Fantom was an early high-performance EVM chain that launched in 2018, pioneered the async BFT consensus (Lachesis), and built a significant DeFi ecosystem. But by 2023, Fantom’s performance limits — around 2,000 TPS with moderate block times — were being surpassed by newer chains, and its developer incentives had weakened after the exit of crypto personality Do Kwon and market downturn. Rather than iterate on Fantom, the foundation made a bold decision: complete rewrite to a new architecture under the “Sonic” branding, with Andre Cronje (the DeFi architect behind Yearn and Solidly) leading technical development. Sonic launched in late 2024 with performance benchmarks far exceeding Fantom and a novel fee monetization model that pays developers a percentage of the fees their applications generate — a significant incentive innovation.
From Fantom to Sonic
The following sections cover this in detail.
Why Rebrand?
- New consensus protocol (Sonic consensus) based on DAG+BFT
- New client implementation from scratch
- New database architecture for faster state access
- New native token: S (replacing FTM on a 1:1 migration basis)
- New developer incentive model
FTM migration: Fanttom FTM holders can migrate to S tokens (1 FTM → 1 S). The migration has a defined window.
Andre Cronje’s Role
- The new Sonic consensus
- The Sonic database (SonicDB) optimized for EVM state storage
- The fee monetization (FeeM) model
Technical Architecture
The protocol is built around the following components.
Sonic Consensus
- Sub-second finality — transactions finalize in ~1 second
- 10,000+ TPS throughput — significantly higher than Fantom’s ~2,000 TPS
- Leaderless consensus — no rotating leader creates bottlenecks
- DAG (Directed Acyclic Graph) event gossip — validators broadcast events, not blocks
Under load testing, Sonic demonstrated over 10,000 TPS with sub-second finality — competitive with the fastest EVM chains.
SonicDB
- Optimized data layout for EVM-specific access patterns
- Faster state reads/writes during transaction execution
- Reduced storage requirements vs. Fantom
EVM Compatibility
- All Fantom dApps (Beethoven X, SpookySwap, etc.) can redeploy with minimal changes
- Standard Ethereum tooling (Foundry, Hardhat, MetaMask) works
- EVM opcodes fully supported
Fee Monetization (FeeM)
The most distinctive innovation in Sonic’s model: Fee Monetization.
How it works:
- Developers register their smart contracts with the FeeM program
- When users pay transaction fees on those contracts, 15% of the gas fee goes back to the contract developer
- The developer’s share accrues on-chain and is claimable
Why this matters:
Normally, 100% of gas fees go to validators. Sonic routes a share to application developers. This creates a revenue model for dApp developers based on actual usage — not just token emissions or fundraising.
Example: If an AMM on Sonic processes $1M of trades generating 0.1% fees in gas, 15% of that gas revenue goes to the AMM’s developers. The more usage, the more developer revenue.
Comparison to other incentive systems:
- Ethereum: All gas to validators
- Optimism: Sequencer fees to OP Foundation; separate grant programs
- Sonic FeeM: Protocol-level revenue share to dApp developers
This is a competitive differentiator for attracting developers to Sonic — not just grants (temporary) but ongoing revenue from their application’s success.
Sonic Gateway (Bridge)
The Sonic Gateway serves as the primary bridge connecting Sonic to Ethereum and other chains:
- ETH and stablecoins bridge to Sonic
- Bridge security: multi-signature scheme with time delays
- Used for onboarding new liquidity to the Sonic ecosystem
DeFi Ecosystem
Sonic inherited some Fantom projects and attracted new ones. Key DeFi protocols:
Homegrown:
- Equalizer Exchange — Solidly-model DEX (Cronje’s Solidly concept)
- SpookySwap — Migrated from Fantom; AMM DEX
- Beethoven X — Balancer-style AMM
New arrivals attracted by FeeM:
- Multiple new DEXs and lending protocols building on Sonic specifically for the fee revenue model
The S Token
S is the native token of the Sonic chain:
| Property | Value |
|---|---|
| Migration ratio | 1 FTM = 1 S |
| Total supply | ~3.17 billion (same supply as FTM migrated, plus incentives) |
| Gas token | Yes — S is used for gas fees |
| Staking | Validators stake S to participate in consensus |
[KEY STATS TABLE — Sonic (S)]
Social Media Sentiment
The Sonic launch generated significant excitement driven largely by Andre Cronje’s reputation and the innovative FeeM system. The Fantom community mostly converted to Sonic believers, viewing the rebranding as a necessary evolution rather than abandonment. Crypto Twitter greeted the FeeM model as “the first protocol that actually pays developers for usage” — a meaningful narrative point. The main skepticism: Fantom already had this opportunity and lost DeFi market share to newer chains; can Sonic differentiate when Arbitrum, Base, and BNB all have larger ecosystems? Andre Cronje’s continued involvement is viewed as crucial — he has a history of building innovative DeFi primitive (Yearn, Solidly) and then disappearing, with Sonic being a test of sustained development commitment. TPS benchmarks are strong, but benchmark TPS rarely translates to real-world advantage unless a killer app leverages it.
Last updated: 2026-04
How to Get Sonic (S)
- Buy FTM on a centralized exchange and migrate to S, or purchase S directly on supporting exchanges
- Connect MetaMask or another EVM wallet to Sonic RPC (chainid: 146)
- Explore Sonic DeFi: SpookySwap, Equalizer, Beethoven X
- Stake S for validator rewards or provide LP
Store S and assets on a hardware wallet:
Related Terms
Sources
Lamport, L., Shostak, R., & Pease, M. (1982). The Byzantine Generals Problem. ACM Transactions on Programming Languages and Systems, 4(3), 382–401.
Baird, L. (2016). The Swirlds Hashgraph Consensus Algorithm: Fair, Fast, Byzantine Fault Tolerance. Swirlds Tech Report.
Antonopoulos, A. (2018). Mastering Ethereum. O’Reilly Media.
Reijsbergen, D., Sridhar, S., Monnot, B., Leonardos, S., Skoulakis, S., & Piliouras, G. (2021). Transaction Fees on a Honeymoon: Ethereum’s EIP-1559 One Month Later. IEEE ICBC.
Zhang, F., et al. (2019). Parallelizing Security Checks on Ethereum. VEE 2019.