clawbot 28a527295a harden: state an undetermined V4 output token as undetermined, not as ETH (closes #353) ...

A V4 swap could set minOutput while leaving outputToken null, and tokenInfo(null) returned ETH at 18 decimals, so the approval screen named an asset the calldata never stated. Established from the V4 encoding that this is wrong rather than protocol semantics: Currency is a user-defined value type over address, so native ETH arrives as the truthy zero-address string and is already mapped to ETH, and an UNWRAP_WETH output is caught earlier — both genuine native-ETH routes are covered without null, so null can only mean no sub-action yielded a currency. A genuine native-ETH V4 swap still renders as ETH, pinned by test against the real mainnet fixture.

The same gate also let a later step overwrite minOutput while an earlier hop's outputToken stayed on screen, showing a figure against the wrong token. Fixed together as the same two lines and the same defect.

2026-08-23 18:13:20 +02:00

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