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npm-gwsh-private

v1.3.0

Published

Quickly setup a local, private Wiseplat blockchain.

Downloads

3

Readme

gwsh-private

Quickly setup a local, private Wiseplat blockchain.

Features:

  • Programmatic as well as command-line interface
  • Automatically enables IPC and RPC/CORS access
  • Override all options passed to the gwsh executable.
  • Override genesis block attributes including mining difficulty.
  • Execute console commands against the running gwsh instance.
  • Auto-mine initial balance (optional)
  • Works with Mist wallet

Thanks to Ade Duke for original how-to.

## Requirements:

  • Node.js v4 or above (you can install it using nvm)
  • Gwsh

Installation

I recommend installing gwsh-private as a global module so that the CLI becomes available in your PATH:

$ npm install -g npm-gwsh-private

Usage

via command-line

Quickstart

$ gwsh-private

You should see something like:

gwsh is now running (pid: 2428).

Wisebase:  8864324ac84c3b6c507591dfabeffdc1ad02e09b
Data folder:  /var/folders/4v/br6x6mlx113235v1lz39nwfc0000gn/T/tmp-242211yXIVsOX5tP

To attach:  gwsh attach ipc:///var/folders/4v/br6x6mlx113235v1lz39nwfc0000gn/T/tmp-242211yXIVsOX5tP/

Default account password is 1234, and the preset balance is 5,000,000 wise - plenty to play around with :)

Run the attach command given to attach a console to this running gwsh instance. By default web3 RPC is also enabled.

Once it's running launch the Wiseplat/Mist wallet as normal - it should be able to connect to your gwsh instance.

Options

Usage: gwsh-private [options]

Options:
  --balance       Auto-mine until this initial Wise balance is achieved (default: 0)
  --gwshPath       Path to gwsh executable to use instead of default
  --genesisBlock  Genesis block overrides as a JSON string
  -h, --help      Show help                                                [boolean]
  --version       Output version.

All other options get passed onto the gwsh executable.

For example, you can customize network identity, port, etc:

$ gwsh-private --port 10023 --networkid 54234 --identity testnetwork

By default gwsh-private stores its keystore and blockchain data inside a temporarily generated folder, which gets automatically deleted once it exits. You can override this behaviour by providing a custom location using the datadir option:

$ gwsh-private --datadir /path/to/data/folder

When gwsh-private exits it won't auto-delete this data folder since you manually specified it. This allows you to re-use once created keys and accounts easily.

via API

var gwsh = require('npm-gwsh-private');

var inst = gwsh();

inst.start()
  .then(function() {
    // do some work
  });
  .then(function() {
    // stop it
    return inst.stop();
  });
  .catch(function(err) {
    console.error(err);  
  })

Same as for the CLI, you can customize it by passing options during construction:

var gwsh = require('npm-gwsh-private');

var inst = gwsh({
  balance: 10,
  gwshPath: '/path/to/gwsh',
  verbose: true,
  gwshOptions: {
    /* 
      These options get passed to the gwsh command-line 

      e.g.

      mine: true
      rpc: false,
      identity: 'testnetwork123'
    */
  },
  genesisBlock: {
    /* 
      Attribute overrides for the genesis block

      e.g.

      difficulty: '0x400'
    */    
  }
});

inst.start().then(...);

You can execute web3 commands against the running gwsh instance:

var inst = gwsh();

inst.start()
  .then(() => {
    return inst.consoleExec('web3.version.api');
  })
  .then((version) => {
    console.log(version);
  })
  ...

Mining

To start and stop mining:

var inst = gwsh();

inst.start()
  .then(() => {
    return inst.consoleExec('miner.start()');
  })
  ...
  .then(() => {
    return inst.consoleExec('miner.stop()');
  })
  ...

If your machine is mining too quickly and producing multiple blocks with the same number then you may want to increase the mining difficulty in the genesis block:

var inst = gwsh({
  genesisBlock: {
    difficulty: '0x10000000000'
  }
});

inst.start();
...

You can also do this via the CLI:

$ gwsh-private --genesisBlock '{"difficulty":"0x10000000"}'

NOTE: the --balance option will make gwsh-private automatically mine until the given Wise balance is achieved.

Development

To run the tests:

$ npm install
$ npm test

Contributions

Contributions are welcome. Please see CONTRIBUTING.md.

License

MIT