Frequently Asked Questions

Mining Instructions

How do I start mining on this pool?
  1. Download and install a suitable miner.
  2. If your mining software supports the Stratum protocol, simply configure it to point to http://mvis.ca:8090. If it doesn't, (and at this point, most don't) you'll need to run a Stratum Proxy, which will act as an interface between your mining software and this mining pool. Please see the next FAQ entry, How do I run a Stratum Proxy for detailed instructions.
  3. Once your miner is running, visit http://mvis.ca/miners.html and verify that your miner has been recognized by the mining pool. Or use the Miner Account search box at the top-right to quickly access your mining profile page. Verify that the mining pool is receiving your submitted shares.
How do I run a Stratum Proxy?
  1. Download the Stratum Proxy .zip file and extract it to a folder of your choice. If you are running Linux, please see the Readme for alternate instructions.
  2. Double-click StratumProxy.exe to start the program.
  3. Enter an ETH address in the text box provided. This is the ETH address you will receive payouts to from the pool. This address needs to match the ETH address set in your mining software.
  4. Once you have done that the proxy should start automatically, and you should see some output in the log window at the bottom.
  5. Start your mining software and point it to http://localhost:8080.
Where can I get support?
You can send me a PM at u/mining-visualizer, or post a question on the 0xBitcoin subreddit.

Stratum Protocol

What exactly is the Stratum protocol anyway? Why do I need it.

In order to understand the stratum protocol, it might be helpful to understand what came before it, which was the RPC protocol. RPC stands for Remote Procedure Call. In cryptocurrency circles it is often referred to as "getwork". It means the miner continuously queries the mining pool to see if any of the mining parameters have changed. Some mining operators configure their software to poll the mining pool multiple times per second. Obviously, with many miners, this is very inefficient and places a heavy load on the mining pool.

The Stratum protocol, on the other hand, avoids continuously polling the pool by establishing a persistent TCP connection with the mining pool. (It's like phoning someone and keeping the line open.) Once the link has been opened the mining pool sends the current mining parameters to the miner. The TCP link is kept open, and whenever the mining parameters change, the mining pool simply sends them down to the miner.

How does the Stratum Proxy work?

The Stratum Proxy is like an interpreter that speaks two different languages. When it starts it establishs a link to the mining pool at http://mvis.ca:8090 using the stratum protocol to obtain the relevant mining parameters. At the same time, it also configures itself as an RPC Server and begins listening for RPC requests from your mining software. It provides the necessary mining parameters to your miner when asked, and receives share submissions from your miner and passes them up to the pool. Your mining software will think it is connected directly to the mining pool.

Where can I get technical specs on the stratum protocol as implemented by MVIS Token Pool?
Right here: Stratum Specification

Payout Scheme

What payout scheme does this mining pool use?

The basic idea is that you are awarded tokens on a regular basis, every 4 hours, regardless of whether the pool mines a block or not. This is in contrast to the Proportional payout scheme used by a lot of pools, where you only get tokens when the pool mines a block.

If the mining pool hits a run of bad luck and doesn't mine a block in a while, a portion of your rewards may be held back depending on the current pool balance, but it will be kept on your account and paid back later when the pool is having better luck.

What are some of the specific details of this payout scheme?
  • The pool starts with a balance of 150 tokens. You can always check the current pool balance on the Pool Info page
  • Tokens are awarded in rounds lasting 4 hours each.
  • At the end of each round the credits earned from your submitted shares are totaled and converted to a token reward using the formula: (totalCredits / networkDiff) * blockReward.
  • When your rewards meet the minimum threshold, you receive a payout, minus the pool fee and possibly a Mint Failure Fee.
  • In the event the pool runs into a bit of bad luck and the pool balance drops below 100 tokens, a proportional amount of your regular payouts will be held back and put in a special Holding account that you can see on your Miner Details page.
  • Later, when the pool has better luck and the pool balance gets above 150, your regular payouts will have an extra payback amount added to them to gradually reduce the Holding balance to zero.
  • You can expect your earnings to be about 20% better than predicted by the well known 0xBTC Mining Calculator, since it uses a 0.8 fudge factor .
What is a Holdback?

A holdback is when tokens that you are owed are transferred into a special holding account instead of being paid out to you. This happens when the pool balance runs low due to a spell of bad luck.

Remember that as a miner, your token rewards are calculated assuming that the mining pool will be able to mine blocks at a perfectly consistent rate, but of course it doesn't work that way in real life. The actual profit of the mining pool is subject to variance, or to put it more simply, luck. If the mining pool has a run of bad luck and doesn't mine as many blocks as expected, the pool token balance can run low. When this happens, a portion of your mining rewards will be held back and put in a special holding account. Later, when the pool has better luck, the tokens will be paid back to you.

Other

Does MVIS Token Pool support merge mining?
No. MVIS Token Pool is a proud, intentional supporter of pure 0xBitcoin mining! Please see my Reddit post for a more complete explanation.