SMART CONTRACTS, DEFI & WEB3 SECURITY - Chapter 10, Exercise 3 Solution ========================================================== Redesigning SimpleStake and Its Shifted Regulatory Exposure PROBLEM ------- Redesign SimpleStake so it pays depositors a fixed yield, marketed with the promise that the development team will keep building features to grow returns. Using Chapter 9's own Howey Test material, explain how this specific change shifts the contract's own real regulatory exposure. SOLUTION -------- THE REDESIGN A modified version would add a rewards mechanism - for example, tracking how long each user's balance has been deposited and minting or transferring an additional yield token proportional to that time, paid out alongside the original deposit on withdrawal. The marketing copy in this exercise's own prompt explicitly promises that the development team will keep building features specifically to grow that return over time. APPLYING THE FOUR HOWEY PRONGS INVESTMENT OF MONEY: satisfied, exactly as in the original design - users are depositing a real asset (the ERC-20 token) to participate. COMMON ENTERPRISE: satisfied. Every depositor's own yield now depends on the same shared protocol and the same development team's own continued work, rather than each depositor pursuing an independent, unrelated outcome. EXPECTATION OF PROFIT: newly and clearly satisfied. The original SimpleStake design returned exactly what a user deposited, with no profit expectation at all. Adding a yield mechanism, explicitly marketed as growing over time, directly introduces a real expectation of profit that did not exist before. PROFIT DERIVED FROM THE EFFORTS OF OTHERS: also newly and clearly satisfied, and for the same reason Chapter 9's own hypothetical token pitch triggered this exact prong - the marketing explicitly attributes future returns to the development team's own continued work building new features, not to anything the depositor does themselves. WHY THIS SHIFT MATTERS The original SimpleStake design, returning exactly a user's own deposit with no yield and no promotional promise of value from anyone else's efforts, sat well clear of at least two of the four prongs. This redesigned version now maps onto all four prongs about as directly as Chapter 9's own hypothetical pitch did, making it a genuinely stronger real candidate for classification as an investment contract - and therefore a regulated security - under the actual Howey Test still applied today. ANSWER: Adding a marketed yield mechanism to SimpleStake, explicitly promising the development team will keep building features to grow returns, shifts the contract from satisfying only two of the four Howey prongs (investment of money, common enterprise) to satisfying all four - the promised growing yield introduces a genuine expectation of profit, and attributing that growth to the team's own continued work satisfies the "efforts of others" prong directly. This is a substantive real shift: the original no-yield design sat clear of security classification, while this redesigned version becomes a genuinely strong candidate for it under the exact same legal test. ---- WHY THIS WORKS AS AN ANSWER It works through all four Howey prongs individually for the redesigned contract, explicitly contrasts the result against the original no-yield design's own weaker exposure, and correctly identifies which specific design change (the marketed yield promise) is what shifts the real regulatory analysis.