1.0.4 • Public • Published

    High performance Stratum poolserver in Node.js. One instance of this software can startup and manage multiple coin pools, each with their own daemon and stratum ports :)

    This software has been modefied for merged mining. It is still in development.


    This is a module for Node.js that will do nothing on its own. Unless you're a Node.js developer who would like to handle stratum authentication and raw share data then this module will not be of use to you.


    This server was built to be more efficient and easier to setup, maintain and scale than existing stratum poolservers which are written in python. Compared to the spaghetti state of the latest stratum-mining python server, this software should also have a lower barrier to entry for other developers to fork and add features or fix bugs.


    • Merged Mining Support
    • Daemon RPC interface
    • Stratum TCP socket server
    • Block template / job manager
    • P2P to get block notifications as peer node
    • Optimized generation transaction building
    • Connecting to multiple daemons for redundancy
    • Process share submissions
    • Session managing for purging DDoS/flood initiated zombie workers
    • Auto ban IPs that are flooding with invalid shares
    • POW (proof-of-work) & POS (proof-of-stake) support
    • Transaction messages support
    • Vardiff (variable difficulty / share limiter)
    • When started with a coin daemon that hasn't finished syncing to the network it shows the blockchain download progress and initializes once synced

    Hashing algorithms supported:

    • SHA256 (Bitcoin, Peercoin/PPCoin, Terracoin, etc..)(I've gotten reports Freicoin is not working)
    • Scrypt (Litecoin, Dogecoin, Feathercoin, etc..)
    • Scrypt-Jane (YaCoin, CopperBars, Pennies, Tickets, etc..)
    • Scrypt-N (Vertcoin [VTC])
    • Quark (Quarkcoin [QRK])
    • X11 (Darkcoin [DRK], Hirocoin, Limecoin)
    • X13 (MaruCoin, BoostCoin)
    • NIST5 (Talkcoin)
    • Keccak (Maxcoin [MAX], HelixCoin, CryptoMeth, Galleon, 365coin, Slothcoin, BitcointalkCoin)
    • Skein (Skeincoin [SKC])
    • Groestl (Groestlcoin [GRS])

    May be working (needs additional testing):

    • ? Blake (Blakecoin [BLC])
    • ? Fugue (Fuguecoin [FC])
    • ? Qubit (Qubitcoin [Q2C], Myriadcoin [MYR])
    • ? SHAvite-3 (INKcoin [INK])
    • ? Sha1 (Sha1coin [SHA], Yaycoin [YAY])

    Not working currently:

    • Groestl - for Myriadcoin
    • Keccak - for eCoin & Copperlark
    • Hefty1 (Heavycoin [HVC])


    • node v0.12+
    • coin daemon for primay and auxillery coins (preferably one with a relatively updated API and not some crapcoin :p)

    Example Usage

    Install as a node module by cloning repository

    git clone node_modules/stratum-pool
    npm update

    Module usage

    Create the configuration for your coin:

    Possible options for algorithm: sha256, scrypt, scrypt-jane, scrypt-n, quark, x11, keccak, blake, skein, groestl, fugue, shavite3, hefty1, qubit, or sha1.

    var myCoin = {
        "name": "Dogecoin",
        "symbol": "DOGE",
        "algorithm": "scrypt",
        "nValue": 1024, //optional - defaults to 1024
        "rValue": 1, //optional - defaults to 1
        "txMessages": false, //optional - defaults to false,
        /* Magic value only required for setting up p2p block notifications. It is found in the daemon
           source code as the pchMessageStart variable.
           For example, litecoin mainnet magic:
           And for litecoin testnet magic: */
         "peerMagic": "fbc0b6db" //optional
         "peerMagicTestnet": "fcc1b7dc" //optional

    If you are using the scrypt-jane algorithm there are additional configurations:

    var myCoin = {
        "name": "Freecoin",
        "symbol": "FEC",
        "algorithm": "scrypt-jane",
        "chainStartTime": 1375801200, //defaults to 1367991200 (YACoin) if not used
        "nMin": 6, //defaults to 4 if not used
        "nMax": 32 //defaults to 30 if not used

    If you are using the scrypt-n algorithm there is an additional configuration:

    var myCoin = {
        "name": "Execoin",
        "symbol": "EXE",
        "algorithm": "scrypt-n",
        /* This defaults to Vertcoin's timetable if not used. It is required for scrypt-n coins that
           have modified their N-factor timetable to be different than Vertcoin's. */
        "timeTable": {
            "2048": 1390959880,
            "4096": 1438295269,
            "8192": 1485630658,
            "16384": 1532966047,
            "32768": 1580301436,
            "65536": 1627636825,
            "131072": 1674972214,
            "262144": 1722307603

