Fabric 2.0 advanced learning - custom network deployment

The previous article, "advanced learning of Fabric 2.0 - image deployment network (2)", introduced how to use the script provided by Fabric sample byfn.sh To start the first network. In order to understand the startup process of Fabric network, this section completes the custom startup of Fabric through binary executable program. In t ...

Posted on Mon, 22 Jun 2020 23:20:12 -0400 by jgp4

Python Version Commodity Futures Multivariate Average Line Strategy

Complete transplantation from "Multi-variety average strategy for CTP commodity futures" Since the Python version of the commodity futures strategy does not yet have a multi-variety strategy, the JavaScript version of the "CTP commodity futures multi-variety average strategy" has been transplanted.Provides some design ideas ...

Posted on Mon, 15 Jun 2020 22:13:13 -0400 by eldee

Junior sister learning java IO: using Selector to send good person card

brief introduction NIO has three treasures: Buffer,Channel and Selector. This article will introduce the last of NIO's three piece set of selectors, and help junior sister send a good person card on the basis of understanding the selectors. Let's start. Introduction to Selector Younger martial sister: elder martial brother F, my peach blossom ...

Posted on Sat, 13 Jun 2020 21:15:52 -0400 by waradmin

How to use private key signing contract to call naked transaction? [Web3.js]

Transaction signature is the only way to prove your identity to blockchain, which is also a basic concept to be clarified when using Ethereum's Web3 development library. In this tutorial, we will learn how to use Web3.js to complete the signing and submission of Ethereum smart contract call transactions, which is applicable to all Ethereum cont ...

Posted on Mon, 08 Jun 2020 22:25:54 -0400 by dcj1978

For four years in a row, it has become the "favorite language for developers". Have you ever understood this programming language?

fn main() { println!("hello rust");} With the launch of Facebook's Libra project, Rust became the biggest project in the history of Rust, but with the rise of global digital currency, the journey of Rust may be just beginning. Although you may not know much about Rust, in the eyes of developers, it's really delicious! For four years in a r ...

Posted on Sat, 30 May 2020 06:08:29 -0400 by ucffool

Introduction to zero knowledge proof contract and application development of Ethereum

In this tutorial, we will learn how to develop a zero knowledge identification DApp based on Ethereum, how to develop a zero knowledge circuit of circle, how to generate and verify a solid zero knowledge smart contract, and how to generate zero knowledge evidence under the chain using Javascript, and provide a complete source code download at t ...

Posted on Fri, 29 May 2020 06:04:06 -0400 by Toonster

Use of Ethereum smart contract NodeJS/Web3

1, Overview Running environment: Node.js, npm, Truffle, Solidity, etc root@keke:~/go-ethereum# node -v v8.9.4 root@keke:~/go-ethereum# npm -v 5.7.1 solidity installation # npm install -g solc --save Install the development framework Truffle4 of solidity # npm install -g truffle --save Install the development client and simulat ...

Posted on Sun, 10 May 2020 23:35:58 -0400 by turtlekid8

How to realize a market collector

The research strategy, design strategy and back test analysis in program trading and quantitative trading are inseparable from the support of market data. It's not realistic to collect all the data on the market. After all, the amount of data is too large. For the digital money market, the inventor supports limited backtesting data of exchanges ...

Posted on Thu, 30 Apr 2020 01:56:08 -0400 by Fender963

How to realize a market collector

The research strategy, design strategy and back test analysis in program trading and quantitative trading are inseparable from the support of market data. It's not realistic to collect all the data on the market. After all, the amount of data is too large. For the digital money market, the inventor supports limited backtesting data of exchanges ...

Posted on Thu, 30 Apr 2020 01:52:05 -0400 by rincewind456

Interpretation of the technical point of aelf | implementation scheme of dividend contract interface

Profit contract: unified dividend management planoutlineBecause the main chain of aelf adopts DPoS consensus mechanism, it is an important part of the governance model of aelf to obtain rights and interests by holding tokens or locking positions. This creates a requirement: to implement a standard process that can manage dividends uniformly, a ...

Posted on Wed, 22 Apr 2020 06:52:47 -0400 by auro