Submission Details
Severity:
Use assembly to check for `address(0)`
Summary
Using Ethereum's inline assembly can save gas when checking for the zero address.
Tools Used
Manual review
Recommendations
Use assembly for zero address checks
if (address(tokenContract) == address(0)) revert Escrow__TokenZeroAddress();
if (buyer == address(0)) revert Escrow__BuyerZeroAddress();
if (seller == address(0)) revert Escrow__SellerZeroAddress();
if (i_arbiter == address(0)) revert Escrow__DisputeRequiresArbiter();
Example of inline assembly check
assembly {
if iszero(seller) {
let ptr := mload(0x40)
mstore(ptr, 0x1122334400000000000000000000000000000000000000000000000000000000) // set selector for `Escrow__SellerZeroAddress()`
revert(ptr, 0x4) // Revert with the error selector
}
}
Prize pool breakdown
Total prize
40,000 USDC
nSLOC
186215 USDC / LOC
37,000 USDC
3,000 USDC
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