Blockchain and smart-contract assessment: reentrancy, access control, oracle and arithmetic flaws, signature replay, and Web3 front-end risks.
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Core smart-contract bug classes: reentrancy, access control, arithmetic, and broken business logic.
Economic and protocol-level attacks: oracle manipulation, flash loans, MEV, and token-standard edge cases.
Language- and EVM-level footguns: delegatecall/proxy storage, low-level calls, signatures, and randomness.
Client-side and wallet-facing risks: approval/permit phishing, blind signing, contract-address trust, and key handling.
Operational surface: exposed RPC endpoints and cross-chain bridge / consensus risks.