Zuchos

Introduction

There’s been a lot of buzz in the recent year around Ethereum cryptocurrency and not without cause. Smart contracts is a new exciting concept that Ethereum introduced. What is it? Ethereum is a distributed ledger (same as bitcoin) but this ledger may contain not only accounts and balances, but also computer programs. Programs are first class citizen on Ethereum blockchain and they are not only stored on it, but they provide functions that might be called (same as you may deposit or withdraw money on the ledger’s account) and store its state on the blockchain. For software developers it would be a good analogy that Ethereum Blockchain is a something similar to a VM. There is a virtual machine with instances of objects that are stored in its memory (smart contract). Instances contain not only code that might be executed but also its state. The main difference is that the everything is stored on distributed ledger instead of RAM. This metaphor is not perfect and simplifie

Zuchos

contract Petunia is owned {

  //constructor
  function Petunia(address _billingAddress)

  function getStatus(uint externalPaymentId) constant returns (string)

  function getPrice(uint externalPaymentId) constant returns(uint)

  function startNewPayment(uint externalPaymentId, uint price) onlyOwner

Zuchos

if (typeof web3 !== 'undefined' && typeof Web3 !== 'undefined') {
  web3 = new Web3(web3.currentProvider);
} else if (typeof Web3 !== 'undefined') {
  console.log('No web3? You should consider trying MetaMask!')
  web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'));
}

myApp.config(function ($provide) {
  $provide.provider('ethClinet', function () {
    this.$get = function () {

Zuchos

//create instance of it
val generator:StringIdGenerator = PrettyIdGenerator.singleNode

//generate ids
val stringId = generator.nextId()
stringId shouldNot be(empty)
stringId should fullyMatch regex """[A-Z]{4}-[0-9]{5}-[A-Z]{4}-[0-9]{5}"""

//or it might be used just for encoding existing ids
val prettifier = IdPrettifier.default

Zuchos

class IdPrettifier(
    encoder: Codec = new AlphabetCodec(Alphabet.Base23),
    partsSize: Int = 5,
    delimiter: Char = '-',
    leadingZeros: Boolean = true
)

Zuchos

prettifiedWithLeading.toIdSeed("AAAA-00000-AAAA-00013") should be(Right(1L))

Zuchos

prettifier.isValid("HPJD-72036-HAPK-58077") should be(true)

Zuchos

trait AcceptanceSpec
    extends FlatSpecLike
    with TestFutureHelpers
    with ScalaFutures
    with BeforeAndAfterAll
    with OptionValues
    with TryValues
    with EitherValues
    with Eventually
    with Matchers

Zuchos

import org.scalatest.{BeforeAndAfterEach, FlatSpecLike, Suite}

trait BaseSpec extends Suite with BeforeAndAfterEach {
  override protected def beforeEach(): Unit = {
    super.beforeEach()
    println("Before Each Base Spec")
  }
}
abstract class ExtendedBaseSpec(val name:String) extends BaseSpec {
  override protected def beforeEach(): Unit = {

Zuchos

trait AcceptanceSpec
  extends FlatSpecLike
    with BeforeAndAfterEach
    with Matchers
    with LazyLogging
    with AbstractPatienceConfiguration
abstract class StoreAcceptanceSpec
  extends TestKit(ActorSystem("StoreAcceptanceSpec"))
    with AcceptanceSpec