Fixes #904

[MiguelBebensee]

Issue: Invariant Violation: new NativeEventEmitter() requires a non-null argument on iOS when opening Drop-in (React Native 0.80.2)
Root cause: In v2.9.0, getWrapper.ts imports AdyenDropIn through a barrel re-export:

import { AdyenApplePay, AdyenDropIn, AdyenGooglePay, AdyenInstant } from '..';

This resolves through modules/index.ts, which re-exports from each submodule. On React Native 0.80.2 with Metro bundler, AdyenDropIn is undefined at the time getWrapper() is called, causing new NativeEventEmitter(undefined) to throw the invariant violation on iOS.

This was not an issue in v2.8.0 because getWrapper created a new wrapper instance each call (new DropInComponentWrapper()) using a directly imported native module, rather than referencing a pre-constructed singleton through a barrel export.

Fix: Replace the barrel import with direct imports:

import { AdyenDropIn } from '../dropin/AdyenDropIn';
import { AdyenApplePay } from '../applepay/AdyenApplePay';
import { AdyenGooglePay } from '../googlepay/AdyenGooglePay';
import { AdyenInstant } from '../instant/AdyenInstant';

This is likely not reproducible on RN 0.83.1 due to Metro bundler improvements in newer React Native versions.

[gemini-code-assist]

Summary of Changes

Hello @MiguelBebensee, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves a critical runtime error on iOS for React Native applications using Adyen's Drop-in component. The fix addresses an issue with module resolution in older React Native versions by modifying how specific Adyen components are imported, ensuring they are correctly defined when accessed.

Highlights

• Fixes Invariant Violation on iOS: Addressed an 'Invariant Violation: new NativeEventEmitter() requires a non-null argument' error occurring on iOS when opening Drop-in, specifically with React Native 0.80.2.
• Module Import Resolution: Resolved an issue where AdyenDropIn was undefined due to a barrel re-export mechanism in modules/index.ts when using Metro bundler on React Native 0.80.2.
• Direct Imports Implemented: Replaced the problematic barrel import for Adyen components (AdyenApplePay, AdyenDropIn, AdyenGooglePay, AdyenInstant) with direct imports from their respective module paths.

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Changelog

• src/modules/base/getWrapper.ts
  • Replaced barrel import with direct imports for Adyen components to resolve an 'Invariant Violation' on iOS.

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[gemini-code-assist]

Code Review

This pull request effectively resolves an invariant violation on iOS by replacing a problematic barrel import with direct imports in getWrapper.ts. This is a clear and direct fix for the circular dependency issue encountered with older React Native versions. The change improves the stability of module loading. I have one suggestion to further improve code maintainability.

[gemini-code-assist]

For improved code readability and maintainability, it's a good practice to keep import statements sorted alphabetically by path. This makes it easier to locate specific imports and can help prevent merge conflicts in the future.

Suggested change

	import { AdyenDropIn } from '../dropin/AdyenDropIn';
	import { AdyenApplePay } from '../applepay/AdyenApplePay';
	import { AdyenGooglePay } from '../googlepay/AdyenGooglePay';
	import { AdyenInstant } from '../instant/AdyenInstant';
	import { AdyenApplePay } from '../applepay/AdyenApplePay';
	import { AdyenDropIn } from '../dropin/AdyenDropIn';
	import { AdyenGooglePay } from '../googlepay/AdyenGooglePay';
	import { AdyenInstant } from '../instant/AdyenInstant';