Enabled throwing from custom invitation closure

Author: insidegui

Sources/MultipeerKit/Internal API/MultipeerConnection.swift

@@ -178,7 +178,7 @@ extension MultipeerConnection: MCNearbyServiceBrowserDelegate {
             case .automatic:
                 browser.invitePeer(peerID, to: session, withContext: nil, timeout: 10.0)
             case .custom(let inviter):
-                guard let invite = inviter(peer) else {
+                guard let invite = try inviter(peer) else {
                     os_log("Custom invite not sent for peer %@", log: self.log, type: .error, String(describing: peer))
                     return
                 }
@@ -221,7 +221,7 @@ extension MultipeerConnection: MCNearbyServiceAdvertiserDelegate {
 
         configuration.security.invitationHandler(peer, context, { [weak self] decision in
             guard let self = self else { return }
-            
+
             invitationHandler(decision, decision ? self.session : nil)
         })
     }

Sources/MultipeerKit/Public API/MultipeerConfiguration.swift

@@ -12,7 +12,7 @@ public struct MultipeerConfiguration {
         case automatic
         /// Use `.custom` when you want to control the invitation of new peers to your session,
         /// but still invite them at the time of discovery.
-        case custom((Peer) -> (context: Data, timeout: TimeInterval)?)
+        case custom((Peer) throws -> (context: Data, timeout: TimeInterval)?)
         /// Use `.none` when you want to manually invite peers by calling `invite` in `MultipeerTransceiver`.
         case none
     }