SunSwap: security, fees and reviews
Decentralized exchange
In short
- Legal entity
- Not named: the terms of use refer only to the 'SUN team'
- Fees
- Swap fee (V1): 0.3% per swap (as of 1 November 2026)
- Risks and caveats
- No operator company is named in the terms of use, and the SUN team says it is not registered with the Monetary Authority of Singapore.
- Checked
- 1 November 2026
Visitor ratings: do you like SunSwap?
Key facts
- Type
- Decentralized exchange
- Exchange launched
- 2020
- Operator
- Not named in the terms of use ('SUN team'); SUN token issuer: JustSwap Foundation Ltd. (Singapore)
- Official site
- sunswap.com
Key facts checked on 1 November 2026 against official sources.
What is SunSwap
SunSwap, formerly JustSwap, is a decentralised exchange (automated market maker) on the TRON blockchain, part of the SUN.io platform. It runs liquidity pools in four versions, V1 to V4, for swaps between TRC20 tokens and TRX, and uses the SUN token for governance, rewards and buy-back and burn.
Good to know
- JustSwap was renamed SunSwap after SUN.io acquired it; TRON DAO announced the acquisition on 20 October 2021. ↗
- The old domain justswap.org permanently redirects to sunswap.com. ↗
- The terms of use are with the 'SUN team'; no registered company, registration number or address is given. ↗
- The SUN.io interface says it is not registered with the Monetary Authority of Singapore and does not broker or settle trades. ↗
- The SUN token white paper names JustSwap Foundation Ltd., a Singapore company limited by guarantee, as the token issuer. ↗
- SunSwap V1 pools still exist but V1 is not recommended for new pairs; every V1 pair must include TRX. ↗
- Part of every SunSwap V2 trading fee (0.05% of the trade) is used to buy back and burn SUN. ↗
Services
| Parameter | Details |
|---|---|
| Spot trading | Token swaps through AMM liquidity pools (SunSwap V1, V2, V3 and V4), routed through the Universal Router. |
| Liquidity pools | V2 lets anyone create a pair between any two TRC20 tokens; liquidity providers receive LP tokens. |
| Liquidity pools | V3 adds concentrated liquidity: providers choose a token pair, fee tier and price range. |
| Liquidity pools | V4 adds Hooks, a single contract for all pools, flash accounting and native TRX pairs. |
| Staking / Earn | Liquidity mining: LP tokens can be staked, or SUN locked, to earn rewards. |
| Own token | SUN: used for governance, liquidity rewards and buy-back and burn; locking SUN gives veSUN. |
| Own blockchain | None of its own: SunSwap runs on the TRON blockchain. |
| Custody / wallet | Non-custodial interface: users keep their own private keys. |
Security and audits
- Non-custodial: trades settle on the TRON blockchain and users hold their own keys.
- SUN.io says its smart contracts were audited by SlowMist and warns that an audit cannot remove all risk.
- On 29 March 2023 SUN.io said its mining pools were back to normal after a downtime and that user funds were safe.
- SUN.io warns users to check that they are on https://sun.io because phishing sites impersonate it.
Security incidents
| Date | What happened | Source |
|---|---|---|
| 29 March 2023 | Outage: SUN.io announced that its mining pools were back to normal after a recent downtime and said all user funds were safe. The notice does not give the cause or the start date of the downtime. | sunio.zendesk.com |
Further incidents are reported by third parties (press, incident databases) but are not confirmed in the company’s own channels, so they are not listed here.
Fees
| Parameter | Details |
|---|---|
| Swap fee (V1) | 0.3% per swap (as of 1 November 2026) |
| Swap fee (V2) | 0.3% per swap: 0.25% to liquidity providers, 0.05% used to buy back and burn SUN (as of 1 November 2026) |
| Swap fee (V3) | 0.01%, 0.05%, 0.3% or 1% per swap, chosen by the pool creator (as of 1 November 2026) |
| Swap fee (V4) | Same static tiers as V3, or a dynamic fee through a hook, capped at 5% (as of 1 November 2026) |
Who can use it
- Verification: No identity verification: the interface says it collects only wallet addresses, transaction hashes and token identifiers.
- Not for citizens, residents or organisations of the Chinese Mainland, Taiwan, Hong Kong, the United States or Singapore, or sanctioned persons; users must be of the age of majority.
