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 […]
CoinFabrik has been hired to audit the EasyPool smart contracts. We start this report writing a summary with the smart contracts provided by the client and a list of the analysis methods used to audit the contracts. Next, we will make a summary of the files we analysed and the public facing functions provided by the ProPool contract.
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.
CoinFabrik was asked to audit the contracts for the ArcadierX project. Firstly, we will provide a summary of our discoveries and secondly, we will show the details of our findings. The contracts audited are from the ArcadierX repository at https://github.com/arcadierx/arcadierx. The audit is based on the commit 985f836527544ea3878f21d2ee68c47e079ccdd4.
See our updated article: Algorand Block Explorer and CoinFabrik spin-off Randlabs. AlgoExplorer: A tool for retrieving human-readable data from the new Blockchain Algorand. As you probably know (or you should if you are in the crypto environment), there is a new blockchain right around the corner: Algorand. We are glad to have the opportunity to […]
After testing the performance of Ethereum using PoA, we tested the usability of the CardContact SmartCard-HSM USB token on an ethereum Proof of Authority network. The HSM allows to store and use multiple encryption keys, both RSA and Elliptic Curves (including secp256k1), for applications like issuing certificates as a CA, and with any application that […]
Lately, there has been a lot of talk about permissioned blockchains, in which only certain entities have the authority to validate transactions and generate blocks. The use of these technologies is currently highly required by different companies, since it allows them to store data in a decentralized way and show complete transparency in all their […]
Catalina Juarros – Ismael Bejarano – Pablo Yabo Overview The Dogethereum bridge project purports to solve a problem presented by the Dogecoin community in 2015 and for which Alex van de Sande started a bounty: to exchange Dogecoins and Ethereum ERC20 tokens back and forth on a one-to-one basis in a decentralized manner. Such an […]
CoinFabrik has been hired to audit the DMToken smart contract. First of all, we will describe what is the analysis performed by our team. Next, we will provide a summary of our discoveries and we will detail all our findings. And at the end, we will express our opinion in the conclusion.
The contract audited is at address 0x2ccbff3a042c68716ed2a2cb0c544a9f1d1935e1. The contract was deployed at transaction 0x111287826ad158a7ae11a9893f03e9e8998ed7b2bac061c83bed7b68e1958a6d.
Following our Smart Contract Auditing: Human vs. Machine article, we now analyze Slither, which is another static analysis tool from Trail of Bits. It includes aids for contract summaries, which can be helpful for making a mental model of the contract and rechecking assumptions. Considering the ease of use, it’s a good idea to try […]
In this blog post, we present a high-level overview of the paper describing the Ouroboros Proof of Stake protocol implemented in Cardano´s blockchain. After the overview follow some comments about theoretical aspects of the protocol.
In general, Proof of Stake (PoS) consensus protocols elect the network nodes responsible to send the next block to the blockchain on the basis of the nodes’ amount of stake.