SunSwap

SunSwap V4 - Native TRX and Lower Energy

SunSwap

Launched 2 March 2026

SUN.io launched SunSwap V4 on 2 March 2026. A sun swap on V4 can use native TRX. You do not wrap TRX into WTRX before pairing it with a TRC-20. That is the change most people feel first. Under it, the architecture is different from V2 and V3. One contract holds the pools, instead of a new contract for every pair. The swap records net balance changes and settles them at the end, which is why multi-hop tron swaps cost less energy.

Hooks are custom logic that can run at steps such as a swap or a liquidity change. A developer can add a dynamic fee, a different curve, or an on-chain oracle without forking the core pool. Custom accounting lets that hook adjust the balance changes. Subscribers are optional contracts a liquidity provider can opt into, so a position can notify an outside contract when it changes. None of that takes custody of the wallet. You still sign.

SUN.io announced energy subsidies of up to 99% for swaps that go through V4. Energy is the TRON network cost, separate from the pool trading fee. V4 did not delete V2 or V3. Older pools still settle trades. V4 is the path built for native TRX and for lower energy on the same sun io app.

What changed from V3

  1. Native TRX can be one side of a pair. Wrapping to WTRX is no longer required for that.
  2. One contract manages pools, so creating a pool and hopping through several pairs uses less energy.
  3. Hooks attach extra logic at swap and liquidity steps.
  4. Subscribers can notify a contract you opt into when your position changes.

Frequently asked questions

What is SunSwap V4?

SunSwap V4 is the 2 March 2026 upgrade of the SUN.io exchange. It adds native TRX pairs, a single pool contract, hooks, and lower energy use. SUN.io announced energy subsidies of up to 99% on V4 swaps.

Do I still need WTRX?

Not for a V4 pair that uses native TRX. Older pools may still list WTRX. Read the token you are actually trading before you sign.

Does V4 replace V2 and V3?

No. V4 keeps the constant-product base and the concentrated-liquidity model, and it adds the new architecture. Existing V2 and V3 pools were not erased.