feat: sentry

also:
- update privacy policy
- fix space missing in terms of service
- some image viewer style changes

.env.example

@@ -6,6 +6,10 @@ REDIS_URL="redis://localhost:6379/0"
 # Used for metadata, sitemaps, etc.
 NEXT_PUBLIC_BASE_URL=http://localhost:3000
 
+# Used for error tracking
+NEXT_PUBLIC_SENTRY_DSN=""
+SENTRY_URL=""
+
 # Check Auth.js docs for information
 AUTH_URL=http://localhost:3000 # This should be the same as NEXT_PUBLIC_BASE_URL
 AUTH_TRUST_HOST=true

.gitignore

@@ -44,3 +44,5 @@ next-env.d.ts
 
 # tomodachi-share
 uploads/
+# Sentry Config File
+.env.sentry-build-plugin

next.config.ts

@@ -1,3 +1,4 @@
+import { withSentryConfig } from "@sentry/nextjs";
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
@@ -31,4 +32,41 @@ const nextConfig: NextConfig = {
 	},
 };
 
-export default nextConfig;
+export default withSentryConfig(nextConfig, {
+	// For all available options, see:
+	// https://www.npmjs.com/package/@sentry/webpack-plugin#options
+
+	org: "trafficlunar",
+
+	project: "tomodachishare",
+	sentryUrl: process.env.SENTRY_URL,
+
+	// Only print logs for uploading source maps in CI
+	silent: !process.env.CI,
+
+	// For all available options, see:
+	// https://docs.sentry.io/platforms/javascript/guides/nextjs/manual-setup/
+
+	// Upload a larger set of source maps for prettier stack traces (increases build time)
+	widenClientFileUpload: true,
+
+	// Uncomment to route browser requests to Sentry through a Next.js rewrite to circumvent ad-blockers.
+	// This can increase your server load as well as your hosting bill.
+	// Note: Check that the configured route will not match with your Next.js middleware, otherwise reporting of client-
+	// side errors will fail.
+	// tunnelRoute: "/monitoring",
+
+	webpack: {
+		// Enables automatic instrumentation of Vercel Cron Monitors. (Does not yet work with App Router route handlers.)
+		// See the following for more information:
+		// https://docs.sentry.io/product/crons/
+		// https://vercel.com/docs/cron-jobs
+		automaticVercelMonitors: false,
+
+		// Tree-shaking options for reducing bundle size
+		treeshake: {
+			// Automatically tree-shake Sentry logger statements to reduce bundle size
+			removeDebugLogging: true,
+		},
+	},
+});

package.json

@@ -8,8 +8,7 @@
 		"build": "next build",
 		"start": "next start",
 		"lint": "next lint",
-		"postinstall": "prisma generate",
-		"test": "vitest"
+		"postinstall": "prisma generate"
 	},
 	"dependencies": {
 		"@2toad/profanity": "^3.2.0",
@@ -17,6 +16,7 @@
 		"@bprogress/next": "^3.2.12",
 		"@hello-pangea/dnd": "^18.0.1",
 		"@prisma/client": "^6.19.2",
+		"@sentry/nextjs": "^10.39.0",
 		"bit-buffer": "^0.3.0",
 		"canvas-confetti": "^1.9.4",
 		"dayjs": "^1.11.19",
@@ -53,7 +53,6 @@
 		"prisma": "^6.19.2",
 		"schema-dts": "^1.1.5",
 		"tailwindcss": "^4.1.18",
-		"typescript": "^5.9.3",
-		"vitest": "^4.0.18"
+		"typescript": "^5.9.3"
 	}
 }

sentry.server.config.ts

@@ -0,0 +1,16 @@
+// This file configures the initialization of Sentry on the server.
+// The config you add here will be used whenever the server handles a request.
+// https://docs.sentry.io/platforms/javascript/guides/nextjs/
+
+import * as Sentry from "@sentry/nextjs";
+
+Sentry.init({
+	dsn: process.env.NEXT_PUBLIC_SENTRY_DSN,
+	// Define how likely traces are sampled. Adjust this value in production, or use tracesSampler for greater control.
+	tracesSampleRate: 0.1,
+	// Enable logs to be sent to Sentry
+	enableLogs: true,
+	// Enable sending user PII (Personally Identifiable Information)
+	// https://docs.sentry.io/platforms/javascript/guides/nextjs/configuration/options/#sendDefaultPii
+	sendDefaultPii: false,
+});

src/app/api/auth/about-me/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 import { profanity } from "@2toad/profanity";
 import z from "zod";
 
@@ -9,6 +10,7 @@ import { RateLimit } from "@/lib/rate-limit";
 export async function PATCH(request: NextRequest) {
 	const session = await auth();
 	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 3);
 	const check = await rateLimit.handle();
@@ -27,6 +29,7 @@ export async function PATCH(request: NextRequest) {
 		});
 	} catch (error) {
 		console.error("Failed to update description:", error);
+		Sentry.captureException(error, { extra: { stage: "update-about-me" } });
 		return rateLimit.sendResponse({ error: "Failed to update description" }, 500);
 	}
 

src/app/api/auth/delete/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
@@ -7,6 +8,7 @@ import { RateLimit } from "@/lib/rate-limit";
 export async function DELETE(request: NextRequest) {
 	const session = await auth();
 	if (!session || !session.user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 1);
 	const check = await rateLimit.handle();
@@ -18,6 +20,7 @@ export async function DELETE(request: NextRequest) {
 		});
 	} catch (error) {
 		console.error("Failed to delete user:", error);
+		Sentry.captureException(error, { extra: { stage: "delete-account" } });
 		return rateLimit.sendResponse({ error: "Failed to delete account" }, 500);
 	}
 

src/app/api/auth/display-name/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 import { profanity } from "@2toad/profanity";
 
 import { auth } from "@/lib/auth";
@@ -9,6 +10,7 @@ import { RateLimit } from "@/lib/rate-limit";
 export async function PATCH(request: NextRequest) {
 	const session = await auth();
 	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 3);
 	const check = await rateLimit.handle();
@@ -30,6 +32,7 @@ export async function PATCH(request: NextRequest) {
 		});
 	} catch (error) {
 		console.error("Failed to update display name:", error);
+		Sentry.captureException(error, { extra: { stage: "update-display-name" } });
 		return rateLimit.sendResponse({ error: "Failed to update display name" }, 500);
 	}
 

src/app/api/auth/picture/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 import dayjs from "dayjs";
 import { z } from "zod";
 
