payment: introduce constant for duplicate idempotency key error (#211)

i-love-flamingo · Apr 7, 2020 · 2fc8b89 · 2fc8b89
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -45,6 +45,9 @@
 * product attributes:
   * Added `AttributesByKey` domain method to filter attributes by key and exposed this method as `getAttributesByKey` in GraphQL
   * GraphQL: Exposing `codeLabel` property in the `Commerce_ProductAttribute` type
+
+**payment**
+* Introduced error message for already used idempotency key 
 
 ## v3.1.0
 **tests**

diff --git a/payment/domain/payment.go b/payment/domain/payment.go
@@ -54,16 +54,18 @@ type (
 )
 
 const (
-	// PaymentErrorCodeFailed error
+	// PaymentErrorCodeFailed error will be returned when a general error occurred
 	PaymentErrorCodeFailed = "failed"
-	// PaymentErrorCodeAuthorizeFailed error
+	// PaymentErrorCodeAuthorizeFailed error will be returned when the authorization failed
 	PaymentErrorCodeAuthorizeFailed = "authorization_failed"
-	// PaymentErrorCodeCaptureFailed error
+	// PaymentErrorCodeCaptureFailed error will be returned when capturing failed
 	PaymentErrorCodeCaptureFailed = "capture_failed"
-	// PaymentErrorAbortedByCustomer error
+	// PaymentErrorAbortedByCustomer error will be returned when the payment will be aborted by the customer
 	PaymentErrorAbortedByCustomer = "aborted_by_customer"
-	// PaymentErrorCodeCancelled error
+	// PaymentErrorCodeCancelled error will be returned when the payment will be canceled
 	PaymentErrorCodeCancelled = "cancelled"
+	// PaymentErrorDuplicateIdempotencyKey error will be returned when idempotency key already in use
+	PaymentErrorDuplicateIdempotencyKey = "duplicate_idempotency_key"
 
 	// PaymentFlowStatusUnapproved payment started
 	PaymentFlowStatusUnapproved = "payment_unapproved"