diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationAcceptContent.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationAcceptContent.kt
index bda4b9f0ac..66914374df 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationAcceptContent.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationAcceptContent.kt
@@ -20,8 +20,8 @@ import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.session.events.model.RelationType
 import im.vector.matrix.android.api.session.events.model.toContent
 import im.vector.matrix.android.api.session.room.model.relation.RelationDefaultContent
-import im.vector.matrix.android.internal.crypto.verification.AcceptVerifInfoFactory
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoAccept
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoAcceptFactory
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoAccept
 import timber.log.Timber
 
 @JsonClass(generateAdapter = true)
@@ -32,7 +32,7 @@ internal data class MessageVerificationAcceptContent(
         @Json(name = "short_authentication_string") override val shortAuthenticationStrings: List<String>?,
         @Json(name = "m.relates_to") val relatesTo: RelationDefaultContent?,
         @Json(name = "commitment") override var commitment: String? = null
-) : VerifInfoAccept {
+) : VerificationInfoAccept {
 
     override val transactionID: String?
         get() = relatesTo?.eventId
@@ -52,14 +52,14 @@ internal data class MessageVerificationAcceptContent(
 
     override fun toEventContent() = this.toContent()
 
-    companion object : AcceptVerifInfoFactory {
+    companion object : VerificationInfoAcceptFactory {
 
         override fun create(tid: String,
                             keyAgreementProtocol: String,
                             hash: String,
                             commitment: String,
                             messageAuthenticationCode: String,
-                            shortAuthenticationStrings: List<String>): VerifInfoAccept {
+                            shortAuthenticationStrings: List<String>): VerificationInfoAccept {
             return MessageVerificationAcceptContent(
                     hash,
                     keyAgreementProtocol,
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationCancelContent.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationCancelContent.kt
index 08fc3cbdbb..2070845f46 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationCancelContent.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationCancelContent.kt
@@ -21,7 +21,7 @@ import im.vector.matrix.android.api.session.crypto.sas.CancelCode
 import im.vector.matrix.android.api.session.events.model.RelationType
 import im.vector.matrix.android.api.session.events.model.toContent
 import im.vector.matrix.android.api.session.room.model.relation.RelationDefaultContent
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoCancel
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoCancel
 
 @JsonClass(generateAdapter = true)
 internal data class MessageVerificationCancelContent(
@@ -29,7 +29,7 @@ internal data class MessageVerificationCancelContent(
         @Json(name = "reason") override val reason: String? = null,
         @Json(name = "m.relates_to") val relatesTo: RelationDefaultContent?
 
-) : VerifInfoCancel {
+) : VerificationInfoCancel {
 
     override val transactionID: String?
         get() = relatesTo?.eventId
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationKeyContent.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationKeyContent.kt
index 0b93e3299a..2dacb19871 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationKeyContent.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationKeyContent.kt
@@ -20,8 +20,8 @@ import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.session.events.model.RelationType
 import im.vector.matrix.android.api.session.events.model.toContent
 import im.vector.matrix.android.api.session.room.model.relation.RelationDefaultContent
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoKey
-import im.vector.matrix.android.internal.crypto.verification.KeyVerifInfoFactory
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoKey
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoKeyFactory
 import timber.log.Timber
 
 @JsonClass(generateAdapter = true)
@@ -31,7 +31,7 @@ internal data class MessageVerificationKeyContent(
          */
         @Json(name = "key") override val key: String? = null,
         @Json(name = "m.relates_to") val relatesTo: RelationDefaultContent?
-) : VerifInfoKey {
+) : VerificationInfoKey {
 
     override val transactionID: String?
         get() = relatesTo?.eventId
@@ -46,9 +46,9 @@ internal data class MessageVerificationKeyContent(
 
     override fun toEventContent() = this.toContent()
 
-    companion object : KeyVerifInfoFactory {
+    companion object : VerificationInfoKeyFactory {
 
-        override fun create(tid: String, pubKey: String): VerifInfoKey {
+        override fun create(tid: String, pubKey: String): VerificationInfoKey {
             return MessageVerificationKeyContent(
                     pubKey,
                     RelationDefaultContent(
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationMacContent.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationMacContent.kt
index 92ea4bca52..f08625791f 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationMacContent.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationMacContent.kt
@@ -20,15 +20,15 @@ import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.session.events.model.RelationType
 import im.vector.matrix.android.api.session.events.model.toContent
 import im.vector.matrix.android.api.session.room.model.relation.RelationDefaultContent
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoMac
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoMacFactory
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoMac
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoMacFactory
 
 @JsonClass(generateAdapter = true)
 internal data class MessageVerificationMacContent(
         @Json(name = "mac") override val mac: Map<String, String>? = null,
         @Json(name = "keys") override val keys: String? = null,
         @Json(name = "m.relates_to") val relatesTo: RelationDefaultContent?
-) : VerifInfoMac {
+) : VerificationInfoMac {
 
     override val transactionID: String?
         get() = relatesTo?.eventId
@@ -42,8 +42,8 @@ internal data class MessageVerificationMacContent(
         return true
     }
 
-    companion object : VerifInfoMacFactory {
-        override fun create(tid: String, mac: Map<String, String>, keys: String): VerifInfoMac {
+    companion object : VerificationInfoMacFactory {
+        override fun create(tid: String, mac: Map<String, String>, keys: String): VerificationInfoMac {
             return MessageVerificationMacContent(
                     mac,
                     keys,
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationRequestContent.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationRequestContent.kt
index afefa39847..897eb9dbbf 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationRequestContent.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationRequestContent.kt
@@ -21,12 +21,12 @@ import im.vector.matrix.android.api.session.events.model.Content
 import im.vector.matrix.android.api.session.room.model.relation.RelationDefaultContent
 