@@ -20,6 +21,7 @@ const formDataSchema = z.object({
 export async function PATCH(request: NextRequest) {
 	const session = await auth();
 	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 3);
 	const check = await rateLimit.handle();
@@ -68,6 +70,7 @@ export async function PATCH(request: NextRequest) {
 		await fs.writeFile(fileLocation, webpBuffer);
 	} catch (error) {
 		console.error("Error uploading profile picture:", error);
+		Sentry.captureException(error, { extra: { stage: "upload-profile-picture" } });
 		return rateLimit.sendResponse({ error: "Failed to store profile picture" }, 500);
 	}
 
@@ -78,6 +81,7 @@ export async function PATCH(request: NextRequest) {
 		});
 	} catch (error) {
 		console.error("Failed to update profile picture:", error);
+		Sentry.captureException(error, { extra: { stage: "update-profile-picture" } });
 		return rateLimit.sendResponse({ error: "Failed to update profile picture" }, 500);
 	}
 

src/app/api/auth/username/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 
 import dayjs from "dayjs";
 import { profanity } from "@2toad/profanity";
@@ -11,6 +12,7 @@ import { RateLimit } from "@/lib/rate-limit";
 export async function PATCH(request: NextRequest) {
 	const session = await auth();
 	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 3);
 	const check = await rateLimit.handle();
@@ -44,6 +46,7 @@ export async function PATCH(request: NextRequest) {
 		});
 	} catch (error) {
 		console.error("Failed to update username:", error);
+		Sentry.captureException(error, { extra: { stage: "update-username" } });
 		return rateLimit.sendResponse({ error: "Failed to update username" }, 500);
 	}
 

src/app/api/mii/[id]/delete/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 
 import fs from "fs/promises";
 import path from "path";
@@ -13,6 +14,7 @@ const uploadsDirectory = path.join(process.cwd(), "uploads", "mii");
 export async function DELETE(request: NextRequest, { params }: { params: Promise<{ id: string }> }) {
 	const session = await auth();
 	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 30, "/api/mii/delete");
 	const check = await rateLimit.handle();
@@ -42,6 +44,7 @@ export async function DELETE(request: NextRequest, { params }: { params: Promise
 		});
 	} catch (error) {
 		console.error("Failed to delete Mii from database:", error);
+		Sentry.captureException(error, { extra: { stage: "delete-mii" } });
 		return rateLimit.sendResponse({ error: "Failed to delete Mii" }, 500);
 	}
 
@@ -49,6 +52,7 @@ export async function DELETE(request: NextRequest, { params }: { params: Promise
 		await fs.rm(miiUploadsDirectory, { recursive: true, force: true });
 	} catch (error) {
 		console.warn("Failed to delete Mii image files:", error);
+		Sentry.captureException(error, { extra: { stage: "delete-mii-images" } });
 	}
 
 	return rateLimit.sendResponse({ success: true });

src/app/api/mii/[id]/edit/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 import { z } from "zod";
 import { Mii } from "@prisma/client";
 
@@ -28,6 +29,7 @@ const editSchema = z.object({
 export async function PATCH(request: NextRequest, { params }: { params: Promise<{ id: string }> }) {
 	const session = await auth();
 	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 1); // no grouped pathname; edit each mii 1 time a minute
 	const check = await rateLimit.handle();
@@ -128,10 +130,11 @@ export async function PATCH(request: NextRequest, { params }: { params: Promise<
 					const fileLocation = path.join(miiUploadsDirectory, `image${index}.webp`);
 
 					await fs.writeFile(fileLocation, webpBuffer);
-				})
+				}),
 			);
 		} catch (error) {
 			console.error("Error uploading user images:", error);
+			Sentry.captureException(error, { extra: { stage: "edit-custom-images" } });
 			return rateLimit.sendResponse({ error: "Failed to store user images" }, 500);
 		}
 	} else if (description === undefined) {

src/app/api/report/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 import { z } from "zod";
 import { Prisma, ReportReason, ReportType } from "@prisma/client";
 
@@ -18,6 +19,7 @@ const reportSchema = z.object({
 export async function POST(request: NextRequest) {
 	const session = await auth();
 	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 2);
 	const check = await rateLimit.handle();
@@ -83,6 +85,7 @@ export async function POST(request: NextRequest) {
 		});
 	} catch (error) {
 		console.error("Report creation failed", error);
+		Sentry.captureException(error, { extra: { stage: "create-report" } });
 		return rateLimit.sendResponse({ error: "Failed to create report" }, 500);
 	}
 

src/app/api/submit/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import * as Sentry from "@sentry/nextjs";
 import { z } from "zod";
 
 import fs from "fs/promises";
@@ -25,9 +26,7 @@ const submitSchema = z.object({
 	name: nameSchema,
 	tags: tagsSchema,
 	description: z.string().trim().max(256).optional(),
-	qrBytesRaw: z
-		.array(z.number(), { error: "A QR code is required" })
-		.length(372, {
+	qrBytesRaw: z.array(z.number(), { error: "A QR code is required" }).length(372, {
 		error: "QR code size is not a valid Tomodachi Life QR code",
 	}),
 	image1: z.union([z.instanceof(File), z.any()]).optional(),
@@ -37,19 +36,16 @@ const submitSchema = z.object({
 
 export async function POST(request: NextRequest) {
 	const session = await auth();
-	if (!session)
-		return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	if (!session) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+	Sentry.setUser({ id: session.user.id, username: session.user.username });
 
 	const rateLimit = new RateLimit(request, 2);
 	const check = await rateLimit.handle();
 	if (check) return check;
 
-	const response = await fetch(
-		`${process.env.NEXT_PUBLIC_BASE_URL}/api/admin/can-submit`,
-	);
+	const response = await fetch(`${process.env.NEXT_PUBLIC_BASE_URL}/api/admin/can-submit`);
 	const { value } = await response.json();
-	if (!value)
-		return rateLimit.sendResponse({ error: "Submissions are disabled" }, 409);
+	if (!value) return rateLimit.sendResponse({ error: "Submissions are disabled" }, 409);
 
 	// Parse data
 	const formData = await request.formData();
@@ -59,11 +55,11 @@ export async function POST(request: NextRequest) {
 	try {
 		rawTags = JSON.parse(formData.get("tags") as string);
 		rawQrBytesRaw = JSON.parse(formData.get("qrBytesRaw") as string);
-	} catch {
-		return rateLimit.sendResponse(
-			{ error: "Invalid JSON in tags or QR bytes" },
-			400,
-		);
+	} catch (error) {
+		Sentry.captureException(error, {
+			extra: { stage: "submit-json-parse" },
+		});
+		return rateLimit.sendResponse({ error: "Invalid JSON in tags or QR code data" }, 400);
 	}
 
 	const parsed = submitSchema.safeParse({
@@ -76,26 +72,13 @@ export async function POST(request: NextRequest) {
 		image3: formData.get("image3"),
 	});
 
