OneKey State Management

Jotai Atom Organization - MANDATORY STRUCTURE

Global State Atoms (for app-wide, persistent state)

• Location: packages/kit-bg/src/states/jotai/atoms/
• Usage: Global settings, account state, hardware state, currency, etc.
• Pattern: Use globalAtom and EAtomNames for standardization
• Examples: settings.ts, account.ts, hardware.ts, currency.ts

Feature-Specific State Atoms (for localized functionality)

• Location: packages/kit/src/states/jotai/contexts/[feature_name]/atoms.ts
• Usage: Feature-specific state that may be shared across components within that feature
• Pattern: Use contextAtom from createJotaiContext for consistency
• Structure:

  contexts/
  ├── marketV2/
  │   ├── atoms.ts     - State definitions
  │   ├── actions.ts   - State operations
  │   └── index.ts     - Exports
  ├── swap/
  │   ├── atoms.ts
  │   ├── actions.ts
  │   └── index.ts

FORBIDDEN Atom Patterns

• ❌ NEVER create atom directories under packages/kit/src/views/
• ❌ NEVER create standalone atom files in component directories
• ❌ NEVER mix globalAtom and contextAtom patterns without architectural justification

Atom Selection Guidelines

Use globalAtom when:

• State needs persistence across app restarts
• State is used across multiple major features
• State affects the entire application (settings, authentication, etc.)
• Located in packages/kit-bg/src/states/jotai/atoms/

Use contextAtom when:

• State is specific to a feature or module
• State is temporary/session-based
• State is shared within related components of a feature
• Located in packages/kit/src/states/jotai/contexts/[name]/atoms.ts

IMPORTANT: These are the ONLY two atom patterns used in the project. Do not create custom atom patterns or use plain Jotai atoms outside of these established structures.

Common Patterns

Creating a Global Atom

// packages/kit-bg/src/states/jotai/atoms/myFeature.ts
import { globalAtom } from '../utils';
import { EAtomNames } from '../atomNames';

export const myFeatureAtom = globalAtom<MyFeatureState>({
  name: EAtomNames.myFeature,
  initialValue: { /* initial state */ },
  persist: true, // if persistence needed
});

Creating a Context Atom

// packages/kit/src/states/jotai/contexts/myFeature/atoms.ts
import { createJotaiContext } from '../../utils';

const { contextAtom, useContextAtom } = createJotaiContext();

export const myFeatureDataAtom = contextAtom<MyData | null>(null);

// Export hook for components
export { useContextAtom };

Using Atoms in Components

import { useAtom, useAtomValue, useSetAtom } from 'jotai';
import { myFeatureAtom } from '@onekeyhq/kit-bg/src/states/jotai/atoms';

function MyComponent() {
  // Read and write
  const [value, setValue] = useAtom(myFeatureAtom);

  // Read only
  const value = useAtomValue(myFeatureAtom);

  // Write only
  const setValue = useSetAtom(myFeatureAtom);
}