Version 1.3.0

- Implemented authentication and billing routes for Jpn region.
- Refactored and changed the project structure from CommonJS to ES Modules

src/lib/closeConnection.js

@@ -0,0 +1,7 @@
+// This middleware sets the "Connection" header to "close" for all responses.
+// It ensures that the connection is closed after the response is sent, which can help with resource management and performance.
+// The 'next()' function is called to pass control to the next middleware or route handler in the stack.
+export const closeConnection = (req, res, next) => {
+  res.set("Connection", "close");
+  next();
+};

src/lib/rateLimiter.js

@@ -0,0 +1,43 @@
+import rateLimitConfig from "../config/rateLimitConfig.js";
+import { getClientIp } from "../utils/getClientIp.js";
+
+async function rateLimiter(req, res, next) {
+  try {
+    const path = (req.baseUrl + req.path).replace(/\/+$/, "");
+    const limiterKey = Array.from(rateLimitConfig.limiters.keys()).find((key) =>
+      path.startsWith(key)
+    );
+
+    if (!limiterKey) {
+      console.warn(`[RateLimiter] No limiter found for path: "${path}"`);
+      return next();
+    }
+
+    const limiter = rateLimitConfig.getLimiter(limiterKey);
+
+    const clientIP = getClientIp(req);
+    const rateLimitRes = await limiter.consume(clientIP);
+
+    res.set({
+      "Retry-After": rateLimitRes.msBeforeNext / 1000,
+      "X-RateLimit-Limit": limiter.points,
+      "X-RateLimit-Remaining": rateLimitRes.remainingPoints,
+      "X-RateLimit-Reset": new Date(Date.now() + rateLimitRes.msBeforeNext),
+    });
+
+    next();
+  } catch (rateLimitRes) {
+    res.set({
+      "Retry-After": rateLimitRes.msBeforeNext / 1000,
+    });
+
+    return res.status(429).json({
+      error: "Too many requests",
+      message: `You've exceeded the rate limit. Please try again in ${Math.ceil(
+        rateLimitRes.msBeforeNext / 1000
+      )} seconds.`,
+    });
+  }
+}
+
+export default rateLimiter;