Snapshot returned by retrieveRefund — refundPayment can come back "pending" (async refunds), and this is how the host polls it to a terminal state.
Optional
ISO 8601, when known.
The PSP payment the refund belongs to, when the PSP reports it.
Snapshot returned by retrieveRefund — refundPayment can come back "pending" (async refunds), and this is how the host polls it to a terminal state.