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Messages - zapata42

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1
Stakeholder Proposals / Re: [Witness Proposal] 1.6.129 - zapata42-witness
« on: October 07, 2018, 12:15:46 am »
Another thing mentioned in Telegram group by @pc:
> please make sure that you publish a CER that is not higher than the settlement price for assets in black swan state. "higher" as in more BTS per bitXYZ

If CER is too low, it's cheaper for people to pay fees in that asset than in BTS if there is some BTS in the fee pool, although not a big deal because there should not be much BTS in the fee pool.

I have updated the script to handle the case, see commit 1, 2.
The applyed formula is: If CER < asset global settlement price, then published CER is the asset global settlement price.

My feed for those assets will be impacted: BTC, SILVER, GOLD, SGD, CHF, AUD.


2
Stakeholder Proposals / Re: [Witness Proposal] 1.6.129 - zapata42-witness
« on: October 04, 2018, 10:16:52 pm »
@zapata42 USDT is now trading at around 0.991 USD. Data sources (direct trading pairs):
* https://www.kraken.com/charts
* https://bittrex.com/Market/Index?MarketName=USD-USDT

CoinMarketCap is reporting 0.9968 which seems a bit off. https://coinmarketcap.com/currencies/tether/

Perhaps your script need to be updated.

It was already possible to configure the script to retrieve USDT price from Bittrex.
However, the Kraken source was not implemented, so I just added it.

As an example witnesses can add this configuration to the script in order to use Bittrex+Kraken sources for USDT:
Code: [Select]
    usdt_price:
        klass: Composite
        aggregation_type: 'weighted_mean'
        exchanges:
            bittrex:
                klass: Bittrex
                quotes:
                    - USDT
                bases:
                    - USD
            kraken:
                klass: Kraken
                quotes:
                    - USDT
                bases:
                    - ZUSD
                aliases:
                    ZUSD: USD

I have updated my script to use those sources.

I would also like to take this opportunity to say that the PID formula implementation is also available if poeple want to practice with it.

I am also working on a tool to visualize witness pricefeeds over time: http://pricefeed-tracker.dex.trading/
(code is here)

3
Stakeholder Proposals / Re: [Witness Proposal] 1.6.129 - zapata42-witness
« on: September 07, 2018, 12:03:13 am »
As BSIP42 has been voted in, my feed price has been adjusted accordingly.

The current adjustment is the use the same formula as gdex-witness.

4
Thanks for your votes, I am an active witness since the begining of the week.

Some updates from the last two weeks:
  • my nodes have been updated to 2.0.180823.
  • my pricefeed configuration has been updated following Abit's comments.
  • I have published code to experiment with BSIP42. It currently implements all the algorithms publicly discussed.  I have not activated any of them in my feed as I wait for the end of the BSIP42 voting period. This should allow anyone to experiment their formulas easely (just add your algorithm there).
  • a first Dedicated 4c/8t 3Ghz CPU, 64go RAM, 1To SSD hard drive, 250Mpbs internet bandwith has been ordered. I will use it to setup ElasticSearch + OpenExplorer + Explorer API in the coming weeks.
  • I am helping Alfredo on the backend of open-explorer.io to improve performances and make it easier to install and maintain (see this, this, this and this PR.. and more to come)

I will be at BitFest, Friday and Saturday, ping me here or on Telegram if you want to have a chat there.

5
Following current various discussions on price feeds I spend a couple of days tuning mine.


Here is the algorithm I use:
  • Get BTC/USD, ETH/USD, USDT/USD from CoinMarketCap.com (fallback to worldcoinindex.com)
  • Get Fiat forex USD/CNY, USD/EUR, ... from CurrencyLayer (fallback to OpenExchangeRates)
  • Get BITCNY/CNY from MagicWallet (use last 1h data, and if not enough trades use last 24h data)
  • Get last price and daily volume of BTS/USDT, BTS/BTC, BTS/ETH if available from Centralized Exchanges: Aex, Binance, CoinEgg, CoinTiger, Huobi, Lbank, Poloniex, Zb
  • Get last price and daily volume from BTS/OPEN.BTC, BTS/GDEX.BTC on BitShares DEX (and consider xxx.BTC = BTC)
  • Get last price for BITCNY/BTC, BITCNY/ETH from CoinTiger
  • Get last price for BTS/BITCNY from BitShares DEX

With that I compute all possible routes using BTC, ETH, USDT or BITCNY as intermediate asset.
Then I use a weighted average using the BTS/{BTC,ETH,USDT,BITCNY} daily volume.

