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 article we are benchmarking several auditing tools. The smart contract security audit is a critical phase in the development of smart contracts. The DAO hack was just one trip in the odyssey to secure Ethereum smart contracts and compatible blockchains like RSK and Cardano. It is important to highlight that back in 2016 […]
The crypto market is still inefficient. Cryptoassets have different rates on different exchanges. The big question is how we can profit from that inefficiency. One approach is making transactions between exchanges, but if we buy a cryptoasset on one exchange, by the time we can sell it on another, the price difference may no longer […]
In this article we review the main ideas presented in the last cryptoassets valuation Satis Group’s article published by Bloomberg. Satis Group is an ICO advisory firm which has helped model one of the first bitcoin valuation in 2014. According to their report, the cryptoassets ecosystem forecast is promising. Bitcoin and Monero cryptocurrencies are both expected […]
The second stage of the Dogethereum bridge was presented on September 5, 2018 at 10 am (PT) and live streamed. The bridge uses “superblocks” to move coins from Dogecoin to Ethereum and collateralization to move coins from Ethereum to Dogecoin. We are excited because this innovation can also be used to bridge other blockchain pairs. […]
At CoinFabrik we are organizing internal presentations in response to interesting work we are doing. As we have grown, scheduling time to share our projects and ideas has become essential. Recent presentations have included: Decentralized Blockchain Bridges Last year Oscar Guindzberg, TrueBit, and CoinFabrik partnered to create a decentralized trustless bridge between Dogecoin and Ethereum […]
This article aims to extend the analysis of Bitcoin using Metcalfe’s Law performed by Cryptolab Capital on this article. Here, we are going to summarize some ideas and apply them to other major networks. We are going to update the analysis with Bitcoin to review some points and then, we are going to extend the […]
Some people think that cryptoassets are bubbles without intrinsic value and this is mostly due to the fact that they don’t know how to analyze them. Cryptoassets can’t be analyzed with the same valuation frameworks used in stocks and other non-cryptoassets. However, the crypto-community has been generating some useful valuation models. In this article we are […]
In my last article, I’ve shown you how to make a Solidity ERC20 Token for the RSK Mainnet, how to import and use OpenZeppelin libraries and contracts, and how to use Truffle to deploy and interact with our contract.
Although we succeeded in our quest and accomplished our objectives using Truffle, eventually this suite might present failures when you are sending transactions, deploying or managing accounts. In our case, while following the previous article instructions, I’ve had problems managing newly created accounts in Truffle and sending transactions.
In the last article, we have seen how to build an RSK node in our computer, select the proper network for development, configure Truffle to connect and deploy our future contracts, add accounts to our node and obtain funds to use them to pay the gas.
You should have now your node in the selected network fully synced, and at least one account with funds configured in the truffle and RSK node config files for our deployments.
In this article, we’ll be discussing deployment and interaction of Smart-Contracts over the RSK network. Our contract will be an ERC20 Token, based on the OpenZeppelin libraries, and we will deploy it directly into the Mainnet.
It is important to have an estimate of risk for a portfolio when trading with financial assets. Two basic and commonly used risk measures are value-at-risk and expected shortfall. We will illustrate the two concepts with an example and provide the necessary R code to actually calculate the values of both measures. If we take […]
Security Smart Contract Auditing: Beware of Duplicated Storage in Solidity Smart Contract Development Solidity semantics are confusing for smart contract developers with experience in traditional programming languages. This semantics can lead to security issues like the one we found in a recent smart contract security audit we did. The following code caught our attention: In […]