198 - WETH
WETH stands for Wrapped Ether. For protocols that work with ERC-20 tokens but also need to handle Ether, WETH contracts allow converting Ether to its ERC-20 equivalent WETH (called wrapping) and vice-versa (called unwrapping).
WETH can be created by sending ether to a WETH smart contract where the Ether is stored and in turn receiving the WETH ERC-20 token at a 1:1 ratio.
This WETH can be sent back to the same smart contract to be “unwrapped” i.e. redeemed back for the original Ether at a 1:1 ratio.
The most widely used WETH contract is WETH9 which holds more than 7 million Ether for now.
- Wrapper Ether
- Ether Vw. ERC-20
- Wrapping -> ERC-20
- Unwrapping -> Ether
- WETH Contract -> 1:1
- WETH9 -> 7M Ether
- WETH10 -> Efficiency & EIP-3156 Flash Loans