Here is a sample result of all the routes for USD/BTS and CNY/BTS at 17/08/2018 21:58 UTC:

Code: [Select]
+------+-------+--------------+-------+--------------------+------------------------------------------------------------------------------------+
| base | quote | price        | diff  | quote volume       | source                                                                             |
+------+-------+--------------+-------+--------------------+------------------------------------------------------------------------------------+
| CNY  | BTS   | 0.8008708826 | +1.58 | 31726149.140697803 | ['magicwallet - CNY:BITCNY', 'bitshares - BITCNY:BTS']                             |
| CNY  | BTS   | 0.7775048363 | -1.38 | 275814.57983       | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'gdex - BTC:BTS']       |
| CNY  | BTS   | 0.7767051983 | -1.48 | 6099695.41644055   | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'poloniex - BTC:BTS']   |
| CNY  | BTS   | 0.7776046832 | -1.37 | 6823092.1          | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'zb - BTC:BTS']         |
| CNY  | BTS   | 0.7826822718 | -0.73 | 1944911.60043      | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'openledger - BTC:BTS'] |
| CNY  | BTS   | 0.7897477292 | +0.17 | 8090672.0          | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'coinegg - BTC:BTS']    |
| CNY  | BTS   | 0.7821021076 | -0.80 | 719268.12          | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'cointiger - BTC:BTS']  |
| CNY  | BTS   | 0.7758057134 | -1.60 | 3068685.9901371617 | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'huobi - BTC:BTS']      |
| CNY  | BTS   | 0.7816523652 | -0.86 | 1648254.1922999984 | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'lbank - BTC:BTS']      |
| CNY  | BTS   | 0.7798533954 | -1.08 | 5457868.0          | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:BTC', 'binance - BTC:BTS']    |
| CNY  | BTS   | 0.7968423519 | +1.07 | 275814.57983       | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'gdex - BTC:BTS']           |
| CNY  | BTS   | 0.7960228259 | +0.97 | 6099695.41644055   | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'poloniex - BTC:BTS']       |
| CNY  | BTS   | 0.7969446821 | +1.08 | 6823092.1          | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'zb - BTC:BTS']             |
| CNY  | BTS   | 0.8021485567 | +1.74 | 1944911.60043      | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'openledger - BTC:BTS']     |
| CNY  | BTS   | 0.8093897408 | +2.66 | 8090672.0          | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'coinegg - BTC:BTS']        |
| CNY  | BTS   | 0.8015539631 | +1.67 | 719268.12          | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'cointiger - BTC:BTS']      |
| CNY  | BTS   | 0.7951009697 | +0.85 | 3068685.9901371617 | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'huobi - BTC:BTS']          |
| CNY  | BTS   | 0.8010930350 | +1.61 | 1648254.1922999984 | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'lbank - BTC:BTS']          |
| CNY  | BTS   | 0.7992493226 | +1.38 | 5457868.0          | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:BTC', 'binance - BTC:BTS']        |
| CNY  | BTS   | 0.7739653886 | -1.83 | 17591765.91406     | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:USDT', 'aex - USDT:BTS']      |
| CNY  | BTS   | 0.7767270849 | -1.48 | 15976040.0         | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:USDT', 'zb - USDT:BTS']       |
| CNY  | BTS   | 0.7794887812 | -1.13 | 10213236.688898135 | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:USDT', 'huobi - USDT:BTS']    |
| CNY  | BTS   | 0.7760030565 | -1.57 | 188647.0           | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:ETH', 'cointiger - ETH:BTS']  |
| CNY  | BTS   | 0.7760030565 | -1.57 | 1040797.2504070019 | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:ETH', 'huobi - ETH:BTS']      |
| CNY  | BTS   | 0.7778900585 | -1.33 | 4698376.790000004  | ['openexchangerates - CNY:USD', 'coinmarketcap - USD:ETH', 'lbank - ETH:BTS']      |
| CNY  | BTS   | 0.7930701250 | +0.59 | 188647.0           | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:ETH', 'cointiger - ETH:BTS']      |
| CNY  | BTS   | 0.7930701250 | +0.59 | 1040797.2504070019 | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:ETH', 'huobi - ETH:BTS']          |
| CNY  | BTS   | 0.7949986288 | +0.84 | 4698376.790000004  | ['magicwallet - CNY:BITCNY', 'cointiger - BITCNY:ETH', 'lbank - ETH:BTS']          |
| USD  | BTS   | 0.1130179495 | -0.27 | 275814.57983       | ['coinmarketcap - USD:BTC', 'gdex - BTC:BTS']                                      |
| USD  | BTS   | 0.1129017143 | -0.37 | 6099695.41644055   | ['coinmarketcap - USD:BTC', 'poloniex - BTC:BTS']                                  |
| USD  | BTS   | 0.1130324632 | -0.26 | 6823092.1          | ['coinmarketcap - USD:BTC', 'zb - BTC:BTS']                                        |
| USD  | BTS   | 0.1137705405 | +0.39 | 1944911.60043      | ['coinmarketcap - USD:BTC', 'openledger - BTC:BTS']                                |
| USD  | BTS   | 0.1147975740 | +1.30 | 8090672.0          | ['coinmarketcap - USD:BTC', 'coinegg - BTC:BTS']                                   |
