Slay The Spire save edit

SlayTheSpire-json-to-save.js

const fs = require('fs');

let data = fs.readFileSync('IRONCLAD.autosave.json', 'utf8');
const out = [];

for (let i = 0; i < data.length; i++) {
    const key = 'key';
    out.push(data.charCodeAt(i) ^ key.charCodeAt(i % key.length));
}

fs.writeFileSync('IRONCLAD.autosave', Buffer.from(out).toString('base64'));

SlayTheSpire-save-to-json.js

const fs = require('fs');

let data = fs.readFileSync('IRONCLAD.autosave', 'utf8');
data = Buffer.from(data, 'base64');
const out = [];

for (let i = 0; i < data.length; i++) {
    const key = 'key';
    out.push(String.fromCharCode(data[i] ^ key.charCodeAt(i % key.length)));
}

fs.writeFileSync('IRONCLAD.autosave.json', out.join(''));