Device dehydration v2 (matrix-org#1807)

* Device dehydration v2 - add support for device dehydration v2 i.e. `org.matrix.msc3814` - implement rest client methods and models - implement flows for creating and storing the dehydrated device pickle in in 4s as well as recovering it to use for device rehydration - implement methods for creating, retrieving, deleting dehydrated devices as well as consuming the messages stored on the backend in between sessions - delete previous implementation * Bump MatrixSDKCrypto to 0.3.12 - adopt latest API changes and URL encode the deviceId when requesting dehydrated device events * Address PR review comments * Attempt to fix the CI * Drop down to Xcode 14.2 in an attempt to fix the linting
Topheee · Aug 12, 2023 · 24f080d · 24f080d
1 parent b9e6b22
commit 24f080d
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diff --git a/.github/workflows/ci-integration-tests.yml b/.github/workflows/ci-integration-tests.yml
@@ -12,7 +12,7 @@ on:
 jobs:
   integration-tests:
     name: Integration Tests
-    runs-on: macos-11
+    runs-on: macos-13
 
     concurrency:
       # When running on develop, use the sha to allow all runs of this workflow to run concurrently.

diff --git a/.github/workflows/ci-lint.yml b/.github/workflows/ci-lint.yml
@@ -12,7 +12,7 @@ on:
 jobs:
   lint:
     name: pod lib lint
-    runs-on: macos-11
+    runs-on: macos-13
 
     concurrency:
       # When running on develop, use the sha to allow all runs of this workflow to run concurrently.

diff --git a/.github/workflows/ci-unit-tests.yml b/.github/workflows/ci-unit-tests.yml
@@ -12,7 +12,7 @@ on:
 jobs:
   unit-tests:
     name: Unit Tests
-    runs-on: macos-11
+    runs-on: macos-13
 
     concurrency:
       # When running on develop, use the sha to allow all runs of this workflow to run concurrently.

diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
@@ -10,7 +10,7 @@ jobs:
 
   unit-tests:
     name: Unit Tests with sanitizer checks
-    runs-on: macos-11
+    runs-on: macos-13
 
     steps:
       - uses: actions/checkout@v2

diff --git a/MatrixSDK.podspec b/MatrixSDK.podspec
@@ -45,7 +45,7 @@ Pod::Spec.new do |s|
       ss.dependency 'OLMKit', '~> 3.2.5'
       ss.dependency 'Realm', '10.27.0'
       ss.dependency 'libbase58', '~> 0.1.4'
-      ss.dependency 'MatrixSDKCrypto', '0.3.11', :configurations => ["DEBUG", "RELEASE"], :inhibit_warnings => true
+      ss.dependency 'MatrixSDKCrypto', '0.3.12', :configurations => ["DEBUG", "RELEASE"], :inhibit_warnings => true
   end
 
