Add a little bit of error handling

src/bdk.udl

@@ -2,7 +2,50 @@ namespace bdk {
 
 };
 
+[Error]
+enum BdkError {
+  "InvalidU32Bytes",
+  "Generic",
+  "ScriptDoesntHaveAddressForm",
+  "NoRecipients",
+  "NoUtxosSelected",
+  "OutputBelowDustLimit",
+  "InsufficientFunds",
+  "BnBTotalTriesExceeded",
+  "BnBNoExactMatch",
+  "UnknownUtxo",
+  "TransactionNotFound",
+  "TransactionConfirmed",
+  "IrreplaceableTransaction",
+  "FeeRateTooLow",
+  "FeeTooLow",
+  "FeeRateUnavailable",
+  "MissingKeyOrigin",
+  "Key",
+  "ChecksumMismatch",
+  "SpendingPolicyRequired",
+  "InvalidPolicyPathError",
+  "Signer",
+  "InvalidNetwork",
+  "InvalidProgressValue",
+  "ProgressUpdateError",
+  "InvalidOutpoint",
+  "Descriptor",
+  "AddressValidator",
+  "Encode",
+  "Miniscript",
+  "Bip32",
+  "Secp256k1",
+  "Json",
+  "Hex",
+  "Psbt",
+  "PsbtParse",
+  "Electrum",
+  "Sled",
+};
+
 interface OfflineWallet {
+    [Throws=BdkError]
     constructor(string descriptor);
     string get_new_address();
 };

src/lib.rs

@@ -2,30 +2,29 @@ use bdk::bitcoin::Network;
 use bdk::sled;
 use bdk::sled::Tree;
 use bdk::wallet::AddressIndex;
+use bdk::Error;
 use bdk::Wallet;
 use std::sync::Mutex;
 
+type BdkError = Error;
+
 uniffi_macros::include_scaffolding!("bdk");
 
 struct OfflineWallet {
     wallet: Mutex<Wallet<(), Tree>>,
-    //wallet: RwLock<Vec<String>>
 }
 
 impl OfflineWallet {
-    fn new(descriptor: String) -> Self {
+    fn new(descriptor: String) -> Result<Self, BdkError> {
         let database = sled::open("testdb").unwrap();
         let tree = database.open_tree("test").unwrap();
-
-        let wallet = Wallet::new_offline(&descriptor, None, Network::Regtest, tree).unwrap();
-
-        OfflineWallet {
-            wallet: Mutex::new(wallet),
-        }
-
-        //        OfflineWallet {
-        //            wallet: RwLock::new(Vec::new())
-        //        }
+        let wallet = Mutex::new(Wallet::new_offline(
+            &descriptor,
+            None,
+            Network::Regtest,
+            tree,
+        )?);
+        Ok(OfflineWallet { wallet })
     }
 
     fn get_new_address(&self) -> String {