A beginner's walkthrough of building a pay-as-you-go smart contract system in Solidity. Covers core concepts like state management with mappings and structs, payment handling with msg.sender and msg.value, inheritance patterns for reusable contract design, and safety practices like the CEI pattern and require() validation.
Table of contents
The PAYG ConceptA Quick Note on AddressesContract Design: Base Contract with InheritancePayAsYouGoBase: The Foundation1. State Variables2. Registering a Service3. Using a Service4. Withdrawing EarningsExtending for Different Service TypesSort: