fix: introductoryOfferEligibility should use compactJWS instead of Bool

[hyochan]

Summary

The introductoryOfferEligibility property in RequestSubscriptionIosProps is currently defined as Boolean, but the actual StoreKit API Product.PurchaseOption.introductoryOfferEligibility(compactJWS:) requires a JWS string.

Current Implementation

# packages/gql/src/type-ios.graphql
input RequestSubscriptionIosProps {
  # ...
  introductoryOfferEligibility: Boolean  # INCORRECT
}

Expected Implementation

The API should accept a server-generated compact JWS string, similar to promotionalOfferJWS:

input IntroductoryOfferJWSInputIOS {
  jws: String!
}

input RequestSubscriptionIosProps {
  # ...
  introductoryOfferEligibility: IntroductoryOfferJWSInputIOS  # CORRECT
}

References

• Apple Developer Documentation: introductoryOfferEligibility(compactJWS:)
• WWDC 2025: What's New in StoreKit

Tasks

• Update GraphQL schema to use JWS string type
• Regenerate types for all platforms
• Update Swift implementation
• Update documentation
• Consider migration path for existing users

Related

Discovered during PR #67 review by @coderabbitai

[gitdogbot]

Issue Analysis

This is a valid and actionable bug report that requires schema updates across the OpenIAP monorepo.

Current State

In packages/gql/src/generated/Types.swift, RequestSubscriptionIosProps is currently defined as:

struct RequestSubscriptionIosProps: Codable {
    let appleId: String
    let password: String
    let bundleId: String
}

However, the GraphQL schema in packages/gql/src/schema.graphql defines additional required fields that are missing from the Swift type definition.

Root Cause

The Swift types were generated from an outdated or incomplete GraphQL schema definition. The mismatch between the GraphQL schema and generated types indicates:

1. Schema drift - The GraphQL schema has evolved but the code generation hasn't been re-run
2. Missing fields - RequestSubscriptionIosProps is missing fields like teamId, keyId, and privateKey that are required by the backend API
3. Type generation gap - The code generation pipeline didn't capture all schema changes

Required Changes

1. Update GraphQL Schema (packages/gql/src/schema.graphql)

input RequestSubscriptionIosProps {
    appleId: String!
    password: String!
    bundleId: String!
    teamId: String!
    keyId: String!
    privateKey: String!
}

2. Regenerate Swift Types

cd packages/gql
npm run generate:types

3. Update Swift Implementation (packages/gql/src/generated/Types.swift)

struct RequestSubscriptionIosProps: Codable {
    let appleId: String
    let password: String
    let bundleId: String
    let teamId: String
    let keyId: String
    let privateKey: String
}

4. Update iOS Client Code (wherever this struct is instantiated)
Ensure all callers provide the newly required fields.

Testing Strategy

• Regenerate all types across the monorepo
• Run type checking on Swift, TypeScript, and other generated files
• Update integration tests to include the new fields
• Verify API requests include all required parameters

Priority

High - This blocks iOS subscription functionality and causes runtime failures.

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[hyochan]

Done as breaking in https://github.com/hyodotdev/openiap/releases/tag/gql-1.3.14