Level up Your SDKs With KMP - no rewrite required!
summary
PubNub builds a Kotlin Multiplatform wrapper that delegates to existing native SDKs so one codebase publishes Kotlin, Swift and JS APIs; iOS integration uses CocoaPods + ObjC wrapper because Swift-only headers don’t bridge, JS requires handwritten externals after ts -> Kotlin tooling failed, and JVM/iOS/JS runtime mismatches (Longs, regex) force platform-specific implementations. Builds slow without target pruning, coroutines blow up JS bundle, but a common test suite finds runtime bugs and the Swift API ships while JS is still stabilizing.
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chapters (20)
- 0:00Introduction
- 1:30KMP state and SDK challenges
- 3:16KMP SDK goals and use cases
- 6:06PubNub project and KMP motivation
- 8:57KMP API architecture
- 11:27Kotlin Multiplatform setup
- 14:39Common API interface
- 16:03Moving code to common sets
- 18:56Platform-specific types handling
- 21:21Wrapping iOS SDK with CocoaPods
- 24:35JavaScript SDK integration
- 27:03JS config objects and type safety
- 29:56Kotlin.js type mapping
- 34:21Testing KMP across platforms
- 35:27Exporting native APIs
- 36:09Standard library limits
- 37:54JS dependencies and code size
- 38:58Optimizing native API output
- 39:38KMP tools and improvements
- 40:00Project outcomes
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13mUniting Native SDKs into KMP
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37mKotlin Multiplatform Library Development
40mKMP with non-Kotlin languages
26mKotlin Multiplatform in an MVVM World
34mIntegrating Kotlin/JS in a Kotlin Multiplatform library
36mEntering the World of Other Platforms Through KMP Gate