-	if (!parsed.success)
-		return rateLimit.sendResponse(
-			{ error: parsed.error.issues[0].message },
-			400,
-		);
-	const {
-		name: uncensoredName,
-		tags: uncensoredTags,
-		description: uncensoredDescription,
-		qrBytesRaw,
-		image1,
-		image2,
-		image3,
-	} = parsed.data;
+	if (!parsed.success) return rateLimit.sendResponse({ error: parsed.error.issues[0].message }, 400);
+	const { name: uncensoredName, tags: uncensoredTags, description: uncensoredDescription, qrBytesRaw, image1, image2, image3 } = parsed.data;
 
 	// Censor potential inappropriate words
 	const name = profanity.censor(uncensoredName);
 	const tags = uncensoredTags.map((t) => profanity.censor(t));
-	const description =
-		uncensoredDescription && profanity.censor(uncensoredDescription);
+	const description = uncensoredDescription && profanity.censor(uncensoredDescription);
 
 	// Validate image files
 	const images: File[] = [];
@@ -107,10 +90,7 @@ export async function POST(request: NextRequest) {
 		if (imageValidation.valid) {
 			images.push(img);
 		} else {
-			return rateLimit.sendResponse(
-				{ error: imageValidation.error },
-				imageValidation.status ?? 400,
-			);
+			return rateLimit.sendResponse({ error: imageValidation.error }, imageValidation.status ?? 400);
 		}
 	}
 
@@ -121,7 +101,8 @@ export async function POST(request: NextRequest) {
 	try {
 		conversion = convertQrCode(qrBytes);
 	} catch (error) {
-		return rateLimit.sendResponse({ error }, 400);
+		Sentry.captureException(error, { extra: { stage: "qr-conversion" } });
+		return rateLimit.sendResponse({ error: error instanceof Error ? error.message : String(error) }, 400);
 	}
 
 	// Create Mii in database
@@ -141,10 +122,7 @@ export async function POST(request: NextRequest) {
 	});
 
 	// Ensure directories exist
-	const miiUploadsDirectory = path.join(
-		uploadsDirectory,
-		miiRecord.id.toString(),
-	);
+	const miiUploadsDirectory = path.join(uploadsDirectory, miiRecord.id.toString());
 	await fs.mkdir(miiUploadsDirectory, { recursive: true });
 
 	// Download the image of the Mii
@@ -164,17 +142,13 @@ export async function POST(request: NextRequest) {
 		await prisma.mii.delete({ where: { id: miiRecord.id } });
 
 		console.error("Failed to download Mii image:", error);
-		return rateLimit.sendResponse(
-			{ error: "Failed to download Mii image" },
-			500,
-		);
+		Sentry.captureException(error, { extra: { miiId: miiRecord.id, stage: "studio-image-download" } });
+		return rateLimit.sendResponse({ error: "Failed to download Mii image" }, 500);
 	}
 
 	try {
 		// Compress and store
-		const studioWebpBuffer = await sharp(studioBuffer)
-			.webp({ quality: 85 })
-			.toBuffer();
+		const studioWebpBuffer = await sharp(studioBuffer).webp({ quality: 85 }).toBuffer();
 		const studioFileLocation = path.join(miiUploadsDirectory, "mii.webp");
 
 		await fs.writeFile(studioFileLocation, studioWebpBuffer);
@@ -191,9 +165,7 @@ export async function POST(request: NextRequest) {
 		const codeBuffer = Buffer.from(codeBase64, "base64");
 
 		// Compress and store
-		const codeWebpBuffer = await sharp(codeBuffer)
-			.webp({ quality: 85 })
-			.toBuffer();
+		const codeWebpBuffer = await sharp(codeBuffer).webp({ quality: 85 }).toBuffer();
 		const codeFileLocation = path.join(miiUploadsDirectory, "qr-code.webp");
 
 		await fs.writeFile(codeFileLocation, codeWebpBuffer);
@@ -203,10 +175,8 @@ export async function POST(request: NextRequest) {
 		await prisma.mii.delete({ where: { id: miiRecord.id } });
 
 		console.error("Error processing Mii files:", error);
-		return rateLimit.sendResponse(
-			{ error: "Failed to process and store Mii files" },
-			500,
-		);
+		Sentry.captureException(error, { extra: { miiId: miiRecord.id, stage: "file-processing" } });
+		return rateLimit.sendResponse({ error: "Failed to process and store Mii files" }, 500);
 	}
 
 	// Compress and store user images
@@ -215,10 +185,7 @@ export async function POST(request: NextRequest) {
 			images.map(async (image, index) => {
 				const buffer = Buffer.from(await image.arrayBuffer());
 				const webpBuffer = await sharp(buffer).webp({ quality: 85 }).toBuffer();
-				const fileLocation = path.join(
-					miiUploadsDirectory,
-					`image${index}.webp`,
-				);
+				const fileLocation = path.join(miiUploadsDirectory, `image${index}.webp`);
 
 				await fs.writeFile(fileLocation, webpBuffer);
 			}),
@@ -235,10 +202,9 @@ export async function POST(request: NextRequest) {
 		});
 	} catch (error) {
 		console.error("Error storing user images:", error);
-		return rateLimit.sendResponse(
-			{ error: "Failed to store user images" },
-			500,
-		);
+
+		Sentry.captureException(error, { extra: { miiId: miiRecord.id, stage: "user-image-storage" } });
+		return rateLimit.sendResponse({ error: "Failed to store user images" }, 500);
 	}
 
 	return rateLimit.sendResponse({ success: true, id: miiRecord.id });

src/app/global-error.tsx

@@ -0,0 +1,23 @@
+"use client";
+
+import * as Sentry from "@sentry/nextjs";
+import NextError from "next/error";
+import { useEffect } from "react";
+
+export default function GlobalError({ error }: { error: Error & { digest?: string } }) {
+	useEffect(() => {
+		Sentry.captureException(error);
+	}, [error]);
+
+	return (
+		<html lang="en">
+			<body>
+				{/* `NextError` is the default Next.js error page component. Its type
+        definition requires a `statusCode` prop. However, since the App Router
+        does not expose status codes for errors, we simply pass 0 to render a
+        generic error message. */}
+				<NextError statusCode={0} />
+			</body>
+		</html>
+	);
+}

src/app/privacy/page.tsx

@@ -10,7 +10,7 @@ export default function PrivacyPage() {
 		<div className="bg-amber-50 border-2 border-amber-500 rounded-2xl p-6">
 			<h1 className="text-2xl font-bold">Privacy Policy</h1>
 			<h2 className="font-light">
-				<strong className="font-medium">Effective Date:</strong> April 06, 2025
+				<strong className="font-medium">Effective Date:</strong> 21 February 2026
 			</h2>
 
