Why on Sonic
We didn't pick Sonic because it's trendy. We picked it because the original Fantums collection died on a slow, centralised, end-of-life chain, and the things that killed it are exactly the things Sonic solves.
Three reasons
1. FeeM — 90% gas rebate to the dApp
Sonic Labs ships a program called Fee Monetisation (FeeM) that returns 90% of gas fees generated by a registered dApp back to the dApp wallet. Registration is a single transaction (25 S, refundable).
A duel-heavy game burns gas as the product. On most chains, that gas is dead value. On Sonic, it loops back into the project. Our FeeMSplitter.sol routes the rebate into a public splitter:
| Slice | Recipient |
|---|---|
| 50% | sFUM buyback + burn |
| 30% | Community treasury — tournament pools, Discord rewards, art bounties |
| 20% | Dev treasury, vested |
The community-facing 80% is the headline. The longer you play, the larger the prize pool gets.
2. Fast finality, sub-second confirmations
The original Fantums duel loop was sluggish — Fantom Opera was throttled and the duel resolution lived off-chain on api.fantums.com, which is the same server that eventually 502'd. Sonic finalises in under a second on the canonical path. PvP duels feel instant. Tournament brackets become viable. Best-of-3 sets become viable. The chain stops being the bottleneck on the play loop.
3. Clean brand, clean break
Fantom Opera shutting down is doing us a favour. The new chain is a clean canvas. Sonic's brand language — speed, sound, neon, electric — is exactly the rebirth aesthetic we wanted. Our art direction leans into it: porcelain bodies, fluro pink accents, cabaret gold. No baggage. No expectation that we have to look exactly like the original. We honour the past with the legacy DNA hook, not by being trapped by the pumpkin-orange palette.
What we get from Sonic specifically
| Feature | What it means |
|---|---|
| chainId 146 | Native asset is S. Explorer at sonicscan.org. |
| Sonic Gateway | Canonical bridge to Ethereum mainnet. Liquidity flows in cleanly. |
| Native USDC via CCTP V2 | Real Circle USDC, not a wrapped derivative. Stable pricing for the mint and the marketplace. |
| Multicall3 | Same canonical address as every other EVM chain. Our snapshot/read tooling is portable. |
| EVM equivalence | Solidity 0.8.24 with via_ir + OpenZeppelin 5.x compile and deploy without modification. |
What we built around it
- Sonic-native USDC immutable in
MintDrop.sol— public mint takes USDC, not a stablecoin proxy. - FeeM registration scripted into the mainnet deploy day, not a post-launch afterthought.
- All snapshot tooling reads from the Fantom Opera RPC once (already done — see The origin story), then everything else lives on Sonic. There is no runtime dependency on Fantom Opera after launch day. When the chain goes dark on 2026-06-30, Fantums Reborn doesn't notice.
What we're still picking
| Decision | Status |
|---|---|
| Primary DEX (SwapX / Shadow / Beethoven / Equalizer) | TBD at launch. Pick on TVL + LP-burn UX at build time. |
| Chainlink S/USD oracle | TBD at launch. Sonic price feed reference still being plumbed. |
These are post-launch tunings, not blockers.
See also
- The origin story for what Sonic is replacing.
- Tokenomics for how FeeM ties into sFUM supply.
- Contract addresses for the canonical Sonic addresses we depend on.
Last updated: 2026-05-21