TypeError: Cannot read property 'getConstants' of null, js engine: hermes

[NathanACTech]

Description

I have install this module and tried to use the sample code you provide.
But I have TypeError: Cannot read property 'getConstants' of null, js engine: hermes.
I found that in @gooddolllar/react-native-facetec/src/FaceTechPublicApi.js, it calls FaceTechModule.getConstants() which seems like null.
How can I fix this?

[sirpy]

@johnsmith-gooddollar

[johnsmith-gooddollar]

@NathanACTech

1. The error happens because React couldn't find NativeModules.FaceTecModule defined here https://github.com/GoodDollar/ReactNativeFaceTec/blob/master/android/src/main/java/org/gooddollar/facetec/FaceTecPackage.java .
   a) check do you see any tasks related to :gooddollar_react-native-facetec during Gradle build
   b) maybe it fails to auto register, so you need to add it to Your build.gradle manually
   c) for more info read https://reactnative.dev/docs/libraries https://reactnative.dev/docs/native-modules-intro I used only official docs white developing this library.

2. Our app uses v8 https://github.com/GoodDollar/GoodDAPP/tree/master/android So this package never been ran & tested with Hermes. If You want to support Hermes, you have to fork & implement it by yourself. Am I right @sirpy ? We don't have to implement support for the engine we do not use in our projects, right ?

3. This library is strictly tied to our custom FV flow.
   a) it uses our server (yes, url is passed down as we have dev/qa/prod env). You could pass own but our server have a bit specific payload / response format.
   b) it implements custom error processing according to some requirements of our app. Like retries counter, types or "severities" of errors etc
   c) it uses JWT to auth with our server. you may have some other way to do it
   d) and it uses G$ design & branding you may want to replace with own

Assuming all from above - you have definitely to fork own version to use with Your app.
Also I suggest You to look at https://github.com/GoodDollar/GoodWeb3-Mono/blob/master/packages/sdk-v2/src/sdk/claim/sdk.ts#L24 - this is our dedicated, out-of-app FV server goodid.gooddollar.org. It allows You to assign an unique face identity with any Ethereum wallet address. You may not need to use whole library, just look the source I've linked to understand how to generate FV id and verify url from address. Then just open it from in-app browser.

Good luck!