Establishment of Ethereum private network - initialization of blockchain through Genesis block

genesis block file example { "config": { "chainId": 15, "homesteadBlock": 0, "eip155Block": 0, "eip158Block": 0 }, "difficulty": "4", "gasLimit": "2100000", "alloc": { "7df9a875a174b3bc565e6424a0050ebc1b2d1d82": { "balance": "300000" }, "f41c74c9ae680c1aa78f42e5647a62f353b7bdde": { ...

Posted on Tue, 22 Oct 2019 13:11:47 -0700 by Dysan

Practical course of iota hardware integration

This tutorial is for the beginners of iota. We will learn how to develop a relay connected to raspberry pie based on the balance of the specified iota address to turn on or off the LED. Although the tutorial is simple, it is enough to demonstrate the powerful capabilities of iota. We will use a connected raspberry pie as the Internet of things ...

Posted on Fri, 18 Oct 2019 02:53:52 -0700 by Timsoft

Etaifang Source Code Mechanism: Mining

Chain customer, specially for developers, there are questions to answer! This article is from Block Chain Technology Community No reprinting without permission. miner.start()Miner means miner. The miner's job is to "dig". Mining is the process of encapsulating a series of newest transactions not encapsulated in blocks into a new block ...

Posted on Thu, 19 Sep 2019 23:23:02 -0700 by garethj

CSS_Common Layout

Links to the original text: https://www.mk2048.com/blog/blog.php?id=hb2kjickj&title=CSS_%E5%B8%B8%E8%A7%81%E5%B8%83%E5%B1%80 1. A column layout - often used on the home page of a website. html: 1 <div class="top"></div> ...

Posted on Fri, 06 Sep 2019 03:50:51 -0700 by dabas

Principle and Implementation Code of Exchange Matching Engine

Matching/Trading Engine (Matching/Trading Engine), as its name implies, is a software for matching transactions, which is widely used in finance, securities, encrypted currency transactions and other fields. The trading engine manages all Open Orders in the encrypted asset market and automatically executes transactions when a matching pair of o ...

Posted on Mon, 22 Jul 2019 07:50:04 -0700 by shan111

50 lines of code building block chains

Brief comment: Block chains are hot today. If you don't know what a block chain is, you can use these 50 lines of code to help you understand it. Block Chain In more general terms, it is a public database in which new data is stored in a container named Block and added to an immutable chain.For bitcoins and other encrypted currencies, the da ...

Posted on Mon, 10 Jun 2019 10:27:30 -0700 by tomprogers

Fabric-sdk-java Quick Start

In the superbook Fabric block chain, the chain code is accessed through the RPC protocol interface of the node.Java applications can access chain codes using the official Fabric-sdk-java development kit, which encapsulates the GRPC chain code access protocol for Fabric block chains, enabling developers to focus on business logic.This article wi ...

Posted on Tue, 07 May 2019 08:25:39 -0700 by elfeste

Installation of open-ethereum-pool pool source code analysis environment

Installation of open-ethereum-pool pool source code analysis environment Install Geth //Install parity cd /tmp/ wget d1h4xl4cr1h0mo.cloudfront.net/v1.8.11/x86_64-unknown-linux-gnu/parity_1.8.11_ubuntu_amd64.deb dpkg -i parity_1.8.11_ubuntu_amd64.deb //Install screen apt-get update apt-get -y install screen //Start parity screen p ...

Posted on Sat, 02 Feb 2019 19:15:16 -0800 by hardius

In-depth Analysis of CMD in Brotherly Block Chain Tutorial Ether Source Code Analysis (I)

cmd packet analysis There are 13 subpackages under cmd. In addition to util packages, each subpackage has a main function. The init method of each main function defines the commands supported by the main function, such as Under the get package: func init() { // Initialize the CLI app and start Geth app.Action = geth app.HideV ...

Posted on Wed, 30 Jan 2019 14:03:15 -0800 by Wave

core-vm-stack-memory Source Code Analysis

vm uses the object Stack in stack.go as the stack of virtual machines. Memory represents the memory objects used in the virtual machine. stack Simply, 1024 big.Int arrays are used as stack storage. structure // stack is an object for basic stack operations. Items popped to the stack are // expected to be changed and modified. stac ...

Posted on Sun, 27 Jan 2019 10:15:14 -0800 by lyasian