 @JsonClass(generateAdapter = true)
-class MessageVerificationRequestContent(
+internal data class MessageVerificationRequestContent(
         @Json(name = "msgtype") override val type: String = MessageType.MSGTYPE_VERIFICATION_REQUEST,
         @Json(name = "body") override val body: String,
         @Json(name = "from_device") val fromDevice: String,
         @Json(name = "methods") val methods: List<String>,
-        @Json(name = "to") val to: String,
+        @Json(name = "to") val toUserId: String,
         // @Json(name = "timestamp") val timestamp: Int,
         @Json(name = "format") val format: String? = null,
         @Json(name = "formatted_body") val formattedBody: String? = null,
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationStartContent.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationStartContent.kt
index f6ec00ffb2..7d77a34e27 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationStartContent.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageVerificationStartContent.kt
@@ -22,12 +22,12 @@ import im.vector.matrix.android.api.session.events.model.toContent
 import im.vector.matrix.android.api.session.room.model.relation.RelationDefaultContent
 import im.vector.matrix.android.internal.crypto.model.rest.KeyVerificationStart
 import im.vector.matrix.android.internal.crypto.verification.SASVerificationTransaction
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoStart
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoStart
 import im.vector.matrix.android.internal.util.JsonCanonicalizer
 import timber.log.Timber
 
 @JsonClass(generateAdapter = true)
-data class MessageVerificationStartContent(
+internal data class MessageVerificationStartContent(
         @Json(name = "from_device") override val fromDevice: String?,
         @Json(name = "hashes") override val hashes: List<String>?,
         @Json(name = "key_agreement_protocols") override val keyAgreementProtocols: List<String>?,
@@ -35,7 +35,7 @@ data class MessageVerificationStartContent(
         @Json(name = "short_authentication_string") override val shortAuthenticationStrings: List<String>?,
         @Json(name = "method") override val method: String?,
         @Json(name = "m.relates_to") val relatesTo: RelationDefaultContent?
-) : VerifInfoStart {
+) : VerificationInfoStart {
 
     override fun toCanonicalJson(): String? {
        return JsonCanonicalizer.getCanonicalJson(MessageVerificationStartContent::class.java, this)
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationAccept.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationAccept.kt
index 20d7682cb9..ef30986124 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationAccept.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationAccept.kt
@@ -17,8 +17,8 @@ package im.vector.matrix.android.internal.crypto.model.rest
 
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoAccept
-import im.vector.matrix.android.internal.crypto.verification.AcceptVerifInfoFactory
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoAccept
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoAcceptFactory
 import timber.log.Timber
 
 /**
@@ -65,7 +65,7 @@ internal data class KeyVerificationAccept(
          */
         @Json(name = "commitment")
         override var commitment: String? = null
-) : SendToDeviceObject, VerifInfoAccept {
+) : SendToDeviceObject, VerificationInfoAccept {
 
     override fun isValid(): Boolean {
         if (transactionID.isNullOrBlank()
@@ -82,13 +82,13 @@ internal data class KeyVerificationAccept(
 
     override fun toSendToDeviceObject() = this
 
-    companion object : AcceptVerifInfoFactory {
+    companion object : VerificationInfoAcceptFactory {
         override fun create(tid: String,
                             keyAgreementProtocol: String,
                             hash: String,
                             commitment: String,
                             messageAuthenticationCode: String,
-                            shortAuthenticationStrings: List<String>): VerifInfoAccept {
+                            shortAuthenticationStrings: List<String>): VerificationInfoAccept {
             return KeyVerificationAccept().apply {
                 this.transactionID = tid
                 this.keyAgreementProtocol = keyAgreementProtocol
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationCancel.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationCancel.kt
index 7ffffbbfa1..818bffc942 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationCancel.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationCancel.kt
@@ -18,7 +18,7 @@ package im.vector.matrix.android.internal.crypto.model.rest
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.session.crypto.sas.CancelCode
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoCancel
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoCancel
 
 /**
  * To device event sent by either party to cancel a key verification.
@@ -40,7 +40,7 @@ internal data class KeyVerificationCancel(
          * human-readable reason for cancelling.  This should only be used if the receiving client does not understand the code given.
          */
         override var reason: String? = null
-) : SendToDeviceObject, VerifInfoCancel {
+) : SendToDeviceObject, VerificationInfoCancel {
 
     companion object {
         fun create(tid: String, cancelCode: CancelCode): KeyVerificationCancel {
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationKey.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationKey.kt
index 458c12743f..bf1482ac9f 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationKey.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationKey.kt
@@ -17,8 +17,8 @@ package im.vector.matrix.android.internal.crypto.model.rest
 
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
-import im.vector.matrix.android.internal.crypto.verification.KeyVerifInfoFactory
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoKey
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoKeyFactory
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoKey
 
 /**
  * Sent by both devices to send their ephemeral Curve25519 public key to the other device.
@@ -35,9 +35,9 @@ internal data class KeyVerificationKey(
          */
         @Json(name = "key") override val key: String? = null
 
-) : SendToDeviceObject, VerifInfoKey {
+) : SendToDeviceObject, VerificationInfoKey {
 
-    companion object : KeyVerifInfoFactory {
+    companion object : VerificationInfoKeyFactory {
         override fun create(tid: String, pubKey: String): KeyVerificationKey {
             return KeyVerificationKey(tid, pubKey)
         }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationMac.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationMac.kt
index d2c147e145..6bb1ae6644 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationMac.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationMac.kt
@@ -17,8 +17,8 @@ package im.vector.matrix.android.internal.crypto.model.rest
 
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoMac
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoMacFactory
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoMac
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoMacFactory
 
 /**
  * Sent by both devices to send the MAC of their device key to the other device.
@@ -29,7 +29,7 @@ internal data class KeyVerificationMac(
         @Json(name = "mac") override val mac: Map<String, String>? = null,
         @Json(name = "key") override val keys: String? = null
 
