Another Price Feed Publishing Tool for Witnesses by yabapmatt

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utopian-io · @yabapmatt · (edited)
$179.59
Another Price Feed Publishing Tool for Witnesses
![price_feed.JPG](https://res.cloudinary.com/hpiynhbhq/image/upload/v1518385543/wcdcbqby26icuapqlst3.jpg)

As most witnesses know the popular [SteemFeed JS](https://github.com/Someguy123/steemfeed-js) tool created by @someguy123 stops working fairly often. The workaround for this has been to set it to automatically restart every couple hours using a cron job. I've been having a lot of trouble with this lately when even the cron job restart wasn't working.

When I lost @drakos's witness vote due to my price feed being stale (which is a good reason for him to remove his vote - so kudos to him for being on top of that!) I decided it's time to take matters into my own hands!

I'm sure there are other great feed publishing options that work quite well, but as a developer I usually prefer to create my own tools. Not only does it give me full control over how they work but also it's a great learning experience. You have to really understand how something works to build software that automates it.

So I created my own JavaScript/NodeJS price feed publishing software which you can find here: [https://github.com/MattyIce/pricefeed](https://github.com/MattyIce/pricefeed)

The configuration options are pretty standard:
```
{
  "rpc_nodes": [											// List of RPC nodes to use
    "https://api.steemit.com",
    "https://rpc.buildteam.io",
    "https://steemd.minnowsupportproject.org",
    "https://steemd.privex.io",
    "https://gtg.steem.house:8090"
  ],
  "account": "witness_account_name",						// Name of your Steem witness account
  "active_key": "witness_account_private_active_key",		// Private active key of your Steem witness account
  "interval": 60,											// Number of minutes between feed publishes
  "peg_multi": 1											// Feed bias setting, quote will be set to 1 / peg_multi
}
```

As you can see it supports RPC node failover using code borrowed from the Post Promoter voting bot software. If a feed publish transaction fails it will retry once per minute 5 times. After that it will switch to the next RPC node on the list and try that. I'm hoping this will be pretty resilient to the various issues that can arise and keep plugging along publishing prices without much maintenance or upkeep.

It currently pulls the price from the coinmarketcap.com API which takes an average price from all of the different exchanges on which STEEM trades. It would be pretty simple to update the code to pull from any different source that provides a REST API though if needed.

The code is pretty simple, the entire program is only about 75 lines of code (many of which are logging statements), but here's the method to publish the actual feed transaction:

```
function publishFeed(price, retries) {
  var peg_multi = config.peg_multi ? config.peg_multi : 1;
  var exchange_rate = { base: price.toFixed(3) + ' SBD', quote: (1 / peg_multi).toFixed(3) + ' STEEM' };

  log('Broadcasting feed_publish transaction: ' + JSON.stringify(exchange_rate));

  steem.broadcast.feedPublish(config.active_key, config.account, exchange_rate, function (err, result) {
    if (result && !err) {
      log('Broadcast successful!');
    } else {
      log('Error broadcasting feed_publish transaction: ' + err);

      if (retries == 5)
        failover();

      if (retries < 10)
        setTimeout(function () { publishFeed(price, retries + 1); }, 60 * 1000);
    }
  });
}
```

The code first checks if there is a price feed bias set via the "peg_multi" property in the config.json file. Then it creates the "exchange_rate" JSON object which contains the "base" and "quote" prices. Finally it broadcasts the "feed_publish" transaction using the [Steem JS Library](https://github.com/steemit/steem-js) steem.broadcast.feedPublish() function.

Then it checks the response of the broadcast and if there was an error it tries again every minute and fails over to the next RPC node on the list after 5 failed attempts.

## Thanks for your support!
As always I want to thank everyone who has supported my work. It would not be possible without you! Hopefully this tool will help other Steem witnesses run a stable and reliable price feed that doesn't require much maintenance. Also I should note that GINAbot now reports stale price feeds so all witnesses should sign up for that service if they haven't already!