 			<hr className="border-black/20 mt-1 mb-4" />
@@ -32,12 +32,11 @@ export default function PrivacyPage() {
 						<p className="mb-2">The following types of information are stored when you use this website:</p>
 						<ul className="list-disc list-inside">
 							<li>
-								<strong>Account Information:</strong> When you sign up or log in using Discord or Github, your username, e-mail, and profile picture
-								are collected. Your authentication tokens may also be temporarily stored to maintain your login session.
+								<strong>Account Information:</strong> When you sign up or log in using Discord or Github, your username, e-mail, and profile picture are
+								collected. Your authentication tokens may also be temporarily stored to maintain your login session.
 							</li>
 							<li>
-								<strong>Miis:</strong> We store any Miis you submit, including associated images (such as a picture of your Mii, QR codes, and custom
-								images).
+								<strong>Miis:</strong> We store any Miis you submit, including associated images (such as a picture of your Mii, QR codes, and custom images).
 							</li>
 							<li>
 								<strong>Interaction Data:</strong> The Miis you like.
@@ -49,9 +48,7 @@ export default function PrivacyPage() {
 					<h3 className="text-xl font-semibold mt-6 mb-2">Use of Cookies</h3>
 
 					<section>
-						<p className="mb-2">
-							Cookies are necessary for user sessions and authentication. We do not use cookies for tracking or advertising purposes.
-						</p>
+						<p className="mb-2">Cookies are necessary for user sessions and authentication. We do not use cookies for tracking or advertising purposes.</p>
 					</section>
 				</li>
 				<li>
@@ -63,18 +60,35 @@ export default function PrivacyPage() {
 							<a href="https://umami.is/" className="text-blue-700">
 								Umami
 							</a>{" "}
-							to collect anonymous data about how users interact with the site. Umami is fully GDPR-compliant, and no personally identifiable
-							information is collected through this service.
+							to collect anonymous data about how users interact with the site. Umami is fully GDPR-compliant, and no personally identifiable information is
+							collected through this service.
 						</p>
 					</section>
 				</li>
+				<li>
+					<h3 className="text-xl font-semibold mt-6 mb-2">Error Reporting</h3>
+					<section>
+						<p className="mb-2">
+							This website uses{" "}
+							<a href="https://glitchtip.com/" className="text-blue-700">
+								GlitchTip
+							</a>{" "}
+							(a self-hosted Sentry-like instance) to monitor errors and site performance. To protect your privacy:
+						</p>
+						<ul className="list-disc list-inside ml-4">
+							<li>Errors and performance data is collected.</li>
+							<li>Only your user ID and username are sent, no other personally identifiable information is collected.</li>
+							<li>You can use ad blockers or browser privacy features to opt out.</li>
+						</ul>
+					</section>
+				</li>
 				<li>
 					<h3 className="text-xl font-semibold mt-6 mb-2">Data Sharing</h3>
 
 					<section>
 						<p className="mb-2">
-							We do not sell your personal data to third parties. Your data may be sent anonymously to self-hosted third-party services or trusted
-							third-party tools (such as analytics) but these services are used solely to keep the site functional.
+							We do not sell your personal data to third parties. Your data may be sent anonymously to self-hosted third-party services or trusted third-party
+							tools (such as analytics) but these services are used solely to keep the site functional.
 						</p>
 					</section>
 				</li>
@@ -95,9 +109,9 @@ export default function PrivacyPage() {
 
 					<section>
 						<p className="mb-2">
-							Your data, including your Miis, will be retained for as long as you have an account on the site. You may request that your data be
-							deleted at any time by going to your profile page, clicking the settings icon, and clicking the &apos;Delete Account&apos; button. Upon
-							clicking, your data will be promptly removed from our servers.
+							Your data, including your Miis, will be retained for as long as you have an account on the site. You may request that your data be deleted at any
+							time by going to your profile page, clicking the settings icon, and clicking the &apos;Delete Account&apos; button. Upon clicking, your data will
+							be promptly removed from our servers.
 						</p>
 					</section>
 				</li>
@@ -106,8 +120,7 @@ export default function PrivacyPage() {
 
 					<section>
 						<p className="mb-2">
-							This Privacy Policy may be updated from time to time. We encourage you to review this policy periodically to stay informed about your
-							privacy.
+							This Privacy Policy may be updated from time to time. We encourage you to review this policy periodically to stay informed about your privacy.
 						</p>
 					</section>
 				</li>

src/app/terms-of-service/page.tsx

@@ -16,8 +16,8 @@ export default function PrivacyPage() {
 			<hr className="border-black/20 mt-1 mb-4" />
 
 			<p>
-				By registering for, or using this service, you confirm that you understand and agree to the terms below. If you do not agree to these terms,
-				you should not use the service.
+				By registering for, or using this service, you confirm that you understand and agree to the terms below. If you do not agree to these terms, you should
+				not use the service.
 			</p>
 			<p className="mt-1">
 				If you have any questions or concerns, please contact me at:{" "}
@@ -54,8 +54,8 @@ export default function PrivacyPage() {
 
 					<section>
 						<p className="mb-2">
-							We reserve the right to suspend or terminate your access to the site at any time if you violate these Terms of Service or engage in any
-							activities that disrupt the functionality of the site.
+							We reserve the right to suspend or terminate your access to the site at any time if you violate these Terms of Service or engage in any activities
+							that disrupt the functionality of the site.
 						</p>
 						<p>
 							To request deletion of your account and personal data, please refer to the{" "}
@@ -81,12 +81,12 @@ export default function PrivacyPage() {
 
 					<section>
 						<p className="mb-2">
-							This service is provided &quot;as is&quot; and without any warranties. We are not responsible for any user-generated content or the
-							actions of users on the site. You use the site at your own risk.
+							This service is provided &quot;as is&quot; and without any warranties. We are not responsible for any user-generated content or the actions of
+							users on the site. You use the site at your own risk.
 						</p>
 						<p>
-							We do not guarantee continuous or secure access to the service and are not liable for any damages resulting from interruptions, loss of
-							data, or unauthorized access.
+							We do not guarantee continuous or secure access to the service and are not liable for any damages resulting from interruptions, loss of data, or
+							unauthorized access.
 						</p>
 					</section>
 				</li>
@@ -98,7 +98,7 @@ export default function PrivacyPage() {
 							If you believe that content uploaded to this site infringes on your copyright, you may submit a DMCA takedown request by emailing{" "}
 							<a href="mailto:hello@trafficlunar.net" className="text-blue-700">
 								hello@trafficlunar.net
-							</a>
+							</a>{" "}
 							or by reporting the Mii on its page.
 						</p>
 						<p className="mb-2">Please include:</p>
@@ -108,8 +108,8 @@ export default function PrivacyPage() {
 							<li>A link to the allegedly infringing material</li>
 							<li>A statement that you have a good faith belief that the use is not authorized</li>
 							<li>
-								A statement that the information in the notice is accurate and, under penalty of perjury, that you are authorized to act on behalf of
-								the copyright owner
+								A statement that the information in the notice is accurate and, under penalty of perjury, that you are authorized to act on behalf of the
+								copyright owner
 							</li>
 							<li>Your electronic or physical signature</li>
 						</ul>
@@ -120,12 +120,12 @@ export default function PrivacyPage() {
 
