Just published react-native-ssb-client https://www.npmjs.com/package/react-native-ssb-client

API looks like ssb-client, but is meant to be used in a React Native app. See my sandbox repo, branch sbot for an example usage. Basically just put "react-native-ssb-client": "1.0.4" in package.json dependencies, then in index.android.js, import ssbClient from 'react-native-ssb-client'; and use ssbClient like you usually would use the npm package ssb-client.