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. L1 vs L2 diff
10. 10. Customization
11. 11. Sharding
12. 12. Stacks review
13. 1. 12.1. Orbit stack