Sonic — the high-throughput EVM (formerly Fantom)
Sonic is the rebranded and re-architected Fantom chain, with a new S token migrated 1:1 from FTM. We handle the migration and the new chain's transaction profile.
Sonic Labs migrated the Fantom Opera chain to a new architecture in late 2024 / early 2025, renaming the network and migrating FTM to S tokens 1:1. For treasuries holding FTM, the migration is a 1:1 swap with cost-basis continuity. The chain's appeal is high throughput EVM with sub-second finality. The DeFi ecosystem includes Beethoven X (Balancer fork), Equalizer DEX, and Aave V3.
What's tracked on Sonic
S token transfers (and FTM legacy)
1:1 migration from FTM to S with cost-basis continuity.
ERC-20 transfers
Sonic DeFi tokens and bridged stablecoins.
Validator staking
Per-epoch reward accrual.
Beethoven X, Equalizer, Aave on Sonic
DeFi positions tracked end-to-end.
Sonic accounting questions
How is the FTM → S migration treated?
As a 1:1 token migration with cost-basis continuity. No realized gain on the swap; the original acquisition date and basis transfer to S.
Other chain coverage and tax guides relevant to this network.
Book Sonic the right way
Free during Alpha. Connect a wallet, see every transaction reconciled to journal entries.