Reducer Interface Example

interfaces.ts

export interface Bucket {
  notes: string;
  id?: string;
}

export interface UpdateNotesPayload {
  targetIndex: number;
  value: string;
}

export interface UpdateNotesAction {
  type: 'updateNotes';
  payload: UpdateNotesPayload;
}

export interface AddAction {
  type: 'addBucket';
}

export type Action =
  | AddAction
  | UpdateNotesAction;

export interface State {
  buckets: Bucket[];
}