No.204
Wrapped Ether WETH
ETH's ERC-20 twin
π the mirror-twin of Ether, identical down to the cent, that slips on an ERC-20 disguise to walk through doors native ETH can't open
π¬ βI am Ether, just in a costume. Lock one ETH away and I appear, worth the exact same penny, but now wearing the badge every app asks for at the door. Send me back and the real ETH steps out again. No magic, no markup.β
- What it is: ETH packaged as an ERC-20 token, pegged 1:1 and always worth the same as ETH.
- Why it exists: native ETH is older than the ERC-20 standard, so many apps can't use it directly. WETH fixes that.
- How: wrap (ETH β WETH) and unwrap (WETH β ETH) are a 1:1 deposit and withdrawal, not a trade, so no slippage.
- Backing: no fixed cap, but never inflationary, exactly one WETH exists for each ETH locked in the contract.
π The Story
In the early days, Ethereum had an awkward little gap. Its native coin, ETH, was built before the smart-contract world settled on a shared shape for tokens. That shared shape, the ERC-20 standard, arrived later and quickly became the common language every app spoke. The problem: ETH itself didn't speak it. A coin that powered the whole network couldn't slot neatly into the apps being built on top of it.
December 2017. A group of early Ethereum and DeFi teams (0x, MakerDAO, Dharma, and Kyber are the ones usually credited) agreed on a tidy fix and shipped it together. There was no lone founder and no new coin to sell. They wrote a small contract, the canonical one called WETH9, and deployed it to Ethereum. The idea was simple to the point of being boring, which is exactly why it worked.
The deal it offered was a promise you could check yourself. Hand the contract one ETH and it hands you back one WETH, an ERC-20 token worth precisely the same. Hand the WETH back and your ETH returns. Every WETH in existence is matched by a real ETH sitting locked in the contract, so the two never drift apart.
It never tried to be exciting, and it never needed to. Today WETH is quiet plumbing under most of DeFi, the part nobody notices until they realize almost every swap they've made passed through it.
π Stats
𧩠How it works
WETH isn't a blockchain. It's a single token contract living on Ethereum, so it borrows all of Ethereum's security instead of running any consensus of its own. The whole mechanism is one swap and back: you deposit ETH and the contract mints you the same amount of WETH; you return the WETH and it burns it and releases your ETH. Because it's a deposit and withdrawal rather than a market trade, the rate is locked at exactly 1:1 with zero slippage. One handy tip: don't wrap all your ETH, keep a little native ETH back to pay gas fees.
π Light & Shadow
- The peg is mechanical, not a promise. Each WETH is backed by a real ETH held in the contract, so 1:1 holds by design
- Wrapping and unwrapping are a deposit and withdrawal, not a market trade, so there's no slippage and no spread to lose
- Quiet but everywhere. It's foundational plumbing for DEXes like Uniswap, where ETH must act like an ERC-20
- It is only ever as safe as its contract. The canonical WETH9 has been battle-tested for years, but a token contract is still code you trust
- βWrapped Etherβ exists on many chains now, the one here is the canonical Ethereum-mainnet WETH. Confuse it with a bridged copy elsewhere and you may not get the same backing
- It does nothing on its own, no yield, no innovation, no upside beyond ETH. It only follows ETH, so it also follows ETH straight down on a bad day
𧬠Evolution lineage
WETH isn't a fork or a rival chain. It's a derivative of Ethereum's ETH, an ERC-20 form that stays pegged 1:1 and fully ETH-backed. It shares the same wrapped-token family pattern as Wrapped Bitcoin (WBTC) and Wrapped XRP (WXRP), each a tokenized stand-in for a native coin.
π§ Meet other friends
β FAQ
- What is Wrapped Ether (WETH)?
- It is Ethereum's native coin ETH packaged as an ERC-20 token. One WETH is always pegged 1:1 to one ETH and worth exactly the same. It exists so ETH can be used by the many apps that only understand ERC-20 tokens.
- Is WETH the same value as ETH?
- Yes. WETH tracks ETH exactly, one for one, because every WETH is backed by one real ETH locked in the contract. When ETH moves, WETH moves the same amount. It is not a separate bet.
- How do I turn ETH into WETH and back?
- You send ETH to the WETH contract (wrapping) and it gives you the same amount of WETH; send the WETH back (unwrapping) and you get your ETH. It is a 1:1 deposit and withdrawal, not a trade, so there is no slippage. Keep some native ETH for gas fees.
- Who created WETH and is it its own blockchain?
- No single founder. A group of early Ethereum and DeFi projects championed it in 2017, and the canonical contract went live on Ethereum in December 2017. WETH is not its own chain, it is a token contract living on Ethereum and borrows Ethereum's security.
β οΈ Not investment advice. All figures are for information only