add file import of the xpub descriptor jade writes to usb storage

src/main/java/com/sparrowwallet/sparrow/io/Jade.java

@@ -1,12 +1,18 @@
 package com.sparrowwallet.sparrow.io;
 
+import com.google.common.io.CharStreams;
+import com.sparrowwallet.drongo.OutputDescriptor;
 import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.protocol.ScriptType;
 import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.KeystoreSource;
+import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.drongo.wallet.WalletModel;
 
 import java.io.File;
 import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 
 public class Jade implements KeystoreFileImport {
     @Override
@@ -26,12 +32,35 @@ public class Jade implements KeystoreFileImport {
 
     @Override
     public Keystore getKeystore(PolicyType policyType, ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
-        throw new ImportException("Failed to detect a valid " + scriptType.getDescription() + " keystore.");
+        try {
+            String text = CharStreams.toString(new InputStreamReader(inputStream, StandardCharsets.UTF_8)).trim();
+            OutputDescriptor outputDescriptor = OutputDescriptor.getOutputDescriptor(text);
+            if(policyType == PolicyType.SINGLE_SP) {
+                throw new IllegalArgumentException("Export does not contain the spscan value for silent payments");
+            } else if(outputDescriptor.getScriptType() != scriptType) {
+                throw new IllegalArgumentException("The exported xpub is for " + outputDescriptor.getScriptType().getDescription() + ", not " + scriptType.getDescription()
+                        + ". Select " + scriptType.getDescription() + " in the options when using Export Xpub on your Jade, and export again.");
+            }
+
+            Wallet wallet = outputDescriptor.toWallet();
+            if(wallet.getKeystores().size() != 1) {
+                throw new IllegalArgumentException("Could not determine keystore from import");
+            }
+
+            Keystore keystore = wallet.getKeystores().getFirst();
+            keystore.setLabel(getName());
+            keystore.setWalletModel(getWalletModel());
+            keystore.setSource(KeystoreSource.HW_AIRGAPPED);
+
+            return keystore;
+        } catch(Exception e) {
+            throw new ImportException("Error getting " + getName() + " keystore", e);
+        }
     }
 
     @Override
     public String getKeystoreImportDescription(int account) {
-        return "Import QR created on your Jade by selecting Options > Wallet > Export Xpub once you have loaded your seed. Make sure to select Singlesig as the Wallet type in the Options menu there.";
+        return "Import QR created on your Jade by selecting Options > Wallet > Export Xpub once you have loaded your seed, or the file written by Options > USB Storage > Export Xpub. Make sure to select Singlesig as the Wallet type in the Options menu there.";
     }
 
     @Override
@@ -41,6 +70,6 @@ public class Jade implements KeystoreFileImport {
 
     @Override
     public boolean isFileFormatAvailable() {
-        return false;
+        return true;
     }
 }

src/test/java/com/sparrowwallet/sparrow/io/JadeTest.java

@@ -0,0 +1,40 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.sparrowwallet.drongo.ExtendedKey;
+import com.sparrowwallet.drongo.policy.PolicyType;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.KeystoreSource;
+import com.sparrowwallet.drongo.wallet.WalletModel;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class JadeTest extends IoTest {
+    @Test
+    public void testImport() throws ImportException {
+        Jade jade = new Jade();
+        Keystore keystore = jade.getKeystore(PolicyType.SINGLE_HD, ScriptType.P2WPKH, getInputStream("jade-keystore.txt"), null);
+
+        Assertions.assertEquals("Jade", keystore.getLabel());
+        Assertions.assertEquals(WalletModel.JADE, keystore.getWalletModel());
+        Assertions.assertEquals(KeystoreSource.HW_AIRGAPPED, keystore.getSource());
+        Assertions.assertEquals("m/84'/0'/0'", keystore.getKeyDerivation().getDerivationPath());
+        Assertions.assertEquals("73c5da0a", keystore.getKeyDerivation().getMasterFingerprint());
+        Assertions.assertEquals(ExtendedKey.fromDescriptor("zpub6rFR7y4Q2AijBEqTUquhVz398htDFrtymD9xYYfG1m4wAcvPhXNfE3EfH1r1ADqtfSdVCToUG868RvUUkgDKf31mGDtKsAYz2oz2AGutZYs"), keystore.getExtendedPublicKey());
+        Assertions.assertTrue(keystore.isValid());
+    }
+
+    @Test
+    public void testImportScriptTypeMismatch() {
+        Jade jade = new Jade();
+        ImportException scriptTypeException = Assertions.assertThrows(ImportException.class, () -> jade.getKeystore(PolicyType.SINGLE_HD, ScriptType.P2TR, getInputStream("jade-keystore.txt"), null));
+        Assertions.assertTrue(scriptTypeException.getCause().getMessage().startsWith("The exported xpub is for Native Segwit (P2WPKH), not Taproot (P2TR)."));
+    }
+
+    @Test
+    public void testImportSilentPayments() {
+        Jade jade = new Jade();
+        ImportException silentPaymentsException = Assertions.assertThrows(ImportException.class, () -> jade.getKeystore(PolicyType.SINGLE_SP, ScriptType.P2TR, getInputStream("jade-keystore.txt"), null));
+        Assertions.assertEquals("Export does not contain the spscan value for silent payments", silentPaymentsException.getCause().getMessage());
+    }
+}

src/test/resources/com/sparrowwallet/sparrow/io/jade-keystore.txt

@@ -0,0 +1 @@
+wpkh([73c5da0a/84'/0'/0']xpub6CatWdiZiodmUeTDp8LT5or8nmbKNcuyvz7WyksVFkKB4RHwCD3XyuvPEbvqAQY3rAPshWcMLoP2fMFMKHPJ4ZeZXYVUhLv1VMrjPC7PW6V/0/*)#wc3n3van