React Native Indy SDK

React Native Indy SDK wrapper.

Installation

with npm: $ npm install indy-sdk-react-native --save

with Yarn: $ yarn add indy-sdk-react-native

Link (for React Native lower than 0.60)

$ react-native link indy-sdk-react-native

Android

See https://github.com/TimoGlastra/ExampleRnIndySDK for an example android react native project that follows this tutorial.

1. Set min SDK version

Make sure there is a min. SDK version setup in android/build.gradle:

buildscript {
    ext {
        ...
        minSdkVersion = 21
        ...
    }
}

2. Add Sovrin Maven repository

Add Sovrin Maven repository into android/build.gradle:

allprojects {
    repositories {
        ...
        maven {
            url 'https://repo.sovrin.org/repository/maven-public'
        }
        ...
    }
}

3. Add JNA library dependency

Add to android/app/build.gradle:

dependencies {
    // ...
    implementation 'net.java.dev.jna:jna:5.2.0'

    // ...
}

4. Add Android libindy binaries

Download Android libindy binaries and copy them into android/app/src/main/jniLibs.

1. Create android/app/src/main/jniLibs directory in your project
2. Create subdirectories arm64-v8a, armeabi-v7a, x86 and x86_64 inside android/app/src/main/jniLibs.
3. Download the required libindy binaries for your release-channel and version
   • with stable channel and version 1.16.0 base url will be https://repo.sovrin.org/android/libindy/stable/1.16.0/
   • download the binaries for arm64, armv7, x86 and x86_64, e.g.:
     • libindy_android_arm64_1.16.0.zip
     • libindy_android_armv7_1.16.0.zip
     • libindy_android_x86_1.16.0.zip
     • libindy_android_x86_64_1.16.0.zip
4. Extract all downloaded ZIP files and copy libindy.so files to corresponding jniLibs directory
   • libindy_arm64/lib/libindy.so to jniLibs/arm64-v8a/libindy.so
   • libindy_armv7/lib/libindy.so to jniLibs/armeabi-v7a/libindy.so
   • libindy_x86/lib/libindy.so to jniLibs/x86/libindy.so
   • libindy_x86_64/lib/libindy.so to jniLibs/x86_64/libindy.so
5. Download the required JNA binaries from the JNA GitHub repo
   • libindy version 1.16.0 works with version 5.5.0 of JNA. In this case the base url is: https://github.com/java-native-access/jna/tree/5.5.0/lib/native
   • download the binaries for aarch64, armv7, x86, x86-64, e.g.:
     • android-aarch64.jar
     • android-armv7.jar
     • android-x86-64.jar
     • android-x86.jar
6. Extract all downloaded JAR files and copy libjnidispatch.so to corresponding jniLibs directory
   • You can extract the .so file from the jar using the jar command. e.g. jar xf android-x86.jar
   • libjnidispatch.so from android-aarch64.jar to jniLibs/arm64-v8a/libjnidispatch.so
   • libjnidispatch.so from android-armv7.jar to jniLibs/armeabi-v7a/libjnidispatch.so
   • libjnidispatch.so from android-x86.jar to jniLibs/x86/libjnidispatch.so
   • libjnidispatch.so from android-x86-64.jar to jniLibs/x86_64/libjnidispatch.so

5. Load indy library

Add the following to MainActivity.java:

//...

import android.os.Bundle;
import android.system.ErrnoException;
import android.system.Os;

public class MainActivity extends ReactActivity {
  //...

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    try {
      Os.setenv("EXTERNAL_STORAGE", getExternalFilesDir(null).getAbsolutePath(), true);
      System.loadLibrary("indy");
    } catch (ErrnoException e) {
      e.printStackTrace();
    }
  }
}

6. Hermes

Hermes is required in order to perform ledger operations using the Indy SDK.

For more info, see this Indy-SDK issue.

React Native >= 0.70.0

Hermes is enabled by default

React Native 0.62.0 - 0.69.5

Add or adjust the following in the android/app/build.gradle to:

project.ext.react = [
    enableHermes: true,  // clean and rebuild if changing
]

React Native <= 0.61.5

Hermes is not required for older versions of React Native

iOS

1. Install CocoaPods dependencies:

pod install --project-directory=ios/

2. Add the following line to the start of your Podfile (ios/Podfile):

source 'https://github.com/hyperledger/indy-sdk-react-native'

3. Configure Bitcode to no in both the project and targets

4. Set Build Libraries for Distribution to yes in both the project and targets

This is required due to mismatching Swift versions between the Indy SDK and the application, as described in this Stackoverflow Answer

5. iOS Simulators are currently not supported and should be disabled

Usage

import indy from 'indy-sdk-react-native'

await indy.createWallet({ id: 'wallet-123' }, { key: 'key' })

You can see example project here https://github.com/jakubkoci/UseReactNativeIndySdk/. It currently shows only usage on Android.

Known Errors

Add setup of external storage permissions (Android)

I found an error with permission while calling createWallet when I was testing this package:

2020-01-27 16:25:02.300 9955-10044/com.usereactnativeindysdk E/log_panics: thread 'unnamed' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 13, kind: PermissionDenied, message: "Permission denied" }': libcore/result.rs:945

Modify onCreate method in MainActivity of your project where you want to use this library in a following way:

public class MainActivity extends ReactActivity {
  ...
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    ...
    File externalFilesDir = getExternalFilesDir(null);
    String path = externalFilesDir.getAbsolutePath();
    System.out.println("externalFilesDir=" + path);

    try {
      Os.setenv("EXTERNAL_STORAGE", path, true);
    } catch (ErrnoException e) {
      e.printStackTrace();
    }
    ...
  }
  ...
}

This should resolve the issue with permissions.