Dojo System Generation

Create Dojo systems (smart contracts) that implement your game's logic and modify model state.

Essential Imports (Dojo 1.0+)

Copy these imports for any Dojo system:

// Core Dojo imports - ALWAYS needed for systems
use dojo::model::{ModelStorage, ModelValueStorage};
use dojo::event::EventStorage;

// Starknet essentials
use starknet::{ContractAddress, get_caller_address, get_block_timestamp};

Where does self.world_default() come from?