Handshake CUDA miner
Last updated 2 years ago by chjj .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ cnpm install hs-miner 
SYNC missed versions from official npm registry.


CUDA-capable Cuckoo Cycle miner for Handshake.

This is a node.js module which hooks into John Tromp's many cuckoo cycle miners.


Tromp's code is not redistributed with this package, so the build process is a bit complex and involves cloning and preprocessing a bit of code.

make testnet


Simply point the miner at an HS RPC server and you're off.

$ hs-miner --rpc-host localhost --rpc-port 13037 --rpc-pass my-password

CLI Usage

Another small utility is available for mining arbitrary cuckoo cycle data. This is most useful for testing.

# Mine a single block
$ hs-mine [header-hex] [target] [backend] -n [nonce] -r [range]

API Usage

const miner = require('hs-miner');

// Header without the appended solution.
const hdr = Buffer.alloc(164, 0x00);

if (miner.hasCUDA())
  console.log('Mining with cuda support!');

console.log('CUDA devices:');

// This mutates the last 4 bytes of the
// buffer to increment a 32 bit nonce.
// The header size _must_ be a multiple
// of 4. This means the last 4 bytes of
// a handshake header's 20 byte nonce
// are used as the "regular nonce",
// whereas the first 16 bytes are the
// "extra nonces".
const [sol, nonce, match] = await miner.mineAsync(hdr, {
  backend: 'mean-cuda',
  nonce: 0,
  range: 0xffffffff,
  target: Buffer.alloc(32, 0xff),
  threads: 100,
  trims: 256,
  device: 0

if (!sol) {
  console.log('No solution found for nonce range!');
  // At this point we would increment the other 16
  // bytes of the header's nonce and try again.

if (!match) {
  console.log('A solution was found, but it did not meet the target.');

  const hash = miner.sha3(sol);
  const share = miner.toShare(hash);

  // Log the best share (note: we could submit
  // the solution+nonce to a mining pool!).
  console.log('Best share: %d (%d).', share, nonce);

  // Now we should try again by changing
  // the first 16 bytes of the header nonce.

console.log('Nonce: %d', nonce);
console.log('Match: %s', match);

If match is not true, this means there was a solution (possibly many), but they did not pass the target check. The returned solution and nonce will be the ones which amount to the lowest hash found. This is useful for submitting shares to a mining pool.

Note that threads is a percentage (1-100) of Tromp's default parameters when used with the mean-cuda backend. See Notes for more information.



  • miner.mine(hdr, options) - Mine a to-be-solved header (sync).
  • miner.mineAsync(hdr, options) - Mine a to-be-solved header (async).
  • miner.isRunning(device) - Test whether a device is currently running.
  • miner.stop(device) - Stop a running job.
  • miner.stopAll() - Stop all running jobs.
  • miner.verify(hdr, sol, target?) - Verify a to-be-solved header (sync).
  • miner.blake2b(data, enc) - Hash a piece of data with blake2b.
  • miner.sha3(data, enc) - Hash a piece of data with sha3.
  • miner.isCUDA(backend) - Test whether a backend is a CUDA backend.
  • miner.getEdgeBits() - Get number of edge bits (compile time flag).
  • miner.getProofSize() - Get proof size (compile time flag).
  • miner.getPerc() - Get easiness percentage (compile time flag).
  • miner.getEasiness() - Get easiness (compile time flag).
  • miner.getNetwork() - Get network (compile time flag).
  • miner.getBackends() - Get available backends.
  • miner.hasBackend(name) - Test whether a backend is supported.
  • miner.hasCUDA() - Test whether CUDA support was built.
  • miner.hasDevice() - Test whether a CUDA device is available.
  • miner.getDeviceCount() - Get count of CUDA devices.
  • miner.getDevices() - Get CUDA devices. Returns an array of objects.
  • miner.getCPUCount() - Get count of CPUs.
  • miner.getCPUs() - Get CPUs. Returns an array of objects.
  • miner.getBackend() - Get suggested backend based on the machine's hardware.


  • miner.toArray(buf) - Convert buffer solution to a uint32 array.
  • miner.toBuffer(arr) - Convert uint32 array solution to a buffer.
  • miner.toBits(target) - Convert a big endian target to a mantissa.
  • miner.toTarget(bits) - Convert mantissa to big endian target.
  • miner.toDouble(target) - Convert a big endian target to a double.
  • miner.toDifficulty(target) - Convert target/hash to a difficulty/share.
  • miner.toShare(hash) - Alias of toDifficulty.


  • miner.EDGE_BITS - Edge bits (compile time flag).
  • miner.PROOF_SIZE - Proof size (compile time flag).
  • miner.PERC - Easiness percentage (compile time flag).
  • miner.EASINESS - Easiness (compile time flag).
  • miner.NETWORK - Network (compile time flag).
  • miner.BACKENDS - Available backends.
  • miner.HAS_CUDA - Whether CUDA support was built.
  • miner.BACKEND - Default backend.
  • miner.TARGET - Default target.
  • miner.HDR_SIZE - Handshake to-be-solved header size (164).
  • miner.NONCE_SIZE - Total size of nonce (20).
  • miner.NONCE_START - Start of nonce position (144).
  • miner.NONCE_END - End of extra nonce position (160).