    If you are using the keccak algorithm there are additional configurations (The rare normalHashing keccak coins such as Copperlark and eCoin don't appear to work yet - only the popular ones like Maxcoin are):

    var myCoin = {
        "name": "eCoin",
        "symbol": "ECN",
        "algorithm": "keccak",
        /* This is not required and set to false by default. Some coins such as Copperlark and eCoin
           require it to be set to true. Maxcoin and most others are false. */
        "normalHashing": true

    Create and start new pool with configuration options and authentication function

    var Stratum = require('stratum-pool');
    var pool = Stratum.createPool({
        "coin": myCoin,
        "address": "mi4iBXbBsydtcc5yFmsff2zCFVX4XG7qJc", //Address to where block rewards are given
        /* Block rewards go to the configured pool wallet address to later be paid out to miners,
           except for a percentage that can go to, for examples, pool operator(s) as pool fees or
           or to donations address. Addresses or hashed public keys can be used. Here is an example
           of rewards going to the main pool op, a pool co-owner, and NOMP donation. */
        "rewardRecipients": {
            "n37vuNFkXfk15uFnGoVyHZ6PYQxppD3QqK": 1.5, //1.5% goes to pool op
            "mirj3LtZxbSTharhtXvotqtJXUY7ki5qfx": 0.5, //0.5% goes to a pool co-owner
            /* 0.1% donation to NOMP. This pubkey can accept any type of coin, please leave this in
               your config to help support NOMP development. */
            "22851477d63a085dbc2398c8430af1c09e7343f6": 0.1
        "blockRefreshInterval": 1000, //How often to poll RPC daemons for new blocks, in milliseconds
        /* Some miner apps will consider the pool dead/offline if it doesn't receive anything new jobs
           for around a minute, so every time we broadcast jobs, set a timeout to rebroadcast
           in this many seconds unless we find a new job. Set to zero or remove to disable this. */
        "jobRebroadcastTimeout": 55,
        //instanceId: 37, //Recommend not using this because a crypto-random one will be generated
        /* Some attackers will create thousands of workers that use up all available socket connections,
           usually the workers are zombies and don't submit shares after connecting. This features
           detects those and disconnects them. */
        "connectionTimeout": 600, //Remove workers that haven't been in contact for this many seconds
        /* Sometimes you want the block hashes even for shares that aren't block candidates. */
        "emitInvalidBlockHashes": false,
        /* Enable for client IP addresses to be detected when using a load balancer with TCP proxy
           protocol enabled, such as HAProxy with 'send-proxy' param:
        "tcpProxyProtocol": false,
        /* If a worker is submitting a high threshold of invalid shares we can temporarily ban their IP
           to reduce system/network load. Also useful to fight against flooding attacks. If running
           behind something like HAProxy be sure to enable 'tcpProxyProtocol', otherwise you'll end up
           banning your own IP address (and therefore all workers). */
        "banning": {
            "enabled": true,
            "time": 600, //How many seconds to ban worker for
            "invalidPercent": 50, //What percent of invalid shares triggers ban
            "checkThreshold": 500, //Check invalid percent when this many shares have been submitted
            "purgeInterval": 300 //Every this many seconds clear out the list of old bans
        /* Each pool can have as many ports for your miners to connect to as you wish. Each port can
           be configured to use its own pool difficulty and variable difficulty settings. varDiff is
           optional and will only be used for the ports you configure it for. */
        "ports": {
            "3032": { //A port for your miners to connect to
                "diff": 32, //the pool difficulty for this port
                /* Variable difficulty is a feature that will automatically adjust difficulty for
                   individual miners based on their hashrate in order to lower networking overhead */
                "varDiff": {
                    "minDiff": 8, //Minimum difficulty
                    "maxDiff": 512, //Network difficulty will be used if it is lower than this
                    "targetTime": 15, //Try to get 1 share per this many seconds
                    "retargetTime": 90, //Check to see if we should retarget every this many seconds
                    "variancePercent": 30 //Allow time to very this % from target without retargeting
            "3256": { //Another port for your miners to connect to, this port does not use varDiff
                "diff": 256 //The pool difficulty
        /* Recommended to have at least two daemon instances running in case one drops out-of-sync
           or offline. For redundancy, all instances will be polled for block/transaction updates
           and be used for submitting blocks. Creating a backup daemon involves spawning a daemon
           using the "-datadir=/backup" argument which creates a new daemon instance with it's own
           RPC config. For more info on this see:
              - */
        "daemons": [
            {   //Main daemon instance
                "host": "",
                "port": 19332,
                "user": "litecoinrpc",
                "password": "testnet"
            {   //Backup daemon instance
                "host": "",
                "port": 19344,
                "user": "litecoinrpc",
                "password": "testnet"
        /* This allows the pool to connect to the daemon as a node peer to receive block updates.
           It may be the most efficient way to get block updates (faster than polling, less
           intensive than blocknotify script). It requires the additional field "peerMagic" in
           the coin config. */
        "p2p": {
            "enabled": false,
            /* Host for daemon */
            "host": "",
            /* Port configured for daemon (this is the actual peer port not RPC port) */
            "port": 19333,
            /* If your coin daemon is new enough (i.e. not a shitcoin) then it will support a p2p
               feature that prevents the daemon from spamming our peer node with unnecessary
               transaction data. Assume its supported but if you have problems try disabling it. */
            "disableTransactions": true
    }, function(ip, port , workerName, password, callback){ //stratum authorization function
        console.log("Authorize " + workerName + ":" + password + "@" + ip);
            error: null,
            authorized: true,
            disconnect: false

