Thoralf-M/curl.lib.js

IOTA Proof-of-Work algorithm ported to Javascript to work in WebGL2-enabled browsers

This is a fork of the official library to expose the curl object as a module not just as window.curl.

curl.lib.js

IOTA Proof-of-Work algorithm ported to Javascript to work in WebGL2-enabled browsers

build

npm install
npm run build

usage

An example of the usage of curl.lib.js:

var iota = core.composeAPI({
      provider: 'https://nodes.thetangle.org:443',
      attachToTangle: curl.localPoW
})

var curl = require('curl.lib.js');
var minWeight = 18;
curl.pow({trytes: myTryteString, minWeight})
    .then((nonce) =>{
        console.log(myTryteString.substr(0, 2187-81).concat(nonce));
    }).catch((error) => {
        /*
         woops. 
            maybe your trits were bad, 
            or your minWeightMagnitude was bad.
         Perhaps you need to take a long introspection,
         or just
         */
         console.log(error);
    });

Available functions:

• pow({trytes, minWeight})
  • gets the proof-of-work on a transaction
  • possible errors:
    • Webgl2 wasn't available
    • Transaction Trits were wrong length
    • Min Weight Magnitude was greater than Hash length (243)
• setOffset(offset<int >0>)
  • sets an offset to start pow search from
  • useful for amortized proof of work
• getHashCount()
  • returns the number of concurrent hash rows completed by this worker
• interrupt(void)
  • interrupts the currently running proof-of-work function
• resume(void)
  • continues the proof-of-work that you just interrupted
• remove(void)
  • removes the proof-of-work job that you had previously queued
• overrideAttachToTangle(iota)
  • overrides attachToTangle for iota.lib.js object

In Browser

Include dist/curl.min.js in your browser, and you'll find the curl object available in the window space.

To Do

---

• Improve speed
  • Find out some way to perform iterative loops on Fragment Shader when each step needs to know the output of the last from a separate index (i,e. hacked-together compute shader).