What WTRX (Wrapped TRX) is, where you need it, and how the conversion works
If you’ve spotted a TOKEN/WTRX pair on DexScreener or a WTRX balance in your wallet without knowing where it came from, what you’re looking at is the tokenized version of the TRON native coin. WTRX is TRX wrapped into a TRC-20, one to one, so network contracts can treat it like any other token.
In this post I’ll walk you through what WTRX is, where it shows up across TRON, how to convert TRX into WTRX and back using the Smithii tool, and when you actually need it. Let’s start with the basics, then I’ll show you the conversion process.
What WTRX is and why it exists on TRON
TRX is the native coin of TRON and it’s what pays for network resources, plus it handles basic transfers. But TRX is not a TRC-20 contract. It has no approval or delegated transfer functions, which are exactly what a DEX or a lending protocol needs to move your funds.
WTRX fills that gap. It’s a TRC-20 contract where you deposit TRX and get the same amount back as WTRX; whenever you want, you return the WTRX and the contract hands your TRX back. The official WTRX contract is TNUC9Qb1rRpS5CbWLmNMxXBjyFoydXjWFR and it uses 6 decimals.
It’s the same mechanism other networks use for their native asset, like WETH on Ethereum. Nothing changes in value: the only thing that changes is how contracts can handle it.
Where you’ll run into WTRX on TRON
Even if you’ve never manually converted TRX, WTRX has probably passed through your trades at some point. These are the places where it shows up most often:
- Inside SunSwap pools: pairs against TRX actually hold WTRX in their reserves. That’s why screeners display the pair as TOKEN/WTRX.
- In DeFi protocols: lending platforms, vaults, and aggregators that only accept TRC-20 will ask you for WTRX instead of TRX.
- In your own wallet: if an app sent you WTRX instead of TRX, you’ll see it as a separate token with the same value.
If you want to check a pair before trading, here’s how to spot the risk signals of a TRC-20.
How to convert TRX into WTRX with Smithii
The Smithii Wrapper for TRON is a tool that lets you switch between TRX and WTRX in both directions from a single screen, always using the official contract and without having to track it down on TronScan. You type the amount, see what you’ll get back, and sign from TronLink. This is the interface you’ll see:
Before you start, make sure you have the TRX you want to convert plus 2 TRX for the fee and a bit of margin for Energy. Then:
- Connect TronLink: on TRON Mainnet, with the TRX you want to convert plus 2 extra TRX for the fee.
- Type the amount in You Wrap: the top field is the TRX you’re sending in.
- Check You Receive: the amount of WTRX you’ll get, always matching what you send in.
- Hit Wrap and sign: first the Smithii fee, then the conversion on the official WTRX contract.
The WTRX lands in your wallet as soon as the transaction confirms. If you don’t have enough balance, the tool warns you before you sign, so there’s no way to end up with the fee paid and the conversion half-done.
How to swap WTRX back into TRX
Hit the arrow button between the two fields and the tool flips direction: you send WTRX on top and receive TRX below. The process is the same, with the same 2 TRX fee, and the tool checks beforehand that you have enough WTRX to unwrap the amount you’ve typed.
How to verify your WTRX is the official one
Anyone can deploy a TRC-20 and call it WTRX, and some scams do exactly that so it looks like a balance with real value. The name and ticker prove nothing: the only thing that identifies the real WTRX is its contract address.
- Compare the address: the official WTRX is TNUC9Qb1rRpS5CbWLmNMxXBjyFoydXjWFR. If the token in your wallet shows a different one, it isn’t WTRX no matter what it’s called.
- Check the listing on TronScan: the official contract is described as the official TRX wrapping contract and shows a huge daily volume.
- Be suspicious of balances you didn’t ask for: WTRX that appears out of nowhere is usually bait to get you to interact with a malicious contract.
The Smithii Wrapper always operates against the official contract, so what you get through it is the genuine WTRX.
When you actually need WTRX, and when you don’t
A lot of people wrap TRX into WTRX just in case, and that’s often unnecessary. Smithii’s liquidity tools accept TRX directly when the pair is against TRX: the router handles the conversion inside the same transaction, both when you add and when you withdraw.
You genuinely need WTRX when a contract only accepts TRC-20 tokens: a lending protocol, a vault, an aggregator, or a airdrop you’re paying out in WTRX. In those cases, wrapping first saves you an error from the app.
To add to your pair without going through WTRX, check out how to add liquidity to a SunSwap pair on TRON.
How much it costs to wrap TRX with Smithii
The fee is 2 TRX per operation, whether you’re wrapping or unwrapping, plus the Energy and Bandwidth the network consumes. It’s charged as a separate transfer, so the conversion is exactly one-to-one: wrap 500 TRX and you get 500 WTRX, but you’ll sign a contract for 502 TRX.
There’s no slippage or price that can move against you, because you’re not buying anything on a market: you deposit into the contract and receive the equivalent. And if the conversion fails after you’ve paid the fee, the next attempt won’t charge it again.
FAQ
Is WTRX worth the same as TRX?
Yes. Every WTRX is backed by one TRX deposited in the contract, and the conversion in both directions is always one-to-one. That’s why its price tracks TRX.
How much does it cost to convert TRX into WTRX with Smithii?
The fee is 2 TRX per operation, for both wrapping and unwrapping, plus the network’s Energy. The amount you convert isn’t reduced: the fee is a separate transfer.
Do I need WTRX to create a pool on SunSwap?
Not necessarily. Smithii’s liquidity tools accept TRX directly on pairs against TRX and handle the conversion along the way. You need WTRX when a contract or an app only accepts TRC-20.
What’s the official WTRX contract?
It’s TNUC9Qb1rRpS5CbWLmNMxXBjyFoydXjWFR, the one TronScan flags as the official TRX wrapping contract. Always double-check this address before interacting with anything claiming to be WTRX.
What happens if the conversion fails after the fee is paid?
The tool remembers that the fee is already paid. If you retry, you won’t be charged again and only the conversion itself is repeated.
Conclusion
Once you know what WTRX is, you can spot it in a pool, on a scanner, or in your wallet and convert between TRX and WTRX in a single operation whenever a contract asks for it. Its value is always TRX’s value; the only thing that changes is what contracts can do with it.
Before wrapping, ask yourself whether you really need it. Keep TRX for network resources and use WTRX only where a contract requires it.
Industrial Engineer turned Solana trader. Marketing at Smithii and contributor to the $SHRIMP memecoin launch.
