BOLT12 receive (#882)

* Add BOLT12 receive payment handling

* Handle BOLT12 invoice requests via WS

* Fix invoice request subscription on stream initialisation

* Store the BOLT12 offer used to receive a payment

* Address review feedback

* Separate into create BOLT12 invoice fn

* Update all BOLT12 offers when webhook URL changes

* Deprecate Lightning for Bolt11Invoice

lib/bindings/langs/swift/Sources/BreezSDKLiquid/TaskProtocol.swift

@@ -59,3 +59,50 @@ extension TaskProtocol {
         }
     }
 }
+
+class ReplyableTask : TaskProtocol {
+    var payload: String
+    var contentHandler: ((UNNotificationContent) -> Void)?
+    var bestAttemptContent: UNMutableNotificationContent?
+    var logger: ServiceLogger
+    var successNotificationTitle: String
+    var failNotificationTitle: String
+    
+    init(payload: String, logger: ServiceLogger, contentHandler: ((UNNotificationContent) -> Void)? = nil, bestAttemptContent: UNMutableNotificationContent? = nil, successNotificationTitle: String, failNotificationTitle: String) {
+        self.payload = payload
+        self.contentHandler = contentHandler
+        self.bestAttemptContent = bestAttemptContent
+        self.logger = logger
+        self.successNotificationTitle = successNotificationTitle;
+        self.failNotificationTitle = failNotificationTitle;
+    }
+    
+    func start(liquidSDK: BindingLiquidSdk) throws {}
+
+    public func onEvent(e: SdkEvent) {}
+    
+    func onShutdown() {
+        displayPushNotification(title: self.failNotificationTitle, logger: self.logger, threadIdentifier: Constants.NOTIFICATION_THREAD_REPLACEABLE)
+    }
+    
+    func replyServer(encodable: Encodable, replyURL: String) {
+        guard let serverReplyURL = URL(string: replyURL) else {
+            self.displayPushNotification(title: self.failNotificationTitle, logger: self.logger, threadIdentifier: Constants.NOTIFICATION_THREAD_REPLACEABLE)
+            return
+        }
+        var request = URLRequest(url: serverReplyURL)
+        request.httpMethod = "POST"
+        request.httpBody = try! JSONEncoder().encode(encodable)
+        let task = URLSession.shared.dataTask(with: request) { data, response, error in
+            let statusCode = (response as! HTTPURLResponse).statusCode
+            
+            if statusCode == 200 {
+                self.displayPushNotification(title: self.successNotificationTitle, logger: self.logger, threadIdentifier: Constants.NOTIFICATION_THREAD_REPLACEABLE)
+            } else {
+                self.displayPushNotification(title: self.failNotificationTitle, logger: self.logger, threadIdentifier: Constants.NOTIFICATION_THREAD_REPLACEABLE)
+                return
+            }
+        }
+        task.resume()
+    }
+}