# Steem Developer Portal

### Forum/Market Bandwidth

How to interpret raw bandwidth data.

### Intro

#### Please note, Bandwidth has been replaced by Resource Credits. This document is outdated and will remain in place to give historical context prior to HF20. Also see: RC Bandwidth System, 0.20.2 Release Notes, Developer Guide: Resource Credit System

We’re going over the various API calls needed to determine the remaining bandwidth available to a particular account. As mentioned in the STEEM Whitepaper:

> Bandwidth used by an individual user should be measured over a suitably long period of time to allow that user to time-shift their usage. Users tend to login, do many things at once, then logout. This means that their bandwidth over a short period of time may appear much higher than if viewed over a longer period of time. If the time window is stretched too far, then the reserve ratio will not adjust fast enough to respond to short-term surges; conversely, if the window is too short then clustering usage will have too big of an impact on normal users.

Bandwidth is specific to each account and depends on account activity.

### Sections

1. Getting Account Bandwidth
2. Dynamic Global Properties
3. Account STEEM Power
4. Calculate

### Getting Account Bandwidth

    curl -s --data '{
       "jsonrpc":"2.0",
       "method":"condenser_api.get_account_bandwidth",
       "params":[
          "cheetah",
          "forum"
       ],
       "id":1
    }' https://api.steemit.com

    {
       "jsonrpc":"2.0",
       "result":{
          "id":20846,
          "account":"cheetah",
          "type":"forum",
          "average_bandwidth":"7525646416619",
          "lifetime_bandwidth":"386010589000000",
          "last_bandwidth_update":"2018-07-18T16:37:54"
       },
       "id":1
    }

In this example, we got forum (blogging) average bandwidth of 7,525,646,416,619 with a lifetime bandwidth of 386,010,589,000,000.

Note, `average_bandwidth` is expressed as an integer with six decimal places represented. Divide by 1,000,000 in order to get the actual bytes of bandwidth, in this case: 7,525,646 bytes.

### Dynamic Global Properties

To do the calculation, we need `max_virtual_bandwidth` and `total_vesting_shares` from the global properties, e.g.:

    curl -s --data '{"jsonrpc":"2.0", "method":"condenser_api.get_dynamic_global_properties", "params":[], "id":1}' https://api.steemit.com

    {
       "id":1,
       "jsonrpc":"2.0",
       "result":{
          "head_block_number":24264289,
          "head_block_id":"01723e6156ad44ac7bf3028a53a7ac642084cb39",
          "time":"2018-07-17T20:25:27",
          "current_witness":"followbtcnews",
          "total_pow":514415,
          "num_pow_witnesses":172,
          "virtual_supply":"283443693.176 STEEM",
          "current_supply":"271786073.683 STEEM",
          "confidential_supply":"0.000 STEEM",
          "current_sbd_supply":"15504633.926 SBD",
          "confidential_sbd_supply":"0.000 SBD",
          "total_vesting_fund_steem":"193007548.472 STEEM",
          "total_vesting_shares":"391468555319.000697 VESTS",
          "total_reward_fund_steem":"0.000 STEEM",
          "total_reward_shares2":"0",
          "pending_rewarded_vesting_shares":"382967391.274340 VESTS",
          "pending_rewarded_vesting_steem":"187173.234 STEEM",
          "sbd_interest_rate":0,
          "sbd_print_rate":2966,
          "maximum_block_size":65536,
          "current_aslot":24341309,
          "recent_slots_filled":"340282366920938463463374607431768211455",
          "participation_count":128,
          "last_irreversible_block_num":24264271,
          "vote_power_reserve_rate":10,
          "average_block_size":13436,
          "current_reserve_ratio":200000000,
          "max_virtual_bandwidth":"264241152000000000000"
       }
    }

### Account STEEM Power

We also need to know how much the account has in STEEM Power from `vesting_shares` and `received_vesting_shares`:

    curl -s --data '{"jsonrpc":"2.0", "method":"condenser_api.get_accounts", "params":[["cheetah"]], "id":1}' https://api.steemit.com

