Boss: Scaling the world computer

What you get asked

1. Boss round. Why does every action on Ethereum cost gas?

   Thousands of machines do the work, gas pays for it, and junk traffic prices itself out. Total fee = gas used × gas price.

2. State the blockchain trilemma in one line.

   The tension behind everything in this league: bigger blocks, rollups, alt-L1s and app-chains are all different ways of leaning into it.

3. Trace funds through an optimistic rollup, start to exit

   Execute upstairs, settle downstairs, and give fraud proofs time to speak before money leaves: the whole optimistic design in four steps.

4. A swap costs €15.00 on Ethereum L1 and €0.30 on a rollup. How many times cheaper is the rollup?

   15 ÷ 0.30 = 50×. Batching spreads one L1 fee across thousands of users. That arithmetic is why activity moved to L2s.

5. Match each league-2 term to its meaning

   Standards, rollups, bridge risk, chain architecture: one card from each corner of the league.

6. Final question. What's the deepest lesson of scaling the world computer?

   No free lunches, only tradeoffs, honestly weighed. You just scaled the world computer, champion. League 3 awaits. 🐜

The rest of this unit

Alt-L1s, bridge hacks, and the honest fight over crypto's endgame.

• Alt-L1s
• Bridge risk
• Choosing a chain
• The interop future