diff --git a/src/GWallet.Backend.Tests/Deserialization.fs b/src/GWallet.Backend.Tests/Deserialization.fs
index a7b7866e6..1d7a1f535 100644
--- a/src/GWallet.Backend.Tests/Deserialization.fs
+++ b/src/GWallet.Backend.Tests/Deserialization.fs
@@ -10,11 +10,15 @@ open GWallet.Backend.UtxoCoin
 [<TestFixture>]
 type Deserialization() =
 
+    [<SetUp>]
+    member __.``Versioning works``() =
+        MarshallingData.AssertAssemblyVersion()
+
     [<Test>]
     member __.``deserialize cache does not fail``() =
 
         let deserializedCache: DietCache = Marshalling.Deserialize
-                                               MarshallingData.SofisticatedCachingDataExampleInJson
+                                               MarshallingData.SophisticatedCachingDataExampleInJson
 
         Assert.That(deserializedCache, Is.Not.Null)
 
diff --git a/src/GWallet.Backend.Tests/GWallet.Backend.Tests.fsproj b/src/GWallet.Backend.Tests/GWallet.Backend.Tests.fsproj
index 7407d1b20..a61297f78 100644
--- a/src/GWallet.Backend.Tests/GWallet.Backend.Tests.fsproj
+++ b/src/GWallet.Backend.Tests/GWallet.Backend.Tests.fsproj
@@ -23,6 +23,7 @@
     <Compile Include="Serialization.fs" />
     <Compile Include="Deserialization.fs" />
     <Compile Include="ExceptionMarshalling.fs" />
+    <Compile Include="MetaMarshalling.fs" />
     <Compile Include="Program.fs" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/GWallet.Backend.Tests/MarshallingData.fs b/src/GWallet.Backend.Tests/MarshallingData.fs
index e8f27c0cf..90e1e6a37 100644
--- a/src/GWallet.Backend.Tests/MarshallingData.fs
+++ b/src/GWallet.Backend.Tests/MarshallingData.fs
@@ -175,9 +175,9 @@ module MarshallingData =
                                      .Add("0xFOOBARBAZ", [Currency.ETC.ToString()])
     let private fiatValues = Map.empty.Add(Currency.ETH.ToString(), 161.796m)
                                       .Add(Currency.ETC.ToString(), 169.99999999m)
-    let SofisticatedCachingDataExample = { UsdPrice = fiatValues; Addresses = addresses; Balances = balances; }
+    let SophisticatedCachingDataExample = { UsdPrice = fiatValues; Addresses = addresses; Balances = balances; }
 
-    let SofisticatedCachingDataExampleInJson =
+    let SophisticatedCachingDataExampleInJson =
         sprintf """{
   "Version": "%s",
   "TypeName": "%s",
@@ -312,7 +312,7 @@ module MarshallingData =
     let someEtherTransactionInfo =
         {
             Proposal = someUnsignedEtherTransactionProposal;
-            Cache = SofisticatedCachingDataExample;
+            Cache = SophisticatedCachingDataExample
             Metadata = someEtherTxMetadata;
         }
     let SignedEtherTransactionExample =
@@ -325,3 +325,11 @@ module MarshallingData =
 
     let UnsignedEtherTransactionExampleInJson =
         ReadEmbeddedResource "unsignedAndFormattedEtherTransaction.json"
+
+    let AssertAssemblyVersion() =
+        Assert.That(
+            VersionHelper.CURRENT_VERSION,
+            Is.Not.EqualTo "1.0.0.0",
+            "Proper version was somehow not properly assigned as assembly version"
+        )
+
diff --git a/src/GWallet.Backend.Tests/MetaMarshalling.fs b/src/GWallet.Backend.Tests/MetaMarshalling.fs
new file mode 100644
index 000000000..eb60590b8
--- /dev/null
+++ b/src/GWallet.Backend.Tests/MetaMarshalling.fs
@@ -0,0 +1,23 @@
+namespace GWallet.Backend.Tests
+
+open NUnit.Framework
+
+open GWallet.Backend
+
+[<TestFixture>]
+type MetaMarshalling() =
+
+    [<Test>]
+    member __.``wrapper's TypeName property doesn't contain assembly-qualified-name``() =
+        let json = Marshalling.Serialize MarshallingData.SignedBtcTransactionExample
+        Assert.That(json, Is.Not.Null)
+        Assert.That(json, Is.Not.Empty)
+
+        let wrapper = Marshalling.ExtractWrapper json
+        Assert.That(wrapper, Is.Not.Null)
+        Assert.That(wrapper.TypeName, Is.Not.Null)
+        Assert.That(wrapper.TypeName, Is.Not.Empty)
+        Assert.That(wrapper.Version, Is.Not.Null)
+        Assert.That(wrapper.Version, Is.Not.Empty)
+
+        Assert.That(wrapper.TypeName, Does.Not.Contain "Version=")
diff --git a/src/GWallet.Backend.Tests/Serialization.fs b/src/GWallet.Backend.Tests/Serialization.fs
index afc048db4..9a4aeb861 100644
--- a/src/GWallet.Backend.Tests/Serialization.fs
+++ b/src/GWallet.Backend.Tests/Serialization.fs
@@ -8,6 +8,11 @@ open GWallet.Backend
 
