QA Report

[code423n4]

Title: Set amount to 1, to minimize error
https://github.com/code-423n4/2022-05-opensea-seaport/blob/main/contracts/lib/Executor.sol#L81

we can set this value constantly as 1, there is no need that this value should be dynamically set, since the _transferERC721() will check if the amount value is 1, and we can remove this check to make it cheaper overall

[0age]

using a constant here, and not the actual value, introduces a vulnerability where a single 721 is transferred but multiple items are expected

[HardlyDifficult]

Merging with #190

Reopening as with this there is now 1 valid low.