Pool Design/Theory

The nodejs-pool is built around a small series of core daemons that share access to a single LMDB table for tracking of shares, with MySQL being used to centralize configurations and ensure simple access from local/remote nodes. The core daemons follow:

api - Main API for the frontend to use and pull data from.  Expects to be hosted at  /
remoteShare - Main API for consuming shares from remote/local pools.  Expects to be hosted at /leafApi
pool - Where the miners connect to.
longRunner - Database share cleanup.
payments - Handles all payments to workers.
blockManager - Unlocks blocks and distributes payments into MySQL
worker - Does regular processing of statistics and sends status e-mails for non-active miners.

API listens on port 8001, remoteShare listens on 8000.

moneroocean.stream (The reference implementation) uses the following setup:

• https://moneroocean.stream is hosted on its own server, as the main website is a static frontend
• https://api.moneroocean.stream hosts api, remoteShare, longRunner, payments, blockManager, worker, as these must all be hosted with access to the same LMDB database.

Setup Instructions

Server Requirements

• Ubuntu 24.04 (confirmed working)
• 8 Gb Ram
• 2 CPU Cores
• 150 Gb SSD-Backed Storage - If you're doing a multi-server install, the leaf nodes do not need this much storage. They just need enough storage to hold the blockchain for your node. The pool comes configured to use up to 60Gb of storage for LMDB. Assuming you have the longRunner worker running, it should never get near this size, but be aware that it /can/ bloat readily if things error, so be ready for this!
• Notably, this happens to be approximately the size of a 4Gb linode instance, which is where the majority of automated deployment testing happened!

Pre-Deploy

• If you're planning on using e-mail, you'll want to setup an account at https://mailgun.com (It's free for 10k e-mails/month!), so you can notify miners. This also serves as the backend for password reset emails, along with other sorts of e-mails from the pool, including pool startup, pool Monerod daemon lags, etc so it's highly suggested!
• Pre-Generate the wallets, or don't, it's up to you! You'll need the addresses after the install is complete, so I'd suggest making sure you have them available. Information on suggested setups are found below.
• Run installer from root user and it will make new "user" for pool usage later.

Deployment via Installer

2. Run the deploy script as a ROOT USER. This is very important! This script will install the pool to new user "user"! Also. Go get a coffee, this sucker bootstraps the monero installation.
3. Once it's complete, change as config.json appropriate. It is pre-loaded for a local install of everything, running on 127.0.0.1. This will work perfectly fine if you're using a single node setup. You'll also want to set bind_ip to the external IP of the pool server, and hostname to the resolvable hostname for the pool server. pool_id is mostly used for multi-server installations to provide unique identifiers in the backend. You will also want to run: source ~/.bashrc This will activate NVM and get things working for the following pm2 steps.
4. You'll need to change the API endpoint for the frontend code in the moneroocean-gui/script.js -- This will usually be http(s)://api.<your server FQDN> unless you tweak nginx!
5. The default database directory /home/user/pool_db/ is already been created during startup. If you change the db_storage_path just make sure your user has write permissions for new path. Run: pm2 restart api to reload the API for usage.
6. Once you're happy with the settings, go ahead and add pool daemon on main/leaf pool node:

cd ~/nodejs-pool/
pm2 start init.js --name=pool --kill-timeout 10000 --log-date-format="YYYY-MM-DD HH:mm:ss:SSS Z" -- --module=pool
pm2 save
pm2 startup

Install Script that assumes you have free Cloudflare DNS setup for your web (moneroocean.stream) and API (api.moneroocean.stream) endpoints, CLoudflare API Token from from https://dash.cloudflare.com/profile/api-tokens with "Zone.Zone (Read), Zone.DNS (Edit)" permissions and email for certbot updates:

curl -L https://raw.githubusercontent.com/MoneroOcean/nodejs-pool/master/deployment/deploy.bash | bash -s -- -s moneroocean.stream api.moneroocean.stream "Cloudflare API Token" [email protected]

Leaf server install script (only for pool module that you need to add/start as shown above after install and updating config.json to connect to your main pool DB server):

curl -L https://raw.githubusercontent.com/MoneroOcean/nodejs-pool/master/deployment/leaf.bash | bash

Assumptions for the installer

The installer assumes that you will be running a single-node instance and using a clean Ubuntu 24.04 server install. The following system defaults are set:

• MySQL Username: pool
• MySQL Password: 98erhfiuehw987fh23d
• MySQL Host: 127.0.0.1
• MySQL root access is only permitted as the root user, the password is in /root/mysql_pass
• SSL Certificate is generated, self-signed, but is valid for Claymore Miners.
• The server installs and deploys Caddy as it's choice of web server!

