Migration Guides
Migration Guides
Step-by-step migration references for upgrading your Across integration.
Available Migrations
Suggested Fees → Swap API
Move from the legacy /suggested-fees + depositV3 flow to the Swap API — and attribute volume with an Integrator ID.
Solana Migration
Prepare for USDC bridging on Solana — API changes, deposit flow, and relayer updates.
V2 to V3 Migration
Upgrade from Across V2 to V3 — new events, functions, fee structure, and contract changes.
CCTP Migration
Transition from Bridged USDC to Native USDC via Circle's CCTP.
Non-EVM and Prefills
Support non-EVM chains and deterministic relay hashes for prefills.
BNB Smart Chain
Enable BNB Smart Chain (Chain ID 56) bridging for USDC, USDT, and ETH.