wallet/gui: add silent-payments to address type dropdown

Author: Eunovo

src/interfaces/wallet.h

@@ -265,6 +265,9 @@ class Wallet
     // Return whether the wallet contains a Taproot scriptPubKeyMan
     virtual bool taprootEnabled() = 0;
 
+    // Return whether the wallet contains a Silent Payment scriptPubKeyMan
+    virtual bool silentPaymentsEnabled() = 0;
+
     // Return whether wallet uses an external signer.
     virtual bool hasExternalSigner() = 0;
 

src/qt/receivecoinsdialog.cpp

@@ -99,6 +99,9 @@ void ReceiveCoinsDialog::setModel(WalletModel *_model)
         if (model->wallet().taprootEnabled()) {
             add_address_type(OutputType::BECH32M, tr("Bech32m (Taproot)"), tr("Bech32m (BIP-350) is an upgrade to Bech32, wallet support is still limited."));
         }
+        if (model->wallet().silentPaymentsEnabled()) {
+            add_address_type(OutputType::SILENT_PAYMENTS, tr("Silent Payment"), tr("A Silent Payment address (BIP-352) can safely be reused. Wallet support is still limited."));
+        }
 
         // Set the button to be enabled or disabled based on whether the wallet can give out new addresses.
         ui->receiveButton->setEnabled(model->wallet().canGetAddresses());

src/wallet/interfaces.cpp

@@ -494,6 +494,10 @@ class WalletImpl : public Wallet
         auto spk_man = m_wallet->GetScriptPubKeyMan(OutputType::BECH32M, /*internal=*/false);
         return spk_man != nullptr;
     }
+    bool silentPaymentsEnabled() override {
+        auto spk_man = m_wallet->GetScriptPubKeyMan(OutputType::SILENT_PAYMENTS, /*internal=*/false);
+        return spk_man != nullptr;
+    }
     OutputType getDefaultAddressType() override { return m_wallet->m_default_address_type; }
     CAmount getDefaultMaxTxFee() override { return m_wallet->m_default_max_tx_fee; }
     void remove() override