How to Convert VESTS to STEEM and vice versa?

On STEEM blockchain, the rewards are distributed in the unit of VESTS which can be converted to more human-readable unit of the SP – The Steem Power. The STEEM can be transferred from Steem accounts, the minimal amount of STEEM is 0.001.

Convert Vests to STEEM and Vice versa using Steem/Python

With Steem/Python library, through the steem.converter object, we can get the value of steem_per_mvests.

from steem.converter import Converter
from steem import Steem

def steem_to_vests(sp):
  steem = Steem()
  converter = Converter(steemd_instance = steem)
  return sp * 1e6 / converter.steem_per_mvests()

def vests_to_steem(vests):
  steem = Steem()
  converter = Converter(steemd_instance = steem)
  return converter.steem_per_mvests() * 1e6   

1e6 / steem_per_mvests() is the number of VESTS that is equal to 1 Steem Power. steem_per_mvests() (How many steem per million vests) can be also obtained via https://api.steemit.com at endpoint database_api.get_dynamic_global_properties.

PHP Function to Convert Vests to STEEM and Vice versa

As mentioned above, the conversion values can be queried via the https://api.steemit.com – through database_api.get_dynamic_global_properties. The PHP function is provided as belows:

<?php
function steem_per_mvests() {
    $url = 'https://api.steemit.com';
    $data = '{"jsonrpc":"2.0", "method":"database_api.get_dynamic_global_properties", "id":1}';
    $options = array(
      'http' =>
        array(
          'header' => "Content-Type: application/json\r\n".
                      "Content-Length: ".strlen($data)."\r\n".
                      "User-Agent:SteemYY.com/1.0\r\n",
          'method'  => 'POST',
          'content' => $data,
        )
    );
    $context  = stream_context_create($options);
    try {
        $result = file_get_contents($url, false, $context);
        $r = json_decode($result, true);
        $result = $r['result'];
    } catch (\Exception $e) {
        return false;
    }
    return $result['total_vesting_fund_steem']['amount'] / ($result['total_vesting_shares']['amount'] / 1e6);
}

function vests_to_sp($vests) {
    $steem_per_mvests = steem_per_mvests();
    if ($steem_per_mvests) {
        return $vests / 1e3 * $steem_per_mvests;
    } else {
        return false;
    }
} 

function sp_to_vests($sp) {
    $steem_per_mvests = steem_per_mvests();
    if ($steem_per_mvests) {
        return $sp * 1e6 / $steem_per_mvests;
    } else {
        return false;
    }
}

Free API of vests-to-steem and steem-to-vests

The above conversion has been implemented as a API that can be used freely subject to fair use policy.

For example:

curl -X GET -s "https://anothervps.com/api/steemit/vests/"

It will return JSON-encoded data:

{"sp_to_vests":2017.0314963280616,
"vests_to_sp":0.0004957780787362352,
"steem_per_mvests":0.4957780787362352}

The API server can be replaced with:

• West USA: steakovercooked.com
• East USA: helloacm.com
• London, UK: uploadbeta.com
• Tokyo, Japan: happyukgo.com

–EOF (The Ultimate Computing & Technology Blog) —