Please see the GitHub project for more details on setup and installation of the tool: [https://github.com/MattyIce/pricefeed](https://github.com/MattyIce/pricefeed)

<br /><hr/><em>Posted on <a href="https://utopian.io/utopian-io/@yabapmatt/another-price-feed-publishing-tool-for-witnesses">Utopian.io -  Rewarding Open Source Contributors</a></em><hr/>
πŸ‘  , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and 33 others
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vote details (97)
@rezatoga · 
The best master post
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@yanosh01 · 
you are doing a great work in this platform @yabapmatt
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@tngflx ·
$0.87
A coding master and a kind and helpful witness. Thanks for providing another tool for steemit. Im learning Javascript to match you guys one day! Youre the best :)
πŸ‘  , , , ,
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vote details (5)
@ixonitmedia · 
I have just sign up for utopian.io 
But i don't know how to get started
πŸ‘  
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vote details (1)
@gmuxx ·
$1.02
Awesome, I have had my price feed not update a few times so may try this out. I like how it has fallback if a node isn't available.
πŸ‘  
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@charliechain · 
Thanks for providing another important tool for steemit . Really this is helpful.have a nice day.
πŸ‘  
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vote details (1)
@helo ·
$1.59
Thank you for the contribution. It has been approved.

Great job on price feeder, and nice touch with the nodejs instructions.  It used to always gives me trouble on Ubuntu.

You can contact us on [Discord](https://discord.gg/uTyJkNm).
**[[utopian-moderator]](https://utopian.io/moderators)**
πŸ‘  
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@utopian.tip · 
Hey @helo, I just gave you a tip for your hard work on moderation. Upvote this comment to support the utopian moderators and increase your future rewards!
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@komodo-dragon · 
<h3>INFORMING THE MASSES - A short list of some of the abuses against @Noganoo by Satanic whales on Steemit.<h3>

<h3>For those of you who are unaware @Noganoo was sexually abused when he was 5 years old.  Bernie Sanders learned this from Fyrstikken whom Noganoo trusted and confided in and then was betrayed and slandered by Fyrstikken whom Noganoo brought to Steemit.  Noganoo only requested that Fyrstikken send back the 10 Bitcoins he stole from SatoshiHorizon through his β€œaltcoin investment fund.” Noganoo stood up against Bernie's flag abuse towards SeaBlue which caused the war that you are seeing today.  Bernie swore to destroy Noganoo because Noganoo defended the helpless minnows on Steemit.  Below are just a few of the terrible insults they have spoken against this Christian man.  Please visit @Noganoo's blog and support and encourage him through these demonic attacks as his old friends have forsaken him.  Not only do these people verbally attack Noganoo but they antagonize him until he responds in anger, then they sent the FBI to his house for "threatening."  Noganoo has requested to all of the whales on steemit directly for them to speak to these 2 fraudsters and tell them to stop.  Not a word was said in one year and now he is resorting to further action.  The abuse will stop.  If you have any information as to the identity or whereabouts of BernieSanders or Pfunk please contact abuse@steem.in.  There is a substantial reward and you can remain anonymous.  Noganoo is unable to file a restraining order against these 2 until he finds their identity.  BernieSanders is a pedophile and should not be rewarded with upvotes on Steemit.</h3>

<h3>First of all let's go back to before this all started.  Noganoo was investigating the fraud and theft of 10s of millions of dollars of rewards by Donkeypong, Gavvet, HanshotFirst, Kevinwong, The-Alien, JrCornel, Sweetsssj and Knozaki2015 with their organization called "SteemGuild" where they used the Steemit Co-founder Ned's account to vote for themselves instead of the "minnows" they claimed to be supporting.  Go look at all of their current account values and you can see that over 1 year ago Noganoo was right! They paid themselves multi-millions for only a couple months of curating on Steemit. Something the rest of us do for free.  You can see that these people and their friends are the only people who have ever attacked Noganoo.  They are trying to cover up their theft.  If you go back on the blockchain you can see Noganoo's accounts previously supported most of these authors with his thousand bot voters early on in the platforms launch.  https://steemd.com/@sweet-banana?page=17   Then Noganoo called out The-Alien for his common use of the word "Motherfucker" in his fiction stories that were upvoted by their "Steemguild" to number one on trending every day to "raise money for the guild."  Fact is they stole millions of dollars.  This rebuke prevented Noganoo from ever getting an upvote from that guild which controlled over 30% of the voting power on Steemit at the time.</h3>

![2017-03-10 08_06_14-(β€’) Steemit Chat (1).png](https://steemitimages.com/DQmQtwzEiYJXjGkzJvwBSCwPEzt2gXw45CRDZmtfRQk7Bbo/2017-03-10%2008_06_14-(%E2%80%A2)%20Steemit%20Chat%20(1).png)

