How to Audit a Smart Contract Like a Pro (Complete Guide + Tools)
Mindset
Assume malicious. Every external call is a trap. Every variable is tainted.
Static Analysis
Slither (100+ detectors), Mythril (symbolic), Solhint (style). Run in CI.
Fuzzing
Foundry: forge test --fuzz-runs 10000. Echidna: invariant testing. 1M runs = confidence.
Invariants
"Total supply never exceeds mint cap." "User balance never negative." Automate these.
Manual Review
Reentrancy, access control, oracle manipulation, precision, upgradeability. Checklist attached.
Bounty Platforms
Code4rena, Sherlock, Immunefi. $10K-$1M per critical bug. Build reputation first.
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