“At most” value display can slightly understate the actual maximum #11

The ETH formatter truncates to six decimal places, while the UI labels the displayed amount as “at most.” The exact transaction value can therefore be slightly greater than the displayed number—by less than 0.000001 ETH. The 2% buffer calculation also rounds downward by up to one wei.

Use one of these alternatives:

round the displayed maximum upward
display more decimal places
say “approximately”
show the exact amount in an expandable transaction-details section

The wallet confirmation still displays the actual transaction value, so this is primarily a precision and trust issue.