cover more retryable errors for quote resolution

packages/backend/src/misc/is-retryable-error.ts

@@ -0,0 +1,22 @@
+/*
+ * SPDX-FileCopyrightText: hazelnoot and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { AbortError } from 'node-fetch';
+import { UnrecoverableError } from 'bullmq';
+import { StatusError } from '@/misc/status-error.js';
+import { IdentifiableError } from '@/misc/identifiable-error.js';
+
+/**
+ * Returns false if the provided value represents a "permanent" error that cannot be retried.
+ * Returns true if the error is retryable, unknown (as all errors are retryable by default), or not an error object.
+ */
+export function isRetryableError(e: unknown): boolean {
+	if (e instanceof StatusError) return e.isRetryable;
+	if (e instanceof IdentifiableError) return e.isRetryable;
+	if (e instanceof UnrecoverableError) return false;
+	if (e instanceof AbortError) return true;
+	if (e instanceof Error) return e.name === 'AbortError';
+	return true;
+}