 					<section>
 						<p className="mb-2">
-							This site is not affiliated with, endorsed by, or associated with Nintendo in any way. &quot;Mii&quot; and all related character designs
-							are trademarks of Nintendo Co., Ltd.
+							This site is not affiliated with, endorsed by, or associated with Nintendo in any way. &quot;Mii&quot; and all related character designs are
+							trademarks of Nintendo Co., Ltd.
 						</p>
 						<p>
-							All Mii-related content is shared by users under the assumption that it does not violate any third-party rights. If you believe your
-							rights have been infringed, please see the DMCA section above.
+							All Mii-related content is shared by users under the assumption that it does not violate any third-party rights. If you believe your rights have
+							been infringed, please see the DMCA section above.
 						</p>
 					</section>
 				</li>
@@ -134,8 +134,8 @@ export default function PrivacyPage() {
 
 					<section>
 						<p className="mb-2">
-							This Terms of Service may be updated from time to time. We encourage you to review the terms periodically to stay informed about the use
-							of the site. We may notify users via a site banner or other means if changes are made to the Terms of Service.
+							This Terms of Service may be updated from time to time. We encourage you to review the terms periodically to stay informed about the use of the
+							site. We may notify users via a site banner or other means if changes are made to the Terms of Service.
 						</p>
 					</section>
 				</li>

src/components/image-viewer.tsx

@@ -118,7 +118,7 @@ export default function ImageViewer({ src, alt, width, height, className, images
 							<>
 								{/* Carousel counter */}
 								<div
-									className={`flex justify-center gap-2 bg-orange-300/25 text-orange-300 w-15 font-semibold text-sm py-1 rounded-full border border-orange-300 absolute top-4 left-4 transition-opacity duration-300 ${
+									className={`flex justify-center gap-2 bg-orange-300 w-15 font-semibold text-sm py-1 rounded-full border-2 border-orange-400 absolute top-4 left-4 transition-opacity duration-300 ${
 										isVisible ? "opacity-100" : "opacity-0"
 									}`}
 								>
@@ -147,7 +147,7 @@ export default function ImageViewer({ src, alt, width, height, className, images
 
 								{/* Carousel snaps */}
 								<div
-									className={`flex justify-center gap-2 bg-orange-300/25 p-2.5 rounded-full border border-orange-300 absolute left-1/2 -translate-x-1/2 bottom-4 transition-opacity duration-300 ${
+									className={`flex justify-center gap-2 bg-orange-300 p-2.5 rounded-full border-2 border-orange-400 absolute left-1/2 -translate-x-1/2 bottom-4 transition-opacity duration-300 ${
 										isVisible ? "opacity-100" : "opacity-0"
 									}`}
 								>
@@ -156,7 +156,7 @@ export default function ImageViewer({ src, alt, width, height, className, images
 											key={index}
 											aria-label={`Go to ${index} in Carousel`}
 											onClick={() => emblaApi?.scrollTo(index)}
-											className={`size-2 cursor-pointer rounded-full transition-all duration-300 ${index === selectedIndex ? "bg-orange-300 w-8" : "bg-orange-300/40"}`}
+											className={`size-2 cursor-pointer rounded-full transition-all duration-300 ${index === selectedIndex ? "bg-slate-800 w-8" : "bg-slate-800/30"}`}
 										/>
 									))}
 								</div>

src/components/submit-form/index.tsx

@@ -36,9 +36,7 @@ export default function SubmitForm() {
 
 	const [isQrScannerOpen, setIsQrScannerOpen] = useState(false);
 	const [studioUrl, setStudioUrl] = useState<string | undefined>();
-	const [generatedQrCodeUrl, setGeneratedQrCodeUrl] = useState<
-		string | undefined
-	>();
+	const [generatedQrCodeUrl, setGeneratedQrCodeUrl] = useState<string | undefined>();
 
 	const [error, setError] = useState<string | undefined>(undefined);
 
@@ -129,29 +127,16 @@ export default function SubmitForm() {
 		<form className="flex justify-center gap-4 w-full max-lg:flex-col max-lg:items-center">
 			<div className="flex justify-center">
 				<div className="w-75 h-min flex flex-col bg-zinc-50 rounded-3xl border-2 border-zinc-300 shadow-lg p-3">
-					<Carousel
-						images={[
-							studioUrl ?? "/loading.svg",
-							generatedQrCodeUrl ?? "/loading.svg",
-							...files.map((file) => URL.createObjectURL(file)),
-						]}
-					/>
+					<Carousel images={[studioUrl ?? "/loading.svg", generatedQrCodeUrl ?? "/loading.svg", ...files.map((file) => URL.createObjectURL(file))]} />
 
 					<div className="p-4 flex flex-col gap-1 h-full">
 						<h1 className="font-bold text-2xl line-clamp-1" title={name}>
 							{name || "Mii name"}
 						</h1>
 						<div id="tags" className="flex flex-wrap gap-1">
-							{tags.length == 0 && (
-								<span className="px-2 py-1 bg-orange-300 rounded-full text-xs">
-									tag
-								</span>
-							)}
+							{tags.length == 0 && <span className="px-2 py-1 bg-orange-300 rounded-full text-xs">tag</span>}
 							{tags.map((tag) => (
-								<span
-									key={tag}
-									className="px-2 py-1 bg-orange-300 rounded-full text-xs"
-								>
+								<span key={tag} className="px-2 py-1 bg-orange-300 rounded-full text-xs">
 									{tag}
 								</span>
 							))}
@@ -167,9 +152,7 @@ export default function SubmitForm() {
 			<div className="bg-amber-50 border-2 border-amber-500 rounded-2xl shadow-lg p-4 flex flex-col gap-2 max-w-2xl w-full">
 				<div>
 					<h2 className="text-2xl font-bold">Submit your Mii</h2>
-					<p className="text-sm text-zinc-500">
-						Share your creation for others to see.
-					</p>
+					<p className="text-sm text-zinc-500">Share your creation for others to see.</p>
 				</div>
 
 				{/* Separator */}
@@ -227,26 +210,15 @@ export default function SubmitForm() {
 					<QrUpload setQrBytesRaw={setQrBytesRaw} />
 					<span>or</span>
 
