Load limiting safeguards

dashboard/src/contributions.md

@@ -3,22 +3,24 @@ title: Contributions
 ---
 
 ```js
-import {API} from "./components/config.js";
+import {API, apiFetch, pollDelay, sleep} from "./components/config.js";
 const POLL = 30_000;
 ```
 
 ```js
 // Live poll for contributions
 const contribState = (async function*() {
+  let failures = 0;
   while (true) {
     let data = [], ok = false;
     try {
-      const r = await fetch(`${API}/contributions/`);
+      const r = await apiFetch("/contributions/");
       ok = r.ok;
       data = ok ? await r.json() : [];
     } catch {}
+    failures = ok ? 0 : failures + 1;
     yield {data, ok, ts: new Date()};
-    await new Promise(res => setTimeout(res, POLL));
+    await sleep(pollDelay({ok, base: POLL, failures}));
   }
 })();
 ```