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Troubleshooting

QuickCrypto not found

If you get an error similar to this:

Cannot read property 'install' of undefined

Then you need to install react-native-quick-crypto as a dependency in your package.json file. Make sure to install pods (ios).

Android build errors

If you get an error similar to this:

Execution failed for task ':app:mergeDebugNativeLibs'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.MergeNativeLibsTask$MergeNativeLibsTaskWorkAction
   > 2 files found with path 'lib/arm64-v8a/libcrypto.so' from inputs:
      - /Users/osp/Developer/mac_test/node_modules/react-native-quick-crypto/android/build/intermediates/library_jni/debug/jni/arm64-v8a/libcrypto.so
      - /Users/osp/.gradle/caches/transforms-3/e13f88164840fe641a466d05cd8edac7/transformed/jetified-flipper-0.182.0/jni/arm64-v8a/libcrypto.so

It means you have a transitive dependency where two libraries depend on OpenSSL and are generating a libcrypto.so file. You can get around this issue by adding the following in your app/build.gradle:

React Native  

android/app/build.gradle file

packagingOptions {
  // Should prevent clashes with other libraries that use OpenSSL
  pickFirst '**/libcrypto.so'
}

Expo  

app.json file

...
  plugins: [
    ...
+   [
+     'expo-build-properties',
+     {
+       android: {
+         packagingOptions: {
+           pickFirst: ['**/libcrypto.so'],
+         },
+       },
+     },
+   ],
  ],

This caused by flipper which also depends on OpenSSL

This just tells Gradle to grab whatever OpenSSL version it finds first and link against that, but as you can imagine this is not correct if the packages depend on different OpenSSL versions (quick-crypto depends on com.android.ndk.thirdparty:openssl:1.1.1q-beta-1). You should make sure all the OpenSSL versions match and you have no conflicts or errors.