56326 sc insight variable could be immutable

Submitted on Oct 14th 2025 at 16:18:58 UTC by @PotEater for Audit Comp | Alchemix V3

• Report ID: #56326

• Report Type: Smart Contract

• Report severity: Insight

• Target: https://github.com/alchemix-finance/v3-poc/blob/immunefi_audit/src/AlchemistV3Position.sol

• Impacts:

Description

Brief/Intro

In the AlchemistV3Position.sol contract, the declared variable alchemist could be immutable. This would significantly save on gas costs during contract initialization and also during contract interactions.

Vulnerability Details

The variable alchemist could be set as immutable. This would save on gas costs ~2,100 gas per call, this variable is used in the onlyAlchemist modifier. This modifier is used a lot in this contract.

    address public alchemist;

Setting this variable to immutable would save gas costs because immutable variables cost less gas when interacted with, because they are not taken from the contract's storage.

Impact Details

This is a code optimization..

This will save ~2,100 gas per interaction with this variable.

References

https://github.com/alchemix-finance/v3-poc/blob/b2e2aba046c36ff5e1db6f40f399e93cd2bdaad0/src/AlchemistV3Position.sol#L20

Proof of Concept

Proof of Concept

Setting variable to immutable saves gas, because the contract will not have to read from the contract storage when interacting with this variable.

This saves ~2,100 gas per call.