close #4

haproxy/js/worker.js

@@ -0,0 +1,27 @@
+async function hash(data, method) {
+	const buffer = new TextEncoder('utf-8').encode(data);
+	const hashBuffer = await crypto.subtle.digest(method, buffer)
+	return Array.from(new Uint8Array(hashBuffer));
+}
+
+onmessage = async function(e) {
+	const [challenge, difficulty, id, threads] = e.data;
+	console.log('Worker thread', id,'got challenge', challenge, 'with difficulty', difficulty);
+	let i = id;
+	let challengeIndex = parseInt(challenge[0], 16);
+	while(true) {
+		let result = await hash(challenge+i, 'sha-1');
+		let middle = true;
+		for(let imiddle = 1; imiddle <= difficulty; imiddle++) {
+			middle = (middle && (result[challengeIndex+imiddle] === 0x00));
+		}
+		if(result[challengeIndex] === 0xb0
+			&& middle === true
+			&& result[challengeIndex+difficulty+1] === 0x0b){
+			console.log('Worker thread found solution:', i);
+			postMessage([id, i]);
+			break;
+		}
+		i+=threads;
+	}
+}