History
| Date | Event |
|---|---|
| 18 August 2020 | JustSwap, TRON's first token exchange protocol, launches. |
| October 2021 | JustSwap describes itself as a decentralised exchange protocol for automated liquidity on TRON. |
| 20 October 2021 | TRON DAO announces that SUN.io has acquired JustSwap and upgraded it to SUNSwap. |
| November 2021 | sunswap.com carries the same tagline under the SunSwap name. |
| 28 June 2023 | SunSwap V3 launches with concentrated liquidity and four fee tiers. |
| 31 July 2024 | SUN.io launches SUN DAO for on-chain governance. |
| 2 March 2026 | SunSwap V4 launches with Hooks, a singleton contract and native TRX support. |
Risks and caveats
- No operator company is named in the terms of use, and the SUN team says it is not registered with the Monetary Authority of Singapore.
- The interface is not offered to people in the Chinese Mainland, Taiwan, Hong Kong, the United States or Singapore.
- Smart-contract risk remains despite the SlowMist audit, and liquidity providers face impermanent loss and stablecoin de-peg risk.
- Phishing sites impersonate SUN.io; users are told to type https://sun.io directly.
About the company
- Legal entity
- Not named: the terms of use refer only to the 'SUN team'
- Headquarters
- Not disclosed; the interface is operated from facilities in Singapore and disputes go to arbitration in Singapore
- Own token
- SUN, issued by JustSwap Foundation Ltd., a public company limited by guarantee in Singapore (per the SUN MiCA white paper)
- Own token
- The white paper gives JustSwap Foundation Ltd.'s registered address as 171 Chin Swee Road, CES Centre, Singapore
- Parent company
- Admission of SUN to trading is sought by SUN Technology Network Limited (British Virgin Islands), which states it has no parent company
- Own token
- SUN total supply: 19,900,730,000 after a 1:1000 redenomination in May 2021
- Formerly
- JustSwap (launched 18 August 2020), renamed SUNSwap / SunSwap in October 2021
- Founded
- 18 August 2020 (JustSwap launch)
Official links
- Website: sunswap.com
- Platform: sun.io
- Docs: docs.sun.io
- Fees: docs.sun.io/trade/trading-fee
- Terms of use: sun.io/docs/SUN_Terms_of_Use_en.pdf
- Security: docs.sun.io/get-started/risks
- Blog: sunio.zendesk.com/hc/en-us
Questions and answers
Is SunSwap the same as JustSwap?
Yes. JustSwap, launched on 18 August 2020, became SUNSwap after SUN.io acquired it; TRON DAO announced this on 20 October 2021, and justswap.org now redirects to sunswap.com.
What are SunSwap's fees?
V1 and V2 swaps cost 0.3% (on V2, 0.05% buys back and burns SUN); V3 pools use 0.01%, 0.05%, 0.3% or 1%; V4 can add a dynamic fee capped at 5% (as of 1 November 2026).
Who operates SunSwap?
The terms of use name only the 'SUN team'. The SUN token white paper names JustSwap Foundation Ltd. (Singapore) as the token issuer.
Is SunSwap regulated?
No licence is disclosed. The terms say the SUN team is not registered with the Monetary Authority of Singapore.
Has SunSwap had security incidents?
SUN.io announced on 29 March 2023 that its mining pools were back to normal after a downtime and said all user funds were safe.
Sources
- TRON DAO (Medium) - SUN.io Officially Acquires JustSwap ... SUNSwap (20 October 2021), Wayback copy
- SUN.io Docs - Overview and history
- SUN.io Docs - Trading fees
- SUN.io Docs - Protocols overview
- SUN.io Docs - SunSwap V1
- SUN.io Docs - SunSwap V2
- SUN.io Docs - SunSwap V3
- SUN.io Docs - SunSwap V4
- SUN.io Docs - Risks
- SUN.io Docs - veSUN
- SUN.io Docs - SUN buyback and burn
- SUN.io - Terms of Use (last updated 4 January 2022)
- SUN.io Token - MiCA white paper (28 October 2025)
- SUN.io Help Center - SunSwap V3 launch
- SUN.io Help Center - SunSwap V4 launch
- SUN.io Help Center - SUN DAO launch
- SUN.io Help Center - Mining pools restored (29 March 2023)
- SUN.io Help Center - Phishing warning (12 March 2025)
- Wayback - justswap.org (6 October 2021)
- Wayback - sunswap.com (21 November 2021)
- justswap.org redirect
More in this section
How voting works
Votes are anonymous and carry no text. Each device has one vote per item; press the same button again to remove it. Cloudflare Turnstile checks that a person is voting. We keep a random device ID in a cookie and a salted hash of the IP address to limit abuse — no names, no accounts. Votes are visitors’ opinions, not investment advice.
Page updated: