Geth on ios not working

Question

I am currently experimenting with Geth on ios. I've imported Geth using cocoapods and trying to run the (light) node.

Config:

Geth version: 1.6.5 (but I have tried 1.6.1, 1.6.2, 1.6.3, 1.6.4 and 1.6.6-unstable)

OS & Version: OSX Sierra 10.12.5 / Xcode 8.3.2 (8E2002)

Language: Swift 3

Simply adding "import Geth" to my ViewController file crashes the LLBD RPC server on the simulator (or the app on a device). On the simulator it messes up the debugging tools of Xcode (break points, etc).

On the simulator the node seem to start but does not establish a connection with peers and does not synch.

The relevant code is as follows:

    let bootstrap = GethNewEnodes(2)
    do {
        try bootstrap?.set(0,enode: GethNewEnode("enode://20c9ad97c081d63397d7b685a412227a40e23c8bdc6688c6f37e97cfbc22d2b4d1db1510d8f61e6a8866ad7f0e17c02b14182d37ea7c3c8b9c2683aeb6b733a1@52.169.14.227:30303", &error))
        try bootstrap?.set(1, enode: GethNewEnode("enode://6ce05930c72abc632c58e2e4324f7c7ea478cec0ed4fa2528982cf34483094e9cbc9216e7aa349691242576d552a2a56aaeae426c5303ded677ce455ba1acd9d@13.84.180.240:30303"
, &error))
    } catch let ee {
        print(ee.localizedDescription)
        }

    // configuration of the nodes
    let config = GethNewNodeConfig()
    config?.setEthereumGenesis(GethTestnetGenesis())
    config?.setEthereumNetworkID(3)
    config?.setBootstrapNodes(bootstrap)
    config?.setEthereumEnabled(true)
    config?.setMaxPeers(25)
    config?.setWhisperEnabled(false)

    // create new node
    node = GethNewNode(nodeDir.path, config, &error)

        do {
            try node?.start()
        } catch let err {
            print("error: \(err.localizedDescription)")
        }

The node logs are:

WARN [06-14|11:33:30] Failed to start Ledger hub, disabling: unsupported platform 
INFO [06-14|11:33:30] Starting peer-to-peer node               instance=iGeth/v1.6.6-unstable/darwin-amd64/go1.8.3
INFO [06-14|11:33:30] Allocated cache and file handles         database=/Users/XXXX/Library/Developer/CoreSimulator/Devices/D1F71E22-095A-4B7B-8007-012A38A136CB/data/Containers/Data/Application/7871D2F6-1A0E-45D9-A48E-4170DF187020/Documents/ethereum/iGeth/lightchaindata cache=16 handles=16
INFO [06-14|11:33:30] Initialised chain configuration          config="{ChainID: 3 Homestead: 0 DAO: <nil> DAOSupport: true EIP150: 0 EIP155: 10 EIP158: 10 Metropolis: 9223372036854775807 Engine: ethash}"
INFO [06-14|11:33:30] Disk storage enabled for ethash caches   dir=/Users/XXXX/Library/Developer/CoreSimulator/Devices/D1F71E22-095A-4B7B-8007-012A38A136CB/data/Containers/Data/Application/7871D2F6-1A0E-45D9-A48E-4170DF187020/Documents/ethereum/iGeth/ethash count=3
INFO [06-14|11:33:30] Disk storage enabled for ethash DAGs     dir=/Users/XXXX/Library/Developer/CoreSimulator/Devices/D1F71E22-095A-4B7B-8007-012A38A136CB/data/Containers/Data/Application/7871D2F6-1A0E-45D9-A48E-4170DF187020/.ethash                         count=2
INFO [06-14|11:33:30] Loaded most recent local header          number=0 hash=419410…ca4a2d td=1048576
INFO [06-14|11:33:30] Starting P2P networking 
WARN [06-14|11:33:30] Light client mode is an experimental feature 
INFO [06-14|11:33:30] RLPx listener up                         self="enode://d390f94b00eb9326089e903799607d4445472e0bb96fca4488c66a5dfeaa8b195b0681a3d867ad33c067303b29ee4296dee95e499dfe5a286dff1152328a2801@[::]:49771?discport=0"

Am I doing something wrong (in particular with the configuration of the node)?

Any help would be greatly appreciated.

Answer 1

I fixed my issue by adding the --lightserv 90 flag when booting my private nodes (cause i'm using a private blockchain).

You should use the GethSetVerbosity(9) method to add so trace and debug in your xcode console. If you see a "useless peer" error it's because your server protocol doesn't match the node protocol. In my case I add only "les" protocol in my iOS node and only "eth" protocol in my private nodes.

However I don't know if you can specify a protocol on Rinkeby nodes.

I hope it will help you, good luck !