[wallet] don't crash on serialization errors from wallet-core

This should not be necessary if we had a stable API with documentated
and versioned changes, but well...

3 files changed, 15 insertions, 9 deletions

diff --git a/wallet/build.gradle b/wallet/build.gradle
index 70b9648..5d02bca 100644
--- a/wallet/build.gradle
+++ b/wallet/build.gradle
@@ -105,8 +105,8 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
 
     implementation 'androidx.preference:preference:1.1.1'
-    implementation 'com.google.android.material:material:1.2.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.0'
+    implementation "com.google.android.material:material:$material_version"
+    implementation "androidx.constraintlayout:constraintlayout:$constraintlayout_version"
 
     // Lists and Selection
     implementation "androidx.recyclerview:recyclerview:1.1.0"
@@ -133,8 +133,8 @@ dependencies {
 
     testImplementation 'junit:junit:4.13'
     testImplementation 'org.json:json:20200518'
-    androidTestImplementation 'androidx.test:runner:1.2.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    androidTestImplementation 'androidx.test:runner:1.3.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 }
 
 def walletLibraryDir = "src/main/assets"
diff --git a/wallet/src/main/java/net/taler/wallet/backend/WalletBackendApi.kt b/wallet/src/main/java/net/taler/wallet/backend/WalletBackendApi.kt
index c6261bf..a72df9c 100644
--- a/wallet/src/main/java/net/taler/wallet/backend/WalletBackendApi.kt
+++ b/wallet/src/main/java/net/taler/wallet/backend/WalletBackendApi.kt
@@ -158,12 +158,19 @@ class WalletBackendApi(
             }
             sendRequest(operation, args?.invoke(JSONObject())) { isError, message ->
                 val response = if (isError) {
-                    val error = json.decodeFromString(WalletErrorInfo.serializer(), message.toString())
+                    val error =
+                        json.decodeFromString(WalletErrorInfo.serializer(), message.toString())
                     WalletResponse.Error(error)
                 } else {
-                    @Suppress("UNCHECKED_CAST") // if serializer is null, T must be Unit
-                    val t: T = serializer?.let { json.decodeFromString(serializer, message.toString()) } ?: Unit as T
-                    WalletResponse.Success(t)
+                    try {
+                        val t: T = serializer?.let {
+                            json.decodeFromString(serializer, message.toString())
+                        } ?: Unit as T
+                        WalletResponse.Success(t)
+                    } catch (e: Exception) {
+                        val info = WalletErrorInfo(0, "", e.toString(), null)
+                        WalletResponse.Error(info)
+                    }
                 }
                 cont.resume(response)
             }
diff --git a/wallet/src/test/java/net/taler/wallet/payment/PaymentResponsesTest.kt b/wallet/src/test/java/net/taler/wallet/payment/PaymentResponsesTest.kt
index 15702c6..fbdc07d 100644
--- a/wallet/src/test/java/net/taler/wallet/payment/PaymentResponsesTest.kt
+++ b/wallet/src/test/java/net/taler/wallet/payment/PaymentResponsesTest.kt
@@ -57,7 +57,6 @@ class PaymentResponsesTest {
             "max_wire_fee": "CHF:0.1",
             "max_fee": "CHF:0.1",
             "wire_fee_amortization": 10,
-            "merchant_base_url": "https:\/\/backend.chf.taler.net\/instances\/department\/",
             "merchant": {
               "name": "BFH Department Technik und Informatik",
               "instance": "department"