in react native expo rewrite this code from js: const crypto = require('crypto'); const getHash256 = (a) => { return crypto.createHash('sha256').update(a).digest('hex'); } const getHmac512 = (str, key) => { let hmac = crypto.createHmac("sha512", key); return hmac.update(Buffer.from(str, 'utf8')).digest("hex"); }

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A: Dear learner, hope you are doing well, I will try my best to answer this question. Thank You!!

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