   s.subspec 'JingleCallStack' do |ss|

diff --git a/MatrixSDK.xcodeproj/project.pbxproj b/MatrixSDK.xcodeproj/project.pbxproj
@@ -43,6 +43,8 @@
 		1838928927031D1D003F0C4F /* MXSendReplyEventStringLocalizerProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 1838928527031D1D003F0C4F /* MXSendReplyEventStringLocalizerProtocol.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		18937E7C273A5AE500902626 /* MXPollRelationTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 18937E79273A5AB000902626 /* MXPollRelationTests.m */; };
 		18937E7D273A5AE500902626 /* MXPollRelationTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 18937E79273A5AB000902626 /* MXPollRelationTests.m */; };
+		189B8D102A864C250088D7CE /* DehydrationService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 189B8D0F2A864C250088D7CE /* DehydrationService.swift */; };
+		189B8D112A864C250088D7CE /* DehydrationService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 189B8D0F2A864C250088D7CE /* DehydrationService.swift */; };
 		18B22A7027707CDD00482170 /* MXEventContentLocation.h in Headers */ = {isa = PBXBuildFile; fileRef = 18B22A6E27707CDD00482170 /* MXEventContentLocation.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		18B22A7127707CDD00482170 /* MXEventContentLocation.h in Headers */ = {isa = PBXBuildFile; fileRef = 18B22A6E27707CDD00482170 /* MXEventContentLocation.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		18B22A7227707CDD00482170 /* MXEventContentLocation.m in Sources */ = {isa = PBXBuildFile; fileRef = 18B22A6F27707CDD00482170 /* MXEventContentLocation.m */; };
@@ -680,8 +682,6 @@
 		3A59A52C25A7B1B000DDA1FC /* MXOutboundSessionInfo.m in Sources */ = {isa = PBXBuildFile; fileRef = 3A59A52825A7B1B000DDA1FC /* MXOutboundSessionInfo.m */; };
 		3A7509BB26FC61DF00B85773 /* MXSpaceNotificationCounter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3A7509BA26FC61DF00B85773 /* MXSpaceNotificationCounter.swift */; };
 		3A7509BC26FC61DF00B85773 /* MXSpaceNotificationCounter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3A7509BA26FC61DF00B85773 /* MXSpaceNotificationCounter.swift */; };
-		3A7B8D0E267FCF7200D9DD96 /* MXDehydrationTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 3A7B8CFD267FCD9B00D9DD96 /* MXDehydrationTests.m */; };
-		3A7B8D13267FCF7300D9DD96 /* MXDehydrationTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 3A7B8CFD267FCD9B00D9DD96 /* MXDehydrationTests.m */; };
 		3A858DDA2750EE3F006322C1 /* MXHomeserverCapabilitiesService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3A858DD92750EE3F006322C1 /* MXHomeserverCapabilitiesService.swift */; };
 		3A858DDD275121DB006322C1 /* MXHomeserverCapabilitiesTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3A858DDB275120D1006322C1 /* MXHomeserverCapabilitiesTests.swift */; };
 		3A858DDE275121DC006322C1 /* MXHomeserverCapabilitiesTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3A858DDB275120D1006322C1 /* MXHomeserverCapabilitiesTests.swift */; };
@@ -698,10 +698,6 @@
 		3AB5EBB5270B332B0058703A /* MXSpaceStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3AB5EBB3270B332B0058703A /* MXSpaceStore.swift */; };
 		3AB5EBB7270ED1C00058703A /* MXSpaceFileStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3AB5EBB6270ED1C00058703A /* MXSpaceFileStore.swift */; };
 		3AB5EBB8270ED1C00058703A /* MXSpaceFileStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3AB5EBB6270ED1C00058703A /* MXSpaceFileStore.swift */; };
-		3AC135D92640335100EE1E74 /* MXDehydrationService.h in Headers */ = {isa = PBXBuildFile; fileRef = 3AC135D72640335100EE1E74 /* MXDehydrationService.h */; settings = {ATTRIBUTES = (Public, ); }; };
-		3AC135DA2640335100EE1E74 /* MXDehydrationService.h in Headers */ = {isa = PBXBuildFile; fileRef = 3AC135D72640335100EE1E74 /* MXDehydrationService.h */; settings = {ATTRIBUTES = (Public, ); }; };
-		3AC135DB2640335100EE1E74 /* MXDehydrationService.m in Sources */ = {isa = PBXBuildFile; fileRef = 3AC135D82640335100EE1E74 /* MXDehydrationService.m */; };
-		3AC135DC2640335100EE1E74 /* MXDehydrationService.m in Sources */ = {isa = PBXBuildFile; fileRef = 3AC135D82640335100EE1E74 /* MXDehydrationService.m */; };
