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.
Motivation These last years there has been growth in Smart Contracts development, predominantly in the Ethereum blockchain. Ethereum, being a different type of blockchain than Bitcoin, can execute concise lines of code inside its chain, a job that Bitcoin (specifically designed to send transactions easily) can’t do. Here is where RSK intervenes building a sidechain […]
We are compiling a list of recent developments in the sector of blockchain technology. Our focus is mostly on projects which promise scalability, but includes also proposals which aim to overcome some deficiencies in Bitcoin´s PoW based blockchain, e.g. which aim to improve fairness, usefulness, or privacy. You can find the current state of our work […]
Overview Our smart contract audit team found that Short Address Attack mitigations can cause several problems with smart contracts. A Short Address Attack is when a contract receives less data than it was expecting, and Solidity fills the missing bytes with zeros. The deployed smart contract cannot prevent this and will interpret those extra zeros as […]
We describe a geth source code change which enables faster block mining. We hope this option will be included in Ethereum command lines. Private Ethereum blockchains may be deployed by private entities to use in production or in the software development process. There are different ways of speeding the development environment. Some developers choose an […]
In the blockchain development industry lot of new technologies had arisen in the latest months. Unfortunately, most of the new platforms are not ready to use in production or directly they were built only to develop Demos. Our developers in Coinfabrik have been struggling to use them in the real world. Our customer asked to use Hyperledger but our initial […]
The challenge of modern cryptography is to find efficient but secure encryption schemes. The Elliptic Curve Integrated Encryption Scheme (ECIES) is a widely used encryption scheme which is specified in many standards. It is used for example in Ethereum’s Whisper. While Bitcoin Core does not implement ECIES, it can be employed to send secure messages […]
Elliptic curve cryptography is becoming more and more popular. One of its main supporters is the cryptocurrency system Bitcoin which uses an elliptic curve scheme for their digital signatures. Smaller key size, a more efficient implementation than the RSA system, and a similar level of security make elliptic curve cryptography an interesting alternative to RSA. […]
A private ethereum blockchain with multiple geth instances can be run over a network or on the same computer. We will explain how to do both, and also how to solve some common issues. Configuring genesis.json We need to create a JSON file, which will represent the genesis block of our private blockchain. This file […]
The Bitcoin community has been talking about multi-signature wallets for years. However, it is still very difficult for end users to use these wallets. Multi-signature wallets should allow copayers to communicate, but there is no standard protocol for seamless communication between copayers. The Bitcoin community should standardize the communication process. We’re going to learn to […]