Dear Users,
To provide superior trading efficiency and a more secure authorization experience, SUN.io has completed a major upgrade to its Smart Router system. This upgrade officially introduces the Universal Router and Permit2 protocols.
Core Features
Universal Router
Acting as a universal instruction interpreter, the Universal Router supports swapping across multiple liquidity pools—including SunSwap V1, V2, V3, Curve, PSM, and HTX-SUN—within a single transaction.
Permit2
With the introduction of the Permit2 protocol, users only need to grant a one-time high-allowance approval to the Permit2 contract. This means:
- Lower Authorization Energy Costs: Eliminates the need for repeated Approve transactions for every new protocol.
- Enhanced Security Dimensions: Builds a dual risk control system based on time and amount by leveraging signature expiration deadlines and allowance limits.
Contract Addresses
To ensure the security of your assets, please verify and interact only with the officially disclosed contract addresses below:
| Contract Name | Network | Contract Address |
| Permit2 | TRON | TTJxU3P8rHycAyFY4kVtGNfmnMH4ezcuM9 |
| Universal Router | TRON | TSJEtPuqHpvSaVnSwvCsngaeBxrGUzp95Q |
We remain committed to enhancing the trading experience within the TRON ecosystem. We invite you to embark on this new trading journey.
Thank you for your continued understanding and support!
SUN.io Team
February 5, 2026