Wei is the smallest unit of ether (ETH), the native cryptocurrency of the Ethereum blockchain. It is named after Wei Dai, a computer scientist and cryptographer who is credited with being one of the earliest proponents of the concept of cryptocurrency.Ethereum uses a decimal system for its cryptocurrency, with one ETH equal to 10^18 wei. This means that any amount of ETH can be divided into smaller units of wei, making it easier to transact with smaller amounts of the cryptocurrency.Wei works in a similar way to other units of cryptocurrency, such as satoshi in Bitcoin. Transactions on the Ethereum blockchain are recorded on a public ledger and processed by nodes on the network. When a transaction is made, the sender specifies the amount of wei they want to send, and the recipient's wallet will receive the equivalent value in ETH.The history of wei dates back to the launch of the Ethereum network in 2015. Since then, the Ethereum network has grown to become one of the largest and most widely used blockchain platforms, with applications ranging from decentralized finance (DeFi) to gaming and beyond. Today, ETH is one of the most valuable cryptocurrencies in the world, with a market capitalization of over $100 billion.In conclusion, Wei is a small unit of ether, the native cryptocurrency of the Ethereum blockchain. It is used to transact with smaller amounts of ETH, and it works in a similar way to other units of cryptocurrency. Wei has a rich history, dating back to the launch of the Ethereum network in 2015, and it is now a key part of one of the largest and most widely used blockchain platforms in the world.