401 Unauthorized when connecting via JSON-RPC

Question

Hi,

I'm trying to build a Ruby client for the JSON-RPC service, but I can't seem to connect. I'm taking the username and password from the `multichain.conf` file, and I've added `rpcallowip=my-ip-address` to the same file. After restarting the client, I'm getting a 401 error.

My multichain.conf file looks like this:

rpcuser=multichainrpc
rpcpassword=mypassword
rpcallowip=my-ip-address

And I'm trying to connect with the following url:

http://multichainrpc:mypassword@the-ip-address:2898

 Any ideas where I'm going wrong?

Cheers

Answer 1

Hi, you might want to take a look at one of the libraries that has been built for connecting to Bitcoin Core, since MultiChain's API works in exactly the same way: https://github.com/sinisterchipmunk/bitcoin-client

Also make sure you restart MultiChain after setting up the configuration in multichain.conf

Comments

OK, I can get in via the Bitcoin Client. I must be missing something my end then. Will report back if I find anything. Thanks!

Answer 2

Hey I just started building an explorer for my new test blockchain, feel free to look at the source on Github, I would appreciate a shoutout in your code back to my repo or git username ;)

https://github.com/Padchain/Explorer

Specifically, take a look at services/bitcoin_rpc.rb @ https://github.com/Padchain/Explorer/blob/master/app/services/bitcoin_rpc.rb

If you go with this implementation you can query your data as shown:

@info = BitcoinRpc.new('http://multichainrpc:' + ENV['PADCHAIN_NODE_KEY'] + '@' + ENV['PADCHAIN_NODE_ADDRESS'] + ':6306/').getinfo

 

Also be sure to check multichain.conf/params.dat to whitelist the IP you are connecting from. By default, Multichain only allows RPC calls from localhost.

Comments

Cool, thanks. That's the approach we took in the end. I was using the json-rpc gem to connect, but just connecting via any old HTTP library worked.

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Great to help! Please upvote me or select as answer :). Happy developing.

Answer 3

I got the same 401 error. 

This is how I resolve this 401 problem:

https://github.com/HemingwayLee/multichain-cheatsheet

In short, there are 2 multichain.conf files.

I allow access by modifying ~/.multichain/multichain.conf

```
rpcallowip=0.0.0.0/0
rpcport=7434
```

The rpcuser and rpcpassword will be generated automatically in ~/.multichain/chain1/multichain.conf, for example:

```
rpcuser=multichainrpc
rpcpassword=j3536YzAeJMXRZXLkt94bqmeWYWaKGNjETtDwAN2w6T
```

After putting rpcuser and rpcpassword to Basic Auth. 
I am able to send JSON-RPC successfully.