2. AgentPay Introduction
3. 1. Background & Overview
5. AgentPay Architecture
6. 2. System Overview
7. 3. On-Chain Contracts
   1. 3.1. Core Data Structures
   2. 3.2. Contracts Architecture
   3. 3.3. Channel Operations
   4. 3.4. Decentralized Versioning
8. 4. Off-Chain Protocols
   1. 4.1. Single-Hop Protocols
   2. 4.2. End-to-End Protocols
9. 5. App Contracts and Protocols
11. State Guardian Network
12. 6. Off-Chain Availability Problem
13. 7. Evolution of SGN
14. 8. SGN as Channel Guardian