Addressing the recent NPM supply chain attack by compromised author Qix (affecting pkgs like chalk-template, color-convert, strip-ansi):
Blitz is a React Native app, so yes, we use NPM. However, after reviewing our dependencies, we found that we are not using any of the malicious versions. Your wallets are safe!
Details: 

Socket
npm Author Qix Compromised via Phishing Email in Major Suppl...
npm author Qix’s account was compromised, with malicious versions of popular packages like chalk-template, color-convert, and strip-ansi published.