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Delivered when a refund is completed, fails, or is cancelled. Excludes POS terminal voids, which are delivered under POS_PAYMENT_STATUS.
V2 Webhook Signing: If you have enabled V2 webhook signing, the signatureHash field is removed from the payload and an eventType field is added. The webhook signature is delivered in the X-Atoa-Signature HTTP header instead.
For V1 signing, signatureHash is computed from orderId and refundId — see the V1 Signing guide. With V2 signing enabled, signatureHash is removed and replaced by the X-Atoa-Signature header.
Only present when metadata was supplied on the refund. See Initiate Refund for the field limits.