The pool comes pre-configured with values for Monero (XMR), these may need to be changed depending on the exact requirements of your coin. Other coins will likely be added down the road, and most likely will have configuration.sqls provided to overwrite the base configurations for their needs, but can be configured within the frontend as well.

Wallet Setup

The pool is designed to have a dual-wallet design, one which is a fee wallet, one which is the live pool wallet. The fee wallet is the default target for all fees owed to the pool owner. PM2 can also manage your wallet daemon, and that is the suggested run state.

Manual Setup

Pretty similar to the above, you may wish to dig through a few other things for sanity sake, but the installer scripts should give you a good idea of what to expect from the ground up.

Manual SQL Configuration

Until the full frontend is released, the following SQL information needs to be updated by hand in order to bring your pool online, in module/item format. You can also edit the values in sample_config.sql, then import them into SQL directly via an update.

Nice to have:
general/mailgunKey
general/mailgunURL
general/emailFrom

SQL import command: ```mysql -u root --password=$(sudo cat /root/mysql_pass)```

The shareHost configuration is designed to be pointed at wherever the leafApi endpoint exists. For moneroocean.stream, we use https://api.moneroocean.stream/leafApi. If you're using the automated setup script, you can use: http://<your IP>/leafApi, as Caddy will proxy it. If you're just using localhost and a local pool server, http://localhost:8000/leafApi will do you quite nicely.

Additional ports can be added as desired, samples can be found at the end of base.sql. If you're not comfortable with the MySQL command line, I highly suggest MySQL Workbench or a similar piece of software (I use datagrip!). Your root MySQL password can be found in /root/mysql_pass

Pool Update Procedures

If upgrading the pool, please do a git pull to get the latest code within the pool's directory.

Pool Troubleshooting

API stopped updating!

This is likely due to LMDB's MDB_SIZE being hit, or due to LMDB locking up due to a reader staying open too long, possibly due to a software crash. The first step is to run:

mdb_stat -fear ~/pool_db/

This should give you output like:

Environment Info
  Map address: (nil)
  Map size: 51539607552
  Page size: 4096
  Max pages: 12582912
  Number of pages used: 12582904
  Last transaction ID: 74988258
  Max readers: 512
  Number of readers used: 24
Reader Table Status
    pid     thread     txnid
     25763 7f4f0937b740 74988258
Freelist Status
  Tree depth: 3
  Branch pages: 135
  Leaf pages: 29917
  Overflow pages: 35
  Entries: 591284
  Free pages: 12234698
Status of Main DB
  Tree depth: 1
  Branch pages: 0
  Leaf pages: 1
  Overflow pages: 0
  Entries: 3
Status of blocks
  Tree depth: 1
  Branch pages: 0
  Leaf pages: 1
  Overflow pages: 0
  Entries: 23
Status of cache
  Tree depth: 3
  Branch pages: 16
  Leaf pages: 178
  Overflow pages: 2013
  Entries: 556
Status of shares
  Tree depth: 2
  Branch pages: 1
  Leaf pages: 31
  Overflow pages: 0
  Entries: 4379344

The important thing to verify here is that the "Number of pages used" value is less than the "Max Pages" value, and that there are "Free pages" under "Freelist Status". If this is the case, them look at the "Reader Table Status" and look for the PID listed. Run:

ps fuax | grep <THE PID FROM ABOVE>

ex:
ps fuax | grep 25763

If the output is not blank, then one of your node processes is reading, this is fine. If there is no output given on one of them, then proceed forwards.

The second step is to run:

pm2 restart blockManager worker payments remoteShare longRunner api

This will restart all of your related daemons, and will clear any open reader connections, allowing LMDB to get back to a normal state.

If on the other hand, you have no "Free pages" and your Pages used is equal to the Max Pages, then you've run out of disk space for LMDB. You need to verify the cleaner is working. For reference, 4.3 million shares are stored within approximately 2-3 Gb of space, so if you're vastly exceeding this, then your cleaner (longRunner) is likely broken.

Installation/Configuration Assistance

If you need help installing the pool from scratch, please have your servers ready, which would be Ubuntu 16.04 servers, blank and clean, DNS records pointed. These need to be x86_64 boxes with AES-NI Available.

