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Challenge 2 - Spot Price From Reserves
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Challenge 2: Spot Price From Reserves

A CPMM does not store a price directly. The current spot price is implied by the reserve ratio.

Task

Implement spot_price_bps(x_reserve, y_reserve).

Requirements

  • Return the price of 1 unit of X in units of Y.
  • Scale the result by 10_000 so you can stay in integer math.
  • For x = 2_000 and y = 3_000, return 15_000.

That corresponds to:

3_000 / 2_000 = 1.5
1.5 * 10_000 = 15_000

Do multiplication before division when possible, or integer division will throw away precision too early.

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