 [<TestFixture>]
 type Serialization() =
+
+    [<SetUp>]
+    member __.``Versioning works``() =
+        MarshallingData.AssertAssemblyVersion()
+
     [<Test>]
     member __.``basic caching export does not fail``() =
         let json = Marshalling.Serialize MarshallingData.EmptyCachingDataExample
@@ -24,12 +29,12 @@ type Serialization() =
     [<Test>]
     member __.``complex caching export works``() =
 
-        let json = Marshalling.Serialize MarshallingData.SofisticatedCachingDataExample
+        let json = Marshalling.Serialize MarshallingData.SophisticatedCachingDataExample
         Assert.That(json, Is.Not.Null)
         Assert.That(json, Is.Not.Empty)
 
         Assert.That(json,
-                    Is.EqualTo (MarshallingData.SofisticatedCachingDataExampleInJson))
+                    Is.EqualTo (MarshallingData.SophisticatedCachingDataExampleInJson))
 
     [<Test>]
     member __.``unsigned BTC transaction export``() =
diff --git a/src/GWallet.Backend.Tests/data/signedAndFormattedBtcTransaction.json b/src/GWallet.Backend.Tests/data/signedAndFormattedBtcTransaction.json
index d9ad44b3a..05ec34f6b 100644
--- a/src/GWallet.Backend.Tests/data/signedAndFormattedBtcTransaction.json
+++ b/src/GWallet.Backend.Tests/data/signedAndFormattedBtcTransaction.json
@@ -1,6 +1,6 @@
 {
   "Version": "{version}",
-  "TypeName": "GWallet.Backend.SignedTransaction`1[[GWallet.Backend.UtxoCoin.TransactionMetadata, GWallet.Backend, Version={version}, Culture=neutral, PublicKeyToken=null]]",
+  "TypeName": "GWallet.Backend.SignedTransaction`1[GWallet.Backend.UtxoCoin.TransactionMetadata]",
   "Value": {
     "TransactionInfo": {
       "Proposal": {
diff --git a/src/GWallet.Backend.Tests/data/signedAndFormattedEtherTransaction.json b/src/GWallet.Backend.Tests/data/signedAndFormattedEtherTransaction.json
index 401148db1..68b8e4e3c 100644
--- a/src/GWallet.Backend.Tests/data/signedAndFormattedEtherTransaction.json
+++ b/src/GWallet.Backend.Tests/data/signedAndFormattedEtherTransaction.json
@@ -1,6 +1,6 @@
 {
   "Version": "{version}",
-  "TypeName": "GWallet.Backend.SignedTransaction`1[[GWallet.Backend.Ether.TransactionMetadata, GWallet.Backend, Version={version}, Culture=neutral, PublicKeyToken=null]]",
+  "TypeName": "GWallet.Backend.SignedTransaction`1[GWallet.Backend.Ether.TransactionMetadata]",
   "Value": {
     "TransactionInfo": {
       "Proposal": {
diff --git a/src/GWallet.Backend.Tests/data/signedAndFormattedSaiTransaction.json b/src/GWallet.Backend.Tests/data/signedAndFormattedSaiTransaction.json
index 0dd6bfab1..70e6e14c1 100644
--- a/src/GWallet.Backend.Tests/data/signedAndFormattedSaiTransaction.json
+++ b/src/GWallet.Backend.Tests/data/signedAndFormattedSaiTransaction.json
@@ -1,6 +1,6 @@
 {
   "Version": "{version}",
-  "TypeName": "GWallet.Backend.SignedTransaction`1[[GWallet.Backend.Ether.TransactionMetadata, GWallet.Backend, Version={version}, Culture=neutral, PublicKeyToken=null]]",
+  "TypeName": "GWallet.Backend.SignedTransaction`1[GWallet.Backend.Ether.TransactionMetadata]",
   "Value": {
     "TransactionInfo": {
       "Proposal": {
diff --git a/src/GWallet.Backend.Tests/data/unsignedAndFormattedBtcTransaction.json b/src/GWallet.Backend.Tests/data/unsignedAndFormattedBtcTransaction.json
index ded175992..35781105e 100644
--- a/src/GWallet.Backend.Tests/data/unsignedAndFormattedBtcTransaction.json
+++ b/src/GWallet.Backend.Tests/data/unsignedAndFormattedBtcTransaction.json
@@ -1,6 +1,6 @@
 {
   "Version": "{version}",
-  "TypeName": "GWallet.Backend.UnsignedTransaction`1[[GWallet.Backend.UtxoCoin.TransactionMetadata, GWallet.Backend, Version={version}, Culture=neutral, PublicKeyToken=null]]",
+  "TypeName": "GWallet.Backend.UnsignedTransaction`1[GWallet.Backend.UtxoCoin.TransactionMetadata]",
   "Value": {
     "Proposal": {
       "OriginAddress": "16pKBjGGZkUXo1afyBNf5ttFvV9hauS1kR",
diff --git a/src/GWallet.Backend.Tests/data/unsignedAndFormattedEtherTransaction.json b/src/GWallet.Backend.Tests/data/unsignedAndFormattedEtherTransaction.json
index 983317930..e7ac16878 100644
--- a/src/GWallet.Backend.Tests/data/unsignedAndFormattedEtherTransaction.json
+++ b/src/GWallet.Backend.Tests/data/unsignedAndFormattedEtherTransaction.json
@@ -1,6 +1,6 @@
 {
   "Version": "{version}",
-  "TypeName": "GWallet.Backend.UnsignedTransaction`1[[GWallet.Backend.Ether.TransactionMetadata, GWallet.Backend, Version={version}, Culture=neutral, PublicKeyToken=null]]",
+  "TypeName": "GWallet.Backend.UnsignedTransaction`1[GWallet.Backend.Ether.TransactionMetadata]",
   "Value": {
     "Proposal": {
       "OriginAddress": "0xf3j4m0rjx94sushh03j",
diff --git a/src/GWallet.Backend.Tests/data/unsignedAndFormattedSaiTransaction.json b/src/GWallet.Backend.Tests/data/unsignedAndFormattedSaiTransaction.json
index b79f0c8ed..3b3e067c2 100644
--- a/src/GWallet.Backend.Tests/data/unsignedAndFormattedSaiTransaction.json
+++ b/src/GWallet.Backend.Tests/data/unsignedAndFormattedSaiTransaction.json
@@ -1,6 +1,6 @@
 {
   "Version": "{version}",
-  "TypeName": "GWallet.Backend.UnsignedTransaction`1[[GWallet.Backend.Ether.TransactionMetadata, GWallet.Backend, Version={version}, Culture=neutral, PublicKeyToken=null]]",
+  "TypeName": "GWallet.Backend.UnsignedTransaction`1[GWallet.Backend.Ether.TransactionMetadata]",
   "Value": {
     "Proposal": {
       "OriginAddress": "0xba766d6d13E2Cc921Bf6e896319D32502af9e37E",
diff --git a/src/GWallet.Backend/Account.fs b/src/GWallet.Backend/Account.fs
index a2b006f1a..9243bc17a 100644
--- a/src/GWallet.Backend/Account.fs
+++ b/src/GWallet.Backend/Account.fs
@@ -714,13 +714,13 @@ module Account =
 
