What is Sonic Blockchain: The 10,000 TPS Chain Evolved from Fantom

Sonic is a new Layer 1 blockchain that evolved from Fantom — once one of the most popular EVM blockchains during the DeFi Summer of 2021. With a complete rewrite from the ground up, Sonic claims to support up to 10,000 transactions per second (TPS) with sub-second finality, making it significantly faster than the original Fantom Opera.

What sets Sonic apart isn't just speed — it's the Fee Monetization Program, a system that returns a portion of gas fees directly to dApp developers, creating a new and sustainable revenue model that no other major blockchain currently offers.

What is Sonic and How Did It Evolve from Fantom?

Fantom launched in 2018 as a high-speed EVM blockchain using a DAG-based aBFT consensus mechanism called Lachesis. During 2020–2021, Fantom gained enormous popularity when Andre Cronje — a prolific DeFi developer — built a rich ecosystem on the chain, pushing its TVL (Total Value Locked) to billions of dollars.

However, as the crypto market cooled in 2022 and community demands for speed and developer tooling grew, the Fantom Foundation decided on a major upgrade rather than incremental patches. The result was Sonic — a completely rewritten blockchain that launched its mainnet in December 2024.

The transition from Fantom Opera to Sonic was not merely a rebrand but a fundamental architectural change. The Fantom Opera chain continues to operate as a legacy chain, while Sonic is a new, separate network with a bridge for asset migration.

The Technology Behind 10,000 TPS

Sonic uses an improved Lachesis aBFT consensus mechanism — the same battle-tested approach from Fantom but significantly upgraded. The 10,000 TPS capability comes from several key innovations:

SonicDB — a new database system designed to reduce disk I/O and speed up transaction verification. The original Fantom used a traditional database structure that created bottlenecks. SonicDB solves this with a completely redesigned state storage approach.

Carmen — a new storage engine that enables faster data access and reduces the state size that validators must store, making network syncing faster and cheaper.

Sub-second Finality — Unlike many blockchains that require multiple block confirmations, Sonic uses immediate finality. Once a transaction is confirmed, it cannot be reversed. This allows developers to build payment applications without waiting for long confirmation times.

Fee Monetization Program: New Revenue for Developers

One of Sonic's most distinctive innovations is the Fee Monetization Program — a system that returns a portion of gas fees directly to dApp developers.

How it works: When a user pays a gas fee to use a dApp's smart contract, a portion of that fee (up to 90% according to Sonic's rules) is sent directly to the developer who owns that contract, rather than all of it going to validators.

Why does this matter? In most blockchains, dApp developers receive no portion of gas fees — all transaction costs flow to miners or validators. Sonic's Fee Monetization changes this model by giving developers a recurring revenue stream directly from user activity, allowing teams to sustain projects long-term without relying solely on token sales.

For example, if a DEX on Sonic has $10 million in daily trading volume and users pay $1,000 in total gas fees per day, the DEX development team could receive up to $900 of that directly.

Sonic Gateway and Cross-Chain Bridging

Sonic Gateway is the official bridge connecting Sonic to Ethereum and other networks, designed to make cross-chain asset transfers secure and low-cost.

Main assets supported through the Gateway include USDC, USDT, ETH, WBTC, and other ERC-20 tokens from Ethereum. It also supports migration from Fantom Opera for FTM and tokens on the original Opera chain.

For security, Sonic Gateway uses multi-sig mechanisms and optimistic verification similar to Optimistic Rollups, with a challenge period to ensure transfers are legitimate and final.

For those holding FTM on the original Fantom Opera, the Sonic Gateway can be used to migrate to S tokens on Sonic at a 1:1 exchange rate. Always verify current deadlines and procedures from official Sonic Foundation channels.

The S Token and Migration from FTM

Sonic's native token is S, replacing FTM (Fantom). The total supply is structured to accommodate both existing FTM holders and new S distribution for the ecosystem.

