chore: port client-side JS to TypeScript (#1100)

* chore(challenge/preact): port to typescript Signed-off-by: Xe Iaso <me@xeiaso.net> * chore(js/algorithms): port to typescript Signed-off-by: Xe Iaso <me@xeiaso.net> * chore(js/worker): port to typescript Signed-off-by: Xe Iaso <me@xeiaso.net> * chore(web): fix TypeScript build logic Signed-off-by: Xe Iaso <me@xeiaso.net> * chore(web): port bench.mjs to typescript Signed-off-by: Xe Iaso <me@xeiaso.net> * chore(web): port main.mjs to typescript Signed-off-by: Xe Iaso <me@xeiaso.net> * Update metadata check-spelling run (pull_request) for Xe/use-typescript Signed-off-by: check-spelling-bot <check-spelling-bot@users.noreply.github.com> on-behalf-of: @check-spelling <check-spelling-bot@check-spelling.dev> * fix(js/algorithms/fast): handle old browsers Closes #1082 Signed-off-by: Xe Iaso <me@xeiaso.net> --------- Signed-off-by: Xe Iaso <me@xeiaso.net> Signed-off-by: check-spelling-bot <check-spelling-bot@users.noreply.github.com>
2025-09-11 10:03:10 -04:00 · 2025-09-11 10:03:10 -04:00 · 2011b83a44
commit 2011b83a44
parent 8ed89a6c6e
12 changed files with 190 additions and 130 deletions
--- a/web/js/algorithms/fast.ts
+++ b/web/js/algorithms/fast.ts
@ -0,0 +1,85 @@
+type ProgressCallback = (nonce: number) => void;
+
+interface ProcessOptions {
+  basePrefix: string;
+  version: string;
+}
+
+const getHardwareConcurrency = () =>
+  navigator.hardwareConcurrency !== undefined ? navigator.hardwareConcurrency : 1;
+
+export default function process(
+  options: ProcessOptions,
+  data: string,
+  difficulty: number = 5,
+  signal: AbortSignal | null = null,
+  progressCallback?: ProgressCallback,
+  threads: number = Math.trunc(Math.max(getHardwareConcurrency() / 2, 1)),
+): Promise<string> {
+  console.debug("fast algo");
+
+  let workerMethod = window.crypto !== undefined ? "webcrypto" : "purejs";
+
+  if (navigator.userAgent.includes("Firefox") || navigator.userAgent.includes("Goanna")) {
+    console.log("Firefox detected, using pure-JS fallback");
+    workerMethod = "purejs";
+  }
+
+  return new Promise((resolve, reject) => {
+    let webWorkerURL = `${options.basePrefix}/.within.website/x/cmd/anubis/static/js/worker/sha256-${workerMethod}.mjs?cacheBuster=${options.version}`;
+
+    const workers: Worker[] = [];
+    let settled = false;
+
+    const onAbort = () => {
+      console.log("PoW aborted");
+      cleanup();
+      reject(new DOMException("Aborted", "AbortError"));
+    };
+
+    const cleanup = () => {
+      if (settled) {
+        return;
+      }
+      settled = true;
+      workers.forEach((w) => w.terminate());
+      if (signal != null) {
+        signal.removeEventListener("abort", onAbort);
+      }
+    };
+
+    if (signal != null) {
+      if (signal.aborted) {
+        return onAbort();
+      }
+      signal.addEventListener("abort", onAbort, { once: true });
+    }
+
+    for (let i = 0; i < threads; i++) {
+      let worker = new Worker(webWorkerURL);
+
+      worker.onmessage = (event) => {
+        if (typeof event.data === "number") {
+          progressCallback?.(event.data);
+        } else {
+          cleanup();
+          resolve(event.data);
+        }
+      };
+
+      worker.onerror = (event) => {
+        cleanup();
+        reject(event);
+      };
+
+      worker.postMessage({
+        data,
+        difficulty,
+        nonce: i,
+        threads,
+      });
+
+      workers.push(worker);
+    }
+  });
+}