Development of Ethereum smart contract project -- Web3.py library installation and error solution

1, Introduction to Web3.py Library web3.js is a set of JS libraries used to interact with local or remote Ethereum nodes. It can use HTTP or IPC to establish a connection with Ethereum nodes. web3.py is a python library that enables Python applications to interact with Ethereum blockchain. About web3 ...

Posted on Wed, 26 Feb 2020 06:16:36 -0500 by savagenoob

Fabric 2.0 blockchain installation guide

This article describes how to install the latest Hyperledger Fabric 2.0 precompiler, fabric samples sample configuration and code, and docker image. Hyperledger Fabric blockchain development tutorial: Development details of Fabric blockchain Node.js Java development details of Fabric blockchain Detailed explanation of Fabric blockchain Golang ...

Posted on Tue, 25 Feb 2020 08:02:59 -0500 by TKirahvi

Breakthrough Strategy for Day High and Low Points

Preface Previously, I heard a sentence: To make a lot of money, you must learn to hold a long-term position, but if you want to make fast money, you must learn to trade within days.Today, the range of quantitative transactions is amazing, and various trading strategies emerge one after another, the most popular of which is intraday trading str ...

Posted on Mon, 24 Feb 2020 22:08:43 -0500 by FirePhoenix

A cross period arbitrage strategy based on EG co integration in Python

Some background of Finance and Mathematics As we all know, the main premise of arbitrage transaction is the mean regression of the two prices with the same attributes, which is a kind of interest margin transaction to earn this mean regression. The classical regression model is based on the stationary data variables. For the non-stationary var ...

Posted on Mon, 24 Feb 2020 05:14:49 -0500 by mhsjrotc

Step by step analysis of Fabric 2.0 chain code operation

Hyperledger Fabric 2.0 has been released recently, and one of the most interesting points is chain code operation. Although the official document provides a detailed description of this, this article will help you better understand the differences between the chain code operation in the new version and some technical details behind the scenes b ...

Posted on Sun, 23 Feb 2020 23:18:20 -0500 by AbiusX

How super ledger Fabric uses third party CA

Hyperledger Fabric (HF) provides a fabric CA tool for end users to use their own ca. However, in the production environment, the security of the root CA should be guaranteed as much as possible. For example, the root CA should be taken offline, and the certificate issuing agent in the Hyperledger Fabric environment should be sent to the middle ...

Posted on Sat, 22 Feb 2020 22:14:09 -0500 by linux1880

Build Ethereum private chain (Windows)

The purpose of building private chain: public network main chain can be used in blockchain development, but it will cause unnecessary money waste. Doing anything on the Ethereum chain consumes gas. So for experimental development, we usually do experiments on our own private chain. Geth client download Download address on official website: ...

Posted on Sat, 22 Feb 2020 08:02:42 -0500 by a-mo

Using Python to realize a simple breakthrough strategy of commodity futures brin index

The breakthrough strategy of brin index is very simple. It is also very easy to write this strategy in Python language. With the back test configuration information, there are 70 lines of code, which can be more simplified in practice. In view of the teaching strategy, no difficult Python syntax is used, and basic statements and structures are ...

Posted on Sat, 22 Feb 2020 01:04:26 -0500 by EricC

Hand in hand to teach you to write a Python version of K-line synthesis function

When writing and using policies, we often use some uncommon K-line cycle data. However, exchanges and data sources did not provide data for these cycles. You can only synthesize by using data from an existing cycle. There is already a JavaScript version of the composition algorithm( link )In fact, it's easy to migrate a piece of JavaScript code ...

Posted on Fri, 21 Feb 2020 02:53:33 -0500 by suigion

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 ...

Posted on Fri, 21 Feb 2020 02:37:33 -0500 by nebb