Catch API endpoint errors.

app/Api/V1/Controllers/Models/CurrencyExchangeRate/DestroyController.php

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+<?php
+
+/*
+ * DestroyController.php
+ * Copyright (c) 2025 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\CurrencyExchangeRate;
+
+use FireflyIII\Api\V2\Controllers\Controller;
+use FireflyIII\Api\V2\Request\Model\ExchangeRate\DestroyRequest;
+use FireflyIII\Models\TransactionCurrency;
+use FireflyIII\Repositories\UserGroups\ExchangeRate\ExchangeRateRepositoryInterface;
+use FireflyIII\Support\Http\Api\ValidatesUserGroupTrait;
+use Illuminate\Http\JsonResponse;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+class DestroyController extends Controller
+{
+    use ValidatesUserGroupTrait;
+
+    public const string RESOURCE_KEY = 'exchange-rates';
+
+    private ExchangeRateRepositoryInterface $repository;
+
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(ExchangeRateRepositoryInterface::class);
+                $this->repository->setUserGroup($this->validateUserGroup($request));
+
+                return $next($request);
+            }
+        );
+    }
+
+    public function destroy(DestroyRequest $request, TransactionCurrency $from, TransactionCurrency $to): JsonResponse
+    {
+        $date = $request->getDate();
+        $rate = $this->repository->getSpecificRateOnDate($from, $to, $date);
+        if (null === $rate) {
+            throw new NotFoundHttpException();
+        }
+        $this->repository->deleteRate($rate);
+
+        return response()->json([], 204);
+    }
+}