secp256k1 encrypt/decrypt with bip32 keys

index.js

var KeyEncoder = require('key-encoder')
var VirgilCrypto = require('virgil-crypto').VirgilCrypto
var HDKey = require('hdkey')
const secp256k1 = require('secp256k1')

var keyEncoder = new KeyEncoder('secp256k1')

var hdKey = HDKey.fromMasterSeed(Buffer.from(SEED, 'hex'))
var childKey = hdKey.derive(PATH)

var childPrivateKey = childKey.privateKey.toString('hex')
var childPublicKey = secp256k1.publicKeyConvert(childKey.publicKey, false).toString('hex')

var pemPublicKey = keyEncoder.encodePublic(childPublicKey, 'raw', 'pem')
var pemPrivateKey = keyEncoder.encodePrivate(childPrivateKey, 'raw', 'pem')

var pubKey64 = new Buffer(pemPublicKey).toString('base64')
var privKey64 = new Buffer(pemPrivateKey).toString('base64')

const vc = new VirgilCrypto()
var vcPriv = vc.importPrivateKey(privKey64)
var vcPub = vc.importPublicKey(pubKey64)

var enc = vc.encrypt('hello', vcPub)
console.log(enc)

var dec = vc.decrypt(enc, vcPriv)
console.log(dec.toString())