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Revert "fix(js): use pure JS SHA256 library, refactor (#471)" (#475)

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This reverts commit 7b84904d15.
This commit is contained in:
Xe Iaso 2025-05-08 18:22:08 -04:00 • committed by GitHub
parent 7b84904d15
commit b1c276db9f
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GPG key ID: B5690EEEBB952194
13 changed files with 234 additions and 335 deletions
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69
web/js/worker/fast.mjs
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@ -1,69 +0,0 @@
import { Sha256 } from '@aws-crypto/sha256-js';
const sha256 = (text) => {
const hash = new Sha256();
hash.update(text);
return hash.digest();
};
function uint8ArrayToHexString(arr) {
return Array.from(arr)
.map((c) => c.toString(16).padStart(2, "0"))
.join("");
}
addEventListener('message', async (event) => {
let data = event.data.data;
let difficulty = event.data.difficulty;
let hash;
let nonce = event.data.nonce;
let threads = event.data.threads;
const threadId = nonce;
while (true) {
const currentHash = await sha256(data + nonce);
const thisHash = new Uint8Array(currentHash);
let valid = true;
for (let j = 0; j < difficulty; j++) {
const byteIndex = Math.floor(j / 2); // which byte we are looking at
const nibbleIndex = j % 2; // which nibble in the byte we are looking at (0 is high, 1 is low)
let nibble = (thisHash[byteIndex] >> (nibbleIndex === 0 ? 4 : 0)) & 0x0F; // Get the nibble
if (nibble !== 0) {
valid = false;
break;
}
}
if (valid) {
hash = uint8ArrayToHexString(thisHash);
break;
}
const oldNonce = nonce;
nonce += threads;
// send a progress update every 1024 iterations. since each thread checks
// separate values, one simple way to do this is by bit masking the
// nonce for multiples of 1024. unfortunately, if the number of threads
// is not prime, only some of the threads will be sending the status
// update and they will get behind the others. this is slightly more
// complicated but ensures an even distribution between threads.
if (
nonce > oldNonce | 1023 && // we've wrapped past 1024
(nonce >> 10) % threads === threadId // and it's our turn
) {
postMessage(nonce);
}
}
postMessage({
hash,
data,
difficulty,
nonce,
});
});

35
web/js/worker/slow.mjs
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@ -1,35 +0,0 @@
import { Sha256 } from '@aws-crypto/sha256-js';
const sha256 = (text) => {
const hash = new Sha256();
hash.update(text);
return hash.digest()
.then((result) =>
Array.from(new Uint8Array(result))
.map((c) => c.toString(16).padStart(2, "0"))
.join(""),
);
};
addEventListener('message', async (event) => {
let data = event.data.data;
let difficulty = event.data.difficulty;
let hash;
let nonce = 0;
do {
if ((nonce & 1023) === 0) {
postMessage(nonce);
}
hash = await sha256(data + nonce++);
} while (hash.substring(0, difficulty) !== Array(difficulty + 1).join('0'));
nonce -= 1; // last nonce was post-incremented
postMessage({
hash,
data,
difficulty,
nonce,
});
});