<h3>"Sorry, I should have said "Go fuck your cousin." (again)</h3>
![2018-02-01 13_40_22-.png](https://steemitimages.com/DQmW8Ny1uzFBKuyv9JWmgjZMy6A93WssJwchCUZjDw2Dqik/2018-02-01%2013_40_22-.png)

<h3>Here is Pfunk attacking Noganoo's girlfriend.</h3>
![pfunk.png](https://steemitimages.com/DQmVDG769WQjKenrEwVJpYeKvsw5QewWWbd2x1F9LJw2Khx/pfunk.png)

<h3>Here Bernie tries to twist the truth and calls him an "incestuous criminal."  Bernie is trying to convince the unknowing public that Noganoo is a sex criminal.</h3>
![2018-02-01 13_30_07-.png](https://steemitimages.com/DQmNV8mHo9EfCtTXv69ZvpT9bHhPuuZ2DWjVaxUZyM8C1tm/2018-02-01%2013_30_07-.png)

<h3>I'll save you a spot beside me in hell to torment you with incestuous dick art for all eternity.</h3>
![2017-09-07 06_51_29-.png](https://steemitimages.com/DQmQGzQqjbVJyYUgM6kUHmvmPR7yq39zDySGtdVWZL5mqSG/2017-09-07%2006_51_29-.png)

<h3>I'm pretty sure (noganoo) was molested by somone in the church.</h3>
![2017-03-17 18_19_18-(β€’) Steemit Chat.png](https://steemitimages.com/DQmck7wTfQnapFFSHXvAcpboaRM35pCKfrmiWCJQyK9Z98G/2017-03-17%2018_19_18-(%E2%80%A2)%20Steemit%20Chat.png)

<h3>Incestuous Scumbag, I bet the abuse never even happened and you are trying to gain sympathy</h3>
![2017-05-17 06_46_18-Noganoo - Hero_ Victim_ Menace_ And what about you_ β€” Steemit.png](https://steemitimages.com/DQmX4koQufBEDU8KVd7jxQv61PCQc9NSrwEhSgEjWDXkkfD/2017-05-17%2006_46_18-Noganoo%20-%20Hero_%20Victim_%20Menace_%20And%20what%20about%20you_%20%E2%80%94%20Steemit.png)


![2017-06-21 16_57_34-2017-06-21 16_47_08-Replies to nOgAnOo (@noganoo) β€” Steemit - Windows Photo View.png](https://steemitimages.com/DQmY2Ybr6qsu7Jj7QfrEmtxkpWoTSUTJNUVWgkBnrViPT5d/2017-06-21%2016_57_34-2017-06-21%2016_47_08-Replies%20to%20nOgAnOo%20(%40noganoo)%20%E2%80%94%20Steemit%20-%20Windows%20Photo%20View.png)

<h3>Here is Pfunk 2 years ago violently attacking an article Noganoo wrote about Christianity,  Pfunk at the time had no idea Noganoo wrote this!  Pfunk is a hater of true Christians but aligns himself with the fake Christians so he can get more witness votes and doesn't lose support.  Pfunk proceeded to individually message everyone that upvoted Noganoo and slander him and threaten them with loss of support if they continue to upvote his articles.  Pfunk, Berniesanders and Ausbitbank costed Noganoo over 50,000 dollars in losses last year.  Ausbitbank attacked Noganoo to impress his witness friends when Noganoo is the one who brought him to Steemit.  He brought Noganoo’s reputation from 68 down to zero with stolen Steempower provided by JamesC</h3>
![2018-02-14 03_25_39-.png](https://steemitimages.com/DQmcnMRJYRg1kwRU536ZfJ8fmjg17nUMcZr7XqWgUMAhk3Q/2018-02-14%2003_25_39-.png)

