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Ethereum, Smart Contracts and Token Standards

Four original lessons focused on cryptocurrency systems, research and safety.

1. Ethereum Accounts, Gas and Transaction Execution
2. ERC-20 Tokens: Transfers, Allowances and Risks
3. Smart Contract Audits: What They Do and Do Not Prove
4. Ethereum Layer 2 Rollups and Withdrawal Risks

Study the explanations and complete each practice exercise using public data or fictional examples. Never share wallet recovery secrets.