-) : SendToDeviceObject, VerifInfoMac {
+) : SendToDeviceObject, VerificationInfoMac {
 
     override fun isValid(): Boolean {
         if (transactionID.isNullOrBlank() || keys.isNullOrBlank() || mac.isNullOrEmpty()) {
@@ -40,8 +40,8 @@ internal data class KeyVerificationMac(
 
     override fun toSendToDeviceObject(): SendToDeviceObject? = this
 
-    companion object : VerifInfoMacFactory {
-        override fun create(tid: String, mac: Map<String, String>, keys: String): VerifInfoMac {
+    companion object : VerificationInfoMacFactory {
+        override fun create(tid: String, mac: Map<String, String>, keys: String): VerificationInfoMac {
             return KeyVerificationMac(tid, mac, keys)
         }
     }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationRequest.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationRequest.kt
index 14954a17cd..51eed84412 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationRequest.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationRequest.kt
@@ -23,7 +23,7 @@ import im.vector.matrix.android.internal.crypto.verification.VerificationInfo
  * Requests a key verification with another user's devices.
  */
 @JsonClass(generateAdapter = true)
-data class KeyVerificationRequest(
+internal data class KeyVerificationRequest(
 
         @Json(name = "from_device")
         val fromDevice: String,
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationStart.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationStart.kt
index f7cc10a12b..47c2a62d92 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationStart.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/model/rest/KeyVerificationStart.kt
@@ -19,7 +19,7 @@ import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.session.crypto.sas.SasMode
 import im.vector.matrix.android.internal.crypto.verification.SASVerificationTransaction
-import im.vector.matrix.android.internal.crypto.verification.VerifInfoStart
+import im.vector.matrix.android.internal.crypto.verification.VerificationInfoStart
 import im.vector.matrix.android.internal.util.JsonCanonicalizer
 import timber.log.Timber
 
@@ -27,7 +27,7 @@ import timber.log.Timber
  * Sent by Alice to initiate an interactive key verification.
  */
 @JsonClass(generateAdapter = true)
-class KeyVerificationStart : SendToDeviceObject, VerifInfoStart {
+class KeyVerificationStart : SendToDeviceObject, VerificationInfoStart {
 
     override fun toCanonicalJson(): String? {
         return JsonCanonicalizer.getCanonicalJson(KeyVerificationStart::class.java, this)
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/RequestVerificationDMTask.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/RequestVerificationDMTask.kt
index 57d225a193..ae8a40f296 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/RequestVerificationDMTask.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/RequestVerificationDMTask.kt
@@ -68,9 +68,8 @@ internal class DefaultRequestVerificationDMTask @Inject constructor(
     }
 
     private suspend fun createRequestEvent(params: RequestVerificationDMTask.Params): Event {
-        val event = localEchoEventFactory.createVerificationRequest(params.roomId, params.from, params.to, params.methods).also {
-            localEchoEventFactory.saveLocalEcho(monarchy, it)
-        }
+        val event = localEchoEventFactory.createVerificationRequest(params.roomId, params.from, params.to, params.methods)
+                .also { localEchoEventFactory.saveLocalEcho(monarchy, it) }
         if (params.cryptoService.isRoomEncrypted(params.roomId)) {
             try {
                 return encryptEventTask.execute(EncryptEventTask.Params(
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultIncomingSASVerificationTransaction.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultIncomingSASVerificationTransaction.kt
index aac2b49f57..5eff26a5bb 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultIncomingSASVerificationTransaction.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultIncomingSASVerificationTransaction.kt
@@ -66,7 +66,7 @@ internal class DefaultIncomingSASVerificationTransaction(
             }
         }
 
-    override fun onVerificationStart(startReq: VerifInfoStart) {
+    override fun onVerificationStart(startReq: VerificationInfoStart) {
         Timber.v("## SAS I: received verification request from state $state")
         if (state != SasVerificationTxState.None) {
             Timber.e("## SAS I: received verification request from invalid state")
@@ -126,7 +126,7 @@ internal class DefaultIncomingSASVerificationTransaction(
         }
     }
 
-    private fun doAccept(accept: VerifInfoAccept) {
+    private fun doAccept(accept: VerificationInfoAccept) {
         this.accepted = accept
         Timber.v("## SAS incoming accept request id:$transactionId")
 
@@ -144,12 +144,12 @@ internal class DefaultIncomingSASVerificationTransaction(
         }
     }
 
-    override fun onVerificationAccept(accept: VerifInfoAccept) {
+    override fun onVerificationAccept(accept: VerificationInfoAccept) {
         Timber.v("## SAS invalid message for incoming request id:$transactionId")
         cancel(CancelCode.UnexpectedMessage)
     }
 
-    override fun onKeyVerificationKey(userId: String, vKey: VerifInfoKey) {
+    override fun onKeyVerificationKey(userId: String, vKey: VerificationInfoKey) {
         Timber.v("## SAS received key for request id:$transactionId")
         if (state != SasVerificationTxState.SendingAccept && state != SasVerificationTxState.Accepted) {
             Timber.e("## SAS received key from invalid state $state")
@@ -202,7 +202,7 @@ internal class DefaultIncomingSASVerificationTransaction(
         state = SasVerificationTxState.ShortCodeReady
     }
 
-    override fun onKeyVerificationMac(vKey: VerifInfoMac) {
+    override fun onKeyVerificationMac(vKey: VerificationInfoMac) {
         Timber.v("## SAS I: received mac for request id:$transactionId")
         // Check for state?
         if (state != SasVerificationTxState.SendingKey
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultOutgoingSASVerificationRequest.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultOutgoingSASVerificationRequest.kt
index 4362e897c8..5827ecf4b8 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultOutgoingSASVerificationRequest.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultOutgoingSASVerificationRequest.kt
@@ -66,7 +66,7 @@ internal class DefaultOutgoingSASVerificationRequest(
             }
         }
 
