@react-native-module/randombytes/README.md

implementation of randomBytes for React Native

# react-native-module/randombytes

## Usage

```js
import { randomBytes } from "@react-native-module/randombytes";

// synchronous API
const rand = randomBytes(4);

// asynchronous API
// uses iOS-side SecRandomCopyBytes
randomBytes(4, (err, bytes) => {
  // bytes is a Buffer object
  console.log(bytes.toString("hex"));
});
```

## Installation

This module has peerDependency "react", "react-native"

A typical workflow:

```
npm install --save @react-native-module/randombytes
```

```
yarn add @react-native-module/randombytes
```

### Automatic - Android / iOS (recommended)

```bash
react-native link
```

### Manual

If Automatic installation failed you, dry your tears and read on.

#### `iOS`

- Drag RNRandomBytes.xcodeproj from node_modules/react-native-randombytes into your XCode project.

- Click on the project in XCode, go to Build Phases, then Link Binary With Libraries and add `libRNRandomBytes.a`

Confused? See an example with screenshots [here](http://facebook.github.io/react-native/docs/linking-libraries-ios.html#content)

#### `Android`

- Update Gradle Settings

```gradle
// file: android/settings.gradle
...

include ':randombytes', ':app'
project(':randombytes').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-randombytes/android')
```

- Update Gradle Build

```gradle
// file: android/app/build.gradle
...

dependencies {
    ...
    compile project(':randombytes')
}
```

- Register React Package

```java
...
import com.bitgo.randombytes.RandomBytesPackage // import

public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {

    private ReactInstanceManager mReactInstanceManager;
    private ReactRootView mReactRootView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mReactRootView = new ReactRootView(this);
        mReactInstanceManager = ReactInstanceManager.builder()
                .setApplication(getApplication())
                .setBundleAssetName("index.android.bundle")
                .setJSMainModuleName("index.android")
                .addPackage(new MainReactPackage())
                .addPackage(new RandomBytesPackage()) // register package here
                .setUseDeveloperSupport(BuildConfig.DEBUG)
                .setInitialLifecycleState(LifecycleState.RESUMED)
                .build();
        mReactRootView.startReactApplication(mReactInstanceManager, "AwesomeProject", null);
        setContentView(mReactRootView);
    }
...

```

### `Windows`

```bash
react-native link react-native-randombytes
```

Depending on your project versions and the state of RN-Windows this may not always work. If it does not, a manual installation guide can be found here:

https://github.com/Microsoft/react-native-windows/blob/master/docs/LinkingLibrariesWindows.md