Frequently Asked Questions (FAQ)

For instructions on how to connect see the help section. See also our guide on BlockCypher blog.
For instructions on how to request payout see our guide on BlockCypher blog.

Yes, you can. See the following instructions depending on which exchange you want to send grins to:

You can follow BitForex guide or simply follow these 3 steps:
  1. Login on BitForex and copy your BitForex UID.
  2. On your Grinmint dashboard, click the "Settings" tab, paste the https://grinproxy.bitforex.com/UID (where UID is the previous value) in the "wallet url", enter your password and click the update settings button.
  3. Finally, go to the "Payouts" tab and click the "Withdraw/Finalize" button. Go to the HTTP tab, enter your password and click the "Withdraw" button.
The easiest way is to request HTTPS payouts directly to your Poloniex account. You can follow Poloniex guide or simply follow these 5 steps:
  1. On your Poloniex account, go to "Deposits & Withdrawals".
  2. Search for GRIN and click on the "Deposit" button.
  3. Click "View Deposit Address" and copy the URL (it should be something like https://poloniex.com/public?currency=GRIN&command=createDeposit&id=xxxx)
  4. On your Grinmint dashboard, click the "Settings" tab, paste the previous URL in the "wallet url", enter your password and click the update settings button.
  5. Finally, go to the "Payouts" tab and click the "Withdraw/Finalize" button. Go to the HTTP tab, enter your password and click the "Withdraw" button.
Yes, you can mine with a CPU. However, it might take several hours to find a single share.
Yes, GPU mining is currently the most profitable way to mine Grin.
The block reward is 60 grins.
The Grin block time is set to one minute.
In order to receive grins directly in your wallet with HTTP payouts, you have to set a valid wallet IP or domain in your dashboard settings.
Make sure your wallet is reachable from the outside. In your grin-wallet.toml, you must have set the following value api_listen_interface = "0.0.0.0".
In order to receive grins in your wallet you need to do two things. First, you have to "receive" the transaction in your wallet with the 'grin wallet receive' command. Finally, upload the transaction in your dashboard by clicking the "Finalize Transaction" button. That's it!
Grin requires at least 24 hours (1440 blocks) before the coinbase is transferable.
You can learn more about Grin in the Grin Wiki.
By using a +randomvalue after your email, it is harder for someone to know your account. You don't need to create such specific email account. By default email sent, for example, on satoshi+1234@nakamoto.com lend on satoshi@nakamoto.com.
Your account was created without password. You can only request email payout. If you wish to create a regular account with the same email, simply add a wildcard in your email e.g. satoshi+randomvalue@nakamoto.com and don't forget to specify a password in Stratum!
Make sure you miner is submitting share. Also make sure that you selected the proper region in your dashboard (look at the top right dropdown).
We compute your hashrate based on the number of shares you submitted in the last 10 minutes. If you want to check your effective hashrate (hashrate based on the number of valid shares submitted) on Grinmint, you can do the following:
  • Take N, the number of shares submitted in the last hour.
  • Compute the following: GPS = D*42*N/3600, D is the pool difficulty. Currently 4.
  • Finally, most of the mining software are overestimating your hashrate.
    We pay the payouts on a first come first serve basis. Please be patient your payout will arrive.
    No, unfortunately EU and US are currently two different pool. If you mine in the US you won't get the reward for block found in EU and vice versa. We are working on merging them asap.
    PPLNG stands for Pay Per Last N Group. Everytime we find a block we:
  • Look at the shares submitted in the last hour.
  • Each share is assigned a share value based: a primary PoW (C31+) share is worth the graph weight of the share and a C29 share is worth the secondary scale of the block it was trying to solve.
  • We make a sum of this weights and we divide the block reward (including transaction fee) by it. This give us a base reward per share regardless of the PoW (C29 or C31).
  • We pay each user by multiplying this base reward per share with the number of shares of a type per block and the share value of this type of share. For example, if you mined 10 shares of C31 at block height 10 and 20 shares of C29 at block 11.
  • In definitive, C29 and C31 shares are not worth the same but their fluctuate based on the secondary scale. Read more about Grin PoW on BlockCypher blog.
    Grin is an experimental coin: use at your own risk! Grinmint does not guarantee any return on mining time or hashpower. You are strongly encouraged to move your rewards off the pool as often as possible into a wallet that you control. Although Grinmint takes multiple precautions to keep our users' coins safe, we do not offer any guarantee against hacks or loss. Grinmint is not a wallet. You, the user, assume the risk for any coins left on Grinmint. 60 days after coin maturity, your coins are considered expired and you will no longer be able to request payouts for them.