feat(android): support API 24 setup-free

API.md

@@ -9,6 +9,12 @@ This document describes the public TypeScript API for
 npm install @0xsequence/oms-react-native-sdk
 ```
 
+## Native Requirements
+
+Android apps need `minSdk` 24 or newer, `compileSdk` 34 or newer, and Java 17
+compile options. The SDK does not require app-level core library desugaring or a
+custom Kotlin version override.
+
 ## Client
 
 ```ts

CHANGELOG.md

@@ -7,6 +7,17 @@ Versions follow [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ---
 
+## [0.1.0-alpha.4] — 2026-06-26
+
+### Changed
+- Lowered the Android OMS SDK requirement to `minSdk 24`.
+- Aligned Android Kotlin, coroutine, and serialization versions with current
+  React Native and Expo defaults.
+
+### Fixed
+- Removed the need for Expo and bare React Native apps to raise Android
+  `minSdk`, override Kotlin, or enable core library desugaring for OMS.
+
 ## [0.1.0-alpha.3] — 2026-06-26
 
 ### Added

README.md

@@ -144,7 +144,7 @@ See [API.md](./API.md) for the public API surface and TypeScript shapes.
 ## Native SDK Dependencies
 
 The React Native SDK owns its native SDK dependencies. Android resolves
-`io.github.0xsequence:oms-client-kotlin-sdk:0.1.0-alpha.3` from Maven, and iOS
+`io.github.0xsequence:oms-client-kotlin-sdk:0.1.0-alpha.4` from Maven, and iOS
 resolves `oms-client-swift-sdk` `0.1.0-alpha.3` from CocoaPods.
 
 The React Native wrapper itself is distributed through npm. React Native
@@ -159,8 +159,9 @@ on the underlying native SDKs.
 - Bare React Native apps are supported through normal React Native autolinking.
 - Expo apps must use a development build, Expo prebuild/EAS Build, or the bare
   workflow. Expo Go cannot load this SDK because it includes custom native code.
-- Android apps need `minSdk 26`, `compileSdk 34` or newer, and Java 17 compile
-  options.
+- Android apps need `minSdk 24`, `compileSdk 34` or newer, and Java 17 compile
+  options. No app-level core library desugaring or Kotlin version override is
+  required for OMS.
 - iOS apps need deployment target 15.0 or newer.
 - OIDC redirect auth requires the consuming app to configure its own URL scheme
   or app links.
@@ -171,9 +172,8 @@ on the underlying native SDKs.
 - `examples/trails-actions-example` is the bare React Native demo for OMS wallet
   flow with Trails action resolution.
 - `examples/expo-example` is a standalone Expo development-build demo that uses
-  `expo-web-browser` and the published npm package. It is intentionally
-  excluded from the root Yarn workspace so it is not linked to the local SDK
-  source. Its dependency is not updated until this SDK version is published.
+  `expo-web-browser` and the npm package. It is intentionally excluded from the
+  root Yarn workspace so it is not linked to the local SDK source.
 
 ## Publishing
 

android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
   ext.OmsClientReactNativeSdk = [
-    kotlinVersion: "2.3.20",
-    minSdkVersion: 26,
+    kotlinVersion: "2.1.20",
+    minSdkVersion: 24,
     compileSdkVersion: 36,
     targetSdkVersion: 36,
-    omsClientKotlinSdkVersion: "0.1.0-alpha.3",
-    kotlinxCoroutinesVersion: "1.11.0",
-    kotlinxSerializationJsonVersion: "1.11.0"
+    omsClientKotlinSdkVersion: "0.1.0-alpha.4",
+    kotlinxCoroutinesVersion: "1.10.2",
+    kotlinxSerializationJsonVersion: "1.8.1"
   ]
 
   ext.getExtOrDefault = { prop ->

android/src/main/java/com/omsclientreactnativesdk/OmsClientReactNativeSdkModule.kt

@@ -98,7 +98,7 @@ class OmsClientReactNativeSdkModule(reactContext: ReactApplicationContext) :
           Arguments.createMap().apply {
             putString("clientId", clientId)
             putMap("session", sessionMap(event.session))
-            putString("expiredAt", event.expiredAt.toString())
+            putString("expiredAt", event.expiredAt)
           }
         )
       }
@@ -707,7 +707,7 @@ class OmsClientReactNativeSdkModule(reactContext: ReactApplicationContext) :
   private fun sessionMap(session: OMSClientSessionState?): WritableMap =
     Arguments.createMap().apply {
       putNullableString("walletAddress", session?.walletAddress)
-      putNullableString("expiresAt", session?.expiresAt?.toString())
+      putNullableString("expiresAt", session?.expiresAt)
       putNullableString("loginType", session?.loginType?.name)
       putNullableString("sessionEmail", session?.sessionEmail)
     }

examples/expo-example/app.json

@@ -14,15 +14,7 @@
       "package": "com.sequence.oms.expoexample"
     },
     "plugins": [
-      "expo-web-browser",
-      [
-        "expo-build-properties",
-        {
-          "android": {
-            "minSdkVersion": 26
-          }
-        }
-      ]
+      "expo-web-browser"
     ]
   }
 }

examples/expo-example/package.json

@@ -12,9 +12,8 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
-    "@0xsequence/oms-react-native-sdk": "0.1.0-alpha.2",
+    "@0xsequence/oms-react-native-sdk": "0.1.0-alpha.4",
     "expo": "~56.0.8",
-    "expo-build-properties": "~56.0.17",
     "expo-dev-client": "~56.0.19",
     "expo-web-browser": "~56.0.5",
     "react": "19.2.7",