Installation assistance is 3 XMR, with a 1 XMR deposit, with remainder to be paid on completion. Configuration assistance is 2 XMR with a 1 XMR deposit, and includes debugging your pool configurations, ensuring that everything is running, and tuning for your uses/needs. altblockManager module source (that determines the most profitable coin to mine and trades them to main coin on exchanges, in particular Tradeogre, Xeggex, Binance, Coinex, Gate, Livecoin, Okex, Sevenseas) price is 20 XMR.

SSH access with a sudo-enabled user will be needed, preferably the user that is slated to run the pool.

Assistance is not available for frontend customization at this time.

For assistance, please contact MoneroOcean at [email protected].

Developer Donations

If you'd like to make a one time donation, the addresses are as follows:

• XMR - 89TxfrUmqJJcb1V124WsUzA78Xa3UYHt7Bg8RGMhXVeZYPN8cE5CZEk58Y1m23ZMLHN7wYeJ9da5n5MXharEjrm41hSnWHL
• AEON - WmsEg3RuUKCcEvFBtXcqRnGYfiqGJLP1FGBYiNMgrcdUjZ8iMcUn2tdcz59T89inWr9Vae4APBNf7Bg2DReFP5jr23SQqaDMT
• ETN - etnkQMp3Hmsay2p7uxokuHRKANrMDNASwQjDUgFb5L2sDM3jqUkYQPKBkooQFHVWBzEaZVzfzrXoETX6RbMEvg4R4csxfRHLo1
• SUMO - Sumoo1DGS7c9LEKZNipsiDEqRzaUB3ws7YHfUiiZpx9SQDhdYGEEbZjRET26ewuYEWAZ8uKrz6vpUZkEVY7mDCZyGnQhkLpxKmy
• GRFT - GACadqdXj5eNLnyNxvQ56wcmsmVCFLkHQKgtaQXNEE5zjMDJkWcMVju2aYtxbTnZgBboWYmHovuiH1Ahm4g2N5a7LuMQrpT
• MSR - 5hnMXUKArLDRue5tWsNpbmGLsLQibt23MEsV3VGwY6MGStYwfTqHkff4BgvziprTitbcDYYpFXw2rEgXeipsABTtEmcmnCK
• LTHN - iz53aMEaKJ25zB8xku3FQK5VVvmu2v6DENnbGHRmn659jfrGWBH1beqAzEVYaKhTyMZcxLJAdaCW3Kof1DwTiTbp1DSqLae3e
• WOW - Wo3yjV8UkwvbJDCB1Jy7vvXv3aaQu3K8YMG6tbY3Jo2KApfyf5RByZiBXy95bzmoR3AvPgNq6rHzm98LoHTkzjiA2dY7sqQMJ
• XMV - XvyVfpAYp3zSuvdtoHgnDzMUf7GAeiumeUgVC7RTq6SfgtzGEzy4dUgfEEfD5adk1kN4dfVZdT3zZdgSD2xmVBs627Vwt2C3Ey
• RYO - RYoLsi22qnoKYhnv1DwHBXcGe9QK6P9zmekwQnHdUAak7adFBK4i32wFTszivQ9wEPeugbXr2UD7tMd6ogf1dbHh76G5UszE7k1
• XLA - SvkpUizij25ZGRHGb1c8ZTAHp3VyNFU3NQuQR1PtMyCqdpoZpaYAGMfG99z5guuoktY13nrhEerqYNKXvoxD7cUM1xA6Z5rRY
• XHV - hvxyEmtbqs5TEk9U2tCxyfGx2dyGD1g8EBspdr3GivhPchkvnMHtpCR2fGLc5oEY42UGHVBMBANPge5QJ7BDXSMu1Ga2KFspQR
• TUBE - TubedBNkgkTbd2CBmLQSwW58baJNghD9xdmctiRXjrW3dE8xpUcoXimY4J5UMrnUBrUDmfQrbxRYRX9s5tQe7pWYNF2QiAdH1Fh
