Beauty of mybatis source code: 2.7. Analyze the plugins element to complete the configuration of mybatis plug-in

Parse the plugins element to complete the configuration of mybatis plug-in > Click to see the usage of the typeAliases element The plug-in mechanism of Mybtis is a very powerful function, which allows us to cut into the inside of Mybatis to perform some of the things we want to do during the operation of Mybatis. Page helper, a popular pagin ...

Posted by mistercoffee on Fri, 26 Jun 2020 20:44:20 -0700

Inside of Rust async/.await

In this tutorial, we will analyze the internal running mechanism of async/.await in detail. We will use the async STD library instead of tokio, because this is the first t rust library that supports async/.await syntax. The tutorial of async/.await principle analysis is divided into two parts, which is the first part. Blockchain development tu ...

Posted by Imad on Thu, 18 Jun 2020 20:06:38 -0700

Basic principle of Chainlink Oracle

Basic principles of ChainlinkIn this paper, we will briefly introduce the basic principle of Chainlink. If we use the shortest sentence to explain what Chainlink is, we can say that Chainlink is a decentralized Oracle project, so in order to understand the working principle of Chainlink, we should first understand what is a oracle. Prophecy mac ...

Posted by jeethau on Thu, 28 May 2020 02:43:42 -0700

Build your first blockchain network

Previous article: Build your first blockchain network (3) UTXO component UTXO is an important concept in bitcoin. In this section, we will implement a simple UTXO. We divide the components of UTXO into the following three points: UTXOId: identify the UTXO TxInput: transaction input, i.e. input address and amount of coin TxOutput: ...

Posted by tomtimms on Tue, 19 May 2020 05:33:23 -0700

Introduction to trading [basic zero tutorial] - Zhihu

Let's continue with the following simple policy example to learn how to operate multiple targets in a policy. def initialize(context): context.security = 'BTC/USDT.binance' context.myaccount = context.get_account('myaccount') def handle_data(context): current_pric ...

Posted by bla5e on Sun, 03 May 2020 00:09:49 -0700

Design mode of Solidity written by smart contract | FISCO BCOS hypertext blockchain special session (Part 4)

Preface With the development of blockchain technology, more and more enterprises and individuals begin to combine blockchain with their own business. The unique advantages of blockchain, such as transparent and tamper proof data, can bring convenience to business. But at the same time, there are some hidden dangers. The data is open and transp ...

Posted by little_webspinner on Sun, 19 Apr 2020 04:50:44 -0700

Quick learning - simple voting DApp

Simple voting DApp Next, we will start to make a DApp. Although it is a very simple voting application, it will contain a complete workflow and interaction page. The main steps to build this application are as follows: We first install an analog blockchain called ganache, which can let our program run in the development environment. Writ ...

Posted by bubbadawg on Fri, 17 Apr 2020 03:00:05 -0700

Fabrc 2.0 External Chain Code Development Tutorial

A new feature introduced in Hyperledger Fabric 2.0 is the ability to use external chain code launchers, which are ideal for using kubenetes or dowcker swarm to manage node and chain code containers in a unified manner.In this article, we will learn how to deploy chain codes in a K8s cluster using an external chain code launcher. 1. Prerequisite ...

Posted by Whetto on Thu, 12 Mar 2020 19:14:19 -0700

10. Crowdfunding contract realization

Article directory Introduction to ICO crowdfunding Crowdfunding contract initialization Crowdfunding contract realization Introduction to ICO crowdfunding ICO (initial crypto token offering, first token crowdfunding) is considered to be a new type of investment and financing mode generated by th ...

Posted by smartsley on Tue, 10 Mar 2020 23:18:43 -0700

Hyperledger Fabrica 2.0 MSP & BCCSP

This article is based on fabric v2.0.1 The initialization process of localmsp and bccsp is described with the example of peer node startup. I. BCCSP BCCSP is the abbreviation of Blockchain Cryptographic Service Provider, which is an abstract representation of commonly used block chain cryptography al ...

Posted by smbkgeo1983 on Mon, 09 Mar 2020 21:38:48 -0700