August 6, 2026 · 4 min read
Sonic RPC: What Fantom Became — New Chain ID, Sub-Second Finality
Sonic is the high-performance L1 successor to Fantom Opera (chain ID 146, not 250) with sub-second finality and a 90%-fees-to-developers model. It's standard EVM (viem/ethers/foundry work), but if you're migrating from Fantom the new chain ID and S token are the first things to get right. Here's the developer map.
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