Self Organisation in Coin Selection

3 July 2018 Edsko de Vries 18 mins read

Self Organisation in Coin Selection

The term "self organisation" refers to the emergence of complex behaviour (typically in biological systems) from simple rules and random fluctuations. In this blog post we will see how we can take advantage of self organisation to design a simple yet effective coin selection algorithm. Coin selection is the process of selecting unspent outputs in a user's wallet to satisfy a…

IOHK make a visit to Google’s London offices

Googlers keen to talk Cardano and the future of cryptocurrency

28 June 2018 Jane Wild 57 mins read

IOHK make a visit to Google’s London offices

Cryptocurrency is one of the most discussed topics of the moment, and whatever people think about it, they all want to know what’s next for the technology. An audience that was no different was at Google, where Charles Hoskinson was invited to talk about Cardano and the future of cryptocurrencies. At the meeting, held at Google’s London headquarters last month, Googlers around…

A major brand refresh for Cardano *

How IOHK Creative redesigned the brand with form following function

7 June 2018 Richard Wild 9 mins read

A major brand refresh for Cardano *

In January, Charles Hoskinson messaged to say he’d come across an online video that he wanted us to check out. I took a look at the link he sent, and found that it was indeed eye catching. A cryptocurrency fan had studied Cardano, and had made an animation of its development history. The data visualisation showed each piece of Cardano code appear on the screen as a brightly…

Semi-Formal Development: The Cardano Wallet

4 June 2018 Edsko de Vries 17 mins read

Semi-Formal Development: The Cardano Wallet

Please note: this post originally appeared on the Well-Typed blog.

TL;DR: A combination of formal modelling and testing using QuickCheck is a powerful tool in the design and implementation of high assurance software. Consistency of the model can be checked by testing invariants, and the real implementation can be tested by comparing it against the model.

As part of our consulting work for IOHK, Well-Typed have been working with IOHK on the design and implementation of the new version of the Cardano cryptocurrency wallet. As a crucial component of this process, we have written a semi-formal specification of the wallet: a mathematical model of the wallet along with…

Vision for blockchain in Africa is becoming a reality

Ethiopia and Rwanda keen to realise promise of the technology

29 May 2018 John O'Connor 7 mins read

Vision for blockchain in Africa is becoming a reality - Input Output

The hope of bringing the benefits of blockchain to Africa has been around even longer than IOHK itself. Founder Charles Hoskinson talked about the promise of the technology driving financial inclusion on the continent in a TEDx speech in 2014. The vision encouraged me to join the Cardano project. This month, IOHK signed an MoU with the Ethiopian government to train and hire…