-					<button
-						type="button"
-						aria-label="Use your camera"
-						onClick={() => setIsQrScannerOpen(true)}
-						className="pill button gap-2"
-					>
+					<button type="button" aria-label="Use your camera" onClick={() => setIsQrScannerOpen(true)} className="pill button gap-2">
 						<Icon icon="mdi:camera" fontSize={20} />
 						Use your camera
 					</button>
 
-					<QrScanner
-						isOpen={isQrScannerOpen}
-						setIsOpen={setIsQrScannerOpen}
-						setQrBytesRaw={setQrBytesRaw}
-					/>
+					<QrScanner isOpen={isQrScannerOpen} setIsOpen={setIsQrScannerOpen} setQrBytesRaw={setQrBytesRaw} />
 					<SubmitTutorialButton />
 
-					<span className="text-xs text-zinc-400">
-						For emulators, aes_keys.txt is required.
-					</span>
+					<span className="text-xs text-zinc-400">For emulators, aes_keys.txt is required.</span>
 				</div>
 
 				{/* Separator */}
@@ -265,18 +237,14 @@ export default function SubmitForm() {
 						</p>
 					</Dropzone>
 
-					<span className="text-xs text-zinc-400 mt-2">
-						Animated images currently not supported.
-					</span>
+					<span className="text-xs text-zinc-400 mt-2">Animated images currently not supported.</span>
 				</div>
 
 				<ImageList files={files} setFiles={setFiles} />
 
 				<hr className="border-zinc-300 my-2" />
 				<div className="flex justify-between items-center">
-					{error && (
-						<span className="text-red-400 font-bold">Error: {error}</span>
-					)}
+					{error && <span className="text-red-400 font-bold">Error: {error}</span>}
 
 					<SubmitButton onClick={handleSubmit} className="ml-auto" />
 				</div>

src/instrumentation-client.ts

@@ -0,0 +1,18 @@
+// This file configures the initialization of Sentry on the client.
+// The added config here will be used whenever a users loads a page in their browser.
+// https://docs.sentry.io/platforms/javascript/guides/nextjs/
+
+import * as Sentry from "@sentry/nextjs";
+
+Sentry.init({
+	dsn: process.env.NEXT_PUBLIC_SENTRY_DSN,
+	// Define how likely traces are sampled. Adjust this value in production, or use tracesSampler for greater control.
+	tracesSampleRate: 0.1,
+	// Enable logs to be sent to Sentry
+	enableLogs: true,
+	// Enable sending user PII (Personally Identifiable Information)
+	// https://docs.sentry.io/platforms/javascript/guides/nextjs/configuration/options/#sendDefaultPii
+	sendDefaultPii: false,
+});
+
+export const onRouterTransitionStart = Sentry.captureRouterTransitionStart;

src/instrumentation.ts

@@ -0,0 +1,9 @@
+import * as Sentry from "@sentry/nextjs";
+
+export async function register() {
+	if (process.env.NEXT_RUNTIME === "nodejs") {
+		await import("../sentry.server.config");
+	}
+}
+
+export const onRequestError = Sentry.captureRequestError;

src/lib/images.tsx

@@ -4,6 +4,7 @@
 /* eslint-disable @next/next/no-img-element */
 
 import type { ReactNode } from "react";
+import * as Sentry from "@sentry/nextjs";
 
 import fs from "fs/promises";
 import path from "path";
@@ -62,6 +63,7 @@ export async function validateImage(file: File): Promise<{ valid: boolean; error
 
 			if (!moderationResponse.ok) {
 				console.error("Moderation API error");
+				Sentry.captureException("Moderation API error", { extra: { stage: "moderation-api-response", status: moderationResponse.status } });
 				return { valid: false, error: "Content moderation check failed", status: 500 };
 			}
 
@@ -71,13 +73,15 @@ export async function validateImage(file: File): Promise<{ valid: boolean; error
 			}
 		} catch (moderationError) {
 			console.error("Error fetching moderation API:", moderationError);
+			Sentry.captureException(moderationError, { extra: { stage: "moderation-api-fetch" } });
 			return { valid: false, error: "Moderation API is down", status: 503 };
 		}
 
 		return { valid: true };
 	} catch (error) {
 		console.error("Error validating image:", error);
-		return { valid: false, error: "Failed to process image file.", status: 500 };
+		Sentry.captureException(error, { extra: { stage: "image-validation" } });
+		return { valid: false, error: "Failed to process image file", status: 500 };
 	}
 }
 //#endregion
@@ -117,7 +121,7 @@ const loadFonts = async (): Promise<Font[]> => {
 				};
 			}
 			return fontCache[weight]!;
-		})
+		}),
 	);
 };
 
@@ -131,13 +135,13 @@ export async function generateMetadataImage(mii: Mii, author: string): Promise<{
 			sharp(buffer)
 				.png()
 				.toBuffer()
-				.then((pngBuffer) => `data:image/png;base64,${pngBuffer.toString("base64")}`)
+				.then((pngBuffer) => `data:image/png;base64,${pngBuffer.toString("base64")}`),
 		),
 		fs.readFile(path.join(miiUploadsDirectory, "qr-code.webp")).then((buffer) =>
 			sharp(buffer)
 				.png()
 				.toBuffer()
-				.then((pngBuffer) => `data:image/png;base64,${pngBuffer.toString("base64")}`)
+				.then((pngBuffer) => `data:image/png;base64,${pngBuffer.toString("base64")}`),
 		),
 		loadFonts(),
 	]);
@@ -211,6 +215,7 @@ export async function generateMetadataImage(mii: Mii, author: string): Promise<{
 		await fs.writeFile(fileLocation, buffer);
 	} catch (error) {
 		console.error("Error storing 'metadata' image type", error);
+		Sentry.captureException(error, { extra: { stage: "metadata-image-storage", miiId: mii.id } });
 		return { error: `Failed to store metadata image for ${mii.id}`, status: 500 };
 	}
 

