[Steem Examples] Steem Price Rate History

Steem Examples] Steem Price Rate History
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I recently made a post about how I removed USD payout display from SteemLiberator Condenser and instead show the actual SBD and STEEM (SP) payouts. Due to the fact that it has been receiving such great support, I have decided to also release the microservice that I created to handle this function.

The reason a micro-service was created is because the application needs to keep a living history of all of the filled conversion requests to be able to properly estimate the STEEM rate at the time of payout. Instead of polluting the Condenser code base with these extra dependencies, I have created this micro-service example to keep things nice and sectioned off.

Here's the original post

Steem Price Rate History
This is a microservice application used to get the actual SBD/SP payout of a given post

Hosted at https://steemrate.steemliberator.com:9001
Getting Started
Clone the repo
git clone https://github.com/SteemDevs/steem-examples
Enter the app directory
cd steem-examples/javascript/steem-price-rate-history
Install dependencies
npm install
Start your MongoDB client
mongod --fork --logpath ./logs/mongodb.log
Configure database
config.js
Seed data from SteemData
npm run setupdb
Start the application
npm run start
Required Params
created
promoted
pending_payout_value
percent_steem_dollars
total_payout_value
curator_payout_value
author_rewards
max_accepted_payout
Example Object
{ created: '2018-01-23T00:42:03',
promoted: '0.000 SBD',
author_rewards: '0',
total_payout_value: '0.000 SBD',
max_accepted_payout: '1000000.000 SBD',
curator_payout_value: '0.000 SBD',
percent_steem_dollars: '10000',
pending_payout_value: '2.370 SBD',
total_pending_payout_value: '0.000 STEEM' }
Example Request
curl 'https://steemrate.steemliberator.com/?created=2018-01-23T00%3A42%3A03&promoted=0.000%20SBD&author_rewards=0&total_payout_value=0.000%20SBD&max_accepted_payout=1000000.000%20SBD&curator_payout_value=0.000%20SBD&percent_steem_dollars=10000&pending_payout_value=2.370%20SBD&total_pending_payout_value=0.000%20STEEM'
Example Response
{"payoutPending":true,"averageRate":0,"fallbackActive":true,"sbdPayout":1.185,"steemPayout":null,"curatorSteemPayout":0}
More Information
What Does Fallback Active Mean In The Response?
The STEEM Rate is calculated from a moving average over the payout period of the post. If you check the value of a newly created post, there likely will not be enough information to calculate this average. In this situation, the current median STEEM price is determined from the Steem API at that time.

How Is The STEEM Rate calculated?
The STEEM Rate is calculated by checking Filled Convert Requests that occured over the course of the payout period of the post. By viewing how much SBD went in and how much STEEM came out, we are able to get a very accurate estimate of the STEEM price.

Links
SteemLiberator Condenser
Steem Examples Github Repo
Steem Price Rate History Hosted App
Original Condenser Contribution