The four V4 swap actions are read only as the structs deployed on mainnet
and Sepolia. ethers read the newer v4-periphery structs, which add
minHopPriceX36, as the deployed ones, and the newer multi-hop exact-in
struct showed the offset of its hop-price array as the swap amount. A
decode now counts only when encoding it again gives back the same bytes.
A swap action that fails that marks its step "V4 Swap (could not be
decoded)", and a side its SETTLE or TAKE did not name reads "Unknown
(could not be decoded)". The wait and error screens no longer show the
ETH value as the amount of a swap whose amount was not read, unless the
swap is paid in native ETH.
Model: opus-5-5
tokenInfo(null) yielded "ETH (native)", so a swap whose input token the calldata never named was asserted to the user as ETH. The determination established for the output side in #353 applies unchanged: Currency is a value type over address, so native ETH arrives as the truthy zero-address string and WRAP_ETH sets it explicitly -- null can only mean undetermined.
The rule now lives in tokenInfo() itself rather than at each call site, so the redundant output-side guard added by #356 is removed; both sides read one UNNAMED_CURRENCY constant and cannot drift. Verified by execution that a genuine native-ETH input still renders as ETH, including via WRAP_ETH and a V4 zero-address PoolKey, and that the real mainnet output-side fixture is unchanged.
clawbot