Fix Foundry Snapshot Errors

You will learn how to create and compare gas snapshots to prevent gas regressions.

The Problem

The foundry forge snapshot pattern is frequently misapplied in smart contract and dapp development, leading to vulnerabilities, gas inefficiencies, or logic errors. This guide shows the correct implementation and common pitfalls to avoid.

Quick Fix

Wrong

// No gas tracking
forge test

Can't tell if a commit accidentally increased gas costs.

Right

forge snapshot  # Creates .gas-snapshot
forge snapshot --diff  # Shows changes from last snapshot

Gas snapshot tracks per-function gas costs. CI can fail if gas increases beyond threshold.

Prevention

• Create snapshots for every commit in CI
• Use --diff flag in PR checks
• Set gas increase threshold in git hooks
• Use DodaTech's snapshot comparison tool
• Review gas changes in pull requests

DodaTech Tools

Built by the developers of Doda Browser, DodaZIP, and Durga Antivirus Pro. Doda Browser's developer tools include a Solidity debugger and transaction inspector. DodaZIP archives secure contract templates for team collaboration. Durga Antivirus Pro scans deployed contracts for known vulnerability signatures.

FAQ