feat: add RPC proxy for sending requests to Nimiq RPC node

Author: onmax

server/api/[version]/rpc-proxy.post.ts

@@ -0,0 +1,33 @@
+/**
+ * RPC proxy for sending requests to a specified URL.
+ * This is useful for sending requests to a Nimiq RPC node from the new
+ * Developer Center without the need for CORS.
+ */
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody(event)
+
+  if (!body.payload)
+    throw createError({ statusCode: 400, message: 'Missing payload in request body' })
+  if (!body.url)
+    throw createError({ statusCode: 400, message: 'Missing url in request body' })
+
+  try {
+    const response = await fetch(body.url, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body.payload),
+    })
+
+    const data = await response.json()
+    return data
+  }
+  catch (error) {
+    console.error('RPC proxy error:', error)
+    throw createError({
+      statusCode: 502,
+      message: 'Failed to connect to RPC node',
+      cause: error,
+    })
+  }
+})