  • backend - Name of the desired backend.
  • nonce - 32 bit nonce, during mining, this will alter the last 4 bytes of the header (serialized as little endian), the front 16 bytes will stay unchanged.
  • range - How many iterations before the miner stops looking.
  • target - Big-endian target (32 bytes).
  • threads - Backend-specific, see below.
  • trims - Backend-specific, see below.

Backends (so far)

  • mean-cuda - Mean miner with CUDA (mean_miner.cu).
  • lean-cuda - Lean miner with CUDA (lean_miner.cu).
  • mean - Mean miner in C++ (mean_miner.cpp).
  • lean - Lean miner in C++ (lean_miner.cpp).
  • simple - Simple miner, mostly for testing (simple_miner.cpp).

Platform Support

The code has only been tested on Linux. Realistically, linux is the only thing that should matter for mining, but build support for other OSes is welcome via pull request.

Supports 64bit only right now.


  • Stratum support.
  • Improve speed of job stoppage.


When using one of the CUDA backends, only one job per device is allowed at a time. This is done because the CUDA miners generally wipe out your GPU's memory anyway.

The threads and trims parameters are backend-specific. You may have to dig into each one to figure out what reasonable values are and how they work.

For CUDA support, CUDA must be installed in either /opt/cuda or /usr/local/cuda when running the build scripts.

This can be modified with the CUDA_PREFIX environment variable:

$ CUDA_PREFIX=/path/to/cuda ./scripts/rebuild


NodeJS installation guide: https://nodejs.org/en/download/package-manager/

If you're on an OS without native NVIDIA packages, drivers can be installed from: https://www.nvidia.com/Download/Find.aspx

CUDA is available from NVIDIA's download page: https://developer.nvidia.com/cuda-downloads

Debian & Ubuntu

$ sudo apt-get install linux-headers-$(uname -r)
$ sudo apt-get install build-essential

# Install latest NVIDIA drivers
$ sudo add-apt-repository ppa:graphics-drivers/ppa
$ sudo apt update
$ sudo apt install nvidia-390

# Install CUDA
# Pick out your installation: https://developer.nvidia.com/cuda-downloads
$ wget http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1704/x86_64/cuda-repo-ubuntu1704_9.1.85-1_amd64.deb
$ sudo dpkg -i cuda-repo-ubuntu1704_9.1.85-1_amd64.deb
$ sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1704/x86_64/7fa2af80.pub
$ sudo apt-get update
$ sudo apt-get install cuda

# Install the latest node.js
$ curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
$ sudo apt-get install nodejs

# Install git & python
$ sudo apt-get install git python

$ npm install hs-miner

RHEL & Fedora

Follow this installation guide for nvidia drivers: https://www.if-not-true-then-false.com/2015/fedora-nvidia-guide/

This also looks promising: https://negativo17.org/nvidia-driver/

Install CUDA (RHEL)

# Pick out your installation: https://developer.nvidia.com/cuda-downloads
$ wget http://developer.download.nvidia.com/compute/cuda/repos/rhel7/x86_64/cuda-repo-rhel7-9.1.85-1.x86_64.rpm
$ sudo rpm -i cuda-repo-rhel7-9.1.85-1.x86_64.rpm
$ sudo yum clean all
$ sudo yum install cuda

Install CUDA (Fedora)

# Pick out your installation: https://developer.nvidia.com/cuda-downloads
$ wget http://developer.download.nvidia.com/compute/cuda/repos/fedora25/x86_64/cuda-repo-fedora25-9.1.85-1.x86_64.rpm
$ sudo rpm -i cuda-repo-fedora25-9.1.85-1.x86_64.rpm
$ sudo dnf clean all
$ sudo dnf install cuda

Install node.js & hs-miner (Both)

$ curl --silent --location https://rpm.nodesource.com/setup_9.x | sudo bash -
$ sudo yum install nodejs gcc-c++ make git python2
$ npm install hs-miner

Arch Linux

$ sudo pacman -S nodejs npm git nvidia nvidia-utils nvidia-settings cuda python2
$ npm install hs-miner


$ brew install node git coreutils perl grep gnu-sed gawk python2
$ brew tap caskroom/drivers
$ brew cask install nvidia-cuda
$ npm install hs-miner



Contribution and License Agreement

If you contribute code to this project, you are implicitly allowing your code to be distributed under the MIT license. You are also implicitly verifying that all code is your original work. </legalese>


  • Copyright (c) 2018, Christopher Jeffrey (MIT License).

See LICENSE for more info.

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