asset calulator with time
https://github.com/no7dw/asset_cal
usage:
var AssetFactory = require('asset_cal').assetFactory;
var af = new AssetFactory();
//define your assetobj like:
var assetobj = {
"amount":1000,
"rate":0.08,
"portfolio_id": "549922452238c54e98b750bc"
}
var earningValue = af.cal(assetobj);