Small Proof-of-Work Proof-of-Concept

powpoc.cjs

// Simple hash-rate checking proof-of-work proof-of-concept script
const exec = (digits) => {
  const crypto = require('crypto');
  while (true) {
    const start = performance.now();
    let i = 0;
    const nextHash = () => crypto.createHash('sha512').update(`${++i}`).digest('hex');
    let hash = '';
    let target = Math.floor(Math.random() * (10 ** digits)).toString(16).padStart(digits, '0');
    while (!hash.startsWith(target)) {
      hash = nextHash()
    }
    console.log('Calculated', hash, 'with', i, 'which starts with target', target, 'in', (performance.now() - start) + 'ms')
  }
}
exec(5); // Using a digit count above 6 is just asking for trouble; 6 already takes up to ~60s on a Ryzen 5 3600x - ideally, you should just use 5 and check multiple results with 5 until you achieve the desired complexity