         match transType with
         | _ when transType = typeof<SignedTransaction<UtxoCoin.TransactionMetadata>> ->
-            let deserializedBtcTransaction: SignedTransaction<UtxoCoin.TransactionMetadata> =
+            let deserializedTransaction: SignedTransaction<UtxoCoin.TransactionMetadata> =
                     Marshalling.Deserialize json
-            deserializedBtcTransaction.ToAbstract()
+            deserializedTransaction.ToAbstract()
         | _ when transType = typeof<SignedTransaction<Ether.TransactionMetadata>> ->
-            let deserializedBtcTransaction: SignedTransaction<Ether.TransactionMetadata> =
+            let deserializedTransaction: SignedTransaction<Ether.TransactionMetadata> =
                     Marshalling.Deserialize json
-            deserializedBtcTransaction.ToAbstract()
+            deserializedTransaction.ToAbstract()
         | _ when transType.GetGenericTypeDefinition() = typedefof<UnsignedTransaction<_>> ->
             raise TransactionNotSignedYet
         | unexpectedType ->
diff --git a/src/GWallet.Backend/BlockExplorer.fs b/src/GWallet.Backend/BlockExplorer.fs
index 81fd08b97..9f63decf4 100644
--- a/src/GWallet.Backend/BlockExplorer.fs
+++ b/src/GWallet.Backend/BlockExplorer.fs
@@ -14,8 +14,7 @@ module BlockExplorer =
               | Currency.BTC ->
                   "https://mempool.space/address/"
               | Currency.LTC ->
-                  // because the more popular https://live.blockcypher.com/ltc/ doesn't seem to have segwit support
-                  "https://chainz.cryptoid.info/ltc/address.dws?"
+                  "https://litecoinspace.org/address/"
               | Currency.ETH ->
                   // most popular one...
                   "https://etherscan.io/address/"
@@ -32,7 +31,7 @@ module BlockExplorer =
               | Currency.BTC ->
                   "https://mempool.space/tx/"
               | Currency.LTC ->
-                  "https://chainz.cryptoid.info/ltc/tx.dws?"
+                  "https://litecoinspace.org/tx/"
               | Currency.ETH ->
                   "https://etherscan.io/tx/"
               | Currency.ETC ->
diff --git a/src/GWallet.Backend/Ether/EtherExceptions.fs b/src/GWallet.Backend/Ether/EtherExceptions.fs
index 7bb36b17f..a08d73033 100644
--- a/src/GWallet.Backend/Ether/EtherExceptions.fs
+++ b/src/GWallet.Backend/Ether/EtherExceptions.fs
@@ -32,6 +32,7 @@ type RpcErrorCode =
     | DailyRequestCountExceededSoRequestRateLimited = -32005
     | CannotFulfillRequest = -32046
     | ResourceNotFound = -32001
+    | InternalError = -32603
 