| USD  | BTS   | 0.1136862080 | +0.32 | 719268.12          | ['coinmarketcap - USD:BTC', 'cointiger - BTC:BTS']                                 |
| USD  | BTS   | 0.1127709653 | -0.49 | 3068685.9901371617 | ['coinmarketcap - USD:BTC', 'huobi - BTC:BTS']                                     |
| USD  | BTS   | 0.1136208335 | +0.26 | 1648254.1922999984 | ['coinmarketcap - USD:BTC', 'lbank - BTC:BTS']                                     |
| USD  | BTS   | 0.1133593356 | +0.03 | 5457868.0          | ['coinmarketcap - USD:BTC', 'binance - BTC:BTS']                                   |
| USD  | BTS   | 0.1125034561 | -0.72 | 17591765.91406     | ['coinmarketcap - USD:USDT', 'aex - USDT:BTS']                                     |
| USD  | BTS   | 0.1129048957 | -0.37 | 15976040.0         | ['coinmarketcap - USD:USDT', 'zb - USDT:BTS']                                      |
| USD  | BTS   | 0.1133063354 | -0.02 | 10213236.688898135 | ['coinmarketcap - USD:USDT', 'huobi - USDT:BTS']                                   |
| USD  | BTS   | 0.1127996511 | -0.46 | 188647.0           | ['coinmarketcap - USD:ETH', 'cointiger - ETH:BTS']                                 |
| USD  | BTS   | 0.1127996511 | -0.46 | 1040797.2504070019 | ['coinmarketcap - USD:ETH', 'huobi - ETH:BTS']                                     |
| USD  | BTS   | 0.1130739453 | -0.22 | 4698376.790000004  | ['coinmarketcap - USD:ETH', 'lbank - ETH:BTS']                                     |
| USD  | BTS   | 0.1128235134 | -0.44 | 275814.57983       | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'gdex - BTC:BTS']         |
| USD  | BTS   | 0.1127074782 | -0.54 | 6099695.41644055   | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'poloniex - BTC:BTS']     |
| USD  | BTS   | 0.1128380022 | -0.43 | 6823092.1          | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'zb - BTC:BTS']           |
| USD  | BTS   | 0.1135748097 | +0.22 | 1944911.60043      | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'openledger - BTC:BTS']   |
| USD  | BTS   | 0.1146000762 | +1.13 | 8090672.0          | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'coinegg - BTC:BTS']      |
| USD  | BTS   | 0.1134906222 | +0.15 | 719268.12          | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'cointiger - BTC:BTS']    |
| USD  | BTS   | 0.1125769542 | -0.66 | 3068685.9901371617 | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'huobi - BTC:BTS']        |
| USD  | BTS   | 0.1134253602 | +0.09 | 1648254.1922999984 | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'lbank - BTC:BTS']        |
| USD  | BTS   | 0.1131643122 | -0.14 | 5457868.0          | ['coinmarketcap - USD:USDT', 'coinmarketcap - USDT:BTC', 'binance - BTC:BTS']      |
| USD  | BTS   | 0.1128514039 | -0.42 | 275814.57983       | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'gdex - BTC:BTS']           |
| USD  | BTS   | 0.1127353400 | -0.52 | 6099695.41644055   | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'poloniex - BTC:BTS']       |
| USD  | BTS   | 0.1128658963 | -0.40 | 6823092.1          | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'zb - BTC:BTS']             |
| USD  | BTS   | 0.1136028859 | +0.25 | 1944911.60043      | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'openledger - BTC:BTS']     |
| USD  | BTS   | 0.1146284059 | +1.15 | 8090672.0          | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'coinegg - BTC:BTS']        |
| USD  | BTS   | 0.1135186776 | +0.17 | 719268.12          | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'cointiger - BTC:BTS']      |
| USD  | BTS   | 0.1126047837 | -0.63 | 3068685.9901371617 | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'huobi - BTC:BTS']          |
| USD  | BTS   | 0.1134533995 | +0.11 | 1648254.1922999984 | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'lbank - BTC:BTS']          |
| USD  | BTS   | 0.1131922869 | -0.12 | 5457868.0          | ['coinmarketcap - USD:ETH', 'coinmarketcap - ETH:BTC', 'binance - BTC:BTS']        |
| USD  | BTS   | 0.1126973406 | -0.55 | 17591765.91406     | ['coinmarketcap - USD:BTC', 'coinmarketcap - BTC:USDT', 'aex - USDT:BTS']          |
| USD  | BTS   | 0.1130994721 | -0.20 | 15976040.0         | ['coinmarketcap - USD:BTC', 'coinmarketcap - BTC:USDT', 'zb - USDT:BTS']           |
| USD  | BTS   | 0.1135016035 | +0.16 | 10213236.688898135 | ['coinmarketcap - USD:BTC', 'coinmarketcap - BTC:USDT', 'huobi - USDT:BTS']        |
| USD  | BTS   | 0.1135893251 | +0.23 | 31726149.140697803 | ['coinmarketcap - USD:BTC', 'cointiger - BTC:BITCNY', 'bitshares - BITCNY:BTS']    |
| USD  | BTS   | 0.1139091655 | +0.52 | 31726149.140697803 | ['coinmarketcap - USD:ETH', 'cointiger - ETH:BITCNY', 'bitshares - BITCNY:BTS']    |
| USD  | BTS   | 0.1129661203 | -0.32 | 188647.0           | ['coinmarketcap - USD:BTC', 'coinmarketcap - BTC:ETH', 'cointiger - ETH:BTS']      |
| USD  | BTS   | 0.1129661203 | -0.32 | 1040797.2504070019 | ['coinmarketcap - USD:BTC', 'coinmarketcap - BTC:ETH', 'huobi - ETH:BTS']          |
| USD  | BTS   | 0.1132408193 | -0.07 | 4698376.790000004  | ['coinmarketcap - USD:BTC', 'coinmarketcap - BTC:ETH', 'lbank - ETH:BTS']          |
+------+-------+--------------+-------+--------------------+------------------------------------------------------------------------------------+

