To keep things simple, only return key, cert, caCert

src/index.js

@@ -3,14 +3,6 @@
 const pify = require('pify');
 const pem = require('pem');
 
-const renameProps = keys => Object.keys(keys).reduce((renamedKeys, key) => {
-	const keyData = keys[key];
-	key = key === 'certificate' ? 'cert' : key === 'clientKey' ? 'key' : key;
-	renamedKeys[key] = keyData;
-
-	return renamedKeys;
-}, {});
-
 const createCert = opts => {
 	opts = Object.assign({
 		days: 365,
@@ -25,8 +17,9 @@ const createCert = opts => {
 		serviceKey: caKeys.serviceKey,
 		serial: Date.now()
 	}, opts)).then(keys => ({
-		keys: renameProps(keys),
+		key: keys.clientKey,
-		caKeys: renameProps(caKeys)
+		cert: keys.certificate,
+		caCert: caKeys.certificate
 	})));
 };