sia.js

Nodejs Wrapper

A Highly Efficient Decentralized Storage Network

This is a Nodejs wrapper for Sia. Use it in your apps to easily interact with the Sia storage network via function calls instead of manual http requests.

Prerequisites

• node & npm (version 5.9.0+ recommended)

Installation

npm install sia.js

Example Usage

import { connect } from 'sia.js'
 
// Using promises...
// connect to an already running Sia daemon on localhost:9980 and print its version
connect('localhost:9980')
  .then((siad) => {
    siad.call('/daemon/version').then((version) => console.log(version))
  })
  .catch((err) => {
    console.error(err)
  })
 
// Or ES7 async/await
async function getVersion() {
  try {
    const siad = await connect('localhost:9980')
    const version = await siad.call('/daemon/version')
    console.log('Siad has version: ' + version)
  } catch (e) {
    console.error(e)
  }
}
 

You can also forgo using connect and use call directly by providing an API address as the first parameter:

import { call } from 'sia.js'
 
async function getVersion(address) {
  try {
    const version = await call(address, '/daemon/version')
    return version
  } catch (e) {
    console.error('error getting ' + address + ' version: ' + e.toString())
  }
}
 
console.log(getVersion('10.0.0.1:9980'))

sia.js can also launch a siad instance given a path on disk to the siad binary. launch takes an object defining the flags to use as its second argument, and returns the child_process object. You are responsible for keeping track of the state of this child_process object, and catching any errors launch may throw.

import { launch } from 'sia.js'
 
try {
  // Flags are passed in as an object in the second argument to `launch`.
  // if no flags are passed, the default flags will be used.
  const siadProcess = launch('/path/to/your/siad', {
    'modules': 'cghmrtw',
    'profile': true,
  })
  // siadProcess is a ChildProcess class.  See https://nodejs.org/api/child_process.html#child_process_class_childprocess for more information on what you can do with it.
  siadProcess.on('error', (err) => console.log('siad encountered an error ' + err))
} catch (e) {
  console.error('error launching siad: ' + e.toString())
}

The call object passed as the first argument into call() are funneled directly into the request library, so checkout their options to see how to access the full functionality of Sia's API

Siad.call({
  url: '/consensus/block',
  method: 'GET',
  qs: {
    height: 0
  }
})

Should log something like:

null { block:
 { parentid: '0000000000000000000000000000000000000000000000000000000000000000',
   nonce: [ 0, 0, 0, 0, 0, 0, 0, 0 ],
   timestamp: 1433600000,
   minerpayouts: null,
   transactions: [ [Object] ] } }