A beginner's tutorial on Ethereum Smart Contract programming

Basic concepts

Knowing these nouns is a good place to start:

Public key cryptography System. Alice has a public key and a private key. She can create a digital signature with her private key, and Bob can use her public key to verify that the signature was actually created with Alice's private key, that is, Alice's signature. When you create an ethereum or Bitcoin wallet, the long 0xdf...5f address is essentially a public key, and the corresponding private key is saved somewhere. An online wallet similar to Coinbase can help you keep your private key, and you can keep it for yourself. If you lose the private key of a wallet that has money, you will lose that money forever, so you'd better make a backup of the private key. "It is very painful to learn this by stepping on the pit," said the experienced.

Point-to-point network. Like BitTorrent, all the nodes in the Ethereum distributed network have equal status and no hub servers. (In the future there will be semi-centric hybrid services for users and developers to facilitate, as we'll talk about later.) )

Block chain. Blockchain is like a world-only book, or database, that records all the trading history in the network.

Ethereum virtual Machine (EVM). It allows you to write more powerful programs on the Ethereum (you can also write scripts on Bitcoins). It is sometimes used to refer to the Ethereum blockchain, which is responsible for performing smart contracts and everything.

Node. You can run the node, read and write the Ethereum blockchain, and even use the virtual machine. The full node needs to download the entire chunk chain. The light node is still under development.

Miners. Mining, which is the node that handles chunks on the blockchain. This page can see the current active part of the Ethereum miner: stats.ethdev.com.

Proof of workload. The miners are always competing to solve some mathematical problems. The first to solve the answer (figure out the next chunk) will receive the aether as a reward. All nodes are then updated with their own blockchain. All miners who want to work out the next chunk have to keep up with the rest of the nodes and maintain the power of the same blockchain, so the entire network can always reach a consensus. (Note: Ethereum is planning to turn to a proof of entitlement system (POS) without miners, but that is not covered in this article.) )

Ether coins. Abbreviation ETH. A real digital currency that you can buy and use. Here is the chart of one of the exchanges that can trade the etheric currency. At the time of writing this article, 1 etheric coins were worth 65 cents.

Gas. (petrol) The implementation of the program on the Ethereum and the preservation of data will consume a certain amount of the etheric currency, gas is the conversion of the etheric currency. This mechanism is used to ensure efficiency.

A beginner's tutorial on Ethereum Smart Contract programming