• LOKI - L6XqN6JDedz5Ub8KxpMYRCUoQCuyEA8EegEmeQsdP5FCNuXJavcrxPvLhpqY6emphGTYVrmAUVECsE9drafvY2hXUTJz6rW
• TRTL - TRTLv2x2bac17cngo1r2wt3CaxN8ckoWHe2TX7dc8zW8Fc9dpmxAvhVX4u4zPjpv9WeALm2koBLF36REVvsLmeufZZ1Yx6uWkYG
• XTNC - XtazhSxz1bbJLpT2JuiD2UWFUJYSFty5SVWuF6sy2w9v8pn69smkUxkTVCQc8NKCd6CBMNDGzgdPRYBKaHdbgZ5SNptVH1yPCTQ
• IRD - ir3DHyB8Ub1aAHEewMeUxQ7b7tQdWa7VL8M5oXDPohS3Me4nhwvALXM4mym2kWg9VsceT75dm6XWiWF1K4zu8RVQ1HJD8Z3R9
• ARQ - ar4Ha6ZQCkKRhkKQLfexv7VZQM2MhUmMmU9hmzswCPK4T3o2rbPKZM1GxEoYg4AFQsh57PsEets7sbpU958FAvxo2RkkTQ1gE
• XWP - fh4MCJrakhWGoS6Meqp6UxGE1GNfAjKaRdPjW36rTffDiqvEq2HWEKZhrbYRw7XJb3CXxkjL3tcYGTT39m5qgjvk1ap4bVu1R
• XEQ - Tvzp9tTmdGP9X8hCEw1Qzn18divQajJYTjR5HuUzHPKyLK5fzRt2X73FKBDzcnHMDJKdgsPhUDVrKHVcDJQVmLBg33NbkdjQb
• XTA - ipN5cNhm7RXAGACP4ZXki4afT3iJ1A6Ka5U4cswE6fBPDcv8JpivurBj3vu1bXwPyb8KZEGsFUYMmToFG4N9V9G72X4WpAQ8L
• DERO - dero1qygrgnz9gea2rqgwhdtpfpa3mvagt5uyq0g92nurwrpk6wnn7hdnzqgudsv6t
• CCX - ccx7dmnBBoRPuVcpKJSAVZKdSDo9rc7HVijFbhG34jsXL3qiqfRwu7A5ecem44s2rngDd8y8N4QnYK6WR3mXAcAZ5iXun9BQBx
• BLOC - abLoc5iUG4a6oAb2dqygxkS5M2uHWx16zHb9fUWMzpSEDwm6T7PSq2MLdHonWZ16CGfnJKRomq75aZyviTo6ZjHeYQMzNAEkjMg
• ZEPH - ZEPHYR2nic7ULkkmgZNX8a9i2tMbkxuCqjgWZYuee3awX7RhtmhoT98CwGEGrruWZVSKtA7Z7JC8m7oeYHtBD9cBEZzdEh9BSdq4q
• SAL - SaLvdWKnkz6MvVgxXr2TWSDSvESz6EBcz3wmMFch2sQuMYz2sUQGVNDYhkYaSuvkDr9GSYp5h6BeQHnGK8HzKhqGeZCZzG3AHS3
• RVN - RLVJv9rQNHzXS3Zn4JH8hfAHmm1LfECMxy
• XNA - Nb931jkFtFN7QWpu4FqSThaoKajYjS5iFZ
• CLORE - AdXPHtV8yb86a8QKsbs8gmUpRpcxufRn8n
• RTM - RUCyaEZxQu3Eure73XPQ57si813RYAMQKC
• KCN - kc1qchtxq2gw9dc4r58hcegd6n4jspew6j9mu3yz8q
• BTRM - Bfhtr2g56tg73TNZBRCu6fJUD39Kur6SGG
• ERG - 9fe533kUzAE57YfPP6o3nzsYMKN2W2uCxvg8KG8Vn5DDeJGetRw
• BTC - 3HRbMgcvbqHVW7P34MNGvF2Gh3DE26iHdw
• BCH - 18sKoDSjLCFW9kZrXuza1qzEERnKi7bx8S
• ETH - 0xfE23a61548FCCE159a541FAe9e16cEB92Da650ed
• ETC - 0x4480Ad73a113BEFf05B2079E38D90c9757Ecb063
• LTC - MGj8PU1PpTNDDqRHmuEqfDpH3gxp6cJrUU

Credits

Zone117x - Original node-cryptonote-pool from which, the stratum implementation has been borrowed.

Snipa - Original nodejs-pool from which, the original implementation has been borrowed.

Mesh00 - Frontend build in Angular JS XMRPoolUI

Wolf0/OhGodAGirl - Rebuild of node-multi-hashing with AES-NI node-multi-hashing