 		3AC13802264482A100EE1E74 /* MXExportedOlmDevice.h in Headers */ = {isa = PBXBuildFile; fileRef = 3AC13800264482A100EE1E74 /* MXExportedOlmDevice.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		3AC13803264482A100EE1E74 /* MXExportedOlmDevice.h in Headers */ = {isa = PBXBuildFile; fileRef = 3AC13800264482A100EE1E74 /* MXExportedOlmDevice.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		3AC13804264482A100EE1E74 /* MXExportedOlmDevice.m in Sources */ = {isa = PBXBuildFile; fileRef = 3AC13801264482A100EE1E74 /* MXExportedOlmDevice.m */; };
@@ -2166,6 +2162,7 @@
 		1838928427031D1D003F0C4F /* MXRoomNameStringLocalizerProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MXRoomNameStringLocalizerProtocol.h; sourceTree = "<group>"; };
 		1838928527031D1D003F0C4F /* MXSendReplyEventStringLocalizerProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MXSendReplyEventStringLocalizerProtocol.h; sourceTree = "<group>"; };
 		18937E79273A5AB000902626 /* MXPollRelationTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MXPollRelationTests.m; sourceTree = "<group>"; };
+		189B8D0F2A864C250088D7CE /* DehydrationService.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DehydrationService.swift; sourceTree = "<group>"; };
 		18B22A6E27707CDD00482170 /* MXEventContentLocation.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MXEventContentLocation.h; sourceTree = "<group>"; };
 		18B22A6F27707CDD00482170 /* MXEventContentLocation.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MXEventContentLocation.m; sourceTree = "<group>"; };
 		18C26C3C273C031900805154 /* PollAggregator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PollAggregator.swift; sourceTree = "<group>"; };
@@ -2670,7 +2667,6 @@
 		3A59A52725A7B1B000DDA1FC /* MXOutboundSessionInfo.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MXOutboundSessionInfo.h; sourceTree = "<group>"; };
 		3A59A52825A7B1B000DDA1FC /* MXOutboundSessionInfo.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MXOutboundSessionInfo.m; sourceTree = "<group>"; };
 		3A7509BA26FC61DF00B85773 /* MXSpaceNotificationCounter.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MXSpaceNotificationCounter.swift; sourceTree = "<group>"; };
-		3A7B8CFD267FCD9B00D9DD96 /* MXDehydrationTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MXDehydrationTests.m; sourceTree = "<group>"; };
 		3A858DD92750EE3F006322C1 /* MXHomeserverCapabilitiesService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MXHomeserverCapabilitiesService.swift; sourceTree = "<group>"; };
 		3A858DDB275120D1006322C1 /* MXHomeserverCapabilitiesTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MXHomeserverCapabilitiesTests.swift; sourceTree = "<group>"; };
 		3A858DE027517C0E006322C1 /* MXRoomCapabilityType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MXRoomCapabilityType.swift; sourceTree = "<group>"; };
@@ -2679,8 +2675,6 @@
 		3A9E2B4228EB3960000DB2A7 /* MXMatrixVersionsUnitTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MXMatrixVersionsUnitTests.swift; sourceTree = "<group>"; };
 		3AB5EBB3270B332B0058703A /* MXSpaceStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MXSpaceStore.swift; sourceTree = "<group>"; };
 		3AB5EBB6270ED1C00058703A /* MXSpaceFileStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MXSpaceFileStore.swift; sourceTree = "<group>"; };
-		3AC135D72640335100EE1E74 /* MXDehydrationService.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MXDehydrationService.h; sourceTree = "<group>"; };
-		3AC135D82640335100EE1E74 /* MXDehydrationService.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MXDehydrationService.m; sourceTree = "<group>"; };
 		3AC13800264482A100EE1E74 /* MXExportedOlmDevice.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MXExportedOlmDevice.h; sourceTree = "<group>"; };
 		3AC13801264482A100EE1E74 /* MXExportedOlmDevice.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MXExportedOlmDevice.m; sourceTree = "<group>"; };
 		3AD4F230274B922C003F47FE /* MXRoomAliasAvailabilityChecker.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MXRoomAliasAvailabilityChecker.swift; sourceTree = "<group>"; };
@@ -4389,7 +4383,6 @@
 				324DD2BA246C3ADE00377005 /* MXCryptoSecretStorageTests.m */,
 				322D01C322492B0700150C68 /* MXCryptoShareTests.m */,
 				322A51D71D9E846800C8536D /* MXCryptoTests.m */,
-				3A7B8CFD267FCD9B00D9DD96 /* MXDehydrationTests.m */,
 				3281E89D19E299C000976E1A /* MXErrorUnitTests.m */,
 				B146D4FC21A5C0BC00D8C2C6 /* MXEventScanStoreUnitTests.m */,
 				32A31BC020D3F4C4005916C7 /* MXFilterTests.m */,
@@ -4656,8 +4649,7 @@
 		3AC1379326432ED500EE1E74 /* Dehydration */ = {
 			isa = PBXGroup;
 			children = (
