Fix / fail to update usk when dl own keys

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/RealmCryptoStore.kt

@@ -313,6 +313,25 @@ internal class RealmCryptoStore(private val realmConfiguration: RealmConfigurati
                                     signingInfo.setSelfSignedKey(keyEntity)
                                 }
 
+                                // Only for me
+                                if (userSigningKey != null) {
+                                    val existingUSK = signingInfo.getUserSigningKey()
+                                    if (existingUSK != null && existingUSK.publicKeyBase64 == userSigningKey.unpaddedBase64PublicKey) {
+                                        // update signatures?
+                                        existingUSK.putSignatures(userSigningKey.signatures)
+                                        existingUSK.usages = userSigningKey.usages?.toTypedArray()?.let { RealmList(*it) }
+                                                ?: RealmList()
+                                    } else {
+                                        val keyEntity = realm.createObject(KeyInfoEntity::class.java).apply {
+                                            this.publicKeyBase64 = userSigningKey.unpaddedBase64PublicKey
+                                            this.usages = userSigningKey.usages?.toTypedArray()?.let { RealmList(*it) }
+                                                    ?: RealmList()
+                                            this.putSignatures(userSigningKey.signatures)
+                                        }
+                                        signingInfo.setUserSignedKey(keyEntity)
+                                    }
+                                }
+
                                 userEntity.crossSigningInfoEntity = signingInfo
                             }
                         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/model/CrossSigningInfoEntity.kt

@@ -46,4 +46,14 @@ internal open class CrossSigningInfoEntity(
                 .forEach { crossSigningKeys.remove(it) }
         info?.let { crossSigningKeys.add(it) }
     }
+
+    fun getUserSigningKey() = crossSigningKeys.firstOrNull { it.usages.contains(KeyUsage.USER_SIGNING.value) }
+
+    fun setUserSignedKey(info: KeyInfoEntity?) {
+        crossSigningKeys
+                .filter { it.usages.contains(KeyUsage.USER_SIGNING.value) }
+                .forEach { crossSigningKeys.remove(it) }
+        info?.let { crossSigningKeys.add(it) }
+    }
+
 }