1 files changed, 16 insertions, 0 deletions
diff --git a/powWorker.js b/powWorker.js
new file mode 100644
index 0000000..aba22ff
--- /dev/null
+++ b/powWorker.js
@@ -0,0 +1,16 @@
+// /var/www/mail2usenet/powWorker.js
+self.onmessage = async ({ data }) => {
+  const { prefix, targetZeros, startNonce, step } = data;
+  let nonce = startNonce, checked = 0, zeroStr = '0'.repeat(targetZeros);
+  while (true) {
+    const buf = await crypto.subtle.digest('SHA-1', new TextEncoder().encode(prefix + nonce));
+    const hex = Array.from(new Uint8Array(buf)).map(b=>b.toString(16).padStart(2,'0')).join('');
+    if (hex.startsWith(zeroStr)) {
+      return self.postMessage({ type:'found', nonce });
+    }
+    nonce += step;
+    if (++checked % 1000 === 0) {
+      self.postMessage({ type:'progress', checked });
+    }
+  }
+};