Extending Pudding Classes

You can extend Pudding classes to add additional functionality. This is useful if you want to extend the functionality of a class without resorting to external methods:

// Persona is a contract class that has been created with Pudding.
Persona.extend({
  addAvatar: function(image) {
    // This method exists within a Persona contract class, so it already
    // has a reference to its own address at this.address. This method 
    // can then be used to seamlessly add this persona’s avatar to IPFS 
    // without interacting with functions external to the Persona object.

    // ... implementation ...
  }
});

// After calling .extend(), new instances of the Persona class will
// have the .addAvatar() function available.

var persona = Persona.at(“0x12345abcde...”);
persona.addAvatar(someImage);  // calls out to ipfs, saves hash on the blockchain

Note: Extended functions are not automatically promisified, so you'll have to promisify those functions yourself (or have those functions return a Promise) in order to use those functions within a promise chain.