    {
       "jsonrpc":"2.0",
       "result":[
          {
             "id":25796,
             "name":"cheetah",
             "owner":{
                "weight_threshold":1,
                "account_auths":[],
                "key_auths":[["STM7yFmwPSKUP7FCV7Ut9Aev5cwfDzJZixcreS1U3ha36XG47ZpqT", 1]]
             },
             "active":{
                "weight_threshold":1,
                "account_auths":[],
                "key_auths":[["STM7yFmwPSKUP7FCV7Ut9Aev5cwfDzJZixcreS1U3ha36XG47ZpqT", 1]]
             },
             "posting":{
                "weight_threshold":1,
                "account_auths":[["anyx", 100]],
                "key_auths":[["STM5bicRFWhpxnwBymo2HHJv6mFLiaP6AwVVsFEnnVjVcqbvqzvFt", 100], ["STM7yFmwPSKUP7FCV7Ut9Aev5cwfDzJZixcreS1U3ha36XG47ZpqT", 100], ["STM8Jn23vNmBzVuDAgQeZzzR17LmruENmmZmv1ra53tbsBgYbJFwk", 100]]
             },
             "memo_key":"STM7yFmwPSKUP7FCV7Ut9Aev5cwfDzJZixcreS1U3ha36XG47ZpqT",
             "json_metadata":"{\"profile\":{\"profile_image\":\"https:\/\/c1.staticflickr.com\/6\/5739\/22389343016_25d10c52a3_b.jpg\",\"about\":\"I am a robot that automatically finds similar content. Check the website linked to on my blog to learn more about me!\",\"website\":\"http:\/\/steemit.com\/steemit\/@cheetah\/faq-about-cheetah\"}}",
             "proxy":"",
             "last_owner_update":"1970-01-01T00:00:00",
             "last_account_update":"2017-06-13T00:14:00",
             "created":"2016-07-17T08:47:18",
             "mined":true,
             "recovery_account":"steem",
             "last_account_recovery":"1970-01-01T00:00:00",
             "reset_account":"null",
             "comment_count":0,
             "lifetime_vote_count":0,
             "post_count":517808,
             "can_vote":true,
             "voting_power":1249,
             "last_vote_time":"2018-07-18T16:39:21",
             "balance":"118.463 STEEM",
             "savings_balance":"0.000 STEEM",
             "sbd_balance":"67.717 SBD",
             "sbd_seconds":"127094582318",
             "sbd_seconds_last_update":"2018-07-18T14:13:15",
             "sbd_last_interest_payment":"2018-06-20T12:01:15",
             "savings_sbd_balance":"0.000 SBD",
             "savings_sbd_seconds":"0",
             "savings_sbd_seconds_last_update":"1970-01-01T00:00:00",
             "savings_sbd_last_interest_payment":"1970-01-01T00:00:00",
             "savings_withdraw_requests":0,
             "reward_sbd_balance":"0.005 SBD",
             "reward_steem_balance":"0.009 STEEM",
             "reward_vesting_balance":"26.366463 VESTS",
             "reward_vesting_steem":"0.013 STEEM",
             "vesting_shares":"4770940.577823 VESTS",
             "delegated_vesting_shares":"0.000000 VESTS",
             "received_vesting_shares":"16020356.484882 VESTS",
             "vesting_withdraw_rate":"347124.891306 VESTS",
             "next_vesting_withdrawal":"2018-07-21T02:27:09",
             "withdrawn":"1388499565224",
             "to_withdraw":"4512623586985",
             "withdraw_routes":1,
             "curation_rewards":170083,
             "posting_rewards":37433355,
             "proxied_vsf_votes":["50341599736964", "20169963876698", 0, 0],
             "witnesses_voted_for":23,
             "last_post":"2018-07-18T16:39:24",
             "last_root_post":"2018-07-18T07:00:45",
             "average_bandwidth":"7525467544963",
             "lifetime_bandwidth":"386011530000000",
             "last_bandwidth_update":"2018-07-18T16:39:24",
             "average_market_bandwidth":2406616155,
             "lifetime_market_bandwidth":"224370000000",
             "last_market_bandwidth_update":"2018-07-12T04:57:36",
             "vesting_balance":"0.000 STEEM",
             "reputation":"305786119478594",
             "transfer_history":[],
             "market_history":[],
             "post_history":[],
             "vote_history":[],
             "other_history":[],
             "witness_votes":[
                "anyx",
                "arcange",
                "ats-witness",
                "ausbitbank",
                "bitcoiner",
                "blockchained",
                "chitty",
                "drakos",
                "followbtcnews",
                "fubar-bdhr",
                "guiltyparties",
                "liondani",
                "lukestokes.mhth",
                "neoxian",
                "netuoso",
                "noisy.witness",
                "patrice",
                "pfunk",
                "pjau",
                "teamsteem",
                "thecryptodrive",
                "themarkymark",
                "timcliff"
             ],
             "tags_usage":[],
             "guest_bloggers":[]
          }
       ],
       "id":1
    }

### Calculate

Now, we can derive `bandwidth_allocated`:

`bandwidth_allocated = max_virtual_bandwidth * (vesting_shares + received_vesting_shares) / total_vesting_shares`

`bandwidth_allocated = bandwidth_allocated / 1000000`

In our example, `bandwidth_allocated = 14034118993`.

Now that we have both `bandwidth_allocated` and `average_bandwidth`, we can determine the percentages.

First, we need `average_bandwidth` on the same scale as `bandwidth_allocated`:

`average_bandwidth = average_bandwidth / 1000000`

Then we can get the percentages:

`bandwidth_used = 100 * average_bandwidth / bandwidth_allocated`

`bandwidth_remaining = 100 - (100 * average_bandwidth / bandwidth_allocated)`

We can see that `cheetah` has used `0.053 %` bandwidth and has `99.946 %` remaining as of `last_bandwidth_update`.