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react-native-eth-daemon's Introduction

React Native Eth Daemon

Getting started

$ npm install react-native-eth-daemon --save

Mostly automatic installation

$ react-native link react-native-eth-daemon

Manual installation

iOS

  1. In XCode, in the project navigator, right click LibrariesAdd Files to [your project's name]
  2. Go to node_modulesreact-native-eth-daemon and add RNEthDaemon.xcodeproj
  3. In XCode, in the project navigator, select your project. Add libRNEthDaemon.a to your project's Build PhasesLink Binary With Libraries
  4. Run your project (Cmd+R)<

Android

  1. Open up android/app/src/main/java/[...]/MainActivity.java
  • Add import com.reactlibrary.RNEthDaemonPackage; to the imports at the top of the file
  • Add new RNEthDaemonPackage() to the list returned by the getPackages() method
  1. Append the following lines to android/settings.gradle:
    include ':react-native-eth-daemon'
    project(':react-native-eth-daemon').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-eth-daemon/android')
    
  2. Insert the following lines inside the dependencies block in android/app/build.gradle:
      compile project(':react-native-eth-daemon')
    
  3. It's necessary to add to "build.gradle(Project)" this:
      allprojects {
        ...
        flatDir {
          dirs "$rootDir/../node_modules/react-native-eth-daemon/android/geth"
        }
      }
    

Add the Geth framework

After you added this project successfully to your's, there is still one thing left todo. You need to "include" the GethFramwork in your project. Follow the instructions to include the framework in your project.

Android

Open the "android" project of your React-Native app in Android Studio and add to "build.gradle(Project)" this:

allprojects {
    ...
    flatDir {
        dirs "$rootDir/../node_modules/react-native-eth-daemon/android/geth"
    }
}

iOS

First add to your project's "Build Phases" the following:

  • Target Dependencies: RNEthDaemon
  • Link Binary With Libraries: Geth.framework (you will need to search it inside ../node_modules/react-native-eth-daemon/ios/Frameworks)

Then, add to your project's "Build Settings", into "Framework Search Path": $(PROJECT_DIR)/../node_modules/react-native-eth-daemon/ios/Frameworks (recursive)

Usage

import RNEthDaemon from 'react-native-eth-daemon';

And then use the functions startDaemon/stopDaemon as follow inside your JS:

async function startFunction() {
  try {
    let result = await RNEthDaemon.start({
      enabledEthereum:true,
      networkID:3,
      enodesNumber:16,
      maxPeers:25,
      enabledWhisper:false
    });
    if (result == null) {
      Alert.alert('Node successfully started! :D');
    }
  } catch(e) {
    Alert.alert(e.message);
  }
}

async function stopFunction() {
  try {
    let result = await RNEthDaemon.stop();
    if (result == null) {
      Alert.alert('Node successfully stopped! :D');
    }
  }  catch(e) {
    Alert.alert(e.message);
  }
}

Development

  • We are using this git workflow. Please make sure to read it.
  • Make sure to prefix your git commit's with an "topic" like to [git] blacklisted .idea folder

react-native-eth-daemon's People

Contributors

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react-native-eth-daemon's Issues

[QA] profile the resources

When we are done with the daemon we should do a resource profiling for an hour or two to check if everything is running well.

no suitable peers available

Hi,

I am getting an Failed to retrieve data from network err="no suitable peers available" error.
I think it's related to the bootstrapping nodes. See here and here. Shortversion: light mode is still an experimental feature. You need special peer's that allow that feature (it must be enabled).

promise resolve / rejection

Hi,

some small canges about the resolve / reject of start / stop daemon.

Here and here it makes more sense to resolve the promise with "null" or "void". There is no need for a text message because a promise will never be resolved when there is an error.

I am not able to get the original geth error message here and here when the promise is rejected. I only see the text message which isn't really helpful since it don't provide information about the error. Can you change it to reject with the error from the geth lib? I attach an screenshot of what I mean:
bildschirmfoto 2017-12-30 um 11 51 42

[nameing] rename start / stop method

Hi,

can you please rename startDaemon to start and stopDaemon to stop?

Since the import look's like this: import Daemon from 'react-native-eth-daemon' start / stop makes more sense since we are calling it on Daemon.

[Android] App gets crashed on startDeamon call

Issue description

React Native app call startDaemon using this code:

import daemon from 'react-native-eth-daemon';

daemon.startDaemon({
        enabledEthereum:true,
        networkID: 3,
        enodesNumber:16,
        maxPeers:25,
        enabledWhisper:false
    }

App gets crashed with error:

A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 6364 (mqt_native_modu)

        [ 01-12 19:11:39.501  1262: 1262 W/         ]
        debuggerd: handling request: pid=5943 uid=10091 gid=10091 tid=6364

Debugging shows that crash happens in that line.

Expected behavior

App loads correctly without crash.

[daemon] start / stop methods

Feature

Since a user need's to connect to ethereum we need a start / stop functionality for the ethereum daemon.

Acceptance Criteria

  • startDaemon on ios
  • startDaemon on android
  • stopDaemon on ios
  • stopDaemon on android
  • Javascript bridge
  • JSON-RPC is started on localhost.
  • Config should be passed to the start method as an json object

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