Ethereum

TL;DR

Founded in 2014 by Vitalik Buterin Ethereum has solved the problem of the inflexibility of Bitcoin. It

1. introduced support for smart contracts,

2. created the standards for creating user tokens.

Useful Data

Parameter	Data
Round	seconds
Consensus mechanism	Proof of Work
Token standard	ERC-20, ERC-721
Native Token	ETH = 10^9 Wei
Blockchain Programming Language	Go
Block Explorers	Etherscan, Etherchain, Ethplorer, Blockchair
Wallets	Supported Wallets

Stack

Layer	Description
1 EVM	140 opcodes make EVM Turing Complete
2 Smart Contracts	Solidity, Vyper, Yul, Yul+, Fe (Cheat Sheets)
3 Nodes	Ethereum Nodes
4 Client APIs	JavaScript, Python, Java
5 dApps	OpenSea, other, dApps