Republished from Hashnode The 2018 guide to writing (and testing) real world crowdsale contracts - Hashnode It's no secret - ICOs are all the rage these days. Many new companies are raising millions of dollars by selling their…hashnode.com It’s no secret — ICOs are all the rage these days. Many new companies are raising millions of dollars by selling their tokens in crowdsale. If you are reading this article, you are probably pursuing the idea of doing an ICO.