Display specific message when verif code malformed

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt

@@ -84,7 +84,7 @@ internal class DefaultQrCodeVerificationTransaction(
         // Perform some checks
         if (otherQrCodeData.transactionId != transactionId) {
             Timber.d("## Verification QR: Invalid transaction actual ${otherQrCodeData.transactionId} expected:$transactionId")
-            cancel(CancelCode.QrCodeInvalid)
+            cancel(CancelCode.UnknownTransaction)
             return
         }
 

vector/src/main/java/im/vector/app/features/crypto/verification/conclusion/VerificationConclusionController.kt

@@ -86,6 +86,14 @@ class VerificationConclusionController @Inject constructor(
 
                 bottomGotIt()
             }
+            ConclusionState.INVALID_QR_CODE -> {
+                bottomSheetVerificationNoticeItem {
+                    id("invalid_qr")
+                    notice(host.stringProvider.getString(R.string.verify_invalid_qr_notice).toEpoxyCharSequence())
+                }
+
+                bottomGotIt()
+            }
             ConclusionState.CANCELLED -> {
                 bottomSheetVerificationNoticeItem {
                     id("notice_cancelled")

vector/src/main/java/im/vector/app/features/crypto/verification/conclusion/VerificationConclusionViewModel.kt

@@ -32,7 +32,8 @@ data class VerificationConclusionViewState(
 enum class ConclusionState {
     SUCCESS,
     WARNING,
-    CANCELLED
+    CANCELLED,
+    INVALID_QR_CODE
 }
 
 class VerificationConclusionViewModel(initialState: VerificationConclusionViewState) :
@@ -44,7 +45,9 @@ class VerificationConclusionViewModel(initialState: VerificationConclusionViewSt
             val args = viewModelContext.args<VerificationConclusionFragment.Args>()
 
             return when (safeValueOf(args.cancelReason)) {
-                CancelCode.QrCodeInvalid,
+                CancelCode.QrCodeInvalid -> {
+                    VerificationConclusionViewState(ConclusionState.INVALID_QR_CODE, args.isMe)
+                }
                 CancelCode.MismatchedUser,
                 CancelCode.MismatchedSas,
                 CancelCode.MismatchedCommitment,

vector/src/main/res/values/strings.xml

@@ -2361,6 +2361,7 @@
     </string>
 
     <string name="verify_cancelled_notice">Verification has been cancelled. You can start verification again.</string>
+    <string name="verify_invalid_qr_notice">This QR code looks malformed. Please try to verify with another method.</string>
     <string name="verification_cancelled">Verification Cancelled</string>
 
     <string name="recovery_passphrase">Recovery Passphrase</string>