-				3AC135D72640335100EE1E74 /* MXDehydrationService.h */,
-				3AC135D82640335100EE1E74 /* MXDehydrationService.m */,
+				189B8D0F2A864C250088D7CE /* DehydrationService.swift */,
 			);
 			path = Dehydration;
 			sourceTree = "<group>";
@@ -6047,7 +6039,6 @@
 				18B22A7027707CDD00482170 /* MXEventContentLocation.h in Headers */,
 				EC60EDC6265CFEA800B39A4E /* MXRoomSyncUnreadNotifications.h in Headers */,
 				329FB1791A0A74B100A5E88E /* MXTools.h in Headers */,
-				3AC135D92640335100EE1E74 /* MXDehydrationService.h in Headers */,
 				322691321E5EF77D00966A6E /* MXDeviceListOperation.h in Headers */,
 				EC60EE06265CFFF400B39A4E /* MXGroupSyncProfile.h in Headers */,
 				32481A841C03572900782AD3 /* MXRoomAccountData.h in Headers */,
@@ -6550,7 +6541,6 @@
 				B19A309F240424BD00FB6F35 /* MXQRCodeTransaction_Private.h in Headers */,
 				3AC13803264482A100EE1E74 /* MXExportedOlmDevice.h in Headers */,
 				B14EF3262397E90400758AF0 /* MXEventScanStoreDelegate.h in Headers */,
-				3AC135DA2640335100EE1E74 /* MXDehydrationService.h in Headers */,
 				B14EF3292397E90400758AF0 /* MXAutoDiscovery.h in Headers */,
 				EC8A53D725B1BCC6004E0802 /* MXThirdPartyUserInstance.h in Headers */,
 				EC60EDD1265CFECC00B39A4E /* MXRoomSyncSummary.h in Headers */,
@@ -6942,6 +6932,7 @@
 				32A1513F1DAF768D00400192 /* MXOlmInboundGroupSession.m in Sources */,
 				3259CFE626026A6F00C365DB /* MXRestClient+Extensions.swift in Sources */,
 				EC60ED91265CFD3B00B39A4E /* MXRoomSync.m in Sources */,
+				189B8D102A864C250088D7CE /* DehydrationService.swift in Sources */,
 				3AB5EBB4270B332B0058703A /* MXSpaceStore.swift in Sources */,
 				EC8A53A125B1BC77004E0802 /* MXCallSelectAnswerEventContent.m in Sources */,
 				B14EECE72577F76100448735 /* MXLoginSSOFlow.m in Sources */,
@@ -6997,7 +6988,6 @@
 				EC60ED87265CFD0700B39A4E /* MXRoomsSyncResponse.m in Sources */,
 				3213301E228B190F0070BA9B /* MXRealmAggregationsMapper.m in Sources */,
 				8EC511062568216B00EC4E5B /* MXTaggedEventInfo.m in Sources */,
-				3AC135DB2640335100EE1E74 /* MXDehydrationService.m in Sources */,
 				32792BDD2296B90A00F4FC9D /* MXAggregatedEditsUpdater.m in Sources */,
 				ECDBE69028E5D961000C83AF /* MXClientInformationService.swift in Sources */,
 				ED44F01428180EAB00452A5D /* MXSharedHistoryKeyManager.swift in Sources */,
@@ -7523,7 +7513,6 @@
 				ECAE7AEC24ED75F1002FA813 /* MXHTTPAdditionalHeadersUnitTests.m in Sources */,
 				32AF9292241112850008A0FD /* MXCryptoSecretShareTests.m in Sources */,
 				ED8F1D342885ADE200F897E7 /* MXCryptoProtocolStubs.swift in Sources */,
-				3A7B8D0E267FCF7200D9DD96 /* MXDehydrationTests.m in Sources */,
 				3281E8A019E2CC1200976E1A /* MXHTTPClientTests.m in Sources */,
 				321809B919EEBF3000377451 /* MXEventTests.m in Sources */,
 				B1B44319283D00CA00BB26F4 /* MXMegolmDecryptionUnitTests.swift in Sources */,
@@ -7614,6 +7603,7 @@
 				B19EC8A3260E134A00543BEC /* MXRoomInitialStateEventBuilder.swift in Sources */,
 				B14EF1CA2397E90400758AF0 /* MXOlmInboundGroupSession.m in Sources */,
 				B14EF1CB2397E90400758AF0 /* MXRoomAccountData.m in Sources */,
+				189B8D112A864C250088D7CE /* DehydrationService.swift in Sources */,
 				3AB5EBB5270B332B0058703A /* MXSpaceStore.swift in Sources */,
 				B14EF1CC2397E90400758AF0 /* MXEventAnnotationChunk.m in Sources */,
 				B14EF1CD2397E90400758AF0 /* MXRealmEventScanStore.m in Sources */,
@@ -8034,7 +8024,6 @@
 				B1EE98D22804883B00AB63F0 /* MXGeoURIComponents.swift in Sources */,
 				323F877E25546170009E9E67 /* MXBaseProfiler.m in Sources */,
 				ECDA763627B527BA000C48CF /* MXEvent+Extensions.swift in Sources */,
-				3AC135DC2640335100EE1E74 /* MXDehydrationService.m in Sources */,
 				B141DF0F283CDD180023867A /* Realm+MatrixSDK.swift in Sources */,
 				B14EF27C2397E90400758AF0 /* MXRestClient.swift in Sources */,
 				32AF929A24115D8B0008A0FD /* MXPendingSecretShareRequest.m in Sources */,
@@ -8193,7 +8182,6 @@
 				B1E09A292397FD080057C069 /* MXLoggerUnitTests.m in Sources */,
 				B1E09A492398028D0057C069 /* MXSelfSignedHomeserverTests.m in Sources */,
 				32B0E3E523A384D40054FF1A /* MXAggregatedReferenceTests.m in Sources */,
-				3A7B8D13267FCF7300D9DD96 /* MXDehydrationTests.m in Sources */,
 				ED7019E32886C29400FC31B9 /* Device+Stub.swift in Sources */,
 				32D5D16423E400A600E3E37C /* MXRoomSummaryTrustTests.m in Sources */,
 				B1E09A1B2397FCE90057C069 /* MXAggregatedReactionTests.m in Sources */,

