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Migration Guides

Migration Guides

Step-by-step migration references for upgrading your Across integration.

Available Migrations

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.

Crosschain Deposit into Aave

Bridge USDC from Arbitrum, swap to ETH on Ethereum, and deposit into Aave's lending pool — in a single transaction.

Solana Migration Guide

Prepare for USDC bridging on Solana — API changes, deposit flow, and relayer requirements.

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Available Migrations