Introduction CoinFabrik was asked to audit the contracts for the Woonkly project. First we will provide a summary of our discoveries and then we will show the details of our findings. Summary The contracts audited are from the STAKESmartContractPreRelease repository and DEXsmartcontractsPreRelease repository at GitHub. The audit is based on the commit 779522de8afcf9285d660abdcc0fb10a62f6f659, and 49777cd67d0227c21437236ab9f42b501a864895 […]
The purpose of this document is to offer different alternatives to reduce gas cost in certain functions of the Money on Chain project. These functions when called in a transaction may reach the block gas limit, rendering them unable to be called.
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.
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?
The security of your crypto-assets depends on one piece of information that you must protect: your private key. If your private key is stolen, all your assets can be stolen. If your private key is lost, all your assets are lost.
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?
Æternity is a promising blockchain platform with great potential for many application scopes. One such great feature is the native support for state channels.
In this article we will explore how we built a peer-to-peer browser game to explore this Æternity capability; along examine related features of the platform such as ForgAE and companion tools and the Sophia functional contract development language
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.
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.
If you’ve been following crypto news over the past few months, you have probably heard the words Polkadot and Substrate. However, you might also be curious about what they are exactly, why they’ve been on the news so much and how relevant they are to your business. This article aims to give you a clearer […]
Micropayment take place in pay-as-you-go software service models, micro donations, and the Internet of Things (IoT). In these contexts payments for values which are usually under the smallest unit of fiat money (e.g. $0.001) are needed. Prepaid cards can solve this problem. Another approach uses cryptocurrencies in the blockchain, having the advantage of allowing exact […]
The purpose of this configuration is to generate a Docker environment of 2 nodes connected together running on Geth and monitor them using Ethstat (at localhost:3000). Then we can use MetaMask as well as Remix to connect to the first node (localhost:8545) to send simple transtractions, like sending Ether, or complex transactions like the creation or call of a smart contract.