AlethZero requires jsonrpc

andmac

Hi, I've been following the ubuntu instructions but I cant seem to get JSON-RPC installed correctly. Im getting Cmake Error at CMakeLists.txt:154(message): Alethzero requires jsonrpc when trying the final client build. Can anyone help?

andmac

in the final step it says Failed to find the jsonrpc headers.

deskenny

Yes I have the same problem. Built and got it all running on a different machine night before last, but now on a second machine I'm hitting this problem. I'm following https://github.com/ethereum/cpp-ethereum/wiki/Building-on-Ubuntu

alexey_petrenko

Same problem here. Doublechecked, I installed jsonrpc correctly following the instruction

deskenny

just looking at the git history for libjsqrc, on Friday Gav Wood merged in a pull request from debris/mk_jsonrpc. I think that might be the problem. I've rolled back locally here to commit before the merge and and rebuilt. Worked then

deskenny

So to rollback to before Gavs merge, I did,

git checkout 8766c104bfa9c20ececd1cd0fada1eab8f262355

then rebuilt in build dir by

cmake .. -DCMAKE_BUILD_TYPE=Release && make

The problematic checkin was 205a464253b5e07daf34171f1936c65dbfda5b65 on Fri 31 Oct 2014 16:49:36 GMT

I'll message Gav to let him know. Hope it helps

alexey_petrenko

I tried to checkout "master" branch instead and it didn't work, I could not connect to the network. Maybe protocol has changed since last commit on master.

alexey_petrenko

Oh, its okay now, thanks for recommendation!

deskenny

are you able to connect to peers? someone on irc was saying he couldnt and I cant either, even though I can compile and run now at least

alexey_petrenko

Using commit 8766c104bfa9c20ececd1cd0fada1eab8f262355 I was able to connect to peers but contract submission doesn't work. See discussion in this thread: https://forum.ethereum.org/discussion/1402/how-to-get-started-your-first-dapp-under-one-hour

deskenny

well you had more success than me then ... Got the UI up, but couldnt get it connecting to peers! Switched to master also, but just different errors. Hopefully they'll have dev branch fixed later today, might retry tonight.

marq

jsonrpc is not required dependency for AlethZero.
Here is wiki page, hot to build it on ubuntu:

https://github.com/ethereum/cpp-ethereum/wiki/Building-on-Ubuntu#jsonrpc-from-source

on MacOS you can just simply write

brew install jsonrpc

Sry for problems, in future i will update the wiki/docs before the merge && make build messages more explicit

We are also working to some buildout system which would resolve dependencies automatically.

@deskenny jsonrpc dependency is not releated with connecting to peers. Can you create new issue on github with details of the problem?

deskenny

no worries. Thanks Marc. I'm at work at the moment, but will try to give it another go tonight/tomorrow night.

Thanks for the reply

alexey_petrenko

Also should say, there is a line in the Ubuntu building tutorial which says "To test this is working after you launched eth, check the coinbase with cURL:
curl -X POST --data '{"jsonrpc": "2.0","method": "coinbase","params": null,"id": 1}' http://localhost:8080
"

This didn't work for me. First of all, as I understand, eth uses port 30303, not 8080. Even if I change this to 30303, I see errors in eth log, similar to:

+N+ [ 02:46:17 | p2p ] Accepted connection from 127.0.0.1:38842
+N+ [ 02:46:17 | p2p ] Listening on local port 30303 (public: 10.0.2.15:30303 )
!N! [ 02:46:17 | p2p | 137 ] INVALID SYNCHRONISATION TOKEN; expected = 22400891; received = 504f5354
+N+ [ 02:46:17 | p2p | 137 ] Disconnecting (our reason: Data format error. )
+N+ [ 02:46:17 | p2p | 137 ] Closing 127.0.0.1:38842 ( Data format error. )
!N! [ 02:46:17 | p2p | -1 ] Error sending: Bad file descriptor


Maybe this can just be updated according to new format.

deskenny

@marq - That little cleanup seems to have done the trick. Thanks.