Arcscan could not produce the state changes for this transaction.
A state diff is the balances, nonces and storage slots a transaction changed. Arcscan stores none: it produces one by re-running the transaction against the account state as it stood before its block, and for this view that could not be done — so nothing is listed. That is a gap in Arcscan's coverage, not a statement that this transaction changed nothing. What the receipt records is unaffected: the event logs, and every value movement they carry. Where Arcscan knows why, the reason is stated below.
What the API said
Arcscan asked the endpoint it reads this chain from for the tracing calls a state diff is re-run with, and that endpoint refuses them. The state changes themselves happened and are final on-chain; Arcscan simply has no way to reconstruct them here.
Gas on Arc is paid in USDC, and the same dollars are visible in two places: as a native value with 18 decimals, and through the ERC-20 USDC interface with 6 decimals. A precompile keeps the two representations at parity, so this page counts each movement once instead of summing them. Read more