-    override fun onVerificationStart(startReq: VerifInfoStart) {
+    override fun onVerificationStart(startReq: VerificationInfoStart) {
         Timber.e("## SAS O: onVerificationStart - unexpected id:$transactionId")
         cancel(CancelCode.UnexpectedMessage)
     }
@@ -122,7 +122,7 @@ internal class DefaultOutgoingSASVerificationRequest(
 //        )
 //    }
 
-    override fun onVerificationAccept(accept: VerifInfoAccept) {
+    override fun onVerificationAccept(accept: VerificationInfoAccept) {
         Timber.v("## SAS O: onVerificationAccept id:$transactionId")
         if (state != SasVerificationTxState.Started) {
             Timber.e("## SAS O: received accept request from invalid state $state")
@@ -159,7 +159,7 @@ internal class DefaultOutgoingSASVerificationRequest(
         }
     }
 
-    override fun onKeyVerificationKey(userId: String, vKey: VerifInfoKey) {
+    override fun onKeyVerificationKey(userId: String, vKey: VerificationInfoKey) {
         Timber.v("## SAS O: onKeyVerificationKey id:$transactionId")
         if (state != SasVerificationTxState.SendingKey && state != SasVerificationTxState.KeySent) {
             Timber.e("## received key from invalid state $state")
@@ -201,7 +201,7 @@ internal class DefaultOutgoingSASVerificationRequest(
         }
     }
 
-    override fun onKeyVerificationMac(vKey: VerifInfoMac) {
+    override fun onKeyVerificationMac(vKey: VerificationInfoMac) {
         Timber.v("## SAS O: onKeyVerificationMac id:$transactionId")
         if (state != SasVerificationTxState.OnKeyReceived
                 && state != SasVerificationTxState.ShortCodeReady
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultSasVerificationService.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultSasVerificationService.kt
index 6552dca7ab..1d15a996dd 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultSasVerificationService.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultSasVerificationService.kt
@@ -39,7 +39,6 @@ import im.vector.matrix.android.internal.crypto.model.rest.*
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
 import im.vector.matrix.android.internal.crypto.tasks.DefaultRequestVerificationDMTask
 import im.vector.matrix.android.internal.crypto.tasks.RequestVerificationDMTask
-import im.vector.matrix.android.internal.crypto.tasks.SendToDeviceTask
 import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.send.SendResponse
 import im.vector.matrix.android.internal.task.TaskConstraints
@@ -56,18 +55,18 @@ import kotlin.collections.HashMap
 import kotlin.collections.set
 
 @SessionScope
-internal class DefaultSasVerificationService @Inject constructor(private val credentials: Credentials,
-                                                                 private val cryptoStore: IMXCryptoStore,
-                                                                 private val myDeviceInfoHolder: Lazy<MyDeviceInfoHolder>,
-                                                                 private val deviceListManager: DeviceListManager,
-                                                                 private val setDeviceVerificationAction: SetDeviceVerificationAction,
-                                                                 private val sendToDeviceTask: SendToDeviceTask,
-                                                                 private val requestVerificationDMTask: DefaultRequestVerificationDMTask,
-                                                                 private val coroutineDispatchers: MatrixCoroutineDispatchers,
-                                                                 private val sasTransportRoomMessageFactory: SasTransportRoomMessageFactory,
-                                                                 private val sasToDeviceTransportFactory: SasToDeviceTransportFactory,
-                                                                 private val taskExecutor: TaskExecutor)
-    : VerificationTransaction.Listener, SasVerificationService {
+internal class DefaultSasVerificationService @Inject constructor(
+        private val credentials: Credentials,
+        private val cryptoStore: IMXCryptoStore,
+        private val myDeviceInfoHolder: Lazy<MyDeviceInfoHolder>,
+        private val deviceListManager: DeviceListManager,
+        private val setDeviceVerificationAction: SetDeviceVerificationAction,
+        private val requestVerificationDMTask: DefaultRequestVerificationDMTask,
+        private val coroutineDispatchers: MatrixCoroutineDispatchers,
+        private val sasTransportRoomMessageFactory: SasTransportRoomMessageFactory,
+        private val sasTransportToDeviceFactory: SasTransportToDeviceFactory,
+        private val taskExecutor: TaskExecutor
+) : VerificationTransaction.Listener, SasVerificationService {
 
     private val uiHandler = Handler(Looper.getMainLooper())
 
@@ -217,7 +216,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
             return
         }
 
-        handleStart(otherUserId, startReq as VerifInfoStart) {
+        handleStart(otherUserId, startReq as VerificationInfoStart) {
             it.transport = sasTransportRoomMessageFactory.createTransport(event.roomId
                     ?: "", cryptoService)
         }?.let {
@@ -246,7 +245,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
 //                        startReq.fromDevice ?: event.getSenderKey()!!,
 //                        CancelCode.UnknownMethod
 //                )
-                sasToDeviceTransportFactory.createTransport(null).cancelTransaction(
+                sasTransportToDeviceFactory.createTransport(null).cancelTransaction(
                         startReq.transactionID ?: "",
                         otherUserId!!,
                         startReq.fromDevice ?: event.getSenderKey()!!,
@@ -257,9 +256,9 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
         }
         // Download device keys prior to everything
         handleStart(otherUserId, startReq) {
-            it.transport = sasToDeviceTransportFactory.createTransport(it)
+            it.transport = sasTransportToDeviceFactory.createTransport(it)
         }?.let {
-            sasToDeviceTransportFactory.createTransport(null).cancelTransaction(
+            sasTransportToDeviceFactory.createTransport(null).cancelTransaction(
                     startReq.transactionID ?: "",
                     otherUserId!!,
                     startReq.fromDevice ?: event.getSenderKey()!!,
@@ -268,7 +267,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
         }
     }
 