src/lib/qr-codes.test.ts

@@ -1,126 +0,0 @@
-import { convertQrCode } from "./qr-codes";
-import { describe, it, expect } from "vitest";
-import Mii from "./mii.js/mii";
-import { TomodachiLifeMii, HairDyeMode } from "./tomodachi-life-mii";
-
-// List of encrypted QR code data to test against.
-const validQrCodes = [
-	// Frieren (from step6.webp)
-	{
-		base64: "lymEx6TA4eLgfwTEceW+DbdYBTfBfPKM4VesJkq1qzoGGXnk/3OohvPPuGS8mmnzvpvyC36ge8+C2c4IIhJ0l7Lx9KKxnPEAuLBM1YtCnSowjVNHo3CmjE7D7lkDUBuhO3qKjAqWXfQthtqBqjTe4Hv95TKNVPimaxNXhAVZGSmOMh++0Z2N0TvIDpU/8kxLIsgntsQH4PNlaFcVF2HeOERXRdTm/TMFb6pozO57nJ9NKi5bxh1ClNArbpyTQgBe7cfvnNretFVNWzGJBWctZC7weecYIKyU3qbH5c4kogmj4WcfJhYsuOT3odvv2WBaGhchgR779Ztc0E76COxNEaJa6M7QDyHGw8XQfxCH3j4pMkhFOlPn/ObS3rNUADYUCY8d+Wt4fBbO7PTW7ppDnDaCyxwEIbglsMtkD/cIPIr4f0RPnpV7ZlOmrJ3HdIbmwXi6TqKTwqkHtBmBPvZVpXm4RJN8A6gF22Uc7NY8B3KMYY7Q",
-		expected: {
-			miiName: "Frieren",
-			firstName: "Frieren",
-			lastName: "the Slayer",
-			islandName: "Wuhu",
-		},
-	},
-	{
-		base64: "ky1cf9hr9xotl250Y8cDOGqPd7t51NS8tNVrJMRAI2bfXr4LNirKvqu7ZrvC00vgz70NU8kQRR6H3uAnRaHupxjLbeYfU0s6CduruAEnXP8rZanCeSePQQH0NSL3QqiilT2WEt7nCAMvHwR9fT/LE/k6NBMDHqoK3zqzemr4OlQro0YWBeRJ501EawWan/k/rq2VSGTeLO09CsQD6AFHECtxF9+sSKyJxK1aiu7VhmOZLY6L9VKrlpvahQ1/vHVyYVpFJvc3bdHE8D94bBXkZ18mnXj++ST+j1Had4aki7oqTT83fgs7asRg3DRRZArw8PiKVmZWJ4ODRWR/LNvjIxb1FQqWk9I6S3DEo6AMuBRbXgj1H4YWrRuTkWlEpP2Y/P5+Mvfv5GbNQKYSKwpTYFOCTn13yQ1wtDbF4yG+Ro4Xf45cNBT6k3yqswrKt9bkP2wiULqYZR7McaD1SJ4whFFqcadjpLvbn8zQNFY0lOUTQMGI",
-		expected: {
-			miiName: "ミク",
-			firstName: "ミク",
-			lastName: "はつね",
-			islandName: "LOSTの",
-		},
-	},
-];
-
-// 372 bytes of zeroes.
-const zeroes372 = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
-
-// 32 bytes of zeroes (too short to be a Mii QR code).
-const length32 = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
-
-// Mii QR code encrypted correctly but has an invalid CRC-16 checksum.
-const badCrc = "ULENrXILeXZooDaJvwHMcFaBjGH7k5pj+DDPDV0irq66c01Fh82TIrZerZX2xiB+TbHBzYIaDHdryA9IbR1uH/slSalGCScmjDiL9zpOXlvh8z38NGkmjtL1fVVrshCcJHKeQApdbZU4S6h+wZd0LA==";
-
-// Hair dye should be applied to hair only.
-const hairDyeHairOnly = "lHDnfRgqe2+drU303Slkj7+o4JldrKcIdOl5zgLM0LpwQKQY+i3cpt5IIg7LBNAr7TCzHOvi698oUV0QkcyNj71MgtAAaw4MvOdT4dsv0PLof6E7IcjgnCA1ZAJ2Bs5PQTnM/yuVBUIXdq6WYh+nmG3HtxV7zKbEpSy4bqVep8uuvUlfZcB+BQgucPXQLmDnS8ECKwOlANcKTI+ZjIZggVaEsyY88pjRWyXnwe1z4Favw16bIzecesehGlqXzZh9U5Vm5dZP8wmKc3G6TGylYmbnloRd99UYRNULvTQCUer8WljGuV30ftXlJOwfsnwoAiVOGoG3KvbsBpPtPLywR5DavRgQIPd0/b+XUzHQDhkyftMXeqVEalsuEmU/b/1/j4yVL+2lWgD1i2xyET65uJawAnd8jbKbG8lxPMgzIKGVqJB4QmJOl9/dTf21r9GgRFRaFEz+66bVfiYhzXKmJUQv2qx/t/V3r96QzYd08nrWSHK0";
-const hairDyeHairOnlyExpectedCommonColor = 99; // Must apply to hair but not eyebrow and beard.
-// Hair dye should be applied to hair, eyebrow, and beard.
-const hairDyeHairEyebrowBeard = validQrCodes[1].base64; // Miku has hair dye.
-const hairDyeHairEyebrowBeardExpectedCommonColor = 67; // Must apply to hair, eyebrow, and beard.
-
-// Should not have hair dye enabled.
-const hairDyeMode0 = validQrCodes[0].base64; // Frieren doesn't have hair dye
-
-function base64ToUint8Array(base64: string): Uint8Array {
-	const binary = Buffer.from(base64, "base64");
-	return new Uint8Array(binary.buffer, binary.byteOffset, binary.byteLength);
-}
-
-describe("convertQrCode", () => {
-	it.each(validQrCodes.map((t, i) => [i, t]))(
-		"should convert valid QR #%i into Mii + TomodachiLifeMii",
-		(_, { base64, expected }) => {
-			const bytes = base64ToUint8Array(base64);
-			const { mii, tomodachiLifeMii } = convertQrCode(bytes);
-
-			expect(mii).toBeInstanceOf(Mii);
-			expect(tomodachiLifeMii).toBeInstanceOf(TomodachiLifeMii);
-
-			expect(mii.miiName).toBe(expected.miiName);
-			expect(tomodachiLifeMii.firstName).toBe(expected.firstName);
-			expect(tomodachiLifeMii.lastName).toBe(expected.lastName);
-			expect(tomodachiLifeMii.islandName).toBe(expected.islandName);
-		});
-
-	it("should throw an error on zeroed out data", () => {
-		const bytes = base64ToUint8Array(zeroes372);
-		// Will decrypt wrongly, leading to the expected stream
-		// of zeroes in the decrypted data not being intact.
-		expect(() => convertQrCode(bytes)).toThrow("QR code is not a valid Mii QR code");
-	});
-
-	it("should throw an error on wrong length", () => {
-		const bytes = base64ToUint8Array(length32);
-		// Thrown at the beginning of the function.
-		expect(() => convertQrCode(bytes)).toThrow("Mii QR code has wrong size (got 32, expected 112 or longer)");
-	});
-
-	it("should throw an error on data with bad CRC-16", () => {
-		const bytes = base64ToUint8Array(badCrc);
-		// Verified by new Mii() constructor from mii-js.
-		expect(() => convertQrCode(bytes)).toThrow("Mii data is not valid");
-	});
-
-	it("should apply hair dye to hair, eyebrow, and beard", () => {
-		const bytes = base64ToUint8Array(hairDyeHairEyebrowBeard);
-		const { mii, tomodachiLifeMii } = convertQrCode(bytes);
-
-		expect(tomodachiLifeMii.hairDyeMode).toBe(HairDyeMode.HairEyebrowBeard);
-		expect(tomodachiLifeMii.studioHairColor).toBe(hairDyeHairEyebrowBeardExpectedCommonColor);
-		expect(mii.hairColor).toBe(hairDyeHairEyebrowBeardExpectedCommonColor);
-		expect(mii.eyebrowColor).toBe(hairDyeHairEyebrowBeardExpectedCommonColor);
-		expect(mii.facialHairColor).toBe(hairDyeHairEyebrowBeardExpectedCommonColor);
-	});
-
-	it("should apply hair dye to hair only", () => {
-		const bytes = base64ToUint8Array(hairDyeHairOnly);
-		const { mii, tomodachiLifeMii } = convertQrCode(bytes);
-
-		expect(tomodachiLifeMii.hairDyeMode).toBe(HairDyeMode.Hair);
-		expect(tomodachiLifeMii.studioHairColor).toBe(hairDyeHairOnlyExpectedCommonColor);
-		expect(mii.hairColor).toBe(hairDyeHairOnlyExpectedCommonColor);
-		expect(mii.eyebrowColor === hairDyeHairOnlyExpectedCommonColor).toBe(false);
-		expect(mii.facialHairColor === hairDyeHairOnlyExpectedCommonColor).toBe(false);
-	});
-
-	it("should not apply hair dye if mode is 0", () => {
-		const bytes = base64ToUint8Array(hairDyeMode0);
-		const { mii, tomodachiLifeMii } = convertQrCode(bytes);
-
-		expect(tomodachiLifeMii.hairDyeMode).toBe(HairDyeMode.None);
-		expect(mii.hairColor === tomodachiLifeMii.studioHairColor).toBe(false);
-		expect(mii.hairColor === mii.facialHairColor).toBe(false);
-	});
-
-	/*
-	it('should censor bad words in names', () => {
-		const qrWithSwears = // TODO TODO
-		const { tomodachiLifeMii } = convertQrCode(qrWithSwears);
-		expect(tomodachiLifeMii.firstName).not.toMatch(/INSERT_SWEARS_HERE/i);
-	});
-  */
-});

