Signature URL - how one exactly constructs that?

crypto_coiner · September 4, 2015, 7:45am

https://docs.nubits.com/hosting-a-data-feed/

Anybody can indicate me how one constructs the signature URL for a data feed?

cryptog · September 6, 2015, 6:32am

Basically you use signmessage (address, message), address being for example an NSR address, the message being any message but here being the json file content that contains your vote. Then the output is a signature you put into a file on Github and then you indicate the URL to this file.

crypto_coiner · September 6, 2015, 7:46am

signmessage being a command on discuss.nubits.com?

willy · September 6, 2015, 8:36am

Nope, in your Nu client.

CoinGame · September 6, 2015, 8:42am

Sounds like we need to add this process to the docs. I’ll create an issue for it.

cryptog · September 6, 2015, 8:54am

Well no. One rpc command in nu client.

crypto_coiner · September 19, 2015, 12:35pm

Well, after some search , this seems to be giving some details —
Do you have to re-sign your voting data each time it changes?

Nu client 0.5.3 beta release

Nu client 0.5.3 beta release

I’m using the raw output from the json in Chrome browser and ‘select all’ and paste into sign message window of the wallet.

The signature check is very sensitive to content change, even white space or different line endings. All these intermediaries (the browser, copy/pasting, etc.) may alter the content.

I recommend using the the RPC commands instead to provide data feeds.

For example here is a batch script for windows that dumps your vote and signs it:
"C:\Program Files\Nu\daemon\nud.exe" getvote >"c:\MyDataFeed\vote.json"
"C:\Program Files\Nu\daemon\nud.exe" signmessage SedtEJa1dm6pSLagYXKvw5Sef3iH9VfwXC <"c:\MyDataFeed\vote.json" >"c:\MyDataFeed\vote.json.signature"
Replace the NSR address and the paths and save this to DumpVote.bat somewhere on your computer. Then you can just run it to dump your vote and the signature.

The Nu client must be running with RPC enabled (i.e. having server=1 and an rpcuser and rpcpassword in your nu.conf).

You can even add votenotify=c:\Path\To\DumpVote.bat to nu.conf to make the client dump your vote each time you modify it.

cryptog · September 19, 2015, 12:44pm

yes

crypto_coiner · September 21, 2015, 9:36am

Quite some info here too: https://docs.nubits.com/hosting-a-data-feed/

votenotify configuration

Providing votenotify the path to a script in your
conf file will invoke that script when votes are changed. For feed
providers this can be used to automatically update hosted voting data
when the feed provider manually changes votes. Here’s a sample script
that generates the voting data and vote signature with a supplied NSR
address.

#!/bin/bash

NUD=/path/to/nud
ARGS="-testnet"
VOTE_PATH=/path/to/output/vote.json
SIGNATURE_PATH=/path/to/output/vote.json.signature
ADDRESS=S…

$NUD $ARGS getvote >$VOTE_PATH
$NUD $ARGS signmessage $ADDRESS <$VOTE_PATH >$SIGNATURE_PATH

crypto_coiner · September 21, 2015, 9:44am

I guess I will plug into a feed when I cannot do otherwise, since hosting a data feed is quite cumbersome right now.

cryptog · September 21, 2015, 10:14am

Which part is cumbersome? I found it easy to set the feed generator overall on win.

crypto_coiner · September 21, 2015, 10:19am

Setting up my github account, then running another Nu client, generate my vote and their signature and upload these data each time they change into github

cryptog · September 21, 2015, 3:39pm

in my case i also set rpcport

crypto_coiner · December 2, 2015, 6:10am

As suggested by @cryptog, rpcport/port appear to be also needed. I’m getting a “couldn’t connect to the server” error right now.

crypto_coiner · March 31, 2016, 3:35pm

I reset my nu.conf file.
What value do I have to provide to rpcport and port in it to use the getvote option in windows bash?

Anyone? @sigmike?

CoinGame · March 31, 2016, 4:37pm

I think maybe there’s a misunderstanding here.

You have two clients. The QT app (GUI), and the daemon (headless).

The daemon (nud) runs as an RPC server by default, so you can send commands to it.

The QT (nu) does not have the feature enabled by default. In order to enable RPC commands against the QT app you must add server=1 to your conf file. Then you can run RPC commands against it like you do with the daemon.

I’m not sure why @cryptog is setting the RPC port in his conf file unless he wanted to use a port number besides the default.

You can see all of the default port numbers here: https://docs.nubits.com/rpc-api/

crypto_coiner · March 31, 2016, 10:25pm

That makes sense! txs

my nu.conf file:

addnode=198.52.199.75
addnode=218.1.18.78
addnode=212.114.48.31
addnode=212.129.19.120
addnode=176.9.113.75
addnode=84.76.78.204
addnode=167.114.116.72
addnode=79.165.43.191
addnode=52.10.23.117
addnode=97.123.141.92
addnode=108.26.50.128

server=1

rpcuser=xxx
rpcpassword=pass

This above should do then.

Now, is below a command against the daemon or the QT app?

“C:\Program Files (x86)\Nu\daemon\nud.exe” getvote > …

CoinGame · March 31, 2016, 10:32pm

That is the daemon, but it must already be running in daemon mode for you to do calls like that. launch it with:

"C:\Program Files (x86)\Nu\daemon\nud.exe --daemon"

Then you should see it as a running process. Then you can do RPC calls with it like in your example.

crypto_coiner · April 1, 2016, 12:43am

Sounds great.
–daemon is not recognized as a command on the bash though.

crypto_coiner · April 1, 2016, 2:36am

Weird:

I just ran

Creating data feed

“C:\Program Files (x86)\Nu\daemon\nud.exe” getvote >“C:\MyDataFeed\nu_data_feed\crypto_coiner_nu_data_feed.json”

Signing it

“C:\Program Files (x86)\Nu\daemon\nud.exe” signmessage SkQQBagedDma9tTekKLgdSNvZ29Ujyjprg <“C:\MyDataFeed\nu_data_feed\crypto_coiner_nu_data_feed.json” >“C:\MyDataFeed\nu_data_feed\crypto_coiner_nu_data_feed.json.signature”

and it seem to work, as the last time I updated my feed.
But, i did not run “C:\Program Files (x86)\Nu\daemon\nud.exe --daemon” and nud.exe is not running as background process