createKeyPairFromPrivateKeyString in KeyPair return type Any

[cfcodefans]

function createKeyPairFromPrivateKeyString(privateKeyString) {
var privateKey = _convert2.default.hexToUint8(privateKeyString);
if (Key_Size !== privateKey.length) throw Error('private key has unexpected size: ' + privateKey.length);

var publicKey = catapult.crypto.extractPublicKey(privateKey, catapult.hash.func);
return { privateKey: privateKey, publicKey: publicKey };

}

I tried but failed to find a type definition for KeyPair as { privateKey: privateKey, publicKey: publicKey }
This is confusing, since java api does have
org.nem.core.crypto.KeyPair

Why do not you use Account class instead? The method you are referring is from nem2-library-js, which it has the low-level implementations that shouldn't be used in favour of nem2-sdk classes, and because it's JavaScript, it hasn't the type definition.

Check Account.createFromPrivateKey here.

Java has the KeyPair class public, but it should be used the Account class too.