And the final results I get:

Code: [Select]
+--------+------------+--------------+--------------+---------------------+---------------------+---------------------+--------------+---------------------+--------+--------+-------------------------+-------------+
| symbol | collateral |  new price   |     cer      |         mean        |        median       |      wgt. avg.      | wgt. std (#) |      blockchain     |  mssr  |  mcr   |      my last price      | last update |
+--------+------------+--------------+--------------+---------------------+---------------------+---------------------+--------------+---------------------+--------+--------+-------------------------+-------------+
|  CNY   |    BTS     | 0.7884066494 | 0.9460879792 | 0.7880032477 (0.05) | 0.7862150005 (0.28) | 0.7884066494 (0.00) |  1.17 (28)   | 0.7728333333 (2.02) | 110.0% | 175.0% | -1.0000000000 (-178.84) | unknown ago |
|  USD   |    BTS     | 0.1133240311 | 0.1189902327 | 0.1132431633 (0.07) | 0.1130994721 (0.20) | 0.1133240311 (0.00) |  0.06 (41)   | 0.1123699660 (0.85) | 110.0% | 175.0% | -1.0000000000 (-111.33) | unknown ago |
+--------+------------+--------------+--------------+---------------------+---------------------+---------------------+--------------+---------------------+--------+--------+-------------------------+-------------+