-    private suspend fun handleStart(otherUserId: String?, startReq: VerifInfoStart, txConfigure: (SASVerificationTransaction) -> Unit): CancelCode? {
+    private suspend fun handleStart(otherUserId: String?, startReq: VerificationInfoStart, txConfigure: (SASVerificationTransaction) -> Unit): CancelCode? {
         Timber.d("## SAS onStartRequestReceived ${startReq.transactionID!!}")
         if (checkKeysAreDownloaded(otherUserId!!, startReq) != null) {
             Timber.v("## SAS onStartRequestReceived $startReq")
@@ -318,7 +317,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
     }
 
     private suspend fun checkKeysAreDownloaded(otherUserId: String,
-                                               startReq: VerifInfoStart): MXUsersDevicesMap<MXDeviceInfo>? {
+                                               startReq: VerificationInfoStart): MXUsersDevicesMap<MXDeviceInfo>? {
         return try {
             val keys = deviceListManager.downloadKeys(listOf(otherUserId), true)
             val deviceIds = keys.getUserDeviceIds(otherUserId) ?: return null
@@ -357,7 +356,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
         handleOnCancel(otherUserId, cancelReq)
     }
 
-    private fun handleOnCancel(otherUserId: String, cancelReq: VerifInfoCancel) {
+    private fun handleOnCancel(otherUserId: String, cancelReq: VerificationInfoCancel) {
         Timber.v("## SAS onCancelReceived otherUser:$otherUserId reason:${cancelReq.reason}")
         val existing = getExistingTransaction(otherUserId, cancelReq.transactionID!!)
         if (existing == null) {
@@ -387,7 +386,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
         handleAccept(acceptReq, event.senderId!!)
     }
 
-    private fun handleAccept(acceptReq: VerifInfoAccept, senderId: String) {
+    private fun handleAccept(acceptReq: VerificationInfoAccept, senderId: String) {
         if (!acceptReq.isValid()) {
             // ignore
             Timber.e("## SAS Received invalid accept request")
@@ -433,7 +432,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
         handleKeyReceived(event, keyReq)
     }
 
-    private fun handleKeyReceived(event: Event, keyReq: VerifInfoKey) {
+    private fun handleKeyReceived(event: Event, keyReq: VerificationInfoKey) {
         Timber.d("##  SAS Received Key from ${event.senderId} with info $keyReq")
         val otherUserId = event.senderId!!
         val existing = getExistingTransaction(otherUserId, keyReq.transactionID!!)
@@ -474,7 +473,7 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
         handleMacReceived(event.senderId, macReq)
     }
 
-    private fun handleMacReceived(senderId: String, macReq: VerifInfoMac) {
+    private fun handleMacReceived(senderId: String, macReq: VerificationInfoMac) {
         Timber.v("## SAS Received $macReq")
         val existing = getExistingTransaction(senderId, macReq.transactionID!!)
         if (existing == null) {
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASVerificationTransaction.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASVerificationTransaction.kt
index 443443afad..31d6fd4b5c 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASVerificationTransaction.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASVerificationTransaction.kt
@@ -88,13 +88,13 @@ internal abstract class SASVerificationTransaction(
 
     private var olmSas: OlmSAS? = null
 
-    var startReq: VerifInfoStart? = null
-    var accepted: VerifInfoAccept? = null
+    var startReq: VerificationInfoStart? = null
+    var accepted: VerificationInfoAccept? = null
     var otherKey: String? = null
     var shortCodeBytes: ByteArray? = null
 
-    var myMac: VerifInfoMac? = null
-    var theirMac: VerifInfoMac? = null
+    var myMac: VerificationInfoMac? = null
+    var theirMac: VerificationInfoMac? = null
 
     fun getSAS(): OlmSAS {
         if (olmSas == null) olmSas = OlmSAS()
@@ -171,23 +171,23 @@ internal abstract class SASVerificationTransaction(
 
     override fun acceptVerificationEvent(senderId: String, info: VerificationInfo) {
         when (info) {
-            is VerifInfoStart  -> onVerificationStart(info)
-            is VerifInfoAccept -> onVerificationAccept(info)
-            is VerifInfoKey    -> onKeyVerificationKey(senderId, info)
-            is VerifInfoMac    -> onKeyVerificationMac(info)
-            else               -> {
+            is VerificationInfoStart  -> onVerificationStart(info)
+            is VerificationInfoAccept -> onVerificationAccept(info)
+            is VerificationInfoKey    -> onKeyVerificationKey(senderId, info)
+            is VerificationInfoMac    -> onKeyVerificationMac(info)
+            else                      -> {
                 // nop
             }
         }
     }
 
-    abstract fun onVerificationStart(startReq: VerifInfoStart)
+    abstract fun onVerificationStart(startReq: VerificationInfoStart)
 
-    abstract fun onVerificationAccept(accept: VerifInfoAccept)
+    abstract fun onVerificationAccept(accept: VerificationInfoAccept)
 
-    abstract fun onKeyVerificationKey(userId: String, vKey: VerifInfoKey)
+    abstract fun onKeyVerificationKey(userId: String, vKey: VerificationInfoKey)
 
-    abstract fun onKeyVerificationMac(vKey: VerifInfoMac)
+    abstract fun onKeyVerificationMac(vKey: VerificationInfoMac)
 
     protected fun verifyMacs() {
         Timber.v("## SAS verifying macs for id:$transactionId")
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransport.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransport.kt
index 23ebd89f7a..31a89335b7 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransport.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransport.kt
@@ -44,10 +44,10 @@ internal interface SasTransport {
                      hash: String,
                      commitment: String,
                      messageAuthenticationCode: String,
-                     shortAuthenticationStrings: List<String>): VerifInfoAccept
+                     shortAuthenticationStrings: List<String>): VerificationInfoAccept
 
     fun createKey(tid: String,
-                     pubKey: String): VerifInfoKey
+                     pubKey: String): VerificationInfoKey
 
