You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
import {getEventHash} from 'nostr-tools';
|
|
import {zeroLeadingBitsCount} from './cryptoutils.js';
|
|
|
|
function mine(event, difficulty, timeout = 5) {
|
|
const max = 256; // arbitrary
|
|
if (!Number.isInteger(difficulty) || difficulty < 0 || difficulty > max) {
|
|
throw new Error(`difficulty must be an integer between 0 and ${max}`);
|
|
}
|
|
// continue with mining
|
|
let n = BigInt(0);
|
|
event.tags.unshift(['nonce', n.toString(), `${difficulty}`]);
|
|
|
|
const start = Math.floor(Date.now() * 0.001);
|
|
console.time('pow');
|
|
while (true) {
|
|
const now = Math.floor(Date.now() * 0.001);
|
|
// if (now > start + 15) {
|
|
// console.timeEnd('pow');
|
|
// return false;
|
|
// }
|
|
if (now !== event.created_at) {
|
|
event.created_at = now;
|
|
// n = BigInt(0); // could reset nonce as we have a new timestamp
|
|
}
|
|
event.tags[0][1] = (++n).toString();
|
|
const id = getEventHash(event);
|
|
if (zeroLeadingBitsCount(id) === difficulty) {
|
|
console.log(event.tags[0][1], id);
|
|
console.timeEnd('pow');
|
|
return event;
|
|
}
|
|
}
|
|
}
|
|
|
|
addEventListener('message', async (msg) => {
|
|
const {
|
|
difficulty,
|
|
event,
|
|
timeout,
|
|
} = msg.data;
|
|
try {
|
|
const minedEvent = mine(event, difficulty, timeout);
|
|
postMessage({event: minedEvent});
|
|
} catch (err) {
|
|
postMessage({error: err});
|
|
}
|
|
}); |