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Starknet Core Contract components in Cairo.

The different tasks of the Starknet Core Contract are here mapped to what we can call an "Appchain" Core Contract.

The functionalities of the core contract are split over several components. Each component is usually placed into a directory, event if it is simple. Doing so allow a good separation of additional files that may be written in the context of a component.

Due to a limitation of starknet foundry, we can't declare a contract that is defined under the tests directory. For this reason, mock contract are defined in their respective component location. This is also a good way for the component write to illustrate the minimum required to use the component.

• appchain.cairo: core contract of the appchain on Starknet.

• config: base configuration for the core contract.

• messaging: messaging between Appchain - Starknet.

To build the project, run:

scarb build

To test the project, run:

snforge test

• Use snake_case for module name and not PascalCase.

• Don't import directly a function from a module.

// Prefer that:
let addr = starknet::contract_address_const::<0>();

// Instead of:
use starknet::contract_address_const;
let addr = contract_address_const::<0>();

• Document functions inside the trait, and add details if needed in the implementation.