Change SetType to SetInternal and remove m_address_type

m_address_type was used for two things:
1. Determine the type of descriptor to generate during
   SetupDescriptorGeneration
2. Sanity check during GetNewDestination.

There is no need to have this variable to accomplish those things.
1. Add a argument to SetupDescriptorGeneration indicating the address
   type to use
2. Use Descriptor::GetOutputType for the sanity check.

src/wallet/scriptpubkeyman.cpp

@@ -1497,7 +1497,7 @@ std::set<CKeyID> LegacyScriptPubKeyMan::GetKeys() const
     return set_address;
 }
 
-void LegacyScriptPubKeyMan::SetType(OutputType type, bool internal) {}
+void LegacyScriptPubKeyMan::SetInternal(bool internal) {}
 
 bool DescriptorScriptPubKeyMan::GetNewDestination(const OutputType type, CTxDestination& dest, std::string& error)
 {
@@ -1509,7 +1509,9 @@ bool DescriptorScriptPubKeyMan::GetNewDestination(const OutputType type, CTxDest
     {
         LOCK(cs_desc_man);
         assert(m_wallet_descriptor.descriptor->IsSingleType()); // This is a combo descriptor which should not be an active descriptor
-        if (type != m_address_type) {
+        Optional<OutputType> desc_addr_type = m_wallet_descriptor.descriptor->GetOutputType();
+        assert(desc_addr_type);
+        if (type != *desc_addr_type) {
             throw std::runtime_error(std::string(__func__) + ": Types are inconsistent");
         }
 
@@ -1777,7 +1779,7 @@ bool DescriptorScriptPubKeyMan::AddDescriptorKeyWithDB(WalletBatch& batch, const
     }
 }
 
-bool DescriptorScriptPubKeyMan::SetupDescriptorGeneration(const CExtKey& master_key)
+bool DescriptorScriptPubKeyMan::SetupDescriptorGeneration(const CExtKey& master_key, OutputType addr_type)
 {
     LOCK(cs_desc_man);
     assert(m_storage.IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
@@ -1794,7 +1796,7 @@ bool DescriptorScriptPubKeyMan::SetupDescriptorGeneration(const CExtKey& master_
     // Build descriptor string
     std::string desc_prefix;
     std::string desc_suffix = "/*)";
-    switch (m_address_type) {
+    switch (addr_type) {
     case OutputType::LEGACY: {
         desc_prefix = "pkh(" + xpub + "/44'";
         break;
@@ -2076,9 +2078,8 @@ uint256 DescriptorScriptPubKeyMan::GetID() const
     return id;
 }
 
-void DescriptorScriptPubKeyMan::SetType(OutputType type, bool internal)
+void DescriptorScriptPubKeyMan::SetInternal(bool internal)
 {
-    this->m_address_type = type;
     this->m_internal = internal;
 }
 

src/wallet/scriptpubkeyman.h

@@ -224,7 +224,7 @@ public:
 
     virtual uint256 GetID() const { return uint256(); }
 
-    virtual void SetType(OutputType type, bool internal) {}
+    virtual void SetInternal(bool internal) {}
 
     /** Prepends the wallet name in logging output to ease debugging in multi-wallet use cases */
     template<typename... Params>
@@ -370,7 +370,7 @@ public:
 
     uint256 GetID() const override;
 
-    void SetType(OutputType type, bool internal) override;
+    void SetInternal(bool internal) override;
 
     // Map from Key ID to key metadata.
     std::map<CKeyID, CKeyMetadata> mapKeyMetadata GUARDED_BY(cs_KeyStore);
@@ -497,7 +497,6 @@ private:
     PubKeyMap m_map_pubkeys GUARDED_BY(cs_desc_man);
     int32_t m_max_cached_index = -1;
 
-    OutputType m_address_type;
     bool m_internal = false;
 
     KeyMap m_map_keys GUARDED_BY(cs_desc_man);
@@ -522,9 +521,9 @@ public:
         :   ScriptPubKeyMan(storage),
             m_wallet_descriptor(descriptor)
         {}
-    DescriptorScriptPubKeyMan(WalletStorage& storage, OutputType address_type, bool internal)
+    DescriptorScriptPubKeyMan(WalletStorage& storage, bool internal)
         :   ScriptPubKeyMan(storage),
-            m_address_type(address_type), m_internal(internal)
+            m_internal(internal)
         {}
 
     mutable RecursiveMutex cs_desc_man;
@@ -549,7 +548,7 @@ public:
     bool IsHDEnabled() const override;
 
     //! Setup descriptors based on the given CExtkey
-    bool SetupDescriptorGeneration(const CExtKey& master_key);
+    bool SetupDescriptorGeneration(const CExtKey& master_key, OutputType addr_type);
 
     bool HavePrivateKeys() const override;
 
@@ -573,7 +572,7 @@ public:
 
     uint256 GetID() const override;
 
-    void SetType(OutputType type, bool internal) override;
+    void SetInternal(bool internal) override;
 
     void SetCache(const DescriptorCache& cache);
 

src/wallet/wallet.cpp

@@ -4369,7 +4369,7 @@ void CWallet::SetupDescriptorScriptPubKeyMans()
 
     for (bool internal : {false, true}) {
         for (OutputType t : OUTPUT_TYPES) {
-            auto spk_manager = std::unique_ptr<DescriptorScriptPubKeyMan>(new DescriptorScriptPubKeyMan(*this, t, internal));
+            auto spk_manager = std::unique_ptr<DescriptorScriptPubKeyMan>(new DescriptorScriptPubKeyMan(*this, internal));
             if (IsCrypted()) {
                 if (IsLocked()) {
                     throw std::runtime_error(std::string(__func__) + ": Wallet is locked, cannot setup new descriptors");
@@ -4378,7 +4378,7 @@ void CWallet::SetupDescriptorScriptPubKeyMans()
                     throw std::runtime_error(std::string(__func__) + ": Could not encrypt new descriptors");
                 }
             }
-            spk_manager->SetupDescriptorGeneration(master_key);
+            spk_manager->SetupDescriptorGeneration(master_key, t);
             uint256 id = spk_manager->GetID();
             m_spk_managers[id] = std::move(spk_manager);
             SetActiveScriptPubKeyMan(id, t, internal);
@@ -4391,7 +4391,7 @@ void CWallet::SetActiveScriptPubKeyMan(uint256 id, OutputType type, bool interna
     WalletLogPrintf("Setting spkMan to active: id = %s, type = %d, internal = %d\n", id.ToString(), static_cast<int>(type), static_cast<int>(internal));
     auto& spk_mans = internal ? m_internal_spk_managers : m_external_spk_managers;
     auto spk_man = m_spk_managers.at(id).get();
-    spk_man->SetType(type, internal);
+    spk_man->SetInternal(internal);
     spk_mans[type] = spk_man;
 
     if (!memonly) {