A Bitcoin Transaction is composed of the following: Version (4 Bytes) TxIn Count (1 ~ 9B) For each TxIn: Outpoint (36B) Script Length (1 ~ 9B) ScriptSig(?) Sequence (4B) TxOut Count (1 ~ 9B) For each TxOut: Value (8B) Script Length(1 ~ 9B)* Script (?)* LockTime (4B) Assuming a standard P2SH/P2PKH transaction is created,… Read More »
In previous post we added second signer node to our private blockchain Adding Signer Node to Private Ethereum Network This time we will remove first node from blockchain. Those two steps can be considered as blockchain migration from one server to another. It is quite simple, execute in geth console for both nodes command clique.propose(“0x2C80fc7FAE05Ec4daCC44465fa0a9989C3147bA1”, false)… Read More »
Last time topic was Adding Another Node to Private Ethereum Network now we will have look how to add Sealer in Proof of Authority chain. Sealer on a PoA is like a miner on PoW. You can start a sealer with geth –mine –unlock “0xa132432bf” with a genesis using the clique consensus. The initial sealers… Read More »
This article is a continuation of the article Private Proof-of-Authority Ethereum Network on Synology NAS Here we describe how to add another node to our private Ethereum development blockchain. Keep in mind that it is private and development platform, so for public node all security requirements may not be met. In previous article we already did… Read More »
Prerequisites : Visual Studio Code – https://code.visualstudio.com/ Solidity support for Visual Studio code – https://marketplace.visualstudio.com/items?itemName=JuanBlanco.solidity OpenZeppelin Contracts – https://github.com/OpenZeppelin/openzeppelin-contracts This article does not claim to be a complete and perfect solution, but this is how it worked for me and might be starting point for you. Install Visual Studio Code, install Solidity extenstion. Extract from… Read More »
1. Download Ubuntu installation image and create virtual machine on NAS I started with Ubuntu server version. How to install Ubuntu on Synology 2. Optional – install Xrdp Server (Remote Desktop) on Ubuntu 20.04 https://linuxize.com/post/how-to-install-xrdp-on-ubuntu-20-04/ As my main development computers are Windows-based I preferred to have remote desktop access to Ubuntu server. For some reasons… Read More »
With this short article we will start series of blockchain related topics. Mostly we cover questions for beginners, but eventually we will also look into more complex themes. So today we start with simple Ethereum address/account generator. First we create small Windows form application with button to generate address and two edit boxes to… Read More »