    Listen to pool events

    'data' object contains:
        job: 4, //stratum work job ID
        ip: '', //ip address of client
        port: 3333, //port of the client
        worker: 'matt.worker1', //stratum worker name
        height: 443795, //block height
        blockReward: 5000000000, //the number of satoshis received as payment for solving this block
        difficulty: 64, //stratum worker difficulty
        shareDiff: 78, //actual difficulty of the share
        blockDiff: 3349, //block difficulty adjusted for share padding
        blockDiffActual: 3349 //actual difficulty for this block
        //AKA the block solution - set if block was found
        blockHash: '110c0447171ad819dd181216d5d80f41e9218e25d833a2789cb8ba289a52eee4',
        //Exists if "emitInvalidBlockHashes" is set to true
        blockHashInvalid: '110c0447171ad819dd181216d5d80f41e9218e25d833a2789cb8ba289a52eee4'
        //txHash is the coinbase transaction hash from the block
        txHash: '41bb22d6cc409f9c0bae2c39cecd2b3e3e1be213754f23d12c5d6d2003d59b1d,
        error: 'low share difficulty' //set if share is rejected for some reason
    pool.on('share', function(isValidShare, isValidBlock, data){
        if (isValidBlock)
            console.log('Block found');
        else if (isValidShare)
            console.log('Valid share submitted');
        else if (data.blockHash)
            console.log('We thought a block was found but it was rejected by the daemon');
            console.log('Invalid share submitted')
        console.log('share data: ' + JSON.stringify(data));
    'severity': can be 'debug', 'warning', 'error'
    'logKey':   can be 'system' or 'client' indicating if the error
                was caused by our system or a stratum client
    pool.on('log', function(severity, logKey, logText){
        console.log(severity + '' + '[' + logKey + '' + logText);

    Start pool



    • zone117x - Head developer of the original stratum mining pool for node.js
    • vekexasia - co-developer & great tester
    • LucasJones - got p2p block notify working and implemented additional hashing algos
    • TheSeven - answering an absurd amount of my questions, found the block 1-16 problem, provided example code for peer node functionality
    • pronooob - knowledgeable & helpful
    • Slush0 - stratum protocol, documentation and original python code
    • viperaus - scrypt adaptions to python code
    • ahmedbodi - more algo adaptions to python code
    • steveshit - ported X11 hashing algo from python to node module


    To support development of this project to the original author (zone117x), feel free to donate :)

    • BTC: 1KRotMnQpxu3sePQnsVLRy3EraRFYfJQFR
    • LTC: LKfavSDJmwiFdcgaP1bbu46hhyiWw5oFhE
    • VTC: VgW4uFTZcimMSvcnE4cwS3bjJ6P8bcTykN
    • MAX: mWexUXRCX5PWBmfh34p11wzS5WX2VWvTRT
    • QRK: QehPDAhzVQWPwDPQvmn7iT3PoFUGT7o8bC
    • DRK: XcQmhp8ANR7okWAuArcNFZ2bHSB81jpapQ
    • Cryptsy Trade Key: 254ca13444be14937b36c44ba29160bd8f02ff76


    Released under the GNU General Public License v2


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