@shopify/graphql-client/src/api-client-utilities/operation-types.ts

Shopify GraphQL Client - A lightweight generic GraphQL JS client to interact with Shopify GraphQL APIs

export type InputMaybe<_R = never> = never;

export interface AllOperations {
  [key: string]: {variables: any; return: any};
  [key: number | symbol]: never;
}

type UnpackedInput<InputType> = 'input' extends keyof InputType
  ? InputType['input']
  : InputType;

type UnpackedInputMaybe<InputType> =
  InputType extends InputMaybe<infer R>
    ? InputMaybe<UnpackedInput<R>>
    : UnpackedInput<InputType>;

export type OperationVariables<
  Operation extends keyof Operations,
  Operations extends AllOperations,
> =
  Operations[Operation]['variables'] extends Record<string, never>
    ? Record<string, never>
    : {
        variables?: {
          [k in keyof Operations[Operation]['variables']]: UnpackedInputMaybe<
            Operations[Operation]['variables'][k]
          >;
        };
      };

export type ResponseWithType<T = any> = Omit<Response, 'json'> & {
  json: () => Promise<T>;
};

export type ReturnData<
  Operation extends keyof Operations,
  Operations extends AllOperations,
> = Operation extends keyof Operations ? Operations[Operation]['return'] : any;