I use xeroc's pricefeed script that I modified again to add:
  • Composite source to group multiple sources as one (to handle things like fallbacks);
  • Add CoinTiger, CoinEgg, Huobi and MagicWallet sources;
  • Change the way derived routes volumes are computed;
  • Better tracking of source for debug/audit purpose;
  • Various code refactoring and small enhancements.
All code is accessible at Zapata/bitshares-pricefeed.

Your comments are more than welcome, this is intended to be adjusted over time.

Currently my ideas to further improve are:
  • use the volume weighted average of the last X minutes trades instead of the last prices.
  • use the order book depth to weight prices instead of daily volume.
  • plot and track current active feeds and backup/test feeds over time. This will help shareholders to vote accurately.
  • make all the data used for all my feeds publicly available for auditing

I would be able to progress on that once voted. Since then I'm helping Alfredo on the open-explorer (see last PR).

6
Thanks for your votes so far.

Please submit your mainnet API node to https://github.com/bitshares/bitshares-ui/ .

My nodes will be available in the next UI release (see PR). You can already find them in the staging wallet.
Any feedback on the latency is welcome.

My testnet witness (witness.zapata) and API node (wss://testnet.dex.trading) have been updated (see release thread).
I missed one block in the deployment process as I switched my signing key back to my main witness node while it was my turn.
I will take care to avoid this case in the future.
(Note that I had a typo in my previous post, you should have read 597, instead of 579. I'm now at 598).

This week I also added Bitshares integration to EOSIO/demux-js. You can find out more information on Demux here.

7
General Discussion / Re: BitShares TESTNET Feature Release 2.0.20180803
« on: August 05, 2018, 02:04:42 pm »
My testnet witness (witness.zapata) and API node (wss://testnet.dex.trading) have been updated.

enable-standby-votes-tracking (see #987) has been added to the configurations and configured as recommended (false for witness, true for api).

Docker image (bitshares/bitshares-core:testnet) is working correctly and gracefull shutdown fix (#1077 #1115) have been succesfully tested.

8
Can you please provide a block producer for the testnet as well?
To get my votes, I usually look how well they perform on the testnet (block production only, no price feeds).

My testnet block producer is running since early may and active since 12/05/2018. The account is: witness-zapata.

I also consider that running a testnet block producer is a mandatory task for a witness. I always test my changes on testnet before applying them on mainnet. It was also required for some developments. I am trying to keep it as stable as the main one.

On testnet, I missed 579 blocks so far:
  • the first ~540 was because initially I didn't put the correct private/public key pair, and didn't notice that I was activated. To prevent the issue on mainnet I monitor the activation (see this commit)
  • then I missed ~20 to update the version and at that time I was not running a backup node;
  • 1 block missed for a non investigated issue (short network loss);
  • then I missed ~15 block during my chaos testing to validate the backup procedures: I switch signing key after 3 blocks, and I tested muliple cases.
Note that I have heavely updated the underlying servers and kubernetes cluster while running the witness without issues.

9
Stakeholder Proposals / [Witness Proposal] 1.6.129 - zapata42-witness
« on: July 30, 2018, 08:21:09 pm »
Hello,

dear Bitshares community, I want to propose my services as a Bitshares Witness.

Please vote for zapata42-witness.

Who am I?

I am a developer with 13 years of experience in finance sector, based in Paris (France). I have worked for BNP Paribas Corporate Investment Banking in the equity derivatives business for the past 10 years in projects as varied as price publication, position keeping or request for quotes, and as a developer, technical lead or architect. Java is my main programming language but I have good knowledge of Python, Javascript, and Ruby. See below for my full resume.

