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Submission Details
Severity: low
Invalid

Absence of gas optimization strategies within `vaults` function loops might result in transactions failing or incurring high gas costs.

0xVinylDavyl

Summary:

The presence of loops in functions, such as the vaults function in the SmartVaultManagerV5 contract, leads to a potential gas limit issues. Handling large arrays of accepted tokens within loops may make certain functions susceptible to hitting gas limits, impacting the successful execution of transactions.

Vulnerability Details:

The vaults function and other functions containing loops in the SmartVaultManagerV5 contract could be susceptible to hitting gas limits. The absence of gas optimization strategies within these loops might result in transactions failing or incurring high gas costs.

function vaults() external view returns (SmartVaultData[] memory) {
uint256[] memory tokenIds = smartVaultIndex.getTokenIds(msg.sender);
uint256 idsLength = tokenIds.length;
SmartVaultData[] memory vaultData = new SmartVaultData[](idsLength);
for (uint256 i = 0; i < idsLength; i++) {
uint256 tokenId = tokenIds[i];
vaultData[i] = SmartVaultData({
tokenId: tokenId,
collateralRate: collateralRate,
mintFeeRate: mintFeeRate,
burnFeeRate: burnFeeRate,
status: ISmartVault(smartVaultIndex.getVaultAddress(tokenId)).status()
});
}
return vaultData;
}

In this snippet, notice the vaults function contains a loop that iterates over an array of tokenIds. Each iteration involves querying information from the smartVaultIndex and constructing instances of SmartVaultData. The absence of gas optimization strategies within this loop may make it susceptible to hitting gas limits, especially when dealing with potentially large arrays of accepted tokens.

Impact:

Transactions involving functions with loops would fail due to hitting gas limits, leading to unexpected behavior and potential disruptions in the contract's functionality.

Tools Used:

  • Manual Code Review

Recommendations:

Optimize gas usage by employing gas-efficient coding patterns, especially within functions containing loops. Consider breaking down large loops into smaller batches to mitigate gas limit issues and improve the overall efficiency of transaction execution.

The recommended optimization involves breaking down the loop into smaller batches to improve gas efficiency and minimize the risk of hitting gas limits.

// Original code with loop
function vaults() external view returns (SmartVaultData[] memory) {
uint256[] memory tokenIds = smartVaultIndex.getTokenIds(msg.sender);
uint256 idsLength = tokenIds.length;
SmartVaultData[] memory vaultData = new SmartVaultData[](idsLength);
for (uint256 i = 0; i < idsLength; i++) {
// Loop logic...
}
return vaultData;
}
// Recommended optimization with batch processing
function vaults() external view returns (SmartVaultData[] memory) {
uint256[] memory tokenIds = smartVaultIndex.getTokenIds(msg.sender);
uint256 idsLength = tokenIds.length;
SmartVaultData[] memory vaultData = new SmartVaultData[](idsLength);
// Process tokens in smaller batches
for (uint256 start = 0; start < idsLength; start += BATCH_SIZE) {
uint256 end = start + BATCH_SIZE;
if (end > idsLength) {
end = idsLength;
}
​
for (uint256 i = start; i < end; i++) {
// Batch processing logic...
}
}
​
return vaultData;
}
Updates

Lead Judging Commences

hrishibhat Lead Judge over 1 year ago
Submission Judgement Published
Invalidated
Reason: Non-acceptable severity
Assigned finding tags:

informational/invalid

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