de pago o comunicate con nosotros para continuar.
+      </p>
     </div>
 
     <hr class="status-content__divider" />
@@ -114,7 +132,9 @@
     <hr class="status-content__divider" />
 
     <div class="status-content__section status-content__section--secondary">
-      <p class="status-content__message">Volv&eacute; a ingresar m&aacute;s tarde. Si el problema sigue, comunicate con nosotros.</p>
+      <p class="status-content__message">
+        Volv&eacute; a ingresar m&aacute;s tarde. Si el problema sigue, comunicate con nosotros.
+      </p>
 
       @if (whatsappUrl()) {
         <div class="status-content__actions">

src/app/features/store/pages/purchase-status-page/purchase-status-page.component.spec.ts

@@ -67,9 +67,13 @@ describe('PurchaseStatusPageComponent', () => {
     TestBed.resetTestingModule();
   });
 
-  async function render(hasGeneratedTickets: boolean, forcedStatus?: string) {
+  async function render(
+    hasGeneratedTickets: boolean,
+    forcedStatus?: string,
+    purchaseResponse = purchase(hasGeneratedTickets),
+  ) {
     const checkoutService = {
-      getPurchase: vi.fn().mockResolvedValue(purchase(hasGeneratedTickets)),
+      getPurchase: vi.fn().mockResolvedValue(purchaseResponse),
       withCustomLoading() {
         return this;
       },
@@ -91,9 +95,7 @@ describe('PurchaseStatusPageComponent', () => {
           useValue: {
             snapshot: {
               paramMap: convertToParamMap({ id: '42' }),
-              queryParamMap: convertToParamMap(
+              queryParamMap: convertToParamMap(forcedStatus ? { status: forcedStatus } : {}),
-                forcedStatus ? { status: forcedStatus } : {},
-              ),
             },
           },
         },
@@ -159,6 +161,29 @@ describe('PurchaseStatusPageComponent', () => {
     expect(checkoutService.getPurchase).not.toHaveBeenCalled();
   });
 
+  it('shows the primary transfer candidate issue while the purchase is in review', async () => {
+    const { element } = await render(false, undefined, {
+      status: 'in_review',
+      payment_verification: {
+        status: 'candidate',
+        candidate_count: 2,
+        primary: {
+          reason: 'exact_dni_near_amount',
+          payment_amount: '49000.00',
+          purchase_amount: '50000.00',
+          amount_difference: '1000.00',
+          confidence: 'high',
+          detected_at: '2026-08-27T18:00:00-03:00',
+        },
+        reasons: ['exact_dni_near_amount', 'exact_amount_different_dni'],
+      },
+    } as PurchaseDetailResponse);
+
+    expect(element.textContent).toContain('Encontramos 2 transferencias posibles.');
+    expect(element.textContent).toMatch(/diferencia de \$\s*1\.000/);
+    expect(element.textContent).toContain('Estamos revisando el pago.');
+  });
+
   it('polls every five seconds while the payment is pending and shows the confirmation', async () => {
     vi.useFakeTimers();
 

src/app/features/store/pages/purchase-status-page/purchase-status-page.component.ts

@@ -13,6 +13,7 @@ import { ActivatedRoute, Router } from '@angular/router';
 
 import {
   CheckoutService,
+  PurchasePaymentVerificationResponse,
   PurchaseStatusResponse,
 } from '../../../../core/services/checkout.service';
 import { CartService } from '../../../../core/services/cart/cart.service';
@@ -48,6 +49,7 @@ export class PurchaseStatusPageComponent implements OnInit, OnDestroy {
   protected readonly isLoading = signal(true);
   protected readonly status = signal<PurchaseStatusView>('pending');
   protected readonly hasGeneratedTickets = signal(false);
+  protected readonly paymentIssueMessage = signal<string | null>(null);
   protected readonly ticketsRoute = computed(() => {
     if (!this.hasGeneratedTickets()) {
       return null;
@@ -105,6 +107,7 @@ export class PurchaseStatusPageComponent implements OnInit, OnDestroy {
       const status = this.resolveStatus(purchase);
       this.status.set(status);
       this.hasGeneratedTickets.set(purchase.has_generated_tickets === true);
+      this.paymentIssueMessage.set(this.resolvePaymentIssueMessage(purchase.payment_verification));
 
       if (status === 'approved') {
         this.cartService.clearCart();
@@ -169,6 +172,41 @@ export class PurchaseStatusPageComponent implements OnInit, OnDestroy {
     return 'pending';
   }
 
+  private resolvePaymentIssueMessage(
+    verification?: PurchasePaymentVerificationResponse,
+  ): string | null {
+    const primary = verification?.primary;
+
+    if (!primary) {
+      return null;
+    }
+
+    const primaryMessage = (() => {
+      switch (primary.reason) {
+        case 'ambiguous_exact_match':
+          return 'Encontramos una transferencia que también coincide con otra compra.';
+        case 'exact_dni_near_amount':
+          return `El DNI coincide, pero el monto transferido tiene una diferencia de ${this.formatCurrency(primary.amount_difference)}.`;
+        case 'exact_amount_different_dni':
+          return 'El monto coincide, pero el DNI del pagador es diferente.';
+      }
+    })();
+
+    if (verification.candidate_count > 1) {
+      return `Encontramos ${verification.candidate_count} transferencias posibles. ${primaryMessage}`;
+    }
+
+    return primaryMessage;
+  }
+
+  private formatCurrency(amount: string): string {
+    return new Intl.NumberFormat('es-AR', {
+      style: 'currency',
+      currency: 'ARS',
+      maximumFractionDigits: 2,
+    }).format(Number(amount));
+  }
+
   private isPurchaseExpiredError(error: unknown): boolean {
     if (typeof error !== 'object' || error === null || !('error' in error)) {
       return false;