I came to know Bitshares about one year ago, and since then I closely followed it as I was impressed by the technology, the balanced economical model and the distributed governance. I started to contribute on my spare time as I could:

Now I want to be more involved in Bitshares, and as I am not a C++ nor a React programmer (yet?), I feel like witness role currently suit me best to help the community. You will found below my current setup, and what I plan to do once voted in.


My current setup:

    Hardware: 3 x VPS 4 cores CPU at 2.4ghz, 24GB RAM, 100GB SSD hard drive, 250Mpbs internet bandwith, Location: France.
    (I consider this a minimum, see below for my target plan)
   
    I run 2 witness mainnet nodes (account zapata42-witness) and 2 witness testnet node (witness-zapata).
    They are monitored through an improved version of @clockwork's telegram monitoring bot that handle automatic key switch and price feed monitoring.

    The price feed is ready, I already publish @nasdaq assets (see AMAZONCOM) and I use a stabilized version of @xeroc's pricefeed.

    Additionnaly I host some services:
        Mainnet API:         https://api.dex.trading  (max-ops-per-account = 100)
        Mainnet Seed:       seed.dex.trading:1776
        Testnet API:          https://testnet.dex.trading
        Wallet:                  https://wallet.dex.trading or https://bitshares.dex.trading (patched version that use my referral link as default)

    Services are served through multiple proxies (currently NGINX) that do rate limiting and SSL termination.
    For SSL certificate is issued by Let's encrypt and renewal is automated.
    Everything run on a private multi datacenter Kubernetes cluster (so fully Dockerized and resilient) and monitored through Prometheus/Grafana.
    The setup is automated and ready to scale, see my plan below.

My plan:

If I get voted as an active witness my focus will be on:
  • Providing a stable block producer
  • Providing a stable, accurate and auditable price feed of most Market Pegged Assets
  • Grow Bitshares infrastructure, community and software ecosystem
This means:
  • Upgrade the infrastructure. With the current witness pay (~30 witness / bts=0.2$ / 1bts per block) I aim to add:
                        6 x Dedicated 4c/8t 3Ghz CPU, 64go RAM, 1To SSD hard drive, 250Mpbs internet bandwith, Locations: france, germany, uk, canada, singapore, australia
  • Continuous improvements of the setup like: geo optimizations for latency (GeoDNS + regional vlan), premium wildcard SSL certificate, premium api acess, ...
  • Additional to classic API nodes, I will install and serve community tools like: Open-Explorer, Python API Backend, Elastic Search database with a data visualization tool like Kibana/Graphana, Bitshares HUG, and any future interesting project of the community;
  • Active participation (code contributions, code/issue/bsip review, testing) to community initiatives (core, ui, tools, documentation) as a developer;
  • Participate to meetups and hackathons to promote Bitshares;
  • Regularly run third party professional penetration testing on the setup;
  • if BTS price allow me to do it, hire other people to help me.

So why voting for zapata42-witness ?
  • Experienced software developer with professional experience in developing and running financial highly critical software;
  • Professional experience in price contribution in a main financial company;
  • Proven will and capacity to contribute on Bitshares related projects;
  • Full setup (witness, pricefeed + api) in place, and wide range of services in target;
  • Active investment in Bitshares ecosystem (infrastructure & time) planned;
  • Knowledgeable in blockchain internals;
  • Relations in French fintech and financial institutions;
  • Fresh blood.


Contact:
  Telegram: @Zapata_42
  LinkedIn profile

* Edit 20180901: Update seed port.

10
General Discussion / Re: Shares of Nasdaq&NYSE at Bitshares
« on: June 12, 2018, 10:25:41 pm »
Note tat I have created AMAZONCOM on testnet also, if others witness wants to contribute ('ALLOW WITNESSES TO PROVIDE FEEDS' has been enabled).

11
account zapata42-witness is added to the whitelist for publication of feeds by smart asset AMAZONCOM
As soon as you manage to publish the feeds for smart asset AMAZONCOM, I will add you to the white list of all smart assets
Please try...

I have the price of the stock in dollars and multiply it by the exchange rate bts/usd.
I take the course of bts from the purse of the bitshares. Those. from a usd / bts pair on the bitshares exchange.


I have started the publication for AMAZONCOM.

