refactored payment orchestration

api/gateway/mntx/storage/model/status.go

@@ -0,0 +1,13 @@
+package model
+
+type PayoutStatus string
+
+const (
+	PayoutStatusCreated    PayoutStatus = "created"    // record exists, not started
+	PayoutStatusProcessing PayoutStatus = "processing" // we are working on it
+	PayoutStatusWaiting    PayoutStatus = "waiting"    // waiting external world
+
+	PayoutStatusSuccess   PayoutStatus = "success"   // final success
+	PayoutStatusFailed    PayoutStatus = "failed"    // final failure
+	PayoutStatusCancelled PayoutStatus = "cancelled" // final cancelled
+)