Coding Smart Contracts – Tutorial Part I

How to Write, Deploy and Test a Smart Contract

Natallia Martchouk, co-founder of trimplement, the fintech enabler
Natallia Martchouk, co-founder of trimplement, explains how to develop Ethereum smart contracts.

In this article, I will give you a smart contract tutorial. It will tell you how to quickly write, test and deploy Ethereum smart contracts. My motivation is to help people to make the first steps. There are several good tutorials which helped me to get started. But I missed kind of a “cookbook recipe” for the entire journey, starting with the installation of tools and frameworks and ending with deployment to Ethereum and usage out of an application.

And so, I decided to write down all the steps involved and hope that you will find it helpful!

I’m working on a Mac, but I’ll provide links to the documentation of all tools and frameworks so that you’ll be able to find fitting instructions for your personal environment.

Today we will: 

  • Setup an environment that  allows you to write production-ready smart contracts
  • Write a simple smart contract
  • Test security and style guide issues with solhint
  • Write unit tests with a Truffle framework
  • Deploy the contract on the Rinkeby testnet using MetaMask and Remix
  • Execute calls on the deployed smart contract
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CoreExchange Feature Checklist

As a vendor of licensable fintech software products we are often asked about our competitors and our USPs. Our customers want to know, what makes our products comparable and where we make a difference and have a special edge. In this article I would like to elaborate on the feature set of our white label cryptocurrency trading platform CoreExchange and compare it to a couple of other well-known and popular exchanges.

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A big predatory fish facing a school of small predatory fishes, symbolizing the system architectures monoliths and microservices, respectively.

Monoliths or Microservices? A Comparison

Which Architecture Fits Your Business Best?

It’s a question no company hosting their own app or software program can avoid: Microservices or monoliths? Which system architecture shall it be? 

Skimming through the world wide web of tech talk, you might notice a distinct tendency: The Monolith seems to have fallen out of favor in behalf of microservice SOAs. But there are counter voices, too. They point out that microservice architecture comes with its own set of problems.

But what are the specific advantages and disadvantages of microservices and monoliths? First and foremost it’s all…

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A number of signs displaying the words InsurTech, RegTech, WealthTech, PensionTech, and PropTech

Beyond FinTech — 5 *Techs That Shake Up Their Industries

FinTech does not always equal FinTech. The number of digital tools and technological advancements rejigging the financial sector would go beyond the scope of this article. If there is one thing that is true about most FinTech solutions, it’s their focus on “personal finance”. FinTech software often allows users to manage their finances on their own. He doesn’t need an intermediary anymore, such as a human advisor or a bank — although a robot advisor could still be thrown in.

Yet, when looking at the vast variety of technologies and software applications, one thing becomes clear: FinTech has quite a few peers running the show. They are *Techs in their very own right.

Let’s take a look at what we have:

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Using Spring and Quartz with JobStore properties

This article describes how to use the Spring Framework and Quartz together when using org.quartz.jobStore.useProperties=true, meaning that all Job data is stored in the database as properties instead of serialized Java objects.

Normally this is not possible, because the Spring class SimpleTriggerFactoryBean stores a reference to the JobDetail in the JobDataMap, which cannot be represented as a set of properties.

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