Sorry for the delay I found another issue in bitshares-pricefeed.

I think the spread is due to the different USD:BTS price we use.
I use the current bitUSD DEX feed (= bitUSD settlement price), you seems to use the DEX BTS/bitUSD orderbook. Currently there is a big spread between the two.
I feel like the bitUSD current feed it's more appropriate.
Your opinion is welcome.

12
I have updated xeroc's bitshares-pricefeed to be able to publish your assets (see this issue).

It currently support IEX, AlphaVantage, RobinHood and Google Finance as stock price sources.

When I try to publish using IEX for Stock/USD price and Bitshares DEX current feed for USD/BTS, I have a spread with your prices (see column blockchain):
Code: [Select]
6/10/2018 3:03:32 PM+--------------+------------+--------------+--------------+---------------------+---------------------+---------------------+--------------+----------------------+--------+--------+-------------------------+-------------+
6/10/2018 3:03:32 PM|    symbol    | collateral |  new price   |     cer      |         mean        |        median       |      wgt. avg.      | wgt. std (#) |      blockchain      |  mssr  |  mcr   |      my last price      | last update |
6/10/2018 3:03:32 PM+--------------+------------+--------------+--------------+---------------------+---------------------+---------------------+--------------+----------------------+--------+--------+-------------------------+-------------+
6/10/2018 3:03:32 PM|   FORDCOM    |    BTS     | 0.0158990901 | 0.0166940447 | 0.0158990901 (0.00) | 0.0158990901 (0.00) | 0.0158990901 (0.00) |  0.00 ( 1)   | 0.0169090580 (-5.97) | 110.0% | 175.0% | -1.0000000000 (-101.59) | unknown ago |
6/10/2018 3:03:32 PM|   VISACOM    |    BTS     | 0.0014277794 | 0.0014991683 | 0.0014277794 (0.00) | 0.0014277794 (0.00) | 0.0014277794 (0.00) |  0.00 ( 1)   | 0.0015184220 (-5.97) | 110.0% | 175.0% | -1.0000000000 (-100.14) | unknown ago |
6/10/2018 3:03:32 PM| FACEBOOKCOM  |    BTS     | 0.0010173400 | 0.0010682070 | 0.0010173400 (0.00) | 0.0010173400 (0.00) | 0.0010173400 (0.00) |  0.00 ( 1)   | 0.0010817246 (-5.95) | 110.0% | 175.0% | -1.0000000000 (-100.10) | unknown ago |
6/10/2018 3:03:32 PM|  BOEINGCOM   |    BTS     | 0.0005206468 | 0.0005466791 | 0.0005206468 (0.00) | 0.0005206468 (0.00) | 0.0005206468 (0.00) |  0.00 ( 1)   | 0.0005539305 (-6.01) | 110.0% | 175.0% | -1.0000000000 (-100.05) | unknown ago |
6/10/2018 3:03:32 PM|   APPLECOM   |    BTS     | 0.0010035419 | 0.0010537190 | 0.0010035419 (0.00) | 0.0010035419 (0.00) | 0.0010035419 (0.00) |  0.00 ( 1)   | 0.0010670597 (-5.95) | 110.0% | 175.0% | -1.0000000000 (-100.10) | unknown ago |
6/10/2018 3:03:32 PM|   EBAYCOM    |    BTS     | 0.0047748571 | 0.0050135999 | 0.0047748571 (0.00) | 0.0047748571 (0.00) | 0.0047748571 (0.00) |  0.00 ( 1)   | 0.0050776123 (-5.96) | 110.0% | 175.0% | -1.0000000000 (-100.48) | unknown ago |
6/10/2018 3:03:32 PM|  ALIBABACOM  |    BTS     | 0.0009381138 | 0.0009850195 | 0.0009381138 (0.00) | 0.0009381138 (0.00) | 0.0009381138 (0.00) |  0.00 ( 1)   | 0.0008983187 (4.43)  | 110.0% | 175.0% | -1.0000000000 (-100.09) | unknown ago |
6/10/2018 3:03:32 PM|   TESLACOM   |    BTS     | 0.0006056129 | 0.0006358935 | 0.0006056129 (0.00) | 0.0006056129 (0.00) | 0.0006056129 (0.00) |  0.00 ( 1)   | 0.0006353301 (-4.68) | 110.0% | 175.0% | -1.0000000000 (-100.06) | unknown ago |