Primary use cases for the S token:

(1) Gas Fees — pays for all types of transactions on Sonic
(2) Staking — S holders can delegate to validators to help secure the network and earn staking rewards
(3) Governance — voting on network parameters, such as fee distribution rates to developers
(4) Validator Bonding — validators must stake a certain amount of S to participate in network validation

For FTM holders — migration from FTM to S can be done through Sonic Gateway at a 1:1 exchange rate. Always check the latest deadlines from official Sonic Foundation sources as these may be updated.

Ecosystem Fund and dApp Attraction

The Sonic Foundation allocated an Ecosystem Fund worth over $190 million to attract developers and new projects to build on Sonic. This is divided into small project grants, DeFi protocol incentives, and hackathon rewards.

Sonic's strategy for attracting dApps differs from other blockchains because in addition to upfront grants, the Fee Monetization provides long-term revenue for developers, making the move to Sonic more attractive than just receiving a one-time grant.

Projects that migrated or expanded to Sonic early include SpookySwap (DEX from original Fantom), Beefy Finance (yield optimizer), and several new protocols built specifically for Sonic.

DeFi on Sonic: Key Protocols

While Sonic's ecosystem is still growing, several key DeFi protocols are already active:

DEX and AMM: SpookySwap migrated from Fantom with existing liquidity, suitable for swapping standard EVM tokens. Several new DEXs were also built specifically to leverage Sonic's speed.

Lending & Borrowing: Multiple lending protocols have moved to Sonic to provide crypto asset borrowing and lending services using collateral.

Yield Optimization: Beefy Finance and other vault aggregators operate on Sonic to automatically maximize DeFi yields for users.

Liquid Staking: Liquid staking protocols allow users to stake S and receive a liquid token in return, enabling DeFi participation while still earning staking rewards.

Risks and Limitations

Despite Sonic's technical strengths, there are important risks users should understand:

Technical Risk: Sonic was rewritten from scratch. While the foundation comes from battle-tested Fantom, new additions like SonicDB and Carmen may contain undiscovered bugs that will only surface with real-world usage over time.

Centralization Risk: In early stages, the validator set may be limited in size, representing a degree of centralization risk that should be monitored.

Bridge Risk: Using Sonic Gateway carries the risk of bridge exploits — a category of attack that has affected many bridges in the past. Users should transfer only amounts they can afford to lose if issues arise.

Adoption Risk: Sonic's success depends on attracting developers and users long-term. If the ecosystem doesn't grow sufficiently, TVL and transaction volume may decline, affecting the value of the S token.

Price Risk: The S token is highly volatile like other altcoins. Investors should be prepared for significant short-term losses.

Comparison with Ethereum L2s and Solana

Sonic vs Solana: Both target high speed, but Solana uses SVM (Solana Virtual Machine) which is incompatible with EVM. Sonic is EVM-compatible, meaning Ethereum dApps can be deployed with minimal code changes. Solana has the advantage of a larger, more established ecosystem.

Sonic vs Arbitrum/Optimism: Ethereum L2s like Arbitrum and Optimism inherit Ethereum's security — the industry gold standard. However, gas fees are higher than Sonic and finality is slower due to L1 dependencies. Sonic has the edge on speed and fees but doesn't benefit from Ethereum's security backing.

Sonic vs Original Fantom Opera: Sonic is faster, has better developer tooling, and offers the Fee Monetization program that Fantom never had. Moving to Sonic is logical for existing Fantom projects.

In summary, Sonic is best suited for developers familiar with EVM who need high speed, low fees, and want sustainable long-term revenue through Fee Monetization.

Frequently Asked Questions

Conclusion

Sonic blockchain represents a compelling example of an older blockchain evolving into a new architecture that better addresses current market demands. With 10,000 TPS, low gas fees, and the unique Fee Monetization Program, Sonic positions itself as a serious EVM alternative for both developers and DeFi users.

However, long-term success depends on maintaining developer mindshare amid fierce competition from Solana, Arbitrum, Base, and other blockchains. Those interested in Sonic should monitor TVL growth, active dApp count, and network security over the next 1-2 years before committing large investments.

This article is for educational purposes only and does not constitute financial advice.