JohnnyTime 🤓🔥

Smart contract security pays WELL.
💰 Top auditors make $500K+ per year
💰 Bug bounties can 10x that
💰 Even “mid” auditors make six figures

BUT… Only if you actually put in the work. No shortcuts here.

New SCH CTF Arena challenge: Dex Two.

Worth 900 EXP and up to 1350 HP.

smartcontractshacking.com/tools/web3-ctf…

Signature review: what binds this approval to its chain, contract and action?

Then check nonce consumption and expiry. EIP-712 domain separation helps define context; the application still needs replay protection.

In this unchecked arithmetic example, increasing lockTime wraps it to zero and bypasses the waiting period.

For a reproducible portfolio finding, include:

Repo + commit
Affected function
Starting state
Attacker prerequisites
Reproduction command
Expected result
Impact

Use an authorized target. Label training examples honestly.