 type ServerCannotBeResolvedException =
     inherit CommunicationUnsuccessfulException
diff --git a/src/GWallet.Backend/Ether/EtherServer.fs b/src/GWallet.Backend/Ether/EtherServer.fs
index e755a1bb3..a8989d85e 100644
--- a/src/GWallet.Backend/Ether/EtherServer.fs
+++ b/src/GWallet.Backend/Ether/EtherServer.fs
@@ -231,6 +231,8 @@ module Server =
                     raise <| ServerRefusedException(exMsg, rpcResponseEx)
                 | h when h = int RpcErrorCode.ResourceNotFound ->
                     raise <| ServerMisconfiguredException(exMsg, rpcResponseEx)
+                | i when i = int RpcErrorCode.InternalError ->
+                    raise <| ServerFaultException(exMsg, rpcResponseEx)
                 | _ ->
                     raise
                     <| Exception (SPrintF3 "RpcResponseException with RpcError Code <%i> and Message '%s' (%s)"
diff --git a/src/GWallet.Backend/Marshalling.fs b/src/GWallet.Backend/Marshalling.fs
index 17836fc7a..47ab70c10 100644
--- a/src/GWallet.Backend/Marshalling.fs
+++ b/src/GWallet.Backend/Marshalling.fs
@@ -97,7 +97,7 @@ type MarshallingWrapper<'T> =
         {
             Value = value
             Version = VersionHelper.CURRENT_VERSION
-            TypeName = typeof<'T>.FullName
+            TypeName = typeof<'T>.ToString()
         }
 
 type private PascalCase2LowercasePlusUnderscoreContractResolver() =
@@ -148,15 +148,46 @@ module Marshalling =
 
     let private currentVersion = VersionHelper.CURRENT_VERSION
 
-    let ExtractType(json: string): Type =
+    let ExtractWrapper(json: string): MarshallingWrapper<obj> =
+        if String.IsNullOrEmpty json then
+            raise <| ArgumentNullException "json"
         let wrapper = JsonConvert.DeserializeObject<MarshallingWrapper<obj>> json
         if Object.ReferenceEquals(wrapper, null) then
             failwith <| SPrintF1 "Failed to extract type from JSON (null check): %s" json
-        try
-            Type.GetType wrapper.TypeName
-        with
-        | :? NullReferenceException as _nre ->
-            failwith <| SPrintF1 "Failed to extract type from JSON (NRE): %s" json
+        if String.IsNullOrEmpty wrapper.TypeName then
+            failwith <| SPrintF1 "Failed to extract type from JSON (inner null check 1): %s" json
+        if String.IsNullOrEmpty wrapper.Version then
+            failwith <| SPrintF1 "Failed to extract type from JSON (inner null check 2): %s" json
+        wrapper
+
+    let ExtractType(json: string): Type =
+        let wrapper = ExtractWrapper json
+
+        let res =
+            try
+                // we prefer an ex with innerException than an NRE caused by the
+                // consumer of this function
+                let throwOnError = true
+
+                Type.GetType(wrapper.TypeName, throwOnError)
+            with
+            | :? NullReferenceException as _nre ->
+                failwith
+                <| SPrintF1 "Failed to extract type from JSON (NRE): %s" json
+            | ex ->
+                let errMsg =
+                    SPrintF2 "Problem when trying to find type '%s' (version '%s')"
+                        wrapper.TypeName
+                        wrapper.Version
+                raise <| Exception(errMsg, ex)
+        if isNull res then
+            failwith
+            <| SPrintF2
+                    "Could not find type '%s' (version '%s')"
+                    wrapper.TypeName
+                    wrapper.Version
+        res
+
 
     // FIXME: should we rather use JContainer.Parse? it seems JObject.Parse wouldn't detect error in this: {A:{"B": 1}}
     //        (for more info see replies of https://stackoverflow.com/questions/6903477/need-a-string-json-validator )