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self.onmessage = async ({ data }) => {
const { prefix, targetZeros, startNonce, step } = data;
const zeroStr = '0'.repeat(targetZeros);
let nonce = startNonce;
let checked = 0;
// Batch size: controllare più nonce per ogni aggiornamento di progresso
const BATCH_SIZE = 500;
// Parallelizzazione del lavoro utilizzando più promise contemporaneamente
const CONCURRENT_PROMISES = 12;
// Funzione per verificare un singolo nonce
const checkNonce = async (nonceToCheck) => {
const buf = await crypto.subtle.digest('SHA-1', new TextEncoder().encode(prefix + nonceToCheck));
const hex = Array.from(new Uint8Array(buf)).map(b => b.toString(16).padStart(2, '0')).join('');
return { nonce: nonceToCheck, hex };
};
// Funzione per verificare un batch di nonce in parallelo
const processBatch = async () => {
const promises = [];
for (let i = 0; i < CONCURRENT_PROMISES; i++) {
let batchPromises = [];
for (let j = 0; j < BATCH_SIZE; j++) {
const currentNonce = nonce;
batchPromises.push(checkNonce(currentNonce));
nonce += step;
}
promises.push(Promise.all(batchPromises));
}
// Attende il completamento di tutti i batch
const results = await Promise.all(promises);
// Appiattisce i risultati e controlla se c'è una corrispondenza
const allResults = results.flat();
for (const result of allResults) {
if (result.hex.startsWith(zeroStr)) {
return { found: true, nonce: result.nonce };
}
}
checked += CONCURRENT_PROMISES * BATCH_SIZE;
self.postMessage({ type: 'progress', checked });
return { found: false };
};
// Loop principale
while (true) {
const { found, nonce: foundNonce } = await processBatch();
if (found) {
self.postMessage({ type: 'found', nonce: foundNonce });
break;
}
}
};
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