IOTA Flash Channel Java Wrapper

This wrapper allows the usage of iota.flash.js lib directly in Java. This is achieved by running the iota.flash.js script and all dependencies (modified build of iota.flash.js) in the V8 engine (using J2V8 bindings for V8).
If you have any ideas please submit a request (I am totally not a Java guy so…)

iota.flash.js coverage

Multisig

• composeAddress
• updateLeafToRoot
• getDigest

Transfer

• prepare
• compose
• close (needs testing)
• applyTransfers
• appliedSignatures
• getDiff (not used at the moment)
• sign

Installation

1. Clone repo
2. Update maven ressources
3. That’s it.
4. You can run a test transaction by running the main func in the Main Class.

Updating iota.flash.js

I will try to update the iota.flash.js as often as I can till it is automated.
To manually update the lib do the following:

1. clone js lib from the repo git clone git@github.com:iotaledger/iota.flash.js.git
2. inside the cloned project open the gulpfile.js and change dist task to this

    gulp.task('dist', () => {
      return gulp.src('lib/flash.js')
        .pipe(webpack({
          output: {
            filename: 'iota.flash.js',
            libraryTarget: 'umd',
            library: 'iotaFlash',
            umdNamedDefine: true
          }
        }))
        .pipe(gulp.dest(DEST))
    });

   By doing this we get a umd package which we can access from the global js context under the name `iotaFlash
3. Copy the file from dist/iota.flash.js of the js lib folder to this project under res/iota.flash.js
4. Add "use strict";to the start of the file you just coppied (If you don’t the V8 will complain).
5. That was it…

TODO

• write documentation
• add some testing
• add a way to update iota.flash.js from the repo without manual steps
• cleanup maven
• makte this project a easy to import lib