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keyBoard/Class/Pay/StoreKit2Manager/KBStoreKitBridge.swift

@@ -52,7 +52,7 @@ final class KBStoreKitBridge: NSObject, StoreKitDelegate {
             do {
                 try await self.manager.purchase(productId: productId)
                 
-                if let payload = await Self.latestJWSPayload(for: productId) {
+                if let payload = await self.fetchPayload(for: productId) {
                     self.verifySignedPayload(payload, completion: completion)
                 } else {
                     await MainActor.run {
@@ -115,10 +115,24 @@ final class KBStoreKitBridge: NSObject, StoreKitDelegate {
         }
     }
     
-    private static func latestJWSPayload(for productId: String) async -> String? {
-        guard let result = await Transaction.latest(for: productId) else { return nil }
-        if case .verified = result {
-            return result.jwsRepresentation
+    @MainActor
+    private func fetchPayload(for productId: String) async -> String? {
+        if let payload = manager.consumeRecentPayload(for: productId) {
+            return payload
+        }
+        return await Self.latestJWSPayload(for: productId, retryCount: 3)
+    }
+    
+    private static func latestJWSPayload(for productId: String, retryCount: Int = 1) async -> String? {
+        var attempts = 0
+        while attempts < retryCount {
+            if let result = await Transaction.latest(for: productId), case .verified = result {
+                return result.jwsRepresentation
+            }
+            attempts += 1
+            if attempts < retryCount {
+                try? await Task.sleep(nanoseconds: 300_000_000) // 0.3s
+            }
         }
         return nil
     }