src/lib/qr-codes.ts

@@ -17,14 +17,13 @@ import { TomodachiLifeMii, HairDyeMode } from "./tomodachi-life-mii";
 // In "sjcl-with-all" v1.0.8 from npm, the name is "u"
 
 /** Private _ctrMode function defined here: {@link https://github.com/bitwiseshiftleft/sjcl/blob/85caa53c281eeeb502310013312c775d35fe0867/core/ccm.js#L194} */
-const sjclCcmCtrMode: ((
-	prf: sjcl.SjclCipher, data: sjcl.BitArray, iv: sjcl.BitArray,
-	tag: sjcl.BitArray, tlen: number, L: number
-) => { data: sjcl.BitArray; tag: sjcl.BitArray }) | undefined =
+const sjclCcmCtrMode:
+	| ((prf: sjcl.SjclCipher, data: sjcl.BitArray, iv: sjcl.BitArray, tag: sjcl.BitArray, tlen: number, L: number) => { data: sjcl.BitArray; tag: sjcl.BitArray })
+	| undefined =
 	// @ts-expect-error -- Referencing a private function that is not in the types.
 	sjcl.mode.ccm.u; // NOTE: This may need to be changed with a different sjcl build. Read above
 
-export function convertQrCode(bytes: Uint8Array): { mii: Mii; tomodachiLifeMii: TomodachiLifeMii } {
+export function convertQrCode(bytes: Uint8Array): { mii: Mii; tomodachiLifeMii: TomodachiLifeMii } | never {
 	// Decrypt 96 byte 3DS/Wii U format Mii data from the QR code.
 	// References (Credits: jaames, kazuki-4ys):
 	// - https://gist.github.com/jaames/96ce8daa11b61b758b6b0227b55f9f78
@@ -32,7 +31,9 @@ export function convertQrCode(bytes: Uint8Array): { mii: Mii; tomodachiLifeMii:
 
 	// Check that the private _ctrMode function is defined.
 	if (!sjclCcmCtrMode) {
-		throw new Error("Private sjcl.mode.ccm._ctrMode function cannot be found. The build of sjcl expected may have changed. Read src/lib/qr-codes.ts for more details.");
+		throw new Error(
+			"Private sjcl.mode.ccm._ctrMode function cannot be found. The build of sjcl expected may have changed. Read src/lib/qr-codes.ts for more details.",
+		);
 	}
 
 	// Verify that the length is not smaller than expected.
@@ -52,9 +53,11 @@ export function convertQrCode(bytes: Uint8Array): { mii: Mii; tomodachiLifeMii:
 	// Isolate the actual ciphertext from the tag and adjust IV.
 	// Copied from sjcl.mode.ccm.decrypt: https://github.com/bitwiseshiftleft/sjcl/blob/85caa53c281eeeb502310013312c775d35fe0867/core/ccm.js#L83
 	const tlen = 128; // Tag length in bits.
-	const dataWithoutTag = sjcl.bitArray.clamp(encryptedBits,
+	const dataWithoutTag = sjcl.bitArray.clamp(
+		encryptedBits,
 		// remove tag from out, tag length = 128
-		sjcl.bitArray.bitLength(encryptedBits) - tlen);
+		sjcl.bitArray.bitLength(encryptedBits) - tlen,
+	);
 
 	let decryptedBits: { data: sjcl.BitArray };
 	try {

src/lib/rate-limit.ts

@@ -1,5 +1,6 @@
 import { NextRequest, NextResponse } from "next/server";
 import { createClient, RedisClientType } from "redis";
+import * as Sentry from "@sentry/nextjs";
 import { auth } from "./auth";
 
 const WINDOW_SIZE = 60;
@@ -17,7 +18,10 @@ async function getRedisClient() {
 		client = createClient({
 			url: process.env.REDIS_URL,
 		});
-		client.on("error", (err) => console.error("Redis client error", err));
+		client.on("error", (error) => {
+			console.error("Redis client error", error);
+			Sentry.captureException(error, { tags: { source: "redis-client" } });
+		});
 		await client.connect();
 	}
 	return client;
@@ -67,6 +71,7 @@ export class RateLimit {
 			return { success, limit: this.maxRequests, remaining, expires: expireAt };
 		} catch (error) {
 			console.error("Rate limit check failed", error);
+			Sentry.captureException(error, { tags: { source: "rate-limit-check" } });
 			return {
 				success: false,
 				limit: this.maxRequests,