Incorrect function paramter for GetTransactionHistory in API

[erikd234]

Title
Discrepancy in PathTransactionHistory URL vs. Apple’s Documentation caused me great confusion

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Description
Currently, GOIAP uses:

PathTransactionHistory = "/inApps/v2/history/{originalTransactionId}"

However, according to Apple’s documentation ([Get Transaction History](https://developer.apple.com/documentation/appstoreserverapi/get_transaction_history)), the path parameter {transactionId} need not be the original transaction ID. It can be any valid transaction ID—including the most recent one—to retrieve the full transaction history.

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Suggested Improvements

1. Change the parameter name: Rename PathTransactionHistory to use transactionId instead of originalTransactionId, e.g.:

   PathTransactionHistory = "/inApps/v2/history/{transactionId}"

2. Clarify usage: Update documentation and function signature (e.g., rename GetTransactionHistory(ctx context.Context, originalTransactionId string, ...)) so it is explicit that the latest transaction ID should be passed if the caller wants a full transaction history.

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Additional Context

• Apple’s official docs: [Get Transaction History](https://developer.apple.com/documentation/appstoreserverapi/get_transaction_history)

[richzw]

@erikd234 , Thank you very for your question. The function signature has been updated in the latest version. Please let me know if something incorrect.