<h3>The light shines in the darkness, and the darkness has not overcome it. - John 1:5</h3>
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@samrg472 ·
$0.02
Beat me to it! I've been needing this since the other script has been really unreliable recently. Thanks for creating it.
πŸ‘  
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vote details (1)
@therealwolf · 
@samrg472 same here ..
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@dandida · 
@yabapmatt sorry to bother you on your post but please looking into the voting bot @boomerang. it is taking bids but not upvoting. myself and many others have lost our money and there's no response. please help us
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@dandida · 
if you look at boomerang's latest post and in the comment section you will see all the complaint, including mine. thanks
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@therealwolf · 
Thanks matt! Really appreciate that - pricefeed was fairly inconsistent the last few days.
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@utopian-io · 
### Hey @yabapmatt I am @utopian-io. I have just upvoted you!
#### Achievements
- Seems like you contribute quite often. AMAZING!
#### Community-Driven Witness!
I am the first and only Steem Community-Driven Witness. <a href="https://discord.gg/zTrEMqB">Participate on Discord</a>. Lets GROW TOGETHER!
- <a href="https://v2.steemconnect.com/sign/account-witness-vote?witness=utopian-io&approve=1">Vote for my Witness With SteemConnect</a>
- <a href="https://v2.steemconnect.com/sign/account-witness-proxy?proxy=utopian-io&approve=1">Proxy vote to Utopian Witness with SteemConnect</a>
- Or vote/proxy on <a href="https://steemit.com/~witnesses">Steemit Witnesses</a>

[![mooncryption-utopian-witness-gif](https://steemitimages.com/DQmYPUuQRptAqNBCQRwQjKWAqWU3zJkL3RXVUtEKVury8up/mooncryption-s-utopian-io-witness-gif.gif)](https://steemit.com/~witnesses)

**Up-vote this comment to grow my power and help Open Source contributions like this one. Want to chat? Join me on Discord https://discord.gg/Pc8HG9x**
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@lays ·
$0.25
@yabapmatt Brother please talk to me i have been removed from your bot list due to a person make false blame you can ask any question i am trustworthy i will answer you
πŸ‘  
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vote details (1)
@yabapmatt · 
@lays please contact me on Discord or [Steemit.Chat](https://steemit.chat) and we can discuss further.
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@libertyranger · 
@lays made good on his votes
I have offrerd my help communicating with vote guyers for him if in the future he ever gets buried again with request like happened this time.
properties (22)
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@libertyranger · (edited)
$1.02
FIXED!
![](https://steemitimages.com/DQmTfYmNan6zXBHEvnZ3XW8L6M2npNdnenC6ceioKXDpgtU/image.png)
@yabapmatt in one feel swoop earneds my witness vote
![](https://steemitimages.com/DQmVbQiDu67atCZy7rvLPsPUcFXUTwJk5WLFpTReQHjHG92/image.png)
πŸ‘  
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vote details (1)
@yabapmatt · 
Thank you! Glad it has helped you!
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@fireonxas · 
>@yabapmatt excellent for making these tools unique to the community.

@yabapmatt excelente por realizar estas herramientas unicas para la comunidad
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@nilima · 
amazing news and post,,,thanks for sharing
![](https://steemitimages.com/DQmXRb4BAVJE7S3GYXpCr6tSby73TF8ChHhSup9L7xmj6ik/image.png)
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@onlyprofitbot ·
re-yabapmatt-another-price-feed-publishing-tool-for-witnesses-20180214t192541696z
<div class="pull-right"><img src="https://image.ibb.co/gwwWo7/guaran.jpg" /></div>
<p>Thank you so much for using our service! We guarantee your bids never be in negative ROI again.</p>
Help us grow by delegating to us!  <a href="https://steemconnect.com/sign/delegateVestingShares?delegator=username&delegatee=onlyprofitbot&vesting_shares=206940.794200%20VESTS">100sp</a>, <a href="https://steemconnect.com/sign/delegateVestingShares?delegator=username&delegatee=onlyprofitbot&vesting_shares=1034703.971000%20VESTS">500SP</a>, <a href="https://steemconnect.com/sign/delegateVestingShares?delegator=username&delegatee=onlyprofitbot&vesting_shares=2069407.942000%20VESTS">1000SP</a>
<p>You just received 100.00% upvote from @onlyprofitbot courtesy of @yabapmatt!</p>
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@mitsuko ·
re-yabapmatt-another-price-feed-publishing-tool-for-witnesses-20180215t144408326z
You got a 100.00% upvote from @mitsuko courtesy of @yabapmatt!
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@samuel-swinton · 
Thanks for being on top of this! You never lost my vote. In my opinion, we need more witnesses to have a bias percent as high as yours!
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@steemprojects · 
This post has been just added as new item to _[timeline of Witness Price Feed on Steem Projects](https://steemprojects.com/projects/p/witness-price-feed/)_.

If you want to be notified about new updates from this project, register on Steem Projects and add Witness Price Feed to your favorite projects.
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