const crypto = require('crypto')
a = crypto.createECDH('secp521r1')
a.setPrivateKey(crypto.createHash('sha256').update('alice', 'utf8').digest())
a.getPrivateKey()
// Node.js / Electron v11 => <Buffer 2b d8 06 c9 7f 0e 00 af 1a 1f c3 32 8f a7 63 a9 26 97 23 c8 db 8f ac 4f 93 af 71 db 18 6d 6e 90>
// Electron v12.0.0-nightly.20201014+ => Uncaught Error: Failed to get ECDH private key