the exchange is coming along

You're applying to an exchange, or you're building an exchange?

building

super simple but should be fine

*https://github.com/snowblossomcoin/snowblossom/compare/876bb5013d66...4949568babf2* https://github.com/snowblossomcoin/snowblossom/commit/4949568babf2142cc978857fa7bcaee5a98ea0d7 - allow blocking stub