1. 1. Introduction
2. 2. The EXECUTE precompile
3. 3. Tech dependencies
4. 4. L1 Anchoring
5. 5. L1 to L2 messaging
6. 6. L2 to L1 messaging
7. 7. Gas token deposits
8. 8. L2 fee market
9. 9. Forced transactions
10. 10. L1 vs L2 diff
11. 11. Open problems
12. 12. Customization
13. 13. Proofs
14. 14. Sharding
15. 15. Stacks review
16. 1. 15.1. Orbit stack