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. Sharding
14. 14. Stacks review
15. 1. 14.1. Orbit stack