[Ethereum] n iOS equivalent for the Android web3j (json-rpc) library

There are some guys who are running geth on Android and iOS. you could find the libs and the apk project. But seriously, you need to wait the light protocol client because it is a bit insane to use a full client (Many Go of storage + so many writes that it will use battery and storage longevity).

Look this:

Android

• Ethereum on Android: https://www.reddit.com/r/ethereum/comments/3wx09s/experimental_android_geth_library_archive/
• LES (Light client protocol): https://github.com/ethereum/wiki/wiki/Light-client-protocol
• Karalabe (one dev of geth): What can I use to interact with the Ethereum network from an Android device?

The geth with LES is in test currently. I have made few benchmarks:

• 600MB disk storage (4GB of write) vs 4.8GB for fast synch
• 20min to synchronize vs 21min for fast synch

iOS

• Native implementation on Swift of geth functionality: web3swift

The wallet file is your encrypted private key file. you have the choice to :

1-use the private key file from the web3js or ethereum keystore.

AppData/Ethereum/keystore (geth)
AppData/Web3/keys (eth)

you will find something like :

Ethereum\keystore\UTC--2017-1-20T11-51-50.069518500Z--637f383c240g512be19d3ffa3b45d7f03babf091

use it a second parameter in WalletUtils.loadCredentials

2- creating the wallet fine using web3j

String fileName = WalletUtils.generateNewWalletFile(
        "your password",
        new File("/path/to/destination"));

3-use Myetherwallet to export your 'wallet' as a json file.