Transaction 对象
transactionIdentifier
string - 成功加入队列的事务的唯一标识transactionDate
string - 事务被加入队列的时间originalTransactionIdentifier
string - App Store恢复的事务的标识符transactionState
string - 事务状态, 可以是purchasing
,purchased
,failed
,restored
或deferred
.errorCode
Integer - 处理事务时发生错误时的错误代码。errorMessage
string - 处理事务时发生错误时的错误消息。payment
ObjectproductIdentifier
string - 购买产品的标识符。quantity
Integer - 购买数量。applicationUsername
string - 系统上不透明的用户帐户标识符。paymentDiscount
PaymentDiscount (optional) - The details of the discount offer to apply to the payment.