Types

The expo-iap type surface is now generated in one place: src/types.ts. The file is produced by our GraphQL schema and represents the canonical source for all product, purchase, subscription, and request shapes. After updating any schema definitions, run bun run generate:types to refresh the file.

Key runtime helpers that build on these types live alongside them:

• src/types.ts – auto-generated enums and interfaces
• src/utils/errorMapping.ts – typed error helpers (createPurchaseError, ErrorCodeUtils)
• src/helpers/subscription.ts – subscription utilities that re-export ActiveSubscription

Below is a curated overview of the most commonly used types. Consult src/types.ts for the full schema.

Core Type Aliases

export type IapPlatform = 'android' | 'ios';

export type ProductType = 'in-app' | 'subs';

export type PurchaseState =
  | 'deferred'
  | 'failed'
  | 'pending'
  | 'purchased'
  | 'restored'
  | 'unknown';

The ErrorCode enum now mirrors the OpenIAP schema without the legacy E_ prefix:

export enum ErrorCode {
  ActivityUnavailable = 'ACTIVITY_UNAVAILABLE',
  AlreadyOwned = 'ALREADY_OWNED',
  ...
  Unknown = 'UNKNOWN',
  UserCancelled = 'USER_CANCELLED',
  UserError = 'USER_ERROR',
}

Use createPurchaseError from src/utils/errorMapping.ts to work with typed errors and platform mappings.

Product Types

All products share the generated ProductCommon interface. Platform extensions discriminate on the platform field via the IapPlatform string union.

export interface ProductCommon {
  id: string;
  title: string;
  description: string;
  type: ProductType;
  displayName?: string | null;
  displayPrice: string;
  currency: string;
  price?: number | null;
  platform: IapPlatform;
}

export interface ProductAndroid extends ProductCommon {
  nameAndroid: string;
  oneTimePurchaseOfferDetailsAndroid?: ProductAndroidOneTimePurchaseOfferDetail | null;
  subscriptionOfferDetailsAndroid?:
    | ProductSubscriptionAndroidOfferDetails[]
    | null;
}

export interface ProductIOS extends ProductCommon {
  displayNameIOS: string;
  isFamilyShareableIOS: boolean;
  jsonRepresentationIOS: string;
  typeIOS: ProductTypeIOS;
  subscriptionInfoIOS?: SubscriptionInfoIOS | null;
}

export type Product = ProductAndroid | ProductIOS;
export type ProductSubscription =
  | ProductSubscriptionAndroid
  | ProductSubscriptionIOS;

Purchase Types

Purchases share the PurchaseCommon shape and discriminate on the same platform union. Both variants expose the unified purchaseToken field for server validation.

export interface PurchaseCommon {
  id: string;
  productId: string;
  platform: IapPlatform;
  purchaseState: PurchaseState;
  transactionDate: number;
  quantity: number;
  isAutoRenewing: boolean;
  purchaseToken?: string | null;
  ids?: string[] | null;
}

export interface PurchaseAndroid extends PurchaseCommon {
  autoRenewingAndroid?: boolean | null;
  packageNameAndroid?: string | null;
  signatureAndroid?: string | null;
  dataAndroid?: string | null;
}

export interface PurchaseIOS extends PurchaseCommon {
  appAccountToken?: string | null;
  environmentIOS?: string | null;
  expirationDateIOS?: number | null;
  originalTransactionIdentifierIOS?: string | null;
  offerIOS?: PurchaseOfferIOS | null;
}

export type Purchase = PurchaseAndroid | PurchaseIOS;

Active Subscriptions

ActiveSubscription is now part of the generated schema and shared across helpers.

export interface ActiveSubscription {
  productId: string;
  isActive: boolean;
  transactionId: string;
  transactionDate: number;
  purchaseToken?: string | null;
  autoRenewingAndroid?: boolean | null;
  environmentIOS?: string | null;
  expirationDateIOS?: number | null;
  daysUntilExpirationIOS?: number | null;
  willExpireSoon?: boolean | null;
}

The helper getActiveSubscriptions in src/helpers/subscription.ts converts Purchase records into this shape and re-exports the type for convenience.

Request Parameters

The request types have been harmonised to match the schema definitions.

export interface RequestPurchasePropsByPlatforms {
  android?: RequestPurchaseAndroidProps | null;
  ios?: RequestPurchaseIosProps | null;
}

export interface RequestSubscriptionPropsByPlatforms {
  android?: RequestSubscriptionAndroidProps | null;
  ios?: RequestSubscriptionIosProps | null;
}

export type MutationRequestPurchaseArgs =
  | {
      request: RequestPurchasePropsByPlatforms;
      type: 'in-app';
    }
  | {
      request: RequestSubscriptionPropsByPlatforms;
      type: 'subs';
    };

Receipt Validation

Receipt validation results are platform-specific unions:

export type ReceiptValidationResult =
  | ReceiptValidationResultAndroid
  | ReceiptValidationResultIos;

Use the higher-level validateReceipt helper exported from src/index.ts for a strongly typed wrapper around the native modules.

Where to Find Everything

• For the exhaustive list of enums and interfaces, open src/types.ts.
• For error handling utilities (createPurchaseError, ErrorCodeUtils), use src/utils/errorMapping.ts.
• All generated types are re-exported from the package root so consumers can import from expo-iap directly:

import type {
  Product,
  Purchase,
  ActiveSubscription,
  RequestPurchaseProps,
} from 'expo-iap';

If you need to regenerate types place new schema definitions under the GraphQL inputs and rerun the generator. EOF