6/10/2018 3:03:32 PM|  AMAZONCOM   |    BTS     | 0.0001142400 | 0.0001199520 | 0.0001142400 (0.00) | 0.0001142400 (0.00) | 0.0001142400 (0.00) |  0.00 ( 1)   | 0.0001214706 (-5.95) | 110.0% | 175.0% | -1.0000000000 (-100.01) | unknown ago |
6/10/2018 3:03:32 PM| MCDONALDSCOM |    BTS     | 0.0011389438 | 0.0011958909 | 0.0011389438 (0.00) | 0.0011389438 (0.00) | 0.0011389438 (0.00) |  0.00 ( 1)   | 0.0011912059 (-4.39) | 110.0% | 175.0% | -1.0000000000 (-100.11) | unknown ago |
6/10/2018 3:03:32 PM|  NETFLIXCOM  |    BTS     | 0.0005335413 | 0.0005602184 | 0.0005335413 (0.00) | 0.0005335413 (0.00) | 0.0005335413 (0.00) |  0.00 ( 1)   | 0.0005088366 (4.86)  | 110.0% | 175.0% | -1.0000000000 (-100.05) | unknown ago |
6/10/2018 3:03:32 PM|   BAIDUCOM   |    BTS     | 0.0007298418 | 0.0007663339 | 0.0007298418 (0.00) | 0.0007298418 (0.00) | 0.0007298418 (0.00) |  0.00 ( 1)   | 0.0007762339 (-5.98) | 110.0% | 175.0% | -1.0000000000 (-100.07) | unknown ago |
6/10/2018 3:03:32 PM| MICROSOFTCOM |    BTS     | 0.0018929351 | 0.0019875818 | 0.0018929351 (0.00) | 0.0018929351 (0.00) | 0.0018929351 (0.00) |  0.00 ( 1)   | 0.0020129587 (-5.96) | 110.0% | 175.0% | -1.0000000000 (-100.19) | unknown ago |
6/10/2018 3:03:32 PM| STARBUCKSCOM |    BTS     | 0.0033989221 | 0.0035688682 | 0.0033989221 (0.00) | 0.0033989221 (0.00) | 0.0033989221 (0.00) |  0.00 ( 1)   | 0.0036148342 (-5.97) | 110.0% | 175.0% | -1.0000000000 (-100.34) | unknown ago |
6/10/2018 3:03:32 PM|   CISCOCOM   |    BTS     | 0.0044245398 | 0.0046457668 | 0.0044245398 (0.00) | 0.0044245398 (0.00) | 0.0044245398 (0.00) |  0.00 ( 1)   | 0.0047064385 (-5.99) | 110.0% | 175.0% | -1.0000000000 (-100.44) | unknown ago |
6/10/2018 3:03:32 PM+--------------+------------+--------------+--------------+---------------------+---------------------+---------------------+--------------+----------------------+--------+--------+-------------------------+-------------+

Any idea why there is such a spread? As JohnR asked, could you give us some insights on your pricing mechanism?

I can setup a price feed if you white-list zapata42-witness.

The code is under MIT license so any one can use it to setup their feed, I hope this will help decentralization.

13
Updated a few days ago, ready for the fork.
Sorry if I misses some blocks, I tested a (sucessfull) update from my phone, and I dont run multiple instances.
Thanks. Are you a mainnet witness? If yes, what's your witness name / ID?

I'm not (yet?) candidate on the mainnet.

14
Updated a few days ago, ready for the fork.
Sorry if I misses some blocks, I tested a (sucessfull) update from my phone, and I dont run multiple instances.

15
General Discussion / Re: Binance Dexathon - Discussion
« on: May 23, 2018, 09:09:01 am »
Any news?

For your information, the CEO talk about his expectations on this week epicenter.tv podcast: https://epicenter.tv/episode/235/

It seems they want to build something really similar to Bitshares (DAC included).
For them performances and liquidity are the highest priority.
They also say they will promote DEX in general, and try to bring liquidity.

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