-    fun createMac(tid: String, mac: Map<String, String>, keys: String): VerifInfoMac
+    fun createMac(tid: String, mac: Map<String, String>, keys: String): VerificationInfoMac
 }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportRoomMessage.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportRoomMessage.kt
index 1173914ba1..fda411af39 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportRoomMessage.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportRoomMessage.kt
@@ -33,7 +33,7 @@ import im.vector.matrix.android.internal.task.configureWith
 import timber.log.Timber
 import javax.inject.Inject
 
-internal class SasTransportRoomMessage constructor(
+internal class SasTransportRoomMessage(
         private val roomId: String,
         private val cryptoService: CryptoService,
 //        private val tx: SASVerificationTransaction?,
@@ -109,9 +109,9 @@ internal class SasTransportRoomMessage constructor(
                               commitment: String,
                               messageAuthenticationCode: String,
                               shortAuthenticationStrings: List<String>)
-            : VerifInfoAccept = MessageVerificationAcceptContent.create(tid, keyAgreementProtocol, hash, commitment, messageAuthenticationCode, shortAuthenticationStrings)
+            : VerificationInfoAccept = MessageVerificationAcceptContent.create(tid, keyAgreementProtocol, hash, commitment, messageAuthenticationCode, shortAuthenticationStrings)
 
-    override fun createKey(tid: String, pubKey: String): VerifInfoKey = MessageVerificationKeyContent.create(tid, pubKey)
+    override fun createKey(tid: String, pubKey: String): VerificationInfoKey = MessageVerificationKeyContent.create(tid, pubKey)
 
     override fun createMac(tid: String, mac: Map<String, String>, keys: String) = MessageVerificationMacContent.create(tid, mac, keys)
 }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportToDevice.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportToDevice.kt
index 4f36a5218e..0e1459a920 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportToDevice.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SasTransportToDevice.kt
@@ -98,14 +98,14 @@ internal class SasTransportToDevice(
                               commitment: String,
                               messageAuthenticationCode: String,
                               shortAuthenticationStrings: List<String>)
-            : VerifInfoAccept = KeyVerificationAccept.create(tid, keyAgreementProtocol, hash, commitment, messageAuthenticationCode, shortAuthenticationStrings)
+            : VerificationInfoAccept = KeyVerificationAccept.create(tid, keyAgreementProtocol, hash, commitment, messageAuthenticationCode, shortAuthenticationStrings)
 
-    override fun createKey(tid: String, pubKey: String): VerifInfoKey = KeyVerificationKey.create(tid, pubKey)
+    override fun createKey(tid: String, pubKey: String): VerificationInfoKey = KeyVerificationKey.create(tid, pubKey)
 
     override fun createMac(tid: String, mac: Map<String, String>, keys: String) = KeyVerificationMac.create(tid, mac, keys)
 }
 
-internal class SasToDeviceTransportFactory @Inject constructor(
+internal class SasTransportToDeviceFactory @Inject constructor(
         private val sendToDeviceTask: SendToDeviceTask,
         private val taskExecutor: TaskExecutor) {
 
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfo.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfo.kt
index 5fe5c62edd..44a65aa926 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfo.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfo.kt
@@ -18,7 +18,7 @@ package im.vector.matrix.android.internal.crypto.verification
 import im.vector.matrix.android.api.session.events.model.Content
 import im.vector.matrix.android.internal.crypto.model.rest.SendToDeviceObject
 
-interface VerificationInfo {
+internal interface VerificationInfo {
     fun toEventContent(): Content? = null
     fun toSendToDeviceObject(): SendToDeviceObject? = null
     fun isValid() : Boolean
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoAccept.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoAccept.kt
similarity index 90%
rename from matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoAccept.kt
rename to matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoAccept.kt
index c0677439f4..7f639c3bc7 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoAccept.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoAccept.kt
@@ -15,7 +15,7 @@
  */
 package im.vector.matrix.android.internal.crypto.verification
 
-internal interface VerifInfoAccept : VerificationInfo {
+internal interface VerificationInfoAccept : VerificationInfo {
 
     val transactionID: String?
 
@@ -46,12 +46,12 @@ internal interface VerifInfoAccept : VerificationInfo {
     var commitment: String?
 }
 
-internal interface AcceptVerifInfoFactory {
+internal interface VerificationInfoAcceptFactory {
 
     fun create(tid: String,
                keyAgreementProtocol: String,
                hash: String,
                commitment: String,
                messageAuthenticationCode: String,
-               shortAuthenticationStrings: List<String>): VerifInfoAccept
+               shortAuthenticationStrings: List<String>): VerificationInfoAccept
 }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoCancel.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoCancel.kt
similarity index 87%
rename from matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoCancel.kt
rename to matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoCancel.kt
index 94c52f61ea..2970358a15 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoCancel.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoCancel.kt
@@ -15,11 +15,11 @@
  */
 package im.vector.matrix.android.internal.crypto.verification
 
-interface VerifInfoCancel : VerificationInfo {
+internal interface VerificationInfoCancel : VerificationInfo {
 
     val transactionID: String?
     /**
-     * machine-readable reason for cancelling, see #CancelCode
+     * machine-readable reason for cancelling, see [CancelCode]
      */
     val code: String?
 
