A course on blockchain was developed in the waiting room: "ETH principle and intelligent contract development", which was taught by Mr. Ma Liang. This collection records my study notes.

Course ***8 classes. Among them, the first four lessons talk about the ETH principle, and the last four lessons talk about smart contracts.

The first lesson is divided into four parts:

This article is the first part of the study notes: an introduction to Ethereum.

Ethereum is currently recognized as blockchain 2.0. Compared with blockchain 1.0 (bitcoin), its biggest feature is the introduction of smart contract, which changes from a single digital encryption token technology to a platform for distributed application of blockchain. Ethereum itself does not contain any specific applications, but mainly provides basic platforms and tools for developers to develop various applications based on it. It can be said that Ethereum has great potential, and it may eventually develop into the highest form of distribution, automation and self-organization.

First, we can learn the technology of Ethereum, understand the development of blockchain technology, and improve our thinking/path, so as to keep up with the frontier of blockchain technology development and predict the next trend.

Secondly, the development of DAPP (Distributed Application) ecosystem is booming. According to incomplete statistics, there are hundreds of applications. Obviously, the demand for developers is also rising, and a large number of developers are needed. At present, the most famous applications are encrypted cats, various side chain applications, ERC20 Token, such as coins, coins and fire coins.

Vitalik Buterin, the founder of 20 13, proposed to apply the concept of "smart contract" to the blockchain field, hoping to build an intelligent universal platform for multi-party computing based on blockchain and develop it through bitcoin financing.

20 14 Established the Ethereum Foundation in Switzerland to manage and operate the whole project.

The five major mines account for 83% of the computing power and are very concentrated.

At present, the total number of nodes is about 16000, including 546 1(34%) in the United States, 83911.5% in China, 963(6%) in Russia and 920 (5. The whole node changes dynamically every day. The distribution also reflects the participation of countries.