How To Model A Rubik’s Cube in Algorand’s TEAL
We’ve all played with one of these at some point in our lives. Maybe even managed to solve it or,
AlexGo Audit
Introduction CoinFabrik was asked to audit the contracts for the AlexGo project. First we will provide a summary of our
Market Making in Crypto Exchanges: An Introduction
Market makers at stock exchanges are companies or individuals who stand ready to buy and sell securities. Similarly, market makers
Smart Contract Auditing News
Every month several important smart contract audits are performed by blockchain security companies like us. It is important to stay up to date with the latest findings in order to learn and improve protection processes. Following we will describe three recent and interesting findings:
Æternity Grant Final Report
Two months before the AEternity Universe One Conference, CoinFabrik was asked to build the payments application that would be used in that conference. The app would be built on top of and focused on AEternity State-Channel technologies. It should include a mobile phone application allowing users to register as merchants or customers and perform payments.
Nahmii Security Audit
CoinFabrik was asked to audit the contracts for the Nahmii Token project. Firstly, we will provide a summary of our discoveries and secondly, we will show the details of our findings.
Censorship of Harmful Data in Blockchains
Public blockchains allow insertion of arbitrary data. Even specific-purpose blockchains like Bitcoin already contain a lot of non-financial data. Although this data insertion can be beneficial in some use cases (e.g. proof of existence), it can also cause damage. If a blockchain contained videos with instructions on how to torture someone, there would immediately be broad consensus that this data must be deleted. But since blockchains are supposed to be immutable databases, the question is: what can be done if this happens?
Immutability: Is There a Limit?
Any information stored in a blockchain is supposed to be preserved forever, nobody will be able to change it or even less erase it. But is this really true? Is there any chance that governments or private groups with enough money to finance costly attacks might delete information from a blockchain?
Libra Association: a Menace and an Opportunity for Blockchain Ecosystems
Facebook’s new permissioned blockchain initiative has been received with well-founded criticism, primarily related to concerns over privacy, but the battle that the Libra Association will spark around the world will probably benefit the struggle permissionless blockchains are facing.
How to Store Text in Ethereum
This is a step by step guide that shows how to publish a text in the Roptsten testnet of Ethereum. In order to publish in the Mainnet you will need to select it in the first step of the following tutorial.
Polkadot and Substrate: a Promising yet Challenging Blockchain Technology
If you’ve been following crypto news over the past few months, you have probably heard the words Polkadot and Substrate.
A Short Guide Through the Universe of Blockchain Based Micropayment Systems
Micropayment take place in pay-as-you-go software service models, micro donations, and the Internet of Things (IoT). In these contexts payments