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoKey.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoKey.kt
similarity index 83%
rename from matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoKey.kt
rename to matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoKey.kt
index 69ae917938..e5deb63b56 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoKey.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoKey.kt
@@ -18,7 +18,7 @@ package im.vector.matrix.android.internal.crypto.verification
 /**
  * Sent by both devices to send their ephemeral Curve25519 public key to the other device.
  */
-internal interface VerifInfoKey : VerificationInfo {
+internal interface VerificationInfoKey : VerificationInfo {
 
     val transactionID: String?
     /**
@@ -27,6 +27,6 @@ internal interface VerifInfoKey : VerificationInfo {
     val key: String?
 }
 
-internal interface KeyVerifInfoFactory {
-    fun create(tid: String, pubKey: String): VerifInfoKey
+internal interface VerificationInfoKeyFactory {
+    fun create(tid: String, pubKey: String): VerificationInfoKey
 }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoMac.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoMac.kt
similarity index 90%
rename from matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoMac.kt
rename to matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoMac.kt
index 14da21a398..01fc865250 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoMac.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoMac.kt
@@ -15,7 +15,7 @@
  */
 package im.vector.matrix.android.internal.crypto.verification
 
-internal interface VerifInfoMac : VerificationInfo {
+internal interface VerificationInfoMac : VerificationInfo {
 
     val transactionID: String?
 
@@ -33,6 +33,6 @@ internal interface VerifInfoMac : VerificationInfo {
     val keys: String?
 }
 
-internal interface VerifInfoMacFactory {
-    fun create(tid: String, mac: Map<String, String>, keys: String) : VerifInfoMac
+internal interface VerificationInfoMacFactory {
+    fun create(tid: String, mac: Map<String, String>, keys: String) : VerificationInfoMac
 }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoStart.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoStart.kt
similarity index 96%
rename from matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoStart.kt
rename to matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoStart.kt
index 380022def7..f1cbd3f9f1 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerifInfoStart.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationInfoStart.kt
@@ -15,7 +15,7 @@
  */
 package im.vector.matrix.android.internal.crypto.verification
 
-interface VerifInfoStart : VerificationInfo {
+internal interface VerificationInfoStart : VerificationInfo {
 
     val method: String?
     val fromDevice: String?
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationMessageLiveObserver.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationMessageLiveObserver.kt
index 2886d78d8c..f75a11cdcb 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationMessageLiveObserver.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/VerificationMessageLiveObserver.kt
@@ -37,12 +37,13 @@ import timber.log.Timber
 import java.util.*
 import javax.inject.Inject
 
-internal class VerificationMessageLiveObserver @Inject constructor(@SessionDatabase realmConfiguration: RealmConfiguration,
-                                                                   @UserId private val userId: String,
-                                                                   private val cryptoService: CryptoService,
-                                                                   private val sasVerificationService: DefaultSasVerificationService,
-                                                                   private val taskExecutor: TaskExecutor) :
-        RealmLiveEntityObserver<EventEntity>(realmConfiguration) {
+internal class VerificationMessageLiveObserver @Inject constructor(
+        @SessionDatabase realmConfiguration: RealmConfiguration,
+        @UserId private val userId: String,
+        private val cryptoService: CryptoService,
+        private val sasVerificationService: DefaultSasVerificationService,
+        private val taskExecutor: TaskExecutor
+) : RealmLiveEntityObserver<EventEntity>(realmConfiguration) {
 
     override val query = Monarchy.Query<EventEntity> {
         EventEntity.types(it, listOf(
@@ -70,7 +71,7 @@ internal class VerificationMessageLiveObserver @Inject constructor(@SessionDatab
                 .toList()
 
         events.forEach { event ->
-            Timber.d("## SAS Verification live observer: received msgId: ${event.eventId}   msgtype: ${event.type} from ${event.senderId}")
+            Timber.d("## SAS Verification live observer: received msgId: ${event.eventId} msgtype: ${event.type} from ${event.senderId}")
             Timber.v("## SAS Verification live observer: received msgId: $event")
 
             // decrypt if needed?
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/SessionModule.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/SessionModule.kt
index b7d121998c..883fd37745 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/SessionModule.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/SessionModule.kt
@@ -167,7 +167,7 @@ internal abstract class SessionModule {
 
     @Binds
     @IntoSet
-    abstract fun bindVerificationEventObserver(verificationMessageLiveObserver: VerificationMessageLiveObserver): LiveEntityObserver
+    abstract fun bindVerificationMessageLiveObserver(verificationMessageLiveObserver: VerificationMessageLiveObserver): LiveEntityObserver
 
     @Binds
     abstract fun bindInitialSyncProgressService(initialSyncProgressService: DefaultInitialSyncProgressService): InitialSyncProgressService
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/DefaultSendService.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/DefaultSendService.kt
index acbe385ff6..0e6c93590b 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/DefaultSendService.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/DefaultSendService.kt
@@ -157,13 +157,12 @@ internal class DefaultSendService @AssistedInject constructor(@Assisted private
 
     override fun deleteFailedEcho(localEcho: TimelineEvent) {
         monarchy.writeAsync { realm ->
-            TimelineEventEntity.where(realm, roomId = roomId, eventId = localEcho.root.eventId
-                    ?: "").findFirst()?.let {
-                it.deleteFromRealm()
-            }
-            EventEntity.where(realm, eventId = localEcho.root.eventId ?: "").findFirst()?.let {
-                it.deleteFromRealm()
-            }
+            TimelineEventEntity.where(realm, roomId = roomId, eventId = localEcho.root.eventId ?: "")
+                    .findFirst()
+                    ?.let { it.deleteFromRealm() }
+            EventEntity.where(realm, eventId = localEcho.root.eventId ?: "")
+                    .findFirst()
+                    ?.let { it.deleteFromRealm() }
         }
     }
 
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoEventFactory.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoEventFactory.kt
index a225146d83..45172fb213 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoEventFactory.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoEventFactory.kt
@@ -286,7 +286,7 @@ internal class LocalEchoEventFactory @Inject constructor(
         )
     }
 