diff --git a/MatrixSDK/Background/Crypto/MXBackgroundCryptoV2.swift b/MatrixSDK/Background/Crypto/MXBackgroundCryptoV2.swift
@@ -53,7 +53,8 @@ class MXBackgroundCryptoV2: MXBackgroundCrypto {
                 toDevice: syncResponse.toDevice,
                 deviceLists: syncResponse.deviceLists,
                 deviceOneTimeKeysCounts: syncResponse.deviceOneTimeKeysCount ?? [:],
-                unusedFallbackKeys: syncResponse.unusedFallbackKeys
+                unusedFallbackKeys: syncResponse.unusedFallbackKeys,
+                nextBatchToken: syncResponse.nextBatch
             )
         } catch {
             log.error("Failed handling sync response", context: error)

diff --git a/MatrixSDK/Crypto/CryptoMachine/MXCryptoMachine.swift b/MatrixSDK/Crypto/CryptoMachine/MXCryptoMachine.swift
@@ -187,7 +187,8 @@ extension MXCryptoMachine: MXCryptoSyncing {
         toDevice: MXToDeviceSyncResponse?,
         deviceLists: MXDeviceListResponse?,
         deviceOneTimeKeysCounts: [String: NSNumber],
-        unusedFallbackKeys: [String]?
+        unusedFallbackKeys: [String]?,
+        nextBatchToken: String
     ) throws -> MXToDeviceSyncResponse {
         let events = toDevice?.jsonString() ?? "[]"
         let deviceChanges = DeviceLists(
@@ -200,7 +201,8 @@ extension MXCryptoMachine: MXCryptoSyncing {
             events: events,
             deviceChanges: deviceChanges,
             keyCounts: keyCounts,
-            unusedFallbackKeys: unusedFallbackKeys
+            unusedFallbackKeys: unusedFallbackKeys,
+            nextBatchToken: nextBatchToken
         )
 
         var deserialisedToDeviceEvents = [Any]()
@@ -367,6 +369,10 @@ extension MXCryptoMachine: MXCryptoDevicesSource {
             return nil
         }
     }
+
+    func dehydratedDevices() -> DehydratedDevicesProtocol {
+        machine.dehydratedDevices()
+    }
 }
 
 extension MXCryptoMachine: MXCryptoUserIdentitySource {

diff --git a/MatrixSDK/Crypto/CryptoMachine/MXCryptoProtocols.swift b/MatrixSDK/Crypto/CryptoMachine/MXCryptoProtocols.swift
@@ -35,7 +35,8 @@ protocol MXCryptoSyncing: MXCryptoIdentity {
         toDevice: MXToDeviceSyncResponse?,
         deviceLists: MXDeviceListResponse?,
         deviceOneTimeKeysCounts: [String: NSNumber],
-        unusedFallbackKeys: [String]?
+        unusedFallbackKeys: [String]?,
+        nextBatchToken: String
     ) throws -> MXToDeviceSyncResponse
 
     func processOutgoingRequests() async throws
@@ -50,6 +51,7 @@ protocol MXCryptoSyncing: MXCryptoIdentity {
 protocol MXCryptoDevicesSource: MXCryptoIdentity {
     func device(userId: String, deviceId: String) -> Device?
     func devices(userId: String) -> [Device]
+    func dehydratedDevices() -> DehydratedDevicesProtocol
 }
 
 /// Source of user identities and their cryptographic trust status