Polyfills, Shims, and Native Modules: Lessons from Building a React Native Crypto Wallet
Preface: This article is about my experience building a crypto mobile wallet back in 2021. Intro Building a crypto wallet in React Native is a masterclass in edge-case architecture. Unlike standard mobile applications that simply fetch JSON from a REST API, a crypto wallet acts as an isolated cryptographic engine. It must generate entropy, derive keys, sign transactions, encode raw binary…
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