-    fun createVerificationRequest(roomId: String, fromDevice: String, to: String, methods: List<String>): Event {
+    fun createVerificationRequest(roomId: String, fromDevice: String, toUserId: String, methods: List<String>): Event {
         val localID = LocalEcho.createLocalEchoId()
         return Event(
                 roomId = roomId,
@@ -297,7 +297,7 @@ internal class LocalEchoEventFactory @Inject constructor(
                 content = MessageVerificationRequestContent(
                         body = stringProvider.getString(R.string.key_verification_request_fallback_message, userId),
                         fromDevice = fromDevice,
-                        to = to,
+                        toUserId = toUserId,
                         methods = methods
                 ).toContent(),
                 unsignedData = UnsignedData(age = null, transactionId = localID)
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoUpdater.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoUpdater.kt
index d6d924ab46..60d1a217a7 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoUpdater.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoUpdater.kt
@@ -25,7 +25,7 @@ import javax.inject.Inject
 
 internal class LocalEchoUpdater @Inject constructor(private val monarchy: Monarchy) {
 
-    suspend fun updateSendState(eventId: String, sendState: SendState) {
+    fun updateSendState(eventId: String, sendState: SendState) {
         Timber.v("Update local state of $eventId to ${sendState.name}")
         monarchy.writeAsync { realm ->
             val sendingEventEntity = EventEntity.where(realm, eventId).findFirst()
diff --git a/vector/src/main/java/im/vector/riotx/features/command/Command.kt b/vector/src/main/java/im/vector/riotx/features/command/Command.kt
index fbc3ddebe5..3f636775c0 100644
--- a/vector/src/main/java/im/vector/riotx/features/command/Command.kt
+++ b/vector/src/main/java/im/vector/riotx/features/command/Command.kt
@@ -40,7 +40,7 @@ enum class Command(val command: String, val parameters: String, @StringRes val d
     CLEAR_SCALAR_TOKEN("/clear_scalar_token", "", R.string.command_description_clear_scalar_token),
     SHRUG("/shrug", "<message>", R.string.command_description_shrug),
     // TODO temporary command
-    VERIFY_USER("/verify", "<userID>", R.string.command_description_spoiler);
+    VERIFY_USER("/verify", "<user-id>", R.string.command_description_verify);
 
     val length
         get() = command.length + 1
diff --git a/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt b/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt
index 23e30e1d3c..dcdb7ad8a2 100644
--- a/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt
+++ b/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt
@@ -244,13 +244,13 @@ object CommandParser {
 
                     ParsedCommand.SendSpoiler(message)
                 }
-                Command.SHRUG.command                -> {
-                    val message = textMessage.subSequence(Command.SHRUG.command.length, textMessage.length).trim()
+                Command.SHRUG.command                  -> {
+                    val message = textMessage.substring(Command.SHRUG.command.length).trim()
 
                     ParsedCommand.SendShrug(message)
                 }
 
-                Command.VERIFY_USER.command                -> {
+                Command.VERIFY_USER.command            -> {
                     val message = textMessage.substring(Command.VERIFY_USER.command.length).trim()
 
                     ParsedCommand.VerifyUser(message)
diff --git a/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt b/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
index efdfd53234..c1d3f4ce4a 100644
--- a/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
+++ b/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
@@ -377,14 +377,12 @@ class RoomDetailViewModel @AssistedInject constructor(@Assisted initialState: Ro
                             popDraft()
                         }
                         is ParsedCommand.SendShrug                -> {
-                            val sequence: CharSequence = buildString {
+                            val sequence = buildString {
                                 append("¯\\_(ツ)_/¯")
-                                        .apply {
-                                            if (slashCommandResult.message.isNotEmpty()) {
-                                                append(" ")
-                                                append(slashCommandResult.message)
-                                            }
-                                        }
+                                if (slashCommandResult.message.isNotEmpty()) {
+                                    append(" ")
+                                    append(slashCommandResult.message)
+                                }
                             }
                             room.sendTextMessage(sequence)
                             _sendMessageResultLiveData.postLiveEvent(SendMessageResult.SlashCommandHandled())
diff --git a/vector/src/main/java/im/vector/riotx/features/settings/VectorSettingsLabsFragment.kt b/vector/src/main/java/im/vector/riotx/features/settings/VectorSettingsLabsFragment.kt
index cd201900fb..8b1a2dba31 100644
--- a/vector/src/main/java/im/vector/riotx/features/settings/VectorSettingsLabsFragment.kt
+++ b/vector/src/main/java/im/vector/riotx/features/settings/VectorSettingsLabsFragment.kt
@@ -20,7 +20,9 @@ import im.vector.riotx.R
 import im.vector.riotx.core.preference.VectorSwitchPreference
 import javax.inject.Inject
 
-class VectorSettingsLabsFragment @Inject constructor(val vectorPreferences: VectorPreferences) : VectorSettingsBaseFragment() {
+class VectorSettingsLabsFragment @Inject constructor(
+        private val vectorPreferences: VectorPreferences
+) : VectorSettingsBaseFragment() {
 
     override var titleRes = R.string.room_settings_labs_pref_title
     override val preferenceXmlRes = R.xml.vector_settings_labs
diff --git a/vector/src/main/res/xml/vector_settings_labs.xml b/vector/src/main/res/xml/vector_settings_labs.xml
index 1a64f75de5..530c207749 100644
--- a/vector/src/main/res/xml/vector_settings_labs.xml
+++ b/vector/src/main/res/xml/vector_settings_labs.xml
@@ -46,7 +46,7 @@
         android:title="@string/labs_swipe_to_reply_in_timeline" />
 
     <im.vector.riotx.core.preference.VectorSwitchPreference
-        android:defaultValue="false"
+        android:defaultValue="@bool/debug_mode"
         android:key="SETTINGS_LABS_ALLOW_EXTENDED_LOGS"
         android:summary="@string/labs_allow_extended_logging_summary"
         android:title="@string/labs_allow_extended_logging" />